CN111567007B

CN111567007B - User terminal and wireless communication method

Info

Publication number: CN111567007B
Application number: CN201880086210.3A
Authority: CN
Inventors: 武田和晃; 武田大树
Original assignee: NTT Docomo Inc
Current assignee: NTT Docomo Inc
Priority date: 2018-01-11
Filing date: 2018-01-11
Publication date: 2024-03-12
Anticipated expiration: 2038-01-11
Also published as: WO2019138503A1; CN111567007A

Abstract

The power consumption of the user terminal is suppressed in a future wireless communication system. The user terminal has: a reception unit that receives a predetermined signal using one of periodic radio resources that are time-multiplexed or frequency-multiplexed with at least one of a downlink shared channel, a control resource set including a downlink control channel that schedules the downlink shared channel, and a synchronization signal block; and a control unit that controls reception of the downlink control channel in response to reception of the prescribed signal.

Description

User terminal and wireless communication method

Technical Field

The present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system.

Background

In UMTS (Universal Mobile Telecommunications System ) networks, long term evolution (LTE: long Term Evolution) has been standardized for the purpose of further high-speed data rates, low latency, and the like (non-patent document 1). Further, for the purpose of further increasing capacity and height of LTE (LTE rel.8, 9), LTE-a (LTE Advanced, LTE rel.10, 11, 12, 13) is standardized.

Subsequent systems of LTE (e.g., also referred to as FRA (Future Radio Access, future Radio access), 5G (5 th generation mobile communication system, fifth generation mobile communication system), 5g+ (plus), NR (New Radio), NX (New Radio access), FX (Future generation Radio access, next generation Radio access), LTE rel.14 or 15 later, and the like are also being studied.

In existing LTE systems (e.g., LTE rel.8-13), a User terminal (UE: user Equipment) detects a Synchronization signal (SS: synchronization signal, e.g., including PSS (Primary Synchronization Signal), primary Synchronization signal) and/or SSs (Secondary Synchronization Signal )) through an initial connection (also referred to as cell search, etc.) procedure, acquires Synchronization with a network (e.g., base station (eNode B)), and identifies (e.g., identifies) a connected cell according to a cell ID (Identifier).

In addition, in the existing LTE system (e.g., LTE rel.8-13), in order to reduce power consumption of a user terminal, an operation of intermittent reception (DRX: discontinuous Reception) is supported in an idle mode. Furthermore, the user terminal in idle state controls RSRP/RSRQ measurement for cell reselection, monitoring/reception of a Paging Channel (PCH), etc., based on a DRX cycle (cycle). Incoming calls, changes in broadcast information (system information), ETWS, and the like are notified to the user terminal via a Paging channel (Paging channel).

Prior art literature

Non-patent literature

Non-patent document 1:3GPP TS 36.300V8.12.0"Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); overall description; stage 2 (Release 8) ", 4 th 2010

Disclosure of Invention

Problems to be solved by the invention

In future wireless communication systems (e.g., NR or 5G), it is being studied to define signal blocks (also referred to as SS/PBCH blocks or SS/PBCH blocks, etc.) containing synchronization signals (also referred to as SS, PSS, and/or SSs, or NR-PSS, NR-SSs, etc.) and broadcast channels (also referred to as broadcast signals, PBCH, or NR-PBCH, etc.). In addition, it is being studied to define radio resources (also referred to as control resource blocks, CORESET, etc.) for downlink control channels.

Since the user terminal monitors such a signal structure, there is a concern that the power consumption of the user terminal increases.

The present invention has been made in view of the above, and an object thereof is to provide a user terminal and a wireless communication method capable of suppressing power consumption of the user terminal in a future wireless communication system.

Means for solving the problems

A user terminal according to an aspect of the present invention includes: a reception unit that receives a predetermined signal using one of periodic radio resources that are time-multiplexed or frequency-multiplexed with at least one of a downlink shared channel, a control resource set including a downlink control channel that schedules the downlink shared channel, and a synchronization signal block; and a control unit that controls reception of the downlink control channel in response to reception of the prescribed signal.

Effects of the invention

According to the present invention, power consumption of a user terminal can be suppressed in a future wireless communication system.

Drawings

Fig. 1 is a diagram showing an example of WUS transmission in WUS resources.

Fig. 2 is a diagram showing an example of a pattern of the arrangement of SS blocks CORESET, PDSCH.

Fig. 3 is a diagram showing an example of the arrangement of the pattern 3.

Fig. 4 is a diagram showing an example of the multiplexing method 1-1.

Fig. 5 is a diagram showing an example of the multiplexing method 1-2.

Fig. 6 is a diagram showing some examples of multiplexing methods 1-2.

Fig. 7 is a diagram showing an example of multiplexing methods 1 to 3.

Fig. 8 is a diagram showing an example of multiplexing methods 1 to 4.

Fig. 9 is a diagram showing an example of multiplexing methods 1 to 5.

Fig. 10 is a diagram showing an example of a method of multiplexing WUS in pattern 1 in the case where SS blocks and CORESET are consecutive in the time domain.

Fig. 11 is a diagram showing an example of a method of multiplexing WUS in pattern 1 in the case where an SS block and CORESET are separated in the time domain.

Fig. 12 is a diagram showing an example of a multiplexing method of WUS for pattern 2.

Fig. 13 is a diagram showing an example of a schematic configuration of the radio communication system according to the present embodiment.

Fig. 14 is a diagram showing an example of the overall configuration of the radio base station according to the present embodiment.

Fig. 15 is a diagram showing an example of the functional configuration of the radio base station according to the present embodiment.

Fig. 16 is a diagram showing an example of the overall configuration of the user terminal according to the present embodiment.

Fig. 17 is a diagram showing an example of a functional configuration of a user terminal according to the present embodiment.

Fig. 18 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to the present embodiment.

Detailed Description

In the conventional LTE system, a user terminal in an RRC idle state detects Downlink Control Information (DCI) transmitted in a Common search space (Common SS) of a downlink control channel (PDCCH) at a predefined paging timing. Then, based on scheduling (DL assignment) information included in the DCI, a paging message (paging message) transmitted by a downlink shared channel (PDSCH) is acquired. Further, as the DCI, a DCI (DCI Format 1A or DCI Format 1C) scrambled (scramble) by a Paging identifier (P-RNTI: paging-Radio Network Temporary Identifier, paging radio network temporary identifier) is used.

The Paging message transmitted from the radio base station may include a Paging Record (Paging Record), change instruction information (for example, systeminfoomodification) of system information, ETWS (Earthquake and Tsunami Warning System ), CMAS (Commercial Mobile Alert Service, commercial mobile alert service), EAB (Extended Access Barring, extended access limit), and the like for each user terminal.

The Paging timing at which the user terminal detects the Paging channel is set based on a Paging Occasion (PO) indicating a subframe in which DCI scrambled by the P-RNTI is transmitted and a radio Frame (PF) containing PO. The user terminal detects (monitors) the paging channel based on the PO and the PF. The idle-state user terminal can reduce power consumption by performing a reception operation (DRX) only during a period in which it is necessary to monitor a paging channel, and by setting the idle-state user terminal to a sleep state or a power saving state during other periods. In addition, the paging channel may be configured to include a downlink control channel for transmitting DCI scrambled with the P-RNTI and a downlink shared channel for transmitting a paging message, the downlink shared channel being assigned by the DCI indication.

However, the UE consumes power by monitoring the downlink control channel every time the PO.

A wake-up signal (WUS) is being studied for power saving (power save) for IoT (Internet of Things ) UEs, e.g., NB (Narrow Band) -IoT, eMTC (enhanced Machine Type Communication ). The UE controls reception of other signals in response to reception of WUS. WUS may also be referred to as a start signal, a wake signal, a start indication signal, a receive indication signal, a paging indication signal, a PDCCH monitoring trigger signal, etc. The WUS may be supported by idle mode (idle mode) UEs or may be supported by RRC connected mode UEs.

WUS is also being studied in NR.

For example, as shown in fig. 1, the NW (e.g., radio base station) sets periodic WUS resources to the UE. The UE is in a power saving state (sleep state) during a period other than WUS resources. The UE monitors WUS in WUS resources.

If a paging message for the UE occurs, the NW transmits WUS using WUS resources. And if the UE detects the WUS, the UE receives a downlink control channel and/or a downlink shared channel. For example, when WUS is detected, the UE receives a PDCCH in a paging control resource set (CORESET (Control Resource Set) for paging), and receives a paging message in a PDSCH scheduled by the PDCCH. The UE does not monitor the PDCCH when WUS is not detected (Discontinuous Transmission: DTX). In addition, the detection process of WUS may be simpler than the detection process of the downlink control channel. Therefore, the case of periodically monitoring WUS can reduce power consumption as compared with the case of periodically monitoring the downlink control channel.

However, various wireless communication services are to be realized in future wireless communication systems (e.g., 5G, NR) to satisfy different requirements (e.g., ultra-high speed, large capacity, ultra-low delay, etc.). For example, in a future wireless communication system, as described above, communication by Beam Forming (BF: beam Forming) is under study.

BF can be classified as digital BF and analog BF. Digital BF is a method of pre-coding signal processing on baseband (digital signal). In this case, the parallel processing of inverse fast fourier transform (IFFT: inverse Fast Fourier Transform)/digital-to-analog conversion (DAC: digital to Analog Converter)/RF (Radio Frequency) requires only the amount of the number of antenna ports (RF chain). On the other hand, the number of beams corresponding to the number of RF chains can be formed at an arbitrary timing.

Analog BF is a method that utilizes a phase shifter on the RF. In this case, since only the phase of the RF signal is rotated, the structure is simple and can be realized at low cost, but a plurality of beams cannot be formed at the same timing. Specifically, in analog BF, each phase shifter can only form one beam at a time.

Therefore, in the case where a base station (for example, called eNB (evolved Node B), BS (Base Station), etc.) has only one phase shifter, a beam that can be formed at a time is one. Therefore, when a plurality of beams are transmitted using only analog BF, the beams cannot be transmitted simultaneously on the same resource, and therefore, it is necessary to switch the beams in time or rotate them.

In future wireless communication systems (e.g., LTE rel.14 and later, 5G, NR, etc.), it is being studied to define signal blocks (also referred to as SS blocks (SSB), SS/PBCH blocks, etc.) including synchronization signals (also referred to as SS, PSS, and/or SSs, or NR-PSS, NR-SSs, etc.) and broadcast channels (also referred to as broadcast signals, PBCH, NR-PBCH, etc.). The set of more than one signal block is also referred to as a signal burst (SS/PBCH burst or SS burst). Multiple signal blocks within the signal burst are transmitted by different beams at different times (also known as beam sweep (beam sweep), etc.).

The SS/PBCH block is composed of more than one symbol (e.g., OFDM symbol). Specifically, the SS/PBCH block may be composed of a plurality of consecutive symbols. Within the SS/PBCH block, PSS, SSs, and NR-PBCH may be respectively configured in different one or more symbols. For example, it is also being studied to construct SS/PBCH blocks from 4 or 5 symbols including PSS of one symbol, SSS of one symbol, PBCH of 2 or 3 symbols.

The set of one or more SS/PBCH blocks may also be referred to as an SS/PBCH burst. The SS/PBCH burst may be composed of SS/PBCH blocks with contiguous frequency and/or time resources, or may be composed of SS/PBCH blocks with non-contiguous frequency and/or time resources. The SS/PBCH burst may be set at a predetermined period (may be referred to as an SS/PBCH burst period), or may be set aperiodically.

In addition, one or more SS/PBCH bursts may also be referred to as SS/PBCH burst sets (SS/PBCH burst sequences), and may also be referred to as SS block periods. The SS/PBCH burst set is set periodically. The user terminal may assume control of the reception process for SS/PBCH burst is periodically transmitted (at SS/PBCH burst period (SS burst set periodicity)).

Each SS/PBCH block within the SS/PBCH burst set is identified by a specified index (SS/PBCH index). The SS/PBCH index may be any information that uniquely identifies the SS/PBCH block within the SS/PBCH burst set, or may correspond to a time index.

The user terminal may also envisage a suspected co-location (QCL) for at least one of space (spatial), average gain (average gain), delay (delay) and doppler parameter (Doppler parameters) between SS/PBCH blocks having the same SS/PBCH index between SS/PBCH burst sets.

Here, the suspected co-location (QCL) refers to a space (beam) that can be assumed to be used for transmission of a plurality of different SS/PBCH blocks, and at least one of average gain, delay, and doppler parameter among the plurality of SS/PBCH blocks is the same.

In addition, the ue may also consider no suspected co-location for at least one of spatial, average gain, delay, and doppler parameters among SS/PBCH blocks having SS/PBCH indexes that are different within and between SS/PBCH burst sets.

The CORESET of PDCCH for scheduling PDSCH carrying RMSI (Remaining Minimum System Information (minimum system information remaining), system information) may also be referred to as CORESET for RMSI (CORESET for RMSI, RMSI CORESET). The UE may read the PBCH in the SS block, read the PDCCH from the RMSI CORESET set based on the PBCH, and read the RMSI from the PDSCH scheduled by the PDCCH.

For time multiplexing (time division multiplexing (Time Division Multiplexing: TDM)) and/or frequency multiplexing (frequency division multiplexing (Frequency Division Multiplexing: FDM)) between SS blocks and RMSI CORESET, the following patterns 1 to 3 are being studied.

In pattern 1 shown in 2A in fig. 2, SS blocks and CORESET are TDM. Further, CORESET and PDSCH are TDM. In the time direction, an SS block is initially followed by CORESET, then PDSCH.

In pattern 2 shown in 2B in fig. 2, SS blocks and PDSCH are FDM, and CORESET and PDSCH are TDM. The SS blocks and CORESET do not overlap in the time direction and the SS blocks and CORESET do not overlap in the frequency direction. In the time direction, initially CORESET, followed by SS blocks and PDSCH.

In pattern 3 shown in 2C in fig. 2, SS blocks and CORESET are FDM. Further, SS blocks and PDSCH are FDM, and CORESET and PDSCH are TDM. In the time direction, initially CORESET, followed by PDSCH.

In addition, CORESET of PDCCH for scheduling PDSCH carrying Paging message may also be called CORESET for Paging (CORESET for Paging, paging CORESET). The CORESET for RMSI and the CORESET for paging may be a common CORESET. In other words, RMSI and paging messages may be carried by PDSCH associated with a particular CORESET.

However, the relation between SS blocks, CORESET, and PDSCH and WUS has not been studied.

Accordingly, the present inventors have studied a method of frequency multiplexing and/or time multiplexing WUS for at least one of SS blocks, CORESET, and PDSCH, and completed the present invention.

For example, WUS is associated with a PDSCH carrying RMSI and/or paging messages, CORESET of PDCCH for scheduling the PDSCH, and SS blocks associated with CORESET.

For example, the UE may receive WUS using one of the periodic radio resources time-multiplexed or frequency-multiplexed with at least one of PDSCH, CORESET and SS blocks and control reception of PDCCH in response to reception of WUS.

Radio resources can be efficiently utilized by WUS being frequency-multiplexed and/or time-multiplexed with at least one of SS blocks, CORESET, and PDSCH. Since the UE can decode the PDCCH and PDSCH associated with WUS based on the detection of WUS, it is possible to suppress the power consumption of the UE and suppress the increase in the operation of the UE.

An embodiment of the present invention will be described in detail below with reference to the drawings. Hereinafter, PDSCH carrying RMSI and/or paging message may be simply referred to as PDSCH. The CORESET of the PDCCH for scheduling the PDSCH is sometimes simply referred to as CORESET.

(first mode)

In the first embodiment, a method of multiplexing WUS in pattern 3 is described.

Fig. 3 is a diagram showing an example of the arrangement of the pattern 3. Here, a set (signal set) of two patterns continuous in the time direction is periodically arranged. The two patterns in one signal set may also be separated in time (or may be discontinuous).

In the case of applying analog BF (beam scanning), different beams (transmit beam or receive beam) may also be applied for two patterns in one signal set.

The SS block has a duration of 4 symbols. The core has a duration of 1 symbol and is FDM with the first symbol of the SS block. The PDSCH is 3 symbols long, and is FDM with the 2 nd to 4 th symbols of the SS block and TDM with CORESET. Two SS blocks that are consecutive in the time direction may also be referred to as an SS burst or SS burst set.

In the case of performing the simulation BF, the pattern 3 can suppress the duration of the pattern. For example, WUS can be configured in symbols of an SS block. Therefore, since a large number of patterns can be arranged in a short time, a large number of beams can be scanned in a short time.

The WUS resources may be multiplexed with pattern 3 by any one of the following multiplexing methods 1-1 to 1-4.

< multiplexing method 1-1>

The wus resources may also be FDM with CORESET for pattern 3.

As shown in fig. 4, in the case where the band of CORESET is narrower than the band of PDSCH, WUS resources may be configured in a part or all of the bands other than CORESET in the band of PDSCH.

In the event that RMSI and/or paging messages occur, WUS may be transmitted in WUS resources within the signal set containing the RMSI and/or paging messages. Further, in the case where WUS is periodically transmitted, the period of WUS may be longer than the period of the signal set.

The WUS resources may be adjacent to CORESET in the frequency domain or may be separate from CORESET.

The WUS resources may be contiguous or non-contiguous in the frequency domain.

By configuring WUS and CORESET in the starting symbol of the pattern, the UE is able to perform WUS detection and decoding of PDCCH within CORESET in one symbol.

< multiplexing method 1-2>

The wus resources may also be FDM with the SS blocks for pattern 3.

As shown in fig. 5, WUS resources may also be configured throughout the symbols of the SS block. Compared to multiplexing method 1-1, WUS of multiplexing method 1-2 is shorter in the frequency direction and longer in the time direction.

In the case where WUS resources are 4 symbols, the UE may hold CORESET for 4 symbols until WUS is detected, or may hold PDSCH for 3 symbols and perform CORESET and PDSCH reception processing after WUS is detected. The UE may also decide to detect WUS before receiving all WUS.

Fig. 6 is a diagram illustrating some examples of FDM methods of WUS resources and SS blocks.

As shown at 6A in fig. 6, WUS resources may be configured in a band that is outside of the SS block with respect to the pattern. The WUS resources may be configured in a band adjacent to the SS block or in a band separate from the SS block.

As shown in 6B in fig. 6, WUS resources may be configured in a band between PDSCH and SS blocks. The WUS resources may be configured in a band adjacent to the PDSCH and the SS block or may be configured in a band separate from at least one of the PDSCH and the SS block.

As shown in 6C in fig. 6, WUS resources may be configured in a band that is outside of the PDSCH with respect to the pattern. The WUS resources may be configured in a band adjacent to the PDSCH or in a band separate from the PDSCH.

As shown in 6D in fig. 6, WUS resources may be configured in multiple bands. The plurality of bands may be bands outside the SS blocks with respect to the pattern, PDSCH, and bands between SS blocks. The plurality of bands may be bands outside the PDSCH with respect to the pattern, and bands between the PDSCH and SS blocks. The plurality of bands may be bands located outside the PDSCH with respect to the pattern or bands located outside the SS block with respect to the pattern.

< multiplexing method 1-3>

The wus resources may also be TDM with SS blocks for pattern 3.

As shown in fig. 7, in case that two patterns in one signal set are separated from each other, WUS resources may be configured before an SS block in the time domain. The WUS resources may be configured in symbols adjacent to the SS block or in symbols separate from the SS block.

Multiplexing methods 1-3 may also be employed in cases where SS blocks are set discontinuously.

The domain of WUS may be the same as the domain of the SS block or may be different from at least a portion of the domain of the SS block.

Since CORESET is configured after WUS in the time domain, the UE decodes PDCCH within CORESET after detecting WUS. This sequential processing can suppress the load of the UE.

< multiplexing method 1-4>

The wus resources may also be TDM with CORESET for pattern 3.

As shown in fig. 8, in the case where two patterns in one signal set are separated from each other, WUS resources may be configured before CORESET in the time domain. The WUS resources may be configured in symbols adjacent to CORESET or in symbols separate from CORESET.

Multiplexing methods 1-4 may also be employed in cases where SS blocks are set discontinuously.

The bands of WUS may overlap with the bands of CORESET or may be different from at least a portion of the bands of SS blocks.

< multiplexing method 1-5>

For pattern 3, wus resources may be TDM with SS blocks and CORESET.

As shown in fig. 9, before repeatedly transmitting the SS block, CORESET, and PDSCH, a plurality of different WUS resources (in fig. 9, the number of resources is 2) may be collectively configured. In this case, the number of resources of WUS may be the same as the number of SS blocks, or a different value may be set by higher layer signaling.

As shown in fig. 9, WUS resources may be configured in some or all of the bands of the SS block, CORESET, and PDSCH, and WUS resources may be configured in frequency locations that do not overlap with these bands.

By intensively configuring WUS resources before the repeatedly transmitted SS block, core, and PDSCH, it is possible to monitor only WUS resources in a short time, and to suppress power consumption of the UE.

According to the first aspect, the time of beam scanning can be prevented from increasing due to multiplexing of WUS.

(second mode)

In the second embodiment, a method of multiplexing WUS in pattern 1 is described.

As shown at 10A in fig. 10, WUS resources may be FDM with SS blocks. The WUS resources may be configured in a band adjacent to the SS block or in a band separate from the SS block.

The WUS resources may also be FDM with CORESET as shown at 10B in fig. 10. The WUS resources may be configured in a band adjacent to CORESET or in a band separate from CORESET. The band of WUS resources and CORESET may be the band of PDSCH. The WUS resources and CORESET may be the same as the SS block or may be different from at least a portion of the SS block. By configuring WUS and CORESET in one symbol, the UE can perform WUS detection and decoding of PDCCH within CORESET in one symbol.

As shown at 10C in fig. 10, WUS resources may be TDM with the SS block and configured before the SS block in the time domain. The WUS resources may be configured in symbols adjacent to the SS block or in symbols separate from the SS block.

As shown at 10D in fig. 10, WUS resources may be TDM with the PDSCH and configured after the PDSCH in the time domain. The WUS resources may be arranged in symbols adjacent to the PDSCH or in symbols separated from the PDSCH.

WUS resources may be TDM with the SS block and configured between the SS block and CORESET in the time domain. The WUS resources may be configured in symbols separate from the SS block and CORESET, or may be configured in symbols adjacent to at least one of the SS block and CORESET.

In 10A in fig. 10, 10C in fig. 10, and 11, CORESET is arranged after WUS in the time domain, and therefore, the UE decodes PDCCH in CORESET after WUS is detected. This sequential processing can suppress the load of the UE.

In 10B in fig. 10, since WUS resources and CORESET are configured in the same symbol, the UE can perform WUS detection and decoding of PDCCH in CORESET in one symbol.

According to the second aspect, WUS can be multiplexed in pattern 1.

(third mode)

In a third embodiment, a method of multiplexing WUS in pattern 2 is described.

As shown at 12A in fig. 12, WUS resources may be FDM with CORESET and TDM with PDSCH. The WUS resources may be configured in a band adjacent to CORESET or in a band separate from CORESET. The WUS resources and the CORESET may be part of the PDSCH band or may be the same as the PDSCH band. By configuring WUS and CORESET in one symbol, the UE can perform WUS detection and decoding of PDCCH within CORESET in one symbol.

As shown at 12B in fig. 12, WUS resources may be FDM with SS blocks. The WUS resources may be configured in a band adjacent to the SS block or in a band separate from the SS block. The plurality of symbols configuring WUS resources may be the same as or part of the plurality of symbols configuring the SS block.

As shown at 12C in fig. 12, WUS resources may be FDM with CORESET and TDM with SS blocks. The bandwidth of the WUS resource may be the same as the bandwidth of the SS block or may be part of the bandwidth of the SS block. The WUS resources may be configured in a separate band from CORESET or in a band adjacent to CORESET. By configuring WUS and CORESET in one symbol, the UE can perform WUS detection and decoding of PDCCH within CORESET in one symbol.

As shown at 12D in fig. 12, WUS resources may be TDM with PDSCH and FDM with SS blocks. The band of WUS resources may be the same as or part of the band of PDSCH. The WUS resources may be configured in a band adjacent to the SS block or in a band separate from the SS block. WUS resources may be configured after the PDSCH or before the PDSCH in the time domain.

In 12A in fig. 12 and 12C in fig. 12, since WUS resources and CORESET are configured in the same symbol, the UE can perform WUS detection and decoding of PDCCH in CORESET in one symbol.

According to the third aspect, since WUS is multiplexed into the time resource and the frequency resource of pattern 2, WUS can be multiplexed without increasing the duration (number of symbols) of pattern 2. Therefore, the time of beam scanning can be prevented from increasing due to multiplexing of WUS.

In the first to third aspects, the arrangement of WUS, SS blocks, CORESET, PDSCH is not limited to the example in the figure. The amount of time resources and the amount of frequency resources in WUS resources may be changed as long as WUS resources in which WUS (for example, a predetermined sequence) can be allocated can be ensured. For example, in the WUS resources of the multiplexing method 1-2, the time resources (the number of symbols) may be set to 1/2 times, and the frequency resources (bandwidth) may be set to two times.

(fourth mode)

In a fourth approach, UE operation for WUS is explained.

In case the UE has not established synchronization, the UE may detect SS blocks (or only PSS and SSs in SS blocks), then WUS, and then decode PDCCH within CORESET. In this case, the UE establishes synchronization using PSS and SSs within the SS block.

The UE may also detect WUS in a state where synchronization has not been established. In addition, the UE may also utilize WUS to establish coarse (approximate) synchronization. The UE may also detect WUS in case it is able to detect WUS in a state where synchronization has not been established, then detect SS blocks (or detect PSS and SSs only in SS blocks), and then decode PDCCH in CORESET. In case that the UE establishes coarse synchronization using WUS, fine synchronization may be established using PSS and SSs within the SS block.

The UE may also utilize WUS to establish synchronization. In case synchronization can be established using WUS, or in case synchronization has been established, the UE may detect WUS and then decode PDCCH within CORESET. In this case, the UE may not detect the SS block.

The UE may assume that the time position and/or frequency position of CORESET with respect to WUS resources associated with CORESET is fixed within the PBCH TTI. Alternatively, the UE may also envisage that the time position and/or frequency position of CORESET relative to WUS resources associated with CORESET is fixed in the specification.

The UE decoded the PDCCH decodes RMSI and/or paging messages within the PDSCH scheduled by the PDCCH.

WUS resources may be set by broadcast information (e.g., RMSI) or higher layer signaling (e.g., RRC signaling). WUS resources for idle mode UEs may be set by RMSI. WUS resources for the clustered UEs may be set through RRC signaling. WUS resources for the UE in RRC connected mode may be set through RRC signaling.

The bandwidth of WUS may also be independent of the channel bandwidth (network bandwidth). The bandwidth of WUS may also be a value fixed by the specification. Furthermore, the bandwidth of WUS may also depend on the subcarrier spacing (subcarrier spacing).

(Wireless communication System)

The configuration of the wireless communication system according to the present embodiment will be described below. In this wireless communication system, communication is performed by any one of the above aspects of the present invention or a combination thereof.

Fig. 13 is a diagram showing an example of a schematic configuration of the radio communication system according to the present embodiment. In the wireless communication system 1, carrier Aggregation (CA) and/or Dual Connection (DC) in which a plurality of basic frequency blocks (component carriers) in 1 unit of a system bandwidth (e.g., 20 MHz) of an LTE system are integrated can be applied.

The radio communication system 1 may be referred to as LTE (Long Term Evolution ), LTE-a (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4 th generation mobile communication system, fourth generation mobile communication system), 5G (5 th generation mobile communication system, fifth generation mobile communication system), FRA (Future Radio Access ), new-RAT (Radio Access Technology, radio access technology), NR, or the like, and may be referred to as a system for realizing the same.

The wireless communication system 1 includes: a radio base station 11 forming a macro cell C1 having a wide coverage area, and radio base stations 12 (12 a-12C) disposed in the macro cell C1 and forming a small cell C2 narrower than the macro cell C1. In addition, the macro cell C1 and each small cell C2 are provided with a user terminal 20.

The user terminal 20 can connect to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously with CA or DC. Further, the user terminal 20 may apply CA or DC using a plurality of cells (CCs) (e.g., 5 CCs or less, 6 CCs or more). For example, in DC, meNB (MCG) applies LTE cell and SeNB (SCG) applies NR/5G-cell for communication.

The user terminal 20 and the radio base station 11 can communicate with each other using a carrier (also referred to as an existing carrier, legacy carrier (legacy carrier), or the like) having a narrow bandwidth in a relatively low frequency band (for example, 2 GHz). On the other hand, a carrier having a wide bandwidth may be used between the user terminal 20 and the radio base station 12 in a relatively high frequency band (for example, 3.5GHz, 5GHz, etc.), or the same carrier as that between the radio base stations 11 may be used. The configuration of the frequency band used by each radio base station is not limited to this.

The radio base station 11 and the radio base station 12 (or between 2 radio base stations 12) can be connected by wire (for example, an optical fiber conforming to CPRI (Common Public Radio Interface, common public radio interface), an X2 interface, or the like) or wirelessly.

The radio base station 11 and each radio base station 12 are connected to the upper station device 30, and are connected to the core network 40 via the upper station device 30. The upper station device 30 includes, for example, an access gateway device, a Radio Network Controller (RNC), a Mobility Management Entity (MME), and the like, but is not limited thereto. Each radio base station 12 may be connected to the upper station apparatus 30 via the radio base station 11.

The radio base station 11 is a radio base station having a relatively wide coverage area, and may be referred to as a macro base station, a sink node, an eNB (eNodeB), a transmission/reception point, or the like. The radio base station 12 is a radio base station having a local coverage area, and may be referred to as a small-sized base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head ), a transmission/reception point, or the like. Hereinafter, the radio base stations 11 and 12 are collectively referred to as the radio base station 10 without distinction.

Each user terminal 20 is a terminal supporting various communication schemes such as LTE and LTE-a, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).

In the radio communication system 1, as a radio access scheme, orthogonal frequency division multiple access (OFDMA: orthogonal Frequency Division Multiple Access) is applied in the downlink, and single carrier-frequency division multiple access (SC-FDMA: single Carrier Frequency Division Multiple Access) is applied in the uplink.

OFDMA is a multi-carrier (Multicarrier) transmission scheme in which a frequency band is divided into a plurality of narrower frequency bands (subcarriers), and data is mapped to each subcarrier to perform communication. SC-FDMA is a single carrier transmission scheme in which a system bandwidth is divided into 1 or a continuous resource block for each terminal, and a plurality of terminals use different bands, thereby reducing interference between terminals. The uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.

In the radio communication system 1, a downlink shared channel (PDSCH: physical Downlink Shared Channel, physical downlink shared channel), a broadcast channel (physical broadcast channel (PBCH: physical Broadcast Channel), NR-PBCH), a downlink L1/L2 control channel, and the like, which are shared by the user terminals 20, are used as downlink channels. At least one of user data, higher layer control information, SIB (System Information Block ), etc. is transmitted through the PDSCH. In addition, MIB (Master Information Block ) is transmitted through PBCH. A common control channel informing of the presence or absence of a paging channel is mapped to a downlink L1/L2 control channel (e.g., PDCCH), and data of a Paging Channel (PCH) is mapped to PDSCH. The downlink reference signal, the uplink reference signal, and the synchronization signal of the physical downlink are additionally configured.

The downlink L1/L2 control channels include PDCCH (Physical Downlink Control Channel ), EPDCCH (Enhanced Physical Downlink Control Channel, enhanced Physical downlink control channel), PCFICH (Physical Control Format Indicator Channel ), PHICH (Physical Hybrid-ARQ Indicator Channel, physical Hybrid automatic repeat request indicator channel), and the like. Downlink control information (DCI: downlink Control Information)) including scheduling information of PDSCH and PUSCH is transmitted through PDCCH. The number of OFDM symbols for the PDCCH is transmitted through the PCFICH. Acknowledgement information (e.g., also referred to as retransmission control information, HARQ-ACK, ACK/NACK, etc.) for HARQ (Hybrid Automatic Repeat reQuest ) of PUSCH is transmitted through PHICH. EPDCCH and PDSCH (downlink shared data channel) are frequency division multiplexed, and are used for transmitting DCI and the like as in PDCCH.

In the radio communication system 1, as uplink channels, uplink shared channels (PUSCH: physical Uplink Shared Channel, physical uplink shared channel), uplink control channels (PUCCH: physical Uplink Control Channel, physical uplink control channel), random access channels (PRACH: physical Random Access Channel, physical random access channel) and the like shared by the user terminals 20 are used. User data and/or higher layer control information is transmitted through PUSCH, etc. Further, radio quality information (CQI: channel Quality Indicator, channel quality indicator), delivery acknowledgement information, and the like of the downlink are transmitted through the PUCCH. A random access preamble for establishing a connection with a cell is transmitted through the PRACH.

In the wireless communication system 1, cell specific Reference signals (CRS: cell-specific Reference Signal), channel state information Reference signals (CSI-RS: channel State Information-Reference Signal), demodulation Reference signals (DMRS: deModulation Reference Signal), positioning Reference signals (PRS: positioning Reference Signal), and the like are transmitted as downlink Reference signals. In the radio communication system 1, a measurement reference signal (SRS: sounding Reference Signal, sounding reference signal), a demodulation reference signal (DMRS), and the like are transmitted as uplink reference signals. In addition, the DMRS may also be referred to as a user terminal specific reference signal (UE-specific Reference Signal, UE specific reference signal). Further, the transmitted reference signal is not limited thereto.

< radio base station >

Fig. 14 is a diagram showing an example of the overall configuration of the radio base station according to the present embodiment. The radio base station 10 includes a plurality of transmitting and receiving antennas 101, an amplifier unit 102, a transmitting and receiving unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106. The transmitting/receiving antenna 101, the amplifier unit 102, and the transmitting/receiving unit 103 may be configured to include 1 or more.

User data transmitted from the radio base station 10 to the user terminal 20 on the downlink is input from the upper station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.

The baseband signal processing section 104 performs, with respect to user data, processing of PDCP (Packet Data Convergence Protocol ) layer, segmentation/combination of user data, transmission processing of RLC layer such as RLC (Radio Link Control ) retransmission control, MAC (Medium Access Control ) retransmission control (e.g., HARQ transmission processing), scheduling, transport format selection, channel coding, inverse fast fourier transform (IFFT: inverse Fast Fourier Transform) processing, precoding processing, and the like, and transfers the processing to the transmitting/receiving section 103. The downlink control signal is also subjected to transmission processing such as channel coding and inverse fast fourier transform, and is forwarded to the transmitting/receiving section 103.

The transmitting/receiving section 103 converts the baseband signal output from the baseband signal processing section 104 by precoding for each antenna into a radio band and transmits the converted signal. The radio frequency signal frequency-converted in the transmitting/receiving unit 103 is amplified by the amplifier unit 102 and transmitted from the transmitting/receiving antenna 101. The transmitting/receiving unit 103 can be configured by a transmitter/receiver, a transmitting/receiving circuit, or a transmitting/receiving device described based on common knowledge in the technical field of the present invention. The transmitting/receiving unit 103 may be a single transmitting/receiving unit, or may be a combination of a transmitting unit and a receiving unit.

Further, the transmitting and receiving unit 103 may transmit the prescribed signal (e.g., WUS) using at least one of periodic radio resources (e.g., WUS resources) that are time multiplexed (TDM) or frequency multiplexed (FDM) with at least one of a downlink shared channel (e.g., PDSCH carrying RMSI and/or paging message), a control resource set (CORESET including PDCCH scheduling PDSCH carrying RMSI and/or paging message), and a synchronization signal block (e.g., SS block).

On the other hand, regarding the uplink signal, the radio frequency signal received through the transmitting-receiving antenna 101 is amplified by the amplifier unit 102. The transmitting/receiving unit 103 receives the uplink signal amplified by the amplifier unit 102. The transmitting/receiving unit 103 frequency-converts the received signal into a baseband signal, and outputs the baseband signal to the baseband signal processing unit 104.

The baseband signal processing section 104 performs fast fourier transform (FFT: fast Fourier Transform) processing, inverse discrete fourier transform (IDFT: inverse Discrete Fourier Transform) processing, error correction decoding, reception processing for MAC retransmission control, and reception processing for RLC layer and PDCP layer on the user data included in the input uplink signal, and transfers the result to the upper station apparatus 30 via the transmission path interface 106. Call processing section 105 performs at least one of call processing such as setting and release of a communication channel, state management of radio base station 10, and management of radio resources.

The transmission path interface 106 transmits and receives signals to and from the upper station device 30 via a predetermined interface. In addition, the transmission path interface 106 can transmit and receive signals (backhaul signaling) with other wireless base stations 10 via inter-base station interfaces (e.g., optical fiber conforming to CPRI (Common Public Radio Interface, common public wireless interface), X2 interface).

Fig. 15 is a diagram showing an example of the functional configuration of the radio base station according to the present embodiment. In this example, the functional blocks of the characteristic part in the present embodiment are mainly shown, and the radio base station 10 is provided with other functional blocks necessary for radio communication.

Baseband signal processing section 104 includes at least control section (scheduler) 301, transmission signal generating section 302, mapping section 303, reception signal processing section 304, and measuring section 305. These structures may be included in the radio base station 10, or some or all of the structures may not be included in the baseband signal processing section 104. The baseband signal processing unit 104 has a digital beamforming function that provides digital beamforming.

The control unit (scheduler) 301 controls the entire radio base station 10. The control unit 301 can be configured by a controller, a control circuit, or a control device described based on common knowledge in the technical field of the present invention.

The control unit 301 controls, for example, at least one of generation of a signal based on the transmission signal generation unit 302 (including a signal corresponding to at least one of a synchronization signal, RMSI, MIB, paging channel, system information, broadcast channel (broadcast signal)), allocation of a signal based on the mapping unit 303, and the like.

Further, control section 301 may set a downlink shared channel, a control resource set including a downlink control channel for scheduling the downlink shared channel, and a synchronization signal block for user terminal 20.

Transmission signal generation section 302 generates a downlink signal (at least one of a downlink control signal, a downlink data signal, a downlink reference signal, and an SS/PBCH block, etc.) based on the instruction from control section 301, and outputs the generated downlink signal to mapping section 303. The transmission signal generation unit 302 may be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common knowledge in the technical field of the present invention.

Transmission signal generation section 302 generates DL assignment (DL assignment) for notifying assignment information of a downlink signal and UL grant (UL grant) for notifying assignment information of an uplink signal, for example, based on an instruction from control section 301. The downlink data signal is subjected to coding and modulation processing according to a coding rate, modulation scheme, and the like determined based on channel state information (CSI: channel State Information) and the like from each user terminal 20.

Mapping section 303 maps the downlink signal generated in transmission signal generating section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the mapped downlink signal to transmitting/receiving section 103. The mapping unit 303 can be constituted by a mapper, a mapping circuit, or a mapping device described based on common knowledge in the technical field of the present invention.

The reception signal processing unit 304 performs reception processing (e.g., demapping, demodulation, decoding, etc.) on the reception signal input from the transmission/reception unit 103. Here, the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20. The received signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common knowledge in the technical field of the present invention.

The reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when receiving a PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301. Further, the received signal processing unit 304 outputs the received signal and the received processed signal to the measurement unit 305.

The measurement unit 305 performs measurements related to the received signals. The measurement unit 305 can be constituted by a measuring instrument, a measurement circuit, or a measurement device described based on common knowledge in the technical field of the present invention.

The measurement unit 305 may measure, for example, the received power (e.g., RSRP (Reference Signal Received Power, reference signal received power)), the received quality (e.g., RSRQ (Reference Signal Received Quality, reference signal received quality), SINR (Signal to Interference plus Noise Ratio )), and/or channel state of the received signal. The measurement result may be output to the control unit 301.

< user terminal >

Fig. 16 is a diagram showing an example of the overall configuration of the user terminal according to the present embodiment. The user terminal 20 includes a plurality of transmitting/receiving antennas 201, an amplifier unit 202, a transmitting/receiving unit 203, a baseband signal processing unit 204, and an application unit 205. The transmitting/receiving antenna 201, the amplifier unit 202, and the transmitting/receiving unit 203 may each include one or more components.

The radio frequency signal received through the transmitting-receiving antenna 201 is amplified in the amplifier unit 202. The transmitting/receiving section 203 receives the downlink signal amplified by the amplifier section 202. The transmitting/receiving unit 203 frequency-converts the received signal into a baseband signal, and outputs the baseband signal to the baseband signal processing unit 204. The transmitting/receiving unit 203 can be configured by a transmitter/receiver, a transmitting/receiving circuit, or a transmitting/receiving device described based on common knowledge in the technical field of the present invention. The transmitting/receiving unit 203 may be configured as an integral transmitting/receiving unit, or may be configured by a transmitting unit and a receiving unit.

The baseband signal processing section 204 performs at least one of FFT processing, error correction decoding, and reception processing for retransmission control on the input baseband signal. The downlink user data is forwarded to an application unit 205. The application unit 205 performs processing related to a layer higher than the physical layer and the MAC layer, and the like. In addition, broadcast information in the data that may be downlink is also forwarded to the application unit 205.

On the other hand, uplink user data is input from the application unit 205 to the baseband signal processing unit 204. In baseband signal processing section 204, retransmission control transmission processing (e.g., HARQ transmission processing), channel coding, precoding, discrete fourier transform (DFT: discrete Fourier Transform) processing, IFFT processing, and the like are performed, and transferred to transmitting/receiving section 203. The transmitting/receiving section 203 converts the baseband signal output from the baseband signal processing section 204 into a radio frequency band and transmits the converted signal. The radio frequency signal frequency-converted in the transmitting/receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting/receiving antenna 201.

In addition, the transmitting/receiving unit 203 may further have an analog beamforming unit that performs analog beamforming. The analog beam forming means may be constituted by an analog beam forming circuit (e.g., a phase shifter, a phase shifting circuit) or an analog beam forming device (e.g., a phase shifter) described based on common knowledge in the technical field of the present invention. Further, the transmitting/receiving antenna 201 can be constituted by, for example, an antenna array.

Further, the transmitting and receiving unit 203 may receive the prescribed signal (e.g., WUS) using one of periodic radio resources (e.g., WUS resources) that are time multiplexed (TDM) or frequency multiplexed (FDM) with at least one of a downlink shared channel (e.g., PDSCH carrying RMSI and/or paging message), a control resource set including a downlink control channel that schedules the downlink shared channel (CORESET including PDCCH that schedules PDSCH carrying RMSI and/or paging message), and a synchronization signal block (e.g., SS block).

Fig. 17 is a diagram showing an example of a functional configuration of the user terminal according to the present embodiment. In this example, the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 is provided with other functional blocks necessary for wireless communication.

The baseband signal processing section 204 included in the user terminal 20 includes at least a control section 401, a transmission signal generation section 402, a mapping section 403, a reception signal processing section 404, and a measurement section 405. Further, these structures may be included in the user terminal 20, and some or all of the structures may not be included in the baseband signal processing section 204.

The control unit 401 performs control of the entire user terminal 20. The control unit 401 can be constituted by a controller, a control circuit, or a control device described based on common knowledge in the technical field of the present invention.

The control unit 401 controls, for example, generation of a signal based on the transmission signal generation unit 402 and allocation of a signal based on the mapping unit 403. Further, the control unit 401 controls reception processing of the signal based on the reception signal processing unit 404, and measurement of the signal based on the measurement unit 405.

The control unit 401 may control reception of a downlink control channel (e.g., PDCCH) in response to reception of a prescribed signal (e.g., WUS).

Further, it may be that the control resource set and the downlink shared channel are frequency multiplexed with the synchronization signal block, and the downlink shared channel is time multiplexed with the control resource set (e.g., pattern 3).

Alternatively, the control resource set may be time-multiplexed with the synchronization signal block, and the downlink shared channel may be time-multiplexed with the control resource set (e.g., pattern 1).

Alternatively, the time resource of the synchronization signal block may be different from the time resource of the synchronization signal block, the frequency resource of the synchronization signal block may be different from the frequency resource of the synchronization signal block, and the downlink shared channel may be frequency-multiplexed with the synchronization signal block and time-multiplexed with the control resource set (pattern 2).

In addition, radio resources (e.g., WUS resources) may also be frequency multiplexed with the control resource set (10B in fig. 4, 10, 12A in fig. 12, 12C in fig. 12).

Transmission signal generation section 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from control section 401, and outputs the generated uplink signal to mapping section 403. The transmission signal generation unit 402 may be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common knowledge in the technical field of the present invention.

Transmission signal generation section 402 generates an uplink control signal related to transmission acknowledgement information and/or Channel State Information (CSI), for example, based on an instruction from control section 401. Further, transmission signal generation section 402 generates an uplink data signal based on an instruction from control section 401. For example, when the UL grant is included in the downlink control signal notified from the radio base station 10, the transmission signal generation unit 402 instructs the slave control unit 401 to generate an uplink data signal.

Mapping section 403 maps the uplink signal generated in transmission signal generating section 402 to radio resources based on the instruction from control section 401, and outputs the mapped uplink signal to transmitting/receiving section 203. The mapping unit 403 can be constituted by a mapper, a mapping circuit, or a mapping device described based on common knowledge in the technical field of the present invention.

The reception signal processing unit 404 performs reception processing (e.g., demapping, demodulation, decoding, etc.) on the reception signal input from the transmission/reception unit 203. Here, the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10. The received signal processing unit 404 can be constituted by a signal processor, a signal processing circuit, or a signal processing device described based on common knowledge in the technical field of the present invention. Further, the reception signal processing unit 404 can constitute a reception unit of the present invention.

The reception signal processing unit 404 receives the synchronization signal transmitted by the radio base station applying beamforming and the broadcast channel based on the instruction from the control unit 401. In particular, a synchronization signal and a broadcast channel allocated to at least one of a plurality of time domains (e.g., symbols) constituting a prescribed transmission time interval (e.g., a subframe or a slot) are received.

The reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401. The reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401. Further, the received signal processing unit 404 outputs the received signal and the received processed signal to the measurement unit 405.

The measurement unit 405 performs measurements related to the received signals. For example, measurement section 405 may perform measurement of one or more serving cells and/or one or more peripheral cells using SS/PBCH blocks transmitted from radio base station 10. The measurement unit 405 can be constituted by a measuring instrument, a measurement circuit, or a measurement device described based on common knowledge in the technical field of the present invention.

The measurement unit 405 may measure, for example, a received power (e.g., RSRP), a received quality (e.g., RSRQ, received SINR), and/or a channel state, etc., using the received SS/PBCH block. The measurement results may also be output to the control unit 401. For example, the measurement unit 405 performs RRM measurement using the synchronization signal.

< hardware Structure >

The block diagrams used in the description of the above embodiments represent blocks of functional units. These functional blocks (structural units) are implemented by any combination of hardware and/or software. The implementation method of each functional block is not particularly limited. That is, each functional block may be realized by 1 device physically and/or logically combined, or two or more devices physically and/or logically separated may be directly and/or indirectly (for example, by wired and/or wireless) connected, and realized by a plurality of these devices.

For example, the radio base station, the user terminal, and the like in one embodiment of the present invention can function as a computer that performs the processing of the radio communication method of the present invention. Fig. 18 is a diagram showing an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention. The radio base station 10 and the user terminal 20 described above can be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the term "device" can be read as a circuit, an apparatus, a unit, or the like. The hardware configuration of the radio base station 10 and the user terminal 20 may be configured to include 1 or more of the illustrated devices, or may be configured to not include a part of the devices.

For example, the processor 1001 illustrates only 1, but there may be multiple processors. Further, the processing may be performed by 1 processor, or the processing may be performed by 1 or more processors simultaneously, sequentially, or using other methods. The processor 1001 may be implemented by 1 or more chips.

The functions of the radio base station 10 and the user terminal 20 are realized, for example, as follows: by reading predetermined software (program) into hardware such as the processor 1001 and the memory 1002, the processor 1001 performs an operation, and controls communication via the communication device 1004, or controls reading and/or writing of data in the memory 1002 and the memory 1003.

The processor 1001 controls the entire computer by, for example, operating an operating system. The processor 1001 may be constituted by a central processing unit (CPU: central Processing Unit)) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the baseband signal processing unit 104 (204), the call processing unit 105, and the like described above may also be implemented by the processor 1001.

Further, the processor 1001 reads a program (program code), a software module, data, or the like from the storage 1003 and/or the communication device 1004 to the memory 1002, and executes various processes based thereon. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiment mode is used. For example, the control unit 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and operated in the processor 1001, and the same may be implemented with respect to other functional blocks.

The Memory 1002 is a computer-readable recording medium, and may be constituted by at least 1 of ROM (Read Only Memory), EPROM (Erasable Programmable ROM, erasable programmable Read Only Memory), EEPROM (Electrically EPROM, electrically erasable programmable Read Only Memory), RAM (Random Access Memory ), and other suitable storage media, for example. The memory 1002 may also be referred to as a register, a cache, a main memory (main storage), or the like. The memory 1002 can store executable programs (program codes), software modules, and the like for implementing a wireless communication method of an embodiment of the present invention.

The storage 1003 may also be a computer-readable recording medium composed of at least one of, for example, a flexible disk (flexible Disc), a soft (registered trademark) disk, an magneto-optical disk (such as a Compact disk (CD-ROM), a digital versatile disk (Blu-ray Disc), a removable disk (removable disk), a hard disk drive, a smart card (smart card), a flash memory device (such as a card, a stick, a key drive), a magnetic stripe (stripe), a database, a server, and other appropriate storage media. The storage 1003 may also be referred to as secondary storage.

The communication device 1004 is hardware (transmitting/receiving device) for performing communication between computers via a wired and/or wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like. In order to realize, for example, frequency division duplexing (FDD: frequency Division Duplex) and/or time division duplexing (TDD: time Division Duplex), the communication device 1004 may also be configured to include a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like. For example, the transmission/reception antenna 101 (201), the amplifier unit 102 (202), the transmission/reception unit 103 (203), the transmission path interface 106, and the like described above may be implemented by the communication device 1004.

The input device 1005 is an input apparatus (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, or the like) that receives an input from the outside. The output device 1006 is an output apparatus (for example, a display, a speaker, an LED (light emitting diode (Light Emitting Diode)) lamp, or the like) that performs output to the outside. The input device 1005 and the output device 1006 may be integrated (for example, a touch panel).

The processor 1001, the memory 1002, and other devices are connected by a bus 1007 for information communication. The bus 1007 may be formed using a single bus or may be formed using a bus different between devices.

The radio base station 10 and the user terminal 20 may be configured to include hardware such as a microprocessor, a digital signal processor (DSP: digital Signal Processor), an ASIC (application specific integrated circuit (Application Specific Integrated Circuit)), a PLD (programmable logic device (Programmable Logic Device)), and an FPGA (field programmable gate array (Field Programmable Gate Array)), or may be configured to implement some or all of the functional blocks by using the hardware. For example, the processor 1001 may also be implemented with at least 1 of these hardware.

(modification)

In addition, with respect to terms described in the present specification and/or terms required for understanding of the present specification, terms having the same or similar meanings may be substituted. For example, the channel and/or symbol may also be a signal (signaling). In addition, the signal may also be a message. The reference signal can also be simply referred to as RS (Reference Signal) and may also be referred to as Pilot (Pilot), pilot signal, etc., depending on the criteria of the application. In addition, the component carrier (CC: component Carrier) may also be referred to as a cell, a frequency carrier, a carrier frequency, etc.

In addition, a radio frame may be composed of 1 or more periods (frames) in the time domain. Each of the 1 or more periods (frames) constituting the radio frame may also be referred to as a subframe. Further, a subframe may be formed of 1 or more slots in the time domain. The subframes may also be a fixed length of time (e.g. 1 ms) independent of the parameter set (Numerology).

Further, a slot (slot) may also be formed of 1 or more symbols (OFDM (orthogonal frequency division multiplexing (Orthogonal Frequency Division Multiplexing)) symbols, SC-FDMA (single carrier frequency division multiple access (Single Carrier Frequency Division Multiple Access)) symbols, or the like in the time domain. Furthermore, the time slots may also be time units based on parameter sets. In addition, a slot may also contain multiple mini-slots. Each mini slot (mini slot) may also be formed of 1 or more symbols in the time domain. In addition, the mini-slot may also be referred to as a sub-slot (sub slot).

The radio frame, subframe, slot, mini-slot, and symbol each represent a unit of time when a signal is transmitted. Other designations of radio frames, subframes, slots, mini-slots, and symbols corresponding to each may also be used. For example, 1 subframe may also be referred to as a transmission time interval (TTI: transmission Time Interval), a plurality of consecutive subframes may also be referred to as TTIs, and 1 slot or 1 mini slot may also be referred to as a TTI. That is, the subframe and/or TTI may be a subframe (1 ms) in the conventional LTE, may be a period (for example, 1 to 13 symbols) shorter than 1ms, or may be a period longer than 1 ms. The unit indicating the TTI may be called a slot, a mini-slot, or the like instead of a subframe.

Here, TTI refers to, for example, a scheduled minimum time unit in wireless communication. For example, in the LTE system, a radio base station performs scheduling for each user terminal to allocate radio resources (frequency bandwidth, transmission power, and the like that can be used in each user terminal) in TTI units. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit of a data packet (transport block), a code block, and/or a codeword after channel coding, or may be a processing unit such as scheduling or link adaptation. In addition, when a TTI is given, the time interval (e.g., the number of symbols) in which transport blocks, code blocks, and/or codewords are actually mapped may be shorter than the TTI.

In addition, when 1 slot or 1 mini slot is called TTI, 1 or more TTI (i.e., 1 or more slot or 1 or more mini slot) may be the minimum time unit for scheduling. Further, the number of slots (the number of mini slots) constituting the minimum time unit of the schedule can be controlled.

A TTI having a duration of 1ms may also be referred to as a normal TTI (TTI in LTE rel.8-12), a standard TTI, a long TTI, a normal subframe, a standard subframe, a long subframe, or the like. A TTI that is shorter than a normal TTI may also be referred to as a shortened TTI, a short TTI, a partial or fractional TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, or the like.

In addition, a long TTI (e.g., a normal TTI, a subframe, etc.) may also be interpreted as a TTI having a duration exceeding 1ms, and a short TTI (e.g., a shortened TTI, etc.) may also be interpreted as a TTI having a TTI length less than the TTI length of the long TTI and a TTI length of 1ms or more.

A Resource Block (RB) is a Resource allocation unit of a time domain and a frequency domain, and may include 1 or more consecutive subcarriers (subcarriers) in the frequency domain. Further, the RB may contain 1 or more symbols in the time domain, and may be 1 slot, 1 mini slot, 1 subframe, or 1 TTI in length. 1 TTI and 1 subframe may be each composed of 1 or more resource blocks. In addition, 1 or more RBs may also be referred to as Physical resource blocks (PRB: physical RBs), subcarrier groups (SCG: sub-Carrier groups), resource element groups (REG: resource Element Group), PRB pairs, RB peering.

Furthermore, a Resource block may also be composed of 1 or more Resource Elements (REs). For example, 1 RE may be a radio resource region of 1 subcarrier and 1 symbol.

The structures of the radio frame, the subframe, the slot, the mini-slot, the symbol, and the like described above 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 mini-slots included in a slot, the number of symbols and RBs included in a slot or mini-slot, the number of subcarriers included in an RB, the number of symbols in a TTI, the symbol length, the Cyclic Prefix (CP) length, and the like can be variously changed.

The information, parameters, and the like described in this specification may be expressed by absolute values, relative values to predetermined values, or other corresponding information. For example, the radio resource may be indicated by a predetermined index.

In the present specification, the names used for parameters and the like are not limitative in all aspects. For example, various channels (PUCCH (physical uplink control channel (Physical Uplink Control Channel)), PDCCH (physical downlink control channel (Physical Downlink Control Channel)), and the like) and information elements can be identified according to any appropriate names, and thus the various names assigned to these various channels and information elements are not limiting names in all respects.

Information, signals, etc. described in this specification may be represented using any of a variety of different technologies. For example, data, instructions, commands, information, signals, bits, symbols, chips (chips), and the like may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any combination thereof.

Further, information, signals, and the like may be output from a higher layer (upper layer) to a lower layer (lower layer), and/or from a lower layer (lower layer) to a higher layer (upper layer). Information, signals, etc. may also be input and output via a plurality of network nodes.

The input/output information, signals, and the like may be stored in a specific location (for example, a memory), or may be managed by a management table. The input/output information, signals, and the like may be rewritten, updated, or added. The outputted information, signals, etc. may also be deleted. The input information, signals, etc. may also be transmitted to other devices.

The information notification is not limited to the embodiment described in the present specification, and may be performed by other methods. For example, the notification of information may also be implemented by physical layer signaling (e.g., downlink control information (DCI: downlink Control Information)), uplink control information (UCI: uplink Control Information)), higher layer signaling (e.g., RRC (radio resource control (Radio Resource Control)) signaling, broadcast information (master information block (MIB: master Information Block), system information block (SIB: system Information Block), etc.), MAC (medium access control (Medium Access Control)) signaling), other signals, or a combination thereof.

The physical Layer signaling may be referred to as L1/L2 (Layer 1/Layer 2) control information (L1/L2 control signal), L1 control information (L1 control signal), or the like. In addition, the RRC signaling may also be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like. In addition, the MAC signaling may also be notified using, for example, a MAC Control Element (MAC CE).

Note that the notification of the predetermined information (for example, the notification of "X") is not limited to the explicit notification, and may be performed implicitly (for example, by not notifying the predetermined information or by notifying another information).

The determination may be performed based on a value (0 or 1) represented by 1 bit, a true or false value (boolean) represented by true or false, or a comparison of a numerical value (e.g., a comparison with a predetermined value).

Software, whether referred to as software (firmware), middleware (middleware-ware), microcode (micro-code), hardware description language (hardware descriptive term), or other names, should be broadly interpreted as meaning instructions, instruction sets, codes (codes), code segments (code fragments), program codes (program codes), programs (programs), subroutines (sub-programs), software modules (software modules), applications (applications), software applications (software application), software packages (software packages), routines (routines), subroutines (sub-routines), objects (objects), executable files, threads of execution, procedures, functions, and the like.

In addition, software, instructions, information, etc. may also be transmitted and received via a transmission medium. For example, where software is transmitted from a website, server, or other remote source (remote source) using wired (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL: digital Subscriber Line), etc.) and/or wireless technologies (infrared, microwave, etc.), the wired and/or wireless technologies are included in the definition of transmission medium.

The terms "system" and "network" as used in this specification may be used interchangeably.

In the present specification, terms such as "Base Station", "radio Base Station", "eNB", "gNB", "cell", "sector", "cell group", "carrier", and "component carrier" are used interchangeably. A base station may be called a fixed station (eNB), a NodeB, an eNodeB (eNodeB), an access point (access point), a transmission point, a reception point, a transmission/reception point, a femto cell, a small cell, or the like.

A base station can accommodate 1 or more (e.g., three) cells (also referred to as sectors). In the case of a base station accommodating a plurality of cells, the coverage area of the base station can be divided into a plurality of smaller areas as a whole, and each of the smaller areas can also provide communication services through a base station subsystem (e.g., a small base station for indoor use (RRH: remote Radio Head, remote radio head)). The term "cell" or "sector" refers to a portion or all of the coverage area of a base station and/or base station subsystem that is in communication service in that coverage area.

In the present specification, terms of "Mobile Station", "User terminal", "User Equipment (UE), and" terminal "are used interchangeably.

A mobile station is sometimes referred to as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal, handheld device, user agent, mobile client, or some other suitable terminology.

The base station and/or mobile station may also be referred to as a transmitting device, a receiving device, etc.

In addition, the radio base station in the present specification may be interpreted as a user terminal. For example, the embodiments of the present invention can be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (Device-to-Device (D2D)). In this case, the user terminal 20 may have the functions of the radio base station 10. The terms "upstream" and "downstream" may also be interpreted as "side". For example, the uplink channel may be interpreted as a side channel (side channel).

Similarly, the user terminal in the present specification can be interpreted as a radio base station. In this case, the radio base station 10 may have the function of the user terminal 20.

In the present specification, the operation performed by the base station may be performed by an upper node (upper node) thereof, as the case may be. In a network including 1 or more network nodes (network nodes) having a base station, it is apparent that various operations performed for communication with a terminal may be performed by the base station, 1 or more network nodes other than the base station (for example, consider MME (Mobility Management Entity, mobility management entity), S-GW (Serving-Gateway), etc., but not limited thereto), or a combination thereof.

The embodiments described in the present specification may be used alone, may be used in combination, or may be used in a manner that is switched in accordance with execution. The processing procedures, timings, flowcharts, and the like of the embodiments and the embodiments described in this specification may be changed in order as long as they are not contradictory. For example, elements of the various steps are presented in the order illustrated with respect to the methods described in this specification, but are not limited to the particular order presented.

The modes and embodiments described in this specification can be applied to LTE (long term evolution (Long Term Evolution)), LTE-a (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (fourth generation mobile communication system (4 th generation mobile communication system)), 5G (fifth generation mobile communication system (5 th generation mobile communication system)), FRA (future Radio access (Future Radio Access)), new-RAT (Radio access technology (Radio Access Technology)), NR (New Radio), NX (New Radio access)), FX (next generation Radio access (Future generation Radio access)), GSM (registered trademark) (global system for mobile communication (Global System for Mobile communications)), CDMA2000, UMB (Ultra mobile broadband (Ultra Mobile Broadband)), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-wide-band)), bluetooth (registered trademark), wireless methods using other Radio access (registered trademark), and/or systems based on these, as appropriate.

The term "based on" used in the present specification does not mean "based only on" unless otherwise specified. In other words, the expression "based on" means "based only on" and "based at least on" both.

Any reference to elements in the specification referred to as "first," "second," etc. does not necessarily have to be construed as entirely limiting the amount or order of those elements. These designations may be used in this specification as a convenient way of distinguishing between 2 or more elements. Thus, reference to first and second elements does not indicate that only 2 elements may be employed, or that the first element must take precedence over the second element in some manner.

The term "determining" as used in this specification includes various actions in some cases. For example, the term "judgment (decision)" may be regarded as a case where "judgment (decision)" is performed on calculation (computing), processing (processing), derivation (research), investigation (research), search (lookup) (e.g., search in a table, database, or another data structure), confirmation (evaluation), or the like. Further, "determination (decision)" may be regarded as a case where "determination (decision)" is made on a reception (e.g., receiving information), a transmission (e.g., transmitting information), an input (input), an output (output), an access (e.g., accessing data in a memory), or the like. Further, "judgment (decision)" may be regarded as a case where "judgment (decision)" is made for resolution (resolution), selection (selection), selection (setting), establishment (establishment), comparison (comparison), and the like. That is, the "judgment (decision)" can also be regarded as a case where some actions are "judged (decided)".

As used in this specification, the terms "connected", "coupled", or all variations thereof mean all connections or couplings directly or indirectly between 2 or more elements, and can include cases where 1 or more intermediate elements exist between 2 elements "connected" or "coupled" to each other. The combination or connection of the elements may be physical, logical, or a combination thereof. For example, "connection" may also be interpreted as "access".

In the present specification, when 2 elements are connected, it can be considered that 1 or more electric wires, cables, and/or printed electric connections are used, electromagnetic energy having wavelengths in a wireless frequency domain, a microwave domain, and/or an optical (both visible and invisible) domain is used as several non-limiting and non-inclusive examples, and the like are "connected" or "joined" to each other.

In the present specification, the term "a is different from B" may mean that "a is different from B". Terms such as "separating," "combining," and the like may also be construed as well.

In the case where "including", and variations thereof are used in the present specification or claims, these terms are meant to be inclusive as the term "having". Further, the term "or" as used in the present specification or claims does not mean exclusive or.

While the present invention has been described in detail, it will be apparent to those skilled in the art that the present invention is not limited to the embodiments described in the present specification. The present invention can be implemented as a modification and variation without departing from the spirit and scope of the present invention, which is defined based on the description of the claims. Accordingly, the description of the present specification is for the purpose of illustration and description, and is not intended to limit the present invention in any way.

Claims

1. A terminal, characterized by comprising:

a reception unit that receives a wake-up signal WUS using one of periodic radio resources that are time-multiplexed or frequency-multiplexed with at least one of a downlink shared channel, a control resource set including a downlink control channel that schedules the downlink shared channel, and a synchronization signal block; and

and a control unit for controlling the reception of the downlink control channel in response to the reception of the WUS.

2. The terminal of claim 1, wherein the terminal comprises a base station,

the control resource set and the downlink shared channel are frequency multiplexed with the synchronization signal block, the downlink shared channel is time multiplexed with the control resource set,

The control unit detects the synchronization signal block after detecting the WUS, and then decodes the downlink control channel included in the control resource set.

3. The terminal of claim 1, wherein the terminal comprises a base station,

the control resource set is time multiplexed with the synchronization signal block, the downlink shared channel is time multiplexed with the control resource set,

4. The terminal of claim 1, wherein the terminal comprises a base station,

the time resources of the synchronization signal block are different from the time resources of the set of control resources,

the frequency resources of the synchronization signal block are different from the frequency resources of the set of control resources,

the downlink shared channel is frequency multiplexed with the synchronization signal block and time multiplexed with the control resource set,

5. A wireless communication method of a terminal, comprising:

a step of receiving a wake-up signal WUS using one of periodic radio resources time-multiplexed or frequency-multiplexed with at least one of a downlink shared channel, a control resource set including a downlink control channel scheduling the downlink shared channel, and a synchronization signal block; and

and controlling the reception of the downlink control channel in response to the reception of the WUS.

6. A base station, comprising:

a control unit that allocates a wake-up signal WUS to one of periodic radio resources that are time-multiplexed or frequency-multiplexed with at least one of a downlink shared channel, a control resource set including a downlink control channel that schedules the downlink shared channel, and a synchronization signal block; and

and the sending unit is used for sending the WUS signal to the terminal and controlling the receiving of a downlink control channel in the terminal.

7. A system having a terminal and a base station,

the terminal has:

A control unit for controlling the reception of the downlink control channel in response to the reception of the WUS,

the base station has:

and a transmitting unit for transmitting the WUS.