WO2023286179A1 - Terminal and communication method - Google Patents

Abstract

Provided is a terminal including a reception unit for receiving a simple radio signal, and a control unit for causing the reception unit to start an operation for receiving a normal radio signal when the simple radio signal is received. The reception unit receives the normal radio signal and thereby receives paging.

Description

Terminal and communication method

The present invention relates to a terminal and communication method in a wireless communication system.

NR (New Radio) (also called "5G"), which is the successor system to LTE (Long Term Evolution), requires a large-capacity system, high data transmission speed, low latency, and the simultaneous use of many terminals. Techniques satisfying connection, low cost, power saving, etc. are being studied (for example, Non-Patent Document 1).

　Furthermore, consideration of 6G as the next-generation wireless communication method of 5G has begun, and it is expected that wireless quality exceeding that of 5G will be realized. For example, in 6G, further increase in capacity, use of new frequency bands, further reduction in delay, further increase in reliability, and expansion of coverage in new areas (high altitude, sea, space) by non-terrestrial networks. Studies are underway toward the realization of the above (for example, Non-Patent Document 2).

3GPP TS 38.300 V16.6.0 (2021-06) 3GPP TR 38.821 V16.1.0 (2021-05)

A terminal that has transitioned to an idle mode (Idle mode, RRC_IDLE) or an inactive mode (Inactive mode, RRC_INACTIVE), which is an RRC (Radio Resource Control) state in NR, regardless of whether or not paging is performed, the terminal identifier Since it is necessary to wake up at PO (Paging Occasion) determined from (UE-ID), it has been difficult to reduce power consumption.

The present invention has been made in view of the above points, and can reduce power consumption in monitoring operations in a wireless communication system.

According to the disclosed technology, a receiving unit for receiving a simple radio signal and a control unit for causing the receiving unit to start an operation of receiving a normal radio signal when the simple radio signal is received. and the receiving unit is provided with a terminal that receives the normal radio signal and receives paging.

According to the disclosed technology, it is possible to reduce power consumption in monitoring operations in a wireless communication system.

1 is a diagram showing a configuration example (1) of a wireless communication system according to an embodiment of the present invention; FIG. FIG. 2 is a diagram showing a configuration example (2) of a wireless communication system according to an embodiment of the present invention; FIG. 4 is a diagram showing an example of terminal operation according to the embodiment of the present invention; FIG. 4 is a diagram showing an example (1) of wakeup operation according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (2) of wakeup operation according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (3) of wakeup operation according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (4) of wakeup operation according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (5) of wakeup operation according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (6) of wakeup operation according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (7) of wakeup operation according to the embodiment of the present invention; FIG. 4 is a diagram showing an example of time offsets according to an embodiment of the present invention; It is a figure which shows the example of the frequency offset which concerns on embodiment of this invention. It is a figure which shows the example (1) of the mode transition which concerns on embodiment of this invention. It is a figure which shows the example (2) of the mode transition which concerns on embodiment of this invention. It is a figure which shows the example (3) of the mode transition which concerns on embodiment of this invention. It is a figure which shows the example (4) of the mode transition based on embodiment of this invention. It is a figure which shows the example (5) of the mode transition which concerns on embodiment of this invention. FIG. 4 is a diagram showing an example (1) of operation switching according to the embodiment of the present invention; FIG. 9 is a diagram showing an example (2) of operation switching according to the embodiment of the present invention; FIG. 10 is a diagram showing an example (3) of operation switching according to the embodiment of the present invention; It is a figure showing an example of functional composition of base station 10 concerning an embodiment of the invention. 2 is a diagram showing an example of functional configuration of terminal 20 according to an embodiment of the present invention; FIG. 2 is a diagram showing an example of hardware configuration of base station 10 or terminal 20 according to an embodiment of the present invention; FIG.

Embodiments of the present invention will be described below with reference to the drawings. In addition, the embodiment described below is an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

Existing technologies are appropriately used for the operation of the wireless communication system according to the embodiment of the present invention. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. In addition, the term “LTE” used in this specification has a broad meaning including LTE-Advanced and LTE-Advanced and subsequent systems (eg, NR) unless otherwise specified.

Further, in the embodiments of the present invention described below, SS (Synchronization signal), PSS (Primary SS), SSS (Secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), PDCCH (Physical Downlink Control Channel), PDSCH (Physical Downlink Shared Channel), PUCCH (Physical Uplink Control Channel), PUSCH (Physical Uplink Shared Channel). This is for convenience of description, and signals, functions, etc. similar to these may be referred to by other names. Also, the above terms in NR correspond to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, and so on. However, even a signal used for NR is not necessarily specified as "NR-".

Further, in the embodiment of the present invention, the duplex system may be a TDD (Time Division Duplex) system, an FDD (Frequency Division Duplex) system, or other (for example, Flexible Duplex etc.) method may be used.

Further, in the embodiment of the present invention, "configuring" wireless parameters and the like may mean that predetermined values are preset (Pre-configure), and the base station 10 or A wireless parameter notified from the terminal 20 may be set.

FIG. 1 is a diagram showing a configuration example (1) of a wireless communication system according to an embodiment of the present invention. A wireless communication system according to an embodiment of the present invention includes a base station 10 and terminals 20, as shown in FIG. Although one base station 10 and one terminal 20 are shown in FIG. 1, this is an example and there may be more than one.

The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. Physical resources of radio signals are defined in the time domain and the frequency domain. The time domain may be defined by the number of OFDM (Orthogonal Frequency Division Multiplexing) symbols, and the frequency domain is defined by the number of subcarriers or resource blocks. good too. The base station 10 transmits synchronization signals and system information to the terminal 20 . Synchronization signals are, for example, NR-PSS and NR-SSS. The system information is transmitted by, for example, NR-PBCH, and is also called broadcast information. The synchronization signal and system information may be called SSB (SS/PBCH block). As shown in FIG. 1, the base station 10 transmits control signals or data to the terminal 20 on DL (Downlink) and receives control signals or data from the terminal 20 on UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals. Also, both the base station 10 and the terminal 20 can apply MIMO (Multiple Input Multiple Output) communication to DL or UL. Also, both the base station 10 and the terminal 20 may communicate via a secondary cell (SCell: Secondary Cell) and a primary cell (PCell: Primary Cell) by CA (Carrier Aggregation). Furthermore, the terminal 20 may communicate via a primary cell of the base station 10 and a primary secondary cell group cell (PSCell: Primary SCG Cell) of another base station 10 by DC (Dual Connectivity).

The terminal 20 is a communication device with a wireless communication function, such as a smartphone, mobile phone, tablet, wearable terminal, or M2M (Machine-to-Machine) communication module. As shown in FIG. 1 , the terminal 20 receives control signals or data from the base station 10 on the DL and transmits control signals or data to the base station 10 on the UL, thereby performing various functions provided by the wireless communication system. Use communication services. Also, the terminal 20 receives various reference signals transmitted from the base station 10, and measures channel quality based on the reception result of the reference signals.

The terminal 20 can perform carrier aggregation in which multiple cells (multiple CCs (Component Carriers)) are bundled and communicated with the base station 10 . In carrier aggregation, one PCell (Primary cell) and one or more SCells (Secondary cell) are used. A PUCCH-SCell with PUCCH may also be used.

FIG. 2 is a diagram for explaining example (2) of the wireless communication system according to the embodiment of the present invention. FIG. 2 shows a configuration example of a wireless communication system when DC (Dual connectivity) is performed. As shown in FIG. 2, a base station 10A serving as MN (Master Node) and a base station 10B serving as SN (Secondary Node) are provided. The base station 10A and base station 10B are each connected to a core network. Terminal 20 can communicate with both base station 10A and base station 10B.

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

The processing operations in the present embodiment may be executed with the system configuration shown in FIG. 1, may be executed with the system configuration shown in FIG. 2, or may be executed with a system configuration other than these.

Conventionally, the terminal 20 that has transitioned to an idle mode (Idle mode, RRC_IDLE) or an inactive mode (Inactive mode, RRC_INACTIVE), which is the RRC (Radio Resource Control) state of the NR terminal, regardless of the presence or absence of paging , PO (Paging Occasion) determined from the UE-ID. The power required for PO wake-up operations accounts for most of the power consumption of terminal 20 in idle mode and/or inactive mode. Hereinafter, idle mode and/or inactive mode are also referred to as "idle/inactive mode".

Here, in a future system, the presence or absence of paging will be detected by the terminal 20 using a simple radio system and signal, such as a passive receiver, separately from the signal that actually transmits and receives data between the terminal 20 and the base station 10. are being considered to notify With the simple wireless system and signals that are set separately from the signals that transmit and receive data, there is no need to wake up when there is no paging message, and power consumption can be significantly reduced.

On the other hand, there is a trade-off relationship between receiver power consumption and sensitivity and coverage. It is necessary to design a simple radio system in consideration of this relationship. For example, when introducing the simple wireless system, it is necessary to consider 1) to 3) shown below.

1) A simple wireless system and a method for identifying a terminal that uses a signal 2) Operation of a simple wireless system and a terminal that uses a signal, such as standby operation, operation after wakeup, etc. 3) Simple wireless system and How to switch between the operation of a terminal using signals and the operation of a conventional terminal

Therefore, a new terminal operation that monitors only the presence or absence of paging may be defined, and switching between the new terminal operation and the existing operation in consideration of the receiver capability and the like may be performed on the initiative of the base station 10 or the terminal 20.

FIG. 3 is a diagram showing an example of terminal operation according to the embodiment of the present invention. As shown in FIG. 3, a low power mode may be newly defined as an RRC state in addition to the connected mode and the idle/inactive mode. In low power mode, terminal 20 may perform UE action 1 to wake up on demand by detecting a simple signal command. Alternatively, the terminal 20 may perform UE action 1 with no low power mode defined and an on-demand wake-up by detecting a simple signal command in idle/inactive mode. The command may be, for example, a binary signal indicating paging or no paging, or a signal indicating paging when present and no paging when absent.

Also, operation switching between the UE operation 2, which is the conventional paging reception operation, and the new UE operation 1 may be performed based on a predetermined condition. The predetermined condition may be determined, for example, based on whether the radio wave reception environment of the terminal 20 is good, normal, or bad. Also, the terminal 20 may notify the base station 10 of the receiver capability, for example, as a UE capability report. The base station 10 may inform the terminal 20 to perform UE action 1 or UE action 2 depending on the receiver capabilities of the terminal 20 .

As described above, it is possible to reduce the power consumption of the terminal 20 by executing an appropriate operation in consideration of the terminal conditions such as receiver performance and propagation environment.

The terminal 20 may specify the UE capability, UE category, or UE type related to the presence or absence of a receiver and/or the function of the receiver, and notify the base station 10 of this. For example, the terminal 20 may notify the base station 10 of some or all of the information 1) to 8) shown below.

1) Presence or absence of on-board receivers 2) Number of on-board receivers 3) Sensitivity and/or coverage of on-board receivers 4) Power consumption of on-board receivers 5) Remaining power of UE 6) Information related to mobility of UE 7) Selected by UE Beam 8) UE location information

Also, as shown in Table 1, a combination of information may be associated with an index. The terminal 20 may notify the base station 10 of the index.

The example shown in Table 1 is an example in which the index is associated with power consumption and sensitivity. For example, index 0 may indicate no receiver installed. Index 1 is an example of power consumption of 0 and sensitivity of -20 dBm. Index 2 is an example of power consumption of 10 μW and sensitivity of −40 dBm.

Also, a new terminal operation that achieves low power consumption may be specified. For example, the following two operations may be defined.

Operation A) Only the operation of waiting for only a simple radio signal from the base station 10 is executed. For example, power may not be supplied (OFF) to a circuit used for normal communication (for example, a main circuit). For example, power may be supplied only to receivers that detect only simple radio signals from the base station 10 (ON). A receiver that waits for a simple radio signal may be always ON, or may wait for a simple radio signal discontinuously like eDRX (extended discontinuous reception).

Operation B) When the receiver receives a simple radio signal (hereinafter also referred to as "command") from the base station 10 and determines that the terminal 20 needs to wake up, even if the main circuit is turned on, good. Furthermore, the conventional terminal operation in the idle/inactive mode may be performed, or the newly defined terminal operation described later may be performed.

The operations shown in operation A) and/or operation B) above may be performed in an existing RRC state (eg idle/inactive mode) or may be performed in a newly defined RRC state. The newly defined RRC state is referred to as low power mode, but the name is not limited to this.

FIG. 4 is a diagram showing an example (1) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 4, when the terminal 20 that has transitioned to the low power mode receives the command once, it may determine that it has received the wake-up instruction or that it needs to wake up. may

FIG. 5 is a diagram showing an example (2) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 5 , the terminal 20 that has transitioned to the low power mode may determine that it has received a wake-up instruction when it receives commands a specific number of times within a specific period of time, or it may wake up. It may be determined that there is a need for

The specific period may be started based on the timing at which the first command is received, and may be called a determination period. The length of the determination period may be notified from the base station 10 to the terminal 20, or may be set in advance. Assuming that the specific number of times is the number of times of reception N, the number of times of reception N may be notified from the base station 10 to the terminal 20, may be changed by the base station 10, or may be set in advance. The length of the determination period and the number of receptions N are notified or updated from the base station 10 to the terminal 20 by SIB (System Information Block), DCI (Downlink Control Information), MAC-CE (Medium Access Control - Control Element) or RRC signaling. may be

FIG. 6 is a diagram showing an example (3) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 6, the terminal 20 that has transitioned to the low power mode may determine that it has received a wake-up instruction if any of the plurality of receivers has received the command, and may determine that it has received a wake-up instruction. It may be determined that there is The plurality of receivers may be receivers of the same type or receivers of different types.

If terminal 20 has receiver #1 and another receiver #2, as shown in FIG. If the receiver #2 receives the command within the reception timing period, the terminal 20 may determine that it has received the wake-up instruction or that it needs to wake up.

The length of the allowable reception timing period may be notified or updated from the base station 10 to the terminal 20 by SIB, DCI, MAC-CE or RRC signaling. Also, the length of the allowable reception timing period may be set in advance.

4, 5, or 6 may be executed by the terminal 20 transitioning to the low power mode, or the terminal 20 transitioning to the idle/inactive mode may be executed. may run. Note that the determination method according to FIG. 5 and the determination method according to FIG. 6 may be combined. For example, the determination period and the number of times of reception N may be set to apply to a plurality of receivers, and effective command reception may be limited to the allowable reception timing period. Note that events other than wakeup may be determined by command reception. Receipt of a command other than a wakeup may be determined in the manner described above.

FIG. 7 is a diagram showing an example (4) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 7, when terminal 20 receives a command and determines that it needs to wake up, it may perform the actions that terminal 20 performs in a conventional idle/inactive mode. For example, SSB, Channel State Information - Reference Signal (CSI-RS), Tracking Reference Signal (TRS), etc. may be used to perform time domain and/or frequency domain tracking. For example, as shown in FIG. 7, terminal 20 may track using SSB and attempt to receive paging on PO (Paging Occasion). Note that if a low power mode is specified, the terminal 20 may wait for commands in the low power mode.

FIG. 8 is a diagram showing an example (5) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 8 , when the terminal 20 receives a command and determines that it needs to wake up, a dedicated time-domain and/or frequency-domain tracking signal (hereinafter also referred to as “T/F tracking signal”) .) may be used to perform tracking. The PO may be the same as an existing PO, or may be a newly defined PO.

The dedicated T/F tracking signal may be an existing signal (SSB, CSI-RS, TRS, SRS (Sounding Reference Signal), DM-RS (Demodulation Reference Signal), etc.) or a new signal. may The dedicated T/F tracking signal may be transmitted periodically, or may be transmitted only when the base station 10 gives a wake-up instruction. Triggered by the base station 10 transmitting a wake-up instruction command, the base station 10 may transmit a dedicated T/F tracking signal just before the PO of the corresponding terminal 20 . For example, as shown in FIG. 8, terminal 20 may track using a dedicated T/F tracking signal and attempt to receive paging on the PO. Note that if a low power mode is specified, the terminal 20 may wait for commands in the low power mode.

FIG. 9 is a diagram showing an example (6) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 9, when terminal 20 receives a command and determines that it needs to wake up, terminal 20 may perform random access. That is, it may transition from an idle/inactive mode or a low power mode to a connected mode. For synchronization, SSB, CSI-RS, TRS, etc. transmitted from the base station 10 for synchronization may be used. The terminal 20 may synchronize using SSB and transmit a random access preamble to the base station 10 in RO (Random Access Occasion). Note that if a low power mode is specified, the terminal 20 may wait for commands in the low power mode.

FIG. 10 is a diagram showing an example (7) of wakeup operation according to the embodiment of the present invention. As shown in FIG. 10, when terminal 20 receives a command and determines that it needs to wake up, it may synchronize using the T/F tracking signal and perform wakeup on the RO. The RO may be the same as an existing RO, or may be a newly defined RO.

The dedicated T/F tracking signal may be an existing signal (SSB, CSI-RS, TRS, SRS, DM-RS, etc.) or a new signal. The dedicated T/F tracking signal may be transmitted periodically, or may be transmitted only when the base station 10 gives a wake-up instruction. Triggered by the base station 10 transmitting a wake-up instruction command, the base station 10 may transmit a dedicated T/F tracking signal just before the PO of the corresponding terminal 20 . For example, as shown in FIG. 10, terminal 20 may synchronize using a dedicated T/F tracking signal and transmit a random access preamble on the RO. Note that if a low power mode is specified, the terminal 20 may wait for commands in the low power mode.

The T / F tracking signal opportunity, which is an opportunity for the T / F tracking signal to be transmitted, may be set in advance, or notified from the base station 10 to the terminal 20 by SIB, DCI, MAC-CE or RRC signaling, or May be updated. For example, the T/F tracking signal opportunity may be available implicitly when the command is sent. The availability of the T/F tracking signal opportunity may be signaled from the base station 10 to the terminal 20 by SIB, DCI, MAC-CE or RRC signaling.

The resource location of a T/F tracking signal opportunity may be indicated by a time domain and/or frequency domain offset from a particular channel or a particular signal.

FIG. 11 is a diagram showing an example of time offsets according to an embodiment of the invention. As shown in FIG. 11, the T/F tracking signal opportunity may be set by an offset t _offset in the time domain from PO or RO.

FIG. 12 is a diagram showing an example of frequency offset according to the embodiment of the invention. As shown in FIG. 12, the T/F tracking signal opportunity may be set by an offset f _offset in the frequency domain from PO or RO.

FIG. 13 is a diagram showing an example (1) of mode transition according to the embodiment of the present invention. Low power mode may be operated in combination with existing RRC states. As shown in FIG. 13, a transition from the connected mode to the low power mode may be performed, and a transition from the low power mode to the connected mode may be performed. Also, as shown in FIG. 13, a transition from idle/inactive mode to low power mode may be performed, and a transition from low power mode to idle/inactive mode may be performed. Also, as shown in FIG. 13, a transition from the connected mode to the idle/inactive mode may be performed, or a transition from the idle/inactive mode to the connected mode may be performed.

FIG. 14 is a diagram showing an example (2) of mode transition according to the embodiment of the present invention. As shown in FIG. 14 , when transitioning from the connected mode to the low power mode or the idle/inactive mode, the transition conditions or transition operations of 1) to 4) shown below may be used.

1) The RRC state of the transition destination may be notified from the base station 10 to the terminal 20 by a message (for example, RRC connection release) when transitioning from the connected mode. For example, the base station 10 may decide whether to transition to low power mode or idle/inactive mode based on previous measurements. The base station 10 may also decide whether to transition to low power mode or idle/inactive mode based on the content of the UE capabilities. The base station 10 may also decide whether to transition to low power mode or idle/inactive mode based on previous measurements and UE capabilities.

2) When transitioning from the connected mode, whether to transition to the low power mode or the idle/inactive mode may be defined by the specifications, or may be notified from the base station 10 to the terminal 20 in advance. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

3) When transitioning from the connected mode, the base station 10 may notify the terminal 20 of a threshold for determining whether to transition to the low power mode or the idle/inactive mode. The terminal 20 may report the RRC state of the transition destination to the base station 10 . The threshold may be a threshold related to the measurement result, or may be a threshold related to the location information of the UE. For example, a threshold may be set to transition to a low power mode when the measurement results are relatively good, and transition to an idle/inactive mode when the measurement results are relatively poor.

4) If the timer expires, it may transition from connected mode to either low power mode or idle/inactive mode. For example, a timer may be started when transitioning to connected mode. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

FIG. 15 is a diagram showing an example (3) of mode transition according to the embodiment of the present invention. As shown in FIG. 15 , when transitioning from the low power mode to the connected mode, 1) or 2) shown below may be transition conditions or transition operations.

1) When the terminal 20 receives a wake-up command from the base station 10, the terminal 20 may transition from the low power mode to the connected mode. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

2) If the timer expires, it may transition from low power mode to connected mode. For example, a timer may be started when transitioning to a low power mode. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

FIG. 16 is a diagram showing an example (4) of mode transition according to the embodiment of the present invention. As shown in FIG. 16, when transitioning from the idle/inactive mode to the low power mode, the following 1)-3) may be transition conditions or transition actions.

1) Terminal 20 may use measurements to transition from idle/inactive mode to low power mode when a threshold is exceeded. A reference signal used for measurement may be an existing signal (SSB, TRS, CSI-RS, SRS, DM-RS, etc.) or a new signal. References for measurement results may be parameters such as RSRP (Reference Signal Received Power), SINR (Signal-to-Interference plus Noise Ratio), RSSI (Received Signal Strength Indicator), RSRQ (Reference Signal Received Quality).

The threshold may be notified or changed to the base station 10, or may be set in advance. The threshold may be notified from the base station 10 to the terminal 20 by DCI, MAC-CE or RRC signaling. For example, if the measured RSRP, SINR, RSSI and/or RSRQ are above certain thresholds, an idle/inactive mode may be transitioned to a low power mode. For example, start a timer when the measured RSRP, SINR, RSSI and/or RSRQ exceeds a certain threshold, and transition from idle/inactive mode to low power mode if the timer expires while remaining above the threshold. may Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

2) Terminal 20 may be notified to transition from idle/inactive mode to low power mode via a paging message and/or a paging early indication.

3) If the timer expires, terminal 20 may transition from idle/inactive mode to low power mode. A timer may be started when transitioning to idle/inactive mode. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

Also, as shown in FIG. 16, when transitioning from the low power mode to the idle/inactive mode, the transition conditions or operations of 1) to 5) shown below may be used.

1) If the timer expires, terminal 20 may transition from low power mode to idle/inactive mode. A timer may be started when transitioning to a low power mode. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

2) Terminal 20 may transition from low power mode to idle/inactive mode when the energy harvested power value is less than the power consumed by the receiver. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

3) Terminal 20 may transition from low power mode to idle/inactive mode based on the measurement results. For example, a low power mode may transition to an idle/inactive mode when relatively poor measurement results occur. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

4) Terminal 20 may transition from low power mode to idle/inactive mode based on timers and measurements. For example, a timer may be started when transitioning to a low power mode. If the measurement results exceed the threshold, the timer may be reset and restarted. Terminal 20 may transition from low power mode to idle/inactive mode when the timer expires. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

5) Upon receiving a wake-up indication from the base station 10, the terminal 20 may transition from low power mode to idle/inactive mode.

FIG. 17 is a diagram showing an example (5) of mode transition according to the embodiment of the present invention. The terminal 20 may perform an operation to check whether it can receive a command from the base station 10 . The terminal 20 may perform the operation shown in FIG. 17 to check whether it can receive commands from the base station 10 in low power mode or in idle/inactive mode. For example, as shown in FIG. 17, a specific period is set as a measurement window, and the base station 10 executes command transmission within the measurement window. If the terminal 20 does not receive a predetermined number of commands or more within the measurement window, the terminal 20 may determine that accurate command reception is not possible and transition to idle/inactive mode. On the other hand, if the terminal 20 receives a predetermined number of commands or more within the measurement window, it may determine that it is possible to receive commands accurately, and transition to the low power mode.

The terminal 20 may not recognize commands received within the measurement window as wake-up instructions. The number of commands to be transmitted, command intervals, measurement window length and cycle may be notified or changed in advance by the base station 10, or may be set in advance. The base station 10 may notify the terminal 20 of part or all of the number of commands, command intervals, measurement window lengths and periods transmitted by DCI, MAC-CE, RRC signaling or SIB.

If the number of commands that could not be received within the measurement window exceeds the threshold, it may transition to idle/inactive mode, and if it does not exceed the threshold, it may transition to low power mode. Also, if the number of commands received within the measurement window exceeds a threshold, it may transition to low power mode, and if not, it may transition to idle/inactive mode. The threshold may be notified or changed in advance by the base station 10, or may be set in advance. The base station 10 may notify the terminal 20 of the threshold by DCI, MAC-CE, RRC signaling or SIB. FIG. 17 shows that the command is transmitted from the base station 10 five times within the measurement window, and the terminal 20 transitions to the low power mode if it can be received five times, and the idle/inactive mode if it can be received only once. This is an example of transitioning to

FIG. 18 is a diagram showing an example (1) of operation switching according to the embodiment of the present invention. As shown in FIG. 18, when UE operation 1 and UE operation 2 are performed in idle/inactive mode, when transitioning from connected mode to idle/inactive mode, 1)-4) shown below are It may be a condition or action to switch the UE behavior.

1) The UE operation may be notified from the base station 10 to the terminal 20 by a message (for example, RRC connection release) when transitioning from the connected mode. For example, the base station 10 may decide whether to transition to UE behavior 1 or UE behavior 2 based on the last measurement result. Also, the base station 10 may determine whether to transition to UE behavior 1 or UE behavior 2 based on the contents of the UE capabilities. Also, the base station 10 may decide whether to transition to UE behavior 1 or UE behavior 2 based on the previous measurement results and UE capabilities.

2) When transitioning from the connected mode, whether to transition to UE operation 1 or UE operation 2 may be defined by the specifications, or may be notified from the base station 10 to the terminal 20 in advance.

3) When transitioning from the connected mode, the base station 10 may notify the terminal 20 of a threshold for determining whether to transition to the UE operation 1 or the UE operation 2 . Terminal 20 may determine the UE behavior based on the threshold and report the determined UE behavior to base station 10 . The threshold may be a threshold related to the measurement result, or may be a threshold related to the location information of the UE. For example, a threshold may be set to transition to UE operation 1 when the measurement result is relatively good, and to transition to UE operation 2 when the measurement result is relatively poor.

4) If the timer expires, the connected mode may transition to either UE behavior 1 or UE behavior 2. For example, a timer may be started when transitioning to connected mode.

Also, as shown in FIG. 19, when transitioning from the idle/inactive mode of UE operation 1 to the connected mode, 1) or 2) shown below may be transition conditions or transition operations.

1) When the terminal 20 receives a wake-up command from the base station 10, the terminal 20 may transition from the UE operation 1 to the connected mode. Terminal 20 may transition from UE operation 1 to connected mode in the manner described using FIGS. 7 to 10 .

2) If the timer expires, the UE may transition from behavior 1 to connected mode. For example, a timer may be started when transitioning to UE behavior 1 . Terminal 20 may transition from UE operation 1 to connected mode in the manner described using FIGS. 7 to 10 .

FIG. 19 is a diagram showing an example (2) of operation switching according to the embodiment of the present invention. As shown in FIG. 19, when transitioning from UE behavior 2 to UE behavior 1 in idle/inactive mode, 1)-3) shown below may be transition conditions or transition behaviors.

1) Terminal 20 may use the measurement results to transition to UE behavior 1 in idle/inactive mode if a threshold is exceeded. A reference signal used for measurement may be an existing signal (SSB, TRS, CSI-RS, SRS, DM-RS, etc.) or a new signal. The measurement result criteria may be parameters such as RSRP, SINR, RSSI, RSRQ.

The threshold may be notified or changed to the base station 10, or may be set in advance. The threshold may be notified from the base station 10 to the terminal 20 by DCI, MAC-CE or RRC signaling. For example, if the measured RSRP, SINR, RSSI and/or RSRQ are above certain thresholds, the UE may transition to behavior 1 in idle/inactive mode. For example, start a timer when the measured RSRP, SINR, RSSI and/or RSRQ exceeds a certain threshold, and transition to UE behavior 1 in idle/inactive mode if the timer expires while remaining above the threshold. may Also, the terminal 20 may notify the base station 10 of information indicating that the terminal 20 has switched to the UE operation 1 .

2) Terminal 20 may be informed to transition to UE behavior 1 in idle/inactive mode via a paging message and/or a paging early indication.

3) If the timer expires, terminal 20 may transition to UE action 1 in idle/inactive mode. A timer may be started when transitioning to idle/inactive mode.

Also, as shown in FIG. 19, when transitioning from UE behavior 1 to UE behavior 2 in idle/inactive mode, 1) to 5) shown below may be transition conditions or transition behaviors .

1) Terminal 20 may transition to UE behavior 2 in idle/inactive mode based on the measurement results. For example, it may transition to UE behavior 2 in idle/inactive mode when relatively poor measurement results.

2) Terminal 20 may transition to UE behavior 2 in idle/inactive mode if the power value from energy harvesting is less than the power consumed by the receiver.

3) Terminal 20 may transition to UE operation 2 in idle/inactive mode if the timer expires. A timer may be started when transitioning to a low power mode. Also, when the RRC state transitions, the terminal 20 may notify the base station 10 of the RRC state of the transition destination.

4) Based on timers and measurement results, terminal 20 may transition to UE action 2 in idle/inactive mode. For example, a timer may be started when transitioning to UE behavior 1 . If the measurement results exceed the threshold, the timer may be reset and restarted. Terminal 20 may transition from UE behavior 1 to UE behavior 2 in idle/inactive mode if the timer expires.

5) Upon receiving a wake-up indication from the base station 10, the terminal 20 may transition to UE behavior 2 in idle/inactive mode.

FIG. 20 is a diagram showing an example (3) of operation switching according to the embodiment of the present invention. The terminal 20 may perform an operation to check whether it can receive a command from the base station 10 . The terminal 20 may execute the operation of confirming whether or not a command from the base station 10 shown in FIG. 20 can be received in the state of the UE operation 1 in idle/inactive mode, It may be executed in the state of operation 2. For example, as shown in FIG. 20, a specific period is set as a measurement window, and the base station 10 executes command transmission within the measurement window. If the terminal 20 does not receive more than a predetermined number of commands within the measurement window, the terminal 20 may determine that accurate command reception is not possible and transition to UE operation 2 in idle/inactive mode. On the other hand, when the terminal 20 receives more than a predetermined number of commands within the measurement window, it may determine that it is possible to receive commands correctly, and may transition to UE operation 1 in idle/inactive mode.

The terminal 20 may not recognize commands received within the measurement window as wake-up instructions. The number of commands to be transmitted, command intervals, measurement window length and cycle may be notified or changed in advance by the base station 10, or may be set in advance. The base station 10 may notify the terminal 20 of part or all of the number of commands, command intervals, measurement window lengths and periods transmitted by DCI, MAC-CE, RRC signaling or SIB.

If the number of commands not received within the measurement window exceeds the threshold, transition to UE behavior 2 in idle/inactive mode, otherwise transition to UE behavior 1 in idle/inactive mode. may Also, if the number of commands received within the measurement window exceeds the threshold, transition to UE behavior 1 in idle/inactive mode, otherwise transition to UE behavior 2 in idle/inactive mode. You may The threshold may be notified or changed in advance by the base station 10, or may be set in advance. The base station 10 may notify the terminal 20 of the threshold by DCI, MAC-CE, RRC signaling or SIB. FIG. 20 shows that the command is transmitted from the base station 10 five times within the measurement window, and the terminal 20 transitions to the low power mode if it can be received five times, and the idle/inactive mode if it can be received only once. This is an example of transitioning to

According to the above-described embodiment, the terminal 20 can reduce power consumption related to paging reception by executing appropriate state transitions and monitoring operations in consideration of terminal conditions such as receiver performance and propagation environment.

That is, in a wireless communication system, power consumption in monitoring operations can be reduced.

(Device configuration)
Next, functional configuration examples of the base station 10 and the terminal 20 that execute the processes and operations described above will be described. The base stations 10 and terminals 20 contain the functionality to implement the embodiments described above. However, each of the base station 10 and terminal 20 may have only part of the functions in the embodiment.

<Base station 10>
FIG. 21 is a diagram showing an example of the functional configuration of base station 10 according to the embodiment of the present invention. As shown in FIG. 21, the base station 10 has a transmitting section 110, a receiving section 120, a setting section 130, and a control section 140. The functional configuration shown in FIG. 21 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.

The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 side and wirelessly transmitting the signal. The transmitter 110 also transmits inter-network-node messages to other network nodes. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals. Also, the transmitting unit 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signals, etc. to the terminal 20 . The receiving unit 120 also receives inter-network node messages from other network nodes.

The setting unit 130 stores preset setting information and various setting information to be transmitted to the terminal 20 . The content of the setting information is, for example, information related to paging setting.

The control unit 140 controls paging transmission as described in the embodiment. A functional unit related to signal transmission in control unit 140 may be included in transmitting unit 110 , and a functional unit related to signal reception in control unit 140 may be included in receiving unit 120 .

<Terminal 20>
FIG. 22 is a diagram showing an example of the functional configuration of terminal 20 according to the embodiment of the present invention. As shown in FIG. 22 , the terminal 20 has a transmitter 210 , a receiver 220 , a setter 230 and a controller 240 . The functional configuration shown in FIG. 22 is merely an example. As long as the operation according to the embodiment of the present invention can be executed, the functional division and the names of the functional units may be arbitrary.

The transmission unit 210 creates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 wirelessly receives various signals and acquires a higher layer signal from the received physical layer signal. Also, the receiving unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals and the like transmitted from the base station 10 . Further, for example, the transmission unit 210, as D2D communication, to the other terminal 20, PSCCH (Physical Sidelink Control Channel), PSSCH (Physical Sidelink Shared Channel), PSDCH (Physical Sidelink Discovery Channel), PSBCH (Physical Sidelink Broadcast Channel) etc., and the receiving unit 220 receives PSCCH, PSSCH, PSDCH, PSBCH, or the like from other terminals 20 .

The setting unit 230 stores various setting information received from the base station 10 by the receiving unit 220 . The setting unit 230 also stores preset setting information. The content of the setting information is, for example, information related to paging setting.

The control unit 240 performs control related to paging reception, as described in the embodiment. A functional unit related to signal transmission in control unit 240 may be included in transmitting unit 210 , and a functional unit related to signal reception in control unit 240 may be included in receiving unit 220 .

(Hardware configuration)
The block diagrams (FIGS. 21 and 22) used to describe the above embodiments show blocks in functional units. These functional blocks (components) are realized by any combination of at least one of hardware and software. Also, the method of implementing each functional block is not particularly limited. That is, each functional block may be implemented using one device that is physically or logically coupled, or directly or indirectly using two or more devices that are physically or logically separated (e.g. , wired, wireless, etc.) and may be implemented using these multiple devices. A functional block may be implemented by combining software in the one device or the plurality of devices.

Functions include judging, determining, determining, calculating, calculating, processing, deriving, investigating, searching, checking, receiving, transmitting, outputting, accessing, resolving, selecting, choosing, establishing, comparing, assuming, expecting, assuming, Broadcasting, notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc. can't For example, a functional block (component) that performs transmission is called a transmitting unit or transmitter. In either case, as described above, the implementation method is not particularly limited.

For example, the base station 10, the terminal 20, etc. according to the embodiment of the present disclosure may function as a computer that performs processing of the wireless communication method of the present disclosure. FIG. 23 is a diagram illustrating an example of a hardware configuration of base station 10 and terminal 20 according to an embodiment of the present disclosure. The base station 10 and terminal 20 described above are 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, and the like. good too.

In the following explanation, the term "apparatus" can be read as a circuit, device, unit, or the like. The hardware configuration of the base station 10 and terminal 20 may be configured to include one or more of each device shown in the figure, or may be configured without some devices.

Each function of the base station 10 and the terminal 20 is performed by the processor 1001 performing calculations and controlling communication by the communication device 1004 by loading predetermined software (programs) onto hardware such as the processor 1001 and the storage device 1002. or by controlling at least one of data reading and writing in the storage device 1002 and the auxiliary storage device 1003 .

The processor 1001, for example, operates an operating system and controls the entire computer. The processor 1001 may be configured with a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, registers, and the like. For example, the control unit 140 , the control unit 240 and the like described above may be implemented by the processor 1001 .

In addition, 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 to the storage device 1002, and executes various processes according to them. As the program, a program that causes a computer to execute at least part of the operations described in the above embodiments is used. For example, control unit 140 of base station 10 shown in FIG. 21 may be implemented by a control program stored in storage device 1002 and operated by processor 1001 . Also, for example, the control unit 240 of the terminal 20 shown in FIG. 22 may be implemented by a control program stored in the storage device 1002 and operated by the processor 1001 . Although it has been explained that the above-described various processes are executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. FIG. Processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via an electric communication line.

The storage device 1002 is a computer-readable recording medium, for example, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), etc. may be configured. The storage device 1002 may also be called a register, cache, main memory (main storage device), or the like. The storage device 1002 can store executable programs (program code), software modules, etc. for implementing a communication method according to an embodiment of the present disclosure.

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

The communication device 1004 is hardware (transmitting/receiving device) for communicating between computers via at least one of a wired network and a wireless network, and is also called a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize at least one of, for example, frequency division duplex (FDD) and time division duplex (TDD). may consist of For example, a transmitting/receiving antenna, an amplifier section, a transmitting/receiving section, a transmission line interface, etc. may be implemented by the communication device 1004 . The transceiver may be physically or logically separate implementations for the transmitter and receiver.

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

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 devices.

In addition, the base station 10 and the terminal 20 include hardware such as microprocessors, digital signal processors (DSPs), ASICs (Application Specific Integrated Circuits), PLDs (Programmable Logic Devices), and FPGAs (Field Programmable Gate Arrays). , and part or all of each functional block may be implemented by the hardware. For example, processor 1001 may be implemented using at least one of these pieces of hardware.

(Summary of embodiment)
As described above, according to the embodiment of the present invention, the receiving unit for receiving a simple radio signal and the operation for receiving a normal radio signal when the simple radio signal is received are described above. a control unit for initiating a receiving unit, said receiving unit receiving said normal radio signal to receive paging.

With the above configuration, the terminal 20 can reduce power consumption related to paging reception by executing appropriate state transitions and monitoring operations in consideration of terminal conditions such as receiver performance and propagation environment. That is, it is possible to reduce power consumption in the monitoring operation in the wireless communication system.

The receiving unit may receive the simple radio signal with lower power consumption than receiving the normal radio signal. With this configuration, the terminal 20 can reduce power consumption related to paging reception by executing the monitoring operation as necessary.

The normal signal may include a signal used for tracking or synchronization. With this configuration, the terminal 20 can reduce power consumption related to paging reception by executing the monitoring operation as necessary.

The control unit may transition between the state of receiving the simple radio signal and the state of receiving the normal radio signal based on a measurement result. With this configuration, the terminal 20 can reduce power consumption related to paging reception by executing appropriate state transitions and monitoring operations in consideration of terminal conditions such as the propagation environment.

The receiving unit may further include a transmitting unit that transmits a random access preamble at a random access opportunity identified by receiving the normal radio signal. With this configuration, the terminal 20 can reduce power consumption related to connected mode transition by executing the monitoring operation as necessary.

Further, according to the embodiment of the present invention, a reception procedure for receiving a simple radio signal, a control procedure for starting an operation of receiving a normal radio signal when the simple radio signal is received, A communication method is provided in which the terminal executes the procedure of receiving the normal radio signal and receiving the paging.

With the above configuration, the terminal 20 can reduce power consumption related to paging reception by executing appropriate state transitions and monitoring operations in consideration of terminal conditions such as receiver performance and propagation environment. That is, it is possible to reduce power consumption in the monitoring operation in the wireless communication system.

(Supplement to 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 can understand various modifications, modifications, alternatives, replacements, and the like. be. Although specific numerical examples have been used to facilitate understanding of the invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The division of items in the above description is not essential to the present invention, and the items described in two or more items may be used in combination as necessary, and the items described in one item may be used in another item. may apply (unless inconsistent) to the matters set forth in Boundaries of functional or processing units in functional block diagrams do not necessarily correspond to boundaries of physical components. The operations of a plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components. As for the processing procedures described in the embodiments, the processing order may be changed as long as there is no contradiction. Although the base station 10 and the terminal 20 have been described using functional block diagrams for convenience of explanation of processing, such devices may be implemented in hardware, software, or a combination thereof. The software operated by the processor of the base station 10 according to the embodiment of the present invention and the software operated by the processor of the terminal 20 according to the embodiment of the present invention are stored in random access memory (RAM), flash memory, read-only memory, respectively. (ROM), EPROM, EEPROM, register, hard disk (HDD), removable disk, CD-ROM, database, server, or any other appropriate storage medium.

Also, notification of information is not limited to the aspects/embodiments described in the present disclosure, and may be performed using other methods. For example, notification of information includes physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof.In addition, RRC signaling may also be called an RRC message, for example, RRC It may be a connection setup (RRC Connection Setup) message, an RRC connection reconfiguration message, or the like.

Each aspect/embodiment described in the present disclosure includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4th generation mobile communication system), 5G (5th generation mobile communication system) system), FRA (Future Radio Access), NR (new Radio), 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 802.20, UWB (Ultra-WideBand), Bluetooth (registered trademark), and other suitable systems and extended It may be applied to at least one of the next generation systems. Also, a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G, etc.).

The order of the processing procedures, sequences, flowcharts, etc. of each aspect/embodiment described in this specification may be changed as long as there is no contradiction. For example, the methods described in this disclosure present elements of the various steps using a sample order, and are not limited to the specific order presented.

A specific operation performed by the base station 10 in this specification may be performed by its upper node in some cases. In a network consisting of one or more network nodes with base station 10, various operations performed for communication with terminal 20 may be performed by base station 10 and other network nodes other than base station 10 ( (eg, but not limited to MME or S-GW). Although the case where there is one network node other than the base station 10 is illustrated above, the other network node may be a combination of a plurality of other network nodes (for example, MME and S-GW). .

Information, signals, etc. described in the present disclosure may be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). It may be input and output via multiple network nodes.

Input/output information may be stored in a specific location (for example, memory) or managed using a management table. Input/output information and the like can be overwritten, updated, or appended. The output information and the like may be deleted. The entered information and the like may be transmitted to another device.

The determination in the present disclosure may be performed by a value represented by 1 bit (0 or 1), may be performed by a boolean value (Boolean: true or false), or may be performed by comparing numerical values (e.g. , comparison with a predetermined value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description language or otherwise, includes instructions, instruction sets, code, code segments, program code, programs, subprograms, and software modules. , applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may be transmitted and received via a transmission medium. For example, the software uses at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and wireless technology (infrared, microwave, etc.) to website, Wired and/or wireless technologies are included within the definition of transmission medium when sent from a server or other remote source.

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 refer to voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. may be represented by a combination of

The 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, the channel and/or symbols may be signaling. A signal may also be a message. A component carrier (CC) may also be called a carrier frequency, a cell, a frequency carrier, or the like.

The terms "system" and "network" used in this disclosure are used interchangeably.

In addition, 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. may be represented. For example, radio resources may be indexed.

The names used for the parameters described above are not restrictive names in any respect. Further, the formulas, etc., using these parameters may differ from those expressly disclosed in this disclosure. Since the various channels (e.g., PUCCH, PDCCH, etc.) and information elements can be identified by any suitable name, the various names assigned to these various channels and information elements are in no way restrictive names. is not.

In the present disclosure, "base station (BS)", "radio base station", "base station device", "fixed station", "NodeB", "eNodeB (eNB)", "gNodeB (gNB)", "access point", "transmission point", "reception point", "transmission/reception point", "cell", "sector", Terms such as "cell group," "carrier," and "component carrier" may be used interchangeably. A base station may also be referred to by terms such as macrocell, small cell, femtocell, picocell, and the like.

A base station can accommodate one or more (eg, three) cells. When a base station accommodates multiple cells, the overall coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being associated with a base station subsystem (e.g., an indoor small base station (RRH: The term "cell" or "sector" refers to part or all of the coverage area of at least one of the base stations and base station subsystems serving communication services in this coverage. point to

In the present disclosure, terms such as "Mobile Station (MS)", "user terminal", "User Equipment (UE)", "terminal", etc. may be used interchangeably. .

A mobile station is defined 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 It may also be called a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.

At least one of the base station and mobile station may be called a transmitting device, a receiving device, a communication device, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile object, the mobile object itself, or the like. The mobile object may be a vehicle (e.g., car, airplane, etc.), an unmanned mobile object (e.g., drone, self-driving car, etc.), or a robot (manned or unmanned ). Note that at least one of the base station and the mobile station includes devices that do not necessarily move during communication operations. For example, at least one of the base station and mobile station may be an IoT (Internet of Things) device such as a sensor.

Also, the base station in the present disclosure may be read as a user terminal. For example, communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, D2D (Device-to-Device), V2X (Vehicle-to-Everything), etc.) Regarding the configuration, each aspect/embodiment of the present disclosure may be applied. In this case, the terminal 20 may have the functions of the base station 10 described above. Also, words such as "up" and "down" may be replaced with words corresponding to inter-terminal communication (for example, "side"). For example, uplink channels, downlink channels, etc. may be read as side channels.

Similarly, user terminals in the present disclosure may be read as base stations. In this case, the base station may have the functions that the above-described user terminal has.

The terms "determining" and "determining" used in this disclosure may encompass a wide variety of actions. "Judgement" and "determination" are, for example, judging, calculating, computing, processing, deriving, investigating, looking up, searching, inquiring (eg, lookup in a table, database, or other data structure), ascertaining as "judged" or "determined", and the like. Also, "judgment" and "determination" are used for receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, access (accessing) (for example, accessing data in memory) may include deeming that a "judgement" or "decision" has been made. In addition, "judgment" and "decision" are considered to be "judgment" and "decision" by resolving, selecting, choosing, establishing, comparing, etc. can contain. In other words, "judgment" and "decision" can include considering that some action is "judgment" and "decision". Also, "judgment (decision)" may be read as "assuming", "expecting", "considering", or the like.

The terms "connected", "coupled", or any variation thereof, mean any direct or indirect connection or coupling between two or more elements, It can include the presence of one or more intermediate elements between two elements being "connected" or "coupled." Couplings or connections between elements may be physical, logical, or a combination thereof. For example, "connection" may be read as "access". As used in this disclosure, two elements are defined using at least one of one or more wires, cables, and printed electrical connections and, as some non-limiting and non-exhaustive examples, in the radio frequency domain. , electromagnetic energy having wavelengths in the microwave and optical (both visible and invisible) regions, and the like.

The reference signal can also be abbreviated as RS (Reference Signal), and may also be called Pilot depending on the applicable standard.

The term "based on" as used in this disclosure does not mean "based only on" unless otherwise specified. In other words, the phrase "based on" means both "based only on" and "based at least on."

Any reference to elements using the "first," "second," etc. designations used in this disclosure 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, reference to a first and second element does not imply that only two elements can be employed or that the first element must precede the second element in any way.

"Means" in the configuration of each device described above may be replaced with "unit", "circuit", "device", or the like.

Where "include," "including," and variations thereof are used in this disclosure, these terms are inclusive, as is the term "comprising." is intended. Furthermore, the term "or" as used in this disclosure is not intended to be an exclusive OR.

A radio frame may consist of one or more frames in the time domain. Each frame or frames in the time domain may be referred to as a subframe. A subframe may also consist of one or more slots in the time domain. A subframe may be of a fixed length of time (eg, 1 ms) independent of numerology.

A numerology may be a communication parameter that applies to the transmission and/or reception of a signal or channel. Numerology, for example, subcarrier spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, radio frame configuration, transceiver It may indicate at least one of certain filtering operations performed in the frequency domain, certain windowing operations performed by the transceiver in the time domain, and/or the like.

A slot may consist of one or more symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain. A slot may be a unit of time based on numerology.

A slot may contain multiple mini-slots. Each minislot may consist of one or more symbols in the time domain. A minislot may also be referred to as a subslot. A minislot may consist of fewer symbols than a slot. PDSCH (or PUSCH) transmitted in time units larger than minislots may be referred to as PDSCH (or PUSCH) mapping type A. PDSCH (or PUSCH) transmitted using minislots may be referred to as PDSCH (or PUSCH) mapping type B.

Radio frames, subframes, slots, minislots and symbols all represent time units when transmitting signals. Radio frames, subframes, slots, minislots and symbols may be referred to by other corresponding designations.

For example, one subframe may be called a Transmission Time Interval (TTI), a plurality of consecutive subframes may be called a TTI, and one slot or one minislot may be called a TTI. may That is, at least one of the subframe and TTI may be a subframe (1 ms) in existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms may be Note that the unit representing the TTI may be called a slot, mini-slot, or the like instead of a subframe.

Here, TTI refers to, for example, the minimum scheduling time unit in wireless communication. For example, in the LTE system, the base station performs scheduling to allocate radio resources (frequency bandwidth, transmission power, etc. that can be used by each terminal 20) to each terminal 20 on a TTI basis. Note that the definition of TTI is not limited to this.

A TTI may be a transmission time unit such as a channel-encoded data packet (transport block), code block, or codeword, or may be a processing unit such as scheduling and link adaptation. Note that when a TTI is given, the time interval (for example, the number of symbols) in which transport blocks, code blocks, codewords, etc. are actually mapped may be shorter than the TTI.

When one slot or one minislot is called a TTI, one or more TTIs (that is, one or more slots or one or more minislots) may be the minimum scheduling time unit. Also, the number of slots (the number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.

A TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), normal TTI, long TTI, normal subframe, normal subframe, long subframe, slot, or the like. A TTI that is shorter than a normal TTI may be called a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a minislot, a subslot, a slot, and the like.

Note that the long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and the short TTI (e.g., shortened TTI, etc.) is less than the TTI length of the long TTI and 1 ms A TTI having the above TTI length may be read instead.

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

Also, the time domain of an RB may include one or more symbols and may be 1 slot, 1 minislot, 1 subframe, or 1 TTI long. One TTI, one subframe, etc. may each consist of one or more resource blocks.

One or more RBs are physical resource blocks (PRBs), sub-carrier groups (SCGs), resource element groups (REGs), PRB pairs, RB pairs, etc. may be called.

Also, a resource block may be composed of one or more resource elements (RE: Resource Element). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

A bandwidth part (BWP) (which may also be called a bandwidth part) may represent a subset of contiguous common resource blocks (RBs) for a certain numerology on a certain carrier. Here, the common RB may be identified by an RB index based on the common reference point of the carrier. PRBs may be defined in a BWP and numbered within that BWP.

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

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 "cell", "carrier", etc. in the present disclosure may be read as "BWP".

The structures such as radio frames, subframes, slots, minislots and symbols described above are only examples. For example, the number of subframes contained in a radio frame, the number of slots per subframe or radio frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, the number of Configurations such as the number of subcarriers, the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, etc. can be varied.

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

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 that "A and B are different from C". Terms such as "separate," "coupled," etc. may also be interpreted in the same manner as "different."

Each aspect/embodiment described in the present disclosure may be used alone, may be used in combination, or may be used by switching along with execution. In addition, the notification of predetermined information (for example, notification of “being X”) is not limited to being performed explicitly, but may be performed implicitly (for example, not notifying the predetermined information). good too.

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 in the present disclosure. The present disclosure can be practiced with modifications and variations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the description of the present disclosure is for illustrative purposes and is not meant to be limiting in any way.

10 base station 110 transmitting unit 120 receiving unit 130 setting unit 140 control unit 20 terminal 210 transmitting unit 220 receiving unit 230 setting unit 240 control unit 1001 processor 1002 storage device 1003 auxiliary storage device 1004 communication device 1005 input device 1006 output device

Claims (6)

a receiver that receives a simple radio signal;
A control unit that causes the receiving unit to start an operation of receiving a normal wireless signal when the simple wireless signal is received,
The receiving unit is a terminal that receives the normal radio signal and receives paging. The terminal according to claim 1, wherein the receiving unit receives the simple radio signal with lower power consumption than receiving the normal radio signal. The terminal according to claim 1, wherein the normal signals include signals used for tracking or synchronization. The terminal according to claim 1, wherein the control unit transitions between the state of receiving the simple radio signal and the state of receiving the normal radio signal based on a measurement result. The terminal according to claim 1, further comprising a transmitting section that transmits a random access preamble at a random access opportunity identified by said receiving section receiving said normal radio signal. a reception procedure for receiving a simple radio signal;
A control procedure for starting an operation of receiving a normal radio signal when the simple radio signal is received;
A communication method in which a terminal executes a procedure of receiving the normal radio signal and receiving the paging.

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