KR102206761B1 - Methods for transmitting and receiving a downlink preemption indication using bitmap for new radio networks and Apparatuses thereof - Google Patents

Abstract

The present embodiments relate to a method of transmitting and receiving downlink preemption indication information using a bitmap in a next-generation/5G radio access network.In one embodiment, in a method for a terminal to receive downlink preemption indication information, Receiving monitoring setting information for downlink preemption indication information from the base station, monitoring downlink preemption indication information based on the monitoring setting information, and receiving downlink preemption indication information from the base station, Downlink The preemption indication information provides a method characterized in that it includes a bitmap indicating information on a time interval resource or a frequency interval resource in which preemption occurs in a reference downlink resource.

Description

TECHNICAL FIELD [Methods for transmitting and receiving a downlink preemption indication using bitmap for new radio networks and Apparatuses thereof] in a next-generation wireless network

The present embodiments relate to a method of transmitting and receiving downlink preemption indication information using a bitmap in a next-generation/5G radio access network (hereinafter, also 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, in RAN WG1, frame structure, channel coding and modulation for NR (New Radio) respectively , Waveform and multiple access methods are being discussed. In contrast to LTE/LTE-Advanced, NR is required to be designed to satisfy various requirements for each subdivided and detailed usage scenario as well as an improved data rate.

As representative usage scenarios of NR, eMBB (enhancement mobile broadband), mMTC (massive machine type communication), and URLLC (Ultra Reliable and Low Latency Communications) are proposed, and LTE/LTE-Advanced contrasts to satisfy the needs of each usage scenario A flexible frame structure design is required.

In particular, services such as eMBB and mMTC in NR are more efficient as time-section resource allocation is longer in terms of cell throughput and coverage, whereas in URLLC, the shorter time-interval resource allocation is because of latency. Accordingly, there is a need to support efficient multiplexing of data traffic between services in a network in which eMBB, mMTC, and URLLC services are mixed.

It is an object of the present embodiments to provide a specific method for supporting efficient multiplexing of data traffic between services in a network in which eMBB, mMTC, and URLLC services are mixed in NR.

An embodiment devised to solve the above-described problem is a method for a terminal to receive downlink preemption indication information, the step of receiving monitoring configuration information for downlink preemption indication information from a base station, monitoring setting information Including the step of monitoring downlink preemption indication information and receiving downlink preemption indication information from the base station, wherein the downlink preemption indication information is a time period resource or a frequency section resource in which preemption occurs within the reference downlink resource. It provides a method comprising a bitmap indicating information on.

In addition, in an embodiment, in a method for a base station to transmit downlink preemption indication information, configuring monitoring setting information for downlink preemption indication information, transmitting monitoring setting information to a terminal, and downlink When preemption occurs, transmitting downlink preemption indication information to the terminal, wherein the downlink preemption indication information includes a bitmap indicating information on a time period resource or a frequency section resource in which preemption occurs in the reference downlink resource. It provides a method comprising a.

In addition, in an embodiment, in a terminal receiving downlink preemption indication information, a receiving unit for receiving monitoring configuration information for downlink preemption indication information from a base station, and receiving downlink preemption indication information from the base station, and Includes a control unit that monitors downlink preemption indication information based on the monitoring setting information, but the downlink preemption indication information includes a bitmap indicating information on a time period resource or a frequency section resource in which preemption occurs within the reference downlink resource. It provides a terminal characterized in that the.

In addition, in an embodiment, in a base station that transmits downlink preemption indication information, a control unit that configures monitoring setting information for downlink preemption indication information and monitoring setting information are transmitted to the terminal, and downlink preemption occurs. In this case, it includes a transmitter for transmitting downlink preemption indication information to the terminal, wherein the downlink preemption indication information includes a bitmap indicating information on a time period resource or a frequency section resource in which preemption occurs in the reference downlink resource. It provides a base station characterized by.

According to the present embodiments, in a network in which eMBB, mMTC, and URLLC services are mixed in NR, a specific method for supporting efficient multiplexing of data traffic between services can be provided.

1 is a diagram showing the alignment of OFDM symbols in the case of using different subcarrier spacing according to the present embodiments.
FIG. 2 is a diagram showing a resource when one preemption occurs between an eMBB and a URLLC in a downlink according to the present embodiments.
3 is a diagram illustrating a resource when a plurality of preemption occurs between an eMBB and a URLLC in a downlink according to the present embodiments.
4 is a diagram illustrating a procedure for a UE to receive downlink preemption indication information in this embodiment.
5 is a diagram illustrating a procedure for a base station to transmit downlink preemption indication information in this embodiment.
6 is a diagram showing the configuration of a base station according to the present embodiments.
7 is a diagram showing a configuration of a user terminal according to the present embodiments.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to elements of each drawing, it should be noted that the same elements are assigned the same numerals as possible even if they are indicated on different drawings. In addition, in describing the present invention, if it is determined that a detailed description of a related known configuration or function may obscure the subject matter of the present invention, a detailed description thereof will be omitted.

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

A user terminal is a generic concept that refers to a terminal in wireless communication, as well as UE (User Equipment) in WCDMA, LTE, HSPA, and IMT-2020 (5G or New Radio), as well as MS (Mobile Station) and UT in GSM. It should be interpreted as a concept that includes all of (User Terminal), SS (Subscriber Station), and wireless device.

A base station or cell generally refers to a station that communicates with a user terminal, and Node-B (Node-B), evolved Node-B (eNB), gNB (gNode-B), LPN (Low Power Node) ), Sector, Site, various types of antennas, BTS (Base Transceiver System), Access Point, Points (e.g., Transmit Point, Receiving Point, Transceiver Point), Relay Node ( Relay Node), mega cell, macro cell, micro cell, pico cell, femto cell, RRH (Remote Radio Head), RU (Radio Unit), small cell, etc.

In the various cells listed above, since there is a base station controlling each cell, the base station can be interpreted in two meanings. 1) In relation to the radio area, the device itself may provide a mega cell, a macro cell, a micro cell, a pico cell, a femto cell, and a small cell, or 2) the radio area itself may be indicated. In 1), all devices that are controlled by the same entity that provide a predetermined wireless area are controlled by the same entity, or all devices that interact to form a wireless area in collaboration are instructed to the base station. Points, transmission/reception points, transmission points, reception points, etc. are an embodiment of the base station according to the configuration method of the wireless area. In 2), it is possible to instruct the base station to the radio region itself that receives or transmits a signal from the viewpoint of the user terminal or the viewpoint of a neighboring base station.

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

In the present specification, the user terminal and the base station are two (Uplink or Downlink) transmission/reception subjects used to implement the technology or technical idea described in the present invention, and are used in a comprehensive sense, and are not limited by a specific term or word. Does not.

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

For uplink transmission and downlink transmission, a Time Division Duplex (TDD) scheme transmitted using different times may be used, and a frequency division duplex (FDD) scheme transmitted using different frequencies, a TDD scheme and an FDD scheme Mixed use methods can be used.

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

In the uplink and downlink, control information is transmitted through a control channel such as Physical Downlink Control CHannel (PDCCH), Physical Uplink Control CHannel (PUCCH), and the like, and physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), etc. It is configured with the same data channel to transmit data.

Downlink may refer to a communication or communication path from multiple transmission/reception points to a terminal, and uplink may refer to a communication or communication path from a terminal to multiple transmission/reception points. In this case, 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. 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 may be expressed in the form of “transmitting and receiving PUCCH, PUSCH, PDCCH, and PDSCH”.

Meanwhile, high layer signaling described below includes RRC signaling that transmits RRC information including RRC parameters.

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

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

An embodiment of the present invention is used in resource allocation in asynchronous wireless communication evolving to LTE/LTE-Advanced, IMT-2020 through GSM, WCDMA, HSPA, and synchronous wireless communication field 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 for supporting 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 an LTE-based MTC-related operation. Or, in this specification, the MTC terminal supports improved coverage compared to the existing LTE coverage, or the UE category/type defined in the existing 3GPP Release-12 or lower supporting low power consumption, or a newly defined Release-13 low cost (or low complexity) may mean UE category/type. Or, it may mean a further enhanced MTC terminal defined in Release-14.

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

As representative usage scenarios in New Radio (NR), which is currently being discussed in 3GPP, eMBB (enhanced mobile broadband), mMTC (massive machine type communication), and URLLC (Ultra Reliable and Low Latency Communication) have been proposed.

In this specification, frequencies, frames, subframes, resources, resource blocks, regions, bands, subbands, control channels, data channels, synchronization signals, various reference signals, various signals, and various messages related to NR (New Radio) Can be interpreted as a meaning used in the past or present, or in 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, waveform and Discussions on a multiple access scheme (frame structure, channel coding & modulation, waveform & multiple access scheme) have begun.

NR is required to be designed to satisfy various requirements for each detailed and detailed usage scenario, as well as an improved data rate compared to LTE/LTE-Advanced. In particular, eMBB (enhancement Mobile BroadBand), mMTC (massive MTC), and URLLC (Ultra Reliable and Low Latency Communications) were raised as representative usage scenarios of NR, and the requirements for each usage scenario As a method to meet the requirements of LTE/LTE-Advanced, a flexible frame structure design is required.

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

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

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

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

In particular, in the case of transmission and reception of latency critical data such as URLLC, a slot based on 0.5ms (7 symbols) or 1ms (14 symbols) defined in a newer roller frame structure with a small SCS value such as 15kHz When scheduling is performed in units, it may be difficult to meet the latency requirement. For this purpose, a mini-slot consisting of fewer OFDM symbols than the corresponding slot is defined and the corresponding URLLC It can be defined that scheduling for latency critical data such as

Alternatively, as described above, by multiplexing and supporting neuron rollers having different SCS values in one NR carrier by a TDM method or an FDM method, based on the slot (or mini-slot) length defined for each neuron roller Scheduling of data according to latency requirements is also being considered. For example, as shown in FIG. 1, when the SCS is 60 kHz, the symbol length is reduced by about 1/4 compared to the SCS 15 kHz, so when one slot is configured with the same 7 OFDM symbols, the 15 kHz-based slot length is While it becomes 0.5ms, the slot length based on 60kHz is reduced to about 0.125ms.

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

As described above, in NR, as a method for satisfying various usage scenarios, a method for supporting scheduling units having different lengths in a time-domain has been discussed. . In particular, in order to satisfy the URLLC requirement, it is necessary to subdivide the scheduling unit in the time-domain. However, from an eMBB point of view, an excessively subdivided time-domain scheduling unit entails excessive control overhead, and thus is not preferable from the viewpoint of cell throughput. In addition, from the viewpoint of mMTC, a slightly longer time interval resource allocation structure may be more suitable for coverage enhancement.

This embodiment supports efficient multiplexing between data traffic for each service in a network where long time-period resource allocation services such as eMBB and mMTC are mixed and services that require short time-period resource allocation such as URLLC are mixed. A method for configuring and transmitting and receiving downlink control information for this is proposed.

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 may 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 core network entities (AMF: Access and Mobility Function). For convenience of explanation, the base station may represent an eNB of LTE/E-UTRAN below, 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 An entity implemented as a single logical entity), may also represent a gNB.

In the NR usage scenario, URLLC refers to a service that supports high reliability and low latency. Although the size of transmitted and received data is not large, it is a service used when a serious problem occurs when a delay occurs in the data transmission and reception process. For example, a URLLC service may be used when a delay in data transmission/reception increases, such as in an autonomous vehicle, where human/material damage may occur due to a traffic accident.

eMBB uses a service that supports ultra-high-speed data transmission, and is a service used when a large amount of data needs to be transmitted and received. For example, when a large amount of data per unit time needs to be transmitted, such as a 3D video or UHD service, an eMBB service may be used.

The mMTC is a service used when the size of transmitted/received data is not large and delay occurs, but low power consumption is required. For example, in the case of sensor equipment installed to build a smart city, mMTC service can be used because the mounted battery must operate for as long as possible.

In general, one of the three services of URLLC/eMBB/mMTC described above is served to the terminal according to the characteristics of the terminal. Hereinafter, a terminal using the URLLC service may be referred to as a URLLC terminal, a terminal using the eMBB service may be referred to as an eMBB terminal, and a terminal using the mMTC service may be referred to as an mMTC terminal. In addition, eMBB, mMTC, and URLLC can be interpreted as eMBB terminal, mMTC terminal, and URLLC terminal, respectively.

And in this embodiment, preemption means that when traffic for URLLC occurs, some of the resources allocated to eMBB or mMTC are re-allocated to URLLC in order to meet the latency requirement for URLLC, which will be described later. As in the example to be described, the term puncturing or superposition (however, the present invention is not limited by the name) may also be expressed. When such preemption occurs, downlink data transmission to the eMBB terminal is discontinuously interrupted in the middle for downlink data transmission to the URLLC terminal. Therefore, the occurrence of preemption in this embodiment can be interpreted as the occurrence of discontinuous transmission from the viewpoint of the eMBB terminal, and occurrence of preemption is referred to as occurrence of discontinuous transmission. It is also possible to express.

At this time, since the resource originally allocated to eMBB or mMTC is used by URLLC, the eMBB terminal or the mMTC terminal originally allocated the resource must receive information on which resource is preempted. Downlink preemption means that the downlink resource of the terminal is preempted.

In addition, the downlink preemption indication information is information for indicating to the terminal which data channel is preempted in the downlink, and is information that informs the terminal of the downlink preemption, so it can be expressed as downlink preemption notification information. have. The downlink preemption indication information may be indicated in the form of a signal or a channel.

Hereinafter, more various embodiments of a method for transmitting and receiving downlink preemption indication information between a terminal and a base station will be described in detail.

The embodiments described below may be applied individually or in any combination.

As described above, in order to support URLLC service in NR, a short scheduling unit (or TTI, Transmission Time Interval) capable of satisfying a latency boundary in a time domain is supported. There is a need. On the other hand, in the case of eMBB or mMTC, in defining the scheduling unit in the time domain, it is the control overhead to apply a slightly longer time period resource allocation unit compared to the usage scenario of URLLC. It can be efficient in terms of (control overhead) and coverage.

Numerology of subcarrier spacing (eg 60kHz, 120kHz, etc., larger subcarrier spacing), which is easy to define short time period resource allocation units suitable for URLLC as a method to simultaneously satisfy various NR usage scenarios. (numerology) and a mixed numerology that supports the numerology of subcarrier spacing (eg 15kHz for eMBB or 3.75kHZ for mMTC) suitable for eMBB and mMTC through one NR carrier Time domain scheduling units having different lengths, such as subframes, slots, or mini-slots, within an NR carrier that supports a structure or operates in any one numerology. -domain scheduling unit) needs to be supported at the same time.

As an example of a method for this, the time/frequency resource (or region) in which resource allocation is performed based on the optimal scheduling unit for each usage scenario is semi-fixed ( It is semi-statically allocated, and resource allocation can be defined using a time/frequency resource of a corresponding region according to a usage scenario for each terminal.

However, in an environment in which traffic is generated randomly for each usage scenario, semi-static resource allocation is inefficient in terms of radio resource utilization.

As a method to solve this problem, in allocating downlink data transmission resources, some radio resources among the downlink radio resources allocated for data transmission of any eMBB or mMTC are punctured and used for urgent URLLC data transmission and reception. There is a need for support for eMBB/URLLC multiplexing based on dynamic puncturing (or based on superposition in which URLLC data transmission signals are additionally transmitted by superposition for some radio resources). .

That is, an eMBB that is used for urgent URLLC data transmission by puncturing (or superpositioning) some of the eMBB (or mMTC) downlink resources that have already been allocated and transmitted (on-going). We are considering a way to support dynamic resource sharing between /URLLCs.

In addition, when a dynamic resource sharing technique based on dynamic puncturing (or superposition) between eMBB/URLLC is applied to the downlink of NR, puncturing for URLLC data transmission A method of indicating the radio resource to the corresponding eMBB terminal through explicit signaling is considered.

In this case, as an indication method based on the explicit signaling, corresponding puncturing within the TTI (or slot, mini-slot, or merged slot) in which downlink data transmission is performed in the eMBB terminal A method of indicating (puncturing) information and a method of indicating whether or not puncturing is performed through a subsequent TTI after the corresponding TTI are considered.

In this embodiment, when dynamic resource sharing between eMBB/URLLC is applied as described above, a method of configuring information for controlling a puncturing indication for an eMBB terminal and a method of transmitting/receiving is proposed.

However, in this embodiment, the description is based on a usage scenario such as eMBB or URLLC, but from the viewpoint of radio resource allocation and downlink data transmission and reception accordingly, eMBB is a long time period in units of slots or merged slots. The inter resource allocation unit may correspond to a defined terminal or data session, and in the case of URLLC, short time period resource allocation such as a mini-slot or symbol or a large SCS (ex. 60 kHz, 120 kHz) based slot unit, etc. The unit may correspond to a defined terminal or data session.

Specifically, puncturing (or superposition) in a mini-slot or symbol unit within a downlink data transmission resource allocated in an arbitrary slot unit or a plurality of slot units, or a corresponding mini-slot or symbol All PDSCHs in which puncturing (puncturing) for partial radio resources is performed for on-going downlink transmission in which puncturing (or superposition) is performed only for some frequency resources (some PRBs) even within This embodiment can be applied to transmission and reception.

Accordingly, in this embodiment, as shown in FIG. 2 below, the first terminal (eg eMBB terminal) or data is based on a scheduling unit in a slot unit or a long time period unit in which puncturing can be performed among a given downlink data transmission resource. Corresponds to downlink data transmission of. In addition, the second terminal (e.g. URLLC terminal) or data corresponds to downlink data transmission used by puncturing some of the downlink resources allocated for the corresponding eMBB terminal or data transmission.

In this embodiment, when a part of the PDSCH transmission resource of the first terminal is punctured for the PDSCH transmission of the second terminal, as shown in FIG. 2, for indicating the corresponding puncturing to the first terminal. A method of configuring control information and a radio resource allocation method for transmitting and receiving the same is proposed.

However, this embodiment is not limited by the name. That is, as a multiplexing method between data transmissions having different latency requirements, or between data transmissions for which different TTI (Transmission Time Interval)-based scheduling is performed accordingly, some of the already allocated PDSCH transmission resources (eg 1 Based on preemption used for puncturing a part of the first PDSCH transmission resource for the terminal) and transmitting another PDSCH (eg, transmitting the second PDSCH for the second terminal) that is delay critical When the PDSCH multiplexing method of is applied, the downlink control information of the base station for instructing the first terminal to punctured transmission resource information for the second PDSCH transmission among the corresponding first PDSCH transmission resources. Although described as puncturing indication downlink control information (DCI), this may be referred to as other names such as preemption indication DCI, whereby the scope of this embodiment is not limited.

Puncturing Definition of downlink control information format for indication/preemption indication (Definition of DCI format for puncturing indication/pre- emption indication)

For puncturing indication/preemption indication, a DCI format used to transmit scheduling control information for resource allocation used for transmission and reception of PDSCH/PUSCH (eg DL assignment DCI format and Apart from the uplink grant (UL grant) DCI format), a puncturing indication/preemption indication (puncturing indication/preemption indication) DCI format (however, the present invention is not limited by the name) can be defined.

When the puncturing indication/preemption indication DCI format is described by taking the case of FIG. 2 as an example, the first PDSCH transmission resources allocated to the first UE are used for the second PDSCH transmission for the second UE. It is a DCI format for instructing the first terminal to be informed of the contents of the puncturing (or superposition) radio resource. A specific embodiment proposed by the present invention for configuring the DCI format is as the following embodiment.

First Example

First, puncturing indication/preemption indication information may be defined to be signaled in a UE-specific manner. And when dynamic resource sharing between any of the first and second terminals is applied, at most one mini-slot level (or continuous) for one PDSCH transmission transmitted in a slot unit or a plurality of slot units. Symbol level) can be defined to allow only puncturing.

That is, as shown in FIG. 2, it may be defined that only puncturing by transmitting at most one second PDSCH is allowed in the first PDSCH region. In this case, the DCI format for the corresponding puncturing indication/preemption indication is a mini-slot index for indicating a puncturing time period resource or a symbol index ( symbol index) or the index of the starting symbol and the number of symbols constituting the time period resource (starting symbol index + symbol duration).

At this time, the length of the mini-slot as a unit of puncturing (that is, the number of symbols constituting the mini-slot) and the mini-slot boundary and number constituting one DL (centric) slot I) is configured through UE-specific/cell-specific higher layer signaling for each UE, or ii) puncturing indication/puncturing indication/ It may be dynamically configured through a preemption indication) signal, or may be determined implicitly by iii) a transmission subcarrier spacing (SCS) value set in the corresponding terminal/cell/slot.

The puncturing indication/preemption indication information may include indication information for a punctured physical resource block (punctured PRB(s)) in a punctured mini-slot. At this time, the information indicating the punctured physical resource block (punctured PRB(s)) is i) an assigned PRB or a PRB group consisting of a plurality of localized or distributed PRB(s) Signaled in a manner indicated through a bitmap of a unit, or ii) included in the corresponding second PDSCH scheduling control information (ie, a DL assignment DCI format for a second PDSCH for a second terminal) PRB allocation information can be defined to be reused.

Puncturing indication / preemption indication (puncturing indication / preemption indication) information is transmission / preemption / puncturing type (transmission / pre-emption / puncturing type) (however, the present invention is the name for the transmission / pre-emption / puncturing type Not limited by). Transmission/pre-emption/puncturing type (transmission/pre-emption/puncturing type) is whether the transmission of the second PDSCH in the corresponding radio resource is based on puncturing for the first PDSCH or is superpositioned and transmitted. It can be defined as an information area indicating whether or not.

In addition, the corresponding puncturing indication/preemption indication information is whether retransmission for the first PDSCH or the entire first PDSCH corresponding to the punctured or overlapped radio resource region and HARQ of the first terminal It may include PUCCH reconfiguration information for ACK/NACK feedback.

Second Example

It can be defined so that puncturing indication/preemption indication information is signaled in a UE-specific manner. And defined to allow PDSCH transmission for a plurality of terminals or puncturing for transmission of a plurality of PDSCHs within the first PDSCH transmission for any first terminal for which PDSCH resource allocation in a slot unit or a plurality of slot units has been allocated. can do. That is, as shown in FIG. 3, puncturing for transmission of a plurality of PDSCHs such as a second PDSCH, a third PDSCH, a fourth PDSCH, ... in the first PDSCH region is performed by the base station/network/cell. Can be defined to allow.

In this case, the puncturing indication/preemption indication information is a separate puncturing indication/preemption indication for each of the 2nd PDSCH, 3rd PDSCH, 4th PDSCH,... ) It can be defined to be individually signaled through DCI.

Specifically, one puncturing indication/preemption indication DCI format is defined as a form for indicating puncturing or preemption information by single PDSCH transmission as in the first embodiment. And, if puncturing by a plurality of PDSCHs is performed, a separate puncturing indication/preemption indication (DCI) of each corresponding number is configured and defined to be transmitted to the corresponding first terminal. I can.

If a plurality of puncturing (puncturing) is supported, as another method for the corresponding puncturing indication / preemption indication (puncturing indication / preemption indication), one puncturing indication / preemption indication (puncturing indication / preemption indication) DCI format Through it can be defined to simultaneously indicate puncturing by a plurality of PDSCHs. In this case, the corresponding puncturing indication/preemption indication DCI format indicates the number of mini-slots punctured within the corresponding PDSCH TTI or the number of PDSCHs transmitted through puncturing. It can be made to include an information area that indicates.

That is, since puncturing has been performed for three mini-slots or three PDSCH transmissions within the first PDSCH transmission TTI in FIG. 3, the information region for indicating this is indicated by the corresponding puncturing indication/puncturing indication /preemption indication) Can be defined in DCI format.

Alternatively, after configuring a bitmap in a mini-slot unit (or symbol unit or symbol group unit) constituting the corresponding PDSCH transmission TTI, it is possible to determine whether or not puncturing occurs in each mini-slot (or symbol or symbol group). It can be defined to indicate in a map way

Or the puncturing indication / preemption indication (puncturing indication / preemption indication) the aggregation level of the DCI format (aggregation level), that is, the puncturing indication / preemption indication (puncturing indication / preemption indication) of the radio resources used for DCI format transmission A function consisting of factors such as the amount, the number of control channel elements (CCE), or puncturing indication/preemption indication according to the DCI transmission search space (SS, Search Space) It can be defined to implicitly indicate the number of punctured mini-slots or the number of puncturing and transmitted PDSCHs.

Other PRB allocation information in the corresponding mini-slot, transmission/pre-emption/puncturing type, retransmission status, and PUCCH reconfiguration information for HARQ ACK/NACK feedback of the first terminal And the like may be transmitted in the same form as in the first embodiment described above.

However, in the above-described first and second embodiments, the RNTI value of the UE for monitoring the corresponding puncturing indication/preemption indication DCI is for monitoring the scheduling DCI format of the corresponding UE. A separate UE-specific RNTI for monitoring DCI equal to the assigned UE-specific RNTI value or indicating puncturing is high layer signaling Can be assigned through

Third Example

Puncturing indication / preemption indication (puncturing indication / preemption indication) information may be specifically transmitted to a cell-specific (cell-specific) or TTI / slot / multiple-slot (TTI / slot / multiple-slot).

Specifically, the PDSCH transmission resource allocation information of the URLLC that affected the PDSCH of the eMBB in a cell/slot/multiple-slot unit is UE-group common (or, group- It can be defined to be transmitted through control signaling of (can also be expressed as group-common). That is, the corresponding puncturing indication/preemption indication DCI format is specifically transmitted to the slot-specific or UE-group, and affects the PDSCH of the eMBB in the corresponding slot. It may include information indicating the PDSCH transmission resource of the URLLC (that is, transmitted by puncturing the eMBB PDSCH resource).

To this end, a separate UE-group specific RNTI or cell-specific/slot-specific (slot-) for monitoring corresponding puncturing indication/preemption indication information specific) RNTI can be defined. The above-described RNTI performs higher layer signaling specific to UE-specific/cell-specific/UE-group for each UE-group. It may be allocated through or defined implicitly as a function of a slot index, cell ID, or the like.

A method of configuring a specific information region of a puncturing indication DCI format specific to a corresponding cell-specific or TTI/slot/multiple-slot is described above. The form of the first embodiment or the second embodiment can be followed.

That is, the DCI of the UE-group common for puncturing indication/preemption indication is configured, and the corresponding DCI is the UE-group common by the base station/network. ) Considering the case of transmission through the PDCCH, the indication information on the radio resource with puncturing/preemption transmitted through the corresponding puncturing indication/preemption indication) DCI is each It may be composed of time interval resource indication information or frequency interval resource indication information. In addition, the corresponding time section resource indication information and the frequency resource section indication information may follow the contents described through the above-described first or second embodiment.

As a specific example of this, a preemption window and a preemption interval (referred to by the name, however, to configure information indicating a time period resource in which puncturing or preemption) has been made The invention is not limited).

Preemption window (Preemption window) is the above-described puncturing indication / preemption indication (puncturing indication / preemption indication) DCI transmission period or puncturing indication / preemption indication (puncturing indication / preemption indication) control resource set for DCI transmission (CORESET, Control Resource set) can be determined by the cycle.

For example, puncturing instruction/puncturing for indicating whether or not puncturing/preemption is performed using the TTI of a first terminal having a long time period scheduling unit as shown in FIG. 2 or 3 as a cycle. Indication/preemption indication) Consider the case where DCI is transmitted and a control resource set (CORESET) for this is defined. In this case, the TTI of the corresponding first terminal may be defined as a preemption window.

Or, when a signal indicating preemption is transmitted in units of a plurality of first PDSCH TTIs, the plurality of first PDSCH TTIs are united according to the transmission/reception period of the corresponding puncturing indication/preemption indication. A preemption window may be defined.

The preemption interval is to allocate resources of a second PDSCH, a third PDSCH, or a fourth PDSCH that performs preemption-based PDSCH transmission and reception by puncturing some of the aforementioned first PDSCH transmission resources. It can be determined by the time period scheduling unit used for this.

That is, the preemption interval may be determined in units of TTI for transmitting and receiving a PDSCH of the second terminal, the third terminal, or the fourth terminal described above. Accordingly, when the base station/network configures monitoring setting information for DCI for a puncturing indication/preemption indication for an arbitrary terminal (eg, a first terminal), a preemption window Information about the information may be directly set and transmitted to the terminal through higher layer signaling.

Or, the base station/network is a higher layer signaling information for setting a period of a control resource set (CORESET) for monitoring a puncturing indication/preemption indication for a certain terminal (eg, a first terminal) DCI. It can be defined to transmit to a terminal through (higher layer signaling) and to infer information on a preemption window based on the transmission to the terminal.

In addition, the setting information on the corresponding preemption interval is set through i) higher layer signaling from the base station/network, or ii) puncturing indication/preemption as described through the above-described embodiment 1 Indication (puncturing indication/preemption indication) is indicated dynamically through DCI, or iii) puncturing indication/preemption indication (puncturing indication/preemption indication) DCI or preemption-based PDSCH (eg 2nd It may be set implicitly by a subcarrier spacing (SCS) value used for transmission of the PDSCH, the third PDSCH, and the fourth PDSCH.

In this case, in the case where the preemption interval, which is the time period unit of the preemption within the preemption window, is defined, the corresponding puncturing indication/preemption indication DCI is Example 1 Alternatively, as described in Example 2, i) the index for the preemption interval in which the preemption occurs within the preemption window is directly indicated, or ii) preemption based on a bitmap ( It can be defined to indicate a preemption interval in which preemption has occurred.

When the index for the preemption interval is directly indicated, one UE-group common puncturing indication/preemption indication DCI is one preemption interval ) Can be defined to include only information indicating preemption. If preemption occurs in a plurality of preemption intervals in the preemption window, separate UE-group common puncturing instructions for each preemption interval/ Preemption indication (puncturing indication/preemption indication) DCI may be configured and transmitted.

In addition, when the puncturing indication/preemption indication DCI is composed of bitmap-based preemption interval indication information, one puncturing indication/preemption indication (puncturing indication/preemption indication) ) Through DCI, it is possible to indicate a plurality of preemption intervals in which preemption has occurred within a preemption window.

For the above-described case, an information region for indicating a frequency section resource in which preemption occurs for each preemption interval is defined separately and is included in the puncturing indication/preemption indication DCI. I can.

As a method of configuring information indicating frequency interval resources for radio resources for which preemption is made through UE-group common puncturing indication/preemption indication DCI, As described through the first embodiment, the information indicating a corresponding frequency section resource may be bitmap indication information based on a resource block (RB) or a resource block group (RBG).

At this time, the bandwidth part that is the target of the RBG or RB indication information for which puncturing or preemption is made through puncturing indication/preemption indication (DCI), that is, preemption A UE-group common bandwidth part for (preemption) is set by a base station/network to monitor preemption indication information through higher layer signaling Can be defined to be sent to. And the RB or RBG indication information transmitted through the corresponding puncturing indication/preemption indication DCI is indication information for RBs or RBGs constituting a bandwidth part for preemption. It can be defined to be set by the base station and interpreted by the terminal.

Or, a plurality of bandwidth parts for preemption are set by the base station, and preemption is performed through the frequency section resource indication information of the corresponding puncturing indication/preemption indication. It can be configured to transmit indication information on the generated bandwidth part and RB or RBG indication information within a corresponding bandwidth part.

In this case, the subcarrier spacing (SCS) value for defining the RB grid constituting the bandwidth part for preemption is i) higher layer signaling set by the base station/network. Transmitted through, ii) puncturing indication/preemption indication, or indicated as dynamic through DCI, or iii) corresponding puncturing indication/preemption indication) DCI or preemption ( Preemption) defined to be set to be explicit or implicit by the subcarrier spacing (SCS) value for transmission of the PDSCH (eg 2nd PDSCH, 3rd PDSCH, 4th PDSCH) for which resource allocation has been made. I can.

Or instead of configuring a separate bandwidth part for preemption, puncturing indication/preemption indication DCI constitutes the entire band of the corresponding NR component carrier (CC, Component Carrier) Information indicating the RB or RBG in which preemption has occurred is configured and transmitted for the frequency resource, and the UE is defined based on the NR component carrier (CC) full-band UE-common RB grid ( grid) can be defined to interpret the corresponding RB or RBG indication information.

Even in this case, the subcarrier spacing (SCS) value that defines the UE-common RB grid is also i) set in the base station/network and transmitted through higher layer signaling or ii ) Puncturing indication / preemption indication (puncturing indication / preemption indication) or iii) puncturing indication / preemption indication (puncturing indication / preemption indication) DCI or preemption based resource allocation is made through DCI It may be defined to be set to be explicit or implicit by a subcarrier spacing (SCS) value for transmission of the PDSCH (eg, the second PDSCH, the third PDSCH, and the fourth PDSCH).

In addition, when information indicating a frequency section resource is configured in RBG units, the size of the RBG is i) set through higher layer signaling from the base station/network, or ii) puncturing indication/puncturing indication /preemption indication) Dynamically indicated through DCI or iii) puncturing indication/preemption indication DCI or preemption-based resource allocation based PDSCH (eg 2nd PDSCH, 3rd PDSCH , The subcarrier spacing (SCS) value for transmission of the fourth PDSCH) and the bandwidth of the bandwidth part for preemption or the bandwidth of the NR component carrier (CC) may be implicitly defined. have.

4 is a diagram illustrating a procedure for a UE to receive downlink preemption indication information in this embodiment.

Referring to FIG. 4, the UE may receive monitoring configuration information for downlink preemption indication information from the base station (S400). In this case, the monitoring configuration information may include information on whether to monitor the downlink preemption indication.

That is, information on whether to monitor or not to monitor downlink preemption indication information used to indicate whether the downlink preemption has occurred may be included in the monitoring configuration information. For example, in the case of an eMBB terminal, there is a possibility that the resource originally allocated to itself is preoccupied by the URLLC terminal, so it is necessary to monitor downlink preemption indication information. However, in the case of a URLLC terminal, it may not be necessary to monitor downlink preemption indication information because there is no possibility that the resource allocated to it is preempted by another terminal.

In addition, the terminal may monitor the downlink preemption indication information based on the monitoring configuration information received in step S400 (S410).

If the UE monitors the downlink preemption indication information, the UE may receive downlink preemption indication information from the base station (S420).

In this case, the downlink preemption indication information may be indicated through a group-common DCI. The group-common DCI may be transmitted to the terminal through a downlink control channel (PDCCH). That is, the terminal may receive the above-described puncturing indication/preemption indication DCI in the third embodiment.

The downlink preemption indication information may include a bitmap indicating information on a time section resource or a frequency section resource in which preemption occurs in the reference downlink resource.

Here, the reference downlink resource means a resource to be preempted. That is, preemption may occur for a partial region of the reference downlink resource, and the terminal may determine which part of the reference downlink resource the preemption occurs using the aforementioned bitmap.

In this case, the time period of the reference downlink resource may be set as a preemption window described in the third embodiment, and the frequency period may be set as a bandwidth part described in the third embodiment.

As an example, the aforementioned bitmap may consist of 14 bits, and each bit of the bitmap may indicate one of M different time period resources and one of N different frequency period resources. At this time, M and N are each a natural number of 1 or more.

In this case, (M*N) different resources may be determined by different M time interval resources and N different frequency interval resources. In order to distinguish each resource, each resource is assigned to a bit of a different bitmap. It should be mapped. Accordingly, two cases of M=14, N=1 or M=7, N=2 can be set among pairs of natural numbers M*N satisfying (M*N) = 14.

In addition, the UE may receive information for setting a unit of a time period resource in which preemption occurs and a unit of a frequency resource, which is information indicated by the downlink preemption indication information, from the base station through higher layer signaling. The unit of the time interval resource may be expressed as a preemption interval described above in the third embodiment, and the unit of the frequency interval resource may be expressed as one or more RBs or RBGs described above in the third embodiment.

As an example, the terminal receives information on which of M=14, N=1 or M=7, N=2 above-described M and N through higher layer signaling such as RRC from the base station, and downlink reference A value obtained by dividing the total time period resource of the link resource by M may be set as a unit of the time period resource, and a value obtained by dividing the total time period resource of the reference downlink resource by N may be set as a unit of frequency resource. At this time, the value that M and N can have is one of two, so it can be expressed using a 1-bit indicator.

As another example, the UE transmits information explicitly indicating how many symbols the time interval resource unit is composed of or how many RBs (or RBGs) the frequency interval resource unit is composed of higher layer signaling such as RRC from the base station. It can also be received through.

At this time, the unit of the time period resource indicated by each bit of the bitmap and the unit of the frequency resource may be constant for all bits of the bitmap, or the index of the time period resource indicated by each bit (eg slot index) And it may be implicitly determined by a function of the index of the frequency resource (eg RB index).

개의 비트가 지시하는 시구간 자원의 단위는

개의 심볼이고, 나머지

개의 비트가 지시하는 시구간 자원의 단위는

개의 심볼일 수 있다.As an example, when M=14 and N=1, when the total time period resources of the reference downlink resource are composed of T symbols, the first among 14 bits constituting the bitmap

The unit of the time period resource indicated by the two bits is

Symbols, and the rest

The unit of the time period resource indicated by the two bits is

It may be a number of symbols.

개의 쌍의 비트가 지시하는 시구간 자원의 단위는

개의 심볼이고, 나머지

개의 쌍의 비트가 지시하는 시구간 자원의 단위는

개의 심볼일 수 있다. 그리고 전술한 각 쌍에서 첫 번째 비트가 지시하는 주파수 구간 자원의 단위는

개의 PRB이고, 두 번째 비트가 지시하는 주파수 구간 자원의 단위는

개의 PRB일 수 있다.As another example, when M=7 and N=2, the entire time period resource of the reference downlink resource is composed of T symbols, and the total frequency section resource of the reference downlink resource is composed of B PRBs, and the bitmap is composed of 14 bits can be configured as a pair of 7 bits. At this time, the first of the 7 pairs constituting the bitmap

The unit of the time interval resource indicated by the pair of bits is

Symbols, and the rest

The unit of the time interval resource indicated by the pair of bits is

It may be a number of symbols. And the unit of the frequency interval resource indicated by the first bit in each pair described above is

PRBs, and the unit of the frequency section resource indicated by the second bit is

It may be a number of PRBs.

5 is a diagram illustrating a procedure for a base station to transmit downlink preemption indication information in this embodiment.

Referring to FIG. 5, the base station may configure monitoring setting information for downlink preemption indication information (S500). In this case, as described with reference to FIG. 4, in this case, the monitoring configuration information may include information on whether to monitor the downlink preemption indication.

In addition, the base station may transmit the above-described monitoring configuration information to the terminal (S510).

In addition, when downlink preemption occurs, the base station may transmit downlink preemption indication information to the terminal (S520).

In this case, the downlink preemption indication information may be indicated through a group-common DCI. The group-common DCI may be transmitted to the terminal through a downlink control channel (PDCCH). That is, the base station may transmit the aforementioned puncturing indication/preemption indication DCI to the terminal in the third embodiment.

In this case, the downlink preemption indication information may include a bitmap indicating information on a time section resource or a frequency section resource in which preemption occurs in the reference downlink resource.

Here, the reference downlink resource means a resource to be preempted. That is, preemption may occur for a partial region of the reference downlink resource, and the base station may transmit to the terminal which part of the reference downlink resource the preemption occurs to the terminal using the aforementioned bitmap.

In this case, the time period of the reference downlink resource may be set as a preemption window described in the third embodiment, and the frequency period may be set as a bandwidth part described in the third embodiment.

As an example, the aforementioned bitmap may consist of 14 bits, and each bit of the bitmap may indicate one of M different time period resources and one of N different frequency period resources. At this time, M and N are each a natural number of 1 or more.

In this case, (M*N) different resources may be determined by different M time interval resources and N different frequency interval resources. In order to distinguish each resource, each resource is assigned to a bit of a different bitmap. It should be mapped. Accordingly, two cases of M=14, N=1 or M=7, N=2 can be set among pairs of natural numbers M*N satisfying (M*N) = 14.

In addition, the base station may transmit information for setting a unit of a time period resource in which preemption occurs and a unit of a frequency resource, which is information indicated by the downlink preemption indication information, to the UE through higher layer signaling. The unit of the time interval resource may be expressed as a preemption interval described above in the third embodiment, and the unit of the frequency interval resource may be expressed as one or more RBs or RBGs described above in the third embodiment.

As an example, the base station transmits information on which of M=14, N=1 or M=7, N=2 above-mentioned M and N to the terminal through higher layer signaling such as RRC, and receives it One terminal may set a value obtained by dividing the total time period resource of the reference downlink resource by M as a unit of the time period resource, and may set a value obtained by dividing the total time period resource of the reference downlink resource by N as a frequency resource unit. .

As another example, the base station provides information explicitly indicating how many symbols a time interval resource unit is composed of or how many RBs (or RBGs) a frequency interval resource unit is composed of higher layer signaling such as RRC. It can also be transmitted to the terminal.

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

Referring to FIG. 6, the base station 600 includes a control unit 610, a transmission unit 620, and a reception unit 630.

The control unit 610 may configure monitoring setting information for downlink preemption indication information. In this case, as described above, the monitoring configuration information may include information on whether to monitor downlink preemption indication information.

The transmitting unit 620 and the receiving unit 630 are used to transmit and receive signals, messages, and data necessary for carrying out the above-described present invention with the terminal.

The transmitter 620 may transmit monitoring configuration information to the terminal, and transmit downlink preemption indication information to the terminal when downlink preemption occurs.

In this case, the downlink preemption indication information may be indicated through a group-common DCI. The group-common DCI may be transmitted to the terminal through a downlink control channel (PDCCH). That is, the base station may transmit the aforementioned puncturing indication/preemption indication DCI to the terminal in the third embodiment.

In this case, as described with reference to FIG. 5, the downlink preemption indication information may include a bitmap indicating information on a time period resource or a frequency section resource in which preemption occurs in the reference downlink resource.

As an example, the aforementioned bitmap may consist of 14 bits, and each bit of the bitmap may indicate one of M different time period resources and one of N different frequency period resources. At this time, M and N are each a natural number of 1 or more.

In this case, (M*N) different resources may be determined by different M time interval resources and N different frequency interval resources. In order to distinguish each resource, each resource is assigned to a bit of a different bitmap. It should be mapped. Accordingly, two cases of M=14, N=1 or M=7, N=2 can be set among pairs of natural numbers M*N satisfying (M*N) = 14.

In addition, the base station may transmit information for setting a unit of a time period resource in which preemption occurs and a unit of a frequency resource, which is information indicated by the downlink preemption indication information, to the UE through higher layer signaling. The unit of the time interval resource may be expressed as a preemption interval described above in the third embodiment, and the unit of the frequency interval resource may be expressed as one or more RBs or RBGs described above in the third embodiment.

As an example, the base station transmits information on which of M=14, N=1 or M=7, N=2 above-mentioned M and N to the terminal through higher layer signaling such as RRC, and receives it One terminal may set a value obtained by dividing the total time period resource of the reference downlink resource by M as a unit of the time period resource, and may set a value obtained by dividing the total time period resource of the reference downlink resource by N as a frequency resource unit. .

As another example, the base station provides information explicitly indicating how many symbols a time interval resource unit is composed of or how many RBs (or RBGs) a frequency interval resource unit is composed of higher layer signaling such as RRC. It can also be transmitted to the terminal.

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

Referring to FIG. 7, the user terminal 700 includes a reception unit 710, a control unit 720, and a transmission unit 730.

The receiver 710 receives downlink control information, data, and messages from the base station through a corresponding channel. Specifically, the receiving unit 710 may receive monitoring configuration information for downlink preemption indication information from the base station and also receive downlink preemption indication information.

In this case, as described above, the monitoring configuration information may include information on whether to monitor downlink preemption indication information.

The controller 720 may monitor downlink preemption indication information based on the above-described monitoring setting information.

In this case, the downlink preemption indication information may be indicated through a group-common DCI. The group-common DCI may be transmitted to the terminal through a downlink control channel (PDCCH). That is, the terminal may receive the above-described puncturing indication/preemption indication DCI in the third embodiment.

The downlink preemption indication information may include a bitmap indicating information on a time section resource or a frequency section resource in which preemption occurs in the reference downlink resource. Here, the reference downlink resource means a resource to be preempted as described in FIG. 4.

As an example, the aforementioned bitmap may consist of 14 bits, and each bit of the bitmap may indicate one of M different time period resources and one of N different frequency period resources. At this time, M and N are each a natural number of 1 or more.

In this case, (M*N) different resources may be determined by different M time interval resources and N different frequency interval resources. In order to distinguish each resource, each resource is assigned to a bit of a different bitmap. It should be mapped. Accordingly, two cases of M=14, N=1 or M=7, N=2 can be set among pairs of natural numbers M*N satisfying (M*N) = 14.

In addition, the UE may receive information for setting a unit of a time period resource in which preemption occurs and a unit of a frequency resource, which is information indicated by the downlink preemption indication information, from the base station through higher layer signaling. The unit of the time interval resource may be expressed as a preemption interval described above in the third embodiment, and the unit of the frequency interval resource may be expressed as one or more RBs or RBGs described above in the third embodiment.

As an example, the terminal receives information on which of M=14, N=1 or M=7, N=2 above-described M and N through higher layer signaling such as RRC from the base station, and downlink reference A value obtained by dividing the total time period resource of the link resource by M may be set as a unit of the time period resource, and a value obtained by dividing the total time period resource of the reference downlink resource by N may be set as a unit of frequency resource.

As another example, the UE transmits information explicitly indicating how many symbols the time interval resource unit is composed of or how many RBs (or RBGs) the frequency interval resource unit is composed of higher layer signaling such as RRC from the base station. It can also be received through.

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 should be construed as falling within the scope of the present invention to add the contents of the standard contents and some of the standard documents to the present specification or to describe in the claims.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, 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 following claims, and all technical ideas within the scope equivalent thereto should be interpreted as being included in the scope of the present invention.

Claims (12)

In a method for a terminal to receive downlink preemption indication information,
Receiving monitoring configuration information for downlink preemption indication information from a base station; And
Based on the monitoring configuration information, the downlink preemption indication information including a bitmap indicating information on a time period resource and a frequency section resource in which preemption occurs in a downlink resource is group-common from the base station. common) including receiving through DCI,
Each bit of the bitmap of the downlink preemption indication information indicates one of the M time period resources and indicates one of the N frequency period resources, wherein the time period resource and the frequency in the unit of the time period resource Indicating the resource of the frequency interval in the unit of the resource of the interval,
In a downlink resource in which preemption occurs, when the total time period resource is composed of T symbols and the total frequency resource is composed of B PRBs, the unit of the time period resource divided by the total time period resource by the M and the total frequency resource Information for setting a unit of a frequency section resource divided by N is received from the base station through higher layer signaling. The method of claim 1,
The bitmap is composed of 14 bits. The method of claim 1,
M and N are,
M=14, N=1 or M=7, N=2. In a method for a base station to transmit downlink preemption indication information,
Configuring monitoring setting information for downlink preemption indication information;
Transmitting the monitoring setting information to a terminal; And
When downlink preemption occurs, the downlink preemption indication information including a bitmap indicating information on the time period resource and frequency section resource in which the preemption occurs in the downlink resource is referred to as a group-common DCI. Including the step of transmitting to the terminal through,
Each bit of the bitmap of the downlink preemption indication information indicates one of M different time period resources and indicates one of N different frequency period resources, wherein the time period in a unit of the time period resource Indicate a resource and the time interval resource in units of the resource of the frequency interval,
In the downlink resource where preemption occurs, when the total time period resource is composed of T symbols and the total frequency resource is composed of B PRBs, the unit of the time period resource divided by the total time period resource by the M and the total frequency resource The information for setting the unit of the frequency section resource divided by N is transmitted to the terminal through higher layer signaling. The method of claim 4,
The bitmap is composed of 14 bits. The method of claim 4,
M and N are,
M=14, N=1 or M=7, N=2. In the terminal receiving downlink preemption indication information,
A receiving unit configured to receive monitoring configuration information for downlink preemption indication information from a base station and receive the downlink preemption indication information from the base station through a group-common DCI from the base station; And
Based on the monitoring setting information, comprising a control unit for monitoring the downlink preemption indication information including a bitmap indicating information on the time section resource and the frequency section resource in which preemption occurs in the downlink resource,
Each bit of the bitmap of the downlink preemption indication information indicates one of M different time period resources and indicates one of N different frequency period resources, wherein the time period in a unit of the time period resource Indicating a resource of the frequency section in a unit of a resource and a resource of the frequency section, indicating the time section resource in a unit of the time section resource and a resource in the frequency section in a unit of resource of the frequency section,
In the downlink resource where preemption occurs, when the total time period resource is composed of T symbols and the total frequency resource is composed of B PRBs, the unit of the time period resource divided by the total time period resource by the M and the total frequency resource The information for setting the unit of the frequency section resource divided by N is received from the base station through higher layer signaling. The method of claim 7,
The bitmap is a terminal consisting of 14 bits. The method of claim 7,
M and N are,
A terminal, characterized in that M = 14, N = 1 or M = 7, N = 2. In the base station for transmitting downlink preemption indication information,
A controller configured to configure monitoring setting information for downlink preemption indication information; And
The monitoring setting information is transmitted to the terminal, and when downlink preemption occurs, the downlink preemption indication information including a bitmap indicating information on the time section resource and frequency section resource in which preemption occurs in the downlink resource Including a transmitter for transmitting to the terminal,
Each bit of the bitmap of the downlink preemption indication information indicates one of M different time period resources and indicates one of N different frequency period resources, wherein the time period in a unit of the time period resource Indicate a resource and the time interval resource in units of the resource of the frequency interval,
In the downlink resource where preemption occurs, when the total time period resource is composed of T symbols and the total frequency resource is composed of B PRBs, the unit of the time period resource divided by the total time period resource by the M and the total frequency resource The information for setting the unit of the frequency section resource divided by N is transmitted to the terminal through higher layer signaling. The method of claim 10,
The bitmap is composed of 14 bits. The method of claim 10,
M and N are,
Base station, characterized in that M = 14, N = 1 or M = 7, N = 2.

Images