KR20190038300A - Method for switching bandwidth part in new radio and Apparatuses thereof - Google Patents

Abstract

The present invention relates to a method and an apparatus for switching a bandwidth part to support a terminal using various bandwidth parts in a next-generation wireless access network. According to an embodiment of the present invention, the method for switching a bandwidth part to reduce power consumption when a terminal wirelessly transmits and receives data, comprises the steps of: transmitting physical layer capability information including bandwidth part switching delay type information; receiving downlink control information including a bandwidth part indication field indicating any one bandwidth part different from an activated bandwidth part among one or more bandwidth parts included in a bandwidth part set configured in a terminal, and scheduling information on a data channel; and activating the bandwidth part indicated by a value of the bandwidth part indication field in consideration of a switching time determined in accordance with the bandwidth part switching delay type information, and transmitting and receiving the data channel in accordance with the scheduling information. The bandwidth part indicated by the value of the bandwidth part indication field is determined by reflecting the traffic load of the terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a method and a device for switching a bandwidth part in a next generation wireless network,

The present embodiments propose a method and apparatus for switching a bandwidth part to support a terminal using various bandwidth parts in a next generation radio access network (hereinafter referred to as " NR [New Radio] ").

3GPP recently approved a study item "Study on New Radio Access Technology" for studying next generation wireless access technology (ie, 5G radio access technology), and based on this, RAN WG1 Frame structures, channel coding and modulation, waveforms and multiple access schemes are underway. NR is required not only to improve data transmission rate in comparison with LTE / LTE-Advanced, but also to design various requirements that are required according to detailed and specific usage scenarios.

In order to meet the requirements of each scenario, LTE / LTE-Advanced has been proposed as a representative use scenario of NR. In this case, enhancement Mobile BroadBand (MMB), massive Machine Type Communication (MMTC) and Ultra Reliable and Low Latency Communications A flexible frame structure design is required.

Particularly, when a terminal of the NR uses various bandwidth parts (BWPs, bandwidth parts), there is an increasing need to set up a concrete and efficient method for switching to a bandwidth part suitable for a terminal or a communication environment when transmitting and receiving a data channel have.

It is an object of the present invention to provide a concrete method for setting and activating a bandwidth part suitable for a terminal or a communication environment for data channel transmission / reception between a terminal and a base station in a next generation wireless network.

According to an embodiment of the present invention, there is provided a method of switching a bandwidth part for reducing power consumption when a mobile station transmits and receiving wireless data, the method comprising: receiving a bandwidth part (BWP) switching delay type information A bandwidth part indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth part set configured in the terminal, Receiving a downlink control information including a bandwidth part indicator field and scheduling information for a data channel and a bandwidth part indication field considering a transition time determined according to a bandwidth part switching delay type information, The bandwidth part indicated by the value of < RTI ID = 0.0 > Comprising the step of transmitting and receiving the emitter channel, bandwidth parts as indicated in accordance with the value of bandwidth parts indication field provides a method, it characterized in that it is determined to reflect the traffic load (traffic load) of a terminal.

According to another aspect of the present invention, there is provided a method of switching a bandwidth part for reducing power consumption when a base station transmits and receiving wireless data, the method comprising: receiving physical layer capability information including bandwidth part switching delay type information from the terminal; Determining a bandwidth part indication field indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth parts configured in the terminal, reflecting the traffic load, When the bandwidth part indicated by the value of the bandwidth part indication field is activated in consideration of the switching time determined according to the bandwidth part switching delay type information and the downlink control information including the scheduling information on the channel, According to the scheduling information, Subjects provides a method, characterized in that.

In addition, one embodiment provides a method for a terminal to switch a bandwidth part, comprising the steps of: transmitting physical layer capability information including bandwidth part switching delay type information; transmitting one or more bandwidth parts Receiving a downlink control information including scheduling information for a bandwidth part indication field and a data channel indicating one of the bandwidth parts different from the active bandwidth part and a switching time determined according to the bandwidth part switching delay type information And activating a bandwidth part indicated according to the value of the bandwidth part indication field, and transmitting / receiving the data channel according to the scheduling information.

Also, an embodiment provides a method for a base station to switch a bandwidth part, comprising: receiving physical layer capability information including bandwidth part switching delay type information from a terminal; Determining a bandwidth part indication field indicating a bandwidth part different from the active bandwidth part of the parts, transmitting downlink control information including scheduling information for a bandwidth part indication field and a data channel to a terminal And transmitting and receiving the data channel according to the scheduling information when the bandwidth part indicated by the value of the bandwidth part indication field is activated in consideration of the switching time determined according to the bandwidth part switching delay type information.

In an exemplary embodiment of the present invention, a terminal for switching a bandwidth part includes a transmitter for transmitting physical layer capability information including bandwidth part switching delay type information, A bandwidth part indicating a bandwidth part different from the bandwidth part and a receiving part receiving downlink control information including scheduling information for a data channel, and a bandwidth part Considering a switching time determined according to switching delay type information And activating a bandwidth part indicated by the value of the bandwidth part indication field, and transmitting and receiving the data channel according to the scheduling information.

In addition, one embodiment of the present invention is a base station for switching a bandwidth part, comprising: a receiving unit for receiving physical layer capability information including bandwidth part switching delay type information from a terminal, one or more bandwidth parts A control part for determining a bandwidth part indication field indicating one of the bandwidth parts different from the active part of the bandwidth and downlink control information including scheduling information for a bandwidth part indication field and a data channel to the terminal, And a transmitter for transmitting the data channel according to the scheduling information when the bandwidth part indicated by the value of the bandwidth part indication field is activated in consideration of the switching time determined according to the switching delay type information.

According to the present embodiments, it is possible to provide a concrete method of setting and activating a bandwidth part suitable for a terminal or a communication environment for data channel transmission / reception between a terminal and a base station in a next generation wireless network.

FIG. 1 illustrates the alignment of OFDM symbols in the case of using different subcarrier spacings according to the present embodiments. Referring to FIG.
2 is a diagram illustrating a conceptual example of a bandwidth part in this embodiment.
3 is a conceptual illustration of a plurality of bandwidth part settings in this embodiment.
4 is a conceptual illustration of a UE-specific bandwidth part setting in this embodiment.
5 is a diagram illustrating a procedure for a terminal to switch a bandwidth part by reflecting a traffic load of a terminal in the present embodiment.
FIG. 6 is a diagram illustrating a procedure for a BS to switch a bandwidth part by reflecting a traffic load of the MS in the present embodiment.
7 is a diagram illustrating a procedure in which a terminal switches bandwidth parts in the present embodiment.
8 is a diagram illustrating a procedure for the base station to switch bandwidth parts in the present embodiment.
FIGS. 9 and 10 are diagrams for explaining whether or not a bandwidth part indicator field according to the downlink control information format (DCI format) is included in the present embodiment.
11 to 14 are diagrams showing conceptual examples of the switching of the bandwidth part in this embodiment.
15 is a diagram illustrating a configuration of a base station according to the present embodiments.
16 is a diagram illustrating a configuration of a terminal according to the present embodiments.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference symbols as possible even if they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

As used herein, a wireless communication system refers to a system for providing various communication services such as voice, packet data, and the like. A wireless communication system includes a user equipment (UE) and a base station (BS).

The user terminal is a comprehensive concept that means a terminal in a wireless communication, and it is a comprehensive concept which means a mobile station (MS) in GSM, a mobile station (MS) in UT (User Terminal), a Subscriber Station (SS), a wireless device, and the like.

A base station or a cell generally refers to a station that communicates with a user terminal and includes a Node-B, an evolved Node-B, a gNode-B, a Low Power Node A sector, a site, various types of antennas, a base transceiver system (BTS), an access point, a point (for example, a transmission point, a reception point, a transmission / reception point) (RRH), a radio unit (RU), and a small cell, as well as a relay cell, a relay node, a megacell, a macrocell, a microcell, a picocell, a femtocell, an RRH,

Since the various cells listed above exist in the base station controlling each cell, the base station can be interpreted into two meanings. Macro cell, micro cell, picocell, femtocell, small cell, or 2) the wireless region itself in connection with the wireless region. 1), all of the devices that interact to configure the wireless area to be cooperatively controlled by the same entity are all pointed to the base station. A point, a transmission / reception point, a transmission point, a reception point, and the like are examples of the base station according to the configuration method of the radio area. 2 may direct the base station to the wireless region itself to receive or transmit signals at the point of view of the user terminal or in the vicinity of the neighboring base station.

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

Herein, the user terminal and the base station are used in a broad sense as two (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 a specific term or word Do not.

Here, an uplink (UL, or uplink) means a method of transmitting / receiving data to / from a base station by a user terminal, and a downlink (DL or downlink) .

The time division duplex (TDD) scheme, which is transmitted using different time periods, can be used for the uplink and downlink transmission, and a frequency division duplex (FDD) scheme in which different frequencies are used, a TDD scheme and an FDD scheme A hybrid method can be used.

In the wireless communication system, the uplink and the downlink are configured with reference to one carrier or carrier pair to form 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), and the like. The physical downlink shared channel (PDSCH), the physical uplink shared channel (PUSCH) It is composed of the same data channel and transmits data.

A downlink may refer to a communication or communication path from a multipoint transmission / reception point to a terminal, and an uplink may refer to a communication or communication path from a terminal to a multiple transmission / reception point. At this time, in the downlink, the transmitter may be a part of the multiple transmission / reception points, and the receiver may be a part of the terminal. Also, in the uplink, the transmitter may be a part of the terminal, and the receiver may be a part of multiple transmission / reception points.

Hereinafter, a situation in which a signal is transmitted / received through a channel such as PUCCH, PUSCH, PDCCH, and PDSCH is expressed as 'PUCCH, PUSCH, PDCCH and PDSCH are transmitted and received'.

Meanwhile, the High Layer Signaling described below includes RRC signaling for transmitting RRC information including RRC parameters.

The base station performs downlink transmission to the UEs. The base station includes downlink control information, such as scheduling, required for reception of a downlink data channel, which is a primary physical channel for unicast transmission, and physical downlink control information for transmitting scheduling grant information for transmission in an uplink data channel. A control channel can be transmitted. Hereinafter, the transmission / reception of a signal through each channel will be described in a form in which the corresponding channel is transmitted / received.

There are no restrictions on multiple access schemes applied in wireless communication systems. (TDMA), Frequency Division Multiple Access (FDMA), Code Division Multiple Access (CDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Non-Orthogonal Multiple Access (NOMA) Various multiple access schemes such as OFDM-CDMA can be used. Here, the NOMA includes Sparse Code Multiple Access (SCMA) and Low Density Spreading (LDS).

One embodiment of the present invention relates to asynchronous wireless communications that evolve into LTE / LTE-Advanced, IMT-2020 over GSM, WCDMA, HSPA, and synchronous wireless communications such as CDMA, CDMA- Can be applied.

In this specification, a MTC (Machine Type Communication) terminal may mean a terminal supporting low cost (or low complexity) or a terminal supporting coverage enhancement. Alternatively, the MTC terminal may refer to a terminal defined in a specific category for supporting low cost (or low complexity) and / or coverage enhancement.

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

In this specification, NarrowBand Internet of Things (NB-IoT) terminal means a terminal supporting wireless access for cellular IoT. The objectives of NB-IoT technology include improved indoor coverage, support for large-scale low-rate terminals, low latency sensitivity, ultra-low cost, low power consumption, and optimized network architecture.

Enhanced Mobile Broadband (eMBB), massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC) have been proposed as typical usage scenarios in NR (New Radio), which is under discussion in 3GPP.

In this specification, a frequency, a frame, a subframe, a resource, a resource block, a region, a band, a subband, a control channel, a data channel, a synchronization signal, various reference signals, various signals, May be interpreted as past or presently used meanings or various meanings used in the future.

In the following description, the technical idea is described based on two nodes of the terminal and the base station. However, this is for the sake of understanding, and the same technical idea can be applied between the terminal and the terminal. For example, the base station described below is illustratively disclosed as a node that performs communication with a terminal, and may be replaced with another terminal or an infrastructure device that performs communication with the terminal as needed.

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

For example, the PSS and the SSS may be applied to the inter-terminal communication by changing the terms as PSSS (Primary D2D Synchronization Signal) and SSSS (Secondary D2D Synchronization Signal), respectively. The channel for transmitting broadcast information such as the above-described PBCH is a PSBCH. The channel for transmitting data on the side link is a PSSCH such as a PUSCH and a PDSCH. A channel for transmitting control information such as a PDCCH and a PUCCH is changed to a PSCCH . On the other hand, a discovery signal is required in the inter-terminal communication, which is transmitted and received through the PSDCH. However, the present invention is not limited to these terms.

Hereinafter, the technical idea of the present invention will be described with reference to communication between the terminal and the base station, but the technical idea can be applied when the base station node is replaced with another terminal as necessary.

NR (New Radio)

The 3GPP recently approved a study item "Study on New Radio Access Technology" for studying next generation wireless access technology (that is, 5G wireless access technology) Channel coding and modulation, waveforms and channel coding & modulation, waveform & multiple access schemes, and so on.

NR is required to be designed to satisfy not only the improved data transmission rate as compared to LTE / LTE-Advanced, but also various requirements that are required according to granular and specific usage scenarios. In particular, enhancement Mobile BroadBand (eMBB), massive MTC (MMTC) and Ultra Reliable and Low Latency Communications (URLLC) have been proposed as typical usage scenarios of NR, and requirements for each usage scenario have been proposed. It is required to design a flexible frame structure as compared with LTE / LTE-Advanced.

Specifically, eMBB, mMTC, and URLLC are considered as typical usage scenarios of NR that are being discussed in 3GPP. Since each usage scenario has different requirements for data rates, latency, coverage, etc., it is possible to use each frequency band constituting any NR system A radio resource unit based on different numerology (e.g., subcarrier spacing, subframe, TTI, etc.) is used as a method for efficiently satisfying requirements according to a usage scenario There is a need for efficient multiplexing.

As a method for this, a numerator with different subcarrier spacing (SCS) values is multiplexed on a TDM, FDM or TDM / FDM basis via one NR carrier to support Methods and methods for supporting one or more time units in constructing scheduling units in the time domain have been discussed. In this regard, in the NR, a subframe has been defined as one type of time domain structure, and a reference numerology for defining a corresponding subframe duration has been described. We decided to define a single subframe duration consisting of 14 OFDM symbols of 15 kHz sub-carrier spacing (SCS) based normal CP overhead as LTE. Accordingly, the subframe in the NR has a time duration of 1 ms. However, unlike LTE, the subframe of the NR is an absolute reference duration, which is the time unit on which the actual uplink data scheduling is based, as a slot and a mini-slot ) Can be defined. In this case, the number of OFDM symbols constituting the corresponding slot and the y value are determined to have a value of y = 14 regardless of the SCS value in the normal CP.

Accordingly, an arbitrary slot is composed of 14 symbols, and all symbols are used for DL transmission according to a transmission direction of the slot, or all symbols are transmitted through a UL transmission Or may be used in the form of a DL portion + a gap + an UL portion.

In addition, a minislot consisting of fewer symbols than the slot is defined in an arbitrary numerology (or SCS), and a short-time time domain scheduling interval (time-domain) for uplink / downlink data transmission / scheduling interval may be set or a long-time time-domain scheduling interval for uplink / downlink data transmission / reception through slot aggregation may be configured.

In particular, in the case of transmission and reception of latency critical data such as URLLC, scheduling is performed in units of 1 ms (14 symbols) -based slot defined in a frame structure based on a transmitter with a small SCS value such as 15 kHz, It is difficult to satisfy the latency requirement. Therefore, a mini-slot having a smaller number of OFDM symbols than the corresponding slot is defined, and a latency critical such as the URLLC is defined based on the mini-slot. It is possible to define the scheduling for one data.

(Or mini-slot) lengths defined for the respective NR bearers by multiplexing and supporting the NR bearings having different SCS values in one NR carrier by the TDM scheme or the FDM scheme as described above, And scheduling the data according to the latency requirement is also considered. For example, as shown in FIG. 1, when the SCS is 60 kHz, the symbol length is reduced to about 1/4 of that of the SCS 15 kHz. Therefore, when one slot is composed of 14 OFDM symbols, While the slot length based on 60 kHz is reduced to about 0.25 ms.

As such, NR is discussing how to satisfy the requirements of URLLC and eMBB by defining different SCSs or different TTI lengths.

Wider bandwidth operations

For existing LTE systems, scalable bandwidth operation for any LTE Component Carrier (CC) was supported. That is, according to a frequency deployment scenario, an LTE provider can configure a bandwidth from 1.4 MHz to a maximum of 20 MHz in configuring one LTE CC, and a normal LTE terminal can configure a bandwidth for one LTE CC And supports the transmit and receive capacities of 20 MHz bandwidth.

However, in the case of NR, it is designed to support NR terminals having different transmission / reception bandwidth capabilities through a single wideband NR CC, In addition, one or more bandwidth parts (BWPs) composed of subdivided bandwidths for arbitrary NR CCs may be configured to set up and activate different bandwidth parts for each UE to obtain a wider bandwidth It is required to support wider bandwidth operation.

Specifically, in the NR, one or more bandwidth parts can be configured through one serving cell configured from the UE's point of view, and the corresponding UE can allocate one DL bandwidth part in the serving cell, And an uplink bandwidth part (UL bandwidth part) to be used for uplink / downlink data transmission / reception. Also, when a plurality of serving cells are set in the corresponding terminal, that is, for a terminal to which a CA is applied, a downlink bandwidth part or an uplink bandwidth part is activated for each serving cell to use a radio resource of the corresponding serving cell It is defined to be used for uplink / downlink data transmission / reception.

Specifically, an initial bandwidth part is defined for an initial access procedure of a UE in an arbitrary serving cell, and one or more UE-specific resources are allocated to each UE through dedicated RRC signaling. A bandwidth part is configured and a default bandwidth part for a fallback operation can be defined for each terminal.

However, it is possible to define a plurality of uplink / downlink bandwidth parts to be used at the same time according to the capability and bandwidth part configuration of a terminal in an arbitrary serving cell. In NR rel-15, however, Is defined to activate and use only one downlink bandwidth part and an uplink bandwidth part at any time in the network.

As described above, in the NR, one or more bandwidth parts can be configured through one serving cell configured from the terminal perspective. Specifically, in the case of a serving cell composed of an unpaired (i.e., TDD) or a paired (i.e., FDD) spectrum according to a transmission direction supported by the serving cell, at least one downlink bandwidth The uplink bandwidth part and the uplink bandwidth part can be respectively configured and the base station activates only one downlink bandwidth part and uplink bandwidth part at a given time for each terminal, For example, PDCCH / PDSCH, PUSCH / PUCCH, etc.). However, in the case of a DL-only or UL-only serving cell, only the downlink bandwidth part and the uplink bandwidth part can be configured and activated, respectively.

Accordingly, the terminal can independently configure the bandwidth part and activate the scell configured through the CA in addition to the initial access (Pcell).

In this way, when one or more bandwidth parts are configured in any serving cell configured for any terminal, the terminal can activate and use one bandwidth part at any time. Specifically, for downlink transmission / reception, one downlink subframe / slot / mini-slot among one or more downlink bandwidth parts configured for the corresponding terminal in the corresponding serving cell, Activate and use the bandwidth part. Similarly, for uplink transmission / reception, one uplink bandwidth (UL subframe / slot / mini-slot) in any uplink subframe / slot / mini-slot among one or more uplink bandwidth parts configured for the corresponding UE in the serving cell Activate and use the part.

Accordingly, the base station sets one or more downlink bandwidth parts having different bandwidths and one or more uplink bandwidth parts having different bandwidths for an arbitrary terminal, respectively, and sets the uplink bandwidth parts according to the traffic load for the corresponding terminal You can activate and use the appropriate bandwidth part. In particular, in NR, NR cells based on extended system bandwidth compared to LTE can be configured. Transmission and reception of radio signals and wireless channels based on the extended system bandwidth can be a great burden in terms of power consumption of the UE have.

In this regard, as described above, in a method of setting and operating a bandwidth part for an arbitrary terminal, a bandwidth part having various bandwidths is set up, and a bandwidth part of an appropriate bandwidth according to a traffic load of the terminal So that the battery power consumption of the corresponding terminal can be greatly reduced. For example, when the system bandwidth of an arbitrary NR cell is 100 MHz, in setting a bandwidth part for the corresponding terminal, a first bandwidth part of 10 MHz, a second bandwidth part based on 20 MHz, a third bandwidth part based on 40 MHz, , A fourth bandwidth part based on 80 MHz is set and an appropriate bandwidth part is activated and used according to the traffic load of the corresponding terminal at any one of the four bandwidth parts of the first to fourth, Based transmission and reception bandwidth (i.e., 100 MHz corresponding to the system bandwidth), the power consumption of the RF stage can be greatly reduced.

In this way, the configuration and instruction of the bandwidth part in the NR system can lead to a large gain in terms of battery power consumption of the UE, and the present invention proposes a specific bandwidth part operation method for this. Specifically, a plurality of bandwidth parts are set for an arbitrary terminal, a bandwidth part indication method for activating and switching a bandwidth part, and a concrete method for ensuring a bandwidth part transition time are proposed.

An activation / deactivation instruction of a downlink bandwidth part and an uplink bandwidth part for an arbitrary terminal may be performed through downlink control information (DCI) transmitted through a PDCCH. Specifically, activation and deactivation of the downlink bandwidth part may be performed through the DL assignment DCI including the resource allocation information for the PDSCH. Activation and deactivation of the uplink bandwidth part may also be performed through an UL grant including resource allocation information for the PUSCH.

In this embodiment, activation / deactivation of an uplink / downlink bandwidth part (DL / UL bandwidth part) through active scheduling DCI, that is, active DL / UL bandwidth part switching, (Active DL / UL bandwidth part switching) method through a DCI which does not include scheduling information and a specific operation method related to the uplink / downlink bandwidth part switching.

However, in this embodiment, the DL bandwidth part switching for any terminal in any serving cell deactivates the active DL bandwidth part and deactivates the new DL bandwidth part And the like. Similarly, UL bandwidth part switching for any terminal in any serving cell deactivates the current uplink bandwidth part and activates a new uplink bandwidth part. This is a series of processes.

Any NR component carrier (CC) may be composed of one or more bandwidth parts. In constructing a bandwidth part in any NR CC, the bandwidth part may be UE-specific or cell-specific. That is, as shown in FIG. 3, a different bandwidth part may be set for each UE, or the same bandwidth part may be set for all UEs for an arbitrary NR CC. However, FIG. 3 is only one example, and the present embodiment is not limited by the specific bandwidth of the NR CC and the bandwidth per bandwidth part.

When a bandwidth part is configured for an arbitrary NR CC, activation of the downlink bandwidth part for transmitting / receiving PDSCH / PUSCH between the base station and the UE, and uplink bandwidth part for PUCCH / PUSCH transmission / Through activation, an uplink / downlink bandwidth part for communication between the terminal and the base station can be established at any time instance.

Specifically, one or more bandwidth parts may be set for any terminal in any NR CC. As an example of how to set up a bandwidth part for an arbitrary terminal, an independent bandwidth part setting can be made for the downlink bandwidth part and the uplink bandwidth part. Accordingly, any one of the one or more downlink bandwidth parts set for an arbitrary terminal can perform reception on a downlink physical signal and a physical channel through one or more downlink bandwidth parts activated by the base station / network. Similarly, the UE performs transmission for uplink physical signals and physical channels to the base station through one or more uplink bandwidth parts activated by the base station / network among at least one uplink bandwidth part set for an arbitrary terminal.

The embodiments described below may be applied to a terminal, a base station, and a core network entity (MME) using all mobile communication technologies. For example, the present embodiments can be applied not only to mobile communication terminals to which LTE technology is applied but also to next generation mobile communication (5G mobile communication, New-RAT) terminals, base stations, and access and mobility functions (AMFs). For convenience of explanation, the base station may denote an eNB of an LTE / E-UTRAN or a base station (CU, DU, or CU and DU) in a 5G wireless network in which a CU (Central Unit) An entity implemented as a single logical entity), or gNB.

Numerology described herein refers to numerical characteristics and numerical values related to data transmission and reception, and may be determined by the value of subcarrier spacing (hereinafter also referred to as SCS or Subcarrier Spacing) . Hence, different numerology may mean that the subcarrier spacing that determines the numerology is different.

In this specification, the slot length may be expressed by the number of OFDM symbols constituting the slot, or may be represented by the time occupied by the slot. For example, when a spreader based on SCS of 15 kHz is used, the length of one slot may be represented by 14 OFDM symbols and may be expressed by 1 ms.

In this specification, a data channel is a concept that includes a downlink data channel (PDSCH) transmitted by a base station to a mobile station or an uplink data channel (PUSCH) transmitted by a mobile station to a base station. It may mean that the terminal receives the downlink data channel from the base station or transmits the uplink data channel to the base station.

Hereinafter, a more specific embodiment of a specific bandwidth part activation method for supporting PDSCH / PUSCH scheduling based on a bandwidth part in an arbitrary NR CC and a method for constructing scheduling control information based thereon will be described in detail. Explain. The embodiments described below may be applied individually or in any combination.

Details on bandwidth part activation

For a downlink bandwidth part established for any terminal, the base station / network can define to support the bandwidth part activation common to all downlink physical signals and physical channels. have. That is, an arbitrary UE transmits downlink physical channels such as PDCCH and PDSCH and downlink physical signals such as CSI-RS and DM RS for all downlink bandwidth parts activated by the base station / Can be expected to receive. Such an activated bandwidth part can be referred to as an active bandwidth part.

In this case, the UE performs monitoring on at least one control resource set (CORESET) set for PDCCH reception for each DL bandwidth part activated by the base station / network Can be defined.

In addition, the activation of the corresponding DL bandwidth part can be defined to occur via MAC CE signaling or L1 control signaling. Or activation of the corresponding DL bandwidth part may be defined through UE-specific / cell-specific higher layer signaling.

As another method for activating a DL bandwidth part for an arbitrary terminal, there is provided a method for activating at least one DL bandwidth part for PDCCH reception including a scheduling DCI and at least one DL bandwidth part for PDSCH reception (bandwidth part) may be separately set and activated by the base station / network. That is, in addition to activation of a DL bandwidth part for PDCCH reception from a set of a DL bandwidth part set for an arbitrary terminal, a bandwidth part for PDSCH reception, Can be defined such that the activation of the < / RTI >

In one embodiment of the present invention, one or more bandwidth parts including a CORESET to be monitored for receiving a PDCCH from a corresponding bandwidth part of a bandwidth part set for an arbitrary terminal in a base station / To be activated through the < / RTI > That is, a DL bandwidth part including at least one CORESET to be monitored for receiving a PDCCH from a corresponding DL part of a DL bandwidth part set for an arbitrary terminal is transmitted to a MAC CE May be defined to be activated through signaling or L1 control signaling.

In addition, a DL bandwidth part, that is, a DL bandwidth part for receiving the PDCCH, in which PDSCH transmission / reception for a corresponding UE is performed separately from activation of a DL bandwidth part for receiving the corresponding PDCCH, A DL bandwidth part for PDSCH transmission / reception through which PDSCH resource allocation can be performed through a DL assignment DCI transmitted through the BS can be activated by the BS / network. At this time, the DL bandwidth part for receiving the PDSCH is activated through a separate information area of MAC CE signaling or L1 control signaling, which is the same as the DL bandwidth part for PDCCH reception, May be defined to be activated via separate MAC CE signaling or L1 control signaling (e.g., DL assignment DCI).

As another method for setting or activating a bandwidth part for PDCCH reception and setting or activating a bandwidth part for PDSCH reception, a bandwidth part for receiving a PDCCH (bandwidth part is defined to be set up and activated through UE-specific or cell-specific higher layer signaling and a bandwidth part for PDSCH reception May be defined to be activated through a combination of DL assignment DCI or MAC CE signaling or corresponding MAC CE signaling and DL assignment DCI.

Specifically, a DL bandwidth part for receiving a PDCCH from an arbitrary UE includes UE-specific higher layer signaling or cell-specific higher layer signaling signaling through a CORESET (Control Resource Set) setting for the corresponding UE.

That is, if information such as a bandwidth part, a frequency resource, a monitoring period, and the like to be monitored for PDCCH reception is set in the corresponding terminal through the CORESET setting for receiving the PDCCH of the corresponding terminal, , It can be defined that the activation of the bandwidth part in which the corresponding CORESET is set is performed in the monitoring cycle. In addition, when the bandwidth part for PDSCH reception is activated, the PDSCH transmission resource is explicitly or implicitly transmitted through the DL assignment DCI transmitted through the PDCCH, It is possible to define that an allocation is made to an indication of a bandwidth part through which a DL bandwidth part for PDSCH reception is activated.

The same concept as that of the above-described downlink may be applied to the activation of an uplink bandwidth part for an arbitrary terminal. That is, it can be defined that the activation of a common UL bandwidth part, which is commonly applied to PUSCH and PUCCH, is supported. That is, an arbitrary terminal can be defined to be able to transmit the PUCCH and the PUSCH through all the uplink bandwidth parts activated by the base station / network. At this time, the activation of the common UL bandwidth part can be defined to be performed through MAC CE signaling or L1 control signaling. Or the corresponding common UL bandwidth part activation may be defined via UE-specific or cell-specific higher layer signaling .

Another method of activating an uplink bandwidth part for an arbitrary terminal includes the steps of activating a UL bandwidth part for any terminal in a base station / To activate a separate UL bandwidth part for each of them. That is, a bandwidth part for PUCCH transmission and a bandwidth part for PUSCH transmission are separately activated in a set of a UL bandwidth part set for an arbitrary terminal can do.

In this case, similar to the above-described method of setting the DL bandwidth part for PDCCH reception and the DL bandwidth part for PDSCH reception, a bandwidth part for any terminal in any base station / A UL bandwidth part in which PUCCH resource allocation for UCI transmission is performed and a UL bandwidth part in which PUSCH resource allocation for data transmission is performed are separately set And to activate it. However, when the UCI is piggybacked through the PUSCH, the UCI may be defined to be transmitted through the UL bandwidth part that is activated for the PUSCH transmission.

At this time, the UL bandwidth part for the PUSCH and the UL bandwidth part for the PUCCH may use the same MAC CE signaling or L1 control signaling (e.g., DL assignment DCI, UL (E.g., a grant, etc.), or may be activated via separate MAC CE signaling or L1 control signaling (e.g., DL assignment DCI, UL grant, etc.) ). ≪ / RTI >

As another method for separately activating the UL bandwidth part for PUCCH transmission and the UL bandwidth part activation for PUCCH transmission, the UL bandwidth part for PUCCH transmission includes a part Specific or cell-specific higher layer signaling or L1 control signaling or a corresponding UE-specific / cell- cell-specific higher layer signaling and L1 control signaling. The UL bandwidth part for PUSCH transmission is a UE-specific / cell-specific signaling separate from the signaling used for the UL bandwidth part activation for the PUCCH described above. -specific) higher layer signaling, MAC CE signaling, or L1 control signaling, or a combination of the corresponding signaling.

In particular, the UL bandwidth part setup and activation for PUCCH transmission may be UE-specific or cell-specific higher layer signaling for any UE (I. E., The bandwidth part in which the PUCCH resource is set is always defined as being activated at the corresponding PUCCH transmission period or timing) or < RTI ID = 0.0 > (I.e., L1 control signaling) through a PUCCH resource indication through L1 control signaling, such as DC assignment, DL assignment, DC assignment, or UL grant. The bandwidth part in which the corresponding PUCCH is transmitted may be defined as being activated at the corresponding PUCCH transmission time) have.

Also, the UL bandwidth part for PUSCH transmission is defined to include implicit or explicit UL bandwidth part allocation information for PUSCH transmission through an UL grant, and the corresponding UL grant the UL bandwidth part for PUSCH transmission may be activated through the bandwidth part allocation information included in the grant.

However, apart from the activation of the common UL bandwidth part for the PUCCH / PUSCH transmission described above, the activation of the UL bandwidth part for PRACH and SRS transmission is performed .

Specifically, in the case of UL bandwidth part activation for SRS transmission, it can be defined to follow all UL bandwidth parts activated for PUCCH transmission or PUSCH transmission of the corresponding terminal . That is, regardless of the method of activation of the PUSCH / PUCCH bandwidth part defined in the NR, all UL bandwidth parts activated for PUCCH or PUSCH transmission at any terminal It is possible to define that the corresponding terminal can transmit SRS.

In particular, a configuration is made for periodic or aperiodic SRS transmission resources for all UL bandwidth parts set for any terminal, and any bandwidth part It is defined to be capable of transmitting periodic or aperiodic SRS set or indicated via the active UL bandwidth part when activated for at least PUCCH or PUSCH transmission .

Or activation of a UL bandwidth part for PUCCH / PUSCH transmission and without activation of a separate UL bandwidth part for SRS transmission, It can be defined to allow SRS transmission through all bandwidth parts.

Or activation of the bandwidth part for SRS transmission separately from the UL bandwidth part activated for the PUSCH / PUCCH transmission in the base station / network through MAC CE signaling or L1 control signaling, Can be defined.

Or to set or activate a UL bandwidth part for SRS transmission only in the base station / network in addition to the UL bandwidth part activated for PUSCH / PUCCH transmission. That is, it is defined that an SRS transmission through an UL bandwidth part activated for PUSCH / PUCCH transmission is supported in an arbitrary terminal, and activation (or activation) for PUCCH / PUSCH transmission of the corresponding terminal in the base station / An additional UL bandwidth part can be set or activated in addition to the UL part of the UL bandwidth part to which additional SRS transmission is possible.

Or UL bandwidth part (s) capable of cell-specific SRS transmission in the base station / network in each base station / network, regardless of the UL bandwidth part setup and activation for the PUSCH / PUCCH. the bandwidth part may be separately defined by UE-specific higher layer signaling or cell-specific higher layer signaling.

Additionally, if an aperiodic SRS transmission over a PDCCH is triggered at any UE, the corresponding PDCCH may include indication information for the bandwidth part in which the aperiodic SRS transmission is performed Can be defined.

Also, in the case of UL bandwidth part activation for PRACH transmission, it is defined to follow all UL bandwidth parts activated for PUCCH transmission or PUSCH transmission or SRS transmission of the corresponding terminal. can do. That is, regardless of the method of activation of the PUSCH / PUCCH bandwidth part defined in NR and the method of activation of the bandwidth part for SRS transmission, the PUCCH / It is possible to define that the PRACH can be transmitted from the corresponding terminal through all the UL bandwidth parts activated for SRS transmission.

Or the PRACH transmission is possible over all the bandwidth parts set for any terminal regardless of the activation of the UL bandwidth part for PUCCH / PUSCH or SRS transmissions. Or a UE-specific higher layer signaling or cell (UE) -based UL bandwidth part capable of performing cell-specific PRACH transmission in each base station / - It can be defined to be set separately by higher-layer signaling (cell-specific). In addition, when the PRACH transmission for an arbitrary terminal is performed via the PDCCH, the corresponding PDCCH may be defined to include indication information on a bandwidth part in which the PRACH transmission is performed.

Cross bandwidth part scheduling and Multi-bandwidth part scheduling (Cross-bandwidth part scheduling and Multi-bandwidth parts scheduling)

The base station / network may use either single bandwidth part scheduling or multi-bandwidth parts scheduling when a plurality of DL bandwidth parts or UL bandwidth parts are configured for each terminal. scheduling can be defined.

Single bandwidth part scheduling may be performed on a PDSCH in a bandwidth part via one scheduling DCI (e.g., DL assignment DCI, UL grant, etc.) Or a PUSCH resource allocation is limited to be performed. Multi-bandwidth parts scheduling, on the other hand, is one or more bandwidth parts via one scheduling DCI (e.g., DL assignment DCI, UL grant, etc.) A PDSCH or a PUSCH resource allocation through a scheduling method.

In addition, when single bandwidth part scheduling is applied, a DL bandwidth part with the same scheduling DCI transmission and a DL or UL bandwidth part between PDSCH or PUSCH transmission is semi-fixed a linkage based bandwidth part scheduling method in which a semi-static linkage is defined and a scheduling DCI transmitted via an arbitrary DL bandwidth part. Cross bandwidth part scheduling, which dynamically supports PDSCH or PUSCH transmission resource allocation via a UL bandwidth part, can be defined and defined to be set up in the base station / network .

The above settings may be set via higher layer signaling, or via MAC CE signaling or L1 signaling.

Cross bandwidth part scheduling

When a plurality of DL bandwidth parts are activated for an arbitrary terminal and a plurality of DL bandwidth parts for PDSCH transmission and reception are activated, a PDSCH transmission for the corresponding terminal A definition of a linkage between a DL bandwidth part and a DL bandwidth part in which a PDCCH transmission including scheduling control information for a corresponding PDSCH is performed is required.

The present embodiment proposes a method of cross bandwidth part scheduling in which a PDSCH transmission for an arbitrary UE and a PDCCH transmission including scheduling control information for the PDSCH are performed through different bandwidth parts do.

For this purpose, when a DL bandwidth part for an arbitrary terminal is set in a base station / network, a bandwidth part indication field (BIF, Bandwidth part) is allocated to each DL bandwidth part through a higher layer signaling, (E.g., MAC CE signaling or L1 control signaling) at the time of activation for an arbitrary DL bandwidth part, as shown in FIG. It can be defined to set the Bandwidth part Indication Field (BIF) value for each DL bandwidth part.

Likewise, for a UL bandwidth part, when a UL bandwidth part set for each UL bandwidth part or a PUSCH or PUCCH transmission in a base station / network is set to a higher layer signaling, (Bandwidth Part Indication Field) value for each UL bandwidth part through the UL bandwidth part, or a corresponding activation signaling (for example, when activating an arbitrary UL bandwidth part) (Bandwidth part Indication Field) value for each UL bandwidth part through MAC CE signaling or L1 control signaling.

Accordingly, when cross bandwidth part scheduling is supported, the DL assignment DCI or UL grant for the corresponding terminal includes the above-described BIF indication information area. However, the cross bandwidth part scheduling can be defined by the base station / network to be configurable through higher layer signaling and MAC CE signaling for each MS. In this case, the cross bandwidth scheduling the DL assignment DCI or UL grant for the corresponding terminal may include the BIF indication information area described above only when cross bandwidth part scheduling is set.

If cross bandwidth part scheduling is not applied, the PDCCH including any DL assignment DCI and the corresponding PDSCH are transmitted via the same DL bandwidth part . Also, in the case of a UL bandwidth part, it is possible to use a higher layer signaling for establishing a respective UL bandwidth part in a base station / network, or via activation of an UL bandwidth part A DL bandwidth part in which transmission is performed for PDCCH including PUSCH transmission resource allocation information in a corresponding UL bandwidth part, i.e., UL grant, through MAC CE signaling or L1 control signaling for UL grant, It can be defined to transmit instruction information.

Or conversely, via higher layer signaling for each DL bandwidth part (or a DL bandwidth part for PDCCH transmission) setup in the base station / network, or via a DL bandwidth part ) Or for each PUSCH or PUCCH or PRACH or SRS transmission by each DL bandwidth part via MAC CE signaling or L1 control signaling for activation (or DL bandwidth part for PDCCH transmission) And may be defined to transmit a UL bandwidth part indication that has become a linkage.

Specifically, the linkage indication information of the UL bandwidth part for each DL bandwidth part is transmitted by a PUSCH transmission indicated by an UL grant transmitted through each DL bandwidth part. And UL bandwidth part indication information indicating transmission of UL bandwidth part indication information and UCI or PRACH or SRS triggered through the corresponding DL bandwidth part.

Multi-bandwidth parts scheduling

It is defined to support multi-bandwidth parts scheduling where PDSCH or PUSCH transmissions for any terminal are made through multiple DL bandwidth parts or a plurality of bandwidth parts, respectively, in the same time period. can do. The corresponding multi-bandwidth parts scheduling may be set by the base station by UE-specific higher layer signaling or MAC CE signaling or L1 control signaling for each UE have.

Or multi-bandwidth parts scheduling may be used to provide multiple DL bandwidth parts (or a DL bandwidth part for multiple PDSCH transmissions) or multiple UL bandwidth parts may be defined to be set implicitly when a bandwidth part (or a UL bandwidth part for multiple PUSCH transmissions) is set or activated.

Accordingly, when multi-bandwidth parts scheduling is set in an arbitrary terminal, a DL assignment DCI or UL grant for the corresponding terminal is set or activated for PDSCH or PUSCH transmission / reception based indication area for each DL / UL bandwidth part that has been activated. The bits constituting the bitmap for indicating the corresponding DL or UL bandwidth part are respectively mapped 1: 1 to one DL bandwidth part or UL bandwidth part, And to indicate whether a PDSCH or PUSCH resource is allocated through a bandwidth part or a UL bandwidth part.

Accordingly, any DL bandwidth part or UL bandwidth part can be allocated to a bitmap information area included in a DL assignment DCI or UL grant for any terminal The frequency resource (PRB unit or RBG unit) allocation information area and the time domain resource allocation information area of the corresponding DL assignment DCI or UL grant are allocated to the designated DL bandwidth It can be defined to be common to the part (bandwidth part) or the UL bandwidth part (bandwidth part).

Or the corresponding multi-bandwidth parts scheduling may be applied in the form of bandwidth parts aggregation. That is, a plurality of DL bandwidth parts or a plurality of UL bandwidth parts can be allocated to a plurality of DL bandwidth parts or a plurality of UL bandwidth parts set for an arbitrary terminal, Is activated and a plurality of DL bandwidth parts or a plurality of UL bandwidth parts of the corresponding activated DL bandwidth part or UL bandwidth part The bandwidth parts aggregation can be defined to be set by the base station / network.

In this case, the PRB assignment information area included in the DL assignment DCI or UL grant for the corresponding UE is allocated to all the DL bandwidth parts or the UL bandwidth May be defined by the base station based on the PRBs included in the bandwidth part and interpreted by the terminal.

At this time, one TB (in the case of single codeword scheduling) or two or more TBs (in the case of multiple codeword scheduling) allocated through one DCI is allocated to the PRB assignment information And may be transmitted over the corresponding multiple DL or UL bandwidth parts. The corresponding bandwidth parts aggregation may be established by UE-specific higher layer signaling, MAC CE signaling or L1 control signaling by the base station / network.

In addition, if a bandwidth parts aggregation for any terminal is applied, the scheduling of the PDSCH or PUSCH for the corresponding aggregated DL bandwidth part or UL bandwidth part, A method of cross bandwidth part scheduling may be applied.

That is, a DL bandwidth part linkage in which PDSCH or PUSCH scheduling control information transmission is performed for the corresponding aggregated DL bandwidth part or an aggregated UL bandwidth part, Information is set up in the base station / network, or when setting up the bandwidth parts aggregation, one BIF value is allocated for the aggregated bandwidth part by the base station / network, , The corresponding BIF value can be indicated through the DCI.

Example 1. Downlink Bandwidth Part Switching (DL BWP (Bandwidth Part) switching)

Specifically, N downlink bandwidth parts (DL bandwidth part (s)) may be set in any serving cell configured for any terminal as shown in FIG. 4 below. However, N is an arbitrary natural number, and the present invention is not limited by the concrete N value. In addition, although FIG. 4 is configured so as not to overlap in the frequency axis between the respective BWPs, a BWP configuration may be made such that it overlaps partially or wholly in the frequency axis between arbitrary BWPs.

When N DL BWPs are set for a corresponding UE in an arbitrary serving cell configured for an arbitrary UE, the DL BWP switching indication information for the corresponding UE is transmitted as scheduling downlink control information (scheduling DCI) Lt; / RTI >

Specifically, DL BWP switching may be indicated through a DL assignment DCI including resource allocation information for the PDSCH. For this purpose, a DL assignment DCI format configured to be monitored by an arbitrary UE includes a DL BWP indication field (DL BWP indication field) for DL BWP switching BIF, but the present embodiment is not limited by its name).

As a method of constructing the DL BIF, the DL BIF is configured as a bitmap of N bits according to the number of DL BWPs configured for the corresponding terminal in an arbitrary serving cell as shown in FIG. 4, Can be defined to transmit DL BWP activation (or DL BWP switching) indication information via an indication. Alternatively, the DL BIF may be defined to indicate a BWP index that is configured and activated with log ₂ (N) bits as another configuration method of the DL BIF. Or log ₂ (N + 1) bits to indicate a newly activated BWP index in BWP switching, as well as indicating non-switching (i.e., current active BWP) (For example, when all of the log ₂ (N + 1) bits are '0'). Or the number of DL BWP is configured for the UE, according to N, N = the log ₂ (N + 1) bits BIF is configured, if a <3, in the case of N = 4 can be defined such that log ₂ (N) bits configuring have.

As another method of configuring the DL BIF, the DL BIF can be defined by the Nmax value, which is the maximum number of DL BWPs that can be set in any serving cell, regardless of the actual number of DL BWPs set for each UE. For example, according to the Nmax value, the DL BIF is configured with a bitmap of Nmax bits to transmit DL BWP activation (or DL BWP switching) indication information through a bitmap-based indication Can be defined. Alternatively, DL BIF may be defined to indicate a BWP index that is configured and activated with log ₂ (Nmax) bits as another method of configuring the DL BIF. Or DL BIF is configured with log ₂ (Nmax + 1) bits to indicate the BWP index to be newly activated upon BWP switching, as well as to indicate non-switching (i.e., maintain current active BWP) (e.g., when both the log ₂ (N + 1) bits are '0').

However, whether or not the DL BIF is included in the DL assignment DCI format configured to be monitored at a certain UE can be implicitly or explicitly set by the BS / network. Specifically, as an implicit setting method, it is possible to define whether DL BIF is included or not by the number of DL BWPs configured in an arbitrary serving cell, and the N value. For example, when the number of DL BWPs set for an arbitrary terminal is N = 1, the DL assignment DCI format set to be monitored by the corresponding terminal does not include the DL BIF. If N => 2, The DL assignment DCI format set to monitor can be defined to include the DL BIF. Alternatively, the DL assignment DCI format or the DL assignment DCI size may be defined to determine whether to include the DL BIF. That is, it is possible to define that the DL BIF is included only for the DCI format 1_0, which is the DCI format to be monitored by the UE in order to receive the PDSCH scheduling control information, and the DCI format 1_1 of the DCI format 1_1, . Or whether to include the DL BIF in a search space (for example, a Common Search Space vs. a UE-specific Search Space or a search space composed of PDCCH candidates of an arbitrary aggregation level or the like) .

Specific RRC signaling (UE-specific RRC signaling) by setting whether DL BIF is included in each DL-DCI format for each UE in the Node B / Lt; / RTI &gt; Or a search space (for example, a common search space vs. a UE-specific search space, or a search space including PDCCH candidates at an aggregation level or higher, etc.) ) May be defined to transmit the UE-specific RRC signaling by setting whether the DL BIF is included or not. Alternatively, the inclusion of the DL BIF may be set as a combination of the above-mentioned implicit or explicit setting methods.

If the inclusion of the DL BIF is implicitly or explicitly set by the base station / network for any DL assignment DCI format set to be monitored by any terminal, the DL that does not include the DL BIF The PDSCH resource allocation information through the assignment DCI format can be interpreted by the UE as PDSCH resource allocation information in the same DL BWP as the DL BWP to which the corresponding DL assignment DCI is transmitted.

In addition, DL BWP switching over the DCI that does not include scheduling information for the PDSCH may be supported. In this case, the corresponding DL BWP switching may be instructed by the base station / network through the DL assignment DCI format including the DL BIF or through the same DCI size transmission as the corresponding DCI format. For example, for any DL assignment DCI format that includes a DL BIF defined to monitor at any UE, if a DL assignment DCI format is used only for DL BWP switching without PDSCH scheduling, (For example, all '0') of all the information areas except for the DL BIF among the information areas and some information areas (for example, the MCS field and / or the PRB allocation field) May only be defined for the DL BWP switching, not including the scheduling information for the PDSCH, and interpreted at the terminal.

Alternatively, in defining the DL assignment DCI format, a separate information area for indicating the use of the DCI may be defined and included in the DL assignment DCI format. An information field for indicating the use of the DCI is an information field for indicating whether PDSCH scheduling is to be performed (for example, a 1-bit indication field for indicating PDSCH scheduling information inclusion or non-inclusion) field) or an information area (for example, a 1-bit indication field for indicating DL BWP switching or non-switching) for indicating whether to switch the DL BWP, Or the two pieces of information may be defined to include both jointly encoded data and separately encoded data. For example, it may be an information region for indicating DL BWP switching with PDSCH scheduling or PDBCH switching without PDSCH scheduling, together with PDSCH scheduling. Or an information area for indicating one of three statuses including PDSCH scheduling without DL BWP switching (PDSCH scheduling without DL BWP switching) in the above two statuses.

Hereinafter, specific points related to downlink bandwidth part switching (DL BWP switching) will be described.

As described above, when DL BWP switching is instructed through the DL assignment DCI, the currently activated DL BWP is deactivated, and when the DL BWP indicated through the DL assignment DCI is activated You need to define. In particular, in the DL BWP switching, it is necessary to minimize the ambiguity of the BWP switching timing between the UE and the base station for PDCCH transmission and reception. In this embodiment, the following three methods for defining the DL BWP switching timing are proposed for this purpose.

1. PDCCH Reception Timing Based Approach (PDCCH)

When downlink bandwidth part switching (DL BWP switching) for an arbitrary terminal is instructed through the DCI by the above-described methods, the corresponding terminal and the base station may use a slot based on which a PDCCH including the DCI is transmitted and received The downlink bandwidth part switching time (DL BWP switching time) of the UE can be derived. That is, when DL BWP switching is instructed through a DL assignment DCI (the DL assignment DCI may not include the PDSCH scheduling control information as described above) in an arbitrary nth slot #n, From the slot # (n + k) after the k slot, the existing DL BWP is deactivated and the new DL BWP indicated by the DL assignment DCI can be activated.

According to an example, the k value may be set by the base station / network and transmitted via UE-specific higher layer signaling. Alternatively, the k value may be sent via L1 control signaling (e.g., the DCI that transmits the corresponding DL BWP switching indication). Alternatively, the k value may have any fixed value, or may be determined by the capability of the terminal. However, when the bandwidth part switching time (BWP transition time) is determined by the capability of the terminal, each terminal can report a corresponding capability value for setting the BWP switching time to the network.

In contrast to the above, the UE may not receive the PDCCH or PDSCH through the existing DL BWP during the DCI reception time including the BWP switching indication information and the corresponding BWP switching time. Alternatively, whether the PDCCH or PDSCH can be received through the existing BWP during the BWP switching time can be set by the base station through RRC signaling, MAC CE signaling, L1 control signaling, or by terminal capability. In this case, the terminal can also report the capability to the network.

In addition, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PDSCH reception time point, (For example, k0 value) does not guarantee the BWP switching time related capability indicated by the terminal, that is, the k0 value is smaller than the BWP switching time related capacity indicated by the terminal, The BWP switching according to the instruction may not be performed.

2. Schedule PDSCH reception timing based approach (scheduled PDSCH reception timing based approach)

When downlink bandwidth part switching (DL BWP switching) for an arbitrary terminal is instructed through the DL assignment DCI according to the above-described methods, the corresponding terminal and the base station transmit the DL assignment DCI The DL BWP switching time of the corresponding UE can be derived based on the PDSCH transmission time set through the RRC signaling. That is, when the DL BWP switching is instructed through the DL BIF included in the DL assignment DCI including the PDSCH scheduling control information for an arbitrary UE, the PDSCH transmission / reception slot indicated by the corresponding DL assignment DCI or set by the RRC signaling a DL BWP switching time may be defined based on a slot (the first slot in which a PDSCH transmission / reception starts according to PDSCH resource allocation for a plurality of slots through the corresponding DL assignment DCI).

Specifically, time domain PDSCH resource allocation information (for example, timing gap between a DL assignment DCI and a PDSCH transmission / reception timing) transmitted from an arbitrary UE that has received a DL assignment DCI through an arbitrary nth slot #n (n + k1) according to the timing relationship setting information between the DL assignment set by the RRC signaling and the PDSCH transmission set in the slot # the DL BWP switching can be performed in the slot # (n + k1-k2) which is before the arbitrary k2 slot based on n + k1. For example, if k2 = 0, it is possible to deactivate the existing DL BWP from the PDSCH transmission slot and define the new DL BWP indicated by the DL assignment DCI to be activated.

However, the value k2 may be set by the base station / network and transmitted through UE-specific higher layer signaling, or may be L1 control signaling (e.g., DCI which transmits the corresponding DL BWP switching indication information) ), Or may have any fixed value, or may be determined by the capabilities of the terminal. However, when the BWP switching time is determined by the capability of the terminal, each terminal can report the capability value for setting the BWP switching time to the network.

In contrast to the above, the UE defines the PDCCH or the PDSCH through the existing DL BWP not to be received during the DCI reception time including the BWP switching indication information and the corresponding BWP switching time, or the PDCCH or the PDSCH through the existing BWP during the BWP switching time Or whether PDSCH reception is possible is established by the base station through RRC signaling, MAC CE signaling, L1 control signaling, or by terminal capability, which may also report the capability in the terminal to the network.

3. The HARQ ACK / NACK feedback timing-based approach of the UE

When downlink bandwidth part switching (DL BWP switching) for an arbitrary terminal is instructed through the DCI by the above-described methods, the corresponding terminal and the base station transmit the PDSCH, which is indicated through the DL assignment DCI or RRC signaling, The DL BWP switching time of the corresponding UE can be derived based on the HARQ ACK / NACK feedback time for reception. In this case, the HARQ ACK / NACK feedback of the corresponding terminal can also be utilized for confirming the DL BWP switching instruction through the DL assignment DCI of the base station. Specifically, when the DL BWP switching is instructed by the DL assignment DCI including the PDSCH scheduling control information for an arbitrary UE, the PUCCH transmission slot for the HARQ ACK / NACK feedback of the UE indicated by the DL assignment DCI However, if a plurality of slot-based PUCCH transmissions are set or indicated in the corresponding terminal, the DL BWP switching time may be defined based on the last PUCCH transmission slot).

Specifically, any UE that has received a DL assignment DCI through an arbitrary n-th slot #n transmits time domain PDSCH resource allocation information (for example, DL assignment DCI, (N + k3), and the time domain PUCCH resource allocation information for the HARQ ACK / NACK feedback transmission of the UE (e.g., timing gap setting information between PDSCH transmission and reception) (N + k3 + k4) is a slot # (n + k3 + k4) when the PUCCH transmission slot according to the PDSCH reception of the UE and the timing gap setting information between the HARQ ACK / DL BWP switching can be performed in slot # (n + k3 + k4 + k5) which is a slot after k5. For example, if k5 = 1, the existing DL BWP is deactivated from the next slot of the slot in which the HARQ ACK / NACK feedback of the UE is made, and the new DL BWP indicated by the DL assignment DCI is activated .

The value k5 may be set by a base station / network and transmitted through a UE-specific higher layer signaling, or may be L1 control signaling (e.g., DCI for transmitting the corresponding DL BWP switching indication information) ), Or may have any fixed value, or may be determined by the capabilities of the terminal. However, when the BWP switching time is determined by the capability of the terminal, each terminal may report a capability value for setting the BWP switching time to the network.

In contrast to the above, the UE defines the PDCCH or the PDSCH through the existing DL BWP not to be received during the DCI reception time including the BWP switching indication information and the corresponding BWP switching time, or the PDCCH or the PDSCH through the existing BWP during the BWP switching time Or whether the PDSCH can be received is set by the base station through RRC signaling, MAC CE signaling, or L1 control signaling, or is determined by the terminal capability, which may also report the capability to the network at the terminal.

If the DL assignment DCI does not include the PDSCH scheduling control information, the UE calculates the PUCCH transmission time from the corresponding DCI reception time including only the DL BWP switching information (i.e., the PDSCH reception time slot set by DCI or RRC signaling) And timing gap information between a PUCCH / PUSCH transmission slot including HARQ ACK / NACK feedback information corresponding to the timing gap information and a timing gap information from a DCI reception time including DL BWP switching information, To calculate the PUCCH transmission time), perform HARQ ACK feedback, and determine the DL BWP switching slot based on the HARQ ACK feedback applied slot. Similarly, when receiving the DL DCI including only the BWP activation / deactivation indication information excluding the scheduling control information, i.e., the active BWP switching indication information, the UE transmits the DL DCI according to the HARQ ACK / NACK feedback timing described above Perform HARQ ACK feedback, and perform BWP switching according to the PDCCH reception timing based approach or the schedule PDSCH reception timing based approach described above.

In addition, any DL assignment DCI and its corresponding PDSCH transmissions may be constrained to occur in the same DL BWP. That is, the DL BIF information included in the DL assignment DCI is interpreted to instruct the DL BWP switching in the corresponding UE, and the PDSCH resource allocation information included in the DL assignment DCI is interpreted as the PDSCH resource allocation in the DL BWP in which the DL assignment DCI is transmitted Can be defined.

Example 2. Uplink bandwidth part switching (UL BWP (Bandwidth Part) switching)

Similar to the DL BWP setup described above, M uplink bandwidth parts (UL bandwidth part (s)) may be set in any serving cell configured for any terminal, similar to FIG. However, M is an arbitrary natural number, and the present invention is not limited by a specific M value, and N, which is the number of DL BWPs and M, which is the number of UL BWPs, may be the same or different. In addition, although FIG. 4 is configured not to overlap in the frequency axis between the respective BWPs, a BWP configuration may be made such that the frequency axis overlaps partially or wholly in the frequency axis between arbitrary BWPs.

If M UL BWPs are set for a corresponding serving cell in an arbitrary serving cell, the UL BWP switching indication information for the corresponding UE can be transmitted through the scheduling DCI as described above.

Specifically, the UL BWP switching may be indicated through the UL grant DCI including the resource allocation information for the PUSCH. For this purpose, a DL assignment DCI format configured to be monitored by an arbitrary UE includes an UL BWP indication field (UL BWP indication field) for UL BWP switching BIF, but the present embodiment is not limited by its name). Or UL BWP switching may be indicated via a DL assignment DCI that includes resource allocation information for the PDSCH. In this case, the PUCCH resource allocation information for the HARQ ACK / NACK feedback of the PDSCH for the UE may be defined to include the UL BIF.

As a method of constructing UL BIF, UL BIF is configured with M bits according to the number of UL BWPs configured for a corresponding terminal in an arbitrary serving cell, and a bitmap-based indication ) To transmit UL BWP activation (or switching) indication information. Alternatively, UL BIF may be defined as an alternate method of configuring an UL BIF to indicate an UL BWP index (index) that is composed of log ₂ (M) bits and is activated. (I.e., the current active UL BWP), which is configured with a log ₂ (M + 1) bit to indicate a newly activated UL BWP index upon UL BWP switching, (E.g., when the log ₂ (M + 1) bits are both '0') for the corresponding bitstream (e.g., retention). Or the number of UL BWP is configured for the UE, it may be defined to be in accordance with M M = <3 in case the log ₂ (N + 1) bits BIF is configured, M = 4 in the case log ₂ (N) bits configuring .

As another method of configuring the UL BIF, the UL BIF can be defined by an Mmax value which is the maximum number of UL BIFs that can be set in any serving cell regardless of the actual number of UL BIFs set for each UE. For example, according to the Mmax value, the UL BIF may be configured with a bitmap of Mmax bits to define UL BWP activation (or UL BWP switching) indication information via a bitmap-based indication . Alternatively, UL BIF may be defined to indicate a BWP index that is configured and activated with log ₂ (Mmax) bits as another method of configuring UL BIF. Or log ₂ (Mmax + 1) bits to indicate a newly activated BWP index in BWP switching, as well as to indicate non-switching (i.e., maintaining the current active BWP) (E.g., when both the log2 (N + 1) bits are '0').

However, whether or not the UL BIF is included in the UL grant DCI format that is set to be monitored by an arbitrary UE may be explicitly set implicitly or explicitly by the BS / . Specifically, as an implicit setting method, whether the UL BIF is included or not can be determined by the number of UL BWPs configured in any serving cell, M value. For example, when the number of UL BWPs set for an arbitrary terminal is M = 1, the UL grant DCI format set to be monitored by the corresponding terminal does not include the UL BIF. If N => 2, The UL grant DCI format set to monitor may include the UL BIF.

Or the type or type of the UL grant DCI format or the UL grant DCI size may determine whether to include the UL BIF. That is, the UL BIF can be included only for the DCI format 0_0, which is a DCI format to be monitored by the UE to receive the PUSCH scheduling control information, and the DCI format 0_1 among the DCI format 0_1, for the UE having one or more bandwidth parts. Or whether the UL BIF is included in the search space (for example, a Common Search Space vs. a UE-specific Search Space or a search space composed of PDCCH candidates at an aggregation level or higher, etc.) monitored by the corresponding UE.

Specific RRC signaling by setting whether the UL BIF is included in the UL grant DCI format set for monitoring in each base station / network or each terminal in the base station / network. Or a search space (for example, a common search space vs. a UE-specific search space, or a search space including PDCCH candidates at an aggregation level or higher, etc.) ) May be transmitted through UE-specific RRC signaling by setting whether UL BIF is included or not. Alternatively, the inclusion of the UL BIF may be set as a combination of the implicit or explicit setting methods described above.

If the UL BIF is included implicitly or explicitly by the base station / network for any UL grant DCI format set to be monitored by any UE, UL grant DCI including no UL BIF format can be interpreted by the UE as PUSCH resource allocation information through the UL BWP in an active state in the slot that received the UL grant DCI. Or PUSCH resource allocation information through the UL BWP that is active in the PUSCH transmission slot through the UL grant. Specifically, UL BWP switching can be instructed between the UL grant DCI transmission slot and the PUSCH transmission slot by the UL grant DCI. In this case, the terminal interprets the PUSCH resource allocation information of the UL grant DCI as a PUSCH transmission resource in the UL BWP that is active in the UL grant DCI reception time / slot and transmits the PUSCH accordingly, or It can reinterpret as a PUSCH transmission resource in the active UL BWP in the PUSCH transmission point / slot according to the UL grant DCI and transmit the PUSCH accordingly.

In addition, UL BWP switching over the DCI that does not include scheduling information for the PUSCH may be supported. In this case, UL BWP switching may be indicated by the base station / network through the UL grant DCI format including the UL BIF or through the same DCI size transmission as the UL grant DCI format. For example, for any UL grant DCI format that includes an UL BIF defined to monitor at any UE, if the UL grant DCI format is used only for UL BWP switching without PUSCH scheduling, By setting all of the information areas except for the UL BIF, or a part of the information areas (e.g., MCS field and / or PRB allocation field) of the information area to a specific value (for example, all '0' The grant DCI may be defined to be interpreted at the terminal only for UL BWP switching, not including the scheduling information for the PUSCH.

Alternatively, in defining the UL grant DCI format, a separate information area for indicating the use of the DCI may be defined and included in the UL grant DCI format. An information field for indicating the use of the DCI is an information field for indicating whether the PUSCH scheduling is to be performed (for example, a 1-bit indication field for indicating PUSCH scheduling information inclusion or non-inclusion) Or a 1-bit indication field for indicating UL BWP switching or non-switching) for indicating whether the UL BWP is to be switched, or an information area (e.g., a 1-bit indication field for indicating UL BWP switching or non- It can be defined to include both joint encoded and separately encoded. For example, it may be an information region for indicating one of UL BWP switching with PUSCH scheduling with UL PUSCH or UL BWP switching without PDSCH scheduling with PUSCH scheduling. Or an information region for indicating one of three statuses, including PUSCH scheduling without UL BWP switching (PUSCH scheduling without UL BWP switching) in the above two statuses.

Hereinafter, specific points related to UL BWP switching will be described.

As described above, when the UL BWP switching is instructed through the UL grant DCI, it is necessary to deactivate the currently activated UL BWP and define the point at which the indicated UL BWP is activated. Do.

1. PDCCH Reception Timing Based Approach (PDCCH)

When uplink bandwidth part switching (UL BWP switching) for an arbitrary terminal is instructed through the DCI by the above-described methods, the corresponding terminal and the base station transmit a slot through which the PDCCH including the corresponding DCI is transmitted and received (UL BWP switching time) of the uplink bandwidth of the UE. That is, when UL BWP switching is instructed through an UL grant DCI in an arbitrary n-th slot #n (however, the UL grant DCI may not include PUSCH scheduling control information as described above) From the slot # (n + j) after the slot, the existing UL BWP is deactivated and the new UL BWP indicated by the UL grant DCI can be activated. Where the value of j may be set by the base station / network and transmitted via UE-specific higher layer signaling. Or the j value may be sent via an L1 control signaling (e.g. DCI transmitting UL BWP switching indication). Alternatively, the value of j may have any fixed value, or may be determined by the capability of the terminal. However, when the bandwidth part switching time (BWP transition time) is determined by the capability of the terminal, each terminal may report a capability value for setting the BWP switching time to the network.

In contrast to the above, the UE may not transmit the PUSCH or the PUCCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the BWP switching time according to the DCI reception time. Or whether the PUSCH or PUCCH transmission through the existing BWP is possible during the BWP switching time is set by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or may be determined by the terminal capability. This can also report the capability in the terminal to the network.

Also, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PUSCH transmission time point If the value of k2 is smaller than the BWP switching time related capability indicated by the terminal, the UE determines whether the value of the corresponding DCI The BWP switching according to the instruction may not be performed.

2. Scheduled PUSCH transmission timing based approach

When UL BWP switching is instructed for an arbitrary terminal through the UL grant DCI according to the above-described methods, the corresponding terminal and the base station transmit the PUSCH transmission time indicated through the UL grant DCI or through the RRC signaling The UL BWP switching time of the UE can be derived. That is, when the UL BWP switching is instructed through the UL BIF of the UL grant DCI including the PUSCH scheduling control information for an arbitrary UE, the PUSCH transmission / reception slot indicated by the UL grant DCI or through the RRC signaling, The UL BWP switching time can be determined based on the first slot in which the PUSCH transmission / reception is started when the PUSCH resource allocation for a plurality of slots is performed through the UL grant DCI).

Specifically, time domain PUSCH resource allocation information (for example, timing gap between an UL grant and a PUSCH transmission / reception) transmitted through an UL grant DCI at an arbitrary UE that has received an UL grant DCI through an nth slot #n (N + j1) according to the timing relationship setting information between the UL grant set by the RRC signaling and the PUSCH transmission set by the RRC signaling, the slot # (n (n + j1-j2), which is before j2 slots, based on the value of + j1, the corresponding DL BWP switching can be performed. For example, if j2 = 0, the existing UL BWP may be deactivated from the PUSCH transmission slot and the new UL BWP indicated by the UL grant DCI may be activated. In this case, the PUSCH resource allocation information by the UL grant can be interpreted as the PUSCH resource allocation information in the newly activated UL BWP.

Alternatively, the UL BWP switching may be performed in the slot # (n + j1 + j2) that is after the arbitrary j2 slot based on the slot # (n + j1) which is the PUSCH transmission slot. For example, if j2 = 1, then UL BWP switching may be done in the next slot of the slot where the PUSCH transmission was made. In this case, the PUSCH transmission resource allocation information through the UL grant can be interpreted by the UE based on the existing UL BWP, and the base station confirms reception of the UL BWP switching information through the PUSCH reception through the existing UL BWP )can do. In this case, if a PUSCH transmission resource allocation is performed through a plurality of slots through an UL grant, slot # (n + j1) may be defined as the last slot in which PUSCH transmission is performed, as opposed to the above.

Also, the j2 value may be set by the base station / network and transmitted via UE-specific higher layer signaling, or may be transmitted via L1 control signaling (e.g., DCI that transmits the corresponding DL BWP switching indication information) , Or may be determined by the capability of the terminal. However, when the BWP switching time is determined by the capability of the terminal, each terminal may report a capability value for setting the BWP switching time to the network.

In contrast to the above, the UE may not transmit the PUSCH or the PUCCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the BWP switching time according to the DCI reception time. Or whether the PUSCH or PUCCH transmission through the existing BWP is possible during the BWP switching time is established by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or is determined by the terminal capability, You can report to the network.

In addition, when a 1: 1 association is established between DL BWP and UL BWP, DL BWP or UL BWP switching is instructed via DL assignment DCI or UL grant DCI, respectively, according to the above-described method, Time and UL BWP conversion time can be applied. However, in this case the associated DL BWP or UL BWP switching may also be the same. That is, when the DL BWP switching is indicated by the DL assignment DCI, the DL BWP switching time is defined by the above-described method, so that the DL BWP switching as well as the UL BWP switching associated with the DL BWP are performed Conversely, if UL BWP switching is indicated by an UL grant, the UL BWP transition time can be defined by the above-described method, and thus UL BWP switching as well as associated DL BWP switching can be defined.

However, the above-mentioned BWP transition time may be referred to as another term such as a BWP switching delay, and the present embodiment is not limited by its name.

In the first and second embodiments of the present invention described above, the terminal transmits the capability value of the terminal to the base station in order to switch the bandwidth part used between the terminal and the base station, and according to the capability value of the terminal A BIF indicating a bandwidth part to be newly activated is received from the base station and the data channel is transmitted / received through the bandwidth part activated by the BIF.

In the above-described first and second embodiments, the technical idea is described based on two nodes of the terminal and the base station. However, this is for the sake of understanding, and the same technical idea can be applied between the terminal and the terminal. That is, the technical idea may be applied not only to the communication between the terminal and the base station but also to the device to device, the side link communication (Sidelink), the vehicle communication (V2X) and the like. In particular, the present invention can be applied to inter-terminal communication in the next generation radio access technology, and the terms such as signal and channel in the present specification can be variously modified and applied according to the type of communication between terminals.

Therefore, in order to switch the bandwidth part used between the terminal and another terminal, the terminal according to the present invention transmits the capability value of the terminal to another terminal and instructs the bandwidth part to be newly activated according to the capability value of the terminal From the other terminal and transmit / receive the data channel to / from the other terminal through the bandwidth part activated by the BIF.

5 is a diagram illustrating a procedure for a terminal to switch a bandwidth part by reflecting a traffic load of a terminal in the present embodiment.

Referring to FIG. 5, a mobile station may transmit physical layer capability information including a bandwidth part (BWP) switching delay type information (S500).

The terminal can receive bandwidth part (BWP) setting information from the base station. The terminal may receive BWP configuration information from the base station via higher layer signaling (e.g., RRC signaling). The BWP configuration information is information on a bandwidth part set that includes one or more bandwidth parts configured for the terminal. According to one example, the BWP configuration information may include index information indicating each bandwidth part of the bandwidth part set. In another example, the BWP part setup information may further include a subcarrier spacing (SCS) information and a cyclic prefix (CP) for each bandwidth part of the above-described bandwidth part set.

Each bandwidth part of the bandwidth part set may be constituted by common resource block indexing information for the component carriers configured by the base station. Where the component carriers may be narrowband (NB) or wideband (WB) component carriers and may refer to one or more component carriers that comprise carrier aggregation (CA).

Specifically, the configuration information for each bandwidth part of the above-mentioned bandwidth part may include a starting RB index based on the above-described common resource block indexing information, that is, the starting point of the bandwidth part. This starting physical resource block index can be expressed in RB index units based on the common resource block indexing. The configuration information for each bandwidth part may further include start resource block index information based on the common resource block indexing information and size information of the corresponding bandwidth part.

The downlink data channel or the uplink data channel may be transmitted or received between the terminal and the base station through one of the bandwidth parts included in the bandwidth part set configured in the terminal according to the received bandwidth part setting information. In this case, the bandwidth part being used for transmission or reception of the data channel may be converted to another bandwidth part included in the same bandwidth part set, if necessary.

One initial DL bandwidth part may be set for monitoring CORESET in the common search space of the Type 0-PDCCH among the DL bandwidth parts configured at the UE. In addition, one initial UL bandwidth part for random access among the UL bandwidth parts configured at the terminal can be set.

According to one example, the initial DL bandwidth part and the initial UL bandwidth part may be determined based on the frequency information of the detected SS block (SS Block) when the terminal detects an SS block (SS Block) transmitted from the base station have. In the initial access phase, the first DL Bandwidth Part and the UL Bandwidth Part are activated, and then the DL Data Channel is received from the base station after the DL Bandwidth Part and the UL Bandwidth Part for the UE are established, The bandwidth part for transmitting the channel can be switched.

According to one example, the bandwidth part switching delay (BWP switching delay), which is the time taken to convert a bandwidth part used for transmitting and receiving a data channel to another bandwidth part, can be determined by the capability of the terminal. Depending on the capacity of the terminal, the terminal may be classified into any one of a predetermined bandwidth part switching delay type divided into at least two types. The MS may transmit physical layer capability information including switching delay type information determined by the capability of the MS to the BS for effective switching of the bandwidth part.

That is, if downlink bandwidth part switching (DL BWP switching) is instructed through the DCI, the UE receives the downlink bandwidth part switching time (DL BWP switching time) of the UE based on the slot on which the PDCCH including the DCI is received, Can be derived. According to one example, depending on the derived bandwidth part switching time, the switching delay type of the terminal may be determined.

For example, in a (n + k) th slot where k slots have elapsed, the PDCCH including the DCI is received at an arbitrary nth slot, the existing active DL BWP is deactivated and the DL assignment DCI Lt; RTI ID = 0.0 &gt; BWP &lt; / RTI &gt; In this case, according to an example, the BWP transition time k for switching the downlink bandwidth part may be determined by the capability of the terminal.

In this manner, when the BWP switching time is determined by the capability of the terminal, the terminal can be configured to transmit the capability value of the terminal to the BWP switching time to the base station.

In the above description, the capability value of the terminal is transmitted to the base station in order to switch the bandwidth part used for communication between the terminal and the base station. However, the present invention is not limited to this. According to an example, a terminal may transmit a capability value of a terminal to another terminal in order to switch a bandwidth part used for communication with another terminal.

5, the UE may receive downlink control information including scheduling information on a bandwidth part indication field and a data channel determined by reflecting the traffic load of the UE (S510).

The UE can receive the downlink data channel from the base station or transmit the uplink data channel to the base station through one bandwidth part indicated by the downlink control information (DCI) received from the base station. According to one example, the bandwidth part indicated by the bandwidth part indicator field (BIF) may be set to one at a specific time step. According to an example, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the UE can be set up to N (N is a natural number equal to or greater than 1), respectively. However, as an example, the number of DL bandwidth parts and the number of UL bandwidth parts may be set differently.

Among the bandwidth parts included in the bandwidth part set configured in the UE, the BIF indicating the bandwidth part to be used for transmission / reception of the data channel can be transmitted through the scheduling DCI.

According to an example, downlink BWP switching may be indicated through a DL assignment DCI including resource allocation information for a downlink data channel (PDSCH). In this case, the DL assignment DCI format configured to be monitored by the UE may include a DL bandwidth part indication field (DL BIF) for downlink bandwidth part switching.

Whether to include the DL BIF can be determined by the DL allocation DCI format. That is, the DL BIF can be included only for the DCI format 1_0 and the DCI format 1_1 of the DCI format 1_1, which are DCI formats that the UE should monitor to receive the PDSCH scheduling control information for the UE having one or more bandwidth parts. Referring to FIG. 9, it is shown that the DCI format 1_1 includes scheduling information for DL BIF and PDSCH.

Alternatively, uplink bandwidth part switching may be indicated through an uplink grant (DC grant) including resource allocation information for the PUSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include an UL bandwidth part indication field (UL BIF) for uplink bandwidth part switching.

The inclusion of the UL BIF may be determined by the UL grant DCI format. That is, for DCI format 0_0 and DCI format 0_1, which is a DCI format that a corresponding terminal should monitor to receive uplink data channel (PUSCH) scheduling control information for a terminal having one or more bandwidth parts, only UL BIF May be included. Referring to FIG. 10, the UL BIF and the scheduling information for the uplink data channel are included in the DCI format 0_1.

In FIGS. 9 and 10, scheduling information is included in the downlink control information DCI, but the present invention is not limited thereto. According to one example, DL BWP switching over the DCI that does not include scheduling information for the PDSCH may be supported. For example, when the DL assignment DCI format is used only for DL BWP switching without PDSCH scheduling, all or some of the information areas excluding the DL BIF among the information areas constituting the DL assignment DCI format (for example, MCS field and / or PRB allocation field, etc.) may be set to a specific value (e.g., '0'). Likewise, when UL grant DCI format is used only for UL BWP switching without PUSCH scheduling, all or some of the information areas excluding the UL BIF among the information areas constituting the UL grant DCI format (for example, MCS field and / or PRB allocation field, etc.) can be set to a specific value (e.g., '0').

According to one example, the bandwidth part indication field (BIF) may be determined according to an N value, which is the number of bandwidth parts included in the bandwidth part set configured for the terminal in the serving cell, The BIF can indicate the index (index, 00, 01, 10, 11) of the BWP that is composed of log ₂ (N) bits and is activated. Or BIF is configured with log ₂ (N + 1) bits to indicate the BWP index to be newly activated at the time of BWP switching, as well as to indicate the current active BWP to be maintained ) (E.g., all of the log ₂ (N + 1) bits are '0').

Alternatively, if the number of bandwidth parts configured for the terminal is less than or equal to 3 (N = <3), the BIF is configured with log ₂ (N + 1) bits, , And BIF may be composed of log ₂ (N) bits. That is, it can be composed of 1 bit when N is 1, 2 bits when N is 2, 2 bits when N is 3, and 2 bits when N is 4.

According to an exemplary embodiment, the bandwidth part indicated by the value of the BIF may be determined by reflecting the traffic load of the uplink and the downlink to the terminal at the time of data channel transmission / reception. If there is less power consumption when using another bandwidth part that is inactive than power consumption due to the active bandwidth part between the terminal and the base station, the terminal may receive a DCI from the base station indicating bandwidth part switching to another bandwidth part .

According to an example, the load at the time of data channel transmission / reception can be determined based on the state of the UE or the state of the DL data channel and the UL data channel. As shown in FIG. 4, when N bandwidth parts having various bandwidths are configured for a terminal, the terminal or the base station can switch to an appropriate bandwidth part according to the traffic load of the terminal at any time. A bandwidth part having the lowest power consumption at that point in time can be selectively used, thereby reducing power consumption due to maintaining unnecessary bandwidth based on bandwidth.

For example, if the power consumption of the terminal or the base station is greater than the predetermined reference value, the power consumption of the terminal or the base station can be checked according to the other bandwidth part. If it is determined that the power consumption according to another bandwidth part is smaller, information indicating the bandwidth part may be included in the DCI. However, this is not limited to a specific method as long as it can determine the power consumption per bandwidth part as an example.

In the above description, the terminal receives the BIF indicating the bandwidth part to be newly activated from the base station for switching the bandwidth part, but the present invention is not limited to this. According to an example, a terminal may receive a BIF indicating a bandwidth part to be newly activated from another terminal that has transmitted a capability value of the terminal.

5, the terminal activates a bandwidth part indicated by the value of the BIF in consideration of the transition time determined according to the bandwidth part switching delay type information (step S520) And the channel can be transmitted / received (S530).

When the DL bandwidth part switching is instructed to the UE through the DCI, the UE can derive the DL BWP switching time of the UE based on the slot on which the PDCCH including the DCI is received. Referring to FIG. 11, a UE deactivates an existing DL BWP from a slot in which a PDCCH is received, and activates a new DL BWP indicated by a bandwidth part indication field included in the DL assignment DCI. can do. The BWP switching time, i.e. the BWP transition time k, may be determined by the capabilities of the terminal.

Also, the UE can be configured not to receive the PDCCH or PDSCH through the existing DL BWP during the DCI reception time including the BWP switching indication information and the corresponding BWP switching time. Alternatively, whether the PDCCH or PDSCH can be received through the existing BWP during the BWP switching time can be determined by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or by terminal capability.

In addition, when the BWP switching time is determined by the terminal capability, the timing gap between the DCI reception timing point indicated by the time domain resource assignment information, which is the scheduling information included in the DCI, If the gap (e.g., k0 value) does not guarantee the BWP switching time related capability indicated by the UE, the UE may not perform BWP switching according to the DCI indication. In this case, according to an example, as shown in FIG. 12, the UE can transmit and receive a data channel from a point in time when a k0 slot defined by the scheduling information has elapsed, while maintaining the previous bandwidth part.

According to another example, time domain PDSCH resource allocation information transmitted through a DL assignment DCI (for example, a timing gap between a DL assignment DCI and a PDSCH transmission / reception timing gap setting information) or PDSCH transmission slot according to timing relationship setting information between the DL assignment set by the RRC signaling and the PDSCH transmission according to the RRC signaling is n + k1 slots, an arbitrary k2 DL BWP switching can be performed in an n + k1-k2 slot before the slot. For example, if k2 = 0, the existing DL BWP can be deactivated from the PDSCH transmission slot and the new DL BWP indicated by the DL assignment DCI can be activated.

In this case, the value of k2 may be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the terminal can transmit a capability value for setting the BWP switching time to the base station.

Likewise, when UL BWP switching is instructed to the UE through the UL grant DCI including resource allocation information for the PUSCH, the UE determines, based on the slot on which the PDCCH including the DCI is received, The UL BWP switching time can be derived. From the slot in which the PDCCH is received, the existing UL BWP can be deactivated after j slots and the new UL BWP indicated by the BIF included in the UL grant DCI can be activated. Here, the UL BWP switching time j value may be determined by the capacity of the UE.

Also, the UE may be configured not to transmit the PUCCH or PUSCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the BWP switching time according to the BWP switching time. Or whether the PUCCH or PUSCH can be transmitted through the existing BWP during the BWP switching time is set by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or may be determined by the terminal capability.

In addition, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PUSCH transmission time point If the gap (e.g., k2 value) does not guarantee the BWP switching time related capability indicated by the UE, the UE may not perform BWP switching according to the DCI indication.

According to another example, time domain PDSCH resource allocation information transmitted through the UL grant DCI (for example, timing gap between the UL grant DCI and the PUSCH transmission / reception timing gap setting information) or a PUSCH transmission slot according to the timing relationship setting information between the UL grant set by the RRC signaling and the corresponding PUSCH transmission is n + j1 slots, an arbitrary j2 DL BWP switching can be performed in the n + k1-j2 slot before the slot. For example, if j2 = 0, the existing UL BWP may be deactivated from the PUSCH transmission slot and the new UL BWP indicated by the UL grant DCI may be activated.

In this case, the j2 value can be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the terminal can transmit a capability value for setting the BWP switching time to the base station.

The UE can transmit / receive the data channel through the active bandwidth part in accordance with the scheduling information included in the DCI. In FIG. 11, it is shown that the bandwidth part is switched immediately after the lapse of the k-th slot, which is the BWP switching time. However, this is not limitative. According to another example, the switching of the bandwidth part may be performed upon transmission and reception of the data channel after the lapse of k0 slots according to the scheduling information.

The terminal can activate a new bandwidth part indicated by the value of the bandwidth part indication field at the switching time described above and transmit and receive data channels to and from the base station. According to this, switching to a bandwidth part having low power consumption can be performed efficiently according to the capacity of the terminal.

In the above description, the data channel is transmitted / received through the newly activated bandwidth part between the terminal and the base station, but the present invention is not limited thereto. According to an example, a terminal may transmit and receive a data channel to another terminal through a newly activated bandwidth part.

6 is a diagram illustrating a procedure for the base station to switch bandwidth parts in the present embodiment.

Referring to FIG. 6, a base station can receive physical layer capability information including bandwidth delay (BWP) switching delay type information from a mobile station (S600).

The base station may transmit bandwidth part configuration information to the terminal. The base station may transmit bandwidth part configuration information to the terminal via higher layer signaling (e.g., RRC signaling). The bandwidth part configuration information is information on a bandwidth part set that includes one or more bandwidth parts configured for the terminal. According to one example, the bandwidth part configuration information may include index information indicating each bandwidth part of the bandwidth part set. The bandwidth part setting information for configuring the bandwidth part set has been described in step S500 of FIG. 5, and redundant description will be omitted.

According to one example, the bandwidth part switching delay (BWP switching delay), which is the time taken to convert a bandwidth part used for transmitting and receiving a data channel to another bandwidth part, can be determined by the capability of the terminal. Depending on the capacity of the terminal, the terminal may be classified into any one of a predetermined bandwidth part switching delay type divided into at least two types. For effective switching of the bandwidth part, the BS may receive physical layer capability information including switching delay type information determined by the capability of the UE from the UE.

That is, when downlink bandwidth part switching (DL BWP switching) is instructed to the UE through the DCI, the UE calculates a downlink BWP switching time (DL BWP switching) of the UE based on the slot on which the PDCCH including the DCI is received time can be derived. According to one example, the switching delay type of the terminal can be determined according to the derived BWP switching time.

For example, in a (n + k) th slot where k slots have elapsed, the PDCCH including the DCI is received at an arbitrary nth slot, the existing active DL BWP is deactivated and the DL assignment DCI Lt; RTI ID = 0.0 &gt; BWP &lt; / RTI &gt; In this case, according to an example, k, which is the time taken to switch the DL BWP, can be determined by the capability of the terminal.

When the BWP switching time is determined by the capability of the terminal, the base station can receive the capability value of the terminal for setting the BWP switching time from the terminal. When a BS wants to switch a bandwidth part used for transmission / reception of a data channel with a UE, the BS may adjust the scheduling of the data channel by reflecting the capability value of the UE.

Referring to FIG. 6 again, the BS reflects the traffic load of the UE and transmits a bandwidth part indication indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth parts set Field (S610).

According to one example, the bandwidth part indication field (BIF) may be determined according to an N value, which is the number of bandwidth parts included in the bandwidth part set configured for the terminal in the serving cell, The BIF can indicate the index (index, 00, 01, 10, 11) of the BWP that is composed of log ₂ (N) bits and is activated. Or BIF is configured with log ₂ (N + 1) bits to indicate the BWP index to be newly activated at the time of BWP switching, as well as to indicate the current active BWP to be maintained ) (E.g., all of the log ₂ (N + 1) bits are '0').

Alternatively, if the number of bandwidth parts configured for the terminal is less than or equal to 3 (N = <3), the BIF is configured with log ₂ (N + 1) bits, , And BIF may be composed of log ₂ (N) bits. That is, it can be composed of 1 bit when N is 1, 2 bits when N is 2, 2 bits when N is 3, and 2 bits when N is 4.

The base station may transmit the downlink data channel to the terminal or receive the uplink data channel from the terminal through one bandwidth part indicated by the downlink control information (DCI). According to one example, the bandwidth part indicated by the bandwidth part indicator field (BIF) may be set to one at a specific time step. According to an example, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the UE can be set up to N (N is a natural number equal to or greater than 1), respectively.

According to an exemplary embodiment, the bandwidth part indicated by the value of the BIF may be determined by reflecting the traffic load of the uplink and the downlink to the terminal at the time of data channel transmission / reception. If the power consumption of a bandwidth part other than the power consumed by the bandwidth part used for transmitting and receiving the data channel between the terminal and the base station is smaller, the base station transmits the DCI instructing BWP switching to another bandwidth part to the terminal .

According to an example, the load at the time of data channel transmission / reception can be determined based on the state of the UE or the state of the DL data channel and the UL data channel. As shown in FIG. 4, when N bandwidth parts having various bandwidths are configured for a terminal, the terminal or the base station can switch to an appropriate bandwidth part according to the traffic load of the terminal at any time. A bandwidth part having the lowest power consumption at that point in time can be selectively used, thereby reducing power consumption due to maintaining unnecessary bandwidth based on bandwidth.

For example, if the power consumption of the terminal or the base station is greater than the predetermined reference value, the power consumption of the terminal or the base station can be checked according to the other bandwidth part. If it is determined that the power consumption according to another bandwidth part is smaller, information indicating the bandwidth part may be included in the DCI. However, this is not limited to a specific method as long as it can determine the power consumption per bandwidth part as an example.

Referring to FIG. 6, the base station may transmit downlink control information including scheduling information for a bandwidth part indication field and a data channel to the mobile station in operation S620.

Among the bandwidth parts included in the bandwidth part set configured in the UE, a bandwidth part indication field indicating the bandwidth part to be used for transmission / reception of the data channel can be transmitted through the scheduling DCI.

According to an example, downlink bandwidth part switching may be indicated via a DL assignment DCI including resource allocation information for the PDSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include a DL bandwidth part indication field (DL BIF) for downlink bandwidth part switching.

Whether to include the DL BIF can be determined by the DL assignment DCI format. That is, the DL BIF can be included only for the DCI format 1_0 and the DCI format 1_1 of the DCI format 1_1, which are DCI formats that the UE should monitor to receive the PDSCH scheduling control information for the UE having one or more bandwidth parts. Referring to FIG. 9, the BS may transmit scheduling information for the DL BIF and the PDSCH to the UE in the DCI format 1_1.

Alternatively, uplink bandwidth part switching may be indicated through an uplink grant (DC grant) including resource allocation information for the PUSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include an UL bandwidth part indication field (UL BIF) for uplink bandwidth part switching.

The inclusion of the UL BIF may be determined by the UL grant DCI format. That is, the UL BIF can be included only for the DCI format 0_0 and the DCI format 0_1 among the DCI format 0_1, which is a DCI format to be monitored by the terminal for receiving the PUSCH scheduling control information for a terminal having one or more bandwidth parts. Referring to FIG. 10, the base station may transmit scheduling information on the UL BIF and the PUSCH to the UE in the DCI format 0_1.

In FIGS. 9 and 10, scheduling information is included in the downlink control information DCI, but the present invention is not limited thereto. According to one example, DL BWP switching over the DCI that does not include scheduling information for the PDSCH may be supported. For example, when the DL assignment DCI format is used only for DL BWP switching without PDSCH scheduling, all or some of the information areas excluding the DL BIF among the information areas constituting the DL assignment DCI format (for example, MCS field and / or PRB allocation field, etc.) may be set to a specific value (e.g., '0'). Likewise, when UL grant DCI format is used only for UL BWP switching without PUSCH scheduling, all or some of the information areas excluding the UL BIF among the information areas constituting the UL grant DCI format (for example, MCS field and / or PRB allocation field, etc.) can be set to a specific value (e.g., '0').

6, when the bandwidth part indicated by the value of the bandwidth part indication field is activated in consideration of the switching time determined according to the bandwidth part switching delay type information, the base station transmits and receives the data channel according to the scheduling information (S630).

If DL bandwidth part switching is instructed for the UE through the DCI, the UE can derive the downlink bandwidth part switching time of the UE based on the slot on which the PDCCH including the DCI is received. Referring to FIG. 9, after a k slot from a slot in which a PDCCH is received, an existing DL BWP may be deactivated and a new DL BWP indicated by a DL assignment DCI may be activated. In FIG. 9, N is the decoding time of the PDCCH, and the bandwidth part switching time k including this is determined by the capacity of the UE.

According to another example, time domain PDSCH resource allocation information transmitted through a DL assignment DCI (for example, a timing gap between a DL assignment DCI and a PDSCH transmission / reception timing gap setting information) or PDSCH transmission slot according to timing relationship setting information between the DL assignment set by the RRC signaling and the PDSCH transmission according to the RRC signaling is n + k1 slots, an arbitrary k2 DL BWP switching can be performed in an n + k1-k2 slot before the slot. For example, if k2 = 0, the existing DL BWP can be deactivated from the PDSCH transmission slot and the new DL BWP indicated by the DL assignment DCI can be activated.

In this case, the value of k2 may be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the base station can receive a capability value for setting the BWP transition time from the terminal.

Similarly, when the base station instructs the UL bandwidth part switching for the UE through the UL grant DCI including the resource allocation information for the PUSCH, the UE transmits a slot to which the PDCCH including the DCI is received It is possible to derive the uplink bandwidth part switching time of the UE. The existing UL BWP may deactivate and activate the new UL BWP indicated by the UL grant DCI from the j slot after the PDCCH is received. Here, the bandwidth part switching time j value may be determined by the capacity of the UE.

According to another example, time domain PDSCH resource allocation information transmitted through the UL grant DCI (for example, timing gap between the UL grant DCI and the PUSCH transmission / reception timing gap setting information) or a PUSCH transmission slot according to the timing relationship setting information between the UL grant set by the RRC signaling and the corresponding PUSCH transmission is n + j1 slots, an arbitrary j2 DL BWP switching can be performed in the n + k1-j2 slot before the slot. For example, if j2 = 0, the existing UL BWP may be deactivated from the PUSCH transmission slot and the new UL BWP indicated by the UL grant DCI may be activated.

In this case, the j2 value can be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the base station can receive a capability value for setting the BWP transition time from the terminal.

The base station can transmit and receive a data channel with the terminal when a new bandwidth part indicated by the value of the bandwidth part indication field according to the switching time is activated. According to this, it is possible to switch the bandwidth part efficiently according to the capacity of the terminal.

As described above, according to the present specification, each operation by the base station can be performed also at a specific other terminal. In this case, according to one embodiment, the contents described with reference to FIG. 6 can be applied substantially equally between a terminal and another terminal.

7 is a diagram illustrating a procedure in which a terminal switches bandwidth parts in the present embodiment.

Referring to FIG. 7, a mobile station can transmit physical layer capability information including a BWP (bandwidth part) switching delay type information (S700).

Since step S700 is substantially the same as step S500 of FIG. 5, detailed description will be omitted in order to avoid redundant description. Hereinafter, in the case of the embodiment of FIG. 7, the contents described in FIG. 5 can be practically applied equally, so that description of the contents overlapping with those described in FIG. 5 will be omitted as appropriate.

As described above with reference to FIG. 5, according to an example, a terminal may transmit a capability value of a terminal to a base station in order to switch a bandwidth part used for communication with the base station. Also, according to another example, The capability value of the terminal can be transferred to another terminal in order to switch the bandwidth part used for communication with another terminal.

Referring again to FIG. 7, a terminal may transmit a bandwidth part indication field indicating a bandwidth part different from an active bandwidth part of one or more bandwidth parts included in a bandwidth part set configured in the terminal, and scheduling information (S710). &Lt; / RTI &gt;

The UE can receive the downlink data channel from the base station or transmit the uplink data channel to the base station through one bandwidth part indicated by the downlink control information (DCI) received from the base station. According to an example, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the UE can be set up to N (N is a natural number equal to or greater than 1), respectively. However, as an example, the number of DL bandwidth parts and the number of UL bandwidth parts may be set differently.

Among the bandwidth parts included in the bandwidth part set configured in the UE, the BIF indicating the bandwidth part to be used for transmission / reception of the data channel can be transmitted through the scheduling DCI. The DL assignment DCI format configured for monitoring at the UE may include a DL bandwidth part indication field (DL BIF) for downlink bandwidth part switching.

Whether to include the DL BIF can be determined by the DL allocation DCI format. That is, the DL BIF can be included only for the DCI format 1_0 and the DCI format 1_1 of the DCI format 1_1, which are DCI formats that the UE should monitor to receive the PDSCH scheduling control information for the UE having one or more bandwidth parts. Referring to FIG. 9, it is shown that the DCI format 1_1 includes scheduling information for DL BIF and PDSCH.

Alternatively, uplink bandwidth part switching may be indicated through an uplink grant (DC grant) including resource allocation information for the PUSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include an UL bandwidth part indication field (UL BIF) for uplink bandwidth part switching.

The inclusion of the UL BIF may be determined by the UL grant DCI format. That is, for DCI format 0_0 and DCI format 0_1, which is a DCI format that a corresponding terminal should monitor to receive uplink data channel (PUSCH) scheduling control information for a terminal having one or more bandwidth parts, only UL BIF May be included. Referring to FIG. 10, the UL BIF and the scheduling information for the uplink data channel are included in the DCI format 0_1.

According to one example, the bandwidth part indication field (BIF) may be determined according to an N value, which is the number of bandwidth parts included in the bandwidth part set configured for the terminal in the serving cell, The BIF can indicate the index (index, 00, 01, 10, 11) of the BWP that is composed of log ₂ (N) bits and is activated. Or BIF is configured with log ₂ (N + 1) bits to indicate the BWP index to be newly activated at the time of BWP switching, as well as to indicate the current active BWP to be maintained ) (E.g., all of the log ₂ (N + 1) bits are '0').

Alternatively, if the number of bandwidth parts configured for the terminal is less than or equal to 3 (N = <3), the BIF is configured with log ₂ (N + 1) bits, , And BIF may be composed of log ₂ (N) bits. That is, it can be composed of 1 bit when N is 1, 2 bits when N is 2, 2 bits when N is 3, and 2 bits when N is 4.

In the above description, the terminal receives the BIF indicating the bandwidth part to be newly activated from the base station for switching the bandwidth part, but the present invention is not limited to this. According to an example, a terminal may receive a BIF indicating a bandwidth part to be newly activated from another terminal that has transmitted a capability value of the terminal.

7, the terminal activates a bandwidth part indicated by the value of the BIF in consideration of the transition time determined according to the bandwidth part switching delay type information (S720) And transmits and receives the channel (S730).

When the DL bandwidth part switching is instructed to the UE through the DCI, the UE can derive the DL BWP switching time of the UE based on the slot on which the PDCCH including the DCI is received. Referring to FIG. 11, a UE deactivates an existing DL BWP from a slot in which a PDCCH is received, and activates a new DL BWP indicated by a bandwidth part indication field included in the DL assignment DCI. can do. The BWP switching time, i.e. the BWP transition time k, may be determined by the capabilities of the terminal.

Also, the UE can be configured not to receive the PDCCH or PDSCH through the existing DL BWP during the DCI reception time including the BWP switching indication information and the corresponding BWP switching time. Alternatively, whether the PDCCH or PDSCH can be received through the existing BWP during the BWP switching time can be determined by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or by terminal capability.

The UE can transmit / receive the data channel through the active bandwidth part in accordance with the scheduling information included in the DCI. In FIG. 11, it is shown that the bandwidth part is switched immediately after the lapse of the k-th slot, which is the BWP switching time. However, this is not limitative. According to another example, the switching of the bandwidth part may be performed upon transmission and reception of the data channel after the lapse of k0 slots according to the scheduling information.

According to an embodiment, if the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the terminal can maintain the activation of the currently active bandwidth part.

That is, as shown in FIG. 12, a timing gap (for example, k0 value) between the DCI reception time point indicated by the scheduling information included in the DCI and the reception time point of the data channel is indicated by the terminal If the BWP switching time (k) related capability can not be guaranteed, the terminal may not perform BWP switching according to the DCI instruction. In this case, according to an example, the UE can transmit and receive a data channel from a point in time when a k0 slot determined by the scheduling information has elapsed, while maintaining the previous bandwidth part.

In addition, according to an exemplary embodiment, if the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the terminal activates a predetermined default bandwidth part (default BWP) can do. 13, when the k0 value, which is the timing gap between the DCI reception timing point indicated by the scheduling information included in the DCI and the reception timing point of the data channel, is ahead of the BWP switching time point k indicated by the terminal, May not perform BWP switching according to the instructions of the DCI.

In this case, the terminal can activate a predetermined default bandwidth part and transmit / receive the data channel. The default bandwidth part shown in Fig. 13 is an example, and is not limited to the configuration shown in Fig. According to an example, if the default bandwidth part is switched at the lapse of k slots, the terminal may send information to the base station indicating that the data channel is receivable, or may request a DCI including new scheduling information for the data channel.

Alternatively, according to another example, the switching time kd to the default bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if kd is faster than k0, the UE may switch to the default bandwidth part at a time point kd elapses after PDCCH reception, unlike that shown in Fig.

In addition, according to an exemplary embodiment, if the transmission time of the data channel according to the scheduling information is before the switching time based on the reception time of the downlink control information, the terminal transmits an initial BWP, Can be activated. 14, when the k0 value, which is the timing gap between the DCI reception time point and the data channel reception time point, indicated by the scheduling information included in the DCI, is ahead of the BWP switching time k indicated by the terminal, May not perform BWP switching according to the instructions of the DCI.

In this case, the terminal can activate the initial bandwidth part and transmit / receive the data channel. The initial bandwidth part shown in Fig. 14 is, by way of example, not limited to the form shown in Fig. According to an example, if the initial bandwidth part is switched at the lapse of k slots, the terminal may transmit information indicating that the data channel is available to the base station, or may request a DCI including new scheduling information for the data channel.

Alternatively, according to another example, the switching time ki to the initial bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if ki is faster than k0, the UE can switch to the initial bandwidth part at the point of time after Ki since PDCCH reception, unlike that shown in Fig.

In FIGS. 11 to 14, the transmission of the downlink data channel is shown, but the same can be applied to the uplink data channel transmission. That is, when the UL BWP switching for the UE is indicated through the UL grant DCI including the resource allocation information for the PUSCH, the UE transmits the UL BWP to the UE 100 based on the slot on which the PDCCH including the DCI is received. The UL BWP switching time can be derived. From the slot in which the PDCCH is received, the existing UL BWP can be deactivated after j slots and the new UL BWP indicated by the BIF included in the UL grant DCI can be activated. Here, the UL BWP switching time j value may be determined by the capacity of the UE.

Also, the UE may be configured not to transmit the PUCCH or PUSCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the BWP switching time according to the BWP switching time. Or whether the PUCCH or PUSCH can be transmitted through the existing BWP during the BWP switching time is set by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or may be determined by the terminal capability.

In addition, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PUSCH transmission time point If the gap (e.g., k2 value) does not guarantee the BWP switching time related capability indicated by the UE, the UE may not perform BWP switching according to the DCI indication.

In this case, as described in FIGS. 12 to 14, it is possible to maintain the existing active bandwidth part, convert to a predetermined default bandwidth part, or switch to the initial bandwidth part to transmit the data channel for the uplink.

The terminal can activate a new bandwidth part and transmit and receive data channels with the base station, as described above. According to this, switching to a new bandwidth part can be performed efficiently according to the capacity of the terminal.

In the above description, the data channel is transmitted / received through the newly activated bandwidth part between the terminal and the base station, but the present invention is not limited thereto. According to an example, a terminal may transmit and receive a data channel to another terminal through a newly activated bandwidth part.

8 is a diagram illustrating a procedure for the base station to switch bandwidth parts in the present embodiment.

Referring to FIG. 8, a base station can receive physical layer capability information including a bandwidth part (BWP) switching delay type information from a mobile station (S800).

Since step S800 is substantially the same as step S600 of FIG. 6, detailed description will be omitted in order to avoid redundant description. In the case of the embodiment of FIG. 8 as well, the contents described in FIG. 6 can be practically applied in the same manner, so that description of the contents overlapping with those described in FIG. 6 will be omitted.

8, the BS may determine a bandwidth part indication field indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth parts set in the terminal (S810) .

According to one example, the bandwidth part indication field (BIF) may be determined according to an N value, which is the number of bandwidth parts included in the bandwidth part set configured for the terminal in the serving cell, The BIF can indicate the index (index, 00, 01, 10, 11) of the BWP that is composed of log ₂ (N) bits and is activated. Or BIF is configured with log ₂ (N + 1) bits to indicate the BWP index to be newly activated at the time of BWP switching, as well as to indicate the current active BWP to be maintained ) (E.g., all of the log ₂ (N + 1) bits are '0').

Alternatively, if the number of bandwidth parts configured for the terminal is less than or equal to 3 (N = <3), the BIF is configured with log ₂ (N + 1) bits, , And BIF may be composed of log ₂ (N) bits. That is, it can be composed of 1 bit when N is 1, 2 bits when N is 2, 2 bits when N is 3, and 2 bits when N is 4.

The base station may transmit the downlink data channel to the terminal or receive the uplink data channel from the terminal through one bandwidth part indicated by the downlink control information (DCI). According to one example, the bandwidth part indicated by the bandwidth part indicator field (BIF) may be set to one at a specific time step. According to an example, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the UE can be set up to N (N is a natural number equal to or greater than 1), respectively.

Referring back to FIG. 8, the base station may transmit downlink control information including scheduling information for a bandwidth part indication field and a data channel to the mobile station (S820).

Among the bandwidth parts included in the bandwidth part set configured in the UE, a bandwidth part indication field indicating the bandwidth part to be used for transmission / reception of the data channel can be transmitted through the scheduling DCI.

According to an example, downlink bandwidth part switching may be indicated via a DL assignment DCI including resource allocation information for the PDSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include a DL bandwidth part indication field (DL BIF) for downlink bandwidth part switching.

Whether to include the DL BIF can be determined by the DL assignment DCI format. That is, the DL BIF can be included only for the DCI format 1_0 and the DCI format 1_1 of the DCI format 1_1, which are DCI formats that the UE should monitor to receive the PDSCH scheduling control information for the UE having one or more bandwidth parts. Referring to FIG. 9, the BS may transmit scheduling information for the DL BIF and the PDSCH to the UE in the DCI format 1_1.

Alternatively, uplink bandwidth part switching may be indicated through an uplink grant (DC grant) including resource allocation information for the PUSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include an UL bandwidth part indication field (UL BIF) for uplink bandwidth part switching.

The inclusion of the UL BIF may be determined by the UL grant DCI format. That is, the UL BIF can be included only for the DCI format 0_0 and the DCI format 0_1 among the DCI format 0_1, which is a DCI format to be monitored by the terminal for receiving the PUSCH scheduling control information for a terminal having one or more bandwidth parts. Referring to FIG. 10, the base station may transmit scheduling information on the UL BIF and the PUSCH to the UE in the DCI format 0_1.

Referring to FIG. 8 again, if the bandwidth part indicated by the value of the bandwidth part indication field is activated considering the switching time determined according to the bandwidth part switching delay type information, the base station transmits and receives the data channel according to the scheduling information (S830).

If DL bandwidth part switching is instructed for the UE through the DCI, the UE can derive the downlink bandwidth part switching time of the UE based on the slot on which the PDCCH including the DCI is received. Referring to FIG. 11, after the k slot from the slot in which the PDCCH is received, the existing DL BWP may be deactivated and the new DL BWP indicated by the DL assignment DCI may be activated. In FIG. 9, N is the decoding time of the PDCCH, and the bandwidth part switching time k including this is determined by the capacity of the UE.

Similarly, when the base station instructs the UL bandwidth part switching for the UE through the UL grant DCI including the resource allocation information for the PUSCH, the UE transmits a slot to which the PDCCH including the DCI is received It is possible to derive the uplink bandwidth part switching time of the UE. The existing UL BWP may deactivate and activate the new UL BWP indicated by the UL grant DCI from the j slot after the PDCCH is received. Here, the bandwidth part switching time j value may be determined by the capacity of the UE.

The base station can transmit and receive the data channel through the active bandwidth part in accordance with the scheduling information included in the DCI. In FIG. 11, it is shown that the bandwidth part is switched immediately after the lapse of the k-th slot, which is the BWP switching time. However, this is not limitative. According to another example, the switching of the bandwidth part may be performed upon transmission and reception of the data channel after the lapse of k0 slots according to the scheduling information.

According to an embodiment, when the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the base station can maintain the activation of the currently active bandwidth part.

That is, as shown in FIG. 12, a timing gap (for example, k0 value) between the DCI reception time point indicated by the scheduling information included in the DCI and the reception time point of the data channel is indicated by the terminal If the BWP switching time (k) related capability can not be guaranteed, the terminal may not perform BWP switching according to the DCI instruction. In this case, according to an example, the base station can transmit and receive the data channel from the point of time when the k0 slot defined by the scheduling information has elapsed, while maintaining the previous bandwidth part.

In addition, according to one embodiment, when the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the base station sets a predetermined default bandwidth part (default BWP) Lt; RTI ID = 0.0 &gt; and / or &lt; / RTI &gt; 13, when the k0 value, which is the timing gap between the DCI reception timing point indicated by the scheduling information included in the DCI and the reception timing point of the data channel, is ahead of the BWP switching time point k indicated by the terminal, May not perform BWP switching according to the instructions of the DCI.

In this case, the base station can transmit the data channel through the default bandwidth part activated by the terminal. According to one example, when switched over with a default bandwidth part k slots, the base station receives from the terminal information indicating that the data channel is available to the base station, or receives a DCI request containing new scheduling information for the data channel .

Alternatively, according to another example, the switching time kd to the default bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if kd is faster than k0, the UE may switch to the default bandwidth part at a time point kd elapses after PDCCH reception, unlike that shown in Fig. In this case, the base station can transmit the data channel with the default bandwidth part when k0 elapses.

In addition, according to an embodiment, when the transmission time of the data channel according to the scheduling information is before the switching time based on the reception time of the downlink control information, the base station transmits the data through the initial BWP Channel can be transmitted. 14, when the k0 value, which is the timing gap between the DCI reception time point and the data channel reception time point, indicated by the scheduling information included in the DCI, is ahead of the BWP switching time k indicated by the terminal, May not perform BWP switching according to the instructions of the DCI.

In this case, the base station can transmit the data channel through the initial bandwidth part activated by the terminal. According to one example, if the initial bandwidth part is switched over with k slots elapsed, the base station may receive information indicating that the data channel is receivable from the terminal or may receive a DCI request including new scheduling information for the data channel .

Alternatively, according to another example, the switching time ki to the initial bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if ki is faster than k0, the UE can switch to the initial bandwidth part at the point of time after Ki since PDCCH reception, unlike that shown in Fig. In this case, the base station can transmit the data channel as an initial bandwidth part when k0 elapses.

In FIGS. 11 to 14, the transmission of the downlink data channel is shown, but the same can be applied to the uplink data channel transmission. That is, when the UL BWP switching for the UE is indicated through the UL grant DCI including the resource allocation information for the PUSCH, the UE transmits the UL BWP to the UE 100 based on the slot on which the PDCCH including the DCI is received. The UL BWP switching time can be derived. From the slot in which the PDCCH is received, the existing UL BWP can be deactivated after j slots and the new UL BWP indicated by the BIF included in the UL grant DCI can be activated. Here, the UL BWP switching time j value may be determined by the capacity of the UE.

Also, the UE may be configured not to transmit the PUCCH or PUSCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the BWP switching time according to the BWP switching time. Or whether the PUCCH or PUSCH can be transmitted through the existing BWP during the BWP switching time is set by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or may be determined by the terminal capability.

In addition, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PUSCH transmission time point If the gap (e.g., k2 value) does not guarantee the BWP switching time related capability indicated by the UE, the UE may not perform BWP switching according to the DCI indication.

In this case, as described in FIG. 12 to FIG. 14, the terminal can maintain an existing active bandwidth part, convert to a predetermined default bandwidth part, or switch to an initial bandwidth part, The data channel for the uplink can be received.

The base station can transmit and receive a data channel with the terminal when a new bandwidth part indicated by the value of the bandwidth part indication field according to the switching time is activated. According to this, it is possible to switch the bandwidth part efficiently according to the capacity of the terminal.

As described above, according to the present specification, each operation by the base station can be performed also at a specific other terminal. In this case, according to one embodiment, the contents described with reference to FIG. 6 can be applied substantially equally between a terminal and another terminal.

15 is a diagram illustrating a configuration of a base station according to the present embodiments.

Referring to FIG. 15, a base station 1500 includes a controller 1510, a transmitter 1520, and a receiver 1530.

The transmitting unit 1520 and the receiving unit 1530 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the terminal.

Receiving unit 1530 may receive physical layer capability information including bandwidth part switching delay type information from the mobile station. According to one example, the bandwidth part switching delay (BWP switching delay), which is the time taken to convert a bandwidth part used for transmitting and receiving a data channel to another bandwidth part, can be determined by the capability of the terminal. Depending on the capacity of the terminal, the terminal may be classified into any one of a predetermined bandwidth part switching delay type divided into at least two types.

That is, when downlink bandwidth part switching (DL BWP switching) is instructed to the UE through the DCI, the UE calculates the downlink bandwidth part switching time DL BWP of the UE based on the slot on which the PDCCH including the DCI is received switching time can be derived. According to one example, depending on the derived bandwidth part switching time, the switching delay type of the terminal may be determined.

For example, in a (n + k) th slot where k slots have elapsed, the PDCCH including the DCI is received at an arbitrary nth slot, the existing active DL BWP is deactivated and the DL assignment DCI Lt; RTI ID = 0.0 &gt; BWP &lt; / RTI &gt; In this case, according to one example, k, the time taken to switch the downlink bandwidth part, may be determined by the capability of the terminal.

In this manner, when the BWP switching time is determined by the capability of the terminal, the receiving unit 1530 can receive the capability value of the terminal for setting the bandwidth part switching time from the terminal. Hereinafter, when the controller 1510 wants to switch a bandwidth part used for transmission / reception of a data channel with a terminal, the controller 1510 may adjust the scheduling of the data channel by reflecting the capability value of the received terminal.

The controller 1510 may configure bandwidth part (BWP) setting information for a bandwidth part set composed of one or more bandwidth parts set for the terminal.

At this time, the above-described bandwidth part setting information may include index information indicating a bandwidth part of each of the bandwidth partsets, for a bandwidth part set composed of one or more bandwidth parts set for the terminal. The base station may transmit bandwidth part configuration information to the terminal via higher layer signaling (e.g., RRC signaling).

In addition, the controller 1510 may determine a bandwidth part indication field indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth part set configured in the terminal.

According to one example, the bandwidth part indicated by the bandwidth part indicator field (BIF) may be set to one at a specific time step. According to an example, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the UE can be set up to N (N is a natural number equal to or greater than 1), respectively.

According to one example, the bandwidth part indication field (BIF) may be determined according to an N value, which is the number of bandwidth parts included in the bandwidth part set configured for the terminal in the serving cell, The BIF can indicate the index (index, 00, 01, 10, 11) of the BWP that is composed of log ₂ (N) bits and is activated. Or BIF is configured with log ₂ (N + 1) bits to indicate the BWP index to be newly activated at the time of BWP switching, as well as to indicate the current active BWP to be maintained ) (E.g., all of the log ₂ (N + 1) bits are '0').

Alternatively, if the number of bandwidth parts configured for the terminal is less than or equal to 3 (N = <3), the BIF is configured with log ₂ (N + 1) bits, , And BIF may be composed of log ₂ (N) bits. That is, it can be composed of 1 bit when N is 1, 2 bits when N is 2, 2 bits when N is 3, and 2 bits when N is 4.

According to one embodiment, the bandwidth part indicated by the value of the bandwidth part indication field may be determined by reflecting the load at the time of data channel transmission / reception. If it is determined that power consumption is lower when using a bandwidth part that is different from the power consumption according to the bandwidth part used for transmitting and receiving the data channel between the terminal and the base station, the controller 1510 instructs the bandwidth part switching to another bandwidth part DCI &lt; / RTI &gt;

The transmitter 1520 may transmit downlink control information including scheduling information on a bandwidth part indication field and a data channel to the UE. In addition, the transmitter 1520 may transmit the data channel according to the scheduling information when the bandwidth part indicated by the value of the bandwidth part indication field is activated in consideration of the switching time determined according to the bandwidth part switching delay type information.

The transmitting unit 1520 may transmit a bandwidth part indication field indicating a part of a bandwidth to be used for transmission / reception of a data channel among the bandwidth parts included in the bandwidth part set configured in the UE through the scheduling DCI.

According to an example, downlink bandwidth part switching may be indicated via a DL assignment DCI including resource allocation information for the PDSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include a DL bandwidth part indication field (DL BIF) for downlink bandwidth part switching.

Whether to include the DL BIF can be determined by the DL assignment DCI format. That is, the DL BIF can be included only for the DCI format 1_0 and the DCI format 1_1 of the DCI format 1_1, which are DCI formats that the UE should monitor to receive the PDSCH scheduling control information for the UE having one or more bandwidth parts. Referring to FIG. 9, the transmitter 1520 may transmit scheduling information for the DL BIF and the PDSCH to the UE in the DCI format 1_1.

Alternatively, uplink bandwidth part switching may be indicated through an uplink grant (DC grant) including resource allocation information for the PUSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include an UL bandwidth part indication field (UL BIF) for uplink bandwidth part switching.

The inclusion of the UL BIF may be determined by the UL grant DCI format. That is, the UL BIF can be included only for the DCI format 0_0 and the DCI format 0_1 among the DCI format 0_1, which is a DCI format to be monitored by the terminal for receiving the PUSCH scheduling control information for a terminal having one or more bandwidth parts. Referring to FIG. 10, the transmitter 1520 may transmit scheduling information on the UL BIF and the PUSCH to the UE in the DCI format 0_1.

The control unit 1510 can control the transmitting unit 1520 and the receiving unit 1530 to transmit and receive the data channel when the bandwidth part instructed according to the value of the bandwidth part indication field is activated in the terminal.

If DL bandwidth part switching is instructed for the UE through the DCI, the UE can derive the downlink bandwidth part switching time of the UE based on the slot on which the PDCCH including the DCI is received. Referring to FIG. 9, after a k slot from a slot in which a PDCCH is received, an existing DL BWP may be deactivated and a new DL BWP indicated by a DL assignment DCI may be activated. Here, the bandwidth part switching time k value can be determined by the capacity of the terminal.

According to another example, time domain PDSCH resource allocation information transmitted through a DL assignment DCI (for example, a timing gap between a DL assignment DCI and a PDSCH transmission / reception timing gap setting information) or PDSCH transmission slot according to timing relationship setting information between the DL assignment set by the RRC signaling and the PDSCH transmission according to the RRC signaling is n + k1 slots, an arbitrary k2 DL BWP switching can be performed in an n + k1-k2 slot before the slot. For example, if k2 = 0, the existing DL BWP can be deactivated from the PDSCH transmission slot and the new DL BWP indicated by the DL assignment DCI can be activated.

In this case, the value of k2 may be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the receiving unit 1010 can receive a capability value for setting the BWP transition time from the terminal.

Similarly, when the base station instructs the UL bandwidth part switching for the UE through the UL grant DCI including the resource allocation information for the PUSCH, the UE transmits a slot to which the PDCCH including the DCI is received It is possible to derive the uplink bandwidth part switching time of the UE. The existing UL BWP may deactivate and activate the new UL BWP indicated by the UL grant DCI from the j slot after the PDCCH is received. Here, the bandwidth part switching time j value may be determined by the capacity of the UE.

According to another example, time domain PDSCH resource allocation information transmitted through the UL grant DCI (for example, timing gap between the UL grant DCI and the PUSCH transmission / reception timing gap setting information) or a PUSCH transmission slot according to the timing relationship setting information between the UL grant set by the RRC signaling and the corresponding PUSCH transmission is n + j1 slots, an arbitrary j2 DL BWP switching can be performed in the n + k1-j2 slot before the slot. For example, if j2 = 0, the existing UL BWP may be deactivated from the PUSCH transmission slot and the new UL BWP indicated by the UL grant DCI may be activated.

In this case, the j2 value can be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the receiving unit 1010 can receive a capability value for setting the BWP transition time from the terminal.

The transmitter 1520 can transmit the data channel through the active bandwidth part according to the scheduling information including the DCI. In FIG. 11, it is shown that the bandwidth part is switched immediately after the lapse of the k-th slot, which is the BWP switching time. However, this is not limitative. According to another example, the switching of the bandwidth part may be performed upon transmission of the data channel after the lapse of k0 slots according to the scheduling information.

According to one embodiment, when the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the transmitter 1520 can maintain the activation of the currently active bandwidth part have.

That is, as shown in FIG. 12, a timing gap (for example, k0 value) between the DCI reception time point indicated by the scheduling information included in the DCI and the reception time point of the data channel is indicated by the terminal If the BWP switching time (k) related capability can not be guaranteed, the terminal may not perform BWP switching according to the DCI instruction. In this case, according to an example, the transmitter 1520 can transmit the data channel from the point in time when the k0 slot defined by the scheduling information has elapsed, while maintaining the previous bandwidth part.

According to one embodiment, if the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the transmitter 1520 transmits the activated predetermined default bandwidth part default BWP). 13, when the k0 value, which is the timing gap between the DCI reception timing point indicated by the scheduling information included in the DCI and the reception timing point of the data channel, is ahead of the BWP switching time point k indicated by the terminal, May not perform BWP switching according to the instructions of the DCI.

In this case, the transmitter 1520 can transmit the data channel through the default bandwidth part activated by the terminal. According to one example, when the k-th slot is switched to the default bandwidth part, the receiving unit 1530 receives information indicating that the data channel can be received from the terminal or receives a DCI request including new scheduling information for the data channel Lt; / RTI &gt;

Alternatively, according to another example, the switching time kd to the default bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if kd is faster than k0, the UE may switch to the default bandwidth part at a time point kd elapses after PDCCH reception, unlike that shown in Fig. In this case, the transmitter 1520 can transmit the data channel with the default bandwidth part when k0 elapses.

In addition, according to one embodiment, when the transmission time of the data channel according to the scheduling information is before the switching time elapses based on the reception time of the downlink control information, the active initial bandwidth part (initial BWP) Lt; RTI ID = 0.0 &gt; a &lt; / RTI &gt; 14, when the k0 value, which is the timing gap between the DCI reception time point and the data channel reception time point, indicated by the scheduling information included in the DCI, is ahead of the BWP switching time k indicated by the terminal, May not perform BWP switching according to the instructions of the DCI.

In this case, the transmitter 1520 can transmit the data channel through the initial bandwidth part activated by the terminal. According to an example, when the k-th slot is switched to the initial bandwidth part, the receiving unit 1530 receives information indicating that the data channel can be received from the UE, or receives a DCI request including new scheduling information for the data channel can do.

Alternatively, according to another example, the switching time ki to the initial bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if ki is faster than k0, the UE can switch to the initial bandwidth part at the point of time after Ki since PDCCH reception, unlike that shown in Fig. In this case, the transmitter 1520 can transmit the data channel as an initial bandwidth part when k0 elapses.

In FIGS. 11 to 14, the transmission of the downlink data channel is shown, but the same can be applied to the uplink data channel transmission. That is, when the UL BWP switching for the UE is indicated through the UL grant DCI including the resource allocation information for the PUSCH, the UE transmits the UL BWP to the UE 100 based on the slot on which the PDCCH including the DCI is received. The UL BWP switching time can be derived. From the slot in which the PDCCH is received, the existing UL BWP can be deactivated after j slots and the new UL BWP indicated by the BIF included in the UL grant DCI can be activated. Here, the UL BWP switching time j value may be determined by the capacity of the UE.

Also, the UE may be configured not to transmit the PUCCH or PUSCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the BWP switching time according to the BWP switching time. Or whether the PUCCH or PUSCH can be transmitted through the existing BWP during the BWP switching time is set by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or may be determined by the terminal capability.

In addition, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PUSCH transmission time point If the gap (e.g., k2 value) does not guarantee the BWP switching time related capability indicated by the UE, the UE may not perform BWP switching according to the DCI indication.

In this case, as described above, the terminal can maintain the existing active bandwidth part, convert to a predetermined default bandwidth part, or switch to the initial bandwidth part, and the receiving part 1530 can receive, via the active bandwidth part, And receive the data channel for the uplink.

The base station can transmit and receive a data channel with the terminal when a new bandwidth part indicated by the value of the bandwidth part indication field according to the switching time is activated. According to this, it is possible to switch the bandwidth part efficiently according to the capacity of the terminal.

The transmitter 1520 and the receiver 1530 can transmit and receive a data channel with the terminal when a new bandwidth part indicated by the value of the bandwidth part indication field is activated according to the switching time described above. According to this, it is possible to switch the bandwidth part efficiently according to the capacity of the terminal.

According to the present specification, each operation by the base station can be performed in a specific other terminal. In this case, according to one embodiment, the contents described with reference to FIG. 6 can be applied substantially equally between a terminal and another terminal.

16 is a diagram illustrating a configuration of a terminal according to the present embodiments.

16, the terminal 1600 includes a receiving unit 1610, a controller 1620, and a transmitting unit 1630.

The control unit 1620 may control the overall operation of the terminal for transmitting and receiving the data channel. The transmission unit 1630 and the reception unit 1610 are used to transmit and receive signals, messages, and data necessary for carrying out the present invention to and from the base station.

Receiver 1610 may receive bandwidth part (BWP) configuration information for a bandwidth part set comprised of one or more bandwidth parts set for the terminal. At this time, the above-described bandwidth part setting information may include index information indicating a bandwidth part of each of the bandwidth partsets, for a bandwidth part set composed of one or more bandwidth parts set for the terminal.

The transmitter 1630 may transmit physical layer capability information including bandwidth part switching delay type information to the base station. According to one example, the bandwidth part switching delay (BWP switching delay), which is the time taken to convert a bandwidth part used for transmitting and receiving a data channel to another bandwidth part, can be determined by the capability of the terminal. Depending on the capacity of the terminal, the terminal may be classified into any one of a predetermined bandwidth part switching delay type divided into at least two types.

That is, when downlink bandwidth part switching (DL BWP switching) is instructed to the UE through the DCI, the controller 1620 controls the downlink bandwidth part switching time of the UE based on the slot on which the PDCCH including the DCI is received (DL BWP switching time) can be derived. According to one example, depending on the derived bandwidth part switching time, the switching delay type of the terminal may be determined.

For example, in a (n + k) th slot where k slots have elapsed, the PDCCH including the DCI is received at an arbitrary nth slot, the existing active DL BWP is deactivated and the DL assignment DCI Lt; RTI ID = 0.0 &gt; BWP &lt; / RTI &gt; In this case, according to one example, k, the time taken to switch the downlink bandwidth part, may be determined by the capability of the terminal.

In this manner, when the BWP switching time is determined by the capability of the terminal, the transmitter 1530 can transmit the capability value of the terminal for setting the bandwidth part switching time to the base station.

In the above description, the capability value of the terminal is transmitted to the base station in order to switch the bandwidth part used for communication between the terminal and the base station. However, the present invention is not limited to this. According to an example, the transmitter 1630 may transmit the capability value of the terminal to another terminal in order to switch the bandwidth part used for communication with the other terminal.

The reception unit 1610 includes a bandwidth part indication field for indicating one of the one or more bandwidth parts different from the active bandwidth part of one or more bandwidth parts included in the bandwidth parts set in the terminal, Control information can be received from the base station. According to one example, the bandwidth part indicated by the bandwidth part indicator field (BIF) may be set to one at a specific time step. According to an example, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the UE can be set up to N (N is a natural number equal to or greater than 1), respectively.

The receiving unit 1610 may receive a bandwidth part indication field indicating the part of the bandwidth to be used for transmission / reception of the data channel among the bandwidth parts included in the bandwidth part set configured in the UE, through the scheduling DCI.

According to an example, downlink bandwidth part switching may be indicated via a DL assignment DCI including resource allocation information for the PDSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include a DL bandwidth part indication field (DL BIF) for downlink bandwidth part switching.

Whether to include the DL BIF can be determined by the DL assignment DCI format. That is, the DL BIF can be included only for the DCI format 1_0 and the DCI format 1_1 of the DCI format 1_1, which are DCI formats that the UE should monitor to receive the PDSCH scheduling control information for the UE having one or more bandwidth parts. 9, the receiver 1610 can receive a DCI format 1_1 including scheduling information for the DL BIF and the PDSCH from the base station.

Alternatively, uplink bandwidth part switching may be indicated through an uplink grant (DC grant) including resource allocation information for the PUSCH. In this case, the DL assignment DCI format configured to be monitored by the UE may include an UL bandwidth part indication field (UL BIF) for uplink bandwidth part switching.

The inclusion of the UL BIF may be determined by the UL grant DCI format. That is, the UL BIF can be included only for the DCI format 0_0 and the DCI format 0_1 among the DCI format 0_1, which is a DCI format to be monitored by the terminal for receiving the PUSCH scheduling control information for a terminal having one or more bandwidth parts. Referring to FIG. 10, the receiver 1610 can receive a DCI format 0_1 including scheduling information on the UL BIF and the PUSCH from the base station.

According to one example, the bandwidth part indication field (BIF) may be determined according to an N value, which is the number of bandwidth parts included in the bandwidth part set configured for the terminal in the serving cell, The BIF can indicate the index (index, 00, 01, 10, 11) of the BWP that is composed of log ₂ (N) bits and is activated. Or BIF is configured with log ₂ (N + 1) bits to indicate the BWP index to be newly activated at the time of BWP switching, as well as to indicate the current active BWP to be maintained ) (E.g., all of the log ₂ (N + 1) bits are '0').

Alternatively, if the number of bandwidth parts configured for the terminal is less than or equal to 3 (N = <3), the BIF is configured with log ₂ (N + 1) bits, , And BIF may be composed of log ₂ (N) bits. That is, it can be composed of 1 bit when N is 1, 2 bits when N is 2, 2 bits when N is 3, and 2 bits when N is 4.

In the above description, the receiving unit 1610 receives the BIF indicating the bandwidth part to be newly activated from the base station for the switching of the bandwidth part, but the present invention is not limited thereto. According to an example, the receiving unit 1610 may receive a BIF indicating a bandwidth part to be newly activated from another terminal that has transmitted the capability value of the terminal.

The controller 1620 may activate the bandwidth part indicated by the value of the bandwidth part indication field and control the transmitting part 1630 and the receiving part 1610 to transmit and receive the data channel through the active bandwidth part.

When DL bandwidth part switching for the UE is instructed through the DCI, the controller 1620 can derive the downlink bandwidth part switching time of the UE based on the slot on which the PDCCH including the DCI is received. Referring to FIG. 11, the controller 1620 may deactivate the existing DL BWP after k slots from the slot in which the PDCCH is received, and activate the new DL BWP indicated by the DL assignment DCI. The BWP switching time, i.e. the BWP transition time k, may be determined by the capabilities of the terminal.

According to another example, the controller 1620 transmits time domain PDSCH resource allocation information (for example, DL assignment DCI and PDSCH transmission / reception) transmitted through the DL assignment DCI to the terminal that received the DL assignment DCI through an arbitrary nth slot (N + k1) slot according to the timing relationship setting information between the DL assignment set by the RRC signaling and the PDSCH transmission according to the RRC signaling, It is possible to perform DL BWP switching in an n + k1-k2 slot before an arbitrary k2 slot as a reference. For example, if k2 = 0, the controller 1620 can deactivate the existing DL BWP from the PDSCH transmission slot and activate the new DL BWP indicated by the DL assignment DCI.

In this case, the value of k2 may be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the transmitter 1630 can transmit a capability value for setting the BWP transition time to the base station.

Similarly, when the base station instructs the UL bandwidth part switching for the UE through the UL grant DCI including the resource allocation information for the PUSCH, the controller 1620 receives the PDCCH including the DCI The uplink bandwidth part switching time of the UE can be derived based on the slot formed. The controller 1620 may deactivate the existing UL BWP from the j slot after receiving the PDCCH and activate the new UL BWP indicated by the UL grant DCI. Here, the bandwidth part switching time j value may be determined by the capacity of the UE.

According to another example, time domain PDSCH resource allocation information transmitted through the UL grant DCI (for example, timing gap between the UL grant DCI and the PUSCH transmission / reception timing gap setting information) or a PUSCH transmission slot according to the timing relationship setting information between the UL grant set by the RRC signaling and the corresponding PUSCH transmission is n + j1 slots, an arbitrary j2 DL BWP switching can be performed in the n + k1-j2 slot before the slot. For example, if j2 = 0, the controller 1620 may deactivate the existing UL BWP from the PUSCH transmission slot and activate the new UL BWP indicated by the UL grant DCI.

In this case, the j2 value can be determined by the capacity of the terminal. When the BWP switching time is determined by the capability of the terminal, the transmitter 1630 can transmit a capability value for setting the BWP transition time to the base station.

According to one embodiment, when the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, the controller 1620 can maintain the activation of the currently active bandwidth part have.

That is, as shown in FIG. 12, a timing gap (for example, k0 value) between the DCI reception time point indicated by the scheduling information included in the DCI and the reception time point of the data channel is indicated by the terminal If the BWP switching time (k) related capability can not be guaranteed, the controller 1620 may not perform the BWP switching according to the DCI instruction. In this case, according to an example, the receiver 1610 can receive the data channel from the point in time when the k0 slot defined by the scheduling information elapses, while maintaining the previous bandwidth part.

In addition, according to one embodiment, when the transmission time of the data channel according to the scheduling information is before the BWP switching time elapses based on the reception time of the downlink control information, a predetermined default bandwidth part (default BWP Can be activated. 13, when the value of k0, which is the timing gap between the DCI reception timing point and the data channel reception timing pointed by the scheduling information included in the DCI, is ahead of the BWP switching time k indicated by the terminal, The BS 1620 may not perform the BWP switching according to the DCI instruction.

In this case, the control unit 1620 can activate a predetermined default bandwidth part. According to one example, when switched over with a default slot bandwidth k slots, the transmitter 1630 may send information to the base station that it is capable of receiving a data channel, or may request a DCI containing new scheduling information for the data channel have.

Alternatively, according to another example, the switching time kd to the default bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if kd is faster than k0, the control unit 1620 can switch to the default bandwidth part at a time point kd elapses after PDCCH reception, unlike that shown in Fig.

In addition, according to one embodiment, when the transmission time of the data channel according to the scheduling information is before the switching time based on the reception time of the downlink control information, the controller 1620 sets the initial bandwidth part initial BWP). 14, when the value of k0, which is the timing gap between the DCI reception time point and the data channel reception time point indicated by the scheduling information included in the DCI, is ahead of the BWP switching time k indicated by the terminal, The BS 1620 may not perform the BWP switching according to the DCI instruction.

In this case, the controller 1620 may activate the initial bandwidth part. According to one example, when the k-th slot is switched to the initial bandwidth part, the transmitter 1630 may transmit information indicating that the base station can receive the data channel or request a DCI including new scheduling information for the data channel have.

Alternatively, according to another example, the switching time ki to the initial bandwidth part as the capability of the terminal may be set to be shorter than the normal BWP switching time k. In this case, if ki is faster than k0, the control unit 1620 can switch to the initial bandwidth part at the point in time after ki after PDCCH reception, unlike that shown in Fig.

In FIGS. 11 to 14, the transmission of the downlink data channel is shown, but the same can be applied to the uplink data channel transmission. That is, when the UL BWP switching for the UE is indicated through the UL grant DCI including the resource allocation information for the PUSCH, the controller 1620 allocates a slot to which the PDCCH including the DCI is received The UL BWP switching time of the UE can be derived. The controller 1620 may deactivate the existing UL BWP from the j slot after receiving the PDCCH and activate the new UL BWP indicated by the BIF included in the UL grant DCI. Here, the UL BWP switching time j value may be determined by the capacity of the UE.

Also, the controller 1620 may be configured not to transmit the PUCCH or PUSCH through the existing UL BWP during the DCI reception time including the BWP switching indication information and the corresponding BWP switching time. Or whether the PUCCH or PUSCH can be transmitted through the existing BWP during the BWP switching time is set by the base station through RRC signaling, MAC CE signaling or L1 control signaling, or may be determined by the terminal capability.

In addition, when the BWP switching time is determined by the terminal capability, a timing gap between the DCI reception time point indicated by the time domain resource assignment information indicated by the DCI and the corresponding PUSCH transmission time point the controller 1620 may not perform the BWP switching according to the instruction of the DCI when the gap (e.g., k2 value) does not guarantee the BWP switching time related capability indicated by the terminal.

In this case, as described in FIGS. 12-14, the control unit 1620 can maintain an existing active bandwidth part, convert to a predetermined default bandwidth part, or switch to an initial bandwidth part. The transmitter 1630 can transmit the data channel for the uplink through the activated bandwidth part.

The control unit 1620 can transmit and receive a data channel with the base station by activating a new bandwidth part indicated by the value of the bandwidth part indication field according to the switching time described above. According to this, it is possible to switch the bandwidth part efficiently according to the capacity of the terminal.

In the above description, the controller 1620 activates the newly designated bandwidth part between the terminal and the base station and controls the transmission and reception of the data channel. However, the present invention is not limited to this. According to an example, the control unit 1620 can activate a newly designated bandwidth part with another terminal and control transmission / reception of a data channel.

The standard content or standard documents referred to in the above-mentioned embodiments constitute a part of this specification, for the sake of simplicity of description of the specification. Therefore, it is to be understood that the content of the above standard content and portions of the standard documents are added to or contained in the scope of the present invention.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (24)

A method for switching a bandwidth part to reduce power consumption during transmission and reception of wireless data in a terminal,
Transmitting physical layer capability information including a bandwidth part (BWP) switching delay type information;
A bandwidth part indicator field indicating a bandwidth part different from the active bandwidth part of one or more bandwidth parts included in a bandwidth part set configured at the terminal, and scheduling information for a data channel Receiving downlink control information including the uplink control information;
Activating a bandwidth part indicated according to a value of the bandwidth part indication field in consideration of a transition time determined according to the bandwidth part switching delay type information; And
Transmitting and receiving the data channel according to the scheduling information,
Wherein the bandwidth part indicated according to the value of the bandwidth part indication field is determined by reflecting the traffic load of the terminal. The method according to claim 1,
The bandwidth part, indicated by the value of the bandwidth part indication field,
Wherein the power consumption of the terminal is determined based on power consumption due to the traffic load during data transmission / reception in the uplink and the downlink of the terminal. 3. The method of claim 2,
The bandwidth part, indicated by the value of the bandwidth part indication field,
Characterized in that the power consumption of the one or more bandwidth parts included in the bandwidth part set configured in the terminal is determined as the bandwidth part with the lowest power consumption. A method for switching a bandwidth part to reduce power consumption when a base station transmits and receives wireless data,
Receiving physical layer capability information including bandwidth part switching delay type information from a terminal;
Determining a bandwidth part indication field indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth part set configured to the terminal, reflecting the traffic load of the terminal;
Transmitting downlink control information including scheduling information for the bandwidth part indication field and the data channel to the UE; And
And transmitting and receiving the data channel according to the scheduling information when a bandwidth part instructed according to a value of the bandwidth part indication field is activated in consideration of a switching time determined according to the bandwidth part switching delay type information. 5. The method of claim 4,
The bandwidth part, indicated by the value of the bandwidth part indication field,
Wherein the power consumption of the terminal is determined based on power consumption due to the traffic load during data transmission / reception in the uplink and the downlink of the terminal. 6. The method of claim 5,
The bandwidth part, indicated by the value of the bandwidth part indication field,
Characterized in that the power consumption of the one or more bandwidth parts included in the bandwidth part set configured in the terminal is determined as the bandwidth part with the lowest power consumption. In a method for a terminal to switch a bandwidth part,
Transmitting physical layer capability information including bandwidth part switching delay type information;
Receiving a downlink control information including scheduling information for a bandwidth part indication field and a data channel indicating one of the one or more bandwidth parts different from the active bandwidth part of one or more bandwidth parts included in the bandwidth part configured in the terminal step;
Activating a bandwidth part indicated by the value of the bandwidth part indication field in consideration of a switching time determined according to the bandwidth part switching delay type information; And
And transmitting and receiving the data channel according to the scheduling information. 8. The method of claim 7,
The bandwidth part indication field includes:
And a number of bits determined according to the number of bandwidth parts included in the bandwidth part set constituted by the bandwidth part setting information received via the upper layer signaling. 9. The method of claim 8,
The bandwidth part indication field includes:
The bandwidth when the number of parts N, characterized in that the log ₂ (N) bits or log crystal ₂ (N + 1) bits. 9. The method of claim 8,
The downlink control information includes:
Wherein whether to include the bandwidth part indication field is determined according to a downlink control information format (DCI format). 8. The method of claim 7,
Wherein activating the indicated bandwidth part according to the value of the bandwidth part indication field comprises:
And a bandwidth part indicated by the value of the bandwidth part indication field when the transmission time of the data channel according to the scheduling information is after the switching time has elapsed based on the reception time of the downlink control information Lt; / RTI &gt; 12. The method of claim 11,
Wherein activating the indicated bandwidth part according to the value of the bandwidth part indication field comprises:
Wherein the activation of the active bandwidth part is maintained when the transmission time of the data channel according to the scheduling information is before the switching time has elapsed based on the reception time of the downlink control information. In a method for a base station to switch bandwidth parts,
Receiving physical layer capability information including bandwidth part switching delay type information from a terminal;
Determining a bandwidth part indication field indicating one of the one or more bandwidth parts different from the active one of the one or more bandwidth parts included in the bandwidth part set configured at the terminal;
Transmitting downlink control information including scheduling information for the bandwidth part indication field and the data channel to the UE; And
And transmitting and receiving the data channel according to the scheduling information when a bandwidth part instructed according to a value of the bandwidth part indication field is activated in consideration of a switching time determined according to the bandwidth part switching delay type information. 14. The method of claim 13,
The bandwidth part indication field includes:
And a number of bits determined according to the number of bandwidth parts included in the bandwidth part set constituted by the bandwidth part setting information transmitted from the base station through higher layer signaling. 15. The method of claim 14,
The bandwidth part indication field includes:
The bandwidth when the number of parts N, characterized in that the log ₂ (N) bits or log crystal ₂ (N + 1) bits. 14. The method of claim 13,
The downlink control information includes:
Wherein whether to include the bandwidth part indication field is determined according to a downlink control information format (DCI format). 14. The method of claim 13,
The transmitting and receiving of the data channel includes:
If the transmission time of the data channel according to the scheduling information is after the elapse of the switching time based on the reception time of the downlink control information and the bandwidth part indicated by the value of the bandwidth part indication field is activated, And transmitting and receiving the channel. 18. The method of claim 17,
The transmitting and receiving of the data channel includes:
When the transmission time of the data channel according to the scheduling information is before the switching time elapses based on the reception time of the downlink control information, the data channel is transmitted / received through the bandwidth part in which the activation is maintained. How to. A terminal for switching a bandwidth part,
A transmission unit for transmitting physical layer capability information including bandwidth part switching delay type information;
Receiving a downlink control information including scheduling information for a bandwidth part indication field and a data channel indicating one of the one or more bandwidth parts different from the active bandwidth part of one or more bandwidth parts included in the bandwidth part configured in the terminal A receiving unit; And
Wherein the control unit activates the bandwidth part indicated by the value of the bandwidth part indication field in consideration of the switching time determined according to the bandwidth part switching delay type information and transmits the data channel according to the scheduling information, And a control unit for controlling the terminal. 20. The method of claim 19,
The bandwidth part indication field includes:
And a number of bits determined according to the number of bandwidth parts included in the bandwidth part set configured by the bandwidth part setting information received through the upper layer signaling. 21. The method of claim 20,
The bandwidth part indication field includes:
If the number of the bandwidth parts N, log ₂ (N) bits or log ₂ (N + 1) bits, it characterized in that the terminal is determined. 20. The method of claim 19,
The downlink control information includes:
And determining whether to include the bandwidth part indication field according to a downlink control information format (DCI format). 20. The method of claim 19,
Wherein,
And a bandwidth part indicated according to the value of the bandwidth part indication field if the transmission time of the data channel according to the scheduling information is after the switching time has elapsed based on the reception time of the downlink control information . 24. The method of claim 23,
Wherein,
Wherein the activation of the active bandwidth part is maintained when the transmission time of the data channel according to the scheduling information is before the switching time has elapsed based on the reception time of the downlink control information.

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