RU2780812C1 - Terminal, method for radio communication, base station and system - Google Patents

Abstract

FIELD: wireless communication.

SUBSTANCE: invention relates to a user terminal and to a method for radio communication in a new generation mobile communication system. User terminal comprises: a reception section configured to receive the descending control channel; and a control section configured to control the tracking of the descending control channel using the frequency and offset of the initial time, associated with the subcarrier spacing.

EFFECT: ensured control of the tracking of the descending control channel when using multiple numberings.

5 cl, 24 dwg

Description

The field of technology to which the invention belongs

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

State of the art

In order to improve data rates and reduce delay in UMTS (Universal Mobile Telecommunications System) networks, an LTE (Long Term Evolution) scheme has been developed (Non-Patent Literature 1). In addition, in order to increase the capacity and complexity of the LTE scheme (version 8 and version 9 of the LTE scheme), an LTE-A scheme (LTE-Advanced or "Advanced LTE scheme" and versions 10, 11, 12 and 13 of the LTE scheme) has been prepared. .

In addition, legacy LTE systems (also referred to as, for example, FRA (future radio access), 5th generation mobile communication system (5G), 5G+ (plus), NR (New Radio technology, New Radio technology) are being studied, NX (New Radio Access technology), FX (Future Generation Radio Access technology) or versions 14, 15 of the LTE scheme or later).

The base station controls the allocation (scheduling) of data to the user terminal (UE: User Equipment; user equipment). The base station sends downlink control information (DCI) to the UE, indicating the data scheduling instruction, using a downlink control channel (eg, PDCCH (Physical Downlink Control Channel; physical downlink control channel)).

List of Cited Materials

Patent Literature

Non-Patent Literature 1: 3GPP TS 36.300 V8.12.0 "Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); overall description; Stage 2 (Release 8)”, April 2010” (“Enhanced Universal Terrestrial Access (E-UTRA) and Enhanced Universal Terrestrial Access Network (E-UTRAN); general description; Stage 2 (version 8), April 2010.”).

Disclosure of the essence of the invention

Technical problem

The use of multiple numerologies (eg subcarrier spacings (SCS)) in future radio communication systems (eg NR) is being studied.

The possibility of using a conventional PDCCH and a group common (GC, from the English. Group Common) PDCCH is also being studied. However, the issue of how to track (monitor) these PDCCHs is not yet well understood.

Obviously, until a method is developed to properly control PDCCH tracking (monitoring), throughput will decrease.

Thus, one of the objectives of the present invention is to provide a user terminal and a radio communication method that will allow proper control of downlink control channel tracking even when multiple numerologies are used.

Solution

A user terminal according to one aspect of the present invention comprises: a receiving section configured to receive a downlink control channel; and a control section configured to control tracking of the downlink control channel using the periodicity and the start time offset associated with the subcarrier spacing.

Positive results of the invention

According to one aspect of the present invention, downlink control channel tracking can be properly managed even when multiple numerologies are used.

Brief description of the drawings

In FIG. 1 is a diagram illustrating one example of tracking events.

In FIG. 2 is a diagram illustrating one example of a relationship between SCS, tracking periodicity, and tracking offset.

In FIG. 3 is a diagram illustrating one example of tracking using tracking periodicity and slot offset.

In FIG. 4 is a diagram illustrating one example of tracking using tracking periodicity, slot offset, and symbol offset.

In FIG. 5 is a diagram illustrating one example of tracking using tracking periodicity, slot offset, symbol offset, and duration.

In FIG. 6 is a diagram illustrating one example of a set of parameters.

In FIG. 7A and 7B are diagrams, respectively, illustrating one example of GC-PDCCH parameter sets for 15 kHz and 30 kHz in SCS.

In FIG. 8A and 8B are diagrams, respectively, illustrating one example of GC-PDCCH parameter sets for 60 kHz and 120 kHz in SCS.

In FIG. 9 is a diagram illustrating one example of a GC-PDCCH parameter set.

In FIG. 10 is a diagram illustrating another example of a GC-PDCCH parameter set.

In FIG. 11A and 11B are diagrams respectively illustrating one example of common parameter sets for 15 kHz and 30 kHz in SCS.

In FIG. 12A and 12B are diagrams respectively illustrating one example of common parameter sets for 60 kHz and 120 kHz in SCS.

In FIG. 13 is a diagram illustrating one example of a common set of parameters.

In FIG. 14 is a diagram illustrating another example of a common set of parameters.

In FIG. 15 is a diagram illustrating one example of a schematic configuration of a radio communication system according to one embodiment.

In FIG. 16 is a diagram illustrating one example of a generalized configuration of a radio base station according to one embodiment.

In FIG. 17 is a diagram illustrating one example of a functional configuration of a radio base station according to one embodiment.

In FIG. 18 is a diagram illustrating one example of a generalized configuration of a user terminal according to one embodiment.

In FIG. 19 is a diagram illustrating one example of a functional configuration of a user terminal according to one embodiment.

In FIG. 20 is a diagram illustrating one example of the hardware configurations of a radio base station and a user terminal according to one embodiment.

Implementation of the invention

The use of a downlink control channel to transmit downlink control information (DCI) in future radio communication systems (i.e., for example, at least one of the following systems: NR, 5G and 5G+, which will be referred to simply as NR hereinafter) is being studied.

The UE monitors (this process may be referred to as "blind decoding") one or a plurality of Control Resource Sets (CORESET) configured for the terminal itself and detects downstream control information.

A DCI for scheduling the reception of downlink (DL) data (for example, a downlink shared channel (PDSCH: Physical Downlink Shared Channel) and/or measurement of a downlink reference signal may be referred to as a downlink assignment, downlink grant, or descending DCI. A DCI for scheduling the transmission of uplink (UL, from Uplink) data (for example, an uplink shared channel (PUSCH: Physical Uplink Shared Channel; physical uplink shared channel)) and / or measurement of an uplink sounding (measurement) signal may be referred to as an uplink grant or ascending DCI.

According to NR, a PDCCH (which may be referred to as a UE-specific PDCCH or a normal PDCCH) for one UE, and furthermore a PDCCH (which may be referred to as a PDCCH-Group-Group (GC-PDCCH) or a UE-Group-PDCCH) which is shared by one or more UEs are considered as downlink control channels.

The "Normal PDCCH" may be a PDCCH for transmitting DCI scheduling PDSCH and/or PUSCH. "Normal PDCCH" may characterize a PDCCH for DCI transmission to trigger measurement and report on Aperiodic Sounding Reference Signal (A-SRS) and/or Aperiodic Channel State Information (A-CSI). Aperiodic Channel State Information). "Normal PDCCH" may characterize a PDCCH for transmitting DCI to control (activate or cancel) semi-persistent scheduling (SPS, Semi-Persistent Scheduling), transmission without an uplink grant, and/or semi-persistent CSI (SP-CSI).

The DCI transmitted on the GC-PDCCH may be referred to as common to the DCI group.

Below, the representation of "PDCCH" can be interpreted as "GC-PDCCH and/or normal PDCCH".

The question of setting the tracking periodicity (tracking period or periodicity) of the GC-PDCCH depending on the subcarrier spacing (SCS, from the English Subcarrier Spacing) is being studied. For example, 1, 2, 5, 10, and 20 slots are provided for 15 kHz SCS (15 kHz based slot), 1, 2, 4, 5, 10, and 20 slots are provided for 30 kHz SCS (15 kHz based slot). 30 kHz), 1, 2, 4, 5, 8, 10 and 20 slots are provided for SCS at 60 kHz (slot based on 60 kHz), and 1, 2, 4, 5, 10 and 20 slots are provided for SCS at 120 kHz (slot based on 120 kHz).

The tracking frequency may be configured for the UE by a higher layer. In the following description, the higher layer signaling may be, for example, one of the following types of signaling: Radio Resource Control (RRC) signaling, Medium Access Control (MAC) signaling ( for example, a MAC control element (MAC CE) or a protocol data unit (PDU, from the English Protocol Data Unit) MAC)) or broadcast information (a block of basic information (MIB, from the English Master Information Block) or a system information block (SIB, from English System Information Block)), or a combination of them. In addition, the physical layer signaling may, for example, be a DCI.

Moreover, the following tracking methods 1 and 2 for PDCCH tracking are being studied.

Tracking method 1: The tracking frequency is equal to or greater than 14 characters.

The following tracking methods 1-1 and 1-2 are considered for tracking method 1.

Tracking method 1-1: PDCCH tracking is performed in 3 or less OFDM (Orthogonal Frequency Division Multiplexing) symbols at the start of a slot.

Tracking method 1-2: PDCCH tracking is performed on an arbitrary range of 3 or less contiguous OFDM symbols in a slot. For a particular UE, all search space configurations may be arranged in the same range of 3 or less contiguous OFDM symbols in a slot.

Tracking method 2: The PDCCH tracking period is less than 14 symbols.

PDCCH tracking may be performed in 3 or less OFDM symbols at the start of a slot.

In addition, dynamic direction control (namely uplink or downlink) per symbol is also being studied for NR. For example, it has been learned to define one or more slot formats with information (also referred to as Slot Format related Information (SFI)), which is related to the slot format.

The slot format may indicate at least one of the following parameters: the direction of transmission for a given period of time (for example, a given number of characters) in the slot, a guard period (GP, from English Guard Period) and an unknown resource (which may be referred to as a reserved resource ). The SFI may contain information related to the number of slots to which the slot format is applied.

The issue of dynamic notification of user equipment (UE) about SFI using GC-PDCCH is being studied. The GC-PDCCH may be referred to as SFI-PDCCH or DCI format 2_0.

The issue of configuring 2 or less decoding candidates having a configured aggregation level in a common search space (CSS) or in a group common search space (group CSS) in a configured CORESET for blind decoding (blind detection) GC- PDCCH that transmits SFI.

Configuring the snooping frequency for the GC-PDCCH alone will not allow a strict snooping event to be defined. A watch event may be referred to as a watch window.

When, for example, the GC-PDCCH tracking period is configured for 5 slots as shown in FIG. 1, tracking events #0 to #4 occur with different start times in the slot unit. Thus, it is expedient to configure not only the tracking frequency, but also the tracking start time.

Obviously, until a method is developed for properly configuring PDCCH snooping events, implementation complexity will increase, power consumption will increase, and throughput will also decrease.

Thus, the present inventors have developed a method for properly configuring PDCCH tracking events.

Next, with reference to the accompanying drawings, one embodiment of the present invention will be described in detail. The radio communication method according to each embodiment of the present invention may each be applied alone or may be applied in combination.

A parameter indicating a tracking configuration (tracking event) may be configured for the UE. The tracking event contains at least a tracking frequency. The UE may determine the tracking temporary resource according to the tracking configuration. A parameter indicating a CORESET configuration may be configured for the UE. The UE may be configured with a parameter indicating one or more configurations of partial bands (parts of the bandwidth or BWP (Bandwidth Part)) per component carrier (CC). The UE may determine the tracking frequency resource based on the CORESET configuration and/or the BWP configuration.

An SCS may be configured for the UE (eg, SCS for CORESET). Parameter notification for determining the SCS may be sent to the UE through higher layer signaling, or may be implicitly sent to the UE through other parameters.

Aspect 1

According to aspect 1, an additional parameter is introduced for PDCCH snooping (snooping configuration).

Aspect 1 may be applied to track a normal PDCCH, or may be applied to track a GC-PDCCH. The parameter for tracking the normal PDCCH may be the same or different from the parameter for tracking the GC-PDCCH.

In addition, for the CORESET in which the PDCCH resides, the following cases 1 and 2 are allowed.

Case 1: CORESET starts at the first character in the slot.

In this case, cases 1-1 and 1-2 are allowed.

Case 1-1: CORESET is more than one OFDM symbol.

Case 1-2: CORESET is 3 or less OFDM symbols.

Case 2: CORESET starts with one of the characters in the slot.

In this case, the following cases 2-1 and 2-2 are allowed.

Case 2-1: CORESET is more than one OFDM symbol.

Case 2-2: CORESET is more than 3 or less OFDM symbols.

At least one of the following aspects 1-1, 1-2 and 1-3 can be applied to realize at least one of the above cases.

Aspect 1-1

In order to define a PDCCH strict snooping event (snooping configuration) at a specific frequency, a tracking offset (slot offset or snooping slot offset) is introduced in the slot slot unit (slot layer). The slot offset value can range from slot 0 to (tracking cycle - 1) slots.

The PDCCH tracking offset may be SCS dependent. As shown in the table in FIG. 2, tracking cycles and slot offsets may be provided for different SCSs.

A parameter may be configured for the UE to determine the tracking frequency. For example, a parameter (eg, a candidate index) indicating one of a plurality of tracking cycle candidates associated with the SCS in the table may be reported by higher layer signaling, or a parameter related to the tracking cycle may be notified. The UE may determine the tracking period based on the parameter for determining the tracking period.

A parameter may be configured for the UE to determine the slot offset. For example, a parameter (eg, candidate index) indicative of one of a plurality of slot offset candidates associated with the tracking frequency in the table may be signaled by higher layer signaling, or a parameter associated with slot offset may be notified. The UE determines the slot offset based on the parameter for determining the slot offset.

When the tracking period is configured to 5 slots and the slot offset is configured to 2 slots, as shown in FIG. 3, the UE may recognize that slots #2 and #7 refer to tracking events.

According to this aspect 1-1, the UE may set a slot to perform tracking with a tracking period.

Aspect 1-2

To define a snooping event (snooping configuration), a snooping offset (symbol offset or snooping symbol offset) in symbol unit (symbol level) in the slot for which PDCCH snooping has been configured (eg, slot offset) is entered. The UE may determine the starting tracking symbol based on the symbol offset. When 1 slot consists of 14 OFDM symbols, the symbol offset value range (start symbol) can be 0 symbol to 13 symbols.

A parameter may be signaled to the UE to determine the symbol offset. By higher layer signaling, a parameter (eg, symbol offset or candidate index) indicative of one of the plurality of symbol offset candidates may be reported, or a parameter related to the symbol offset may be reported. The UE determines the symbol offset based on the parameter for determining the symbol offset.

In addition to aspect 1-1, aspect 1-2 can be applied.

When the tracking period is configured to 5 symbols, the slot offset is configured to 2 slots, and the symbol offset is configured to 3 symbols, as shown in FIG. 4, the UE recognizes that the tracking event start time is symbol #3 in each slot #2 and #7.

According to this aspect 1-2, the UE may set a starting tracking symbol with a tracking period.

Aspect 1-3

To define a tracking event (tracking configuration), the tracking duration is entered. The tracking duration value can range from 1 character to 3 characters.

The UE may determine the CORESET duration based on the tracking duration. The CORESET duration may be equal to the tracking duration, or may be different from the tracking duration.

In addition, the CORESET duration may be configurable for the UE. The CORESET configuration information including the CORESET duration may be configured for the UE. The UE may determine the tracking duration based on the CORESET duration.

In addition to aspect 1-1, aspect 1-3 can be applied. Aspect 1-3 can be applied in place of aspects 1-1 and 1-2.

When the tracking period is configured to 5 symbols, the slot offset is configured to 2 slots, the symbol offset is configured to 3 symbols, and the tracking duration is configured to 3 symbols, as shown in FIG. 5, the UE recognizes that the tracking event refers to symbols #3 to #5 in each of slots #2 and #7.

According to this aspect 1-3, the UE may set a tracking event or a CORESET duration.

Aspects 1-1, 1-2, and 1-3 disclosed above can be applied to a regular PDCCH snooping event and/or a GC-PDCCH snooping event.

At least one of the slot offset, symbol offset, and tracking duration may be dependent on the SCS in at least one of the normal PDCCH and the GC-PDCCH.

The required parameter may differ depending on which of the cases 1-1, 1-2, 2-1 is used.

When using, for example, aspect 1-1, you can implement the case 1-1.

By using aspects 1-1 and 1-3, for example, case 1-2 can be realized.

By using aspects 1-1 and 1-2, for example, case 2-1 can be realized.

When using aspects 1-1, 1-2 and 1-3, for example, case 2-2 can be realized.

The slot offset and/or symbol offset may be referred to as tracking offset.

Aspect 2

Prerequisites 1 and 2 regarding the relationship between the SCS and the tracking event (tracking configuration) of the PDCCH are allowed.

Prerequisite 1: In order to define slot tracking events for the normal PDCCH and GC-PDCCH, the tracking periodicity and tracking offset are configured, which are dependent on the SCS.

Premise 2: Tracking periodicity and tracking offset are independent of SCS in case of normal PDCCH, and tracking periodicity and tracking offset are dependent on SCS in case of GC-PDCCH.

It is important how to configure tracking periods and tracking offsets for the regular PDCCH and GC-PDCCH in each of prerequisites 1 and 2.

One of the following options 1 and 2 can be used.

Option 1

The normal PDCCH snooping parameter and the GC-PDCCH snooping parameter can be configured independently of each other. In particular, one of the following options 1-1 and 1-2 can be applied.

Option 1-1

The normal PDCCH snooping parameter and the GC-PDCCH snooping parameter can be configured for the UE through higher layer signaling.

The normal PDCCH tracking cycle in the slot unit may be signaled to the UE by a higher layer parameter (eg, PDCCH tracking cycle slot).

The normal PDCCH tracking offset in the slot unit may be signaled to the UE via a higher layer parameter (eg, PDCCH tracking offset slot).

The GC-PDCCH tracking frequency in the slot unit may be signaled to the UE by a higher layer parameter (eg, SFI tracking frequency).

The GC-PDCCH tracking offset in the slot unit may be signaled to the UE via a higher layer parameter (eg, SFI tracking offset).

The symbol offset for the normal PDCCH may be notified to the UE by a higher layer parameter, or the parameter offset for the GC-PDCCH may be notified to the UE by a higher layer parameter. The tracking duration for the normal PDCCH may be signaled to the UE via a higher layer parameter. The tracking duration for the GC-PDCCH may be signaled to the UE via a higher layer parameter.

Option 1-2

A set of parameters (parameter configuration) for tracking may be configured (or set) in advance for the normal PDCCH and/or GC-PDCCH. The parameter set may be configured by higher level signaling, or may be specified in the specification.

As shown in FIG. 6, a table including a plurality of parameter sets (input data) may be used. Each parameter set contains a PDCCH tracking configuration index I _M (or range thereof), a tracking frequency N _monitoring [slots], and a slot offset T _offset [slots]. Part of the parameter sets can be reserved. The slot offset can be expressed by an equation that uses I _M .

Each input may include a symbol offset and/or a tracking duration.

A single common table may be used for the normal PDCCH and GC-PDCCH, or a separate table for the normal PDCCH and a separate table for the GC-PDCCH can be used.

The UE may be configured with a PDCCH tracking configuration index (regular PDCCH tracking configuration index) for a normal PDCCH. The normal PDCCH tracking configuration index may be configured by higher layer signaling. The UE determines the parameter set associated with the normal PDCCH tracking configuration index from the table.

The UE may be configured with a PDCCH Tracking Configuration Index (GC-PDCCH Tracking Configuration Index) for the GC-PDCCH. The GC-PDCCH tracking configuration index may be configured by higher layer signaling. The UE determines the parameter set associated with the GC-PDCCH tracking configuration index from the table.

One of the following options 1-2-1 and 1-2-2 may be applied to the GC-PDCCH.

Option 1-2-1

The GC-PDCCH tracking configuration index may be separately set for each SCS parameter set.

In FIG. 7A shows the GC-PDCCH parameter set table for SCS=15 kHz. In FIG. 7B shows the GC-PDCCH parameter set table for SCS=30 kHz. In FIG. 8A shows the GC-PDCCH parameter set table for SCS=60 kHz. In FIG. 8B shows the GC-PDCCH parameter set table for SCS=120 kHz.

Each table contains many sets of parameters (input data). Each parameter set contains a GC-PDCCH tracking configuration index I _GC-M (or range thereof), a tracking frequency N _monitoring [slots], and a slot offset T _offset [slots]. Part of the parameter sets can be reserved. The slot offset can be expressed through an equation that uses I _GC-M . I _GC-M can be expressed as I _SFI-M .

The UE determines a table which is referred to based on the SCS configured for CORESET referred to in GC-PDCCH snooping, or the SCS configured for partial bandwidth (BWP: Part Bandwidth) for which CORESET is configured referred to in GC-PDCCH snooping, and defines a set of parameters based on the GC-PDCCH tracking configuration index. In other words, the UE reads another table based on the SCS configured for CORESET referred to in GC-PDCCH snooping, or the SCS configured for partial bandwidth (BWP: Partial Bandwidth) for which CORESET is configured referred to in GC-PDCCH snooping. .

Option 1-2-2

A tracking configuration index of the GC-PDCCH may be given to a parameter set obtained by the communication parameter sets for all SCSs.

As shown in FIG. 9, a table containing a plurality of parameter sets (input data) may be used. Each parameter set contains the GC-PDCH tracking configuration index I _GC-M (or its range), SCS [kHz], tracking frequency N _monitoring [slots], and slot offset T _offset [slots]. Part of the parameter sets can be reserved. The slot offset can be expressed through an equation that uses I _GC-M .

In FIG. 9, GC-PDCCH tracking configuration indexes are defined for parameter sets stored in ascending order of tracking cycles. Instead of the table in Fig. 9, the table shown in FIG. 10. Although the information contained in FIG. 10 is similar to the information shown in FIG. 9, GC-PDCCH tracking configuration indexes are defined for parameter sets stored in ascending SCS order.

According to Option 1-2 mentioned above, the UE can determine the tracking frequency and slot offset based on the single parameter notification and, as a result, reduce the notification overhead compared to Option 1-1.

Option 2

The normal PDCCH tracking parameter and the GC-PDCCH tracking parameter may be shared. In particular, one of the following options 2-1 or 2-2 can be used.

Option 2-1

Each of the plurality of parameters for PDCCH tracking may be separately configured for the UE through higher layer signaling.

The PDCCH tracking periodicity in the slot unit may be signaled to the UE by a higher layer parameter (eg, PDCCH tracking periodicity slot). This PDCCH tracking periodicity can be applied to both the normal PDCCH and the GC-PDCCH.

The PDCCH tracking offset in the slot unit may be signaled to the UE via a higher layer parameter (eg, a PDCCH tracking offset slot). This PDCCH tracking offset can be applied to both the regular PDCCH and the GC-PDCCH.

According to Option 1-2 mentioned above, the UE can determine the parameters for both the normal PDCCH and the GC-PDCCH based on a single parameter notification, and therefore can reduce the notification overhead compared to Option 1-1.

Option 2-2

To track the normal PDCCH and GC-PDCCH, a common set of parameters (parameter configuration) can be configured (or set) in advance. The parameter set may be configured by higher level signaling, or may be specified in the specification. The parameter set that is common between the normal PDCCH and the GC-PDCCH may hereinafter be referred to as the common parameter set.

The PDCCH tracking configuration indices for the normal PDCCH and/or GC-PDCCH may be configured for the UE. The PDCCH tracking configuration indexes may be signaled by higher layer signaling. The UE defines parameter sets associated with configured PDCCH tracking configuration indexes.

One of the following options 2-2-1 and 2-2-2 may be applied to the GC-PDCCH.

Option 2-2-1

The PDCCH tracking configuration index may be separately set for each SCS parameter set.

In FIG. 11A shows a table of the general set of parameters for SCS=15 kHz. In FIG. 11B shows a table of the general set of parameters for SCS=30 kHz. In FIG. 12A shows a table of the general set of parameters for SCS=60 kHz. In FIG. 12B shows a table of the general set of parameters for SCS=120 kHz.

Each table contains many sets of parameters (input data). Each parameter set contains a PDCCH tracking configuration index I _M (or range thereof), a tracking frequency N _monitoring [slots], and a slot offset T _offset [slots]. Part of the parameter sets can be reserved. The slot offset can be expressed by an equation that uses I _M .

The UE determines a table based on the SCS configured for CORESET and determines a parameter set based on the GC-PDCCH tracking configuration index. In other words, the UE reads a table that differs depending on the SCS configured for CORESET.

Option 2-2-2

A tracking configuration index of the GC-PDCCH may be given to a parameter set obtained by the communication parameter sets for all SCSs.

As shown in FIG. 13, the table contains a plurality of parameter sets (input data). Each parameter set contains the PDCCH tracking configuration index I _M (or its range), SCS [kHz], tracking frequency N _monitoring [slots], and slot offset T _offset [slots]. Part of the parameter sets can be reserved.

In FIG. 13, PDCCH tracking configuration indexes are given to parameter sets stored in ascending order of tracking cycles. Instead of the table in Fig. 13, the table shown in FIG. 14. Although the information contained in FIG. 14 is similar to the information in FIG. 13, the PDCCH tracking configuration indexes are set to the parameter sets stored in the ascending order of the SCS.

According to Option 2-2 mentioned above, the UE can determine the tracking and slot offset frequencies for both the normal PDCCH and the GC-PDCCH based on single parameter notification and hence reduce the notification overhead compared to Option 1-2.

Radio communication system

Next, a configuration of a radio communication system according to one embodiment of the present invention is disclosed. To provide communication, this radio communication system uses one or a combination of radio communication methods according to each of the above-mentioned embodiments of the present invention.

In FIG. 15 is a diagram illustrating one example of a schematic configuration of a radio communication system according to one embodiment. The radio communication system 1 may use Carrier Aggregation (CA) and/or Dual Connectivity (DC) to group a plurality of fundamental frequency blocks (carrier components), 1 unit of which is the system bandwidth ( e.g. 20 MHz) in an LTE system.

In this regard, the radio system 1 may be referred to as an LTE (Long Term Evolution) system, LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-A ( International Mobile Telecommunications-Advanced), 4th generation mobile communication system (4G), 5th generation mobile communication system (5G), "NR" technology, ("New Radio"; new radio), technology "FRA" ("Future Radio Access"; future radio access) and "New-RAT" technology (New Radio Access Technology; new radio access technology), or a system that implements such technologies.

The radio communication system 1 comprises a radio base station 11, which forms a macro cell C1 with a relatively wide coverage, and radio base stations 12 (12a-12c), which are located within the macro cell C1 and form small cells C2, which are narrower than the macro cell C1. In addition, the user terminal 20 is located in the macro cell C1 and each small cell C2. The location and numbers of the respective cells and user terminals 20 are in no way limited to the aspect shown in FIG. fifteen.

The user terminal 20 can communicate with both the radio base station 11 and the radio base stations 12. It is assumed that the user terminal 20 simultaneously uses macro cell C1 and small cell C2 via CA or DC. In addition, the user terminal 20 may apply CA or DC with multiple cells (CCs) (eg, five CCs or less, or six CCs or more).

The user terminal 20 and the radio base station 11 may communicate using a carrier (also referred to as a legacy "Legacy" carrier) with a relatively narrow bandwidth and a relatively low frequency band (eg, 2 GHz). On the other hand, the user terminal 20 and each radio base station 12 may use a carrier with a wide bandwidth and a relatively high frequency band (for example, 3.5 GHz or 5 GHz) and, or may use the same carrier that is used between the user terminal 20 and the radio base station 11. In this regard, the configuration of the frequency band used by each radio base station is in no way limited to these examples.

In addition, the user terminal 20 can communicate by using Time Division Duplex (TDD) and/or Frequency Division Duplex (FDD) in each cell. Moreover, a single numerology may be applied to each cell (carrier), or many different numerologies may be applied.

Numerology may be a communication parameter applicable to the transmission and/or reception of a particular signal and/or channel, and, for example, may denote at least one of the following parameters: subcarrier spacing, bandwidth, symbol length, cyclic prefix length, subframe length , length of the TTI, number of symbols per TTI, radio frame configuration, specific filtering processing performed by the transceiver in the frequency domain, and specific framing processing performed by the transceiver in the time domain. For example, if the subcarrier spacings of the generated OFDM symbols are different and/or if the numbers of OFDM symbols are different on a particular physical channel, it can be determined that the numerologies are different.

Radio base station 11 and each radio base station 12 (or two radio base stations 12) can be connected via a wired connection (for example, using optical fibers conforming to CPRI (Common Public Radio Interface; Common Public Radio Interface) or X2 interface) or wireless connection.

The radio base station 11 and each radio base station 12 are connected to the higher level station unit 30 and connected to the core network 40 via the higher level station unit 30 . Incidentally, the higher-level station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC) and a mobility management entity (MME), and is not limited to list. In addition, each radio base station 12 can be connected to the higher level station apparatus 30 via the radio base station 11.

Incidentally, the radio base station 11 is a radio base station that has a relatively wide coverage, and may be referred to as a macro base station, a central node, an eNB (eNodeB), or a transmission/reception point. In addition, each radio base station 12 is a radio base station that has local coverage, and may be referred to as a small base station, a micro base station, a pico base station, a femto base station, an eNodeB home node (HeNB), a remote radio unit (RRH, from the English. Remote Radio Head) or transmit/receive point. Hereinafter, radio base stations 11 and 12 will be collectively referred to as radio base station 10 if there is no difference.

Each user terminal 20 is a terminal that supports 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).

The radio communication system 1, as radio access schemes, can apply Orthogonal Frequency-Division Multiple Access (OFDMA) to the downlink and apply Frequency Division Multiple Access on a single carrier (SC-FDMA). Single Carrier Frequency Division Multiple Access) and/or OFDMA to the uplink.

OFDMA is a multi-carrier transmission scheme for communicating by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and displaying data on each subcarrier. SC-FDMA is a single carrier communication scheme that divides the system bandwidth into bands containing one or more contiguous resource blocks per terminal, ensuring that multiple terminals use different bands to eliminate interference between terminals . In this regard, the uplink and downlink radio access schemes are in no way limited to a combination of these schemes, and other radio access schemes may be used.

The radio communication system 1 uses a downlink shared channel (PDSCH: Physical Downlink Shared Channel) which is shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel) and L1/L2 control channels as downlinks. User data, higher layer control information, and a system information block (SIB) are transmitted on the PDSCH. A Basic Information Block (MIB) is transmitted on the PBCH.

The downlink control channel L1/L2 comprises PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indication Channel) and PHICH (Hybrid ARQ Physical Indicator Channel). Downlink Control Information (DCI) containing PDSCH and/or PUSCH scheduling information is transmitted on the PDCCH.

In addition, scheduling information may be communicated by DCI. For example, a DCI providing downlink data reception scheduling may be referred to as a downstream assignment, and a DCI providing uplink data transmission scheduling may be referred to as an upstream grant.

The number of OFDM symbols used for the PDCCH is transmitted on the PCFICH. The transmission acknowledgment information (also referred to, for example, as retransmission control information, HARQ-ACK or ACK/NACK) for HARQ (Hybrid Automatic Repeat Request) for PUSCH may be transmitted on PHICH. EPDCCH is subjected to frequency division multiplexing by PDSCH (downlink common data channel) and is used for DCI transmission in the same way as PDCCH.

The radio communication system 1 uses an uplink common channel (PUSCH: physical uplink common channel) that is shared by each user terminal 20, an uplink control channel (PUCCH: physical uplink control channel) and a random access channel (PRACH: physical random access channel) as uplink channels. ). User data and higher layer control information are transmitted on the PUSCH. In addition, downstream channel quality information (CQI, Channel Quality Indicator; channel quality indicator), transmission confirmation information, and scheduling request (SR, Scheduling Request) are transmitted on the PUCCH. The random access preamble for cell connection establishment is transmitted on the PRACH.

The radio communication system 1 transmits a cell-specific Reference Signal (CRS), a Channel State Information-Reference Signal (CSI-RS), as downstream reference signals, Demodulation Reference Signal (DMRS) and Positioning Reference Signal (PRS). In addition, the radio communication system 1 transmits a sounding reference signal (SRS) and a demodulation reference signal (DMRS) as uplink reference signals. In this regard, DMRS may be referred to as user terminal-specific reference signal (UE-specific reference signal). In addition, the transmitted reference signal is in no way limited to these examples.

base radio

In FIG. 16 is a diagram illustrating one example of a generalized configuration of a radio base station according to one embodiment. The radio base station 10 includes a plurality of transmit/receive antennas 101, gain sections 102 and transmit/receive sections 103, a baseband signal processing section 104, a call processing section 105, and a channel interface 106. In this regard, the radio base station 10 need only be configured to contain one or more of each of the following groups of devices: transmit/receive antennas 101, gain sections 102, and transmit/receive sections 103.

The user data transmitted from the radio base station 10 to the user terminal 20 on the downlink is input from the higher level station apparatus 30 to the baseband signal processing section 104 via the channel interface 106 .

The baseband signal processing section 104 performs Packet Data Convergence Protocol (PDCP) layer processing, segmentation and connection of user data, RLC (Radio Link Control) layer transmission processing, such as retransmission control. by RLC, retransmission control by medium access control (MAC) (e.g., hybrid automatic retransmission request (HARQ) processing), and transmission processing, e.g., scheduling, transmission format selection, channel coding, inverse fast Fourier transform processing (IFFT, from the English. Inverse Fast Fourier Transform), and precoding processing, and transmits user data to each section 103 transmission/reception. In addition, the baseband signal processing section 104 also performs transmission processing such as channel coding and inverse fast Fourier transform on the downlink control signal, and transmits the downlink control signal to each transmit/receive section 103.

Each transmission/reception section 103 converts the baseband signal pre-coded and output to each antenna from the baseband signal processing section 104 into a radio frequency band and transmits the radio frequency signal. The RF signal subjected to frequency conversion in each transmission/reception section 103 is amplified by each amplification section 102, and transmitted from each transmission/reception antenna 101. The transmit/receive sections 103 may be formed by transmitters/receivers, transmit/receive circuits, or transmit/receive apparatuses disclosed on the basis of public knowledge in the art according to the present invention. In this regard, the transmission/reception sections 103 may be formed as an integrated transmission/reception section, or may be composed of transmission sections and reception sections.

Meanwhile, each amplifying section 102 amplifies the RF signal received by each transmit/receive antenna 101 as an uplink signal. Each transmission/reception section 103 receives an uplink signal amplified by each gain section 102. Each transmission/reception section 103 performs frequency conversion of the received signal into a baseband signal and outputs the baseband signal to the baseband signal processing section 104 .

The baseband signal processing section 104 performs Fast Fourier Transform (FFT) processing, Inverse Discrete Fourier Transform (IDFT) processing, error correction decoding, controlled reception processing MAC retransmission, and receiving processing of the RLC layer and the PDCP layer, with respect to the user data included in the input uplink signal, and transmits the user data to the higher level station apparatus 30 via the channel interface 106 . The call processing section 105 performs call processing (eg, configuration and disconnection) for communication channels, state control of the radio base station 10, and radio resource management.

The channel interface 106 transmits and receives signals to and from the higher level station apparatus 30 via a predetermined interface. In addition, the channel interface 106 can transmit and receive signals (transmit signals in the reverse direction) to and from another radio base station 10 via an interface between base stations (for example, optical fibers corresponding to a common open radio interface (CPRI) or X2 interface).

In addition, each transmit/receive section 103 transmits downlink control information (DCI) via the normal PDCCH or GC-PDCCH to the user terminal 20.

Each transmit/receive section 103 can transmit information related to PDCCH tracking cycles for BWP/CC tracking, information related to relationship between numerologies and tracking cycles, information related to cell-specific tracking cycle, information related to BWP-specific cycle. tracking, and information related to the CC-specific tracking frequency.

In FIG. 17 is a diagram illustrating one example of a functional configuration of a radio base station according to one embodiment of the present invention. In addition, this example mainly shows the functional blocks of the characteristic parts according to the considered embodiment, and it is assumed that the radio base station 10 contains other functional blocks that are also necessary for radio communication.

The baseband signal processing section 104 includes at least a control (scheduler) section 301, a transmission signal generation section 302, a mapping section 303, a received signal processing section 304, and a measurement section 305. In addition, these components need only be contained in the radio base station 10, however, some or all of these components may not be contained in the baseband signal processing section 104 .

The control section 301 (scheduler) controls the entire radio base station 10. The control section 301 may be formed by a controller, a control loop, or a control apparatus disclosed based on public knowledge in the art according to the present invention.

The control section 301 controls, for example, signal generation in the transmission signal generation section 302 and signal distribution by the display section 303 . In addition, the control section 301 controls signal reception processing in the received signal processing section 304 and signal measurement in the measurement section 305.

The control section 301 controls the scheduling (eg, resource allocation) of the system information, the downlink data signal (eg, the signal transmitted on the PDSCH), and the downlink control signal (eg, the signal transmitted on the PDCCH and/or EPDCCH, and, for example, is transmission confirmation information). In addition, the control section 301 controls the generation of the downlink control signal and the downlink data signal based on the result obtained by determining whether or not to control the retransmission of the uplink data signal.

The control section 301 controls the scheduling of synchronization signals (for example, Primary Synchronization Signal (PSS)/Secondary Synchronization Signal (SSS)) and downstream reference signals (for example, CRS, CSI-RS and DMRS).

The control section 301 controls the scheduling of the uplink data signal (for example, the signal transmitted on PUSCH), the uplink control signal (for example, the signal transmitted on PUCCH and/or PUSCH and is, for example, transmission acknowledgment information), the random access preamble (for example, , the signal transmitted on the PRACH) and the uplink reference signal.

In addition, the control section 301 may determine the tracking configuration of the downlink control channel, and notify the user terminal 20 of information related to the tracking configuration (eg, tracking periodicity, slot offset, symbol offset, and tracking duration).

The downlink control channel disclosed in this specification may, for example, be a normal PDCCH or a GC-PDCCH. In addition, the control for the frequency resource may be frequency resource transmission/reception processing based on SFI, or frequency resource transmission/reception processing based on scheduling (downstream assignment or upstream grant).

The transmission signal generation section 302 generates a downstream signal (eg, downstream control signal, downstream data signal, or downstream reference signal) based on an instruction from the control section 301, and outputs the downstream signal to the display section 303 . The transmission signal generating section 302 may be formed by a signal generator, a signal generating circuit, or a signal conditioning apparatus disclosed based on the public knowledge in the art according to the present invention.

For example, the transmission signal generating section 302 creates a downstream assignment for reporting downstream data allocation information and/or an upstream grant for forwarding upstream data allocation information, based on an instruction from control section 301 . The downstream assignment and upstream grant are both DCI, and conform to the DCI format. In addition, the transmission signal generating section 302 performs encoding processing and modulation processing on the downlink data signal according to the encoding rate and modulation scheme, which are determined based on the channel state information (CSI) from each user terminal 20.

The display section 303 maps the downstream signal generated by the transmission signal generation section 302 to the specified radio resources based on the instruction from the control section 301, and outputs the downstream signal to each transmission/reception section 103. The display section 303 may be formed by a display, a display circuit, or a display apparatus disclosed based on public knowledge in the art according to the present invention.

The received signal processing section 304 performs reception processing (eg, demapping, demodulation, and decoding) on the received signal inputted from each transmission/reception section 103. Incidentally, the received signal is, for example, an uplink signal (for example, an uplink control signal, an uplink data signal, or an uplink reference signal) transmitted from the user terminal 20. The received signal processing section 304 may be formed by a signal processor, a processing loop signals or signal processing apparatus disclosed on the basis of publicly available knowledge in the field of technology according to the present invention.

The received signal processing section 304 outputs the information decoded during the reception processing to the control section 301 . For example, when receiving a PUCCH containing a HARQ-ACK, the received signal processing section 304 outputs the HARQ-ACK to the control section 301 . In addition, the received signal processing section 304 outputs the received signal and/or the signal after receiving processing to the measurement section 305.

The measurement section 305 measures the received signal. Measuring section 305 may be formed by a measuring tool, measuring circuit or measuring apparatus disclosed based on the public knowledge in the field of technology according to the present invention.

For example, the measurement section 305 may perform Radio Resource Management (RRM) measurement or Channel State Information (CSI) measurement based on the received signal. The measuring section 305 can measure the received power (for example, the power of the received reference signal (RSRP, from the English Reference Signal Received Power)), the received quality (for example, the quality of the received reference signal (RSRQ, from the English Reference Signal Received Quality)), the ratio signal-mixture of interference with noise (SINR, from the English Signal to Interference plus Noise Ratio) or the signal-to-noise ratio (SNR, from the English Signal to Noise Ratio), signal intensity (for example, the received signal power indicator (RSSI, from the English Received Signal Strength Indicator)) or channel information (such as CSI). The measurement section 305 may output the measurement result to the control section 301 .

User terminal

In FIG. 18 is a diagram illustrating one example of a generalized configuration of a user terminal according to one embodiment. The user terminal 20 includes a plurality of transmit/receive antennas 201, gain sections 202 and transmit/receive sections 203, a baseband signal processing section 204, and an application section 205. In this regard, the user terminal 20 should simply be configured to contain one or more from each of the following groups of devices: transmit/receive antennas 201, gain sections 202, and transmit/receive sections 203.

Each gain section 202 amplifies the RF signal received at each transmit/receive antenna 201. Each transmission/reception section 203 receives a downstream signal amplified by each gain section 202. Each transmission/reception section 203 frequency converts the received signal into a baseband signal and outputs the baseband signal to the baseband signal processing section 204 . The transmit/receive sections 203 may be formed by transmitters/receivers, transmit/receive circuits, or transmit/receive apparatuses disclosed based on publicly available knowledge in the art according to the present invention. In this regard, the transmission/reception sections 203 may be formed as an integrated transmission/reception section, or may be composed of transmission sections and reception sections.

The baseband signal processing section 204 performs, with respect to the input baseband signal, FFT processing, error correction decoding, and reception processing with retransmission control. The baseband signal processing section 204 transmits the downstream user data to the application section 205. The application section 205 performs processing related to higher layers that are above the physical layer and the MAC layer. In addition, the baseband signal processing section 204 may transmit downlink data broadcast information to the application section 205 as well.

Meanwhile, the application section 205 inputs uplink user data to the baseband signal processing section 204 . The baseband signal processing section 204 performs retransmission control processing (eg, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, and IFFT processing, and transmits upstream user data to each transmission/reception section 203 .

Each transmit/receive section 203 converts the baseband signal output from the baseband signal processing section 204 to RF and transmits the RF signal. The radio frequency signal subjected to frequency conversion in each transmission/reception section 203 is amplified by each amplification section 202 and transmitted from each transmission/reception antenna 201.

Moreover, each transmit/receive section 203 may receive a downlink control channel (eg, a normal PDCCH and/or GC-PDCCH).

In addition, each transmit/receive section 203 may receive downlink control information (DCI) via a conventional PDCCH or GC-PDCCH. For example, DCI may contain SFI.

Each transmit/receive section 203 may receive information related to the PDCCH tracking configuration (eg, tracking periodicity, slot offset, symbol offset, and tracking duration), information related to the relationship between numerologies (eg, SCS) and tracking configuration), information, CORESET configuration related information and SCS related information from the radio base station.

In FIG. 19 is a diagram illustrating one example of a functional configuration of a user terminal according to one embodiment. In addition, this example mainly illustrates the functional blocks of the characteristic parts according to this embodiment, and it is assumed that the user terminal 20 contains other functional blocks that are also necessary for radio communication.

The baseband signal processing section 204 provided in the user terminal 20 includes at least a control section 401, a transmission signal generation section 402, a display section 403, a received signal processing section 404, and a measurement section 405. It should be noted that these components need only be contained in the user terminal 20, some or all of these components may not be included in the baseband signal processing section 204 .

The control section 401 controls the entire user terminal 20. The control section 401 may be formed by a controller, a control loop, or a control apparatus disclosed based on public knowledge in the art according to the present invention.

The control section 401, for example, controls the generation of signals in the transmission signal generation section 402 and the distribution of signals through the display section 403. In addition, the control section 401 controls the signal reception processing in the received signal processing section 404 and the signal measurement in the measurement section 405.

The control section 401 receives from the received signal processing section 404 the downlink control signal and the downlink data signal transmitted from the radio base station 10. The control section 401 controls the generation of the uplink control signal and/or the uplink data signal, based on the result obtained when determining whether or not to in controlling the retransmission of the downlink control signal and/or the downlink data signal.

In addition, the subcarrier spacing may be configured for the control section 401 . In addition, control section 401 may control tracking of a downlink control channel (eg, conventional PDCCH and/or GC-PDCCH) using the periodicity and start time offset associated with the subcarrier spacing.

In addition, the control section 401 can control tracking using at least one of the following parameters: slot unit offsets (slot offsets or tracking offsets), symbol unit offsets (symbol offsets), and tracking duration associated with subcarrier spacing (aspect 1 ).

In addition, the control section 401 may determine the tracking period and offset of the first downlink control channel (normal PDCCH), which is specific to the user terminal 20, and determine the tracking period and offset of the second downlink control channel (eg, GC-PDCCH), which is general. for a group of user terminals (aspect 2/option 1).

In addition, the control section 401 may determine the periodicity and offset that are used for both tracking the first downlink control channel, which is specific to the user terminal, and tracking the second downlink control channel, which is common to a group of user terminals.

In addition, a plurality of parameters, each including a periodicity and an offset, may be configured in advance for the control section 401, where the control section 401 may control the monitoring of at least one of the following channels: a first downlink control channel and a second downlink control channel, using one of the many parameter sets (aspect 2/option 1-2 and 2-2).

In addition, when receiving from the received signal processing section 404 various pieces of information sent from the radio base station 10, the control section 401 can update the parameters used for control based on the various pieces of information.

The transmission signal generation section 402 generates an uplink signal (eg, an uplink control signal, an uplink data signal, or an uplink reference signal) based on an instruction from the control section 401, and outputs the uplink signal to the display section 403. The transmission signal generating section 402 may be formed by a signal generator, a signal generating circuit, or a signal conditioning apparatus disclosed based on the public knowledge in the art according to the present invention.

For example, the transmission signal generation section 402 generates an uplink control signal related to transmission confirmation information and channel state information (CSI) based on the instruction from the control section 401. In addition, the transmission signal generation section 402 generates an uplink data signal based on the instruction from the control section 401 . For example, when the downlink control signal from the radio base station 10 contains an uplink grant, the control section 401 directs instructions to the transmission signal generating section 402 to generate an uplink data signal.

The mapping section 403 maps the uplink signal generated in the transmission signal generation section 402 to radio resources based on the instruction from the control section 401, and outputs the uplink signal to each transmission/reception section 203. The display section 403 may be formed by a display, a display circuit, or a display apparatus disclosed based on public knowledge in the art according to the present invention.

The received signal processing section 404 performs reception processing (eg, demapping, demodulation, and decoding) of the received signal inputted from each transmission/reception section 203. Incidentally, the received signal is, for example, a downlink signal (for example, a downlink control signal, a downlink data signal, or a downlink reference signal) transmitted from the radio base station 10. The received signal processing section 404 may be formed by a signal processor, a processing loop signals or signal processing apparatus disclosed on the basis of publicly available knowledge in the field of technology according to the present invention. In addition, the received signal processing section 404 may be formed by receiving sections according to the present invention.

The received signal processing section 404 outputs the information decoded in the reception processing to the control section 401 . The received signal processing section 404 outputs, for example, broadcast information, system information, RRC and DCI signaling to the control section 401 . In addition, the received signal processing section 404 outputs the received signal and/or the signal after receiving processing to the measurement section 405.

The measurement section 405 performs a measurement with respect to the received signal. Measuring section 405 may be formed by a measuring tool, measuring circuit, or measuring apparatus disclosed based on publicly available knowledge in the field of technology according to the present invention.

For example, the measurement section 405 may perform an RRM measurement or a CSI measurement based on the received signal. Measurement section 405 may measure received power (eg, RSRP), received quality (eg, RSRQ, SINR, or SNR), signal strength (eg, RSSI), or channel information (eg, CSI). The measuring section 405 may output the measurement result to the control section 401 .

Hardware configuration

Additionally, the block diagrams used to describe the above embodiment illustrate blocks in functional units. These functional blocks (components) are implemented through an optional combination of hardware and/or software. In addition, the implementation method of each function block is not limited to a specific method. That is, each functional block may be implemented by one physically and/or logically connected apparatus, or may be implemented using a plurality of these apparatuses formed by connecting two or more physically and/or logically independent apparatuses, directly and/or indirectly (with using, for example, a wired and/or wireless connection).

For example, a radio base station and a user terminal according to one embodiment of the present invention may function as computers that process the radio communication method according to the present invention. In FIG. 20 is a diagram illustrating one example of hardware configurations of a radio base station and a user terminal according to one embodiment. The radio base station 10 and user terminals 20 mentioned above may each be physically configured as a computing device including a processor 1001, a memory 1002, a storage device 1003, a communication device 1004, an input device 1005, an output device 1006, and a bus 1007.

In this regard, in the following description, the term "apparatus" can be interpreted as a circuit, device or unit. The hardware configurations of radio base station 10 and user terminal 20 may be configured to include one or more of the apparatuses illustrated in FIG. 20, or may be performed without some parts of the apparatus.

For example, in FIG. 20, only processor 1001 is shown. However, multiple processors may be provided. In addition, the processing may be performed by 1 processor, or the processing may be performed by 1 or more processors simultaneously or sequentially or using another method. In addition, the processor 1001 may be configured with 1 or more chips.

Each function of radio base station 10 and user terminal 20 is implemented, for example, by allowing hardware, such as processor 1001 and memory 1002, to read predetermined software(s) and thereby cause processor 1001 to perform operation and control of communication by the communication apparatus 1004 and control of reading and/or writing data to the memory 1002 and the storage device 1003.

The processor 1001, for example, initiates an operating system to control the entire computer. The processor 1001 may be formed by a central processing unit (CPU, from the English Central Processing Unit) containing an interface for a peripheral apparatus, a control apparatus, a computing apparatus, and a register. For example, the baseband signal processing section 104 (204) and call processing section 105 mentioned above may be implemented by the processor 1001.

In addition, the processor 1001 reads programs (program codes), a program module, or data from the storage device 1003 and/or communication device 1044 into the memory 1002, and performs various types of processing in accordance with these programs, program module, or data. With regard to programs, programs are used that cause the computer to perform at least some of the operations disclosed in the above embodiment. For example, the control section 401 of the user terminal 20 may be implemented by a control program stored in the memory 1002 and executed in the processor 1001, and other functional blocks may be implemented in a similar manner.

The memory 1002 may be a computer-readable storage medium, and may be formed, for example, by at least one of the following: read-only memory (ROM), erasable programmable ROM (EPROM), electrically erasable programmable ROM (EEPROM), random access memory (RAM). RAM) and other suitable storage media. Memory 1002 may also be referred to as a register, cache, or main memory (main storage). Memory 1002 may store programs (program codes) and a program module that may be implemented to implement a radio communication method according to one embodiment.

The drive 1003 is a computer-readable storage medium and may be formed by, for example, at least one of the following: a floppy disk, a floppy disk (registered trademark), a magneto-optical disk (for example, a compact disc (CD-ROM )), Digital Versatile Disc and Blu-Ray Disc (registered trademark)), Removable Disk, Hard Disk Drive, Smart Card, Flash Memory Device (such as a card, mass storage or flash drive), Magnetic Stripe, Database, server and other suitable storage medium. The drive 1003 may also be referred to as an auxiliary storage device.

The communication apparatus 1004 is a hardware (transmitting/receiving device) that communicates between computers via wired and/or wireless networks, and which may also be referred to as, for example, a network device, a network controller, a network card, and a communication module. The communication apparatus 1004 may be configured to include a high frequency switch, a duplexer, a filter, and a frequency synthesizer to implement, for example, frequency division duplexing (FDD) and/or time division duplexing (TDD). For example, the aforementioned transmit/receive antennas 101 (201), amplification sections 102 (202), transmit/receive sections 103 (203), and channel interface 106 may be implemented by the communication apparatus 1004.

The input apparatus 1005 is an input device (eg, keyboard, mouse, microphone, switch, button, or sensor) that receives input from outside. The output apparatus 1006 is an output device (eg, a display, a speaker, or a Light Emitting Diode) that sends output data to the outside. In addition, the input apparatus 1005 and the output apparatus 1006 may be an integrated component (eg, a touch panel).

In addition, each apparatus such as processor 1001 or memory 1002 is connected via a bus 1007 to transmit information. Bus 1007 may be made using a single bus or may be formed by different buses that differ from machine to machine.

In addition, 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) or an application-specific integrated circuit (ASIC). Specific Integrated Circuit), a programmable logic device (PLD, from the English Programmable Logic Device) and a user-programmable gate array (FPGA, from the English Field Programmable Gate Array). Such hardware may be used to implement some or all of each functional block. For example, processor 1001 may be implemented with at least one of these types of hardware.

Modified Example

In addition, each term disclosed in this description and/or each term necessary for the understanding of this description, can be replaced by other concepts that have the same or similar meanings. For example, the channel and/or symbol may be replaced by signals (signaling information). In addition, the signal may be a message. The reference signal may also be abbreviated to RS (Reference Signal; reference signal) or may also be referred to as pilot or pilot signal, depending on the applicable standards. Moreover, a component carrier (CC) may be referred to as cell, carrier, and carrier frequency.

Moreover, a radio frame may consist of one or more periods (frames) in the time domain. Each of the one or multiple periods (frames) that make up a radio frame may be referred to as a "subframe". In addition, a subframe may consist of one or more slots in the time domain. A subframe may have a fixed time duration (eg, 1 ms) that is independent of numerologies.

In addition, a slot may contain one or more symbols (for example, OFDM (Orthogonal Frequency Division Multiplexing) symbols or SC-FDMA (Single Carrier Frequency Division Multiple Access) symbols in the time domain. In addition, a slot may represent a unit of time , based on numerology.Moreover, a slot may contain multiple minislots.Each minislot may consist of one or more symbols in the time domain.Also, a minislot may be referred to as a subslot.

Each of the following concepts: radio frame, subframe, slot, minislot, and symbol, denotes a unit of time for signaling. Other appropriate names may be used to refer to a radio frame, subframe, slot, minislot, and symbol. For example, 1 subframe may be referred to as a transmission time interval (TTI), a plurality of adjacent subframes may be referred to as a TTI, or 1 slot or 1 minislot may be referred to as a TTI. That is, the subframe and/or TTI may be a subframe (1 ms) according to the existing LTE scheme, may be a period (eg, 1 to 13 symbols) shorter than 1 ms, or may be a period longer than 1 ms. Moreover, the unit that stands for TTI may be referred to as a slot or minislot instead of a subframe.

In this regard, TTI refers to, for example, a minimum unit of radio scheduling time. For example, in an LTE system, a radio base station performs scheduling to allocate radio resources (frequency bandwidth or transmission power that can be used in each user terminal) in units of TTI for the user terminal. In this regard, the definition of TTI is not limited to the above example.

The TTI may be a unit of transmission time of a data packet (transport blocks) that undergo channel, code block, and/or codeword coding, or may be a processing unit in link scheduling or adaptation. Moreover, given the TTI, the time period (eg, number of symbols) in which the transport block, code block, and/or codeword is actually displayed may be shorter than the TTI.

In addition, when 1 slot or 1 minislot is referred to as a TTI, 1 or more TTIs (ie, 1 or more slots or 1 or more minislots) may represent a minimum unit of scheduling time. In addition, the number of slots (number of minislots) that constitutes the minimum unit of scheduling time can be controlled.

A TTI having a time duration of 1 ms may be referred to as a normal TTI (TTI according to versions 8 to 12 of the LTE scheme), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe. A TTI shorter than a regular TTI may be referred to as a reduced TTI, a short TTI, a partial or partial TTI, a reduced subframe, a short subframe, a minislot, or a subslot.

In addition, a long TTI (eg, total TTI or subframe) may be interpreted as a TTI having a duration greater than 1 ms, and a short TTI (eg, reduced TTI) may be interpreted as a TTI having a TTI length shorter than the TTI length of the long TTI and equal to or exceeding 1 ms.

A resource block (RB) is a unit of resource allocation in the time domain and frequency domain, and may contain one or more contiguous subcarriers in the frequency domain. In addition, the RB may contain one or more symbols in the time domain, or may be 1 slot, 1 minislot, 1 subframe, or 1 TTI in length. 1 TTI or 1 subframe, each may be formed by one or more resource blocks. In this regard, one or more RBs can be referred to as a physical resource block (PRB, from the English Physical Resource Block), a subcarrier group (SCG, from the English Sub-Carrier Group), a group of resource elements (REG, from the English Resource Element Group ), a pair of PRBs, or a pair of RBs.

In addition, a resource block may be formed by one or multiple resource elements (REs). For example, 1 RE may represent a radio resource area of 1 subcarrier and 1 symbol.

In this regard, the structures of the radio frame, subframe, slot, minislot, and symbol described above are only examples. For example, configurations such as the number of subframes included in a radio frame, the number of slots per subframe or radio frame, the number of minislots included in a slot, the number of symbols and RBs included in a slot or minislot, the number of subcarriers included in a RB, the number of symbols in a TTI , the character length and the length of the cyclic prefix (CP, from the English Cyclic Prefix) can vary in various ways.

In addition, the information and parameters disclosed in this specification may be expressed in terms of absolute values, may be expressed in terms of relative values relative to predetermined values, or may be expressed in terms of other relevant information. For example, a radio resource may be designated by a given index.

The names used to refer to the parameters in this specification are by no means limiting names. For example, the different channels (Physical Uplink Control Channel (PUCCH) and Physical Downlink Control Channel (PDCCH)) and information elements can be denoted with different suitable names. Thus, the various names associated with these various channels and information items are by no means limiting names.

The information and signals disclosed in this description may be expressed using any of numerous different technologies. For example, the data, instructions, commands, information, signals, bits, symbols, and circuits mentioned throughout the foregoing may be expressed in terms of voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, optical fields or photons, or their optional combinations.

In addition, information and signals may be provided from high levels to low levels and/or from low levels to high levels. Information and signals may be input and output via a plurality of network nodes.

Input and output information and signals may be stored in a dedicated location (eg memory) or may be controlled by a control table. Input and output information and signals can be overwritten, updated or additionally recorded. Output information and signals can be removed. Input information and signals can be transferred to other devices.

Notification of information is not limited to the aspect/embodiment disclosed in this specification, and may be implemented using other methods. For example, forwarding information can be implemented by physical layer signaling (eg, downlink control information (DCI) and uplink control information (UCI)), higher layer signaling (eg, radio resource control (RRC) signaling), broadcast information (basic information block ( MIB) and System Information Block (SIB)) and Media Access Control (MAC) signaling), other signals, or combinations thereof.

Further, the physical layer signaling may be referred to as layer 1/layer 2 (L1/L2) control information (L1/L2 control signals) or L1 control information (L1 control signal). In addition, the RRC signaling may be referred to as an RRC message and may, for example, be an RRC Connection Setup (RRCConnectionSetup) message or an RRC Connection Reconfiguration (RRCConnectionReconfiguration) message. In addition, the MAC signaling report may be forwarded using, for example, a MAC control element (MAC CE).

Moreover, notification of predetermined information (eg, notification of "X present") is not limited to explicit notification, and may be done implicitly (eg, without notification of predetermined information or by notification of other information).

Decisions may be made based on a value (0 or 1) expressed as 1 bit, may be made based on a Boolean value expressed as true or false, or may be made by comparing numerical values (e.g., comparison with a given value).

Whether software is referred to as software, firmware, middleware, microcode, or hardware description language, or is referred to by other names, software should be interpreted broadly to mean an instruction, set of instructions, code, code segment, program code, program, subroutine, program module, application, program application, program package, routine, subprogram, object, executable, thread of execution, procedure, or function.

Also, software, commands, and information can be transmitted and received via a transmission medium. When, for example, software is transferred from websites, servers, or other remote sources using wired technologies (such as coaxial cables, fiber optic cables, twisted pairs and digital subscriber lines (DSL, from English Digital Subscriber Line), etc.) and/or radio technologies (eg, infrared and microwaves), these wired technologies and/or wireless technologies are part of the definition of a transmission medium.

The terms "system" and "network" as used herein are used interchangeably.

In this description, the terms "base station (BS)", "radio base station", "eNB", "gNB", "cell", "sector", "group of cells", "carrier" and "carrier component" can be used synonymous. In some cases, the base station may also be referred to as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, receiving point, "femto cell" or "small cell".

A base station may contain one or multiple (eg, three) cells (also referred to as sectors). If the base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of small areas. Each small area can also provide a communication service via a base station subsystem (eg, indoor small base station (RRH: remote radio unit)). The term “cell” or “sector” refers to a part of the coverage area or the entire coverage area of a base station and/or base station subsystem that provides communication service in that coverage.

In this description, the terms "mobile station (MS)", "user terminal", "user equipment (UE)" and "terminal" can be used synonymously.

A mobile station may in some cases be referred to by those skilled in the art as a user terminal, mobile unit, subscriber station, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile user terminal, access terminal, mobile terminal , wireless terminal, remote terminal, handset, user agent, mobile client, client, or other suitable names.

In addition, the radio base station in this description can be interpreted as a user terminal. For example, each aspect/embodiment of the present invention can be applied to a configuration in which communication between a radio base station and a user terminal is replaced by communication between a plurality of user terminals (D2D: device-to-device). In this case, the user terminal 20 may be configured to have the functions of the above radio base station 10. In addition, words such as "uplink" and "downlink" can be interpreted as "side". For example, an ascending channel can be interpreted as a side channel.

Similarly, the user terminal in this description can be interpreted as a radio base station. In this case, the radio base station 10 may be configured to have the functions of the user terminal 20 mentioned above.

The operations disclosed in this description and performed by the base station are performed by the upper node of this base station, depending on the cases. Obviously, in a network containing one or more network nodes having base stations, various operations performed for communication with the terminal can be performed by base stations, one or more network nodes (for example, mobility management nodes (MME) or serving gateways (S-GW, from the English Serving-Gateways), without limitation to these examples), other than base stations, or a combination thereof.

Each aspect/embodiment disclosed in this specification may be used alone, may be used in combination, or may be switched and used in implementation. In addition, the orders of processing procedures, sequences and flowcharts according to each aspect/embodiment disclosed in this description, can be changed, if there are no contradictions. For example, the method disclosed herein has the various elements of the steps listed in exemplary order, and is not limited to the specific order presented here.

Each aspect/embodiment disclosed herein can be applied to the LTE (Long Term Evolution; Long Term Evolution) scheme, LTE Advanced (LTE-A), LTE-B (LTE-Beyond), SUPER 3G, IMT-A schemes, 4th generation (4G) mobile communication systems, 5th generation (5G) mobile communication systems, future radio access ("FRA"), "New-RAT" ("Radio Access Technology") technologies, "NR" ("New Radio"), "NX" ("New Radio Access") technologies, "FX" technologies (future generation radio access systems), global system for mobile communications (GSM, from the English Global System for Mobile communications) ( registered trademark), CDMA2000, Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802.20, ultra-wide bandwidth (UWB, Ultra-WideBand), Bluetooth (registered trademark), systems that use other suitable radio communication methods, and/or next generation systems that expand based on these systems.

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

Each reference to elements for which terms such as "first" and "second" are used in the present invention does not generally limit the number or order of these elements. These names are used in this specification for convenience only, as a way to distinguish between two or more elements. Thus, referring to the first and second elements does not mean that only two elements are allowed, or that the first element must precede the second element in some way.

The concept of "decision maker (determining)", used in the present description, in some cases, may include a wide variety of operations. For example, "deciding (determining)" may refer to "making decisions (determining)" about computation, calculation, processing, obtaining, exploring, searching (for example, searching in a table, database, or other data structures), and establishing. In addition, "decision maker (determiner)" can refer to "deciding (determining)" about receiving (e.g., receiving information), transmitting (e.g., transmitting information), input, output, and accessing (e.g., accessing data in mind). In addition, "deciding (determining)" can refer to "deciding (determining)" about resolution, selection, selection, establishment, and comparison. In other words, "deciding (determining)" can refer to "making a decision (determining)" in relation to some operation.

The words "connected" and "coupled" as used in this description, or any modification of these words, may refer to all direct or indirect connections or connections between 2 or more elements, and may include 1 or more intermediate elements between two elements, " connected" or "linked" to each other. Elements may be linked or connected physically or logically, or through a combination of physical and logical connections. For example, "connection" can be interpreted as "access".

It should be understood that in this description, in the case of connection, two elements can be considered as "connected" or "connected" to each other using 1 or more electrical cables, wires and/or printed electrical connection, and in some non-limiting and non-limiting examples, using electromagnetic energy having wavelengths in the radio frequency bands, microwave bands and/or (both visible and invisible) optical regions.

In this description, the phrase that "A and B are different" can mean that "A and B are different from each other." Concepts such as "separate" and "connected" should also be interpreted by analogy.

If words such as "comprising" and "comprising" and modifications of these words are used in the present description or in the claims, then these words should be understood as inclusive, by analogy with the use of the word "having". In addition, the word "or" used in the present description or in the claims is not an exclusive "or".

The present invention has been detailed above. However, one skilled in the art will appreciate that the present invention is not limited to the embodiment disclosed herein. The present invention may be implemented with various modified and modified aspects without departing from the spirit and scope of the present invention as defined by the appended claims. Accordingly, the foregoing description is for the purpose of illustrating examples only and should not be construed as limiting the present invention in any way.

Claims (24)

1. Terminal containing: a receiving section configured to receive a terminal-specific first configuration for tracking a first physical downlink control channel (PDCCH) carrying downlink control information for scheduling one of a physical uplink common channel and a physical downlink common channel, and capable of receiving a second configuration for tracking a second a physical downlink control channel (PDCCH) carrying downlink control information common to a group of terminals; and a control section configured to track the first physical downlink control channel (PDCCH) based on the first configuration and to track the second physical downlink control channel (PDCCH) based on the second configuration, wherein each of the first configuration and the second configuration includes a number of tracking interval slots of a corresponding physical downlink control channel (PDCCH), a number of tracking offset slots of a corresponding physical downlink control channel (PDCCH), a tracking start symbol of a corresponding physical downlink control channel (PDCCH), and a duration. tracking the corresponding physical downlink control channel (PDCCH). 2. The terminal of claim 1, wherein the receiving section is configured to receive a control resource set (CORESET) configuration indicating a control resource set (CORESET), wherein the control section is configured to access the CORESET configuration to monitor the second PDCCH. 3. A radio communication method for a terminal, comprising the steps of: receiving a terminal-specific first configuration for tracking a first physical downlink control channel (PDCCH) carrying downlink control information for scheduling one of the physical uplink common channel and the physical downlink common channel; receiving a second configuration for tracking a second physical downlink control channel (PDCCH) carrying downlink control information common to a group of terminals; and tracking the first physical downlink control channel (PDCCH) based on the first configuration and monitoring the second physical downlink control channel (PDCCH) based on the second configuration, wherein each of the first configuration and the second configuration includes a number of tracking interval slots of a corresponding physical downlink control channel (PDCCH), a number of tracking offset slots of a corresponding physical downlink control channel (PDCCH), a tracking start symbol of a corresponding physical downlink control channel (PDCCH), and a duration. tracking the corresponding physical downlink control channel (PDCCH). 4. Base station, containing: a transmission section configured to transmit a terminal-specific first configuration for tracking a first physical downlink control channel (PDCCH) carrying downlink control information for scheduling one of a physical uplink common channel and a physical downlink common channel, and capable of transmitting a second configuration for tracking a second a physical downlink control channel (PDCCH) carrying downlink control information common to a group of terminals; and a control section configured to control the transmission of the first physical downlink control channel (PDCCH) based on the first configuration and capable of controlling the transmission of the second physical downlink control channel (PDCCH) based on the second configuration, wherein each of the first configuration and the second configuration includes a number of tracking interval slots of a corresponding physical downlink control channel (PDCCH), a number of tracking offset slots of a corresponding physical downlink control channel (PDCCH), a tracking start symbol of a corresponding physical downlink control channel (PDCCH), and a duration. tracking the corresponding physical downlink control channel (PDCCH). 5. A radio communication system comprising a terminal and a base station, where the terminal contains: a receiving section configured to receive a terminal-specific first configuration for tracking a first physical downlink control channel (PDCCH) carrying downlink control information for scheduling one of a physical uplink common channel and a physical downlink common channel, and capable of receiving a second configuration for tracking a second a physical downlink control channel (PDCCH) carrying downlink control information common to a group of terminals; and a control section configured to track the first physical downlink control channel (PDCCH) based on the first configuration and to track the second physical downlink control channel (PDCCH) based on the second configuration, wherein each of the first configuration and the second configuration includes a number of tracking interval slots of a corresponding physical downlink control channel (PDCCH), a number of tracking offset slots of a corresponding physical downlink control channel (PDCCH), a tracking start symbol of a corresponding physical downlink control channel (PDCCH), and a duration. tracking the corresponding physical downlink control channel (PDCCH), while the base station contains: a transmission section configured to transmit a first configuration and capable of transmitting a second configuration; and a control section configured to control the transmission of the first physical downlink control channel (PDCCH) based on the first configuration and capable of controlling the transmission of the second physical downlink control channel (PDCCH) based on the second configuration.

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