WO2019138503A1

WO2019138503A1 - User equipment and radio communication method

Info

Publication number: WO2019138503A1
Application number: PCT/JP2018/000502
Authority: WO
Inventors: 和晃武田; 大樹武田
Original assignee: 株式会社Ｎｔｔドコモ
Priority date: 2018-01-11
Filing date: 2018-01-11
Publication date: 2019-07-18
Also published as: CN111567007A; CN111567007B

Abstract

The purpose of the present invention is to suppress power consumption of a user equipment in a future radio communication system. The user equipment has: a reception unit for receiving a predetermined signal by using one of periodical radio resources that is either time-multiplexed or frequency-multiplexed with at least one of a downlink shared channel, a control resource set including a downlink control channel for scheduling the downlink shared channel, and a synchronization signal block; and a control unit for controlling reception of the downlink control channel upon receipt of the predetermined signal.

Description

User terminal and wireless communication method

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

In Universal Mobile Telecommunications System (UMTS) networks, Long Term Evolution (LTE) has been specified for the purpose of further high data rates, low delays, etc. (Non-Patent Document 1). In addition, LTE-A (LTE Advanced, LTE Rel. 10, 11, 12, 13) has been specified for the purpose of further increasing the capacity and upgrading the LTE (LTE Rel. 8, 9).

LTE successor system (for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), 5G + (plus), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Also referred to as Rel. 14 or 15).

In the existing LTE system (for example, LTE Rel. 8-13), a user terminal (UE: User Equipment) is synchronized with an initial access procedure (also called cell search etc.) (SS: Synchronization Signal), for example. , PSS (Primary Synchronization Signal) and / or SSS (Secondary Synchronization Signal) are detected, and synchronization with the network (for example, base station (eNB (eNode B))) and identification of connected cells are performed. (Eg, identify by cell ID (Identifier)).

Moreover, in the existing LTE system (for example, LTE Rel. 8-13), in order to reduce the power consumption of the user terminal, the operation of discontinuous reception (DRX: Discontinuous Reception) is supported in the idle state (idle mode). There is. Also, the idle user terminal controls RSRP / RSRQ measurement for cell reselection, monitoring / reception of a paging channel (PCH), etc. based on the DRX cycle. An incoming call, a change in broadcast information (system information), an ETWS, etc. are notified to the user terminal by a paging channel (Paging channel).

In future wireless communication systems (for example, NR or 5G), synchronization signals (also referred to as SS, PSS and / or SSS, or NR-PSS and / or NR-SSS, etc.) and broadcast channels (broadcast signals, PBCH) Alternatively, it is considered to define a signal block (also referred to as SS / PBCH block or SS / PBCH block or the like) including NR-PBCH or the like. In addition, it is considered to define a radio resource (also referred to as a control resource block, CORESET, etc.) for the downlink control channel.

When the user terminal monitors such a signal configuration, power consumption of the user terminal may be increased.

This invention is made in view of this point, and it aims at providing the user terminal and radio | wireless communication method which can suppress the power consumption of a user terminal in the future radio | wireless communications system.

A user terminal according to an aspect of the present invention is periodically time-multiplexed or frequency-multiplexed on at least one of a downlink shared channel, a control resource set including a downlink control channel for scheduling the downlink shared channel, and a synchronization signal block. And a control unit configured to control reception of the downlink control channel according to the reception of the predetermined signal using one of the wireless resources.

According to the present invention, it is possible to suppress the power consumption of the user terminal in the future wireless communication system.

It is a figure which shows an example of WUS transmission in a WUS resource. FIGS. 2A to 2C are diagrams showing an example of arrangement patterns of the SS block, CORESET, and PDSCH. It is a figure which shows an example of arrangement | positioning of the pattern 3. FIG. It is a figure which shows an example of the multiplexing method 1-1. FIG. 18 is a diagram illustrating an example of multiplexing method 1-2. 6A-6D illustrate some examples of multiplexing method 1-2. It is a figure which shows an example of the multiplexing method 1-3. It is a figure which shows an example of the multiplexing method 1-4. It is a figure which shows an example of the multiplexing method 1-5. 10A to 10D are diagrams showing an example of a method of multiplexing WUS on pattern 1 in the case where SS blocks and CORESET continue in the time domain. It is a figure which shows an example of the method of multiplexing WUS to the pattern 1 in case SS block and CORESET are separated in a time-domain. 12A to 12D illustrate an example of the WUS multiplexing method for pattern 2. FIG. It is a figure which shows an example of schematic structure of the radio | wireless communications system which concerns on this Embodiment. It is a figure which shows an example of the whole structure of the wireless base station which concerns on this Embodiment. It is a figure which shows an example of a function structure of the wireless base station which concerns on this Embodiment. It is a figure which shows an example of the whole structure of the user terminal which concerns on this Embodiment. It is a figure which shows an example of a function structure of the user terminal which concerns on this Embodiment. It is a figure which shows an example of the hardware constitutions of the wireless base station which concerns on this Embodiment, and a user terminal.

In the existing 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 the scheduling (DL assignment) information included in the DCI, the paging message transmitted on the downlink shared channel (PDSCH) is acquired. As the DCI, DCI (DCI format 1A or DCI format 1C) scrambled by a paging identifier (P-RNTI: Paging-Radio Network Temporary Identifier) is used.

The paging message transmitted by the wireless base station includes a paging record (Paging Record) for each user terminal, change indication information of system information (for example, SystemInfoModification), ETWS (Earthquake and Tsunami Warning System), CMAS (Commercial Mobile Alert Service) And notifications such as EAB (Extended Access Barring) can be included.

Paging timing at which a user terminal detects a paging channel is a paging occasion (PO: Paging Occasion) indicating a subframe in which DCI scrambled with P-RNTI is transmitted and a radio frame (PO: Paging Frame) including PO. And is set based on. The user terminal detects (monitors) a paging channel based on PO and PF. The user terminal in the idle state can reduce power consumption by performing the reception operation (DRX) only during a period in which the paging channel needs to be monitored, and putting it in the sleep state or the power saving state in the other periods. The paging channel may be considered to include a downlink control channel for transmitting DCI scrambled by P-RNTI, and a downlink shared channel for which allocation is instructed by the DCI and for transmitting a paging message.

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

A wake-up signal (WUS) for the purpose of power saving of IoT (Internet of Things) UE (for example, NB (Narrow Band) -IoT, eMTC (enhanced Machine Type Communication)) It is being considered. The UE controls the reception of other signals in response to the reception of WUS. WUS may be called an activation signal, an awakening signal, a start instruction signal, a reception instruction signal, a paging instruction signal, a PDCCH monitoring trigger signal, or the like. WUS may be supported for idle mode UEs and may be supported for RRC connected mode UEs.

WUS is also considered in NR.

For example, as shown in FIG. 1, the NW (eg, a radio base station) configures periodic WUS resources in the UE. The UE enters the power saving state (sleep state) in a period other than the WUS resource. The UE monitors WUS in WUS resources.

When a paging message for the UE occurs, the NW transmits WUS using WUS resources. The UE receives the downlink control channel and / or the downlink shared channel upon detecting the WUS. For example, upon detecting WUS, the UE receives a PDCCH in a control resource set for paging (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). Also, the process of WUS detection may be simpler than the process of downlink control channel detection. Therefore, when WUS is monitored periodically, power consumption can be reduced as compared with the case where the downlink control channel is monitored periodically.

By the way, future wireless communication systems (for example, 5G, NR) are expected to realize various wireless communication services so as to satisfy different requirements (for example, ultra high speed, large capacity, very low delay, etc.) It is done. For example, in the future wireless communication system, as described above, it is considered to perform communication using beam forming (BF: Beam Forming).

BF can be classified into digital BF and analog BF. Digital BF is a method of performing precoding signal processing (for digital signals) on a baseband. In this case, parallel processing of Inverse Fast Fourier Transform (IFFT) / Digital to Analog Converter (DAC) / Radio Frequency (RF) is required as many as the number of antenna ports (RF chains). Become. On the other hand, it is possible to form as many beams as the number of RF chains at any timing.

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

For this reason, when a base station (for example, called eNB (evolved Node B), BS (Base Station), etc.) has only one phase shifter, one beam can be formed at a certain time. Therefore, when transmitting a plurality of beams using only analog BF, it is not possible to transmit simultaneously on the same resource, and it is necessary to temporally switch or rotate the beams.

Synchronization signals (also referred to as SS, PSS and / or SSS, or NR-PSS and / or NR-SSS, etc.) and broadcast in future wireless communication systems (for example, LTE Rel. 14 or later, 5G or NR, etc.) It is considered to define a signal block (also referred to as SS block (SSB), SS / PBCH block or the like) including a channel (also referred to as broadcast signal, PBCH, or NR-PBCH or the like). A set of one or more signal blocks is also referred to as a signal burst (SS / PBCH burst or SS burst). A plurality of signal blocks in the signal burst are transmitted with different beams at different times (also referred to as beam sweep etc.).

The SS / PBCH block is composed of one or more symbols (eg, OFDM symbols). Specifically, the SS / PBCH block may be composed of a plurality of consecutive symbols. In the SS / PBCH block, PSS, SSS and NR-PBCH may be arranged in one or more different symbols. For example, the SS / PBCH block is also considered to constitute an SS / PBCH block with four or five symbols including one symbol PSS, one symbol SSS, and two or three symbols PBCH.

A set of one or more SS / PBCH blocks may be referred to as SS / PBCH bursts. The SS / PBCH burst may be composed of SS / PBCH blocks in which frequency and / or time resources are continuous, and may be composed of SS / PBCH blocks in which frequency and / or time resources are non-consecutive. The SS / PBCH burst may be set with a predetermined period (which may be called an SS / PBCH burst period) or may be set with a non-period.

Also, one or more SS / PBCH bursts may be referred to as an SS / PBCH burst set (SS / PBCH burst series) or as an SS block period. The SS / PBCH burst set is set periodically. The user terminal may control reception processing assuming that SS / PBCH burst sets are transmitted periodically (with SS / PBCH burst set period).

Each SS / PBCH block in the SS / PBCH burst set is identified by a predetermined index (SS / PBCH index). The SS / PBCH index may be any information uniquely identifying the SS / PBCH block in the SS burst set, and may correspond to the time index.

The user terminal is able to set spatial, average gain, delay and Doppler parameters between SS / PBCH burst sets and between SS / PBCH blocks having the same SS / PBCH index. Quasi-collocation (QCL) for at least one may be assumed.

Here, pseudo co-location (QCL) refers to space (beam) used for transmission of different SS / PBCH blocks, and at least one of average gain, delay and Doppler parameters between the multiple SS / PBCH blocks is identical. Say that it can be assumed that

Also, the user terminal may perform at least one of space, average gain, delay, and Doppler parameters between SS / PBCH blocks and SS / PBCH blocks having different SS / PBCH indexes within the SS / PBCH burst set. Pseudo colocation may not be assumed.

CORESET for PDCCH scheduling PDSCH carrying Remaining Minimum System Information (RMSI) may 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 CORESET for RMSI configured based on the PBCH, and read the RMSI from the PDSCH scheduled for the PDCCH.

The following patterns 1 to 3 have been considered for time division multiplexing (TDM) and / or frequency division multiplexing (FDM) between SS block and RMSI CORESET.

In pattern 1 shown in FIG. 2A, the SS block and CORESET are TDM. Furthermore, CORESET and PDSCH are TDM. In the time direction, the first is the SS block, the second is CORESET, and the second is PDSCH.

In pattern 2 shown in FIG. 2B, the SS block and PDSCH are FDM, and CORESET and PDSCH are TDM. The SS block and the CORESET do not overlap in the time direction, and the SS block and the CORESET do not overlap in the frequency direction. In the temporal direction, the first is CORESET and the next is SS block and PDSCH.

In pattern 3 shown in FIG. 2C, SS block and CORESET are FDM. Furthermore, SS block and PDSCH are FDM, and CORESET and PDSCH are TDM. In the temporal direction, the first is CORESET and the next is PDSCH.

Also, CORESET for PDCCH scheduling PDSCH carrying paging messages may be referred to as CORESET for paging (Paging CORESET). The CORESET for RMSI and the CORESET for paging may be a common CORESET. In other words, the PDSCH associated with a particular CORESET may carry the RMSI and paging messages.

However, the relationship between SS block, CORESET, and PDSCH and WUS has not yet been considered.

Therefore, the present inventors examined a method of frequency multiplexing and / or time multiplexing WUS in at least one of SS block, CORESET, and PDSCH, and reached the present invention.

For example, WUS is associated with PDSCH carrying RMSI and / or paging messages, CORESET for PDCCH scheduling that PDSCH, and SS block associated with CORESET.

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

Radio resources can be efficiently utilized by frequency multiplexing and / or time multiplexing WUS to at least one of SS block, CORESET, and PDSCH. Since the UE can decode the PDCCH and PDSCH associated with the WUS in response to the detection of the WUS, the power consumption of the UE can be reduced and the increase in UE operation can be suppressed.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. In the following, PDSCH may refer to PDSCH carrying RMSI and / or paging messages simply as PDSCH. CORESET for PDCCH scheduling its PDSCH may be simply referred to as CORESET.

(First aspect)
In the first aspect, a method of multiplexing WUS on pattern 3 will be described.

FIG. 3 is a view 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 be separated in the time direction (may be discontinuous).

When analog BF (beam sweeping) is applied, different beams (transmit beam or receive beam) may be applied to two patterns in one signal set.

The time length of the SS block is 4 symbols. The time length of CORESET is one symbol, and FDM is performed on the first symbol of the SS block. The time length of PDSCH is 3 symbols, and FDM is applied to the 2nd to 4th symbols of the SS block and is TDMed to CORESET. Two SS blocks consecutive in the time direction may be referred to as SS bursts or SS burst sets.

In the case of performing the analog BF, the pattern 3 can suppress the time length of the pattern. For example, WUS can be placed in the symbol of the SS block. Therefore, since many patterns can be arranged in a short time, many beams can be swept in a short time.

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

<Multiplexing method 1-1>
For pattern 3, WUS resources may be FDM to CORESET.

As shown in FIG. 4, when the CORESET band is narrower than the PDSCH band, the WUS resource may be allocated to a part or all of the bands other than the CORESET among the PDSCH bands.

When an RMSI and / or a paging message occurs, WUS may be transmitted on WUS resources in the signal set including the RMSI and / or the paging message. Also, if WUS is transmitted periodically, the period of WUS may be longer than the period of signal set.

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

WUS resources may or may not be contiguous in the frequency domain.

By arranging WUS and CORESET in the leading symbol of the pattern, the UE can perform WUS detection and PDCCH decoding in CORESET in one symbol.

<Multiplexing method 1-2>
For pattern 3, WUS resources may be FDM into SS blocks.

As shown in FIG. 5, WUS resources may be placed across symbols of SS blocks. The WUS of the multiplexing method 1-2 is shorter in the frequency direction and longer in the time direction than the multiplexing method 1-1.

If the WUS resource is 4 symbols, the UE may hold CORESET for 4 symbols until detecting WUS, holds PDSCH for 3 symbols, and receives CORESET and PDSCH after WUS is detected. You may go. The UE may determine the detection of WUS before receiving all WUS.

FIG. 6 is a diagram illustrating some examples of WDM resources and FDM methods of SS blocks.

As shown in FIG. 6A, WUS resources may be placed in a band outside the SS block for the pattern. The WUS resources may be allocated to a band adjacent to the SS block or may be allocated to a band separate from the SS block.

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

As shown in FIG. 6C, WUS resources may be placed in a band outside the PDSCH for the pattern. The WUS resources may be allocated to a band adjacent to the PDSCH or may be allocated to a band separate from the PDSCH.

As shown in FIG. 6D, WUS resources may be arranged in multiple bands. The plurality of bands may be bands outside the SS block with respect to the pattern and bands between the PDSCH and the SS block. The plurality of bands may be a band outside the PDSCH with respect to the pattern and a band between the PDSCH and the SS block. The plurality of bands may be a band outside the PDSCH for the pattern and a band outside the SS block for the pattern.

<Multiplexing method 1-3>
For pattern 3, WUS resources may be TDM into SS blocks.

As shown in FIG. 7, if two patterns in one signal set are separated from one another, WUS resources may be placed before SS block in the time domain. The WUS resources may be allocated to symbols adjacent to the SS block or may be allocated to symbols distant from the SS block.

If the SS block is set to be non-consecutive, multiplexing methods 1-3 may be used.

The band of WUS may be the same as the band of SS block, or may be different from at least a part of the band of SS block.

In the time domain, since CORESET is placed after WUS, the UE decodes PDCCH in CORESET after detecting WUS. This sequential process can reduce the load on the UE.

<Multiplexing method 1-4>
For pattern 3, WUS resources may be TDM to CORESET.

As shown in FIG. 8, if the two patterns in one signal set are separated from one another, WUS resources may be placed before CORESET in the time domain. WUS resources may be located on symbols adjacent to CORESET, or may be located on symbols away from CORESET.

If the SS block is set discontinuously, multiplexing method 1-4 may be used.

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

<Multiplication method 1-5>
For pattern 3, WUS resources may be TDM to SS block and CORESET.

As shown in FIG. 9, a plurality of different WUS resources may be collectively allocated (the number of resources is two in FIG. 9) before repeatedly transmitting the SS block, the CORESET, and the PDSCH. At this time, the number of resources of WUS may be the same as the number of SS blocks, or different values may be set by higher layer signaling.

As shown in FIG. 9, WUS resources may be allocated to part or all of the SS block, CORESET, and PDSCH bands, and WUS resources may be allocated to frequency positions not overlapping these bands. .

By collectively arranging WUS resources before SS blocks, CORESETs, and PDSCHs that are repeatedly transmitted, it is possible to monitor only WUS resources in a short time, and power consumption of the UE can be suppressed.

According to the first aspect, WUS multiplexing can prevent an increase in beam sweeping time.

(Second aspect)
In the second aspect, a method of multiplexing WUS on pattern 1 will be described.

FIG. 10 is a diagram showing an example of a method of multiplexing WUS on pattern 1 in the case where the SS block and CORESET continue in the time domain.

As shown in FIG. 10A, WUS resources may be FDM into SS blocks. The WUS resources may be allocated to a band adjacent to the SS block or may be allocated to a band separate from the SS block.

As shown in FIG. 10B, WUS resources may be FDM to CORESET. WUS resources may be located in a band adjacent to CORESET or may be located in a band away from CORESET. The bands of WUS resource and CORESET may be in the band of PDSCH. The band of WUS resource and CORESET may be the same as the band of the SS block, or may be different from at least a part of the band of the SS block. By arranging WUS and CORESET in one symbol, the UE can perform WUS detection and PDCCH decoding in CORESET in one symbol.

As shown in FIG. 10C, WUS resources may be TDM into SS blocks and may be placed before SS blocks in the time domain. The WUS resources may be allocated to symbols adjacent to the SS block or may be allocated to symbols distant from the SS block.

As shown in FIG. 10D, WUS resources may be TDM to PDSCH and may be placed after PDSCH in the time domain. WUS resources may be allocated to symbols adjacent to PDSCH or may be allocated to symbols distant from PDSCH.

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

WUS resources may be TDM into SS blocks and may be placed between SS blocks and CORESET in the time domain. The WUS resources may be located in symbols away from the SS block and CORESET, or may be located in symbols adjacent to at least one of the SS block and CORESET.

In FIG. 10A, FIG. 10C, and FIG. 11, since CORESET is allocated after WUS in the time domain, the UE decodes PDCCH in CORESET after detecting WUS. This sequential process can reduce the load on the UE.

In FIG. 10B, since the WUS resource and CORESET are allocated to the same symbol, the UE can perform WUS detection and PDCCH decoding in CORESET in one symbol.

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

(Third aspect)
In the third aspect, a method of multiplexing WUS on pattern 2 will be described.

As shown in FIG. 12A, WUS resources may be FDM to CORESET and TDM to PDSCH. WUS resources may be located in a band adjacent to CORESET or may be located in a band away from CORESET. The WUS resource and the CORESET band may be part of the PDSCH band or may be identical to the PDSCH band. By arranging WUS and CORESET in one symbol, the UE can perform WUS detection and PDCCH decoding in CORESET in one symbol.

As shown in FIG. 12B, WUS resources may be FDM into SS blocks. The WUS resources may be allocated to a band adjacent to the SS block or may be allocated to a band separate from the SS block. The plurality of symbols in which the WUS resource is arranged may be identical to the plurality of symbols in which the SS block is arranged, or may be part of a plurality of symbols in which the SS block is arranged.

As shown in FIG. 12C, WUS resources may be FDM to CORESET and TDM to SS block. 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 resource may be located in a zone separate from CORESET or may be located in a zone adjacent to CORESET. By arranging WUS and CORESET in one symbol, the UE can perform WUS detection and PDCCH decoding in CORESET in one symbol.

As shown in FIG. 12D, WUS resources may be TDM on PDSCH and FDM on SS block. The bandwidth of the WUS resource may be identical to the bandwidth of PDSCH or may be part of the bandwidth of PDSCH. The WUS resources may be allocated to a band adjacent to the SS block or may be allocated to a band separate from the SS block. The WUS resources may be located after the PDSCH or may be located before the PDSCH in the time domain.

In FIG. 12A and FIG. 12C, since the WUS resource and the CORESET are arranged in the same symbol, the UE can perform WUS detection and PDCCH decoding in the CORESET in one symbol.

According to the third aspect, WUS can be multiplexed without increasing the time length (number of symbols) of pattern 2 because WUS is multiplexed into the time resource and frequency resource of pattern 2. Thus, WUS multiplexing or beam sweeping time can be prevented from increasing.

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

(Fourth aspect)
In a fourth aspect, UE operation for WUS will be described.

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

The UE may detect WUS in a state where synchronization has not been established. Also, the UE may establish coarse synchronization using WUS. If the UE can detect WUS in a non-synchronized state, it detects WUS, then detects SS block (or only PSS and SSS of SS block), and then decodes PDCCH in CORESET You may The UE may establish fine synchronization using the PSS and SSS in the SS block when establishing coarse synchronization using WUS.

The UE may establish synchronization using WUS. The UE may detect WUS and then decode the PDCCH in CORESET if it can establish synchronization using WUS, or if synchronization is already established. In this case, the UE may not detect the SS block.

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

The UE that has decoded the PDCCH decodes the RMSI and / or the paging message in the PDSCH scheduled by the PDCCH.

WUS resources may be configured by broadcast information (eg, RMSI) or higher layer signaling (eg, RRC signaling). WUS resources for UEs in idle mode may be configured by the RMSI. WUS resources for grouped UEs may be configured by RRC signaling. WUS resources for UEs in RRC connected mode may be configured by RRC signaling.

The bandwidth of the WUS may not be dependent on the channel bandwidth (network bandwidth). The bandwidth of WUS may be a fixed value according to the specification. Also, the bandwidth of WUS may be dependent on subcarrier spacing.

(Wireless communication system)
Hereinafter, the configuration of the radio communication system according to the present embodiment will be described. In this wireless communication system, communication is performed using 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 a wireless communication system according to the present embodiment. The radio communication system 1 applies carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are integrated. can do.

The wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th Generation mobile communication system), 5G It may be called (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR or the like, or it may be called a system for realizing these.

The radio communication system 1 includes a radio base station 11 forming a macrocell C1 with a relatively wide coverage, and radio base stations 12 (12a to 12c) disposed in the macrocell C1 and forming a small cell C2 narrower than the macrocell C1. And. Moreover, the user terminal 20 is arrange | positioned at macro cell C1 and each small cell C2.

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

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

Between the wireless base station 11 and the wireless base station 12 (or between two wireless base stations 12), a wired connection (for example, an optical fiber conforming to a Common Public Radio Interface (CPRI), an X2 interface, etc.) or a wireless connection Can be configured.

The radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30. The upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto. Further, each wireless base station 12 may be connected to the higher station apparatus 30 via the wireless base station 11.

The radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like. Also, the radio base station 12 is a radio base station having local coverage, and is a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), transmission and reception It may be called a point or the like. Hereinafter, when the radio base stations 11 and 12 are not distinguished, they are collectively referred to as the radio base station 10.

Each user terminal 20 is a terminal compatible with various communication schemes such as LTE and LTE-A, and may include not only mobile communication terminals (mobile stations) but also fixed communication terminals (fixed stations).

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

OFDMA is a multicarrier transmission scheme in which a frequency band is divided into a plurality of narrow frequency bands (subcarriers) and data is mapped to each subcarrier to perform communication. SC-FDMA is a single carrier transmission scheme that divides the system bandwidth into bands consisting of one or continuous resource blocks for each terminal, and a plurality of terminals use different bands to reduce interference between the terminals. is there. The uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.

In the wireless communication system 1, as downlink channels, downlink shared channels (PDSCH: Physical Downlink Shared Channel) shared by each user terminal 20, broadcast channels (PBCH: Physical Broadcast Channel, NR-PBCH), downlink L1 / L2 A control channel or the like is used. User data, upper layer control information, at least one of SIB (System Information Block), etc. are transmitted by PDSCH. Also, a MIB (Master Information Block) is transmitted by the PBCH. A common control channel that reports the presence or absence of a paging channel is mapped to a downlink L1 / L2 control channel (for example, PDCCH), and data of a paging channel (PCH) is mapped to a PDSCH. A downlink reference signal, an uplink reference signal, and a physical downlink synchronization signal are separately arranged.

The downlink L1 / L2 control channel includes PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel) and the like. Downlink control information (DCI) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH. The number of OFDM symbols used for PDCCH is transmitted by PCFICH. Delivery confirmation information (for example, also referred to as retransmission control information, HARQ-ACK, or ACK / NACK) of HARQ (Hybrid Automatic Repeat reQuest) for the PUSCH is transmitted by the PHICH. The EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel), and is used for transmission such as DCI, similarly to the PDCCH.

In the radio communication system 1, as uplink channels, an uplink shared channel (PUSCH: Physical Uplink Shared Channel) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) or the like is used. User data and / or upper layer control information is transmitted by PUSCH. Also, downlink radio quality information (CQI: Channel Quality Indicator), delivery confirmation information, etc. are transmitted by the PUCCH. The PRACH transmits a random access preamble for establishing a connection with a cell.

In the radio communication system 1, as a downlink reference signal, a cell-specific reference signal (CRS), a channel state information reference signal (CSI-RS), and a demodulation reference signal (DMRS: DeModulation). Reference Signal), Positioning Reference Signal (PRS), etc. are transmitted. Further, in the wireless communication system 1, a measurement reference signal (SRS: Sounding Reference Signal), a demodulation reference signal (DMRS), and the like are transmitted as uplink reference signals. In addition, DMRS may be called a user terminal specific reference signal (UE-specific Reference Signal). Also, reference signals to be transmitted are not limited to these.

<Wireless base station>
FIG. 14 is a diagram showing an example of the entire 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. Note that each of the transmitting and receiving antenna 101, the amplifier unit 102, and the transmitting and receiving unit 103 may be configured to include one or more.

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

The baseband signal processing unit 104 performs packet data convergence protocol (PDCP) layer processing, user data division / combination, RLC layer transmission processing such as RLC (Radio Link Control) retransmission control, and MAC (Medium Access) for user data. Control) Transmission processing such as retransmission control (for example, HARQ transmission processing), scheduling, transmission format selection, channel coding, inverse fast Fourier transform (IFFT) processing, precoding processing, etc. It is transferred to 103. Also, with regard to the downlink control signal, transmission processing such as channel coding and / or inverse fast Fourier transform is performed and transferred to the transmission / reception unit 103.

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

Also, the transmission / reception unit 103 may use a downlink shared channel (for example, a PDSCH carrying an RMSI and / or a paging message), a control resource set (CORESET including a PDCSI scheduling a PDSCH carrying an RMSI and / or a paging message), and a synchronization signal block A predetermined signal (eg, WUS) using at least one of periodic radio resources (eg, WUS resources) time-multiplexed (TDM) or frequency-multiplexed (FDM) in at least one of (eg, SS blocks) ) May be sent.

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

The baseband signal processing unit 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, and error correction on user data included in the input upstream signal. Decoding, reception processing of MAC retransmission control, and reception processing of RLC layer and PDCP layer are performed, and are transferred to the higher station apparatus 30 via the transmission path interface 106. The call processing unit 105 performs at least one of setting of a communication channel, call processing such as releasing, status management of the wireless base station 10, and management of a wireless resource.

The transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Also, the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from the other wireless base station 10 via an inter-base station interface (for example, an optical fiber conforming to CPRI (Common Public Radio Interface), X2 interface). May be

FIG. 15 is a diagram showing an example of a functional configuration of a radio base station according to the present embodiment. In addition, in this example, the functional block of the characteristic part in this embodiment is mainly shown, and the wireless base station 10 also has another functional block required for wireless communication.

The baseband signal processing unit 104 at least includes a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Note that these configurations may be included in the wireless base station 10, and some or all of the configurations may not be included in the baseband signal processing unit 104. The baseband signal processing unit 104 has a digital beamforming function of providing digital beamforming.

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

For example, the control unit 301 generates a signal by the transmission signal generation unit 302 (including a signal corresponding to at least one of synchronization signal, RMSI, MIB, paging channel, system information, and broadcast channel (broadcast signal)), and a mapping unit Control at least one of allocation of signals by 303 and the like.

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

The transmission signal generation unit 302 generates a downlink signal (eg, at least one of a downlink control signal, a downlink data signal, a downlink reference signal, and an SS / PBCH block) based on an instruction from the control unit 301, and the mapping unit 303. Output to The transmission signal generation unit 302 can be configured from a signal generator, a signal generation circuit or a signal generation device described based on the common recognition in the technical field according to the present invention.

For example, based on an instruction from the control unit 301, the transmission signal generation unit 302 generates a DL assignment for notifying downlink signal allocation information and a UL grant for notifying uplink signal allocation information. Also, coding processing and modulation processing are performed on the downlink data signal according to a coding rate, a modulation method, 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 by transmission signal generation section 302 to a predetermined radio resource based on an instruction from control section 301, and outputs the mapped downlink signal to transmission / reception section 103. The mapping unit 303 may be configured of a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.

The reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 103. Here, the reception 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 from a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention.

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

The measurement unit 305 performs measurement on the received signal. The measuring unit 305 can be configured from a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.

The measurement unit 305 may, for example, receive power of a received signal (for example, reference signal received power (RSRP)), reception quality (for example, reference signal received quality (RSRQ), signal to interference plus noise ratio (SINR)) and / or Or, it may measure channel conditions and the like. The measurement result may be output to the control unit 301.

<User terminal>
FIG. 16 is a diagram showing an example of the entire configuration of the user terminal according to the present embodiment. The user terminal 20 includes a plurality of transmitting and receiving antennas 201, an amplifier unit 202, a transmitting and receiving unit 203, a baseband signal processing unit 204, and an application unit 205. Note that each of the transmitting and receiving antenna 201, the amplifier unit 202, and the transmitting and receiving unit 203 may be configured to include one or more.

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

The baseband signal processing unit 204 performs at least one of FFT processing, error correction decoding, reception processing of retransmission control, and the like on the input baseband signal. The downlink user data is transferred to the application unit 205. The application unit 205 performs processing on a layer higher than the physical layer and the MAC layer. Also, of the downlink data, broadcast information is also transferred 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. The baseband signal processing unit 204 performs transmission processing of retransmission control (for example, transmission processing of HARQ), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, etc. It is transferred to 203. The transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it. The radio frequency signal frequency-converted by the transmitting and receiving unit 203 is amplified by the amplifier unit 202 and transmitted from the transmitting and receiving antenna 201.

The transmitting and receiving unit 203 may further include an analog beam forming unit that performs analog beam forming. The analog beamforming unit comprises an analog beamforming circuit (eg, phase shifter, phase shift circuit) or an analog beamforming apparatus (eg, phase shifter) described based on common recognition in the technical field according to the present invention can do. Further, the transmitting and receiving antenna 201 can be configured by, for example, an array antenna.

In addition, the transmission / reception unit 203 may use a downlink shared channel (for example, a PDSCH carrying an RMSI and / or a paging message), a control resource set including a downlink control channel for scheduling the downlink shared channel (a PDSCH carrying an RMSI and / or a paging message). One of the periodic radio resources (eg, WUS resources) that are time multiplexed (TDM) or frequency multiplexed (FDM) in at least one of the synchronization signal block (eg, SS block) and the CORESET that includes the PDCCH to be scheduled One may be used to receive a predetermined signal (eg, WUS).

FIG. 17 is a diagram showing an example of a functional configuration of a user terminal according to the present embodiment. In addition, in this example, the functional block of the characteristic part in this embodiment is mainly shown, and it is assumed that the user terminal 20 also has other functional blocks necessary for wireless communication.

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

The control unit 401 controls the entire user terminal 20. The control unit 401 can be configured of a controller, a control circuit, or a control device described based on the common recognition in the technical field according to the present invention.

The control unit 401 controls, for example, signal generation by the transmission signal generation unit 402 and assignment of signals by the mapping unit 403. Further, the control unit 401 controls reception processing of the signal by the reception signal processing unit 404 and measurement of the signal by the measurement unit 405.

Further, the control unit 401 may control reception of a downlink control channel (for example, PDCCH) in response to reception of a predetermined signal (for example, WUS).

Also, the control resource set and the downlink shared channel may be frequency-multiplexed to the synchronization signal block, and the downlink shared channel may be time-multiplexed to the control resource set (for example, pattern 3).

Also, the control resource set may be time multiplexed to the synchronization signal block, and the downlink shared channel may be time multiplexed to the control resource set (eg, pattern 1).

Also, the time resource of the synchronization signal block is different from that of the synchronization signal block, the frequency resource of the synchronization signal block is different from the frequency resource of the synchronization signal block, and the downlink shared channel is frequency-multiplexed to the synchronization signal block. It may be time multiplexed into the resource set (pattern 2).

Also, radio resources (eg, WUS resources) may be frequency multiplexed into the control resource set (FIG. 4, FIG. 10B, FIG. 12A, FIG. 12C).

The transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal or the like) based on an instruction from the control unit 401, and outputs the uplink signal to the mapping unit 403. The transmission signal generation unit 402 can be configured from a signal generator, a signal generation circuit, or a signal generation device described based on the common recognition in the technical field according to the present invention.

The transmission signal generation unit 402 generates, for example, an uplink control signal related to delivery confirmation information and / or channel state information (CSI) based on an instruction from the control unit 401. Further, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, when the downlink control signal notified from the radio base station 10 includes a UL grant, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal.

Mapping section 403 maps the uplink signal generated by transmission signal generation section 402 to a radio resource based on an instruction from control section 401, and outputs the uplink signal to transmission / reception section 203. The mapping unit 403 may be configured of a mapper, a mapping circuit or a mapping device described based on the common recognition in the technical field according to the present invention.

The reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, and the like) on the reception signal input from the transmission / reception unit 203. Here, the reception signal is, for example, a downlink signal (a downlink control signal, a downlink data signal, a downlink reference signal, or the like) transmitted from the radio base station 10. The received signal processing unit 404 can be composed of a signal processor, a signal processing circuit or a signal processing device described based on the common recognition in the technical field according to the present invention. Also, the received signal processing unit 404 can constitute a receiving unit according to the present invention.

The received signal processing unit 404 receives a synchronization signal and a broadcast channel that the radio base station applies beamforming to transmit based on an instruction from the control unit 401. In particular, it receives synchronization signals and broadcast channels that are assigned to at least one of a plurality of time domains (e.g., symbols) that make up a predetermined transmission time interval (e.g., a subframe or slot).

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

The measurement unit 405 performs measurement on the received signal. For example, the measurement unit 405 may measure one or more serving cells and / or one or more neighboring cells using the SS / PBCH block transmitted from the radio base station 10. The measuring unit 405 can be configured of a measuring device, a measuring circuit or a measuring device described based on the common recognition in the technical field according to the present invention.

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

<Hardware configuration>
The block diagram used for the explanation of the above-mentioned embodiment has shown the block of a functional unit. These functional blocks (components) are realized by any combination of hardware and / or software. Moreover, the implementation method of each functional block is not particularly limited. That is, each functional block may be realized using one physically and / or logically coupled device, or directly and / or two or more physically and / or logically separated devices. Or it may connect indirectly (for example, using a wire communication and / or radio), and it may be realized using a plurality of these devices.

For example, a wireless base station, a user terminal, and the like in an embodiment of the present invention may function as a computer that performs the processing of the wireless 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 above-described wireless base station 10 and user terminal 20 may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007 and the like. Good.

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

For example, although only one processor 1001 is illustrated, there may be a plurality of processors. Also, the processing may be performed by one processor, or the processing may be performed by one or more processors simultaneously, sequentially or using other techniques. The processor 1001 may be implemented by one or more chips.

Each function in the radio base station 10 and the user terminal 20 is calculated by causing the processor 1001 to read predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and the communication device 1004 is performed. This is realized by controlling communication, and controlling reading and / or writing of data in the memory 1002 and the storage 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be configured by a central processing unit (CPU) including an interface with a peripheral device, a control device, an arithmetic device, a register, and the like. For example, the above-described baseband signal processing unit 104 (204), call processing unit 105, and the like may be realized by the processor 1001.

Also, the processor 1001 reads a program (program code), a software module, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processing according to these. As a program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used. For example, the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operating in the processor 1001, or may be realized similarly for other functional blocks.

The memory 1002 is a computer readable recording medium, and for example, at least at least a read only memory (ROM), an erasable programmable ROM (EPROM), an electrically EPROM (EEPROM), a random access memory (RAM), or any other suitable storage medium. It may be configured by one. The memory 1002 may be called a register, a cache, a main memory (main storage device) or the like. The memory 1002 may store a program (program code), a software module, and the like that can be executed to implement the wireless communication method according to an embodiment of the present invention.

The storage 1003 is a computer readable recording medium, and for example, a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM), etc.), a digital versatile disk, Blu-ray® disc), removable disc, hard disc drive, smart card, flash memory device (eg card, stick, key drive), magnetic stripe, database, server, at least one other suitable storage medium May be configured by The storage 1003 may be called an auxiliary storage device.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also called, for example, a network device, a network controller, a network card, a communication module, or the like. The communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, and the like to realize, for example, frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured. 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 realized by the communication device 1004.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, and the like) that receives an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, a light emitting diode (LED) lamp, and 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).

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

Also, the radio base station 10 and the user terminal 20 may be microprocessors, digital signal processors (DSPs), application specific integrated circuits (ASICs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), etc. Hardware may be included, and part or all of each functional block may be realized using the hardware. For example, processor 1001 may be implemented using at least one of these hardware.

(Modification)
The terms described in the present specification and / or the terms necessary for the understanding of the present specification may be replaced with terms having the same or similar meanings. For example, the channels and / or symbols may be signaling. Also, the signal may be a message. The reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot (Pilot), a pilot signal or the like according to an applied standard. Also, a component carrier (CC: Component Carrier) may be called a cell, a frequency carrier, a carrier frequency or the like.

Also, the radio frame may be configured by one or more periods (frames) in the time domain. Each of the one or more periods (frames) that constitute a radio frame may be referred to as a subframe. Furthermore, a subframe may be configured by one or more slots in the time domain. The subframes may be of a fixed time length (e.g., 1 ms) independent of the neurology.

Furthermore, the slot may be configured by one or more symbols in the time domain (such as orthogonal frequency division multiplexing (OFDM) symbols, single carrier frequency division multiple access (SC-FDMA) symbols, etc.). Also, the slot may be a time unit based on the neurology. Also, the slot may include a plurality of minislots. Each minislot may be configured by one or more symbols in the time domain. Minislots may also be referred to as subslots.

A radio frame, a subframe, a slot, a minislot and a symbol all represent time units when transmitting a signal. For radio frames, subframes, slots, minislots and symbols, other names corresponding to each may be used. For example, one subframe may be referred to as a transmission time interval (TTI), a plurality of consecutive subframes may be referred to as a TTI, and one slot or one minislot may be referred to as a TTI. May be That is, the subframe and / or 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. It may be. The unit representing TTI may be called a slot, a minislot, etc. instead of a subframe.

Here, TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the radio base station performs scheduling to assign radio resources (frequency bandwidth usable in each user terminal, transmission power, etc.) to each user terminal in TTI units. Note that the definition of TTI is not limited to this.

The TTI may be a transmission time unit of a channel encoded data packet (transport block), a code block, and / or a codeword, or may be a processing unit such as scheduling and link adaptation. Note that, when a TTI is given, the time interval (eg, the number of symbols) in which the transport block, the code block, and / or the codeword is actually mapped may be shorter than the TTI.

If one slot or one minislot is referred to as TTI, one or more TTIs (ie, one or more slots or one or more minislots) may be the minimum time unit of scheduling. In addition, the number of slots (the number of minislots) constituting the minimum time unit of the scheduling may be controlled.

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

Note that a long TTI (for example, a normal TTI, a subframe, etc.) may be replaced with a TTI having a time length exceeding 1 ms, and a short TTI (eg, a shortened TTI, etc.) is less than the TTI length of long TTI and 1 ms It may replace with TTI which has the above TTI length.

A resource block (RB: Resource Block) is a resource allocation unit in time domain and frequency domain, and may include one or more consecutive subcarriers (subcarriers) in the frequency domain. Also, an RB may include one or more symbols in the time domain, and may be one slot, one minislot, one subframe, or one TTI in length. One TTI and one subframe may be respectively configured by one or more resource blocks. Note that one or more RBs may be a physical resource block (PRB: Physical RB), a subcarrier group (SCG: Sub-Carrier Group), a resource element group (REG: Resource Element Group), a PRB pair, an RB pair, etc. It may be called.

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

The above-described structures such as the radio frame, subframe, slot, minislot and symbol are merely examples. For example, the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, included in an RB The number of subcarriers, as well as the number of symbols in a TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be variously changed.

Also, the information, parameters, etc. described in the present specification may be expressed using absolute values, may be expressed using relative values from predetermined values, or other corresponding information. May be represented. For example, radio resources may be indicated by a predetermined index.

The names used for parameters and the like in the present specification are not limited names in any respect. For example, since various channels (PUCCH (Physical Uplink Control Channel), PDCCH (Physical Downlink Control Channel), etc.) and information elements can be identified by any suitable names, various assignments are made to these various channels and information elements. The name is not limited in any way.

The information, signals, etc. described herein may be represented using any of a variety of different techniques. For example, data, instructions, commands, information, signals, bits, symbols, chips etc that may be mentioned throughout the above description may be voltage, current, electromagnetic waves, magnetic fields or particles, optical fields or photons, or any of these May be represented by a combination of

Also, information, signals, etc. may be output from the upper layer to the lower layer and / or from the lower layer to the upper layer. Information, signals, etc. may be input / output via a plurality of network nodes.

The input / output information, signals and the like may be stored in a specific place (for example, a memory) or may be managed using a management table. Information, signals, etc. input and output can be overwritten, updated or added. The output information, signals and the like may be deleted. The input information, signals and the like may be transmitted to other devices.

The notification of information is not limited to the aspects / embodiments described herein, and may be performed using other methods. For example, notification of information may be physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling, It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling, other signals, or a combination thereof.

The physical layer signaling may be called L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like. Also, RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like. Also, MAC signaling may be notified using, for example, a MAC control element (MAC CE (Control Element)).

In addition, notification of predetermined information (for example, notification of "being X") is not limited to explicit notification, but implicitly (for example, by not notifying the predetermined information or other information Notification may be performed).

The determination may be performed by a value (0 or 1) represented by one bit, or may be performed by a boolean value represented by true or false. , Numerical comparison (for example, comparison with a predetermined value) may be performed.

Software may be called software, firmware, middleware, microcode, hardware description language, or any other name, and may be instructions, instruction sets, codes, code segments, program codes, programs, subprograms, software modules. Should be interpreted broadly to mean applications, software applications, software packages, routines, subroutines, objects, executables, threads of execution, procedures, functions, etc.

Also, software, instructions, information, etc. may be sent and received via a transmission medium. For example, software may use a wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or a wireless technology (infrared, microwave, etc.), a website, a server These or other wired and / or wireless technologies are included within the definition of the transmission medium, as transmitted from a remote source, or other remote source.

The terms "system" and "network" as used herein may be used interchangeably.

As used herein, “base station (BS: Base Station)”, “radio base station”, “eNB”, “gNB”, “cell”, “sector”, “cell group”, “carrier” and “component” The term "carrier" may be used interchangeably. A base station may be called in terms of a fixed station (Node station), NodeB, eNodeB (eNB), access point (access point), transmission point, reception point, transmission / reception point, femtocell, small cell, and the like.

A base station may accommodate one or more (e.g., three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, a small base station for indoor use (RRH: Communication service can also be provided by Remote Radio Head). The terms "cell" or "sector" refer to part or all of the coverage area of a base station and / or a base station subsystem serving communication services in this coverage.

As used herein, the terms "mobile station (MS)," user terminal "," user equipment (UE) "and" terminal "may be used interchangeably. .

The mobile station is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless terminal, remote terminal , Handset, user agent, mobile client, client or some other suitable term.

The base station and / or the mobile station may be called a transmitting device, a receiving device, etc.

Also, the radio base station in the present specification may be replaced with a user terminal. For example, each aspect / embodiment of the present invention may be applied to a configuration in which communication between a wireless base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device). In this case, the user terminal 20 may have a function that the above-described radio base station 10 has. Moreover, the wordings such as "up" and "down" may be read as "side". For example, the upstream channel may be read as a side channel.

Similarly, a user terminal herein may be read at a radio base station. In this case, the radio base station 10 may have a function that the above-described user terminal 20 has.

In the present specification, the operation supposed to be performed by the base station may be performed by its upper node in some cases. In a network including one or more network nodes having a base station, various operations performed for communication with a terminal may be a base station, one or more network nodes other than the base station (eg, It is apparent that this can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc. but not limited thereto or a combination thereof.

Each aspect / embodiment described in this specification may be used alone, may be used in combination, and may be switched and used along with execution. Moreover, as long as there is no contradiction, you may replace the order of the processing procedure of each aspect / embodiment, sequence, flowchart, etc. which were demonstrated in this specification. For example, for the methods described herein, elements of the various steps are presented in an exemplary order and are not limited to the particular order presented.

Each aspect / embodiment described in the present specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile) Communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (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) And / or systems based on other suitable wireless communication methods and / or extended next generation systems based on these.

The phrase "based on", as used herein, does not mean "based only on," unless expressly stated otherwise. In other words, the phrase "based on" means both "based only on" and "based at least on."

Any reference to an element using the designation "first", "second" and the like as used herein does not generally limit the quantity or order of those elements. These designations may be used herein as a convenient way of distinguishing between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be taken or that the first element must somehow precede the second element.

The term "determining" as used herein may encompass a wide variety of operations. For example, “determination” may be calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data) A search on structure), ascertaining, etc. may be considered as "determining". Also, "determination" may be receiving (e.g. receiving information), transmitting (e.g. transmitting information), input (input), output (output), access (access) It may be considered as "determining" (eg, accessing data in memory) and the like. Also, “determination” is considered to be “determination” to resolve, select, choose, choose, establish, compare, etc. It is also good. That is, "determination" may be considered as "determining" some action.

As used herein, the terms "connected", "coupled", or any variation thereof, refers to any direct or indirect connection between two or more elements or It means a bond and can include the presence of one or more intermediate elements between two elements "connected" or "connected" to each other. The coupling or connection between elements may be physical, logical or a combination thereof. For example, "connection" may be read as "access".

As used herein, when two elements are connected, using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-exclusive examples, the radio frequency domain It can be considered as "connected" or "coupled" with one another using electromagnetic energy or the like having wavelengths in the microwave region and / or the light (both visible and invisible) regions.

As used herein, the term "A and B are different" may mean "A and B are different from each other". The terms "leave", "combined" and the like may be interpreted similarly.

As used herein and in the appended claims, when "including", "comprising", and variations thereof are used, these terms as well as the term "comprising" are inclusive. Intended to be Further, it is intended that the term "or" as used herein or in the claims is not an exclusive OR.

Although the present invention has been described above in detail, it is obvious for those skilled in the art that the present invention is not limited to the embodiments described herein. The present invention can be implemented as modifications and changes without departing from the spirit and scope of the present invention defined based on the description of the claims. Therefore, the description in the present specification is for the purpose of illustration and does not provide any limiting meaning to the present invention.

Claims

Using one of periodic radio resources time-multiplexed or frequency-multiplexed in at least one of a downlink shared channel, a control resource set including a downlink control channel for scheduling the downlink shared channel, and a synchronization signal block A receiver for receiving a signal;
A control unit configured to control reception of the downlink control channel according to reception of the predetermined signal.
The user terminal according to claim 1, wherein the control resource set and the downlink shared channel are frequency-multiplexed to the synchronization signal block, and the downlink shared channel is time-multiplexed to the control resource set.
The user terminal according to claim 1, wherein the control resource set is time-multiplexed with the synchronization signal block, and the downlink shared channel is time-multiplexed with the control resource set.
The time resource of the synchronization signal block is different from the time resource of the synchronization signal block,
The frequency resource of the synchronization signal block is different from the frequency resource of the synchronization signal block,
The user terminal according to claim 1, wherein the downlink shared channel is frequency-multiplexed to the synchronization signal block and time-multiplexed to the control resource set.
The user terminal according to any one of claims 1 to 4, wherein the radio resource is frequency-multiplexed to the control resource set.
Using one of periodic radio resources time-multiplexed or frequency-multiplexed in at least one of a downlink shared channel, a control resource set including a downlink control channel for scheduling the downlink shared channel, and a synchronization signal block Receiving the signal;
And d. Controlling reception of the downlink control channel in response to reception of the predetermined signal.