CN114009116A - Terminal and communication method - Google Patents

Abstract

The terminal has: a receiving unit that receives resource allocation information of a frequency domain; a control unit that determines a resource of a frequency domain used for uplink transmission that is interleaved in the frequency domain, based on information indicating a virtual frequency domain resource mapped to an actual frequency domain resource, the information being included in the resource allocation information; and a transmitting unit which monitors the determined frequency domain resources and transmits an uplink using the determined frequency domain resources when an idle state is detected.

Description

Terminal and communication method

Technical Field

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

Background

In NR (New Radio: New air interface) (also referred to as "5G") which is a system succeeding lte (long Term evolution), a technology satisfying a large capacity system, high data transmission speed, low delay, simultaneous connection of a plurality of terminals, low cost, power saving, and the like as requirements is being studied (for example, non-patent document 1).

In the LTE wireless system, an LAA (licensed Assisted Access) technology is specified which uses a 5GHz band, which is an unlicensed band, as a downlink of a CA (Carrier Aggregation) (for example, non-patent document 2). In the LAA technique, for example, LBT (Listen Before Talk) based channel access and Partial subframe (Partial subframe) transmission are adopted.

Documents of the prior art

Non-patent document

Non-patent document 1: 3GPP TS 38.300 V15.5.0(2019-03)

Non-patent document 2: 3GPP TR 36.889 V13.0.0(2015-06)

Disclosure of Invention

Problems to be solved by the invention

In the NR wireless communication system, a technique involving NR-U (New Radio Unlicensed: New air interface Unlicensed) using an Unlicensed band is also studied. In NR-U, there is a possibility that an LBT sub-band having a width of 20MHz is used and the frequency of interference from other systems varies depending on the frequency band, and thus, more flexible resource allocation in the frequency domain is required.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a technique for flexibly performing resource allocation in a frequency domain in a wireless communication system.

Means for solving the problems

According to the disclosed technology, there is provided a terminal having: a receiving unit that receives resource allocation information of a frequency domain; a control unit that determines a resource of a frequency domain used for uplink transmission that is interleaved in the frequency domain, based on information indicating a virtual frequency domain resource mapped to an actual frequency domain resource, the information being included in the resource allocation information; and a transmitting unit which monitors the determined frequency domain resources and transmits an uplink using the determined frequency domain resources when an idle state is detected.

Effects of the invention

According to the disclosed technology, in a wireless communication system, resource allocation in a frequency domain can be flexibly performed.

Drawings

Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention.

Fig. 2 is a timing diagram for explaining an example of resource allocation of NR-U.

Fig. 3 is a diagram showing an example of interleaved mapping.

Fig. 4 is a diagram showing an example (1) of resource allocation in the embodiment of the present invention.

Fig. 5 is a diagram showing an example (2) of resource allocation in the embodiment of the present invention.

Fig. 6 is a diagram showing an example (3) of resource allocation in the embodiment of the present invention.

Fig. 7 is a diagram showing an example (4) of resource allocation in the embodiment of the present invention.

Fig. 8 is a diagram showing an example (5) of resource allocation in the embodiment of the present invention.

Fig. 9 is a diagram showing an example (6) of resource allocation in the embodiment of the present invention.

Fig. 10 is a diagram showing an example (7) of resource allocation in the embodiment of the present invention.

Fig. 11 is a diagram showing an example (8) of resource allocation in the embodiment of the present invention.

Fig. 12 is a diagram showing an example (9) of resource allocation in the embodiment of the present invention.

Fig. 13 is a diagram showing an example (10) of resource allocation in the embodiment of the present invention.

Fig. 14 is a diagram showing an example of a functional configuration of the base station 10 according to the embodiment of the present invention.

Fig. 15 is a diagram showing an example of a functional configuration of the terminal 20 in the embodiment of the present invention.

Fig. 16 is a diagram showing an example of a hardware configuration of the base station 10 or the terminal 20 according to the embodiment of the present invention.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. The embodiments described below are merely examples, and the embodiments to which the present invention is applied are not limited to the embodiments described below.

The conventional technique can be suitably used when the wireless communication system according to the embodiment of the present invention is operated. However, the existing technology is, for example, existing LTE, but is not limited to existing LTE. Furthermore, unless otherwise indicated, the term "LTE" as used in this specification has a broad meaning including LTE-Advanced and beyond (e.g., NR).

In the embodiments of the present invention described below, terms such as SS (Synchronization signal), pss (primary SS), SSs (secondary SS), PBCH (Physical broadcast channel), PRACH (Physical random access channel), and the like, which are used in the conventional LTE, are used. For convenience of explanation, signals, functions, and the like similar to those described above may be referred to by other names. Further, the above-mentioned term in NR corresponds to NR-SS, NR-PSS, NR-SSS, NR-PBCH, NR-PRACH, etc. However, even a signal used for NR is not necessarily expressed as "NR-".

In the embodiment of the present invention, the Duplex (Duplex) mode may be a TDD (Time Division Duplex) mode, an FDD (Frequency Division Duplex) mode, or other modes (for example, a Flexible Duplex (Flexible Duplex) mode).

In the embodiment of the present invention, the "configuration" radio parameter or the like may be a predetermined value (Pre-configuration), or may be a radio parameter notified from the base station 10 or the terminal 20.

Fig. 1 is a diagram for explaining a wireless communication system according to an embodiment of the present invention. As shown in fig. 1, the wireless communication system in the embodiment of the present invention includes a base station 10A, a base station 10B, and a terminal 20. Fig. 1 shows one base station 10A, one base station 10B, and one terminal 20, respectively, but these are merely examples and may be plural. Hereinafter, the base station 10A and the base station 10B are referred to as the base station 10 without distinction.

The base station 10 is a communication device that provides one or more cells and performs wireless communication with the terminal 20. The physical resources of a wireless signal are defined by the time domain, which may be defined by the number of OFDM symbols, and the frequency domain, which may be defined by the number of subcarriers or the number of resource blocks. The base station 10 transmits a synchronization signal and system information to the terminal 20. The synchronization signals are for example NR-PSS and NR-SSS. The system information is transmitted, for example, over the NR-PBCH, also referred to as broadcast information. As shown in fig. 1, the base station 10 transmits a control signal or data to the terminal 20 through DL (Downlink) and receives a control signal or data from the terminal 20 through UL (Uplink). Both the base station 10 and the terminal 20 can perform beamforming to transmit and receive signals.

The terminal 20 is a communication device having a wireless communication function, such as a smartphone, a mobile phone, a tablet computer, a wearable terminal, and a communication module for M2M (Machine-to-Machine). As shown in fig. 1, the terminal 20 receives a control signal or data from the base station 10 through DL and transmits the control signal or data to the base station 10 through UL, thereby utilizing various communication services provided by the wireless communication system.

The base station 10A shown in fig. 1 is an NR base station, and the base station 10B is an NR-U base station. That is, the base station 10A communicates with the terminal 20 using the licensed frequency band, and the base station 10B communicates with the terminal 20 using the unlicensed frequency band.

In NR, a case where not only a frequency band (licensed band) licensed by a communication carrier but also a frequency band (unlicensed band) different from the licensed band (for example, a 2.4GHz band or a 5GHz band) is used has been studied. The NR system using the Unlicensed band may also be referred to as NR-U (NR-Ullicensed), NR-LAA (NR License-acquired Access), NR-U system, or the like. In the unlicensed band, it is assumed that not only the NR-U system but also a plurality of systems such as another LAA system and a WLAN (Wireless Local Area Network) system coexist, and therefore at least one of interference control and collision control is performed between the plurality of systems.

A transmitting node in the NR-U system performs listening (listening) to confirm whether or not transmission from another node (e.g., a base station, a user terminal, a WLAN device, etc.) is present before transmitting a signal (e.g., a data signal) in an unlicensed band. In addition, the listening may also be referred to as LBT (Listen Before Talk), CCA (Clear Channel Assessment), Carrier sense (Carrier sense), or Channel access action (Channel access procedure), etc.

The transmitting node may be, for example, a base station (e.g., a gnb (gnnodeb), a transmission/reception point (TRP)), or a Network (NW)) in a Downlink (DL) and may be a terminal 20 (e.g., a User Equipment (UE)) in an Uplink (UL). Further, for a receiving node that receives a signal from a transmitting node, for example, it may be the terminal 20 in DL and the base station 10 in UL.

The transmitting node starts transmission after a predetermined period (for example, immediately after or during a back-off period) has elapsed since the transmission (idle) in which no other device is detected to be present during the listening, and does not transmit a signal when the transmission (busy, LBT-busy) in which the other device is present is detected during the listening.

On the other hand, when the transmitting node detects that there is no Transmission (idle, LBT-idle) from another node during the listening, the transmitting node obtains a Transmission Opportunity (TxOP) and a Channel Occupancy (Channel Occupancy), and starts Transmission of a signal. The Time of this transmission opportunity is called COT (Channel Occupancy Time: Channel Occupancy Time).

The COT is a total length of time of all transmissions in a transmission opportunity and a gap in a predetermined time, and may be equal to or less than a Maximum COT (MCOT). The MCOT may be decided according to a channel access priority class. The channel access priority class may be associated with a contention window (contention window) size.

The above NR-U system can be used in Carrier Aggregation (CA) or Dual Connectivity (DC) of Component Carriers (CCs)) of an unlicensed band and CCs (licensed CCs) of a licensed band, and can also be used in stand-alone (SA) of the unlicensed CCs.

In addition, the unlicensed CC may be replaced with an unlicensed band, an unlicensed spectrum, a Secondary Cell (SCell), a Licensed Assisted Access (LAA) SCell, an LAA Cell, a Primary Cell (PCell), a Primary and Secondary Cell (PSCell), a Special Cell (SPCell), a sensed frequency of an application channel, an NR-U object frequency, or the like.

Further, the licensed CCs may be replaced with licensed bands, licensed spectrum, PCell, PSCell, SPCell, SCell, non-NR-U object frequencies, rel.15, NR, sensed frequencies of an unapplied channel, or NR object frequencies, etc.

Fig. 2 is a timing diagram for explaining an example of resource allocation of NR-U. In step S1 shown in fig. 2, the NR base station 10A transmits information indicating the resource allocation of the NR-U to the terminal 20. The information indicating the resource allocation of NR-U includes at least information indicating resource allocation of a frequency domain. In step S2, the terminal 20 communicates with the NR-U base station 10B using the allocated NR-U resource.

In addition, in step S1 shown in fig. 2, not only information indicating the resource allocation of NR-U may be transmitted by NR base station 10A to terminal 20, but also information indicating the resource allocation of NR-U may be transmitted by NR-U base station 10B to terminal 20. In NR-U, a stand-alone (standby) use case for resource allocation in an unlicensed band is also envisaged.

In NR, the UL Resource allocation method employs type 0(type0) specifying RBGs (Resource Block Groups: Resource Block Groups) allocated according to a bitmap, and type 1(type1) specifying the starting RBs and the number of RBs. On the other hand, in NR-U, for the UL resource allocation method, interlace mapping (interlace mapping) of the frequency domain is used. Therefore, the NR UL resource allocation method cannot be directly used for NR-U resource allocation.

Wherein predetermined restrictions need to be satisfied in order to utilize the unlicensed CC. For example, according to the rule (regulation) of the European Telecommunication Standardization Institute (ETSI), with respect to utilization of 5GHz, which is one of unlicensed carriers, an Occupied Channel Bandwidth (OCB) containing 99% of power of a signal must be a Bandwidth of 80% or more of a usable Bandwidth (e.g., a system Bandwidth). Furthermore, a limit is also specified in relation to the maximum transmit Power Density (Power Spectral Density: Power Spectral Density (PSD)) per predetermined bandwidth (1 MHz).

In order to satisfy such a restriction (for example, the rule of the OCB), in the unlicensed CC, transmission (interlace-type transmission) using a set of a plurality of frequency domain resources (also referred to as an RB set, interlace, or the like) at predetermined intervals is studied.

The Interleaved transmission may be referred to as multi-cluster transmission in units of a predetermined Frequency domain resource, Block Interleaved Frequency Division Multiple Access (Block Interleaved Frequency Division Multiple Access), or the like. One interlace (interlace) may be defined as a set of a plurality of frequency domain resources allocated in a predetermined frequency interval (e.g., 10RB interval).

Each frequency domain resource dispersed in the frequency direction included in one interlace may be referred to as a cluster (cluster), respectively. One cluster may be composed of more than one contiguous RB, subcarrier, resource block group, etc. In addition, the hopping within the cluster may not be applied, and may be applied.

Fig. 3 is a diagram showing an example of interlace mapping. For example, in fig. 3, the entire bandwidth (e.g., system bandwidth) that can be used is 20MHz (e.g., 100RB), and the interlace # i is composed of 10 RBs (cluster) with index values of { i, i +10, i + 20...., i +90 }.

As shown in fig. 3, in the case where the entire bandwidth that can be used is constituted by 20MHz, 10 interlaces #0 to #9 are provided. One or more interlaces may be allocated to a certain terminal 20 as a frequency domain resource for an uplink signal.

The above example shown in fig. 3 is a case where the subcarrier spacing is set to 15 kHz. In the NR-U, a case where the subcarrier spacing is applied to 30kHz is also conceivable. When the subcarrier spacing is set to 30kHz, the LBT subband 20MHz is 50RB, and the interleaving is composed of 5RB (clusters). The interleaving set is 5 pieces of #0 to # 4.

In NR-U, it is assumed that a bandwidth of 20MHz or more (for example, a variable band of an integer multiple of 20MHz) can be used according to the idle condition. Bandwidths above 20MHz relate to broadband carriers, broadband, LAAs cells, LAA cells, NR-U carriers, NR-U cells, etc. In a wide-band carrier, monitoring is also studied in terms of each partial band (e.g., 20MHz) within the carrier, rather than in terms of the carrier as a whole. The partial band may be referred to as a predetermined band, a sub-band (sub-band), an LBT sub-band, a listening band, or the like.

When the interlace transmission is performed in the above-described bandwidth of 20MHz or more, how to control the allocation of frequency domain resources to an Uplink Shared Channel (e.g., a PUSCH (Physical Uplink Shared Channel)) or a Downlink Shared Channel (e.g., a PDSCH (Physical Downlink Shared Channel)) becomes a problem.

For example, in the NR version (release)15, the above-described type1 (also referred to as uplink resource allocation type0 (0) and type0) and type2 (also referred to as uplink resource allocation type1 (1) and type1) are assumed as the allocation method of frequency domain resources for PUSCH.

In type0, the frequency domain resources allocated to the PUSCH are shown using a bitmap in units of RBGs composed of a plurality of consecutive RBs. For example, when the number of RBGs reaches # n, bits corresponding to RBGs #0, #1, and #3 in the n-bit bitmap may be turned on (on), and RBGs #0, #1, and #3 may be allocated to the PUSCH of terminal 20. In addition, the number of RBs constituting a 1RBG may be 4, but is not limited thereto. In type0, discontinuous frequency domain resources may be allocated to PUSCH, but the unit of allocation is RBG.

On the other hand, in type1, a starting Resource Block (RB) is used_START) And the number of consecutively allocated (contiguouslly) resource blocks(Length, L)_RBs) To show the frequency domain resources allocated to the PUSCH. For example, for the slave RB_STARTRB #3 to L shown_RBsThe 7 consecutive RBs shown allocate the PUSCH for the terminal 20. In type1, frequency domain resources can be allocated to the PUSCH in units of RBs, but is not limited to consecutive RBs.

As described above, the frequency domain resource allocation method for PUSCH in NR release 15 does not assume interlace transmission. Therefore, when the interlace-type transmission is applied to the PUSCH, there is a possibility that the frequency domain resource for the PUSCH cannot be appropriately allocated.

In particular, in NR-U in which interleaved PUSCH transmission is assumed in a bandwidth of 20MHz or more, the frequency of interference from another unknown system may vary depending on the frequency band. Therefore, it is desirable to allocate frequency domain resources more flexibly and efficiently for a PUSCH to which interlace-type transmission is applied. In addition, the same problem may occur in the allocation of frequency domain resources to the PDSCH to which the interlace type transmission is applied.

In this way, the appropriate allocation of frequency domain resources to the PUSCH or PDSCH to which the interlace type transmission is applied is studied. Specifically, the terminal 20 receives information (resource allocation information) used for determining a set of RBs at predetermined intervals in a predetermined band within a carrier, and determines the set determined based on the information as a frequency domain resource allocated to the PUSCH or PDSCH. The terminal 20 defines a Virtual frequency resource (Virtual frequency resource) and maps the Virtual frequency resource to an actual frequency resource (Real frequency resource), thereby determining a frequency resource to be allocated to the PUSCH or PDSCH.

In the following, determination of frequency domain resources allocated to a PUSCH scheduled by Downlink Control Information (DCI) is described, but the determination is not limited thereto. The present embodiment can also be applied to PUSCH transmission using a configuration grant (configured grant).

Further, the following contemplates an interleaved transmission of PUSCH on an unlicensed carrier, but is not limited thereto. The present embodiment can also be applied to PUSCH interleaving transmission in a licensed carrier.

Hereinafter, a set of RBs (also referred to as an RB set, an interlace, or the like) at a predetermined interval in a predetermined band within a carrier is allocated to the PUSCH, but the present invention is not limited thereto. The carrier may be replaced with a bandwidth part (bwp (bandwidth part)) within the carrier.

The resource allocation information may include a starting resource block RB indicating each RB set_STARTAnd from the beginning of the resource block RB_STARTNumber of consecutive resource blocks L_RBsFor example, each resource Indication value (riv) (resource Indication value)).

The terminal 20 receives the RB indicating the starting resource block_STARTAnd the number of resource blocks L_RBsAnd determines each RB set determined according to the information as a frequency domain resource allocated to the PUSCH.

Indicates the starting resource block RB_STARTAnd the number of resource blocks L_RBsThe information (e.g., more than one RIV) of (a) may be represented by a predetermined field value (e.g., a value of an frequency Domain Resource allocation (fdra) field) within the DCI (e.g., DCI format 0_0 or 0_ 1).

The terminal 20 may start the resource block RB from each_STARTNumber of resource blocks L_RBsWill start the resource block RB from each_STARTAn RB set consisting of RBs at predetermined intervals is determined as a frequency domain resource allocated to the PUSCH. The predetermined interval may be predetermined by a specification, or may be set (notified) to the terminal 20 by higher layer signaling.

In the present disclosure, the higher layer signaling may be at least one of Information (also referred to as Broadcast Information, master Information block (mib), etc.) transmitted via a Broadcast Channel (Physical Broadcast Channel), system Information (also referred to as system Information block (sib), etc.), RRC (Radio Resource Control) signaling (also referred to as RRC parameter, RRC Information element (ie), (Information element), etc.), MAC (Medium Access Control) signaling (also referred to as MAC Control element (ce), etc.).

Fig. 4 is a diagram showing an example (1) of resource allocation in the embodiment of the present invention. Fig. 4 is a diagram illustrating an example of allocation of an interlace frequency domain resource. In fig. 4, the terminal 20 receives a starting resource block RB indicating a single set of RBs allocated to the PUSCH_START1And from this starting resource block RB_START1Number of consecutive resource blocks L_RBs1For example, RIV. The information may be, for example, a predetermined field value (e.g., FRDA field value) within the DCI.

The terminal 20 is starting the resource block RB from above_START1Number of consecutive resource blocks L_RBs1Will start the resource block RB_START1An RB set consisting of RBs at predetermined intervals (predetermined number of RBs) is determined as a frequency domain resource allocated to the PUSCH. The predetermined interval may be predetermined by a specification or may be notified to the terminal 20 through higher layer signaling.

In fig. 4, a single RIV indicates a starting resource block RB of a single set of RBs_START1And from this starting resource block RB_START1Number of consecutive resource blocks L_RBs1Therefore, a single RB set can be allocated to the PUSCH subjected to the interlace-type transmission using a predetermined field value (e.g., FDRA field value) within the existing DCI format (e.g., DCI format 0_0 or 0_ 1). The inter-interlace interval (interval) may be defined by a specification or may be set semi-statically by RRC signaling or the like.

Fig. 5 is a diagram showing an example (2) of resource allocation in the embodiment of the present invention. Fig. 5 shows an example of a plurality of RB sets in a band where PUSCH allocation is continuous.

In fig. 5, the terminal 20 may receive a starting resource block RB indicating a "1 st set of RBs_START1And from the beginning of the resource block RB_START1Number of consecutive resource blocks L_RBs1"and information (for example, 1 st RIV) indicating" starting resource block RB of 2 nd RB set_START2And from the beginning of the resource block RB_START2Number of consecutive resource blocks L_RBs2"of (e.g., 2 nd RIV). The information may be represented by a predetermined field value (e.g., FRDA field value) within the DCI, for example.

The terminal 20 may set "starting the resource block RB from above_START1Number of consecutive resource blocks L_RBs1From the beginning of the resource block RB in the 1 st band _START11 st RB set starting from RBs at predetermined intervals (predetermined number of RBs), and "starting from the above starting resource Block RB_START2Number of consecutive resource blocks L_RBs2In the 2 nd band from the above starting resource block RB_START2Number of consecutive resource blocks L_RBs2From the beginning of the resource block RB in a predetermined band_START2The 2 nd RB set of RBs "at predetermined intervals (predetermined number of RBs) is determined as a frequency domain resource allocated to the PUSCH.

As shown in FIG. 5, the RB is started from a plurality of starting resource blocks_STARTRespectively consists of corresponding resource block number L_RBsThe formation of the plurality of bands may be at least partially repeated. For example, in fig. 5, the 1 st band including the 1 st RB set includes the 2 nd band including the 2 nd RB set. That is, the plurality of bands may be continuous in the frequency domain.

Fig. 6 is a diagram showing an example (3) of resource allocation in the embodiment of the present invention. Fig. 6 shows an example of a plurality of RB sets for each of a plurality of discontinuous bands allocated to the PUSCH.

As shown in FIG. 6, the RB is started from a plurality of starting resource blocks_STARTRespectively consists of corresponding resource block number L_RBsThe plurality of bands formed may be discontinuous. For example, in fig. 6, the 1 st band including the 1 st RB set is discontinuous in the frequency domain from the 2 nd band including the 2 nd RB set.

In fig. 5 and 6, a plurality of RIVs respectively indicate starting resource blocks RB of a plurality of RB sets_STARTAnd from this starting resource block RB_STARTNumber of consecutive resource blocks L_RBsTherefore, by minimizing (adding only a change specifying a plurality of RIVs) an extension to a predetermined field value (for example, FDRA field value) in an existing DCI format (for example, DCI format 0_0 or 0_1), a plurality of RB sets in a continuous band or a plurality of discontinuous bands can be allocated to a PUSCH subjected to interlace-type transmission.

Illustrated in fig. 4, 5 and 6The resource allocation information includes starting Resource Blocks (RBs) indicating respective RB sets_STARTAnd from the beginning of the resource block RB_STARTNumber of consecutive resource blocks L_RBsBecause of the information (e.g., RIVs), frequency domain resources can be appropriately allocated to the PUSCH subjected to the interlace-type transmission.

Fig. 7 is a diagram showing an example (4) of resource allocation in the embodiment of the present invention. The resource allocation information may comprise starting resource blocks RB indicating more than one band within the carrier_STARTAnd the number L of resource blocks in the predetermined band_RBsAnd a number (RB set number, interlace number) N indicating one or more RB sets in the one or more bands_INTThe information of (1).

The terminal 20 receives the indication of each starting resource block RB_STARTAnd the number of resource blocks L_RBsAnd indicates one or more interlace numbers N_INTAnd determines one or more RB sets in each band determined based on the information as frequency domain resources allocated to the PUSCH.

Indicates the starting resource block RB_STARTAnd the number of resource blocks L_RBsMay be represented by a predetermined field value (e.g., FDRA field value) within DCI (e.g., DCI format 0_0 or 0_ 1). Indicates more than one interlace number N_INTMay be indicated by the predetermined field value (e.g., FDRA field value) within the DCI, or may be indicated by other field values.

The terminal 20 may start each RB_STARTAnd the number of resource blocks L_RBsWithin each determined band, the above-mentioned one or more interleaving numbers N are used_INTThe determined one or more RB sets are determined as frequency domain resources allocated to the PUSCH.

The association (correlation) between each RB and an interlace number (RB set number, interlace, or RB set) in each band may be determined in advance by a specification or set to the terminal 20 by higher layer signaling.

FIG. 7 is a diagram illustrating the division of interleaved frequency domain resources in the continuous band according to embodiment 2A diagram of an example of a configuration. In fig. 7, the terminal 20 receives a starting resource block RB indicating "a predetermined band within a carrier_START1And from this starting resource block RB_START1The number of consecutive resource blocks (i.e., the number of resource blocks of the predetermined band) L_RBs1"information (for example, RIV), and an interlace number N_INTThe information of (1).

Represents RB_START1And L_RBs1May be represented by a predetermined field value (e.g., FRDA field value) within the DCI, for example. Indicates the interleave number N_INTThe information (c) may be represented by the predetermined field value in the DCI, or may be represented by another field value.

In FIG. 7, for example, the slave RB is shown_START1L of_RB1In the example of arranging interlaces #0 to #4 at predetermined intervals in a band constituted by resource blocks, the number of interlaces and the like are not limited to those shown in fig. 7.

The association between each RB and an interlace number (interlace or RB set) may be predetermined by specification or may be set by RRC signaling. For example, in FIG. 7, the slave RB in the band is selected from the above-mentioned sub-RB_START1An RB set including RBs at predetermined intervals (here, 5RB intervals) from + i forms an interlace # i (here, i ═ 0 to 4). The association between each RB and an interlace number (interlace) is not limited to the case shown in the figure.

The terminal 20 may be starting a resource block RB_START1And the number of resource blocks L_RBs1Within the determined band, the number N of interleaving is determined_INT1(in FIG. 5, N_INT11) the determined RB set (interlace #1) is decided as a frequency domain resource allocated to the PUSCH.

In fig. 7, a starting resource block RB of a predetermined band within a carrier is shown_STARTAnd the number L of resource blocks of the predetermined band_RBsRIV and interleaving number N_INTBeing notified to the terminal 20, it is possible to reduce the extension (for example, indicating the interlace number N) to the existing DCI format (for example, DCI format 0_0 or 0_1)_INT) And one or more RB sets are allocated to the PUSCH subjected to the interleaved transmission.

In addition, in FIG. 7A single RB set (interlace) in the predetermined band is allocated to the terminal 20, but a plurality of RB sets (interlaces) may be allocated to the terminal 20. In this case, the terminal 20 receives a signal indicating a plurality of interlace numbers N_INTThe information of (2) is sufficient.

Fig. 8 is a diagram showing an example (5) of resource allocation in the embodiment of the present invention. The resource allocation information may comprise a starting resource block RB indicating a plurality of bands of discontinuity within the carrier_STARTAnd the number L of resource blocks in the predetermined band_RBsAnd a number (RB set number, interlace number) N indicating one or more RB sets common or dedicated to the plurality of bands_INTThe information of (1).

Fig. 8 is a diagram illustrating an example of allocation of interlace-type frequency domain resources in a discontinuous band. In fig. 8, the UE receives starting resource blocks RB indicating discontinuous 1 st and 2 nd bands within the carrier_START1And RB_START2And RB from the starting resource block_START1And RB_STAR2The number of resource blocks (i.e., the number of resource blocks of the predetermined band) L that are respectively continuous_RBs1And L_RBs2And an interleaving number N indicating that the 1 st and 2 nd bands are common (e.g., 1 st and 2 nd RIVs)_INTThe information of (1).

Represents RB_START1And L_RBs1Information (e.g., 1 st RIV) and representation RB_START2And L_RBs2May be represented by a predetermined field value (e.g., FRDA field value) within the DCI, for example. Indicates an interlace number N common to the 1 st and 2 nd bands_INTThe information (c) may be represented by the predetermined field value in the DCI, or may be represented by another field value.

In fig. 8, similarly to fig. 7, each RB in the 1 st and 2 nd bands is associated with an interlace number (interlace or RB set). Hereinafter, the differences from fig. 7 will be mainly described.

The terminal 20 may be starting a resource block RB_START1And the number of resource blocks L_RBs1Decided 1 st band and starting resource block RB_START2And the number of resource blocks L_RBs2To make a decisionIn both 2 bands, the number N is determined by the interleaving number_INT1(in FIG. 8, is N)_INT10) is determined as a frequency domain resource allocated to the PUSCH.

In fig. 8, the interlace number N is commonly assigned in a plurality of bands which are not continuous within a carrier_INTTherefore, it is possible to reduce the extension to the existing DCI format (e.g., DCI format 0_0 or 0_1) (e.g., so that a plurality of RIVs and the interlace number N are shown_INT) And one or more RB sets are allocated to the PUSCH subjected to the interleaved transmission.

Fig. 9 is a diagram showing an example (6) of resource allocation in the embodiment of the present invention. Fig. 9 is a diagram illustrating another example of allocation of interleaved frequency domain resources in the discontinuous band. The difference from fig. 8 is that, in fig. 9, the UE receives an interlace number N indicating that the 1 st and 2 nd bands are dedicated to_INT1And N_INT2In place of the interleaving number N common to the 1 st and 2 nd bands of fig. 8_INT. Hereinafter, differences from fig. 8 will be mainly described.

The terminal 20 may be starting a resource block RB_START1And number of resource blocks L_RBs1In the determined 1 st band, the number N is determined by the interleaving number_INT1(in FIG. 9, N_INT10) is determined as a frequency domain resource allocated to the PUSCH.

In addition, the terminal 20 may start the resource block RB_START2And number of resource blocks L_RBs2In the determined 2 nd band, the number N is determined by the interleaving number_INT2(in FIG. 9, N_INT21) a specific RB set (interlace #1) is determined as a frequency domain resource allocated to the PUSCH.

In fig. 9, since the interlace number N is assigned to each of a plurality of discontinuous bands within the carrier_INTThus, the extension to the existing DCI format (e.g., DCI format 0_0 or 0_1) can be reduced (e.g., such that multiple RIVs and multiple interlace numbers N are shown)_INT) At the same time, one or more RB sets are allocated to the PUSCH subjected to the interleaved transmission for each discontinuous band.

Resource allocation packets illustrated in fig. 7, 8 and 9Including starting resource block RB indicating each band used for PUSCH within a carrier_STARTAnd the number of resource blocks L of each band_RBsBecause of the information (e.g., RIVs), frequency domain resources can be appropriately allocated to the PUSCH subjected to the interlace-type transmission.

Fig. 10 is a diagram showing an example (7) of resource allocation in the embodiment of the present invention. The resource allocation information may include a number (LBT subband number) N indicating one or more LBT subbands (listening bands) within a carrier_LSBAnd a number (RB set number, interlace number) N indicating one or more RB sets within one or more LBT subbands_INTThe information of (1).

The terminal 20 may receive a signal indicating each LBT subband number N_LSBAnd indicates one or more interlace numbers N_INTAnd numbering N according to the LBT sub-band_LSBWithin the determined predetermined band, more than one interleaving number N is assigned_INTThe RB set (interleaving) of (1) is decided as a frequency domain resource allocated to the PUSCH.

Indicates each LBT sub-band number N_LSBMay be represented by a predetermined field value (e.g., FDRA field value) within DCI (e.g., DCI format 0_0 or 0_ 1). Indicates more than one interlace number N_INTMay be indicated by the predetermined field value (e.g., FDRA field value) within the DCI, or may be indicated by other field values.

The association between each RB and the interlace number in each LBT subband may be predetermined by a specification, or may be set for the terminal 20 by higher layer signaling.

Fig. 10 is a diagram illustrating an example of allocation of an interlace frequency domain resource. In fig. 8, 3 LBT subbands are provided in a carrier, but the present invention is not limited thereto, and one or more LBT subbands may be provided in a carrier.

In fig. 10, two LBT subbands #0 and #2 are designated by DCI, but the present invention is not limited thereto. The number of LBT subbands specified by DCI may be one or more. Note that, although not shown, a plurality of continuous LBT sub-bands may be designated as well, a plurality of discontinuous LBT sub-bands shown in fig. 10 may be designated.

In fig. 10, interlaces of interlace numbers #0 to #4 are formed by sets of RBs at predetermined intervals (6RB intervals) in each LBT subband, but the number of interlaces, the association between an interlace number and an RB, and the like are not limited to those shown in the figure.

The terminal 20 may be numbered by the LBT sub-band N_LSBIn the determined LBT sub-band #0, the interleaving number N is set_INT1(in FIG. 10, N_INT12) the determined RB set (interlace #2) is decided as a frequency domain resource allocated to the PUSCH.

In addition, the terminal 20 may be numbered by the LBT sub-band N_LSBIn the determined LBT sub-band #2, the interleaving number N is set_INT2(in FIG. 10, N_INT21) the determined RB set (interlace #1) is decided as a frequency domain resource allocated to the PUSCH.

As shown in fig. 10, since the LBT subband number and the interleaving number N are specified_INTTherefore, one or more RB sets can be flexibly allocated to the PUSCH subjected to the interlace-type transmission with a small amount of information.

Fig. 11 is a diagram showing an example (8) of resource allocation in the embodiment of the present invention. The LBT sub-band includes a number (also referred to as a partial band number, a sub-band number, or the like) N indicating one or more partial bands (sub-bands) within the LBT sub-band_SBAnd a number (RB set number, interlace number) N indicating one or more RB sets in each subband_INTThe information of (1).

The terminal 20 may receive a symbol indicating more than one subband number N_SBAnd indicates one or more interlace numbers N_INTAnd is numbered according to the subband_SBWithin the determined predetermined band, more than one interleaving number N is assigned_INTThe RB set (interleaving) of (1) is decided as a frequency domain resource allocated to the PUSCH.

Indicates each sub-band number N_SBMay be represented by a predetermined field value (e.g., FDRA field value) within DCI (e.g., DCI format 0_0 or 0_ 1). Indicates more than one interlace number N_INTMay pass the predetermined field value (e.g., an instance) within the DCIE.g., FDRA field value), or may be represented by other field values.

The association between each RB and an interlace number in each subband may be predetermined by a specification or may be set in terminal 20 by higher layer signaling.

Fig. 11 is a diagram illustrating an example of allocation of an interlace frequency domain resource. In fig. 11, one LBT sub-band is provided in a carrier, and 3 sub-bands are provided in the one LBT sub-band, but it is not limited thereto, and one or more sub-bands may be provided in the LBT sub-band. In addition, in fig. 11, a bandwidth (N) of a carrier (or BWP within a carrier) is illustrated^UL_BWP _RB) The case consisting of 1LBT sub-band, but not limited thereto, the bandwidth (N)^UL_BWP _RB) The LBT sub-band may include one or more LBT sub-bands (n is a positive integer)).

In fig. 11, two subbands #0 and #2 within the LBT subband are designated by DCI, but the present invention is not limited thereto. The number of subbands specified by DCI may be one or more. As shown in fig. 11, a plurality of discontinuous sub-bands may be designated, and although not shown, a plurality of continuous sub-bands may be designated.

In fig. 11, interlaces of interlace numbers #0 to #4 are formed by a set of RBs at predetermined intervals (6RB intervals) in each subband, but the number of interlaces, the association between an interlace number and an RB, and the like are not limited to those shown in the figure.

The terminal 20 may be numbered by sub-band N_SBIn the determined LBT sub-band #0, the interleaving number N is set_INT1(in FIG. 11, N_INT12) the determined RB set (interlace #2) is decided as a frequency domain resource allocated to the PUSCH.

In addition, the terminal 20 may be numbered by sub-band N_SBIn the determined LBT sub-band #2, the interleaving number N is set_INT2(in FIG. 11, N_INT21) the determined RB set (interlace #1) is decided as a frequency domain resource allocated to the PUSCH.

In fig. 11, since the subband number within the LBT subband and the interleave number N are specified_INTThus can be obtained byThe disclosed method flexibly allocates one or more RB sets to a PUSCH that is transmitted in an interleaved manner, with a small amount of information.

Fig. 12 is a diagram showing an example (9) of resource allocation in the embodiment of the present invention. Fig. 12 is a diagram showing an example of mapping and allocating a Virtual frequency domain resource (Virtual frequency resource) to an interleaved actual frequency domain resource (Real frequency resource). The base station 10 defines a mapping of actual frequency domain resources for NR-U to virtual frequency domain resources. The mapping may be in an interleaving priority manner, or in an LBT subband priority manner.

For example, when interlace #0, interlace #1, LBT subband #0, LBT subband #1, LBT subband #2 are located in the actual frequency domain resources and mapped with interleaving priority, the (LBT subband #, interlace #) of the actual frequency domain resources to which the virtual frequency domain resources are mapped is in the order of (0, 0) (0, 1) (1, 0) (1, 1) (2, 0) (2, 1).

For example, when interleaving #0, interleaving #1, LBT subband #0, LBT subband #1, and LBT subband #2 are located in the actual frequency domain resources and mapped so that LBT subbands are prioritized, the actual frequency domain resources (LBT subband #, interleaving #) to which the virtual frequency domain resources are mapped have the order of (0, 0) (1, 0) (2, 0) (0, 1) (1, 1) (2, 1).

The mapping between the actual frequency domain resources and the virtual frequency domain resources is interleaving priority or LBT subband priority may be default and can be set through RRC signaling or the like. The mapping between the actual frequency domain resources and the virtual frequency domain resources is not limited to the interleaving priority or LBT subband priority scheme, and any mapping may be defined. For example, as shown in fig. 12, (LBT subband #, interlace #) of the actual frequency domain resources mapped with the virtual frequency domain resources may be in the order of (0, 0) (0, 1) (1, 0) (2, 0). In addition, the actual frequency domain resources shown in fig. 12 are an example in which 5 RBs are configured per 1LBT subband in an interleaved manner.

The base station 10 specifies a starting resource block RB representing a single RB set in the virtual frequency domain resources by DCI format 1_0 or the like_STARTAnd from this starting resource block RB_STARTNumber of consecutive resource blocks L_RBsThe information of (1). That is, the base station 10 can specify resources contiguous to the virtual frequency domain resources by this information, as in type1 of the UL resource allocation method in NR.

In fig. 12, the terminal 20 receives a starting resource block RB indicating a single RB set in the virtual frequency domain resources allocated to the PUSCH_START0And from this starting resource block RB_START0Number of consecutive resource blocks L_RBs0For example, RIV. The information may be, for example, a predetermined field value (e.g., FRDA field value) within the DCI. In the example shown in fig. 12, RBs are designated on virtual frequency domain resources_START0＝1、L_RBs0With 2, (LBT subband #, interlace #) on the actual frequency domain resources is allocated in the order of (0, 1) (1, 0).

In fig. 12, the RB set can be flexibly allocated to the PUSCH subjected to the interlace-type transmission with a smaller amount of information using type1 of the UL resource allocation method in NR, that is, the conventional DCI format 1_ 0.

Fig. 13 is a diagram showing an example (10) of resource allocation in the embodiment of the present invention. Fig. 13 is a diagram illustrating an example in which virtual frequency domain resources are specified by a plurality of pieces of information in fig. 12, which are the same as type1 of the resource allocation method of UL in NR. In fig. 13, (LBT subband #, interlace #) of the actual frequency domain resources is mapped to the virtual frequency domain resources in the order of (0, 0) (0, 1) (1, 0) (2, 0) (1, 1).

In fig. 13, the terminal 20 receives a plurality of starting resource blocks RB representing a single RB set among virtual frequency domain resources allocated to the PUSCH_START0And from this starting resource block RB_START0Number of consecutive resource blocks L_RBs0For example, RIV. In the example shown in fig. 13, the (RB) is specified on the virtual frequency domain resource_START0＝1、L_RBs02) and (RB)_START1＝4、L_RBs01), the (LBT subband #, interleaving #) on the actual frequency domain resources is allocated in the order of (0, 1) (1, 0) (1, 1).

In fig. 13, the extension to the conventional DCI format 1_0 is minimized by using the conventional DCI format 1_0, which is type1 of the UL resource allocation method among a plurality of NRs, and the RB set can be flexibly allocated to the interleaved-type-transmitted PUSCH among NR-U including the discontinuous band in the virtual frequency domain resource.

The above-described embodiments of the present invention can be applied to, for example, PUSCH transmission using a configuration grant (configured grant). In addition, in the case of the configuration authorization of type1, the resource allocation information may be included in a higher layer parameter (e.g., configureGrantConfig). In case of configuration grant of type2, the resource allocation information may be included in a higher layer parameter or DCI activating the configuration grant.

The above-described embodiments of the present invention may be applied to the PDSCH. In case of being applied to the PDSCH, DCI format 0_0 or 0_1 may be replaced with DCI format 1_0 or 1_ 1. Further, the transmission of the PUSCH may be replaced with the reception of the PDSCH. In addition, the present invention can also be applied to a PDSCH to which semi-persistent scheduling is applied. In this case, the resource allocation information may be included in a higher layer parameter or DCI activating a configuration grant.

With the above-described embodiment, the base station 10 can flexibly allocate an RB set to the terminal 20 with a smaller amount of information for the PUSCH subjected to interlace-type transmission using the type1 of the UL resource allocation method in NR, that is, the existing DCI format 1_ 0. Further, the base station 10 can use the existing DCI format 1_0, which is type1 of the UL resource allocation method among the NRs, to minimize the extension to the existing DCI format 1_0, and can flexibly allocate an RB set to the PUSCH subjected to the interleaved transmission among NR-U including the discontinuous band in the virtual frequency domain resource.

That is, in the wireless communication system, the resource allocation in the frequency domain can be flexibly performed.

(device construction)

Next, a functional configuration example of the base station 10 and the terminal 20 that execute the above-described processing and operation will be described. The base station 10 and the terminal 20 include functions to implement the above-described embodiments. However, the base station 10 and the terminal 20 may have functions of only a part of the embodiments, respectively.

< base station 10 >

Fig. 14 is a diagram showing an example of the functional configuration of the base station 10. As shown in fig. 14, the base station 10 includes a transmitter 110, a receiver 120, a setting unit 130, and a controller 140. The functional configuration shown in fig. 14 is merely an example. The names of the function division and the function unit may be arbitrary as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 110 includes a function of generating a signal to be transmitted to the terminal 20 and transmitting the signal wirelessly. The receiving unit 120 includes a function of receiving various signals transmitted from the terminal 20 and acquiring, for example, higher layer information from the received signals. Further, the transmitter 110 has a function of transmitting NR-PSS, NR-SSS, NR-PBCH, DL/UL control signal, DL data signal, and the like to the terminal 20.

The setting unit 130 stores preset setting information and various kinds of setting information transmitted to the terminal 20 in a storage device, and reads the setting information from the storage device as necessary. The content of the setting information is, for example, information on resources in the NR-U environment of the terminal 20.

As described in the embodiment, the control unit 140 performs a process of allocating the NR-U resource to the terminal 20. Further, the control unit 140 performs communication control using the NR-U resource with the terminal 20. The transmission unit 110 may include a function unit related to signal transmission in the control unit 140, and the reception unit 120 may include a function unit related to signal reception in the control unit 140.

< terminal 20 >

Fig. 15 is a diagram showing an example of the functional configuration of the terminal 20. As shown in fig. 15, the terminal 20 includes a transmission unit 210, a reception unit 220, a setting unit 230, and a control unit 240. The functional configuration shown in fig. 15 is merely an example. The names of the function division and the function unit may be arbitrary as long as the operation according to the embodiment of the present invention can be performed.

The transmission unit 210 generates a transmission signal from the transmission data and wirelessly transmits the transmission signal. The receiving unit 220 receives various signals wirelessly and acquires a higher layer signal from the received physical layer signal. The reception unit 220 has a function of receiving NR-PSS, NR-SSS, NR-PBCH, DL/UL/SL control signals, and the like transmitted from the base station 10. For example, the transmitter 210 transmits PSCCH (Physical downlink Control Channel), PSCCH (Physical downlink Shared Channel), PSDCH (Physical downlink Discovery Channel), PSBCH (Physical downlink Broadcast Channel), etc. to the other terminal 20 as D2D communication, and the receiver 120 receives PSCCH, PSDCH, PSBCH, or PSBCH, etc. from the other terminal 20.

The setting unit 230 stores various kinds of setting information received by the receiving unit 220 from the base station 10 or the terminal 20 in the storage device, and reads the information from the storage device as necessary. The setting unit 230 also stores preset setting information. The content of the setting information is, for example, information on resources in the NR-U environment of the terminal 20.

As described in the embodiment, the control unit 240 performs NR-based communication based on the NR-U resource allocation acquired from the base station 10. The transmission unit 210 may include a function unit related to signal transmission in the control unit 240, and the reception unit 220 may include a function unit related to signal reception in the control unit 240.

(hardware construction)

The block diagrams (fig. 14 and 15) used in the description of the above embodiments show blocks in units of functions. These functional blocks (components) are realized by any combination of at least one of hardware and software. The method of implementing each functional block is not particularly limited. That is, each functional block may be implemented by one device that is physically or logically combined, or may be implemented by two or more devices that are physically or logically separated and that are directly or indirectly (for example, wired or wireless) connected and implemented by these plural devices. The functional blocks may also be implemented by a combination of software and one or more of the above-described devices.

The functions include judgment, decision, judgment, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, resolution, selection, establishment, comparison, assumption, expectation, viewing, broadcasting (broadcasting), notification (notification), communication (communicating), forwarding (forwarding), configuration (configuring), reconfiguration (reconfiguring), allocation (allocating, mapping), assignment (assigning), and the like, but are not limited thereto. For example, a function block (a configuration unit) that functions transmission is referred to as a transmission unit (transmitter) or a transmitter (transmitter). In short, as described above, the method of implementation is not particularly limited.

For example, the base station 10, the terminal 20, and the like in one embodiment of the present disclosure may also function as a computer that performs processing of the wireless communication method of the present disclosure. Fig. 16 is a diagram illustrating an example of hardware configurations of the base station 10 and the terminal 20 according to an embodiment of the present disclosure. The base station 10 and the terminal 20 described above may be configured as a computer device physically including the processor 1001, the storage device 1002, the auxiliary storage device 1003, the communication device 1004, the input device 1005, the output device 1006, the bus 1007, and the like.

In the following description, the term "device" may be replaced with "circuit", "device", "unit", and the like. The hardware configuration of the base station 10 and the terminal 20 may be configured to include one or more of the devices shown in the drawings, or may be configured not to include some of the devices.

The functions in the base station 10 and the terminal 20 are realized by the following methods: when predetermined software (program) is read into hardware such as the processor 1001 and the storage device 1002, the processor 1001 performs an operation to control communication of the communication device 1004 or at least one of reading and writing of data in the storage device 1002 and the auxiliary storage device 1003.

The processor 1001 operates, for example, an operating system to control the entire computer. The processor 1001 may be 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 control unit 140, the control unit 240, and the like may be realized by the processor 1001.

Further, the processor 1001 reads out a program (program code), a software module, data, or the like from at least one of the auxiliary storage device 1003 and the communication device 1004 to the storage device 1002, and executes various processes in accordance therewith. As the program, a program that causes a computer to execute at least a part of the operations described in the above-described embodiments is used. For example, the control unit 140 of the base station 10 shown in fig. 14 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. For example, the control unit 240 of the terminal 20 shown in fig. 15 may be realized by a control program stored in the storage device 1002 and operated by the processor 1001. While the various processes described above have been described as being executed by one processor 1001, the various processes described above may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may also be mounted by more than one chip. In addition, the program may also be transmitted from the network via a telecommunication line.

The storage device 1002 is a computer-readable recording medium, and may be configured by at least one of a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), a RAM (Random Access Memory), and the like. The storage 1002 may also be referred to as a register, cache, main memory (primary storage), or the like. The storage device 1002 can store a program (program code), a software module, and the like that can be executed to implement the communication method according to one embodiment of the present disclosure.

The auxiliary storage device 1003 is a computer-readable recording medium, and may be constituted by at least one of an optical disk such as a CD-rom (compact Disc rom), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact Disc, a digital versatile Disc, a Blu-ray (registered trademark) Disc, a smart card, a flash memory (for example, a card, a stick, a Key drive), a Floppy (registered trademark) Disc, a magnetic stripe, and the like.

The communication device 1004 is hardware (a transmitting/receiving device) for performing communication between computers via at least one of a wired network and a wireless network, and may be referred to as a network device, a network controller, a network card, a communication module, or the like. Communication apparatus 1004 may be configured to include a high-Frequency switch, a duplexer, a filter, a Frequency synthesizer, and the like, for example, in order to realize at least one of Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD). For example, a transmitting/receiving antenna, an amplifying unit, a transmitting/receiving unit, a transmission line interface, and the like may be realized by the communication device 1004. The transmitter and receiver may be physically or logically separated from each other.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a key, 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, an LED lamp, or the like) that outputs to the outside. The input device 1005 and the output device 1006 may be integrally formed (for example, a touch panel).

Further, the processor 1001 and the storage device 1002 are connected to each other via a bus 1007 for communicating information. The bus 1007 may be configured by using a single bus, or may be configured by using different buses for each device.

The base station 10 and the terminal 20 may be configured to include hardware such as a microprocessor, a Digital Signal Processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), or the like, and a part or all of the functional blocks may be implemented by the hardware. For example, the processor 1001 may also be installed using at least one of these hardware.

(summary of the embodiment)

As explained above, according to an embodiment of the present invention, there is provided a terminal having: a receiving unit that receives resource allocation information of a frequency domain; a control unit that determines a resource of a frequency domain used for uplink transmission that is interleaved in the frequency domain, based on information indicating a virtual frequency domain resource mapped to an actual frequency domain resource, the information being included in the resource allocation information; and a transmitting unit which monitors the determined frequency domain resources and transmits an uplink using the determined frequency domain resources when an idle state is detected.

With the above configuration, the base station 10 can flexibly allocate an RB set to the terminal 20 for the PUSCH of the interlace-type transmission. That is, in the wireless communication system, the resource allocation in the frequency domain can be flexibly performed.

The receiving unit may receive the resource allocation information from the 1 st base station using the 1 st frequency band, and the transmitting unit may transmit an uplink to the 2 nd base station using the determined resources of the frequency domain and using a 2 nd frequency band different from the 1 st frequency band. With this configuration, the terminal 20 can perform communication in NR-U according to NR-based resource allocation.

The control unit may acquire a start position in a virtual frequency domain and the number of resources from information indicating the virtual frequency domain resources, and may determine an index of a subband included in the 2 nd band and an index of a set of resources interleaved for each subband included in the 2 nd band, based on the start position and the number of resources. With this configuration, the terminal 20 can use the RB set of the PUSCH subjected to the interleaved transmission with a smaller amount of information using the type1 of the UL resource allocation method in NR, that is, the conventional DCI format 1_ 0.

The control unit preferentially determines an actual frequency domain in a virtual frequency domain by either an index of the subband or an index of the set of resources. With this configuration, the terminal 20 can efficiently specify the actual frequency domain from the virtual frequency domain based on a predetermined mapping.

The control unit may acquire the starting position and the number of resources in a plurality of virtual frequency domains from the information indicating the virtual frequency domain resources. With this configuration, the terminal 20 can use the existing DCI format 1_0, which is type1 of the UL resource allocation method among the NRs, to minimize the extension to the existing DCI format 1_0, and use the RB set of the PUSCH transmitted by the interlace type in NR-U including the discontinuous band in the virtual frequency domain resources.

Further, according to an embodiment of the present invention, there is provided a communication method performed by a terminal, the communication method including the steps of: a receiving step of receiving the resource allocation information of the frequency domain; a control step of determining a resource of a frequency domain used for uplink transmission that is interleaved and arranged in the frequency domain, based on information indicating a virtual frequency domain resource mapped to an actual frequency domain resource included in the resource allocation information; and a transmitting step of monitoring the determined resources of the frequency domain and transmitting an uplink using the determined resources of the frequency domain when idle is detected.

With the above configuration, the base station 10 can flexibly allocate an RB set to the terminal 20 for the PUSCH of the interlace-type transmission. That is, in the wireless communication system, the resource allocation in the frequency domain can be flexibly performed.

(supplement to embodiment)

While the embodiments of the present invention have been described above, the disclosed invention is not limited to such embodiments, and various modifications, alternatives, and substitutions will be apparent to those skilled in the art. Although specific numerical examples are used to facilitate understanding of the present invention, these numerical values are merely examples and any appropriate values may be used unless otherwise specified. The distinction of items in the above description is not essential to the present invention, and items described in two or more items may be used in combination as necessary, or items described in one item may be applied to items described in other items (as long as there is no contradiction). The boundaries of the functional units or the processing units in the functional block diagrams do not necessarily correspond to the boundaries of the physical components. The operations of the plurality of functional units may be physically performed by one component, or the operations of one functional unit may be physically performed by a plurality of components. As for the processing procedure described in the embodiment, the order of processing may be changed without contradiction. For convenience of explanation of the processing, the base station 10 and the terminal 20 have been explained using functional block diagrams, but such means may also be implemented in hardware, in software, or in a combination thereof. Software that operates by a processor provided in the base station 10 according to an embodiment of the present invention and software that operates by a processor provided in the terminal 20 according to an embodiment of the present invention may be stored in a Random Access Memory (RAM), a flash memory, a Read Only Memory (ROM), an EPROM, an EEPROM, a register, a hard disk (HDD), a removable disk, a CD-ROM, a database, a server, and any other suitable storage medium, respectively.

Further, the notification of information is not limited to the form/embodiment described in the present disclosure, and may be performed using other methods. For example, the notification of the Information may be implemented by physical layer signaling (e.g., DCI (Downlink Control Information), UCI (Uplink Control Information)), higher layer signaling (e.g., RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling, broadcast Information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof).

The forms/embodiments described in the present disclosure can also be applied to LTE (Long Term Evolution), LTE-a (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G (4 generation mobile communication system: fourth generation mobile communication system), 5G (5 generation mobile communication system: fifth generation mobile communication system), FRA (Future Radio Access), NR (new Radio: new air interface), W-CDMA (registered trademark), GSM (registered trademark), CDMA 2000, UMB (Ultra Mobile Broadband: Ultra Mobile Broadband), IEEE 802.11(Wi-Fi (registered trademark)), IEEE 802.16(WiMAX (registered trademark)), IEEE 802.20, UWB (Ultra-wide band), Bluetooth (registered trademark), a system using other appropriate systems, and a next generation system extended accordingly. Furthermore, a plurality of systems (for example, a combination of 5G and at least one of LTE and LTE-a) may be combined and applied.

The order of the processes, sequences, flows, and the like in the respective forms and embodiments described in this specification may be changed without departing from the scope of the invention. For example, for the methods illustrated in this disclosure, elements of the various steps are suggested using an illustrative sequence, but are not limited to the particular sequence suggested.

In the present specification, the specific operation performed by the base station 10 may be performed by an upper node (upper node) thereof depending on the case. In a network including one or more network nodes (network nodes) having the base station 10, it is obvious that various operations to be performed for communication with the terminal 20 may be performed by at least one of the base station 10 and a network node other than the base station 10 (for example, MME, S-GW, or the like is considered, but not limited thereto). In the above, the case where there is one network node other than the base station 10 is exemplified, but the other network node may be a combination of a plurality of other network nodes (e.g., MME and S-GW).

Information, signals, and the like described in the present disclosure can be output from a higher layer (or a lower layer) to a lower layer (or a higher layer). Or may be input or output via a plurality of network nodes.

The input or output information and the like may be stored in a specific location (for example, a memory) or may be managed using a management table. The input or output information and the like may be rewritten, updated, or appended. The output information and the like may also be deleted. The inputted information and the like may also be transmitted to other apparatuses.

The determination in the present disclosure may be made by a value (0 or 1) represented by 1 bit, may be made by a Boolean value (Boolean: true or false), and may be made by comparison of values (for example, comparison with a predetermined value).

Software, whether referred to as software, firmware, middleware, microcode, hardware description languages, or by other names, should be construed broadly to mean commands, command sets, code segments, program code, programs (routines), subroutines, software modules, applications, software packages, routines, subroutines (subroutines), objects, executables, threads of execution, procedures, functions, and the like.

Further, software, commands, information, and the like may be transmitted and received via a transmission medium. For example, where software is transmitted from a web page, server, or other remote source using at least one of wired technology (coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.), at least one of these is included within the definition of transmission medium.

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

Further, terms described in the present disclosure and terms necessary for understanding the present disclosure may be replaced with terms having the same or similar meanings. For example, at least one of the channel and the symbol may be a signal (signaling). Further, the signal may also be a message. In addition, a Component Carrier (CC) may be referred to as a Carrier frequency, a cell, a frequency Carrier, and the like.

The terms "system" and "network" and the like as used in this disclosure may be used interchangeably.

Further, information, parameters, and the like described in the present disclosure may be expressed using absolute values, may be expressed using relative values to predetermined values, and may be expressed using other corresponding information. For example, the radio resource may also be indicated by an index.

The names used for the above parameters are in no way limiting. Further, the numerical expressions and the like using these parameters may be different from those explicitly shown in the present disclosure. Various channels (e.g., PUCCH, PDCCH, etc.) and information elements may be identified by appropriate names, and thus the various names assigned to these various channels and information elements are not limiting in any respect.

In the present disclosure, terms such as "Base Station (BS)", "wireless Base Station", "Base Station apparatus", "fixed Station (fixed Station)", "NodeB", "enodeb (enb)", "gbnodeb (gnb)", "access point (access point)", "transmission point)", "reception point (reception point)", "reception point (transmission/reception point)", "cell", "sector", "cell group", "carrier", "component carrier" may be used interchangeably. A base station may also be referred to as a macrocell, a smallcell, a femtocell, a picocell, or the like.

A base station can accommodate one or more (e.g., 3) cells. When a base station accommodates a plurality of cells, the entire coverage area of the base station can be divided into a plurality of smaller areas, and each smaller area can also be provided with a communication service by a base station subsystem (e.g., an indoor small Radio Head (RRH) — "cell" or "sector"), which is a term indicating a part or the entire coverage area of at least one of the base station and the base station subsystem that performs a communication service within the coverage area.

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

For a mobile station, those skilled in the art will sometimes also refer to the following terms: a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless communication device, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a handset, a user agent (user agent), a mobile client, a client, or some other suitable terminology.

At least one of the base station and the mobile station may also be referred to as a transmitting apparatus, a receiving apparatus, a communication apparatus, or the like. At least one of the base station and the mobile station may be a device mounted on a mobile body, the mobile body itself, or the like. The moving body may be a vehicle (e.g., an automobile, an airplane, etc.), may be a moving body that moves in an unmanned manner (e.g., an unmanned aerial vehicle, an autonomous automobile, etc.), or may be a robot (manned or unmanned). At least one of the base station and the mobile station includes a device that does not necessarily move during a communication operation. For example, at least one of the base station and the mobile station may be an IoT (Internet of Things) device such as a sensor.

In addition, the base station in the present disclosure may also be replaced with a user terminal. For example, the embodiments and embodiments of the present disclosure may be applied to a configuration in which communication between a base station and a user terminal is replaced with communication between a plurality of terminals 20 (for example, a configuration may be referred to as D2D (Device-to-Device) or V2X (Vehicle-to-all system), and in this case, the terminal 20 may have the functions of the base station 10 described above.

Likewise, the user terminal in the present disclosure may be replaced with a base station. In this case, the base station may have a configuration having the functions of the user terminal described above.

Terms such as "determining" and "determining" used in the present disclosure may include various operations. The terms "determining" and "decision" may include, for example, a case where the determination (judging), calculation (calculating), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry) (for example, a search in a table, a database, or another data structure), and confirmation (ascertaining) are regarded as being performed. The "determination" and "decision" may include a case where an event of reception (e.g., reception), transmission (e.g., transmission), input (input), output (output), and access (e.g., access to data in the memory) is regarded as an event of "determination" and "decision". The "judgment" and "decision" may include matters regarding the solution (resolving), selection (selecting), selection (breathing), establishment (evaluating), comparison (comparing), and the like as the "judgment" and "decision". That is, the terms "determining" and "deciding" may include any action. The "judgment (decision)" may be replaced with "assumption", "expectation", "consideration".

The terms "connected" and "coupled" or any variant of these terms are intended to mean that two or more elements are directly or indirectly connected or coupled to each other, and may include one or more intermediate elements between two elements that are "connected" or "coupled" to each other. The combination or connection between the elements may be physical, logical, or a combination of these. For example, "connect" may be replaced with "Access". As used in this disclosure, two elements may be considered to be "connected" or "joined" to each other by the use of at least one of one or more wires, cables, and printed electrical connections, and by the use of electromagnetic energy, such as electromagnetic energy having wavelengths in the radio frequency domain, the microwave region, and the optical (both visible and invisible) region, as some non-limiting and non-inclusive examples.

The reference signal may be referred to as rs (reference signal) for short, or may be referred to as Pilot (Pilot) according to the applied standard.

As used in this disclosure, a statement "according to" is not intended to mean "solely according to" unless explicitly stated otherwise. In other words, the expression "according to" means both "according to" and "at least according to".

Any reference to elements using the designations "first", "second", etc. used in this disclosure is not intended to limit the number or order of such elements. These designations are used in this disclosure as a convenient way to distinguish between two or more elements. Thus, references to first and second elements do not imply that only two elements can be assumed herein or that the first element must precede the second element in any configuration.

The "unit" in each device configuration described above may be replaced with a "section", "circuit", "device", or the like.

Where the disclosure uses the terms "including", "comprising" and variations thereof, these terms are meant to be inclusive in the same way as the term "comprising". Also, the term "or" used in the present disclosure means not exclusive or.

A radio frame may be composed of one or more frames in the time domain. One or more individual frames in the time domain may also be referred to as subframes. A subframe may also be composed of one or more slots in the time domain. The subframe may be a fixed time length (e.g., 1ms) independent of a parameter set (numerology).

The parameter set may also be a communication parameter applied to at least one of transmission and reception of a certain signal or channel. The parameter set may indicate, for example, at least one of SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, Transmission Time Interval (TTI), number of symbols per TTI, radio frame structure, specific filtering processing performed by the transceiver in the frequency domain, specific windowing processing performed by the transceiver in the Time domain, and the like.

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

A timeslot may also contain multiple mini-slots. Each mini-slot may be formed of one or more symbols in the time domain. In addition, a mini-slot may also be referred to as a sub-slot. A mini-slot may also be made up of fewer symbols than a slot. The PDSCH (or PUSCH) transmitted in a time unit larger than the mini slot may also be referred to as PDSCH (or PUSCH) mapping type a. PDSCH (or PUSCH) transmitted using mini-slots may also be referred to as PDSCH (or PUSCH) mapping type B.

The radio frame, subframe, slot, mini-slot, and symbol all represent a unit of time when a signal is transmitted. Other names respectively corresponding to radio frame, subframe, slot, mini-slot and symbol may be used.

For example, 1 subframe may be referred to as a Transmission Time Interval (TTI), a plurality of consecutive subframes may be referred to as TTIs, and 1 slot or 1 mini-slot may be referred to as a TTI. That is, at least one of the subframe and TTI may be a subframe (1ms) in the conventional LTE, may be a period shorter than 1ms (for example, 1-13 symbols), or may be a period longer than 1 ms. Note that the unit indicating TTI may be referred to as a slot, a mini slot, or the like, instead of a subframe.

Here, the TTI refers to, for example, the minimum time unit of scheduling in wireless communication. For example, in the LTE system, the base station performs scheduling for allocating radio resources (frequency bandwidth, transmission power, and the like that can be used by each terminal 20) to each terminal 20 in units of TTIs. In addition, the definition of TTI is not limited thereto.

The TTI may be a transmission time unit such as a channel-coded data packet (transport block), code block, or code word, or may be a processing unit such as scheduling or link adaptation. When a TTI is assigned, the time interval (for example, the number of symbols) to which the transport block, code word, and the like are actually mapped may be shorter than the TTI.

In addition, when a 1-slot or 1-mini-slot is referred to as a TTI, one or more TTIs (i.e., one or more slots or one or more mini-slots) may constitute a minimum time unit for scheduling. In addition, the number of slots (the number of mini-slots) constituting the minimum time unit of the schedule may be controlled.

A TTI having a time length of 1ms may be referred to as a normal TTI (TTI in LTE rel.8-12), a normal TTI, a long TTI, a normal subframe, a long subframe, a slot, etc. A TTI shorter than a normal TTI may be referred to as a shortened TTI, a short TTI, a partial TTI, a shortened subframe, a short subframe, a mini-slot, a sub-slot, a slot, etc.

Further, a long TTI (e.g., normal TTI, subframe, etc.) may be replaced with a TTI having a time length exceeding 1ms, and a short TTI (e.g., shortened TTI, etc.) may be replaced with a TTI having a TTI length less than that of the long TTI and greater than 1 ms.

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

In addition, the time domain of the RB may include one or more symbols, and may have a length of 1 slot, 1 mini-slot, 1 subframe, or 1 TTI. The 1TTI, 1 subframe, and the like may be configured by one or more resource blocks.

In addition, one or more RBs may also be referred to as Physical Resource Blocks (PRBs), Sub-Carrier groups (SCGs), Resource Element Groups (REGs), PRB pairs, RB peers, and so on.

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

The Bandwidth Part (BWP: Bandwidth Part) (which may be referred to as partial Bandwidth) may represent a subset of consecutive common rbs (common resource blocks) for a certain parameter set in a certain carrier. Here, the common RB may also be determined by an index of an RB with reference to a common reference point of the carrier. PRBs may also be defined by a certain BWP and numbered within that BWP.

The BWP may include UL BWP (UL BWP) and DL BWP (DL BWP). For the UE, one or more BWPs may also be set within 1 carrier.

At least one of the set BWPs may be active, and the UE may not assume to transmit and receive a predetermined signal/channel outside the active BWP. In addition, "cell", "carrier", and the like in the present disclosure may also be replaced with "BWP".

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

In the present disclosure, where articles are added by translation, for example, as in the english language a, an, and the, the present disclosure also includes the case where nouns following the articles are plural.

In the present disclosure, the phrase "a and B are different" may also mean "a and B are different from each other". The term "A and B are different from C" may be used. The terms "separate", "coupled", and the like may also be construed as "different" in a similar manner.

The aspects and embodiments described in the present disclosure may be used alone or in combination, or may be switched depending on execution. Note that the notification of the predetermined information is not limited to be performed explicitly (for example, notification of "X") but may be performed implicitly (for example, notification of the predetermined information is not performed).

In the present disclosure, the base station of NR is an example of the 1 st base station. The base station of NR-U is an example of the 2 nd base station.

While the present disclosure has been described in detail, it should be apparent to those skilled in the art that the present disclosure is not limited to the embodiments described in the present disclosure. The present disclosure can be implemented as modifications and alterations without departing from the spirit and scope of the present disclosure as defined by the claims. Accordingly, the disclosure is intended to be illustrative, and not limiting.

Description of reference numerals:

10 base station

110 sending part

120 receiving part

130 setting unit

140 control part

20 terminal

210 sending part

220 receiving part

230 setting unit

240 control part

1001 processor

1002 storage device

1003 auxiliary storage device

1004 communication device

1005 input device

1006 output device

Claims (6)

1. A terminal, wherein the terminal has:

a receiving unit that receives resource allocation information of a frequency domain;

a control unit that determines a resource of a frequency domain used for uplink transmission that is interleaved in the frequency domain, based on information indicating a virtual frequency domain resource mapped to an actual frequency domain resource, the information being included in the resource allocation information; and

and a transmitting unit which listens to the determined resources in the frequency domain and transmits an uplink using the determined resources in the frequency domain when an idle state is detected.

2. The terminal of claim 1, wherein,

the receiving unit receives the resource allocation information from the 1 st base station using the 1 st frequency band, and the transmitting unit transmits uplink to the 2 nd base station using the determined resources of the frequency domain and using a 2 nd frequency band different from the 1 st frequency band.

3. The terminal of claim 2, wherein,

the control unit acquires a start position in a virtual frequency domain and the number of resources from information indicating the virtual frequency domain resources, and determines an index of a subband included in the 2 nd band and an index of a set of resources arranged in an interleaved manner for each subband included in the 2 nd band, based on the start position and the number of resources.

4. The terminal of claim 3, wherein,

the control unit preferentially determines an actual frequency domain in a virtual frequency domain by either an index of the subband or an index of the set of resources.

5. The terminal of claim 3, wherein,

the control unit acquires a starting position and the number of resources in a plurality of virtual frequency domains from the information indicating the virtual frequency domain resources.

6. A communication method performed by a terminal, the communication method comprising the steps of:

a receiving step of receiving resource allocation information of a frequency domain;

a control step of determining a resource of a frequency domain used for uplink transmission that is interleaved and arranged in the frequency domain, based on information indicating a virtual frequency domain resource mapped to an actual frequency domain resource included in the resource allocation information; and

and a sending step of monitoring the determined resources of the frequency domain, and sending an uplink by using the determined resources of the frequency domain when idle is detected.

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