Terminal, base station, and communication method

Abstract

To distribute the frequencies for monitoring LP-WUS among multiple candidate frequencies.SOLUTION: A terminal includes a control unit that determines a frequency for monitoring the LP-WUS from a plurality of candidate frequencies received from a base station, and a receiving unit that monitors the LP-WUS using the frequency.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a terminal, a base station, and a communication method in a wireless communication system. [Background technology]

[0002] 3GPP (registered trademark) (3rd Generation Partnership Project) is currently studying a wireless communication method called 5G or NR (New Radio) (hereinafter, this wireless communication method will be referred to as "NR") in order to achieve further increases in system capacity, further increases in data transmission speed, and further reductions in latency in wireless sections (for example, Non-Patent Document 1).

[0003] Furthermore, 3GPP (registered trademark) has proposed technologies of a Low-Power Wake-Up Signal (LP-WUS) and a Low-Power Wake-Up Receiver (LP-WUR) for monitoring and receiving the LP-WUS in order to reduce power consumption in wireless communication systems. A terminal equipped with an LP-WUR also includes a main radio (MR) in addition to the LP-WUR. The terminal puts the MR into deep sleep mode, and when it receives an LP-WUS via the LP-WUR, it cancels the deep sleep mode of the MR and wakes up the MR. [Prior art documents] [Non-patent literature]

[0004] [Non-Patent Document 1] 3GPP TS 38.300 V18.2.0(2024-06) Summary of the Invention [Problem to be solved by the invention]

[0005] To monitor LP-WUS, it is being considered to transition terminals to a specific frequency. However, this method may result in many terminals concentrating on a specific frequency, resulting in resource exhaustion.

[0006] The present invention has been made in view of the above points, and has an object to provide a technique for distributing the frequencies for monitoring LP-WUS among a plurality of candidate frequencies. [Means for solving the problem]

[0007] According to the disclosed technology, a control unit that determines a frequency for monitoring LP-WUS from a plurality of candidate frequencies received from a base station; a receiver that monitors the LP-WUS using the frequency; A terminal comprising: [Effects of the Invention]

[0008] According to the disclosed technology, the frequencies for monitoring LP-WUS can be distributed among a plurality of candidate frequencies. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 2] 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. [Figure 3] FIG. 10 is a diagram for explaining communication by LP-WUS / LP-WUR. [Figure 4] FIG. 1 is a diagram for explaining communication by LP-WUS / LP-WUR. [Figure 5] FIG. 1 is a diagram showing Solution 1 in the prior art. [Figure 6] FIG. 1 is a diagram showing Solution 2 in the prior art. [Figure 7] FIG. 1 is a diagram showing Solution 3 in the prior art. [Figure 8] FIG. 2 is a diagram for explaining an example of operation in the first embodiment. [Figure 9] FIG. 2 is a diagram for explaining an example of operation in the first embodiment. [Figure 10] FIG. 10 is a diagram for explaining an example of operation in the second embodiment. [Figure 11] FIG. 10 is a diagram for explaining an example of operation in the second embodiment. [Figure 12] FIG. 2 is a diagram for explaining an example of operation in the first and second embodiments. [Figure 13] 10A and 10B are diagrams for explaining an example of operation in the third and fourth embodiments. [Figure 14] 2 is a diagram illustrating an example of a functional configuration of a base station 10 according to an embodiment of the present invention. [Figure 15] FIG. 2 is a diagram illustrating an example of a functional configuration of a terminal 20 according to the embodiment of the present invention. [Figure 16] 2 is a diagram illustrating an example of a hardware configuration of a base station 10 or a terminal 20 according to an embodiment of the present invention. [Figure 17] FIG. 1 is a diagram illustrating an example of a vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment. In the following description, " / " means "or" unless it is clear from the context that it has a different meaning.

[0011] (System Configuration) Fig. 1 is a diagram illustrating a wireless communication system according to an embodiment of the present invention. As shown in Fig. 1, the wireless communication system according to the embodiment of the present invention includes a base station 10 and a terminal 20. Although Fig. 1 shows one base station 10 and one terminal 20, this is an example, and there may be a plurality of each.

[0012] The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined in the time domain and the frequency domain, and the time domain may be defined by the number of OFDM symbols, and the frequency domain may be defined by the number of subcarriers or the number of resource blocks. Furthermore, a TTI (Transmission Time Interval) in the time domain may be a slot, or the TTI may be a subframe. Note that a cell and a CC may be considered synonymous.

[0013] Base station 10 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with terminal 20. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used.

[0014] The base station 10 transmits a synchronization signal, system information, and the like to the terminal 20. The synchronization signal is, for example, NR-PSS and NR-SSS. The system information is transmitted, for example, on the NR-PBCH or PDSCH, and is also called broadcast information. As shown in FIG. 1 , the base station 10 transmits control signals or data to the terminal 20 on the DL (Downlink) and receives control signals or data from the terminal 20 on the UL (Uplink). Note that, here, what is transmitted on a control channel such as the PUCCH or PDCCH is called a control signal, and what is transmitted on a shared channel such as the PUSCH or PDSCH is called data, but these names are merely examples. Furthermore, UCI (Uplink Control Information) is transmitted on the PUCCH or PUSCH.

[0015] The terminal 20 is a communication device equipped with a wireless communication function, such as a smartphone, a mobile phone, a tablet, a wearable terminal, or an M2M (Machine-to-Machine) communication module. As shown in Fig. 1, the terminal 20 receives control signals or data from the base station 10 via DL and transmits control signals or data to the base station 10 via UL, thereby utilizing various communication services provided by the wireless communication system. The terminal 20 may be referred to as a UE, and the base station 10 may be referred to as a gNB.

[0016] Terminal 20 is capable of performing carrier aggregation, which aggregates multiple cells (multiple CCs (component carriers)) to communicate with base station 10. In carrier aggregation, one PCell (primary cell) and one or more SCells (secondary cells) are used. Also, a PUCCH-SCell having a PUCCH may be used.

[0017] Fig. 2 shows an example of the configuration of a wireless communication system when DC (Dual connectivity) is implemented. As shown in Fig. 2, a base station 10A serving as an MN (Master Node) and a base station 10B serving as an SN (Secondary Node) are provided. The base station 10A and the base station 10B are each connected to a core network 40. A terminal 20 can communicate with both the base station 10A and the base station 10B.

[0018] A cell group provided by base station 10A, which is an MN, is called an MCG (Master Cell Group), and a cell group provided by base station 10B, which is an SN, is called an SCG (Secondary Cell Group). In addition, in a DC, an MCG is composed of one PCell and one or more SCells, and an SCG is composed of one PSCell (Primary SCell) and one or more SCells.

[0019] The processing operations in this embodiment may be executed in the system configuration shown in FIG. 1, in the system configuration shown in FIG. 2, or in any other system configuration.

[0020] (Regarding LP-WUS operations) Since the terminal 20 in this embodiment is equipped with an LP-WUR (Low-Power Wake-Up Receiver) for receiving an LP-WUS (Low-Power Wake-Up Signal), matters relating to the LP-WUS in this embodiment will be described here.

[0021] LP-WUS was introduced to achieve both low power consumption and low latency in the terminal 20 (also called UE). In addition, adding dedicated hardware, LP-WUR, to the terminal 20 can drastically improve performance.

[0022] Fig. 3 is a diagram for explaining the basic operation of the LP-WUS. As shown in Fig. 3, a terminal 20 is equipped with a new LP-WUR 21 in addition to a normal Rx chain (MR (Main Receiver) 22). The LP-WUR may also be called an LR.

[0023] The terminal 20 puts the MR 22 into deep sleep mode, and when it receives a LP-WUS (Low-power wake-up signal) from the base station 10 via the LP-WUR 21, it releases the MR 22 from deep sleep mode (wakes up the MR 22).

[0024] After the MR 22 wakes up, the MR 22 starts monitoring so that it can receive a DL signal according to the state of the terminal 20.

[0025] Specifically, when the terminal 20 is in an IDLE / INACTIVE state, the terminal 20 monitors the paging message. Note that "IDLE / INACTIVE" means "IDLE or INACTIVE." When the terminal 20 is in a CONNECTED state, the terminal 20 monitors the PDCCH.

[0026] The LP-WUS may also be called a low power signal, a wake-up signal, a low power wake-up signal, etc.

[0027] <Entry condition> Next, an entry condition (LP-WUS monitoring start condition), which is a condition under which the terminal 20 starts LP-WUS monitoring, will be described.

[0028] When the terminal 20 in the IDLE / INACTIVE state determines that both the following conditions (1) and (2) are satisfied, it puts the MR 22 into deep sleep mode and starts LP-WUS monitoring.

[0029] Condition (1): When the measurement result in MR22 exceeds the threshold Condition (2): When the measurement result in LR21 exceeds the threshold The "measurement result" is, for example, the received power of the reference signal (e.g., RSRP).

[0030] <Exit condition> Next, an Exit condition (LP-WUS monitoring termination condition) under which the terminal 20 terminates the LP-WUS monitoring will be described.

[0031] When the terminal 20 in the IDLE / INACTIVE state and performing LP-WUS monitoring determines that the following conditions are met, it wakes up the MR 22 and ends the LP-WUS monitoring.

[0032] Condition: When the measurement result in LR21 falls below the threshold <Example of operation> An example of operation related to entry / exit will be described with reference to Fig. 4. First, terminal 20, which is located near the outside of the cell, moves closer to base station 10. Terminal 20 determines that the entry condition is satisfied and starts monitoring LP-WUS. Next, when terminal 20 moves to a position away from base station 10, it determines that the exit condition is satisfied and ends monitoring LP-WUS.

[0033] The above entry condition and exit condition may be notified from the base station 10 to the terminal 20 that supports LP-WUS by means of system information.

[0034] (Considerations regarding MR22 and LR21 bands) In 3GPP (registered trademark), the following has been agreed upon: In RAN1, the common understanding is that a UE may not support LP-WUS reception on all the bands supported by the UE.

[0035] That is, the terminal 20 may be able to receive LP-WUS only in some bands among all bands supported by the MR22.

[0036] In a situation where "terminal 20 can receive LP-WUS only in some of the bands supported by MR22," the following two directions can be considered for implementing terminal 20 that supports LP-WUS.

[0037] Direction 1) The terminal 20 can enter the LP-WUS monitoring state only when it is present in a cell that has a band in which the terminal 20 can receive LP-WUS.

[0038] Direction 2) The terminal 20 can enter a state of monitoring an LP-WUS in a band different from the cell (band) in which it is currently located.

[0039] In the case of Direction 1, the cells that can use the LP-WUS function are limited, which reduces its practicality. Therefore, the direction of exploring Direction 2 has been agreed upon at a meeting of 3GPP (registered trademark).

[0040] It has been agreed at a 3GPP (registered trademark) meeting that Solutions 1 to 3 described below will be considered for Direction 2. Solutions 1 to 3 will be explained below. Hereinafter, the band in which terminal 20 monitors LP-WUS will be referred to as the LR band.

[0041] <Solution 1> 5 is a diagram showing Solution 1. In Solution 1, the MR 22 is prioritized by the SIB so as to camp on (be in range of) the LR band. The terminal 20 transitions from a certain band to the LR band by the SIB. The terminal 20 uses the LR band to monitor / receive LP-WUS, receive SIB, receive paging, and perform RACH (random access procedure).

[0042] <Solution 2> 6 is a diagram showing Solution 2. In Solution 2, the MR 22 is prioritized to camp on (stay in range of) the LR band by an SIB or an RRC release message. The terminal 20 uses the LR band to monitor / receive LP-WUS, receive SIBs, and receive paging.

[0043] In Solution 2, the terminal 20 performs cell reselection after receiving paging and offloads data from the LR band to another band.

[0044] <Solution 3> 7 is a diagram showing Solution 3. In Solution 3, the MR 22 is not prioritized to camp on (be in range of) the LR band, but the MR 22 is transitioned to the LR band by individual signaling depending on the load of the LR band. Specifically, the terminal 20 transitions to the LR band by an RRC Release message.

[0045] The terminal 20 uses the LR band to monitor / receive LP-WUS, receive SIB, receive paging, and perform RACH.

[0046] (About the assignment) In the above-described Solutions 1 to 3 for Direction 2, many terminals 20 may be concentrated in the LR band, which may result in resource exhaustion.

[0047] In particular, in Solutions 1 and 3, the frequency does not change from when terminal 20 receives LP-WUS until it performs RACH, which increases the possibility of resource exhaustion.

[0048] (Outline of the embodiment) In this embodiment, it is assumed that two or more LP-WUS candidate frequencies are provided. From the viewpoint of preventing resource exhaustion, the frequencies used by terminal 20 from receiving LP-WUS until performing RACH are distributed among the multiple LP-WUS candidate frequencies. Note that the LP-WUS candidate frequencies may also be called candidate LR bands. "LP-WUS candidate frequencies" may also be called "frequencies." These frequencies may also be called LR bands. These frequencies may also be called LP-WUS frequencies.

[0049] In this embodiment, in order to distribute the frequencies for performing "LP-WUS reception - RACH" among multiple terminals 20, the frequencies for monitoring LP-WUS are distributed using system information or an RRC Release message before terminal 20 enters the LP-WUS monitoring state.

[0050] In addition, in this embodiment, the system information or the RRC Release message can include, as instruction contents, either or both of an Entry condition and an Exit condition.

[0051] Hereinafter, first to fourth embodiments will be described as specific embodiments. In the following description, the NW (network) may be replaced with the base station 10.

[0052] (First embodiment) First, a first embodiment will be described. In the first embodiment, the terminal 20 determines a LP-WUS frequency to transition to from a plurality of LP-WUS candidate frequencies upon receiving an instruction from the NW. The instruction from the NW to the terminal 20 is given by system information.

[0053] The NW may instruct (notify) a plurality of LP-WUS candidate frequencies and their priority information to the terminal 20. When instructing priority information, the NW may instruct the terminal 20 of the expiration date of the frequency priority.

[0054] When receiving an instruction from the NW, the terminal 20 may determine the frequency to monitor the LP-WUS from multiple LP-WUS candidate frequencies based on the instructed priority and the measurement results of the MR22 (and / or LR21).

[0055] When receiving an instruction from the NW, the terminal 20 may determine the frequency to monitor the LP-WUS from multiple LP-WUS candidate frequencies based on either the instructed priority or the measurement results of the MR22 (and / or LR21).

[0056] Furthermore, after determining the LP-WUS frequency, the terminal 20 may report the frequency to the NW.

[0057] <First embodiment: Operation example> An example of operation in the first embodiment will be described with reference to the sequence diagram of Fig. 8. In S101, the base station 10 creates system information including a plurality of LP-WUS candidate frequencies and their priority information (priority information for each candidate frequency), and transmits the system information to the terminal 20. The terminal 20 receives the plurality of LP-WUS candidate frequencies and their priority information.

[0058] In S102, the terminal 20 determines a LP-WUS frequency to which to transition from among a plurality of LP-WUS candidate frequencies.

[0059] For example, assume that multiple LP-WUS candidate frequencies are LR band 1 and LR band 2, and the priorities are "LR band 1=1, LR band 2=1." The smaller the numerical value, the higher the priority.

[0060] For example, terminal 20 determines LR band 1, which has the highest priority, as the LP-WUS frequency to which the terminal will transition. Alternatively, terminal 20 may measure each of LR band 1 and LR band 2 and determine the LR band with the greater received power as the LP-WUS frequency to which the terminal will transition.

[0061] In S103, the terminal 20 reports to the base station 10 the LP-WUS frequency determined in S102.

[0062] In the first embodiment, since instructions are given in system information commonly received by multiple terminals, there is a possibility that many terminals will concentrate on a specific LP-WUS frequency. The report in S103 allows the base station 10 to know the LP-WUS frequency selected by each terminal 20. When the base station 10 detects that many terminals have concentrated on a specific LP-WUS frequency, it may instruct the multiple terminals 20 to transition to another LP-WUS frequency by individual signaling or the like.

[0063] An example of operation when determining an LP-WUS frequency and making a transition will be described with reference to Fig. 9. Note that the step numbers used below correspond to the step numbers in Fig. 8. In the example shown in Fig. 9, it is assumed that there are LR band1 and LR band2 as multiple LP-WUS candidate frequencies.

[0064] In S101, the terminal 20 receives an SIB from the base station 10. In S102, the terminal 20 selects LR band 1 as the LP-WUS frequency to transition to, and transitions to LR band 1. This allows the MR 22 to transmit and receive signals in LR band 1 while waking up. Also, the LR 21 can monitor and receive the LP-WUS while the MR 22 is sleeping.

[0065] After transitioning to LR band 1, the terminal 20 enters the IDLE / INACTIVE state by receiving an RRC Release message from the base station 10. When the terminal 20 determines that the entry condition is satisfied, it puts the MR 22 to sleep and starts LP-WUS monitoring by the LR 21.

[0066] After that, when the terminal 20 receives the LP-WUS, it moves to an operation using the MR 22. The terminal 20 performs SIB reception, paging reception, and RACH on the LR band 1.

[0067] 9, the terminal 20 transitions to LR band 1 immediately after selecting LR band 1, but this is just an example. The terminal 20 may transition to LR band 1 after a certain time has elapsed since selecting LR band 1.

[0068] <Effects of the first embodiment> The technology according to the first embodiment makes it possible to distribute the frequencies for monitoring LP-WUS among a plurality of candidate frequencies, that is, to realize offloading of LP-WUS frequencies.

[0069] Specifically, when there are multiple terminals 20 that support LP-WUS, it is possible to alleviate the situation where resources become congested due to multiple terminals 20 concentrating on LP-WUS reception and RACH on a single LP-WUS frequency.

[0070] (Second embodiment) Next, a second embodiment will be described. In the second embodiment, the terminal 20 determines a LP-WUS frequency to transition to from a plurality of LP-WUS candidate frequencies when the terminal 20 transitions from the CONNECTED state to the IDLE / INACTIVE state.

[0071] The NW may instruct (notify) a plurality of LP-WUS candidate frequencies and their priority information to the terminal 20. When instructing priority information, the NW may instruct the terminal 20 of the expiration date of the frequency priority.

[0072] When an instruction is given from the NW to the terminal 20, the instruction may be given by system information or an RRC Release message.

[0073] When terminal 20 transitions to the IDLE / INACTIVE state, it may determine the frequency to monitor the LP-WUS from multiple LP-WUS candidate frequencies based on the indicated priority and the measurement results of MR22 (and / or LR21).

[0074] When terminal 20 transitions to the IDLE / INACTIVE state, it may determine the frequency at which to monitor the LP-WUS from multiple LP-WUS candidate frequencies based on either the indicated priority or the measurement results of MR22 (and / or LR21).

[0075] <Second embodiment: Operation example> An example of operation in the second embodiment will be described with reference to the sequence diagram of Fig. 10. In S201, the base station 10 transmits a plurality of LP-WUS candidate frequencies and their priority information to the terminal 20 in system information or an RRC Release message. The terminal 20 receives the plurality of LP-WUS candidate frequencies and their priority information.

[0076] In S202, the terminal 20 transitions to the IDLE / INACTIVE state. In S203, the terminal 20 determines a LP-WUS frequency to transition to from a plurality of LP-WUS candidate frequencies.

[0077] For example, assume that multiple LP-WUS candidate frequencies are LR band 1 and LR band 2, and the priorities are "LR band 1 = 1, LR band 2 = 2." The smaller the numerical value, the higher the priority.

[0078] For example, terminal 20 determines LR band 1, which has the highest priority, as the LP-WUS frequency to which the terminal will transition. Alternatively, terminal 20 may measure each of LR band 1 and LR band 2 and determine the LR band with the greater received power as the LP-WUS frequency to which the terminal will transition.

[0079] An example of operation when determining an LP-WUS frequency and making a transition will be described with reference to Fig. 11. Note that the step numbers used below correspond to the step numbers in Fig. 10. In the example shown in Fig. 11, it is assumed that there are LR band1 and LR band2 as multiple LP-WUS candidate frequencies.

[0080] In S201, the terminal 20 receives an SIB from the base station 10. Here, it is assumed that this SIB indicates a plurality of LP-WUS candidate frequencies and their priority information.

[0081] In S202, the terminal 20 receives the RRC Release message and transitions to the IDLE / INACTIVE state. Also, in S203, it is assumed that the terminal 20 selects LR band 1 as the LP-WUS frequency to transition to.

[0082] The terminal 20 transitions to LR band 1. This allows the MR 22 to transmit and receive signals in LR band 1 while waking up. Also, the LR 21 can monitor and receive LP-WUS while the MR 22 is sleeping.

[0083] After transitioning to LR band 1, if the terminal 20 determines that the entry condition is satisfied, it puts the MR 22 to sleep and starts LP-WUS monitoring by the LR 21.

[0084] After that, when the terminal 20 receives the LP-WUS, it moves to an operation using the MR 22. The terminal 20 performs SIB reception, paging reception, and RACH on the LR band 1.

[0085] 11, the terminal 20 transitions to LR band 1 immediately after selecting LR band 1, but this is just an example. The terminal 20 may transition to LR band 1 after a certain time has elapsed since selecting LR band 1.

[0086] In either the first or second embodiment, similar to the above-described Solution 2, as shown in FIG. 12, after transitioning to LR band 1, a transition to another band may be made by Cell Reelection, and RACH may be performed in the other band.

[0087] <Effects of the second embodiment> The technology according to the second embodiment makes it possible to distribute the frequencies for monitoring LP-WUS among a plurality of candidate frequencies, that is, to realize offloading of LP-WUS frequencies.

[0088] Specifically, when there are multiple terminals 20 that support LP-WUS, it is possible to alleviate the situation where resources become congested due to multiple terminals 20 concentrating on LP-WUS reception and RACH on a single LP-WUS frequency.

[0089] (Third embodiment) Next, a third embodiment will be described. In the third embodiment, an entry / exit condition is set from the NW to the terminal 20 for each LP-WUS candidate frequency.

[0090] The NW may instruct (notify) multiple LP-WUS candidate frequencies to the terminal 20. Furthermore, the NW may instruct the terminal 20 of multiple LP-WUS candidate frequencies and LP-WUS entry / exit conditions (for MR and LR measurements) for each of the multiple LP-WUS candidate frequencies.

[0091] Furthermore, the NW may instruct the terminal 20, in addition to the plurality of LP-WUS candidate frequencies, the LP-WUS entry / exit conditions (for MR and LR measurements) for each of the plurality of LP-WUS candidate frequencies.

[0092] The "LP-WUS entry / exit condition" may be either an LP-WUS entry condition or an LP-WUS exit condition, or may be both an LP-WUS entry condition and an LP-WUS exit condition.

[0093] The instruction from the NW to the terminal 20 may be given by system information (SIB, etc.) or an RRC Release message. In addition, the NW may give the terminal 20 an instruction regarding the expiration date of the LP-WUS entry / exit condition.

[0094] When the terminal 20 is in the IDLE / INACTIVE state, the terminal 20 may enter the LP-WUS monitor state at the frequency that first satisfies the entry condition among a plurality of LP-WUS candidate frequencies instructed by the NW.

[0095] The third embodiment may be combined with the first embodiment. That is, in S101 of the first embodiment, the base station 10 may instruct the terminal 20 about multiple LP-WUS candidate frequencies as well as individual LP-WUS entry / exit conditions for each frequency.

[0096] Furthermore, the third embodiment may be combined with the second embodiment. That is, in S201 of the second embodiment, the base station 10 may instruct the terminal 20 about multiple LP-WUS candidate frequencies as well as individual LP-WUS entry / exit conditions for each frequency.

[0097] <Third embodiment: operation example> An example of operation in the third embodiment will be described with reference to the sequence diagram of Fig. 13. In S301, the base station 10 creates system information or an RRC release message including multiple LP-WUS candidate frequencies and the LP-WUS entry / exit conditions of each frequency, and transmits the system information or RRC release message to the terminal 20. The terminal 20 receives the multiple LP-WUS candidate frequencies and the LP-WUS entry / exit conditions of each frequency.

[0098] In S302, the terminal 20 enters the IDLE / INACTIVE state. In S303, the terminal 20 enters the LP-WUS monitor state at the frequency that first satisfies the entry condition.

[0099] For example, assume that the multiple LP-WUS candidate frequencies are LR band 1 and LR band 2. In the IDLE / INACTIVE state, terminal 20 measures each of LR band 1 and LR band 2, and when it detects that LR band 1 first satisfies the entry condition, it transitions to LR band 1 and enters the LP-WUS monitoring state.

[0100] <Effects of the third embodiment> The technology according to the third embodiment makes it possible to distribute the frequencies for monitoring LP-WUS among a plurality of candidate frequencies, that is, to realize offloading of LP-WUS frequencies.

[0101] Specifically, when there are multiple terminals 20 that support LP-WUS, it is possible to alleviate the situation where resources become congested due to multiple terminals 20 concentrating on LP-WUS reception and RACH on a single LP-WUS frequency.

[0102] (Fourth embodiment) Next, a fourth embodiment will be described. In the fourth embodiment, a common entry / exit condition is set from the NW to the terminal 20 for a plurality of LP-WUS candidate frequencies.

[0103] The NW may instruct (notify) multiple LP-WUS candidate frequencies to the terminal 20. Furthermore, the NW may instruct the terminal 20 of multiple LP-WUS candidate frequencies and LP-WUS entry / exit conditions (for MR and LR measurements) that are common to the multiple LP-WUS candidate frequencies.

[0104] Furthermore, the NW may instruct the terminal 20, in addition to the plurality of LP-WUS candidate frequencies, a common LP-WUS entry / exit condition (for MR and LR measurements) for the plurality of LP-WUS candidate frequencies.

[0105] The "LP-WUS entry / exit condition" may be either an LP-WUS entry condition or an LP-WUS exit condition, or may be both an LP-WUS entry condition and an LP-WUS exit condition.

[0106] The instruction from the NW to the terminal 20 may be given by system information (SIB, etc.) or an RRC Release message. In addition, the NW may give the terminal 20 an instruction regarding the expiration date of the LP-WUS entry / exit condition.

[0107] When the terminal 20 is in the IDLE / INACTIVE state, the terminal 20 may enter the LP-WUS monitor state at the frequency that first satisfies the entry condition among a plurality of LP-WUS candidate frequencies instructed by the NW.

[0108] The fourth embodiment may be combined with the first embodiment. That is, in S101 of the first embodiment, the base station 10 may instruct the terminal 20 of a common LP-WUS entry / exit condition together with a plurality of LP-WUS candidate frequencies.

[0109] Furthermore, the third embodiment may be combined with the second embodiment. That is, in S201 of the second embodiment, the base station 10 may instruct the terminal 20 of a common LP-WUS entry / exit condition together with a plurality of LP-WUS candidate frequencies.

[0110] An example of operation of the fourth embodiment is basically the same as that of the third embodiment, as shown in Fig. 13. However, unlike the third embodiment, the fourth embodiment differs in that, in S301, the base station 10 transmits multiple LP-WUS candidate frequencies and LP-WUS entry / exit conditions common to the multiple LP-WUS candidate frequencies to the terminal 20 in system information or an RRC Release message. The terminal 20 receives the multiple LP-WUS candidate frequencies and the LP-WUS entry / exit conditions common to the multiple LP-WUS candidate frequencies.

[0111] <Effects of the Fourth Embodiment> The technology according to the fourth embodiment makes it possible to distribute the frequencies for monitoring LP-WUS among a plurality of candidate frequencies, that is, to realize offloading of LP-WUS frequencies.

[0112] Specifically, when there are multiple terminals 20 that support LP-WUS, it is possible to alleviate the situation where resources become congested due to multiple terminals 20 concentrating on LP-WUS reception and RACH on a single LP-WUS frequency.

[0113] (Device configuration) Next, a description will be given of an example of the functional configuration of the base station 10 and the terminal 20 that execute the processes and operations described above. The base station 10 and the terminal 20 include functions for implementing all of the above-described embodiments. However, the base station 10 and the terminal 20 may each include only the functions of any of the embodiments.

[0114] <Base station 10> Fig. 14 is a diagram showing an example of the functional configuration of the base station 10. As shown in Fig. 14, the base station 10 has a transmitting unit 110, a receiving unit 120, a setting unit 130, and a control unit 140. The functional configuration shown in Fig. 14 is merely an example. The names of the functional divisions and functional units may be any as long as they can execute the operations according to the embodiment of the present invention. Furthermore, the transmitting unit 110 and the receiving unit 120 may be collectively referred to as a communication unit.

[0115] The transmitter 110 has a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The transmitter 110 can also transmit a signal to another network device. The receiver 120 has a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, information of a higher layer from the received signal. The receiver 120 can also receive a signal from a network device. The transmitter 110 also has a function of transmitting, to the terminal 20, NR-PSS, NR-SSS, NR-PBCH, DL / UL control signals, DCI via PDCCH, data via PDSCH, etc.

[0116] The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 in a storage device provided in the setting unit 130, and reads out the information from the storage device as needed.

[0117] The control unit 140 schedules DL reception or UL transmission for the terminal 20 via the transmission unit 110. The functional unit in the control unit 140 related to signal transmission may be included in the transmission unit 110, and the functional unit in the control unit 140 related to signal reception may be included in the reception unit 120.

[0118] <Terminal 20> FIG. 15 is a diagram showing an example of the functional configuration of terminal 20. As shown in FIG. 15, terminal 20 has a transmitting unit 210, a receiving unit 220, a low-power receiving unit 225, a setting unit 230, and a control unit 240. The functional configuration shown in FIG. 15 is merely an example. As long as the operations according to the embodiment of the present invention can be performed, the functional divisions and names of the functional units may be any. Transmitting unit 210 and receiving unit 220 may be collectively referred to as a main radio unit. The main radio unit corresponds to an MR. The main radio unit may include a control unit 240. The low-power receiving unit 225 corresponds to an LP-WUR. The low-power receiving unit 225 may also be referred to as a receiving unit.

[0119] The transmitter 210 creates a transmission signal from transmission data and transmits the transmission signal wirelessly. The receiver 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. The receiver 220 also has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL / UL / SL control signals, DCI via PDCCH, data via PDSCH, and the like transmitted from the base station 10. For example, the transmitter 210 may transmit a PSCCH (Physical Sidelink Control Channel), a PSSCH (Physical Sidelink Shared Channel), a PSDCH (Physical Sidelink Discovery Channel), a PSBCH (Physical Sidelink Broadcast Channel), and the like to another terminal 20 as D2D communication, and the receiver 220 may receive the PSCCH, PSSCH, PSDCH, or PSBCH, and the like, from the other terminal 20.

[0120] The low power receiver 225 monitors and receives the LP-WUS.

[0121] The setting unit 230 stores various pieces of setting information received from the base station 10 or other terminals by the receiving unit 220 in a storage device provided in the setting unit 230, and reads the information from the storage device as needed. The setting unit 230 also stores setting information that is set in advance.

[0122] The control unit 240 controls the terminal 20. The functional unit in the control unit 240 related to signal transmission may be included in the transmission unit 210, and the functional unit in the control unit 240 related to signal reception may be included in the reception unit 220. Furthermore, the transmission unit 210 may be called a transmitter, and the reception unit 220 may be called a receiver.

[0123] This specification discloses at least the matters described in the appendix below.

[0124] <Additional Notes> (Additional note 1) a control unit that determines a frequency for monitoring the LP-WUS from a plurality of candidate frequencies received from the base station; a receiver that monitors the LP-WUS using the frequency; A terminal comprising: (Additional note 2) The base station notifies the terminal of the plurality of candidate frequencies as well as priority information of each candidate frequency, and the control unit determines the frequency based on the priority information or a measurement result of each candidate frequency. A terminal as described in appendix 1. (Additional note 3) The base station notifies the terminal of an LP-WUS monitor start condition and an LP-WUS monitor end condition for each candidate frequency, or an LP-WUS monitor start condition and an LP-WUS monitor end condition common to the plurality of candidate frequencies. A terminal as described in appendix 1. (Additional note 4) When the terminal is in an IDLE / INACTIVE state, the control unit determines, from among the plurality of candidate frequencies, a frequency that first satisfies the LP-WUS monitoring start condition as a frequency for monitoring the LP-WUS. A terminal as described in Appendix 3. (Additional note 5) a control unit that generates information including a plurality of candidate frequencies for monitoring LP-WUS, and an LP-WUS monitoring start condition and an LP-WUS monitoring end condition for each candidate frequency, or an LP-WUS monitoring start condition and an LP-WUS monitoring end condition common to the plurality of candidate frequencies; a transmitting unit that transmits the information to a terminal; A base station comprising: (Additional note 6) determining a frequency for monitoring the LP-WUS from a plurality of candidate frequencies received from the base station; monitoring the LP-WUS using the frequency; A communication method executed by a terminal, comprising:

[0125] Any of the configurations described above allows the frequencies for monitoring LP-WUS to be distributed among multiple candidate frequencies. According to supplementary item 2, a determination can be made based on priority information of the candidate frequencies. According to supplementary items 3 and 4, it is possible to appropriately determine when to start and end LP-WUS monitoring.

[0126] (Hardware configuration) The block diagrams (FIGS. 14 and 15) 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 connected directly or indirectly (for example, by wire, wirelessly, etc.) and these multiple devices. The functional block may be realized by combining the single device or the multiple devices with software.

[0127] 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, consideration, broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocation, mapping, and assignment. For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. As mentioned above, there are no particular limitations on how these functions are implemented.

[0128] For example, the base station 10, the terminal 20, 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. 16 is a diagram illustrating an example of the hardware configuration of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be physically configured as a computer device including a processor 1001, a storage device 1002, an auxiliary storage device 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, etc.

[0129] In the following description, the term "apparatus" can be interpreted as a circuit, a device, a unit, etc. The hardware configurations of the base station 10, the terminal 20, and the LMF 30 may be configured to include one or more of the apparatuses shown in the drawings, or may be configured to exclude some of the apparatuses.

[0130] Each function in the base station 10 and the terminal 20 is realized by loading predetermined software (programs) onto hardware such as the processor 1001, the memory device 1002, etc., so that the processor 1001 performs calculations, controls communication by the communication device 1004, and controls at least one of reading and writing data in the memory device 1002 and the auxiliary memory device 1003.

[0131] The processor 1001 controls the entire computer by running, for example, an operating system. 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, the above-mentioned control unit 140, control unit 240, etc. may be realized by the processor 1001.

[0132] Furthermore, the processor 1001 reads programs (program codes), software modules, data, etc. from at least one of the auxiliary storage device 1003 and the communication device 1004 into the storage device 1002, and executes various processes in accordance with the programs. 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 140 of the base station 10 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. Furthermore, for example, the control unit 240 of the terminal 20 may be implemented by a control program stored in the storage device 1002 and running on the processor 1001. While the above-described various processes have been described as being executed by one processor 1001, they may also be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. The programs may be transmitted from a network via a telecommunications line.

[0133] The storage device 1002 is a computer-readable recording medium and may be configured, for example, by at least one of a read-only memory (ROM), an erasable programmable ROM (EPROM), an electrically erasable programmable ROM (EEPROM), a random access memory (RAM), etc. The storage device 1002 may also be called a register, a cache, a main memory, etc. The storage device 1002 can store executable programs (program codes), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

[0134] The secondary storage device 1003 is a computer-readable recording medium, and may be, for example, at least one of an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (e.g., a compact disk, a digital versatile disk, a Blu-ray disc), a smart card, a flash memory (e.g., a card, a stick, a key drive), a floppy disk, a magnetic strip, etc. The above-mentioned storage medium may be, for example, a database, a server, or other suitable medium including at least one of the storage device 1002 and the secondary storage device 1003.

[0135] 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, a transmission / reception antenna, an amplifier unit, a transmission / reception unit, a transmission path interface, etc. may be realized by the communication device 1004. The transmission / reception unit may be implemented as a transmission unit and a reception unit that are physically or logically separated.

[0136] The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that receives input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. Note that the input device 1005 and the output device 1006 may be integrated into one device (for example, a touch panel).

[0137] Furthermore, each device such as the processor 1001 and the storage device 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.

[0138] Furthermore, base station 10, terminal 20, and LMF 30 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 by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

[0139] Furthermore, the terminal 20 or the base station 10 may be provided in a vehicle 2001. Fig. 17 shows a configuration example of the vehicle 2001. As shown in Fig. 17, the vehicle 2001 includes a drive unit 2002, a steering unit 2003, an accelerator pedal 2004, a brake pedal 2005, a shift lever 2006, front wheels 2007, rear wheels 2008, an axle 2009, an electronic control unit 2010, various sensors 2021 to 2029, an information service unit 2012, and a communication module 2013. The terminal 20, the base station 10, or the LMF 30 according to each aspect / embodiment described in the present disclosure may be applied to a communication device mounted on the vehicle 2001, and may be applied to the communication module 2013, for example.

[0140] The drive unit 2002 is configured, for example, by an engine, a motor, or a hybrid of an engine and a motor. The steering unit 2003 includes at least a steering wheel (also called a handle), and is configured to steer at least one of the front wheels and the rear wheels based on the operation of the steering wheel operated by the user.

[0141] The electronic control unit 2010 is composed of a microprocessor 2031, a memory (ROM, RAM) 2032, and a communication port (IO port) 2033. Signals are input to the electronic control unit 2010 from various sensors 2021 to 2029 provided in the vehicle 2001. The electronic control unit 2010 may also be called an ECU (Electronic Control Unit).

[0142] The signals from the various sensors 2021 to 2029 include a current signal from a current sensor 2021 that senses the current of the motor, a rotation speed signal of the front and rear wheels obtained by a rotation speed sensor 2022, an air pressure signal of the front and rear wheels obtained by an air pressure sensor 2023, a vehicle speed signal obtained by a vehicle speed sensor 2024, an acceleration signal obtained by an acceleration sensor 2025, an accelerator pedal depression amount signal obtained by an accelerator pedal sensor 2029, a brake pedal depression amount signal obtained by a brake pedal sensor 2026, a shift lever operation signal obtained by a shift lever sensor 2027, and a detection signal for detecting obstacles, vehicles, pedestrians, etc. obtained by an object detection sensor 2028.

[0143] The information service unit 2012 is composed of various devices, such as a car navigation system, an audio system, speakers, a television, and a radio, for providing (outputting) various types of information, such as driving information, traffic information, and entertainment information, and one or more ECUs for controlling these devices. The information service unit 2012 uses information acquired from external devices via the communication module 2013 or the like to provide various types of multimedia information and multimedia services to the occupants of the vehicle 2001. The information service unit 2012 may include input devices (e.g., a keyboard, a mouse, a microphone, a switch, a button, a sensor, a touch panel, etc.) that accept input from the outside, and may also include output devices (e.g., a display, a speaker, an LED lamp, a touch panel, etc.) that output information to the outside.

[0144] The driving assistance system unit 2030 is composed of various devices that provide functions for preventing accidents and reducing the driver's driving burden, such as a millimeter-wave radar, a LiDAR (Light Detection and Ranging), a camera, a positioning locator (e.g., GNSS, etc.), map information (e.g., high-definition (HD) map, autonomous vehicle (AV) map, etc.), a gyro system (e.g., an IMU (Inertial Measurement Unit), an INS (Inertial Navigation System), etc.), an AI (Artificial Intelligence) chip, and an AI processor, as well as one or more ECUs that control these devices. The driving assistance system unit 2030 also transmits and receives various information via the communication module 2013 to realize the driving assistance function or the autonomous driving function.

[0145] The communication module 2013 can communicate with the microprocessor 2031 and components of the vehicle 2001 via the communication port. For example, the communication module 2013 transmits and receives data via the communication port 2033 to and from the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axle 2009, microprocessor 2031 and memory (ROM, RAM) 2032 in the electronic control unit 2010, and sensors 2021 to 29, which are provided in the vehicle 2001.

[0146] The communication module 2013 is a communication device that can be controlled by the microprocessor 2031 of the electronic control unit 2010 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 2013 may be located either inside or outside the electronic control unit 2010. The external device may be, for example, a base station, a mobile station, or the like.

[0147] The communication module 2013 may transmit at least one of signals from the above-mentioned various sensors 2021-2028 input to the electronic control unit 2010, information obtained based on the signals, and information based on input from the outside (user) obtained via the information service unit 2012 to an external device via wireless communication. The electronic control unit 2010, the various sensors 2021-2028, the information service unit 2012, etc. may be referred to as input units that accept input. For example, the PUSCH transmitted by the communication module 2013 may include information based on the above-mentioned input.

[0148] The communication module 2013 receives various information (traffic information, traffic signal information, vehicle distance information, etc.) transmitted from external devices and displays it on an information service unit 2012 provided in the vehicle 2001. The information service unit 2012 may 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 (or data / information decoded from the PDSCH) received by the communication module 2013). The communication module 2013 also stores the various information received from external devices in a memory 2032 that can be used by the microprocessor 2031. Based on the information stored in the memory 2032, the microprocessor 2031 may control the drive unit 2002, steering unit 2003, accelerator pedal 2004, brake pedal 2005, shift lever 2006, front wheels 2007, rear wheels 2008, axles 2009, sensors 2021 to 2029, etc. provided in the vehicle 2001.

[0149] (Supplementary explanation of the embodiment) Although the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and those skilled in the art will understand various modifications, alterations, alternatives, and substitutions. While specific numerical examples have been used to facilitate understanding of the invention, unless otherwise specified, these numerical values ​​are merely examples, and any appropriate values ​​may be used. The division of items in the above description is not essential to the present invention; two or more items may be combined as needed, and items described in one item may apply to items described in another item (unless inconsistent). The boundaries between functional units or processing units in the functional block diagram do not necessarily correspond to the boundaries between physical components. The operations of multiple functional units may be performed by a single physical component, or the operations of a single functional unit may be performed by multiple physical components. The order of the processing steps described in the embodiments may be reversed as long as there is no contradiction. For convenience of processing description, the base station 10 and terminal 20 have been described using functional block diagrams. However, such devices may be implemented using hardware, software, or a combination thereof. The software operated by the processor of the base station 10 in accordance with an embodiment of the present invention and the software operated by the processor of the terminal 20 in accordance with an embodiment of the present invention may each be stored in random access memory (RAM), flash memory, read-only memory (ROM), EPROM, EEPROM, registers, hard disk (HDD), removable disk, CD-ROM, database, server or any other suitable storage medium.

[0150] Furthermore, 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 may be performed by physical layer signaling (e.g., Downlink Control Information (DCI), Uplink Control Information (UCI)), higher layer signaling (e.g., Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling), broadcast information (Master Information Block (MIB), System Information Block (SIB)), other signals, or a combination thereof. Furthermore, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC Connection Setup message, an RRC Connection Reconfiguration message, or the like.

[0151] Each aspect / embodiment described in the present disclosure may be any of the following: LTE (Long Term Evolution), LTE-Advanced (LTE-A), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system), 6th generation mobile communication system (6G), xth generation mobile communication system (xG) (xG (x is, for example, an integer or decimal number)), FRA (Future Radio Access), NR (new Radio), New radio access (NX), Future generation radio access (FX), W-CDMA (registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE The present invention may be applied to at least one of systems using 802.20, UWB (Ultra-Wideband), Bluetooth (registered trademark), or other appropriate systems, and next-generation systems that are extended, modified, created, or defined based on these systems. The present invention may also be applied to a combination of multiple systems (e.g., a combination of at least one of LTE and LTE-A with 5G).

[0152] The order of the procedures, sequences, flowcharts, etc. of each aspect / embodiment described herein may be changed unless it is consistent. 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.

[0153] In this specification, a specific operation that is described as being performed by the base station 10 may also be performed by its upper node in some cases. In a network consisting of one or more network nodes having the base station 10, it is clear that various operations performed for communication with the terminal 20 may be performed by at least one of the base station 10 and another network node other than the base station 10 (such as, but not limited to, an MME or an S-GW). Although the above example illustrates a case where there is one other network node other than the base station 10, the other network node may be a combination of multiple other network nodes (such as an MME and an S-GW).

[0154] The information or signals described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer), or may be input / output via multiple network nodes.

[0155] Input and output information may be stored in a specific location (for example, memory) or may be managed using a management table. Input and output information may be overwritten, updated, or added to. Output information may be deleted. Input information may be sent to another device.

[0156] In the present disclosure, the determination may be made based on a value represented by one bit (0 or 1), a Boolean value (true or false), or a numerical comparison (e.g., comparison with a predetermined value).

[0157] 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.

[0158] 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), then these wired and / or wireless technologies are included within the definition of transmission media.

[0159] 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.

[0160] Note that terms explained in this disclosure and terms necessary for understanding this disclosure may be replaced with terms having the same or similar meanings. For example, at least one of a channel and a symbol may be a signal (signaling). Furthermore, a signal may be a message. Furthermore, a component carrier (CC) may be called a carrier frequency, a cell, a frequency carrier, etc.

[0161] As used in this disclosure, the terms "system" and "network" are used interchangeably.

[0162] 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 an index.

[0163] The names used for the above-described parameters are not intended to be limiting in any way. Furthermore, the mathematical expressions using these parameters may differ from those explicitly disclosed in this disclosure. The various channels (e.g., 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.

[0164] In this disclosure, terms such as "base station (BS)," "radio base station," "base station," "fixed station," "NodeB," "eNodeB (eNB)," "gNodeB (gNB)," "access point," "transmission point," "reception point," "transmission / reception point," "cell," "sector," "cell group," "carrier," and "component carrier" may be used interchangeably. Base stations may also be referred to by terms such as macrocell, small cell, femtocell, and picocell.

[0165] 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 divided 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 (RRH: Remote Radio Head)). The term "cell" or "sector" refers to a part or the entire coverage area of ​​a base station and / or base station subsystem that provides communication service within this coverage.

[0166] In the present disclosure, the base station transmitting information to a terminal may be interpreted as the base station instructing the terminal to control or operate based on the information.

[0167] In this disclosure, the terms "Mobile Station (MS)," "user terminal," "User Equipment (UE)," "terminal," etc. may be used interchangeably.

[0168] A mobile station may also be referred to by those skilled in the art 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.

[0169] At least one of the base station and the mobile station may be referred to as a transmitting device, a receiving device, a communication device, etc. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, etc. The mobile object refers to a movable object, and may move at any speed. Naturally, this also includes cases where the mobile object is stationary. Examples of the mobile object 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 (registered trademark), multicopters, quadcopters, balloons, and objects mounted thereon. The mobile object may also be an autonomous mobile object operating based on an operational command. It 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). At least one of the base station and the mobile station may be a device that does not necessarily move during communication operations. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

[0170] Furthermore, a base station in the present disclosure may be read as a 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 terminal is replaced with communication between a plurality of terminals 20 (which may be called, for example, D2D (Device-to-Device) or V2X (Vehicle-to-Everything)). In this case, the 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 communication between terminals (for example, "side"). For example, terms such as an uplink channel and a downlink channel may be read as a side channel.

[0171] Similarly, the term "terminal" in the present disclosure may be read as "base station." In this case, the base station may be configured to have the functions of the terminal described above.

[0172] As used in this disclosure, the terms "determining" and "determining" may encompass a wide variety of actions. "Determining" and "determining" may include, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (e.g., searching in a table, database, or other data structure), ascertaining, and the like. "Determining" and "determining" may also include receiving (e.g., receiving information), transmitting (e.g., sending information), input, output, accessing (e.g., accessing data in memory), and the like. Furthermore, "judgment" and "decision" can include regarding resolving, selecting, choosing, establishing, comparing, etc. as having been "judged" or "decided." In other words, "judgment" and "decision" can include regarding some action as having been "judged" or "decided." Furthermore, "judgment (decision)" can be interpreted as "assuming," "expecting," "considering," etc.

[0173] 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." As used in this disclosure, two elements may be considered to be "connected" or "coupled" to each other using one or more wires, cables, and / or printed electrical connections, as well as electromagnetic energy having wavelengths in the radio frequency range, microwave range, and optical (both visible and invisible) range, as some non-limiting and non-exhaustive examples.

[0174] The reference signal may be abbreviated as RS (Reference Signal) or may be called a pilot depending on the applicable standard.

[0175] 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."

[0176] 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.

[0177] The "means" in the configuration of each of the above devices may be replaced with "part," "circuit," "device," etc.

[0178] When used in this disclosure, the terms "include," "including," and variations thereof are intended to be inclusive, similar to the term "comprising." Furthermore, when used in this disclosure, the term "or" is not intended to be an exclusive or.

[0179] A radio frame may be composed of one or more frames in the time domain. Each of the one or more frames in the time domain may be called a subframe. A subframe may further 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.

[0180] Numerology may be communication parameters that apply to at least one of transmission and reception of a signal or channel, such as subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame structure, specific filtering operations performed by the transceiver in the frequency domain, and specific windowing operations performed by the transceiver in the time domain.

[0181] 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 be a time unit based on numerology.

[0182] 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 (or PUSCH) mapping type A. A PDSCH (or PUSCH) transmitted using a minislot may be called PDSCH (or PUSCH) mapping type B.

[0183] The radio frame, subframe, slot, minislot, and symbol all represent time units for transmitting signals, and may be referred to by other names corresponding to the radio frame, subframe, slot, minislot, and symbol.

[0184] For example, one subframe may be called a transmission time interval (TTI), multiple consecutive subframes may be called a TTI, or one slot or one minislot may be called 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, or the like instead of a subframe. Furthermore, one slot may be called a unit time. The unit time may differ for each cell depending on the numerology.

[0185] 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 wireless resources (such as frequency bandwidth and transmission power that can be used by each terminal 20) to each terminal 20 in TTI units. Note that the definition of TTI is not limited to this.

[0186] 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.

[0187] 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.

[0188] A TTI having a time length of 1 ms may be called a regular TTI (TTI in LTE 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.

[0189] 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 equal to or greater than 1 ms.

[0190] A resource block (RB) is a resource allocation unit in the time domain and 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 also be determined based on numerology.

[0191] The time domain of an RB may include one or more symbols and may have a length of one slot, one minislot, one subframe, or one TTI. One TTI, one subframe, etc. may each be composed of one or more resource blocks.

[0192] Note that one or more RBs may also be called a physical resource block (PRB), a sub-carrier group (SCG), a resource element group (REG), a PRB pair, an RB pair, or the like.

[0193] 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.

[0194] A Bandwidth Part (BWP) (which may also be referred to as a fractional 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 given BWP and numbered within that BWP.

[0195] The BWP may include a BWP for UL (UL BWP) and a BWP for DL ​​(DL BWP). One or more BWPs may be configured for a UE within one carrier.

[0196] 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."

[0197] 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.

[0198] 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.

[0199] 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."

[0200] Each aspect / embodiment described in this disclosure may be used alone, in combination, or switched depending on the implementation. Furthermore, notification of predetermined information (e.g., notification that "X is true") is not limited to being done explicitly, but may be done implicitly (e.g., by not notifying the predetermined information).

[0201] Although the present disclosure has been described in detail above, it is clear to those skilled in the art that the present disclosure is not limited to the embodiments described herein. The present disclosure can be implemented in modified and altered forms without departing from the spirit and scope of the present disclosure as defined by the claims. Therefore, the description of the present disclosure is intended to be illustrative and does not have any limiting meaning on the present disclosure. [Explanation of symbols]

[0202] 10 base station 110 Transmitter 120 Receiver 130 Setting section 140 Control Unit 20 terminals 210 Transmitter 220 Receiving unit 225 Low-power receiver 230 Setting Section 240 Control Unit 1001 processor 1002 Storage device 1003 Auxiliary storage device 1004 Communication equipment 1005 Input Device 1006 Output Device 2001 Vehicle 2002 Drive unit 2003 Steering Section 2004 accelerator pedal 2005 brake pedal 2006 Shift Lever 2007 front wheel 2008 rear wheel 2009 Axle 2010 Electronic Control Unit 2012 Information Services Department 2013 Communication Module 2021 Current Sensor 2022 RPM Sensor 2023 Air Pressure Sensor 2024 Vehicle speed sensor 2025 Acceleration Sensor 2026 Brake pedal sensor 2027 Shift lever sensor 2028 Object Detection Sensor 2029 Accelerator pedal sensor 2030 Driving Assistance Systems Department 2031 microprocessor 2032 memory (ROM, RAM) 2033 Communication port (IO port)

Claims

1. a control unit that determines a frequency for monitoring LP-WUS from a plurality of candidate frequencies received from a base station; a receiver that monitors the LP-WUS using the frequency; A terminal comprising:

2. The base station notifies the terminal of the plurality of candidate frequencies as well as priority information of each candidate frequency, and the control unit determines the frequency based on the priority information or a measurement result of each candidate frequency. The terminal according to claim 1 .

3. The base station notifies the terminal of an LP-WUS monitoring start condition and an LP-WUS monitoring end condition for each candidate frequency, or an LP-WUS monitoring start condition and an LP-WUS monitoring end condition common to the plurality of candidate frequencies. The terminal according to claim 1 .

4. When the terminal is in an IDLE / INACTIVE state, the control unit determines, from among the plurality of candidate frequencies, a frequency that first satisfies the LP-WUS monitoring start condition as a frequency for monitoring the LP-WUS. The terminal according to claim 3.

5. a control unit that creates information including a plurality of candidate frequencies for monitoring LP-WUS, and an LP-WUS monitoring start condition and an LP-WUS monitoring end condition for each candidate frequency, or an LP-WUS monitoring start condition and an LP-WUS monitoring end condition that are common to the plurality of candidate frequencies; a transmitting unit that transmits the information to a terminal; A base station comprising:

6. determining a frequency for monitoring LP-WUS from a plurality of candidate frequencies received from the base station; monitoring the LP-WUS using the frequency; A communication method executed by a terminal, comprising:

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