KR102114919B1 - Method for scheduling data channel in new radio and Apparatuses thereof - Google Patents

Abstract

The present embodiments are directed to a method and apparatus for scheduling a data channel to support a terminal using various bandwidth parts in a next generation/5G radio access network. In one embodiment, the terminal receives a downlink data channel or uplinks. A method for transmitting a data channel, the method comprising: receiving bandwidth part (BWP, bandwidth part) setting information for a bandwidth part set consisting of one or more bandwidth parts set for the terminal from a base station and the bandwidth set by the bandwidth part setting information; And receiving, from the base station, downlink control information including information indicating one of the one or more bandwidth parts included in the bandwidth part set, and downlink data through one bandwidth part indicated by the downlink control information. It provides a method characterized by receiving a channel or transmitting an uplink data channel.

Description

Method and device for scheduling data channel in next-generation wireless network {Method for scheduling data channel in new radio and Apparatuses thereof}

The present embodiments propose a method and apparatus for scheduling a data channel to support a terminal using various bandwidth parts in a next generation/5G radio access network (hereinafter referred to as "NR [New Radio]").

3GPP recently approved "Study on New Radio Access Technology", a study item for research on next-generation/5G radio access technology, and based on this, RAN WG1 has a frame structure, channel coding, and modulation for NR (New Radio), respectively. , Waveform and multiple access methods are being discussed. NR is required to be designed to satisfy various demands required for each segmented and specific usage scenario as well as improved data rates in preparation for LTE/LTE-Advanced.

As a representative usage scenario of NR, enhancement mobile BroadBand (eMBB), massive machine type communication (mMTC) and ultra reliable and low latency communications (URLLC) are proposed, and LTE/LTE-Advanced compared to meet the needs of each usage scenario It is desired to design a flexible frame structure.

Particularly, when a terminal of the NR uses various bandwidth parts (BWP), there is an increasing need for a terminal to set a specific and efficient method for scheduling a data channel based on the aforementioned bandwidth part.

The purpose of the embodiments is to provide a specific method for setting and activating a bandwidth part for data channel transmission and reception between a terminal and a base station in a next generation wireless network.

In an embodiment devised to solve the above-described problem, in a method in which a terminal receives a downlink data channel or transmits an uplink data channel, a bandwidth part set consisting of one or more bandwidth parts set for the terminal from a base station The base station transmits downlink control information including information indicating one of one or more bandwidth parts included in the bandwidth part set set by the bandwidth part setting information and the step of receiving bandwidth part (BWP, bandwidth part) setting information for Provides a method comprising receiving from, but receiving a downlink data channel or transmitting an uplink data channel through one bandwidth part indicated by the downlink control information.

In addition, according to an embodiment of the present invention, in a method in which a base station transmits a downlink data channel or receives an uplink data channel, a bandwidth part (BWP) for a bandwidth part set consisting of one or more bandwidth parts set for a terminal Transmitting the configuration information to the terminal and transmitting downlink control information including information indicating one of the one or more bandwidth parts included in the bandwidth part set set by the bandwidth part configuration information to the terminal, Provided is a method for transmitting a downlink data channel or receiving an uplink data channel through one bandwidth part indicated by downlink control information.

In addition, in one embodiment, in a terminal that receives a downlink data channel or transmits an uplink data channel, a bandwidth part (BWP) for a bandwidth part set consisting of one or more bandwidth parts set for the terminal from the base station ) A receiving unit receiving configuration information and receiving downlink control information from the base station including information indicating one of the one or more bandwidth parts included in the bandwidth part set set by the bandwidth part configuration information. It provides a terminal characterized in that it receives a downlink data channel or transmits an uplink data channel through one bandwidth part indicated by the link control information.

In addition, an embodiment of the base station for transmitting a downlink data channel or receiving an uplink data channel, consisting of one or more bandwidth parts set for the control unit and the terminal configuring the bandwidth part (BWP, bandwidth part) setting information A downlink including information indicating one of one or more bandwidth parts included in the bandwidth part set set by the bandwidth part set information, and transmitting bandwidth part (BWP, bandwidth part) setting information for the bandwidth part set to the terminal It provides a base station characterized in that it comprises a transmitter for transmitting control information to the terminal, but transmits a downlink data channel or receives an uplink data channel through one bandwidth part indicated by the downlink control information.

According to the present embodiments, a specific method of setting and activating a bandwidth part for transmitting and receiving a data channel between a terminal and a base station in a next generation wireless network can be provided.

FIG. 1 is a diagram illustrating alignment of OFDM symbols when different subcarrier spacings are used according to the present embodiments.
2 is a diagram illustrating a conceptual example of a bandwidth part in this embodiment.
FIG. 3 is a diagram illustrating a conceptual example of setting a UE-specific bandwidth part in this embodiment.
4 is a diagram illustrating a procedure in which a terminal receives a downlink data channel or transmits an uplink data channel in this embodiment.
5 is a diagram illustrating a procedure in which a base station transmits a downlink data channel or receives an uplink data channel in this embodiment.
6 is a diagram showing the configuration of a base station according to the present embodiments.
7 is a diagram showing the configuration of a terminal according to the present embodiments.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. It should be noted that in adding reference numerals to the components of each drawing, the same components have the same reference numerals as possible even though they are displayed on different drawings. In addition, in describing the present invention, when it is determined that detailed descriptions of related well-known structures or functions may obscure the subject matter of the present invention, detailed descriptions thereof will be omitted.

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

The user terminal is a comprehensive concept that refers to a terminal in wireless communication, user equipment (UE) in WCDMA, LTE, HSPA and IMT-2020 (5G or New Radio), as well as MS (Mobile Station) in GSM, UT It should be interpreted as a concept including (User Terminal), SS (Subscriber Station), and wireless devices.

Base station or cell (Cell) generally refers to a station (station) to communicate with the user terminal, Node-B (Node-B), eNB (evolved Node-B), gNB (gNode-B), LPN (Low Power Node) ), Sector, Site, Antenna of various types, Base Transceiver System (BTS), Access Point, Point (e.g., transmit point, receive point, transmit/receive point), relay node ( Relay Node), mega cell, macro cell, micro cell, pico cell, femto cell, remote radio head (RRH), radio unit (RU), and small cell (small cell).

Since the various cells listed above have a base station that controls each cell, the base station can be interpreted in two ways. 1) a device that provides a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, and a small cell in relation to the wireless area, or 2) the wireless area itself. In 1), all devices that provide a predetermined wireless area are controlled by the same entity or interact to configure the wireless area in a collaborative manner. Points, transmission/reception points, transmission points, reception points, and the like, according to a configuration method of a wireless area, are examples of a base station. In 2), the radio area itself, which receives or transmits a signal from the perspective of the user terminal or the neighboring base station, may be directed to the base station.

In this specification, a cell is a component carrier having a coverage of a signal transmitted from a transmission/reception point or a signal transmitted from a transmission/reception point, or a transmission/reception point itself. Can be.

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

Here, the uplink (Uplink, UL, or uplink) means a method of transmitting and receiving data to the base station by the user terminal, the downlink (Downlink, DL, or downlink) transmits and receives data to the user terminal by the base station Means the way.

For uplink transmission and downlink transmission, a time division duplex (TDD) method transmitted using different times may be used, and a frequency division duplex (FDD) method transmitted using different frequencies, a TDD scheme, and an FDD scheme Mixing methods can be used.

In addition, in a wireless communication system, a standard is configured by configuring an uplink and a downlink based on one carrier or a pair of carriers.

The uplink and downlink transmit control information through control channels such as PDCCH (Physical Downlink Control CHannel), PUCCH (Physical Uplink Control CHannel), and PDSCH (Physical Downlink Shared CHannel), PUSCH (Physical Uplink Shared CHannel), etc. It consists of the same data channel and transmits data.

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

Hereinafter, a situation in which signals are transmitted/received through channels such as PUCCH, PUSCH, PDCCH and PDSCH is also described in the form of'transmit and receive PUCCH, PUSCH, PDCCH and PDSCH'.

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

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

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

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

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

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

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

As a representative usage scenario in New Radio (NR), which is currently being discussed in 3GPP, enhanced Mobile BroadBand (eMBB), Massive Machine Type Communication (mMTC), and Ultra Reliable and Low Latency Communication (URLLC) have been proposed.

In this specification, frequency, frame, subframe, resource, resource block, region, band, subband, control channel, data channel, synchronization signal, various reference signals, various signals, various messages related to NR (New Radio) Can be interpreted as meaning used in the past or present or various meanings used in the future.

NR (New Radio)

3GPP recently approved "Study on New Radio Access Technology", a study item for research on next-generation/5G radio access technology, and based on this, frame structure, channel coding and modulation for NR (New Radio), waveform and Discussion of a frame structure, channel coding & modulation, waveform & multiple access scheme, etc. has begun.

NR is required to be designed to satisfy various requirements required for each segmented and specific usage scenario, as well as an improved data rate compared to LTE/LTE-Advanced. In particular, as a representative usage scenario of NR, enhancement mobile BroadBand (eMBB), massive MTC (mMTC), and ultra reliable and low latency communications (URLLC) have been raised, and requirements for each usage scenario are requested. As a method for satisfying, a flexible frame structure design compared to LTE/LTE-Advanced is required.

Specifically, eMBB, mMTC, and URLLC are considered as representative usage scenarios of NR under discussion in 3GPP. Since each usage scenario has different requirements for data rates, latency, and coverage, each usage scenario is used through a frequency band constituting an arbitrary NR system. Efficient multiplexing of radio resource units based on different numerology (eg subcarrier spacing, subframe, TTI, etc.) as a method for efficiently satisfying the requirements for each scenario There is a need for a way to (multiplexing).

As a method for this, multiplexing is supported based on TDM, FDM or TDM/FDM through one NR carrier for numerology having different subcarrier spacing (SCS) values. Discussion has been made of a method and a method of supporting one or more time units in configuring a scheduling unit in a time domain. In this regard, in NR, a subframe is defined as a type of time domain structure, and a reference numerology for defining a corresponding subframe duration. As it was decided to define a single subframe duration composed of 14 OFDM symbols of normal CP overhead based on 15 kHz SCS (Sub-Carrier Spacing), which is the same as LTE. Accordingly, the subframe in NR has a duration of 1 ms. However, unlike LTE, the subframe of NR is an absolute reference time duration, which is a time unit based on actual uplink/downlink data scheduling and a slot and a mini-slot. ) Can be defined. In this case, the number of OFDM symbols constituting the slot and the y value are determined to have a value of y=14 regardless of the neuromerology.

Accordingly, an arbitrary slot may consist of 14 symbols, and all symbols may be used for DL transmission or all symbols may be uplink transmitted according to a transmission direction of the corresponding slot. UL transmission), or may be used in the form of a DL portion + (gap) + UL portion.

In addition, a mini-slot consisting of fewer symbols than the corresponding slot is defined in a random numerology (or SCS), and based on this, a short-length time domain scheduling interval for transmitting/receiving uplink/downlink data (time-domain) The scheduling interval may be set, or a long-time time-domain scheduling interval for transmitting/receiving uplink/downlink data through slot aggregation may be configured.

In particular, in case of transmitting/receiving for latency critical data such as URLLC, a slot based on 0.5ms (7 symbols) or 1ms (14 symbols) defined in a numerology based frame structure having a small SCS value such as 15 kHz. When scheduling is performed in units, it may be difficult to satisfy the latency requirement, so for this, a mini-slot consisting of fewer OFDM symbols than the corresponding slot is defined and based on this, the corresponding URLLC It can be defined such that scheduling is performed for delay critical data.

Alternatively, as described above, by supporting multiplexed neuromerrollers having different SCS values in one NR carrier by TDM or FDM scheme, based on the defined slot (or mini-slot) length for each neuromerroller A method of scheduling data according to a latency requirement is also considered. For example, when the SCS is 60 kHz as shown in FIG. 1, the length of the symbol is reduced to about 1/4 compared to the case of the SCS 15 kHz, so when one slot is composed of 7 OFDM symbols, the corresponding 15 kHz-based slot length is While being 0.5ms, the slot length based on 60kHz is reduced to about 0.125ms.

As such, in NR, discussions are being made on how to satisfy the requirements of URLLC and eMBB by defining different SCS or different TTI lengths.

Wider Wider bandwidth operations

In the case of the existing LTE system, a scalable bandwidth operation for any LTE component carrier (CC) was supported. That is, according to the frequency deployment scenario (deployment scenario), any LTE operator can configure a single LTE CC, and can configure a minimum bandwidth of 1.4 MHz to a maximum of 20 MHz, and accordingly, any normal LTE terminal can receive one For LTE CC, 20 MHz bandwidth transmit/receive capability was supported.

However, in the case of NR, the design is made to support NR terminals having different transmit/receive bandwidth capabilities in one NR CC, and accordingly, as shown in FIG. 2 below, any NR CC By configuring one or more bandwidth parts (BWP, bandwidth part) composed of subdivided bandwidth, flexible bandwidth is set through activation and activation of different bandwidth parts for each terminal (wider bandwidth operation) ).

As such, any NR CC may be divided into one or more bandwidth parts, and accordingly, one or more bandwidth parts may be configured in each terminal, and one or more bandwidths configured for any terminal It may be defined to perform transmission/reception of an uplink/downlink radio signal and a radio channel for a corresponding terminal through activation of one or more bandwidth parts of a bandwidth part.

In addition, when a plurality of numerology (numerology (eg SCS, CP length, etc.)) is supported in an arbitrary NR CC, different numerology for transmission/reception is performed for each bandwidth part. Can be set.

As described above, any NR component carrier (CC) may be composed of one or more bandwidth parts. In configuring a bandwidth part in any NR CC, the corresponding bandwidth part may be configured to be UE-specific or to be cell-specific. . That is, as illustrated in FIG. 3, different bandwidth parts may be set for each terminal, or the same bandwidth part may be set for all terminals for an arbitrary NR CC. However, FIG. 3 is only an example, and the present embodiment is not limited by specific bandwidths of NR CCs and bandwidths for each bandwidth part.

When a bandwidth part is configured for an arbitrary NR CC, activation of a downlink bandwidth part for PDSCH/PUSCH transmission and reception between a base station and a terminal among configured bandwidth parts is performed, and The uplink/downlink bandwidth part for communication between the UE and the base station is set at an arbitrary time instance through activation of the uplink bandwidth part for PUCCH/PUSCH transmission/reception. Can be.

Specifically, one or more bandwidth parts may be set for any UE in any NR CC. As an example of a method for setting a bandwidth part for a certain terminal, an independent bandwidth part is set for a downlink bandwidth part and an uplink bandwidth part. Can be. Accordingly, among the one or more downlink bandwidth parts set for an arbitrary terminal, any terminal through the one or more downlink bandwidth parts activated by a base station/network is used for a downlink physical signal and It is possible to perform reception for a physical channel. Similarly, among one or more uplink bandwidth parts set for an arbitrary terminal, the terminal transmits uplink physical signals and physical signals to the base station through one or more uplink bandwidth parts activated by a base station/network. Transmit the channel.

The embodiments described below can 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 a mobile communication terminal to which LTE technology is applied, but also to a next generation mobile communication (5G mobile communication, New-RAT) terminal, a base station, and an access and mobility function (AMF). In the following description, for convenience of description, the base station may represent an eNB of LTE/E-UTRAN, and a base station (CU, DU, or CU and DU) in a 5G wireless network in which a central unit (CU) and a distributed unit (DU) are separated. It may refer to an entity implemented as a logical entity), gNB.

In addition, the numerology (numerology) described in this specification means the numerical characteristics and the meaning of the numerical values for data transmission and reception, and may be determined by the value of subcarrier spacing (hereinafter, also referred to as SCS or subcarrier spacing). . Therefore, the difference in numerology may mean that the subcarrier spacing that determines the numerology is different.

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

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

Hereinafter, a specific bandwidth part activation method for supporting PDSCH/PUSCH scheduling based on a bandwidth part in an arbitrary NR CC and a method of configuring scheduling control information based on the same, more various implementations An example will be described in detail. The embodiments described below may be applied individually or in any combination.

Example 1. Bandwidth part Details on bandwidth part activation

For a downlink bandwidth part set for an arbitrary UE, a base station/network can be defined to support a bandwidth part common activation for all downlink physical signals and physical channels. have. That is, any UE is connected to 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 a base station/network. You can expect to receive. The activated bandwidth part may be referred to as an active bandwidth part.

However, in this case, the UE performs monitoring for 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.

Additionally, activation of a corresponding DL bandwidth part may be defined to be performed through MAC CE signaling or L1 control signaling. Alternatively, activation of the corresponding DL bandwidth part may be defined to be performed through UE-specific/cell-specific higher layer signaling.

As another method for DL bandwidth part activation for any UE, one or more DL bandwidth parts for PDCCH reception including scheduling DCI and one or more DL bandwidth parts for PDSCH reception (bandwidth part) can be defined to be separately set and activated (activation) by the base station / network. That is, a bandwidth part for PDSCH reception separately from activation for DL bandwidth part for PDCCH reception among a set of DL bandwidth parts set for an arbitrary UE It can be defined to activate.

As an embodiment of this, MAC CE signaling of one or more bandwidth parts including a CORESET to be monitored for PDCCH reception at a corresponding terminal among bandwidth parts set for a certain terminal in a base station/network It can be defined to activate through. That is, among the DL bandwidth parts set for an arbitrary UE, monitoring for PDCCH reception at the corresponding UE, that is, the DL bandwidth part including the at least one or more CORESET is MAC by the base station/network. It may be defined to be activated through CE signaling or L1 control signaling.

In addition, a DL bandwidth part for PDSCH transmission/reception, ie, a DL bandwidth part for PDCCH reception, described above, is obtained separately from DL bandwidth part activation for corresponding PDCCH reception. DL assignment transmitted through DL assignment The DL bandwidth part for PDSCH transmission and reception through which DCSCH resource allocation can be made may be activated by a base station/network. At this time, the DL bandwidth part for receiving the PDSCH is activated through a separate information area of the same MAC CE signaling or L1 control signaling as the DL bandwidth part for receiving the PDCCH, or It may be defined to be activated through separate MAC CE signaling or L1 control signaling (eg, DL assignment DCI).

As another method of separately setting or activating a bandwidth part for PDCCH reception and activating a bandwidth part for PDSCH reception, a bandwidth part for PDCCH reception part) is defined to be set 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 DL assignment DCI or MAC CE signaling or a combination of the corresponding MAC CE signaling and DL assignment DCI.

Specifically, a DL bandwidth part for receiving a PDCCH in an arbitrary UE is UE-specific higher layer signaling or cell-specific higher layer signaling. signaling), and can be defined to be made implicit through control resource set (CORESET) settings for the corresponding terminal.

That is, when information such as a bandwidth part or a frequency resource and a monitoring cycle to be monitored for PDCCH reception is set in a corresponding terminal through a CORESET setting for receiving the PDCCH of the corresponding terminal, the corresponding terminal sets the corresponding setting information According to this, it can be defined that activation is performed on a bandwidth part in which a corresponding CORESET is set in a corresponding monitoring cycle. In addition, when activating the bandwidth part for PDSCH reception, the corresponding PDSCH transmission resource is explicitly or implicitly through DL assignment DCI transmitted through the PDCCH. It can be defined to be indicated (indication) for the bandwidth part (bandwidth part) to which the allocation is made, and through this, it can be defined to activate the DL bandwidth part (bandwidth part) for receiving the corresponding PDSCH.

A concept similar to that of the aforementioned downlink may be applied to activation of an uplink bandwidth part for an arbitrary terminal. That is, activation of a common UL bandwidth part that is commonly applied to PUSCH and PUCCH may be defined to be supported. That is, any terminal may be defined to enable transmission of PUCCH and PUSCH through all uplink bandwidth parts activated by a base station/network. At this time, activation of the common UL bandwidth part may be defined to be performed through MAC CE signaling or L1 control signaling. Alternatively, the common UL bandwidth part activation may be defined to be performed through UE-specific or cell-specific higher layer signaling. Can be.

As another method for activating an uplink bandwidth part for any terminal, PUSCH and PUCCH when activating the UL bandwidth part for any terminal in a base station/network For each, a separate UL bandwidth part may be defined to be activated. In other words, among a set of UL bandwidth parts set for an arbitrary UE, a bandwidth part for PUCCH transmission and a bandwidth part for PUSCH transmission are defined to be activated separately. 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, the bandwidth part for any terminal in any base station/network When activating ), separately set UL bandwidth part for PUCCH resource allocation for UCI (Uplink Control Information) transmission and UL bandwidth part for PUSCH resource allocation for data transmission. And can be defined to activate. However, when the UCI is piggybacked through the PUSCH and transmitted, the UCI may be defined to be transmitted through an activated UL bandwidth part for PUSCH transmission.

At this time, the UL bandwidth part for the corresponding PUSCH and the UL bandwidth part for the PUCCH are the same MAC CE signaling or L1 control signaling (eg DL assignment DCI, UL grant) ), etc.) or activation through a separate MAC CE signaling or L1 control signaling (eg, DL assignment DCI, UL grant, etc.). ).

As another method for separately activating the UL bandwidth part for PUCCH transmission and the UL bandwidth part for PUSCH transmission, the UL bandwidth part for PUCCH transmission is a terminal. -Activated through UE-specific or cell-specific higher layer signaling or L1 control signaling, or corresponding UE-specific/cell-specific (UE-specific / It may be defined to be activated through a combination of cell-specific higher layer signaling and L1 control signaling. In addition, the UL bandwidth part for PUSCH transmission is UE-specific/cell separate from signaling used for activation of the UL bandwidth part for PUCCH described above. It can be defined to be activated through -specific higher layer signaling, MAC CE signaling, or L1 control signaling or a combination of corresponding signaling.

Specifically, the UL bandwidth part for PUCCH transmission and activation are set to UE-specific or cell-specific higher layer signaling for any UE. ) PUCCH resource configuration (resource configuration) through the implicit (implicit) is made (i.e., the PUCCH resource is set the bandwidth part (bandwidth part) is always or the PUCCH transmission cycle or timing is defined as activated (activation) or ), or defined to be implicitly activated (ie, L1 control signaling) through PUCCH resource indication through L1 control signaling such as DL assignment DCI, UL grant, etc. When a PUCCH transmission resource is allocated through, a bandwidth part in which the corresponding PUCCH transmission is performed may be defined as activated at the corresponding PUCCH transmission time).

In addition, the UL bandwidth part for PUSCH transmission is defined to include implicit or explicit UL bandwidth part allocation information for PUSCH transmission through UL grant, and corresponding UL grant. It can be defined to activate the UL bandwidth part for PUSCH transmission through the bandwidth part allocation information included in (grant).

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

Specifically, in the case of UL bandwidth part activation for SRS transmission, it may be defined to follow all UL bandwidth parts activated for PUCCH transmission or PUSCH transmission of the corresponding UE. . That is, regardless of the activation (activation) method of the PUSCH / PUCCH bandwidth part (bandwidth part) defined in the NR, through any UL bandwidth part (activation) activated for PUCCH or PUSCH transmission in any terminal It can be defined to enable SRS transmission in the corresponding terminal.

Specifically, for all UL bandwidth parts set for an arbitrary UE, configuration is made for periodic or aperiodic SRS transmission resources, and an arbitrary bandwidth part is generated. Defined to be capable of transmitting a set or indicated periodic or aperiodic SRS through an activated UL bandwidth part, at least when activated for PUCCH or PUSCH transmission. Can be.

Or, regardless of the activation (activation) of the UL bandwidth part (bandwidth part) for PUCCH/PUSCH transmission, and without the activation of a separate UL bandwidth part (bandwidth part) for SRS transmission, set for any terminal It may be defined to enable SRS transmission through all bandwidth parts.

Alternatively, the bandwidth part for SRS transmission is separately activated from the base station/network through MAC CE signaling or L1 control signaling, apart from the UL bandwidth part activated for transmission of the corresponding PUSCH/PUCCH. Can be defined as

Alternatively, in addition to the UL bandwidth part activated for PUSCH/PUCCH transmission, it may be defined to additionally set or activate the UL bandwidth part for SRS transmission in the base station/network. That is, it is defined to support SRS transmission through a UL bandwidth part activated for PUSCH/PUCCH transmission in any terminal, and activated for PUCCH/PUSCH transmission of a corresponding terminal in a base station/network. ) In addition to the UL bandwidth part (bandwidth part), it may be defined to set or activate an additional UL bandwidth part capable of SRS transmission (activation).

Alternatively, regardless of UL bandwidth part setup and activation for the corresponding PUSCH/PUCCH, the UL bandwidth part capable of SRS transmission for each terminal or cell-specific in the base station/network (cell-specific) ( The bandwidth part may be defined to be separately set through UE-specific higher layer signaling or cell-specific higher layer signaling.

Additionally, when an aperiodic SRS transmission through a PDCCH is triggered at an arbitrary UE, the PDCCH includes instruction information for a bandwidth part in which the aperiodic SRS transmission is performed. Can be defined.

In addition, in 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 UE. can do. That is, regardless of the PUSCH/PUCCH bandwidth part activation method defined in the NR and the bandwidth part activation method for SRS transmission, PUCCH/PUSCH or For SRS transmission, it may be defined to enable PRACH transmission in a corresponding terminal through all UL bandwidth parts activated.

Alternatively, regardless of the activation (activation) of the UL bandwidth part (bandwidth part) for PUCCH/PUSCH or SRS transmission, it may be defined to enable PRACH transmission through all bandwidth parts set for any terminal. Alternatively, higher layer signaling or cell UE-specific UL bandwidth part capable of PRACH transmission for each UE or cell-specific in a base station/network. -It can be defined to be set separately through cell-specific higher layer signaling. Additionally, when a PRACH transmission for an arbitrary UE is performed through a PDCCH, the corresponding PDCCH can be defined to include indication information about a bandwidth part in which a PRACH transmission is performed.

Example 2. Cross bandwidth part Scheduling and multi-bandwidth part Scheduling (Cross bandwidth part scheduling and multi-bandwidth parts scheduling)

In the case of a base station/network, when a plurality of DL bandwidth parts or UL bandwidth parts are set for each terminal, single bandwidth part scheduling or multi-bandwidth parts scheduling scheduling).

Single bandwidth part scheduling (Single bandwidth part scheduling) is a PDSCH or PUSCH resource in one bandwidth part (bandwidth part) through one scheduling DCI (eg, DL assignment DCI, UL grant, etc.) It can be defined as a scheduling method that restricts allocation. On the other hand, multi-bandwidth part scheduling (Multi-bandwidth parts scheduling) PDSCH over one or more bandwidth parts (bandwidth part) through one scheduling DCI (eg DL assignment DCI, UL grant, etc.) Alternatively, it may be defined as a scheduling method supporting PUSCH resource allocation.

In addition, when single bandwidth part scheduling is applied, semi-fixed between a DL bandwidth part with the same scheduling DCI transmission and a DL or UL bandwidth part with PDSCH or PUSCH transmission. (semi-static) link-based bandwidth part (bandage part) scheduling method is defined (linkage) is defined, and a different DL or DL through the scheduling DCI transmitted through any DL bandwidth part (bandwidth part) Cross bandwidth part scheduling, which dynamically supports PDSCH or PUSCH transmission resource allocation through the UL bandwidth part, may be defined, and may be defined to be set in a base station/network. .

The above-described configuration may be set through higher layer signaling, or may be made through MAC CE signaling or L1 signaling.

Example 2-1. Cross bandwidth part Scheduling (Cross bandwidth part scheduling)

If a plurality of DL bandwidth parts (activation) is activated for any terminal, in particular, when a plurality of DL bandwidth parts (activation) for a plurality of DL bandwidth parts for PDSCH transmission and reception is activated, PDSCH transmission for the corresponding terminal It is necessary to define a link between a DL bandwidth part in which this is made and a DL bandwidth part in which PDCCH transmission including scheduling control information for a corresponding PDSCH is made.

This embodiment proposes a cross bandwidth part scheduling scheme in which a PDSCH transmission for an arbitrary UE and a PDCCH transmission including scheduling control information for a corresponding PDSCH are made through different bandwidth parts. do.

To this end, when setting a DL bandwidth part for a user equipment in a base station/network, a bandwidth part indication field (BIF, Bandwidth part) for each DL bandwidth part through corresponding higher layer signaling Indication Field) value, or each DL bandwidth part through activation signaling (eg MAC CE signaling or L1 control signaling) when activating for any DL bandwidth part It can be defined to set the BIF (Bandwidth part Indication Field) value for each (bandwidth part).

Similarly, the UL bandwidth part (bandwidth part) for each UL bandwidth part (bandwidth part) in the base station / network or when setting the UL bandwidth part (bandwidth part) set for PUSCH or PUCCH transmission corresponding higher layer signaling (higher layer signaling) Set the BIF (Bandwidth part Indication Field) value for each UL bandwidth part through or activate the corresponding activation signaling (eg) when activating for any UL bandwidth part. It may be defined to set a bandwidth part indication field (BIF) value for each UL bandwidth part through MAC CE signaling or L1 control signaling).

Accordingly, when cross bandwidth part scheduling is supported, DL assignment DCI or UL grant for the corresponding terminal includes the above-described BIF indication information area. However, the corresponding cross bandwidth part scheduling may be defined to be configurable through higher layer signaling and MAC CE signaling for each terminal by a base station/network, in which case cross bandwidth part scheduling ( When a cross bandwidth part scheduling) is set, a DL assignment DCI or UL grant for the corresponding terminal includes the aforementioned BIF indication information area.

If cross bandwidth part scheduling is not applied, a PDCCH including an arbitrary DL assignment DCI and a corresponding PDSCH are transmitted through the same DL bandwidth part. . In addition, in the case of UL bandwidth part, through base layer/higher layer signaling for setting each UL bandwidth part in the base station/network, or activation of the UL bandwidth part (activation) ) PUSCH transmission resource allocation information in a corresponding UL bandwidth part through MAC CE signaling or L1 control signaling, that is, a DL bandwidth part in which transmission is performed on a PDCCH including a UL grant. It can be defined to transmit indication information.

Or, on the contrary, in a base station/network, through a higher layer signaling for setting each DL bandwidth part (or DL bandwidth part for PDCCH transmission), or a DL bandwidth part ) (Or DL bandwidth part for PDCCH transmission) for transmission of PUSCH or PUCCH or PRACH or SRS for each DL bandwidth part through MAC CE signaling or L1 control signaling for activation It may be defined to transmit UL bandwidth part indication information that has been linked.

Specifically, the link indication information of the UL bandwidth part for each DL bandwidth part is transmitted by the PU grant indicated by the UL grant transmitted through each DL bandwidth part. This may be UL bandwidth part indication information and UL bandwidth part indication information for transmission of UCI or PRACH or SRS triggered through the corresponding DL bandwidth part.

Example 2-2. Multi bandwidth part Scheduling (Multi-bandwidth parts scheduling)

Defined to support multi-bandwidth parts scheduling in which PDSCH or PUSCH transmission for an arbitrary UE is performed through a plurality of DL bandwidth parts or a plurality of bandwidth parts, respectively, in the same time interval. can do. The multi-bandwidth parts scheduling may be set by UE-specific UE-specific higher layer signaling or MAC CE signaling or L1 control signaling by the base station. have.

Or, multi-bandwidth parts scheduling (multi-bandwidth parts scheduling) is a plurality of DL bandwidth part (or a bandwidth part for transmitting a plurality of PDSCH) or a plurality of UL bandwidth parts for a random terminal, respectively When a (bandwidth part) (or UL bandwidth part for transmission of a plurality of PUSCHs) is set or activated, it may be defined to be set to be implicit.

Accordingly, when multi-bandwidth parts scheduling is set in any UE, DL assignment DCI or UL grant for the UE is set or activated for PDSCH or PUSCH transmission/reception ( It may be defined to include a bitmap-based indication information area for each DL part of the activated DL/UL bandwidth part. Bits constituting a bitmap for indicating the corresponding DL or UL bandwidth part are mapped to 1:1 in one DL bandwidth part or UL bandwidth part, respectively, and corresponding DL. It is defined to indicate whether PDSCH or PUSCH resources are allocated through a bandwidth part or a UL bandwidth part.

Accordingly, an arbitrary DL bandwidth part or UL bandwidth part indicates a bitmap information area included in a DL assignment DCI or UL grant for an arbitrary UE. When indicated through, the DL resource in which the frequency resource (PRB unit or RBG unit) allocation information area and time domain resource allocation information area of the corresponding DL assignment DCI or UL grant is indicated is indicated. It can be defined to be commonly applied in a part (bandwidth part) or UL bandwidth part (bandwidth part).

Alternatively, the corresponding multi-bandwidth parts scheduling may be applied in the form of bandwidth parts aggregation. That is, for a plurality of DL bandwidth parts (bandwidth part) or a plurality of UL bandwidth part (bandwidth part) set for any terminal, a plurality of DL bandwidth part (bandwidth part) or a plurality of UL bandwidth part (bandwidth part) Is activated (activation), and the corresponding (activation) of the DL bandwidth part (bandwidth part) or UL bandwidth part (bandwidth part) for a plurality of DL bandwidth part (bandwidth part) or a plurality of UL bandwidth part (bandwidth part) It can be defined that the bandwidth parts aggregation is set by the base station/network.

In this case, the downlink allocation for the corresponding terminal (DL assignment) DCI or the PRB assignment information area included in the UL grant (grant) includes all DL bandwidth parts (bandwidth part) or UL bandwidth for which the aggregation is set. It can be defined to be set by the base station and interpreted by the terminal based on the PRBs included in the part (bandwidth part).

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

In addition, when bandwidth parts aggregation for an arbitrary UE is applied, the above-mentioned for scheduling the PDSCH or PUSCH for the aggregated DL bandwidth part or UL bandwidth part The method of cross bandwidth part scheduling may be applied.

That is, the DL bandwidth part (linkage) link to which the PDSCH or PUSCH scheduling control information transmission for the corresponding aggregated DL bandwidth part or aggregated UL bandwidth part is made When information is set in a base station/network or when a bandwidth parts aggregation is set, one BIF value for a corresponding aggregated bandwidth part is allocated by the base station/network, and based on this As a result, the corresponding BIF value can be indicated through DCI.

4 is a diagram illustrating a procedure in which a terminal receives a downlink data channel or transmits an uplink data channel in this embodiment.

Referring to FIG. 4, the terminal may receive bandwidth part (BWP, bandwidth part) setting information from a base station (S400). This bandwidth part setting information is information on a bandwidth part set composed of one or more bandwidth parts set for the terminal.

In this case, as an example, the bandwidth part setting information may include index information indicating each bandwidth part of the bandwidth part set for a bandwidth part set consisting of one or more bandwidth parts set for the terminal.

As another example, the bandwidth part setting information may further include subcarrier spacing (SCS) information and a cyclic prefix (CP) for each bandwidth part of the aforementioned bandwidth part set.

At this time, each bandwidth part of the above-described bandwidth part may be configured by common resource block indexing information for component carriers configured by the base station. Here, the component carrier may be a narrowband (NB, narrowband) or a wideband (WB) component carrier, and may also refer to one or more component carriers constituting a carrier aggregation (CA).

All terminals using the same component carrier can share the same common resource block indexing information. That is, a single RB indexing may be applied regardless of whether any component carrier is based on a single numerology or multiplexed for multiple numerology.

Specifically, the configuration information for each bandwidth part of the aforementioned bandwidth part may include a starting resource block index (starting RB index) based on the common resource block indexing information described above, that is, a starting point of the bandwidth part. The starting physical resource block index may be indicated in RB index units based on common resource block indexing. In addition, the configuration information for each bandwidth part may further include starting resource block index information based on the common resource block indexing information and size information of the corresponding bandwidth part.

In addition, the terminal may receive bandwidth part configuration information from the base station through higher layer signaling (e.g. RRC signaling).

Further, the terminal may receive downlink control information (DCI) indicating one of the one or more bandwidth parts included in the above-described bandwidth part set from the base station based on the bandwidth part setting information received in step S400. (S410). The terminal may receive a downlink data channel from the base station or transmit an uplink data channel to the base station through one bandwidth part indicated by the downlink control information received from the base station. At this time, only one bandwidth part indicated through the bandwidth part setting information may be set at a specific time step, and the bandwidth part indicated for each preset time slice may be changed.

At this time, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the terminal may be set up to N (N is a natural number of 1 or more), respectively. For example, when N = 4, four different pieces of information can be represented by up to 2 bits. Accordingly, the number of bits of information indicating the bandwidth part in the downlink control information described above may be 1 bit or 2 bits.

In addition, the terminal may determine the number of bits of information indicating the bandwidth part in the downlink control information according to the number of bandwidth parts configured for the corresponding terminal by the bandwidth part setting information, which is the above-described higher layer signaling. That is, when the number of bandwidth parts configured for an arbitrary terminal is 2 or less according to the corresponding bandwidth part setting information received from the base station, the number of bits of the bandwidth part indication information of the downlink control information is 1 bit, and for any terminal When the number of configured bandwidth parts is more than two, the number of bits of the bandwidth part indication information of the corresponding downlink control information may be two bits.

Among the maximum N DL bandwidth parts described above, one initial DL bandwidth part for monitoring CORESET in a common search space of Type0-PDCCH may be set. In addition, one initial UL bandwidth part for random access may be set among the maximum N UL bandwidth parts described above.

That is, before the step S400, the first DL bandwidth part and the first UL bandwidth part are determined, and one of the bandwidth parts of the bandwidth part set consisting of one or more bandwidth parts set for the terminal is set as the first DL bandwidth part or the first UL bandwidth part. You can.

At this time, as a method in which the first DL bandwidth part and the first UL bandwidth part are determined, when the terminal detects an SS block transmitted from a base station, the frequency information of the detected SS block (SS Block) is based. The first DL bandwidth part and the first UL bandwidth part may be determined. In the initial access (initial access) step, the first DL bandwidth part and the UL bandwidth part are activated, and then, after the maximum N DL bandwidth parts and UL bandwidth parts for the terminal are set, a downlink data channel is received from the base station or transmitted to the base station. The bandwidth part for transmitting the uplink data channel may be changed.

Additionally, the UE may be set to receive the PDSCH only through one bandwidth part indicated by the downlink control information described above. In addition, PDCCH and RS (e.g. CSI-RS, TRS) may also be set to be received only through one bandwidth part indicated by the downlink control information.

5 is a diagram illustrating a procedure in which a base station transmits a downlink data channel or receives an uplink data channel in this embodiment.

Referring to FIG. 5, the base station may transmit bandwidth part (BWP, bandwidth part) setting information to the terminal (S500). This bandwidth part setting information is information on a bandwidth part set composed of one or more bandwidth parts set for the terminal.

In this case, as an example, the bandwidth part setting information may include index information indicating each bandwidth part of the bandwidth part set for a bandwidth part set consisting of one or more bandwidth parts set for the terminal.

As another example, the bandwidth part setting information may further include subcarrier spacing (SCS) information and a cyclic prefix (CP) for each bandwidth part of the aforementioned bandwidth part set.

At this time, each bandwidth part of the above-described bandwidth part may be configured by common resource block indexing information for component carriers configured by the base station. Here, the component carrier may be a narrowband (NB, narrowband) or a wideband (WB) component carrier, and may also refer to one or more component carriers constituting a carrier aggregation (CA).

All terminals using the same component carrier can share the same common resource block indexing information. That is, a single RB indexing can be applied regardless of whether any component carrier is based on a single numerology or multiplexed on multiple numerology.

Specifically, the configuration information for each bandwidth part of the aforementioned bandwidth part may include a starting resource block index (starting RB index) based on the common resource block indexing information described above, that is, a starting point of the bandwidth part. The starting physical resource block index may be indicated in RB index units based on common resource block indexing. In addition, configuration information for each bandwidth part may further include starting resource block index information based on the common resource block indexing information and size information of a corresponding bandwidth part. In addition, the base station may transmit bandwidth part configuration information to the terminal through higher layer signaling (e.g. RRC signaling).

Also, the base station may transmit downlink control information indicating one of the one or more bandwidth parts included in the above-described bandwidth part set to the terminal based on the above-described bandwidth part setting information (S510). The base station may transmit a downlink data channel to the terminal or receive an uplink data channel from the terminal through one bandwidth part indicated by the downlink control information. At this time, only one bandwidth part indicated through the bandwidth part setting information may be set at a specific time step, and the bandwidth part indicated for each preset time slice may be changed.

At this time, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the terminal may be set up to N (N is a natural number of 1 or more), respectively. For example, when N = 4, four different pieces of information can be represented by up to 2 bits. Accordingly, the number of bits of information indicating a bandwidth part in the downlink control information described above may be 1 bit or 2 bits.

In addition, the base station may determine the number of bits of the information indicating the bandwidth part in the downlink control information according to the number of bandwidth parts configured for an arbitrary terminal by the bandwidth part setting information, which is the above-described upper layer signaling. That is, when the number of bandwidth parts configured for any terminal is 2 or less, the number of bits of the bandwidth part indication information of the downlink control information is 1 bit, and the number of bandwidth parts configured for any terminal is greater than 2, The number of bits of the bandwidth part indication information of the downlink control information may be 2 bits.

In the above example, one initial DL bandwidth part for monitoring CORESET in a common search space of Type0-PDCCH among up to N DL bandwidth parts may be set. In addition, one initial UL bandwidth part for random access may be set among the maximum N UL bandwidth parts described above.

That is, before the step S500, the first DL bandwidth part and the first UL bandwidth part are determined, and one of the bandwidth parts of the bandwidth part set consisting of one or more bandwidth parts set for the terminal is set as the first DL bandwidth part or the first UL bandwidth part. You can.

At this time, as a method in which the first DL bandwidth part and the UL bandwidth part are determined, when the terminal detects an SS block transmitted from the base station, based on the detected frequency information of the SS block. The initial DL bandwidth part and the initial UL bandwidth part may be determined. In the initial access (initial access) step, the first DL bandwidth part and the UL bandwidth part are activated, and then, after the maximum N DL bandwidth parts and UL bandwidth parts for the terminal are set, a downlink data channel is received from the base station or transmitted to the base station. The bandwidth part for transmitting the uplink data channel may be changed.

Additionally, the base station may be set to transmit the PDSCH only through one bandwidth part indicated by the downlink control information described above. In addition, PDCCH and RS (e.g. CSI-RS, TRS) may also be configured to be transmitted only through one bandwidth part indicated by the downlink control information.

6 is a diagram showing the configuration of a base station according to the present embodiments.

Referring to FIG. 6, the base station 600 includes a controller 610, a transmitter 620, and a receiver 630.

The controller 610 may configure bandwidth part (BWP, bandwidth part) setting information for a bandwidth part set consisting of one or more bandwidth parts set for the terminal.

In this case, the aforementioned bandwidth part setting information may include index information indicating each bandwidth part of the bandwidth part set for a bandwidth part set consisting of one or more bandwidth parts set for the terminal. In addition, the base station may transmit bandwidth part configuration information to the terminal through higher layer signaling (e.g. RRC signaling).

The transmitting unit 620 and the receiving unit 630 are used to transmit and receive signals, messages, and data necessary to perform the present invention described above.

Specifically, the transmitter 620 transmits the above-described bandwidth part (BWP, bandwidth part) setting information to the terminal, and based on the above-described bandwidth part setting information, among the one or more bandwidth parts included in the above-described bandwidth part set Downlink control information including one indicating information may be transmitted to the terminal.

The base station may transmit a downlink data channel to the terminal or receive an uplink data channel from the terminal through one bandwidth part indicated by the downlink control information.

At this time, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the terminal may be set up to N (N is a natural number of 1 or more), respectively. For example, when N = 4, four different pieces of information can be represented by up to 2 bits only. Accordingly, the number of bits of information indicating a bandwidth part in the downlink control information described above may be 1 bit or 2 bits.

In addition, the base station may determine the number of bits of information indicating the bandwidth part in the downlink control information according to the number of bandwidth parts configured for an arbitrary terminal by the bandwidth part setting information, which is the above-described upper layer signaling. That is, when the number of bandwidth parts configured for any terminal is 2 or less, the number of bits of the bandwidth part indication information of the downlink control information is 1 bit, and the number of bandwidth parts configured for any terminal is greater than 2, The number of bits of the bandwidth part indication information of the downlink control information may be 2 bits. Among the maximum N DL bandwidth parts described above, one initial DL bandwidth part for monitoring CORESET in a common search space of Type0-PDCCH may be set. In addition, one initial UL bandwidth part for random access may be set among the maximum N UL bandwidth parts described above.

That is, the first DL bandwidth part and the first UL bandwidth part are determined, and one of the bandwidth parts of the bandwidth part set consisting of one or more bandwidth parts set for the terminal may be set as the first DL bandwidth part or the first UL bandwidth part.

At this time, as a method in which the first DL bandwidth part and the UL bandwidth part are determined, when the UE detects an SS block transmitted from the base station, based on the detected frequency information of the SS block. The initial DL bandwidth part and the initial UL bandwidth part may be determined. In the initial access (initial access) step, the first DL bandwidth part and the UL bandwidth part are activated, and then, after a maximum of N DL bandwidth parts and UL bandwidth parts for the terminal are set, a downlink data channel is received from the base station or transmitted to the base station. The bandwidth part for transmitting the uplink data channel may be changed.

Additionally, the base station may be set to transmit the PDSCH only through one bandwidth part indicated by the downlink control information described above. In addition, PDCCH and RS (e.g. CSI-RS, TRS) may also be configured to be transmitted only through one bandwidth part indicated by the downlink control information.

7 is a diagram showing the configuration of a terminal according to the present embodiments.

Referring to FIG. 7, the terminal 700 includes a receiver 710, a controller 720, and a transmitter 730.

The reception unit 710 receives bandwidth part (BWP, bandwidth part) setting information for a bandwidth part set composed of one or more bandwidth parts set for the terminal from the base station, and based on the received bandwidth part setting information, the aforementioned bandwidth Downlink control information including information indicating one of the one or more bandwidth parts included in the part set may be received from the base station.

The terminal may receive a downlink data channel from the base station or transmit an uplink data channel to the base station through one bandwidth part indicated by the downlink control information received from the base station.

At this time, the bandwidth part setting information may include index information indicating each bandwidth part for a bandwidth part set composed of one or more bandwidth parts set for the terminal. In addition, the terminal may receive bandwidth part configuration information from the base station through higher layer signaling (e.g. RRC signaling).

In addition, the number of DL bandwidth parts and the number of UL bandwidth parts that can be used by the terminal may be set up to N (N is a natural number of 1 or more), respectively. For example, when N = 4, four different pieces of information can be represented by up to 2 bits only. Accordingly, the number of bits of information indicating a bandwidth part in the downlink control information described above may be 1 bit or 2 bits.

In addition, the terminal may determine the number of bits of information indicating the bandwidth part in the downlink control information according to the number of bandwidth parts configured for the corresponding terminal by the bandwidth part setting information, which is the above-described upper layer signaling. That is, when the number of bandwidth parts configured for an arbitrary terminal is 2 or less according to the corresponding bandwidth part setting information received from the base station, the number of bits of the bandwidth part indication information of the downlink control information is 1 bit, and for any terminal When the number of configured bandwidth parts is more than 2, the number of bits of the bandwidth part indication information of the corresponding downlink control information may be 2 bits. Among the maximum N DL bandwidth parts described above, a common search space of Type0-PDCCH (common search) space), one initial DL bandwidth part for monitoring CORESET may be set. In addition, one initial UL bandwidth part for random access may be set among the maximum N UL bandwidth parts described above.

That is, the first DL bandwidth part and the first UL bandwidth part are determined, and one of the bandwidth parts of the bandwidth part set consisting of one or more bandwidth parts set for the terminal may be set as the first DL bandwidth part or the first UL bandwidth part.

At this time, as a method in which the first DL bandwidth part and the UL bandwidth part are determined, when the UE detects an SS block transmitted from the base station, based on the detected frequency information of the SS block. The initial DL bandwidth part and the initial UL bandwidth part may be determined. In the initial access (initial access) step, the first DL bandwidth part and the UL bandwidth part are activated, and then, after a maximum of N DL bandwidth parts and UL bandwidth parts for the terminal are set, a downlink data channel is received from the base station or transmitted to the base station. The bandwidth part for transmitting the uplink data channel may be changed.

Additionally, the UE may be set to receive the PDSCH only through one bandwidth part indicated by the downlink control information described above. In addition, PDCCH and RS (e.g. CSI-RS, TRS) may also be set to be received only through one bandwidth part indicated by the downlink control information.

The control unit 720 may control the overall operation for the terminal to transmit and receive data channels.

The standard contents or standard documents mentioned in the above-described embodiments are omitted to simplify the description of the specification and constitute a part of the specification. Therefore, it is to be construed that adding the contents of the above standard contents and a part of the standard documents to the specification or in the claims falls within the scope of the present invention.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain them, 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 interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present invention.

Claims (24)

In a method for a terminal to receive a downlink data channel or to transmit an uplink data channel,
Receiving bandwidth part (BWP, bandwidth part) setting information for a bandwidth part set consisting of one or more bandwidth parts set for the terminal from the base station; And
And receiving downlink control information including information indicating one of the one or more bandwidth parts included in the bandwidth part set set by the bandwidth part setting information from a base station,
Receiving a downlink data channel or transmitting an uplink data channel through one bandwidth part indicated by the downlink control information,
A method of determining the number of bits of information indicating one of the bandwidth parts included in the bandwidth part set according to the number of bandwidth parts configured by the bandwidth part setting information received from a base station through higher layer signaling.
According to claim 1,
The bandwidth part setting information,
And index information indicating each bandwidth part of the bandwidth part set.
According to claim 1,
The bandwidth part setting information,
Method for receiving from the base station through higher layer signaling.
According to claim 1,
In the downlink control information,
The method of claim 1, wherein the number of bits of information indicating one of the bandwidth parts included in the bandwidth part set is 1 bit or 2 bits.
delete According to claim 1,
A method for receiving a downlink data channel only through one bandwidth part indicated by the downlink control information.
A method for a base station to transmit a downlink data channel or to receive an uplink data channel,
Transmitting bandwidth part (BWP, bandwidth part) setting information for a set of bandwidth parts consisting of at least one bandwidth part set for the terminal to the terminal; And
And transmitting downlink control information including information indicating one of the one or more bandwidth parts included in the bandwidth part set set by the bandwidth part setting information to a terminal,
A downlink data channel is transmitted through one bandwidth part indicated by the downlink control information or an uplink data channel is received,
Method determined according to the number of bandwidth parts configured by the bandwidth part setting information transmitted to the terminal through higher layer signaling.
The method of claim 7,
The bandwidth part setting information,
And index information indicating each bandwidth part of the bandwidth part set.
The method of claim 7,
The bandwidth part setting information,
Method characterized in that it is transmitted to the terminal through higher layer signaling.
The method of claim 7,
In the downlink control information,
The method of claim 1, wherein the information indicating one of the bandwidth parts included in the bandwidth part set is 1 bit or 2 bits.
delete The method of claim 7,
A method for transmitting a downlink data channel only through one bandwidth part indicated by the downlink control information.
In the terminal for receiving a downlink data channel or transmitting an uplink data channel,
Bandwidth part (BWP) configuration information for a bandwidth part set consisting of one or more bandwidth parts set for the terminal is received from a base station, and one or more bandwidths included in the bandwidth part set set by the bandwidth part configuration information It includes a receiving unit for receiving downlink control information from the base station, including information indicating one of the parts,
Receiving a downlink data channel or transmitting an uplink data channel through one bandwidth part indicated by the downlink control information,
A terminal determined according to the number of bandwidth parts configured by the bandwidth part setting information received from a base station through higher layer signaling.
The method of claim 13,
The bandwidth part setting information,
A terminal comprising index information indicating each bandwidth part of the bandwidth part set.
The method of claim 13,
The bandwidth part setting information,
A terminal characterized in that it is received from a base station through higher layer signaling.
The method of claim 13,
In the downlink control information,
A terminal characterized in that the number of bits indicating one of the bandwidth parts included in the bandwidth part set is 1 bit or 2 bits.
delete The method of claim 13,
A terminal characterized in that it receives a downlink data channel only through one bandwidth part indicated by the downlink control information.
In the base station for transmitting a downlink data channel or receiving an uplink data channel,
A controller configured to configure bandwidth part (BWP, bandwidth part) setting information for a set of bandwidth parts consisting of one or more bandwidth parts set for a terminal; And
Downlink control including information indicating one of one or more bandwidth parts included in the bandwidth part set transmitted by the bandwidth part (BWP, bandwidth part) setting information to the terminal, and set by the bandwidth part setting information It includes a transmitter for transmitting information to the terminal,
Transmitting a downlink data channel or receiving an uplink data channel through one bandwidth part indicated by the downlink control information,
A base station determined according to the number of bandwidth parts configured by the bandwidth part setting information transmitted to the terminal through higher layer signaling.
The method of claim 19,
The bandwidth part setting information,
A base station comprising index information indicating each bandwidth part of the bandwidth part set.
The method of claim 19,
The bandwidth part setting information,
A base station characterized in that it is transmitted to the terminal through higher layer signaling.
The method of claim 19,
In the downlink control information,
A base station characterized in that the information indicating one of the bandwidth parts included in the bandwidth part set is 1 bit or 2 bits.
delete The method of claim 19,
A base station characterized in that the downlink data channel is transmitted only through one bandwidth part indicated by the downlink control information.

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