KR20200018011A - Method for allocating uplink transmission resource of UE in unlicensed spectrum for new radio and Apparatuses thereof - Google Patents

Abstract

The present invention relates to a method for uplink transmission of a terminal for a next generation/5G wireless access network (hereinafter referred to as new radio unlicensed spectrum [NR-U]) configured through an unlicensed band. According to an embodiment of the present invention, in a method of setting uplink transmission resources of a terminal in an unlicensed band, provided is a method for allocating frequency axis resources based on a resource block (RB) constituting one sub-band.

Description

Method and device for allocating uplink transmission resource of UE in unlicensed band for next generation wireless network

The present invention proposes a method for uplink transmission of a terminal for a next generation / 5G wireless access network (hereinafter referred to as NR-U [New Radio Unlicensed spectrum]) configured through an unlicensed band.

According to an embodiment of the present invention, in a method of configuring an uplink transmission resource of a terminal in an unlicensed band, frequency axis resource is allocated based on a resource block (RB) constituting one sub-band. Provide a method.

1 illustrates an example of symbol level alignment among different SCSs.
2 is a diagram illustrating a conceptual example of a bandwidth part.
3 is a diagram illustrating a configuration of a base station according to another embodiment.
4 is a diagram illustrating a configuration of a user terminal according to another embodiment.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used to refer to the same components as much as possible, even if displayed on different drawings. In addition, in describing the present invention, if it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In the present specification, the wireless communication system refers to a system for providing various communication services such as voice and packet data. The wireless communication system includes a user equipment (UE) and a base station (BS).

A user terminal is a comprehensive concept of a terminal in a wireless communication, and includes a user equipment (UE) in WCDMA, LTE, HSPA, and IMT-2020 (5G or New Radio), as well as a mobile station (MS) and a UT in GSM. It should be interpreted as a concept that includes a user terminal, a subscriber station (SS), and a wireless device.

A base station or cell generally refers to a station for communicating with a user terminal, and includes a Node-B, an evolved Node-B, an eNB, a gNode-B, and a Low Power Node. ), Sector, site, various types of antenna, base transceiver system (BTS), access point, access point (for example, transmission point, reception point, transmission / reception point), relay node ( It is meant to encompass various coverage areas such as relay nodes, mega cells, macro cells, micro cells, pico cells, femto cells, remote radio heads (RRHs), radio units (RUs), and small cells.

Since the various cells listed above have a base station for controlling each cell, the base station may be interpreted in two meanings. 1) the device providing the mega cell, the macro cell, the micro cell, the pico cell, the femto cell, the small cell in relation to the radio area, or 2) the radio area itself. In 1) all devices that provide a given wireless area are controlled by the same entity or interact with each other to cooperatively configure the wireless area to the base station. According to the configuration of the wireless area, a point, a transmission point, a transmission point, a reception point, and the like become one embodiment of a base station. In 2), the base station may indicate the radio area itself that receives or transmits a signal from a viewpoint of a user terminal or a neighboring base station.

In the present specification, a cell refers to a component carrier having coverage of a signal transmitted from a transmission / reception point or a signal transmitted from a transmission point or a transmission / reception point, and the transmission / reception point itself. Can be.

In the present specification, the user terminal and the base station are used in a comprehensive sense as two entities (uplink or downlink) transmitting and receiving subjects used to implement the technology or technical idea described in the present invention, and are not limited by the terms or words specifically referred to. Do not.

Here, the uplink (Uplink, UL, or uplink) refers to a method for transmitting and receiving data to the base station by the user terminal, the downlink (Downlink, DL, or downlink) means to transmit and receive data to the user terminal by the base station It means the way.

The uplink transmission and the downlink transmission may use a time division duplex (TDD) scheme that is transmitted using different times, and a frequency division duplex (FDD) scheme, a TDD scheme and a FDD scheme, which are transmitted using different frequencies. Mixed mode may be used.

In addition, in a wireless communication system, uplink and downlink are configured based on one carrier or a pair of carriers to configure a standard.

The uplink and the downlink transmit control information through a control channel such as a physical downlink control channel (PDCCH), a physical uplink control channel (PUCCH), a physical downlink shared channel (PDSCH), a physical uplink shared channel (PUSCH), and the like. It is composed of the same data channel to transmit data.

Downlink (downlink) may mean a communication or communication path from the multiple transmission and reception points to the terminal, uplink (uplink) may mean a communication or communication path from the terminal to the multiple transmission and reception points. In this case, in the downlink, the transmitter may be part of multiple transmission / reception points, and the receiver may be part of the terminal. In addition, in uplink, a transmitter may be part of a terminal, and a receiver may be part of multiple transmission / reception points.

Hereinafter, a situation in which a signal is transmitted and received through a channel such as a PUCCH, a PUSCH, a PDCCH, and a PDSCH may be described in the form of 'sending and receiving a PUCCH, a PUSCH, a PDCCH, and a PDSCH.'

Meanwhile, high layer signaling described below includes RRC signaling for transmitting RRC information including an RRC parameter.

The base station performs downlink transmission to the terminals. The base station transmits downlink control information such as scheduling required for reception of a downlink data channel, which is a main physical channel for unicast transmission, and a physical downlink for transmitting scheduling grant information for transmission on an uplink data channel. The control channel can be transmitted. Hereinafter, the transmission and reception of signals through each channel will be described in the form of transmission and reception of the corresponding channel.

There is no limitation on the multiple access scheme applied in the wireless communication system. Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Code Division Multiple Access (CDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Non-Orthogonal Multiple Access (NOMA), OFDM-TDMA, OFDM-FDMA, Various multiple access techniques such as OFDM-CDMA can be used. Here, the NOMA includes a sparse code multiple access (SCMA) and a low density spreading (LDS).

One embodiment of the present invention is for asynchronous radio communication evolving to LTE / LTE-Advanced, IMT-2020 via GSM, WCDMA, HSPA, and synchronous radio communication evolving to CDMA, CDMA-2000 and UMB. Can be applied.

In the present specification, a MTC terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement. Alternatively, in the present specification, the MTC terminal may mean a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.

In other words, in the present specification, the MTC terminal may mean a newly defined 3GPP Release-13 low cost (or low complexity) UE category / type for performing LTE-based MTC related operations. Alternatively, in the present specification, the MTC terminal supports an enhanced coverage compared to the existing LTE coverage, or UE category / type defined in the existing 3GPP Release-12 or lower, or newly defined Release-13 low cost (or supporting low power consumption). low complexity) can mean UE category / type. Or, it may mean a further Enhanced MTC terminal defined in Release-14.

In the present specification, a NB-IoT (NarrowBand Internet of Things) terminal refers to a terminal that supports radio access for cellular IoT. The objectives of the NB-IoT technology include improved indoor coverage, support for large scale low speed terminals, low sensitivity, low cost terminal cost, low power consumption, and optimized network architecture.

As a typical usage scenario in New Radio (NR), which is recently discussed in 3GPP, enhanced Mobile BroadBand (eMBB), Massive Machine Type Communication (MMTC), and Ultra Reliable and Low Latency Communication (URLLC) are being raised.

In this specification, frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals, and various messages related to NR (New Radio). May be interpreted as meaning used in the past or present, or various meanings used in the future.

Meanwhile, the following description will be given for the technical idea based on two nodes of the terminal and the base station, but this is only for convenience of understanding, and the same technical idea may be applied between the terminal and the terminal. For example, the base station described below has been described and described by way of example to disclose a single node for communicating with the terminal, it may be replaced with other terminals or infrastructure devices for communicating with the terminal as needed.

That is, the present technical concept may be applied to not only communication between the terminal and the base station, but also device to device, side link communication, and vehicle communication (V2X). In particular, the present invention may be applied to the terminal-to-terminal communication in the next-generation radio access technology, and the terms such as a signal and a channel of the present specification may be variously modified and applied according to the type of communication between terminals.

For example, the terms PSS and SSS may be changed and applied to a primary D2D synchronization signal (PSSS) and a secondary D2D synchronization signal (SSSS) in terminal-to-device communication, respectively. In addition, the channel for transmitting broadcast information such as the above-described PBCH is changed to PSBCH, the channel for transmitting data in sidelinks such as PUSCH and PDSCH is converted into PSSCH, and the channel for transmitting control information such as PDCCH and PUCCH is changed to PSCCH. Can be applied. On the other hand, in the terminal-to-terminal communication, a discovery signal is required, which is transmitted and received through the PSDCH. However, it is not limited to these terms.

Hereinafter, the technical concept will be described as an example of communication between the terminal and the base station, but the base station node may be replaced with another terminal as necessary, and thus the technical concept may be applied.

NR (New Radio)

The NR, which was recently implemented in 3GPP, has been designed to meet various QoS requirements required for each detailed and detailed usage scenario as well as improved data rate compared to LTE. Specifically, eMBB (enhancement Mobile BroadBand), mMTC (massive MTC) and URLLC (Ultra Reliable and Low Latency Communications) are defined as typical usage scenarios of NR, and a flexible frame compared to LTE as a method for satisfying each usage scenario requirements. Structure design is required. Since each usage scenario has different requirements for data rates, latency, reliability, coverage, etc., it is a method for efficiently satisfying requirements for each usage scenario through a frequency band constituting an arbitrary NR system. For example, it is designed to efficiently multiplex radio resource units based on subcarrier spacing, subframe, TTI, etc.).

As one method for this, a method of multiplexing and supporting scheduling units in a time domain based on TDM, FDM, or TDM / FDM through one or a plurality of NR component carriers for numerology having different subcarrier spacing values In constructing, discussions were made on how to support more than one time unit. In this regard, in NR, a subframe is defined as a kind of time domain structure, and as a reference numerology for defining the subframe duration, 14 OFDM symbols of 15 kHz sub-carrier spacing (SCS) based normal CP overhead, which is the same as LTE, are used. We decided to define a single subframe duration consisting of. Accordingly, in NR, the subframe has a time duration of 1 ms. However, unlike LTE, a subframe of NR is an absolute reference time duration, and slots and mini-slots may be defined as time units based on actual uplink / downlink data scheduling. In this case, the number of OFDM symbols and the y value of the corresponding slot are determined to have a value of y = 14 regardless of the SCS value in the case of normal CP.

Accordingly, any slot consists of 14 symbols, and depending on the transmission direction of the slot, all symbols are used for DL transmission, all symbols are used for UL transmission, or DL portion + (gap) + It can be used in the form of a UL portion.

In addition, in any numerology (or SCS), a mini-slot consisting of fewer symbols than the slot is defined, and a short time-domain scheduling interval for transmitting / receiving uplink / downlink data is set or slot aggregation based on this. A long time-domain scheduling interval for transmitting and receiving uplink / downlink data may be configured. In particular, in case of transmission / reception of latency critical data such as URLLC, it is difficult to satisfy latency requirement when scheduling is performed by slot unit based on 1ms (14 symbols) defined in numerology-based frame structure with small SCS value such as 15kHz. For this purpose, a mini-slot consisting of fewer OFDM symbols than the corresponding slot can be defined to define scheduling for latency critical data such as the corresponding URLLC.

Alternatively, as described above, by supporting multiplexing numerology having different SCS values in one NR carrier by TDM and / or FDM method, based on slot (or mini-slot) length defined for each numerology Scheduling data according to latency requirements is also being considered. For example, as shown in FIG. 1 below, when the SCS is 60 kHz, the symbol length is reduced to about 1/4 compared to the case of the SCS 15 kHz. Thus, when one slot is configured with 14 OFDM symbols, the slot is based on the corresponding 15 kHz. The length is 1ms, while the 60kHz-based slot length is reduced to about 0.25ms.

As described above, in NR, a method of satisfying each requirement of URLLC and eMBB by defining different SCS or different TTI length is being discussed.

PDCCH

In NR and LTE / LTE-A systems, L1 control information such as DL assignment Downlink Control Information (DCI) and UL grant DCI is transmitted and received through a PDCCH. A control channel element (CCE) is defined as a resource unit for transmitting the PDCCH, and in the NR, a control resource set (CORESET), which is a frequency / time resource for transmitting the PDCCH, may be set for each terminal. In addition, each CORESET may be configured with one or more search spaces consisting of one or more PDCCH candidates for the UE to monitor the PDCCH. For details of the PDCCH in NR, the contents of TS 38.211 and TS 38.213 are extracted and attached through TS 38.211 of appendix [1] and TS 38.213_PDCCH of appendix [2].

Wider bandwidth operations

In the case of the existing LTE system, it supports scalable bandwidth operation for any LTC CC (Component Carrier). That is, according to the frequency deployment scenario, any LTE operator may configure a bandwidth of at least 1.4 MHz and up to 20 MHz in configuring one LTE CC, and a normal LTE terminal may have a bandwidth of 20 MHz for one LTE CC. Supports transmit and receive capability.

However, in the case of NR, the design is made to support NR terminals having different transmit / receive bandwidth capabilities through one wideband NR CC. Accordingly, the NR is subdivided for an arbitrary NR CC as shown in FIG. 2 below. By configuring one or more bandwidth part (s) consisting of the configured bandwidth, it is required to support flexible wider bandwidth operation through different bandwidth part configuration and activation for each terminal.

In more detail, in NR, one or more bandwidth parts may be configured through one serving cell configured from a terminal perspective, and the corresponding UE activates one DL bandwidth part and one UL bandwidth part in the corresponding serving cell and uplink / downlink data. It is defined to be used for sending and receiving. In addition, when a plurality of serving cells are configured in the corresponding UE, that is, even for a UE to which CA is applied, one DL bandwidth part and / or UL bandwidth part is activated for each serving cell to use up / down radio resources of the corresponding serving cell. It is defined to be used for link data transmission and reception.

Specifically, the initial bandwidth part for the initial access procedure of the terminal in any serving cell is defined, one or more UE-specific bandwidth part (s) is configured through dedicated RRC signaling for each terminal, and fallback for each terminal A default bandwidth part for operation can be defined.

However, depending on the capability and configuration of the bandwidth part (s) of the terminal in any serving cell can be defined to activate and use a plurality of DL and / or UL bandwidth parts at the same time, in NR rel-15 any terminal in any terminal It is defined to activate only one DL bandwidth part and UL bandwidth part at a time.

UCI transmission procedure

According to the PUCCH resource allocation method for HARQ ACK / NACK feedback of the terminal defined in the NR, when the PDSCH resources are allocated, the base station performs HARQ ACK feedback for the PDSCH through the ARI (ACK Resource Indicator) information region of the DL assignment DCI format It indicates the PUCCH resource allocation information for. In more detail, the base station transmits one or more PUCCH resource set configuration information composed of one or more PUCCH resources for each UL BWP configured for an arbitrary terminal to each terminal through RRC signaling. Accordingly, the ARI has been defined to indicate the PUCCH resource index for HARQ ACK feedback for a certain PDSCH, the PUCCH resource set is determined by the payload size of the UCI to be transmitted through the PUCCH of the slot.

In addition, PUCCH resources for UCI transmission such as SR or CSI other than the HARQ ACK / NACK may also be allocated through higher layer signaling or may be indicated through DCI.

However, when a PUCCH resource for UCI transmission and a PUSCH resource for data transmission overlap in a time interval in an arbitrary slot, the corresponding UCI may be transmitted by multiplexing the PUSCH.

Specifically, according to a method of multiplexing and reporting UCI to PUSCH, a PUCCH resource for UCI transmission and a PUSCH transmission resource for data transmission overlap each other in a time interval, and a time condition in consideration of uplink / downlink transmission / reception processing time of a corresponding UE is determined. If satisfied, it is defined to transmit by multiplexing the corresponding UCI through the PUSCH transmission resource. In this case, the base station sets a specific resource for the UCI multiplexing, that is, an offset value (β _offset ) for determining the amount of resources to be used for the UCI transmission among the allocated PUSCH transmission resources through DCI or higher layer signaling. It is defined to transmit to the terminal. A specific UE UCI transmission method is attached through appendix [3].

NR-U

In the case of unlicensed bands, unlike licensed bands, any service provider or individual can be used to provide wireless communication service within the regulation of each country, not a wireless channel exclusively used by any service provider. Accordingly, when providing NR service through unlicensed band, co-existence problem with various short-range wireless communication protocols such as WiFi, Bluetooth, NFC, etc. already provided through the unlicensed band and co-existence between each NR provider or LTE provider The problem needs to be solved. Accordingly, when providing NR service through the unlicensed band, the power level of the radio channel or carrier to be used is sensed before transmitting the radio signal in order to avoid interference or collision between the respective radio communication services to determine whether the corresponding radio channel or carrier is available. There is a need to support an LBT (Listen Before Talk) based wireless channel access method. In this case, if a specific radio channel or carrier of the unlicensed band is in use by another radio communication protocol or another operator, the radio communication service through the unlicensed band may be restricted to the provision of NR service through the band. Unlike the wireless communication service through the LAN, the QoS required by the user cannot be guaranteed.

In addition, when any wideband NR-U cell is configured through an unlicensed band, in order to increase the access probability for the corresponding NR-U cell, considering the coexistence with other RATs, the system bandwidth of the NR-U cell or the corresponding NR-U A DL or UL BWP configured for any terminal in a cell is divided into sub-bands to perform LBT in a corresponding sub-band unit, and a design of a radio protocol for transmitting a radio signal in a corresponding sub-band unit is necessary.

As a method for increasing the uplink transmission probability of a terminal in an NR-U cell of the present invention, a method for allocating a plurality of transmission opportunities in a frequency axis in any uplink radio channel or wireless signal transmission is proposed.

As described above, in order for an arbitrary node to transmit a radio signal through an unlicensed band, an LBT (Listen Before Talk) for confirming whether the corresponding radio channel is occupied by another node should be performed first. . Therefore, in order to transmit PDSCH for an arbitrary UE in an NR-U cell configured by an arbitrary NR base station, the base station performs an LBT for a frequency band configured with the corresponding NR-U cell, and then the PDCCH and Accordingly, PDSCH transmission can be performed.

Similarly, in order to transmit an uplink signal, the terminal must first perform LBT on the corresponding uplink radio channel.

In the NR, as described above, a bandwidth part (BWP) is configured for each UE for transmitting and receiving an uplink / downlink radio physical channel and a physical signal for the UE, and one BWP is activated and used. In addition, unlike LTE, the system bandwidth constituting the NR cell can be configured with a broadband of 100 MHz or more according to the FR (Frequency Range) in which the NR cell is configured. Accordingly, a bandwidth of one BWP for an arbitrary terminal also has a broadband configuration of 100 MHz or more. It is possible. On the other hand, if the DL or UL BWP for any UE is larger than 20MHz in the NR-U cell configured through the unlicensed spectrum, when performing LBT in the corresponding BWP unit to perform up / down link transmission / reception, LBT is transmitted in 20MHz units. It may be less competitive in terms of channel access probability than other RATs such as WiFi. In order to solve this problem, any DL or UL BWP configured for any UE is partitioned into sub-bands having arbitrary bandwidths to perform LBT in units of corresponding sub-bands, and uplink / downlink control channel and data. A method of transmitting and receiving a channel may be considered. For example, when the bandwidth of the DL BWP configured for any UE is 80MHz, the DL BWP is divided into four sub-bands having a bandwidth of 20MHz, and resource allocation in units of corresponding sub-bands and transmission and reception of PDCCH or PDSCH accordingly. This can be defined to be possible. As a similar example in the case of the uplink, when a certain UL BWP bandwidth is 60 MHz, the UL BWP is divided into three sub-bands having a bandwidth of 20 MHz, and resource allocation in the corresponding sub-band units and corresponding PUCCH or PUSCH transmission and reception are performed. Can be defined to be possible.

The present invention proposes a specific resource allocation method for supporting uplink transmission in sub-band units in the NR-U cell.

To this end, the present invention proposes a method for allocating an uplink shared channel for data transmission, that is, an uplink transmission resource in units of sub-bands based on a PUSCH, but in addition to the PUSCH, all uplink radio channels (eg PUCCH, The same method can be applied to PRACH, etc.) and all uplink radio signals (eg SRS, etc.), which are included in the scope of the present invention.

In particular, the present invention relates to a specific method of allocating a plurality of transmission opportunities, that is, a plurality of transmission resources in the frequency axis in order to increase the LBT success probability for uplink transmission of the terminal based on the bandwidth that is a unit of the LBT on the frequency axis. Suggest.

In the present invention, the NR-U cell, that is, a frequency band that becomes a unit of LBT for radio channel transmission in an unlicensed spectrum is referred to as a sub-band, but the scope of the present invention is not limited by the name.

Frequency domain repetition

As briefly described above, as a method for increasing a transmission probability of an uplink radio channel or a radio signal of a terminal in an NR-U cell, a plurality of transmission resources may be allocated on the frequency axis for arbitrary uplink transmission.

Option 1: sub-band based repetition

As a method of configuring a plurality of uplink transmission resources on the frequency axis, in allocating any uplink transmission resource, a frequency domain resource is allocated based on RBs constituting one sub-band, and one of the uplink transmission resources is allocated. Frequency domain resource assignment information allocated based on a sub-band may be defined to be equally applied to all sub-bands included in a UL BWP of a corresponding UE.

For example, as a PUSCH transmission resource allocation method for transmitting an arbitrary uplink TB, a PUSCH transmission resource is allocated based on one sub-band that is a unit of an LBT, and one sub- Resource allocation information in band units may be defined to be equally applied to all sub-bands configuring the corresponding UL BWP. That is, when the UL BWP of any terminal is composed of k sub-bands, the PUSCH transmission resources for the terminal may be defined to be identically allocated through the k sub-bands. In this case, k PUSCH transmission opportunities may be allocated in the frequency axis. In more detail, in the method of allocating frequency domain resource assignment information through a corresponding UL grant when PUSCH resource allocation for a certain UE, RB assignment information in units of sub-bands is used instead of RB assignment information based on UL BWP. Can be defined to assign. Alternatively, the PUSCH resource allocation through the configured grant may be defined to allocate RB assignment information in units of sub-bands instead of RB assignment information based on UL BWP. As such, the terminal receiving the RB assignment information in the sub-band units may be defined to interpret the PUSCH transmission opportunities for the corresponding terminal by applying the same RB assignment information to all sub-bands constituting the active UL BWP. have.

However, additionally, the frequency domain repetition of the corresponding sub-band unit may be set by the base station. In other words, in allocating PUSCH resources through UL BWPs for the UEs to the UEs, the BS should apply RB assignment and sub-band repetition in units of sub-bands or UL BWPs defined in the existing NR. By setting whether to apply a single frequency domain resource assignment of the unit can be transmitted to the UE through UE-specific or cell-specific RRC signaling, MAC CE signaling or L1 control signaling.

In addition, the corresponding sub-band repetition may be defined such that repeated frequency resource allocation is performed only through some sub-bands rather than all sub-bands constituting the corresponding UL BWP. As one method for this, the number of sub-bands in which the sub-band repetition is performed among the k sub-bands, the R value is the index of the sub-band where the repetition starts, that is, the starting sub-band index (or offset), j The value may be defined to be explicitly or implicitly set by the base station. For example, the R value may be set by the base station through UE-specific or cell-specific higher layer signaling. In this case, a separate R value may be set for each UL BWP for a terminal, or a separate R value may be set for each UL radio channel / signal (e.g. PUSCH, PUCCH, SRS, PRACH, etc.). Alternatively, the R value may be dynamically set through MAC CE signaling or L1 control signaling. Alternatively, the R value may be implicitly set as a function of the number of sub-bands or the UL system bandwidth constituting each UL BWP.

The starting sub-band index, j value may also be set by the base station through UE-specific or cell-specific higher layer signaling. In this case, a separate j value may be set for each UL BWP for a certain terminal, or a separate j value may be set for each UL radio channel / signal (e.g. PUSCH, PUCCH, SRS, PRACH, etc.). Alternatively, the j value may be dynamically set through MAC CE signaling or L1 control signaling. Alternatively, the j value may be implicitly set as a function of the C-RNTI, the PCID, the number of sub-bands constituting the UL BWP, the UL system bandwidth, or the like.

In this case, when j and R values are given, the repetition of the corresponding sub-band unit is performed through sub-bands, j consecutive R subbands, or corresponds to the quotient of the total number of subbands k divided by R. It can be defined to configure R sub-bands by hopping the sub-bands as a unit.

As another method, a starting sub-band index, a j value, a sub-band hopping size, and a h value for repetition may be set at the base station to explicitly or implicitly signal the corresponding terminal. The method of setting the j value and the h value may be applied in the same manner as in the embodiment for setting the R value and the j value.

As described above, the subpetitive repetition method may be equally applied to not only PUSCH resource allocation but also a plurality of resource allocation for all uplink radio channels or radio signals such as PUCCH or PRACH or SRS. In addition, in a method of signaling whether the aforementioned sub-band repetition is applied or a parameter for applying repetition to a corresponding terminal, a signaling method for allocating a corresponding radio resource or a radio signal (eg, RRC signaling or L1 control signaling, etc.). ) Can be applied in different ways.

In addition, the same method as described above may be applied to a case where a BWP unit repetition configured for a certain terminal is performed instead of a sub-band unit repetition within one BWP, which may be included in the scope of the present invention.

Scheme 2. RB hopping based repetition

As another method of configuring a plurality of uplink transmission resources on the frequency axis, in allocating any uplink transmission resource, the frequency domain resource is allocated based on the RB constituting the corresponding UL BWP as in the prior art. The uplink transmission resource according to the allocated RB assignment information may be defined to be repeatedly allocated by hopping by a predetermined offset value on the frequency axis.

Even in this case, as in the above method 1, RB hopping-based repetition may be set by the base station through higher layer signaling, MAC CE signaling, or L1 control signaling.

When RB hopping-based repetition is applied for an arbitrary terminal, the base station may set a corresponding hopping size and H value to transmit to the terminal. Alternatively, the base station may set the number of frequency domain repetition and the R value to transmit to the terminal. The H value or the R value may be explicitly or implicitly signaled by the base station as in the method 1 above. For example, the corresponding H value or R value may be UE-specific or cell-specific higher layer signaling by the base station. In this case, the corresponding H value or R value may be set by a separate value for each UL BWP configured for the corresponding terminal or may be assigned a separate value for each radio channel / signal. Alternatively, the corresponding H value or R value may be transmitted to the terminal through MAC CE signaling or L1 control signaling. However, different signaling methods may be applied according to the resource allocation method for each radio channel or radio signal. For example, the L1 control signaling method is applied when the UL grant based PUSCH resource allocation, and the RRC signaling method may be applied when the PUSCH resource allocation based on the configured grant.

Alternatively, the H value or the R value may be implicitly set as a function of the C-RNTI, the PCID, the number of sub-bands constituting the UL BWP, the UL system bandwidth, or the like.

When the H value is indicated as described above, the number of repetitive allocations on the frequency axis in the corresponding UL BWP, that is, the R value is the bandwidth (ie number of RBs) of the corresponding UL BWP, and the number of RBs allocated for configuring one transmission opportunity. (Ie, the number of RBs allocated through the frequency domain resource assignment), and the indicated H value. On the contrary, when the R value is indicated, the hopping size and the H value are the bandwidths (ie number of RBs) of the corresponding UL BWPs, and the number of RBs allocated for configuring one transmission opportunity (that is, allocation through the frequency domain resource assignment. Number of RBs), and the indicated R value.

3 is a diagram illustrating a configuration of a base station 1000 according to another embodiment.

Referring to FIG. 3, the base station 1000 according to another embodiment includes a controller 1010, a transmitter 1020, and a receiver 1030.

In the method for setting uplink transmission resources of a terminal in an unlicensed band required for carrying out the above-described present invention, the controller 1010 includes a resource block (RB) constituting one sub-band. To control the overall operation of the base station 1000 according to the method for allocating the frequency axis resources.

The transmitter 1020 and the receiver 1030 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention.

4 is a diagram illustrating a configuration of a user terminal 1100 according to another embodiment.

Referring to FIG. 4, the user terminal 1100 according to another embodiment includes a receiver 1110, a controller 1120, and a transmitter 1130.

The receiver 1110 receives downlink control information, data, and a message from a base station through a corresponding channel.

In addition, the control unit 1120 is a resource block (RB, resource) constituting one sub-band in the method for setting uplink transmission resources of the terminal in the unlicensed band required to perform the present invention described above based on the block) controls the overall operation of the user terminal 1100 according to the method for allocating the frequency axis resources.

The transmitter 1130 transmits uplink control information, data, and a message to a base station through a corresponding channel.

In addition, terms such as "system", "processor", "controller", "component", "module", "interface", "model", "unit" generally refer to computer-related entity hardware, a combination of hardware and software, It may mean software or running software. For example, the foregoing components may be, but are not limited to, a process driven by a processor, a processor, a controller, a control processor, an object, an execution thread, a program, and / or a computer. For example, both an application running on a controller or processor and a controller or processor can be components. One or more components can be within a process and / or thread of execution and a component can be located on one system or deployed on more than one system.

The standard contents or standard documents mentioned in the above embodiments are omitted to simplify the description of the specification and form a part of the present specification. Accordingly, the addition of the contents of the above standard and part of the standard documents to the specification or the description in the claims should be interpreted as falling within the scope of the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Claims (1)

In the method for setting uplink transmission resources of the terminal in the unlicensed band,
A method of allocating frequency axis resources based on a resource block (RB) constituting one sub-band.

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