KR20220163273A - Method and apparatus for in-band full-duplex communication - Google Patents

Abstract

A method and an apparatus for in-band full-duplex communication are disclosed. A method of a terminal comprises the steps of: receiving, from a base station, configuration information of a guard band configured within a carrier bandwidth; determining a first transmission direction of a first subband configured in a higher frequency region from the guard band within the carrier bandwidth; determining a second transmission direction of a second subband configured in a lower frequency region from the guard band within the carrier bandwidth; determining a third transmission direction of the guard band based on the first transmission direction and the second transmission direction; and performing communication with the base station according to the third transmission direction in the guard band. According to the present invention, the performance of a communication system can be improved.

Description

Same band full-duplex communication method and apparatus {METHOD AND APPARATUS FOR IN-BAND FULL-DUPLEX COMMUNICATION}

The present invention relates to a technology for transmitting and receiving signals in a communication system, and more particularly, to a technology for performing and supporting same-band full-duplex communication in a communication system.

In order to establish an infrastructure for accelerating the growth of various future industries, a communication system (eg, a new radio (NR) communication system) that is more advanced than a conventional communication system (eg, a long term evolution (LTE) communication system) is is being considered The NR communication system can support a frequency band of 6 GHz or more as well as a frequency band of 6 GHz or less, and can support various communication services and scenarios compared to the LTE communication system. For example, a usage scenario of the NR communication system may include enhanced mobile broadband (eMBB), ultra reliable low latency communication (URLLC), and massive machine type communication (mMTC). Communication technologies are needed to satisfy the various requirements of the industry.

An object of the present invention to solve the above problems is to provide a method and apparatus for performing and supporting same-band full-duplex communication in a communication system.

A method of a terminal according to a first embodiment of the present invention for achieving the above object includes receiving configuration information of a guard band set within a carrier bandwidth from a base station, and a higher rank based on the guard band within the carrier bandwidth. Determining a first transmission direction of a first subband set in the frequency domain, determining a second transmission direction of a second subband set in a lower frequency domain based on the guard band within the carrier bandwidth; determining a third transmission direction of the guard band based on the first transmission direction and the second transmission direction; and performing communication with the base station according to the third transmission direction in the guard band. .

Each of the first transmission direction, the second transmission direction, and the third transmission direction may be downlink, uplink, or flexible, and the first transmission direction, the second transmission direction, and the third transmission direction may be flexible. may be applied to the same time interval, and the guard band may be regarded as a transmission resource used for the communication based on the first transmission direction and the second transmission direction.

When both the first transmission direction and the second transmission direction are downlink, the third transmission direction may be determined as the downlink, and the communication may be downlink communication.

When both the first transmission direction and the second transmission direction are uplink, the third transmission direction may be determined as the uplink, and the communication may be uplink communication.

When the first transmission direction is flexible, the third transmission direction may be determined identically to the second transmission direction, and the communication having the same transmission direction may be performed in the second subband and the guard band.

The first transmission direction and the second transmission direction may be determined based on information included in a message received from the base station.

Each of the guard band, the first subband, and the second subband may include one or more consecutive RBs.

The first transmission direction, the second transmission direction, and the third transmission direction may be applied to a first time interval, and a fourth transmission direction of the first subband in a second time interval different from the first time interval. and a fifth transmission direction of the second subband may be set, and in the second time period, the guard band is used as a resource not used for the communication based on the fourth transmission direction and the fifth transmission direction. can be considered

The fourth transmission direction may be uplink, and the fifth transmission direction may be downlink.

The fourth transmission direction may be flexible, and the fifth transmission direction may be one of downlink and uplink.

In order to achieve the above object, a method of a base station according to a second embodiment of the present invention includes transmitting configuration information of a guard band set within a carrier bandwidth to a terminal, and a higher rank based on the guard band within the carrier bandwidth. Determining a first transmission direction of a first subband set in the frequency domain, determining a second transmission direction of a second subband set in a lower frequency domain based on the guard band within the carrier bandwidth; determining a third transmission direction of the guard band based on the first transmission direction and the second transmission direction; and performing communication with the terminal according to the third transmission direction in the guard band. .

Each of the first transmission direction, the second transmission direction, and the third transmission direction may be downlink, uplink, or flexible, and the first transmission direction, the second transmission direction, and the third transmission direction may be flexible. may be applied to the same time interval, and the guard band may be regarded as a transmission resource used for the communication based on the first transmission direction and the second transmission direction.

When both the first transmission direction and the second transmission direction are downlink, the third transmission direction may be determined as the downlink, and the communication may be downlink communication.

When both the first transmission direction and the second transmission direction are uplink, the third transmission direction may be determined as the uplink, and the communication may be uplink communication.

When the first transmission direction is flexible, the third transmission direction may be determined identically to the second transmission direction, and the communication having the same transmission direction may be performed in the second subband and the guard band.

The method of the base station may further include transmitting a message including information for determining the first transmission direction and the second transmission direction to the terminal, the first transmission direction and the second transmission direction. A direction may be determined based on the information included in the message.

Each of the guard band, the first subband, and the second subband may include one or more consecutive RBs.

The first transmission direction, the second transmission direction, and the third transmission direction may be applied to a first time interval, and a fourth transmission direction of the first subband in a second time interval different from the first time interval. and a fifth transmission direction of the second subband may be set, and in the second time period, the guard band is used as a resource not used for the communication based on the fourth transmission direction and the fifth transmission direction. can be considered

The fourth transmission direction may be uplink, and the fifth transmission direction may be downlink.

The fourth transmission direction may be flexible, and the fifth transmission direction may be one of downlink and uplink.

According to the present application, a transmission direction of a guard band may be determined based on transmission directions of adjacent subband(s). When the transmission direction of the guard band is determined to be downlink, downlink communication can be performed in the guard band. When the transmission direction of the guard band is determined to be uplink, uplink communication can be performed in the guard band. Since the guard band is used as a transmission resource, the efficiency of resource use can be improved and the performance of the communication system can be improved.

1 is a conceptual diagram illustrating a first embodiment of a communication system.
Figure 2 is a block diagram showing a first embodiment of a device.
3 is a conceptual diagram illustrating a first embodiment of a same-band full-duplex communication method.
4 is a conceptual diagram illustrating a first embodiment of a method of multiplexing an uplink signal and a downlink signal in full-duplex communication.
5 is a conceptual diagram illustrating a first embodiment of a method of setting a resource region for uplink transmission and downlink transmission in a terminal.
6 is a conceptual diagram illustrating a second embodiment of a method of setting a resource region for uplink transmission and downlink transmission in a terminal.
7 is a conceptual diagram illustrating a third embodiment of a method of setting a resource region for uplink transmission and downlink transmission in a terminal.
8A is a conceptual diagram illustrating a first embodiment of a method for configuring subbands and/or guard bands.
8B is a conceptual diagram illustrating a second embodiment of a method for configuring subbands and/or guard bands.
8C is a conceptual diagram illustrating a third embodiment of a method for configuring subbands and/or guard bands.
9A is a conceptual diagram illustrating a first embodiment of a method for setting a full-duplex resource region.
9B is a conceptual diagram illustrating a second embodiment of a method for setting a full-duplex resource region.
10A is a conceptual diagram illustrating a third embodiment of a method for setting a full-duplex resource region.
10B is a conceptual diagram illustrating a fourth embodiment of a method for setting a full-duplex resource region.
11 is a conceptual diagram illustrating a first embodiment of a signal transmission method in a full-duplex section.
12 is a conceptual diagram illustrating a second embodiment of a signal transmission method in a full-duplex section.

Since the present invention can make various changes and have various embodiments, specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, or substitutes included in the spirit and technical scope of the present invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. These terms are only used for the purpose of distinguishing one component from another. For example, a first element may be termed a second element, and similarly, a second element may be termed a first element, without departing from the scope of the present invention. The term "and/or" includes any combination of a plurality of related listed items or any of a plurality of related listed items.

In embodiments of the present application, “at least one of A and B” may mean “at least one of A or B” or “at least one of combinations of one or more of A and B”. Also, in the embodiments of the present application, “one or more of A and B” may mean “one or more of A or B” or “one or more of combinations of one or more of A and B”.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

Terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, the terms "include" or "have" are intended to designate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, but one or more other features It should be understood that the presence or addition of numbers, steps, operations, components, parts, or combinations thereof is not precluded.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in this application, they should not be interpreted in an ideal or excessively formal meaning. don't

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in more detail. In order to facilitate overall understanding in the description of the present invention, the same reference numerals are used for the same components in the drawings, and redundant descriptions of the same components are omitted.

A communication system to which embodiments according to the present invention are applied will be described. The communication system may be a 4G communication system (eg, a long-term evolution (LTE) communication system, an LTE-A communication system), a 5G communication system (eg, a new radio (NR) communication system), a 6G communication system, and the like. have. The 4G communication system can support communication in a frequency band of 6 GHz or less, and the 5G communication system can support communication in a frequency band of 6 GHz or more as well as a frequency band of 6 GHz or less. A communication system to which embodiments according to the present invention are applied is not limited to the contents described below, and embodiments according to the present invention can be applied to various communication systems. Here, the communication system may be used in the same sense as a communication network, "LTE" may indicate "4G communication system", "LTE communication system" or "LTE-A communication system", and "NR" may indicate "5G communication system" or "NR communication system".

In an embodiment, “setting an operation (eg, transmission operation)” means “setting information for the corresponding operation (eg, information element, parameter)” and/or “performing the corresponding operation”. It may mean that the "instructing information" is signaled. "Setting an information element (eg, parameter)" may mean that a corresponding information element is signaled. "Configuring a resource (eg, a resource region)" may mean that configuration information of a corresponding resource is signaled. Signaling is system information (SI) signaling (eg, transmission of system information block (SIB) and / or master information block (MIB)), RRC signaling (eg, transmission of RRC parameters and / or higher layer parameters) , MAC control element (CE) signaling, or PHY signaling (eg, transmission of downlink control information (DCI), uplink control information (UCI), and/or sidelink control information (SCI)).

1 is a conceptual diagram illustrating a first embodiment of a communication system.

Referring to FIG. 1, a communication system 100 includes a plurality of communication nodes 110-1, 110-2, 110-3, 120-1, 120-2, 130-1, 130-2, 130-3, 130-4, 130-5, 130-6). In addition, the communication system 100 includes a core network (eg, a serving-gateway (S-GW), a packet data network (PDN)-gateway (P-GW), and a mobility management entity (MME)). can include more. When the communication system 100 is a 5G communication system (eg, a new radio (NR) system), the core network includes an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), and the like. can include

The plurality of communication nodes 110 to 130 may support communication protocols (eg, LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.) defined in the 3rd generation partnership project (3GPP) standard. The plurality of communication nodes 110 to 130 are CDMA (code division multiple access) technology, WCDMA (wideband CDMA) technology, TDMA (time division multiple access) technology, FDMA (frequency division multiple access) technology, OFDM (orthogonal frequency division) multiplexing) technology, filtered OFDM technology, CP (cyclic prefix)-OFDM technology, DFT-s-OFDM (discrete Fourier transform-spread-OFDM) technology, OFDMA (orthogonal frequency division multiple access) technology, SC (single carrier)-FDMA technology, NOMA (Non-orthogonal Multiple Access) technology, GFDM (generalized frequency division multiplexing) technology, FBMC (filter bank multi-carrier) technology, UFMC (universal filtered multi-carrier) technology, SDMA (Space Division Multiple Access) technology, etc. can support Each of the plurality of communication nodes may mean an apparatus or a device. Embodiments may be performed by an apparatus or device. The structure of the device (eg, device) may be as follows.

Figure 2 is a block diagram showing a first embodiment of a device.

Referring to FIG. 2 , an apparatus 200 may include at least one processor 210, a memory 220, and a transceiver 230 connected to a network to perform communication. In addition, the device 200 may further include an input interface device 240 , an output interface device 250 , a storage device 260 , and the like. Each component included in the device 200 may be connected by a bus 270 to communicate with each other.

The processor 210 may execute a program command stored in at least one of the memory 220 and the storage device 260 . The processor 210 may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which methods according to embodiments of the present invention are performed. Each of the memory 220 and the storage device 260 may include at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory 220 may include at least one of a read only memory (ROM) and a random access memory (RAM).

Referring back to FIG. 1, the communication system 100 includes a plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2), a plurality of terminals 130- 1, 130-2, 130-3, 130-4, 130-5, 130-6). Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may form a macro cell. Each of the fourth base station 120-1 and the fifth base station 120-2 may form a small cell. The fourth base station 120-1, the third terminal 130-3, and the fourth terminal 130-4 may belong to the cell coverage of the first base station 110-1. The second terminal 130-2, the fourth terminal 130-4, and the fifth terminal 130-5 may belong to the cell coverage of the second base station 110-2. The fifth base station 120-2, the fourth terminal 130-4, the fifth terminal 130-5, and the sixth terminal 130-6 may belong to the cell coverage of the third base station 110-3. have. The first terminal 130-1 may belong to the cell coverage of the fourth base station 120-1. The sixth terminal 130-6 may belong to the cell coverage of the fifth base station 120-2.

Here, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 is a NodeB (NB), an evolved NodeB (eNB), a gNB, an advanced base station (ABS), and a HR -BS (high reliability-base station), BTS (base transceiver station), radio base station, radio transceiver, access point, access node, radio access station (RAS) ), MMR-BS (mobile multihop relay-base station), RS (relay station), ARS (advanced relay station), HR-RS (high reliability-relay station), HNB (home NodeB), HeNB (home eNodeB), It may be referred to as a road side unit (RSU), a radio remote head (RRH), a transmission point (TP), a transmission and reception point (TRP), and the like.

Each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 includes user equipment (UE), terminal equipment (TE), advanced mobile station (AMS), HR-MS (high reliability-mobile station), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, mobile It may be referred to as a portable subscriber station, a node, a device, an on board unit (OBU), and the like.

Meanwhile, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may operate in different frequency bands or may operate in the same frequency band. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to each other through an ideal backhaul link or a non-ideal backhaul link, and , information can be exchanged with each other through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be connected to the core network through an ideal backhaul link or a non-ideal backhaul link. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits a signal received from the core network to a corresponding terminal 130-1, 130-2, 130-3, and 130 -4, 130-5, 130-6), and signals received from corresponding terminals 130-1, 130-2, 130-3, 130-4, 130-5, 130-6 are transmitted to the core network can be sent to

In addition, each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 transmits MIMO (eg, single user (SU)-MIMO, multi-user (MU)- MIMO, massive MIMO, etc.), coordinated multipoint (CoMP) transmission, carrier aggregation (CA) transmission, transmission in an unlicensed band, direct communication between devices (device to device communication, D2D) (or , proximity services (ProSe)), Internet of Things (IoT) communication, dual connectivity (DC), etc. may be supported. Here, each of the plurality of terminals 130-1, 130-2, 130-3, 130-4, 130-5, and 130-6 is a base station 110-1, 110-2, 110-3, 120-1 , 120-2) and operations supported by the base stations 110-1, 110-2, 110-3, 120-1, and 120-2 may be performed. For example, the second base station 110-2 can transmit a signal to the fourth terminal 130-4 based on the SU-MIMO scheme, and the fourth terminal 130-4 uses the SU-MIMO scheme. A signal may be received from the second base station 110-2. Alternatively, the second base station 110-2 may transmit a signal to the fourth terminal 130-4 and the fifth terminal 130-5 based on the MU-MIMO scheme, and the fourth terminal 130-4 And each of the fifth terminal 130-5 may receive a signal from the second base station 110-2 by the MU-MIMO method.

Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 may transmit a signal to the fourth terminal 130-4 based on the CoMP scheme, and The terminal 130-4 may receive signals from the first base station 110-1, the second base station 110-2, and the third base station 110-3 by CoMP. Each of the plurality of base stations 110-1, 110-2, 110-3, 120-1, and 120-2 includes a terminal 130-1, 130-2, 130-3, and 130-4 belonging to its own cell coverage. , 130-5, 130-6) and a CA method. Each of the first base station 110-1, the second base station 110-2, and the third base station 110-3 controls D2D between the fourth terminal 130-4 and the fifth terminal 130-5. and each of the fourth terminal 130-4 and the fifth terminal 130-5 may perform D2D under the control of the second base station 110-2 and the third base station 110-3, respectively. .

Methods for transmitting and receiving signals in a communication system will be described. In particular, methods for in-band full-duplex communication in a communication system will be described. The following embodiments may be applied not only to the NR communication system but also to other communication systems (eg, LTE communication system, 5G (fifth generation) communication system, 6G (sixth generation) communication system, etc.).

Numerology applied to physical signals and channels in a communication system (eg, NR communication system, 6G communication system) may be variable. The numerology can be varied to meet the various technical requirements of a communication system. In a communication system to which a cyclic prefix (CP) based OFDM waveform technology is applied, the numerology may include a subcarrier interval and a CP length (or CP type). Table 1 may be a first embodiment of a numerology configuration method for a CP-OFDM based communication system. Adjacent subcarrier intervals may have an exponential multiplication of 2 with each other, and the CP length may be scaled by the same ratio as the OFDM symbol length. At least some of the numerologies of Table 1 may be supported according to the frequency band in which the communication system operates. In addition, numerology(s) not listed in Table 1 may be further supported in the communication system. For a specific subcarrier interval (eg, 60 kHz), CP type(s) (eg, extended CP) not listed in Table 1 may be additionally supported.

Below, the frame structure of the communication system will be explained. Elements constituting a frame structure in the time domain may include subframes, slots, mini-slots, symbols, and the like. A subframe may be used as a unit of transmission or measurement, and the length of a subframe may have a fixed value (eg, 1 ms) regardless of a subcarrier interval. A slot may contain contiguous symbols (eg, 14 OFDM symbols). The length of the slot may be variable, different from the length of the subframe. For example, the length of a slot may be inversely proportional to the subcarrier spacing.

A slot may be used as a unit of transmission, measurement, scheduling, resource configuration, timing (eg, scheduling timing, hybrid automatic repeat request (HARQ) timing, channel state information (CSI) measurement and reporting timing, etc.). The length of an actual time resource used for transmission, measurement, scheduling, resource configuration, etc. may not match the length of a slot. A minislot may contain consecutive symbol(s), and the length of a minislot may be shorter than the length of a slot. A minislot may be used as a unit of transmission, measurement, scheduling, resource configuration, timing, and the like. The mini-slot (eg, the length of the mini-slot, the boundary of the mini-slot, etc.) may be predefined in the technical specification. Alternatively, the mini-slot (eg, mini-slot length, mini-slot boundary, etc.) may be set (or instructed) in the terminal. When a specific condition is satisfied, the use of the mini-slot may be set (or instructed) in the terminal.

The base station may schedule a data channel (eg, physical downlink shared channel (PDSCH), physical uplink shared channel (PUSCH), physical sidelink shared channel (PSSCH)) using some or all of the symbols constituting the slot. . In particular, a data channel may be transmitted using a portion of a slot for URLLC transmission, unlicensed band transmission, transmission in a coexistence situation between an NR communication system and an LTE communication system, and multi-user scheduling based on analog beamforming. Also, the base station may schedule a data channel using a plurality of slots. Also, the base station may schedule a data channel using at least one minislot.

Elements constituting the frame structure in the frequency domain may include a resource block (RB), a subcarrier, and the like. One RB may include consecutive subcarriers (eg, 12 subcarriers). The number of subcarriers constituting one RB may be constant regardless of numerology. In this case, the bandwidth occupied by one RB may be proportional to the subcarrier spacing of the numerology. An RB may be used as a unit of transmission and resource allocation of data channels, control channels, and the like. Resource allocation of the data channel may be performed in units of RBs or RB groups (eg, resource block group (RBG)). One RBG may include one or more contiguous RBs. Resource allocation of the control channel may be performed in units of control channel elements (CCEs). In the frequency domain, one CCE may include one or more RBs.

In a communication system, a slot (eg, slot format) is one or more of a downlink (DL) section, a flexible section (or unknown section), and an uplink (UL) section It may consist of a combination of Each of the downlink period, flexible period, and uplink period may consist of one or more consecutive symbols. The flexible period may be located between a downlink period and an uplink period, between a first downlink period and a second downlink period, between a first uplink period and a second uplink period, and the like. When a flexible period is inserted between a downlink period and an uplink period, the flexible period may be used as a guard period.

A slot may contain one or more flexible intervals. Alternatively, a slot may not include a flexible section. The terminal may perform a predefined operation in the flexible period. Alternatively, the terminal may perform semi-static or periodically set operations by the base station in the flexible period. For example, the operations periodically configured by the base station include a physical downlink control channel (PDCCH) monitoring operation, a synchronization signal/physical broadcast channel (SS/PBCH) block reception and measurement operation, and a channel state information-reference signal (CSI-RS) Reception and measurement operation, downlink SPS (semi-persistent scheduling) PDSCH reception operation, SRS (sounding reference signal) transmission operation, PRACH (physical random access channel) transmission operation, and PUCCH (physical uplink control channel) transmission operation configured periodically , a PUSCH transmission operation according to a configured grant, and the like. A flexible symbol may be overridden with a downlink symbol or an uplink symbol. When a flexible symbol is overridden by a downlink or uplink symbol, the terminal can perform a new operation instead of an existing operation in the corresponding flexible symbol (eg, the overridden flexible symbol).

The slot format may be set semi-fixedly by higher layer signaling (eg, radio resource control (RRC) signaling). Information indicating the semi-static slot format may be included in system information, and the semi-static slot format may be set cell-specifically. In addition, the semi-static slot format may be additionally configured for each UE through UE-specific higher layer signaling (eg, RRC signaling). A flexible symbol of a cell-specific slot format may be overridden with a downlink symbol or an uplink symbol by UE-specific higher layer signaling. In addition, the slot format may be dynamically indicated by physical layer signaling (eg, a slot format indicator (SFI) included in downlink control information (DCI)). A slot format set semi-fixedly can be overridden by a dynamically indicated slot format. For example, a semi-fixed flexible symbol may be overridden by a downlink symbol or an uplink symbol by SFI.

The base station and the terminal may perform a downlink operation, an uplink operation, a sidelink operation, and the like in a bandwidth part. The bandwidth portion may be defined as a set of RBs (eg, physical resource blocks (PRBs)) having a specific numerology. RBs constituting one bandwidth portion may be continuous in the frequency domain. One numerology may be used for signal transmission (eg control channel or data channel transmission) in one bandwidth portion. In embodiments, "signal" may refer to any physical signal and channel when used in a broad sense. A terminal performing an initial access procedure may obtain configuration information of an initial bandwidth part from a base station through system information. A UE operating in an RRC connected state may obtain configuration information of a bandwidth part from a base station through UE-specific higher layer signaling.

The setting information of the bandwidth part may include numerology (eg, subcarrier spacing and/or CP length) applied to the bandwidth part. In addition, the setting information of the bandwidth part further includes information indicating the location of the starting RB (eg, starting PRB) of the bandwidth part and information indicating the number of RBs (eg, PRBs) constituting the bandwidth part. can do. At least one bandwidth part among the bandwidth part(s) set in the terminal may be activated. For example, one uplink bandwidth portion and one downlink bandwidth portion may each be activated within one carrier. In a time division duplex (TDD) based communication system, a pair of an uplink bandwidth portion and a downlink bandwidth portion may be activated. The base station can set a plurality of bandwidth parts to the terminal within one carrier, and can switch the active bandwidth part of the terminal.

In embodiments, RB may mean a common RB (CRB). Alternatively, RB may mean PRB or virtual RB (VRB). In a communication system, a CRB may refer to an RB constituting a set of consecutive RBs (eg, a common RB grid) based on a reference frequency (eg, point A). Carriers, bandwidth portions, etc. may be placed on a common RB grid. That is, the carrier, bandwidth portion, etc. may be composed of CRB(s). An RB or CRB constituting the bandwidth portion may be referred to as a PRB, and a CRB index within the bandwidth portion may be appropriately converted to a PRB index. In an embodiment, RB may mean an interlace RB (IRB).

The smallest resource unit constituting the PDCCH may be a resource element group (REG). A REG may consist of one PRB (eg, 12 subcarriers) in the frequency domain and one OFDM symbol in the time domain. Accordingly, one REG may include 12 resource elements (REs). A demodulation reference signal (DM-RS) for decoding (or demodulation) of the PDCCH may be mapped to 3 REs among 12 REs constituting the REG, and control information (eg, modulated DCI) may be It can be mapped to the remaining 9 REs.

One PDCCH candidate may consist of one CCE or aggregated CCEs. One CCE may consist of a plurality of REGs. The NR communication system may support CCE aggregation levels 1, 2, 4, 8, 16, etc., and one CCE may consist of 6 REGs.

A control resource set (CORESET) may be a resource region in which a terminal performs blind decoding (or blind demodulation) of a PDCCH. CORESET may consist of a plurality of REGs. CORESET may consist of one or more PRBs in the frequency domain and one or more symbols (eg, OFDM symbols) in the time domain. Symbols constituting one CORESET may be consecutive in the time domain. PRBs constituting one CORESET may be continuous or discontinuous in the frequency domain. One DCI (eg, one DCI format, one PDCCH) may be transmitted within one CORESET. A plurality of CORESETs may be configured from a cell point of view or a terminal point of view, and the plurality of CORESETs may overlap each other in time-frequency resources.

CORESET may be set in the terminal by PBCH (eg, system information transmitted through PBCH, master information block (MIB)). ID (identifier) of CORESET set by PBCH may be 0. That is, CORESET set by PBCH may be referred to as CORESET #0. A UE operating in an RRC idle state may perform a monitoring operation in CORESET #0 to receive an initial PDCCH in an initial access procedure. Not only a terminal operating in an RRC idle state, but also a terminal operating in an RRC connected state can perform a monitoring operation in CORESET #0. CORESET may be set in the terminal by other system information (eg, system information block type 1 (SIB1)) in addition to system information transmitted through the PBCH. For example, in order to receive a random access response (or Msg2) in a random access procedure, the terminal may receive SIB1 including configuration information of CORESET. In addition, CORESET may be configured in the UE by UE-specific higher layer signaling (eg, RRC signaling).

One or more CORESETs for each downlink bandwidth portion may be configured for the UE. The UE may monitor the PDCCH candidate(s) for the CORESET set in the corresponding bandwidth portion in the downlink active bandwidth portion. Alternatively, the UE may monitor PDCCH candidate(s) for a CORESET (eg, CORESET #0) set in a downlink bandwidth portion other than the corresponding bandwidth portion in the downlink active bandwidth portion. The initial downlink active bandwidth part may include CORESET #0 and may be combined with CORESET #0. CORESET having a quasi co-location (QCL) relationship with the SS/PBCH block in the primary cell (PCell), secondary cell (SCell), and/or primary secondary cell (PSCell) #0 may be set for the terminal. In the secondary cell, CORESET #0 may not be set for the UE.

A search space may be a set of PDCCH candidate(s) or a set of resource regions occupied by the PDCCH candidate(s). The UE may perform blind decoding on each of the PDCCH candidates within a predefined search space. The UE can determine whether the PDCCH has been transmitted to itself by performing a cyclic redundancy check (CRC) on the blind decoding result. When it is determined that the PDCCH is a PDCCH for the UE, the UE may receive the PDCCH. The terminal may periodically monitor the search space, and may monitor the search space at one or more time positions (eg, PDCCH monitoring location, CORESET) within one period.

The PDCCH candidate may consist of CCE(s) selected by a predefined hash function within a CORESET or search space occasion. The search space may be defined/configured for each CCE aggregation level. In this case, the sum of search spaces for all CCE aggregation levels may be referred to as a search space set. A "search space" may mean a "search space set", and a "search space set" may mean a "search space".

A search space set may be logically associated with or correspond to one CORESET. One CORESET may be logically combined with or correspond to one or more search space sets. A search space set for transmitting a common DCI or a group common DCI may be referred to as a common search space set (hereinafter referred to as "CSS set"). Common DCI or group common DCI may include at least one of resource allocation information of PDSCH for transmission of system information, paging, power control command, SFI, or preemption indicator. In the case of an NR communication system, the common DCI may correspond to DCI formats 0_0, 1_0, etc., system information-radio network temporary identifier (SI-RNTI), paging-RNTI (P-RNTI), random access-RNTI (RA-RNTI) ), TC-RNTI (temporary cell-RNTI), etc., the common DCI cyclic redundancy check (CRC) may be scrambled and transmitted. The group common DCI may correspond to DCI format 2_X (X = 0, 1, 2, ...), etc., and the CRC of the group common DIC may be scrambled and transmitted using slot format indicator-RNTI (SFI-RNTI). CSS sets may include Type 0, Type 0A, Type 1, Type 2, and Type 3 CSS sets.

A search space set for transmitting a UE-specific DCI may be referred to as a UE-specific search space set (hereinafter referred to as a "USS set"). The UE-specific DCI may include scheduling and resource allocation information such as PDSCH, PUSCH, and PSSCH. In the case of an NR communication system, the UE-specific DCI may correspond to DCI formats 0_1, 0_2, 1_1, 1_2, 3_0, 3_1, etc., C-RNTI, CS-RNTI (configured scheduling-RNTI), MCS-C-RNTI ( modulation and coding scheme (C-RNTI), etc., the CRC of the UE-specific DCI may be scrambled and transmitted. Considering scheduling freedom or fallback transmission, a UE-specific DCI may be transmitted even in a CSS set. In this case, the UE-specific DCI may be transmitted according to a DCI format corresponding to the common DCI. For example, the UE can monitor a PDCCH (eg, DCI format 0_0, 0_1) in which a CRC is scrambled with C-RNTI, CS-RNTI, MCS-C-RNTI, etc. in a CSS set.

A type 0 CSS set may be used for reception of DCI scheduling a PDSCH including SIB1 and may be configured through PBCH or cell-specific RRC signaling. The ID of a type 0 CSS set may be given or set to 0. A type 0 CSS set can be logically combined with CORESET #0.

The UE may assume that the PDCCH DM-RS has a QCL relationship with a certain signal (eg, SS/PBCH block, CSI-RS, PDSCH DM-RS, PDCCH DM-RS, etc.). In addition, since the PDCCH has the same antenna port as the PDCCH DM-RS, the PDCCH and the PDCCH DM-RS may have a QCL relationship with each other. Therefore, the UE can obtain information on the large-scale propagation characteristics of the radio channel experienced by the PDCCH and the PDCCH DM-RS through the QCL assumption, and use the information on the large-scale propagation characteristics for channel estimation and reception beam formation. etc. can be used. The QCL parameter is at least one of delay spread, Doppler spread, Doppler shift, average gain, average delay, or spatial Rx parameter. can include The spatial reception parameter may correspond to at least one characteristic of a reception beam, a reception channel spatial correlation, or a transmission/reception beam pair. For convenience, the spatial reception parameter may be referred to as "spatial QCL". PDCCH may be used in the meaning of including PDCCH DM-RS, and that the PDCCH has a QCL relationship with a certain signal may include the meaning that the DM-RS of the PDCCH has a QCL relationship with the certain signal. A signal or resource having a PDCCH and QCL relationship may be referred to as a QCL source, a QCL source signal, or a QCL source resource.

PDCCHs transmitted in the same CORESET (and corresponding search space set, PDCCH monitoring occasion, etc.) may have the same QCL relationship. That is, an aggregation unit in which the UE assumes the same QCL may be a CORESET, and QCL assumptions in each of the CORESETs may be independent. In an embodiment, QCL, QCL source, etc. of a certain CORESET may mean QCL, QCL source, etc. of a PDCCH received through a corresponding CORESET, respectively. Exceptionally, different QCL assumptions may be applied to search space sets corresponding to one CORESET. For example, a search space set for monitoring RA-RNTI (eg, a type 1 CSS set) and other search space sets may have different QCL relationships.

The QCL relationship or QCL assumption (eg, QCL source, QCL type, etc.) of CORESET may be determined by a predefined method. For example, in a terminal, a PDCCH DM-RS received through a certain CORESET or a certain search space set is selected in the course of performing an initial access or random access procedure, and a SS/PBCH block and/or CSI-RS and a predefined QCL type It can be assumed to have a QCL relationship for . Here, the QCL type may mean a set of one or more QCL parameter(s). Alternatively, the QCL relationship or QCL assumption (eg, QCL source, QCL type, etc.) of the CORESET is signaled from the base station to the terminal (eg, RRC signaling, medium access control (MAC) control element (CE) signaling, DCI signaling) , a combination of the above signaling, etc.). That is, the base station may set a transmission configuration information (TCI) state for CORESET in the terminal. In general, a TCI state is an ID of a signal having a QCL relationship with a DM-RS (eg, PDCCH DM-RS) of a physical channel to which TCI is applied (eg, a QCL source and a QCL source resource of PDCCH DM-RS) And / or may include at least one QCL type therefor. For example, the base station may configure one or more TCI state candidates for each CORESET through RRC signaling to the UE, and MAC signaling (or DCI Signaling) can be instructed or set to the terminal. If there is one TCI state candidate configured by RRC signaling, the MAC signaling procedure (or DCI signaling procedure) may be omitted. The terminal may perform PDCCH monitoring and reception operations for the corresponding CORESET based on the TCI state configuration information received from the base station.

Meanwhile, duplex communication between communication nodes (eg, a base station and a terminal) may be performed based on a half-duplex method or a full-duplex method. According to the half-duplex method, a communication node can perform only one of an operation of transmitting a signal and an operation of receiving a signal at a time. In other words, the communication node may not simultaneously perform a transmission operation and a reception operation. According to the full-duplex method, a communication node can perform a transmission operation and a reception operation simultaneously or at different times.

Full-duplex communication can be easily performed in a frequency division duplex (FDD) system (eg, a system using an FDD carrier, paired spectrum, etc.). The communication node may perform a transmission operation and a reception operation in each of the separated frequency domains (eg, uplink carrier and downlink carrier). In this case, interference between the transmitted signal and the received signal may be very small. On the other hand, in a TDD system (eg, a system using a TDD carrier, unpaired spectrum, etc.), communication nodes share a common frequency domain (eg, a carrier commonly used for uplink and downlink transmission) Sending and receiving operations can be performed within When a transmission operation and a reception operation are simultaneously performed, the transmission signal may interfere with the reception signal. Therefore, a self-interference cancellation technique may be required to perform full-duplex communication in a TDD system. Full-duplex communication in a TDD system may be referred to as in-band full-duplex communication. Meanwhile, half-duplex communication can be easily performed in the FDD system and the TDD system because there is no interference problem described above.

3 is a conceptual diagram illustrating a first embodiment of a same-band full-duplex communication method.

Referring to FIG. 3, a base station may perform bi-directional communication with a terminal (s) based on a full-duplex scheme. That is, the base station can perform a transmission operation and a reception operation simultaneously (eg, at the same time point). On the other hand, the terminal can perform only one of the transmission operation and the reception operation at one time. For example, the base station may transmit a downlink signal to a first terminal at time t1 and may receive an uplink signal from a second terminal at time t1 simultaneously with a transmission operation of the downlink signal. A downlink signal and an uplink signal may be transmitted in the same band (eg, within the same carrier). In this case, the downlink signal may act as self-interference in reception of the uplink signal in the base station. The base station can enhance the reception performance of the uplink signal by removing or mitigating self-interference before detecting the uplink signal from the received signal.

In addition, the uplink signal transmitted by the second terminal may act as interference to reception of the downlink signal of the first terminal. Interference between an uplink signal and a downlink signal (eg, an uplink signal and a downlink signal transmitted from different communication nodes (ie, devices)) may be referred to as cross-link interference. . "When the distance between the first terminal and the second terminal is short" or "when the transmission beam direction of the uplink signal in the second terminal is similar to the direction of the first terminal", the cross-link interference of the uplink signal to the downlink signal may be large. Accordingly, the reception performance of the downlink signal in the first terminal may be deteriorated. In particular, when UE 1 does not have the ability to cancel cross-link interference, degradation of reception performance may be more serious.

In order to solve the above-described cross-link interference problem between terminals, an uplink signal and a downlink signal in the same band full-duplex communication may be transmitted in different resource regions (eg, time-frequency resource regions). For example, an uplink signal and a downlink signal transmitted in the same band (eg, the same carrier) may be transmitted in different time resource domains. Alternatively, an uplink signal and a downlink signal transmitted in the same band (eg, same carrier) may be transmitted at the same time (eg, at the same time point), and in this case, the uplink signal and the downlink signal are It can be transmitted in different frequency domains.

4 is a conceptual diagram illustrating a first embodiment of a method of multiplexing an uplink signal and a downlink signal in full-duplex communication.

Referring to FIG. 4, uplink signals and downlink signals within one serving cell (or carrier) may be multiplexed and transmitted in different resources (eg, time-frequency resources). Uplink signals may be referred to as UL signals, and downlink signals may be referred to as DL signals. For example, the first downlink signal, the second downlink signal (or the first uplink signal), and the second uplink signal may be transmitted in different time resources. That is, the first downlink signal, the second downlink signal (or the first uplink signal), and the second uplink signal may be transmitted using a time division multiplexing (TDM) method. For another example, the first uplink signal and the second downlink signal may be transmitted in the same time resource and different frequency resources. That is, the first uplink signal and the second downlink signal may be transmitted in a frequency division multiplexing (FDM) method.

A base station can transmit and receive uplink signals and downlink signals. For example, the base station may transmit a second downlink signal to a terminal (eg, a first terminal), and transmit a second downlink signal from another terminal (eg, a second terminal) simultaneously with transmission of the second downlink signal. 1 can receive an uplink signal. In this case, the second downlink signal may act as self-interference (or cross-link interference) when the base station receives the first uplink signal. In addition, the first uplink signal may act as cross-link interference when the first terminal receives the second downlink signal. However, according to this embodiment, the frequency domain in which the first uplink signal is transmitted and the frequency domain in which the second downlink signal is transmitted can be separated from each other, and the aforementioned cross-link interference is mitigated when the frequency domains are sufficiently far apart. It can be. Here, the first terminal and the second terminal may be the first terminal and the second terminal, respectively, in the first embodiment of FIG. 3 .

In embodiments, a method for performing the above-described same-band full-duplex communication and a method for signaling control information therefor will be described. In the following embodiments, single-carrier transmission will be mainly considered, but the proposed method is not limited to single-carrier transmission and can be easily applied to transmission using carrier aggregation. In embodiments, uplink transmission and downlink transmission may be transmitted in the same bandwidth portion or different bandwidth portions (eg, an uplink bandwidth portion and a downlink bandwidth portion), unless otherwise stated. The bandwidth portion(s) may be bandwidth portion(s) configured for the same serving cell or the same carrier. In addition, although a TDD system will be mainly considered in the embodiments, the proposed method can be easily applied to other systems (eg, FDD systems).

[How to set up full-duplex resource area]

A method for configuring a resource region for uplink transmission and downlink transmission by a base station to a terminal for full-duplex communication will be described. Here, uplink transmission may mean transmission of an uplink physical signal and/or channel. For example, uplink transmission may include transmission of at least one of PUSCH, PUCCH, DM-RS, SRS, PRACH, or phase tracking-reference signal (PT-RS). Downlink transmission may mean transmission of a downlink physical signal and/or channel. For example, downlink transmission includes PDSCH, PDCCH, DM-RS, CSI-RS, TRS (tracking reference signal), PT-RS, PRS (positioning reference signal), synchronization signal (eg, PSS (primary synchronization signal) ), a secondary synchronization signal (SSS), a PBCH, an SS/PBCH block, or a discovery signal.

The base station may set (or instruct) one or more resource regions for signal transmission to the terminal. That is, the terminal may receive configuration information of one or more resource regions for signal transmission from the base station. A certain resource region can be used for downlink transmission, and the resource region used for downlink transmission is "downlink resource region (eg, DL resource region)", "downlink region (eg, DL resource region)" area)", or "downlink resource (eg, DL resource)". A certain resource region can be used for uplink transmission, and the resource region used for uplink transmission is "uplink resource region (eg, UL resource region)", "uplink region (eg, UL region) )", or "uplink resource (eg, UL resource)". Some resources may be used for downlink transmission and uplink transmission, and resource regions used for downlink transmission and uplink transmission are "flexible resource regions (eg, FL resource regions)" or "flexible resources (eg, FL resource regions)" For example, FL resources)". Each resource region may be composed of time resources and/or frequency resources. For example, each resource domain is a time interval (eg, a set of slot (s), a set of symbol (s)) and a frequency domain (eg, a set of RB (s), a set of subcarrier (s)) ) can be composed of the intersection of Each resource region is a continuous time interval (eg, a set of consecutive slot (s), a set of consecutive symbol (s)) and a continuous frequency domain (eg, a set of consecutive RB (s), A set of contiguous subcarrier(s)))). Resource region(s) may be configured for each carrier. Alternatively, resource region(s) may be established for each bandwidth portion. The resource region(s) may fall within a "carrier bandwidth" or a "bandwidth within a bandwidth portion".

5 is a conceptual diagram illustrating a first embodiment of a method of setting resource regions for uplink transmission and downlink transmission in a terminal, and FIG. 6 is a conceptual diagram illustrating resource regions for uplink transmission and downlink transmission in a terminal. 7 is a conceptual diagram illustrating a second embodiment of a method, and FIG. 7 is a conceptual diagram illustrating a third embodiment of a method for setting resource regions for uplink transmission and downlink transmission in a terminal.

Referring to FIGS. 5 to 7, like the first embodiment of FIG. 4, uplink signals and downlink signals are multiplexed and transmitted based on a TDM method or an FDM method within one serving cell (or carrier). It can be. The base station may perform a reception operation of uplink signals and a transmission operation of downlink signals. For example, the base station may transmit a second downlink signal to a terminal (eg, a first terminal), and transmit a second downlink signal from another terminal (eg, a second terminal) simultaneously with transmission of the second downlink signal. 1 can receive an uplink signal. The base station may set (or instruct) a resource region for uplink and downlink transmission to a terminal (eg, a first terminal and/or a second terminal). A terminal (eg, terminal 1 and/or terminal 2) may receive resource region configuration information for uplink and downlink transmission from the base station. Here, the first terminal and the second terminal may be the first terminal and the second terminal, respectively, in the embodiment of FIG. 3 .

According to the first embodiment of FIG. 5, each resource region may include a predetermined time interval in the time domain, and all bands in the frequency domain (eg, the carrier(s) to which the corresponding resource region belongs (or bandwidth) It may include all (eg, all RB(s)) of the bandwidth occupied by the portion(s). The base station may set (or instruct) a downlink period, an uplink period, and/or a flexible period to the terminal. The UE may receive configuration information of the downlink interval, the uplink interval, and/or the flexible interval from the base station. A transmission direction (eg, downlink, uplink, flexible, etc.) set in each section may be applied to all bands of the section. This setting may be performed based on the slot format setting (or indication) method described above.

Referring to FIG. 5, for the same or overlapping frequency domain (eg, carrier, bandwidth portion), the base station divides a downlink period (or downlink area) and an uplink period (or uplink area). It can be set (or instructed) in each of the first terminal and the second terminal. Each of the first terminal and the second terminal may receive configuration information of a downlink period (or downlink area) and an uplink period (or uplink area) from the base station. The downlink interval and the uplink interval configured in the terminals may be different from each other. That is, the downlink period and/or uplink period set in the first terminal may be different from the downlink period and/or uplink period set in the second terminal. For example, the first interval and the second interval may be set as a downlink interval for the first terminal, and the third interval may be set as an uplink interval for the first terminal. On the other hand, the first interval may be set as a downlink interval for the second terminal, and the second and third intervals may be set as uplink intervals for the second terminal. The first terminal may receive the first and/or second downlink signals from the base station in the set downlink interval. The second terminal may transmit the first and/or second uplink signals to the base station in the set uplink interval. In this case, in the second period, the first terminal can receive the second downlink signal from the base station, and the second terminal can transmit the first uplink signal to the base station. That is, the second downlink signal and the first uplink signal may be transmitted simultaneously.

According to the second embodiment of FIG. 6, each resource region may include a predetermined time interval in the time domain, and may include all bands or partial bands (eg, subbands) in the frequency domain. For example, each resource region includes all or part (eg, all RB(s) or some RB(s)) of the bandwidth occupied by the carrier(s) (or bandwidth portion(s)) to which it belongs. can do.

In this case, each interval may correspond to one transmission direction and one resource region. For example, each of the first period, the second period, and the third period may be set (or instructed) to a first terminal as a first downlink area, a second downlink area, and a first uplink area. . Each of the first period, the second period, and the third period may be set (or instructed) to the second terminal as a first downlink area, a first uplink area, and a second uplink area. The same interval may be configured in the same resource region or different resource regions in UEs. Each resource region may occupy all or part of the reference frequency region (eg, the bandwidth of the carrier(s), the bandwidth of the bandwidth portion(s)). For example, "the first downlink region and the first uplink region configured in the first terminal" and the "first downlink region and the second uplink region configured in the second terminal" are all of the carrier bandwidth (eg, , may occupy all RB(s) constituting the carrier. On the other hand, the "second downlink region configured in the first terminal" and the "first uplink region configured in the second terminal" may occupy part of the carrier bandwidth (eg, some RB(s) constituting the carrier) have. In this case, the terminal may regard a frequency domain not set as a resource domain as a guard band. For example, UE 1 may regard a frequency region outside the second downlink region in the second interval as a guard band. The operation of the terminal regarding the guard band will be described later. The method described above may be referred to as (method 100).

Alternatively, each interval may correspond to one or more resource region(s) having the same transmission direction. For example, each of the first interval and the third interval may be configured as one resource region (eg, a first downlink region and a first uplink region) in a third terminal, and the second interval may be configured as a third resource region. A plurality of resource regions (eg, a second downlink region and a third downlink region) having the same transmission direction may be set to the UE. A plurality of resource regions (eg, a second downlink region and a third downlink region) may not overlap each other. Guard bands may be arranged in a plurality of resource regions (eg, between the second downlink region and the third downlink region) within the same interval. The method described above may be referred to as (Method 110).

According to the third embodiment of FIG. 7, each resource region may include a predetermined time interval in the time domain and may include all bands or partial bands (eg, subbands) in the frequency domain. For example, each resource region includes all or part (eg, all RB(s) or some RB(s)) of the bandwidth occupied by the carrier(s) (or bandwidth portion(s)) to which it belongs. can do.

In this case, each interval may correspond to one or more resource region(s), and resource region(s) within the same interval may have the same transmission direction or different transmission directions. For example, in each of the first interval and the third interval, one resource region (eg, a first downlink region and a second uplink region) may be configured in the first terminal and the second terminal, and the second A plurality of resource regions (eg, a second downlink region and a first uplink region) having different transmission directions in an interval may be configured in the first terminal and the second terminal. The second downlink region and the first uplink region may not overlap each other. In addition, a guard band may be arranged between a plurality of resource regions (eg, a second downlink region and a first uplink region) in the same period (or the same time point). The method described above may be referred to as (method 120).

In embodiments, the terminal may determine a transmission direction, time resource, and/or frequency resource of each resource region based on configuration information received from the base station. The above configuration information may be transmitted from the base station to the terminal through a signaling procedure (eg, RRC signaling, MAC CE signaling, DCI, etc.). The time resource of each resource region may be a set of slot(s) and/or symbol(s). Specifically, the time resource may be consecutive slot(s) and/or symbol(s) having the same transmission direction. The frequency resource of each resource region may be a set of RB(s) and/or a set of subcarrier(s). Specifically, the frequency resource may be a set of consecutive RB(s) and/or a set of subcarrier(s) having the same transmission direction. The frequency domain configuration unit of each resource region may be one RB or a predefined number of contiguous RB(s). Alternatively, a frequency domain configuration unit of each resource region may be a subband. A subband may be a set of contiguous RB(s). A subband may be referred to as an RB set. RB may be CRB, PRB, or VRB. In the case of unlicensed band communication, a subband may correspond to a unit of a frequency domain in which a communication node performs listen before talk (LBT).

8A is a conceptual diagram illustrating a first embodiment of a method for setting subbands and/or guard bands, FIG. 8B is a conceptual diagram illustrating a second embodiment of a method for setting subbands and/or guard bands, and FIG. It is a conceptual diagram illustrating a third embodiment of a method for setting bands and/or guard bands.

Referring to FIGS. 8A to 8C , the base station may set (or instruct) one or more subband(s) to the terminal. That is, the terminal may receive configuration information of one or more subband(s) from the base station. Subband(s) may be configured within a carrier bandwidth (or bandwidth portion). The base station may set (or instruct) information about a set of RB(s) constituting each subband to the terminal. That is, the terminal can receive information about a set of RB(s) constituting each subband from the base station. For example, the terminal may receive information about the start RB and end RB of each subband. For another example, the UE may receive information about the start RB of each subband and the number of consecutive RB(s).

Referring to FIG. 8A, one subband may be configured in a terminal. In the same or similar manner to the embodiment of FIG. 8A, in the second embodiment of FIG. 6, one subband may be configured for the first terminal and the second terminal. For example, the first subband may be configured in the first terminal, and the second downlink region including the first subband (or corresponding to the first subband) in the second period is the first terminal. can be set in The first subband may be configured in the second terminal, and the first uplink region including the first subband (or corresponding to the first subband) within the second interval may be configured in the second terminal. have.

Referring to FIG. 8B, one or more (eg, two) subband(s) may be configured in a UE. In the same or similar manner to the embodiment of FIG. 8B, in the second embodiment of FIG. 6, a plurality of (eg, two) subbands may be configured in the third terminal. For example, the first subband and the second subband may be configured in a third terminal, and a second downlink region including the first subband within a second interval and a second subband within the second interval. A third downlink region including may be configured in the third terminal.

Referring to FIG. 8C, one or more (eg, two) subband(s) may be configured in a UE. A frequency gap may exist between subbands, and the terminal may regard the frequency gap as a guard band. Each guard band may consist of contiguous RB(s). A frequency range of the guard band (eg, a set of RB(s)) may be determined by frequency ranges of subbands adjacent to the guard band. When the number of configured subband(s) is N, (N-1) guard band(s) may be determined. N may be a natural number. In the embodiment of FIG. 8C, N=2 may be. Some guard bands can be zero in size. When a plurality of numerologies (eg, a plurality of subcarrier intervals) are set for a carrier, a subband and/or a guard band may be set for each subcarrier interval.

The subband(s) and guard band(s) may not overlap each other. Also, the sum of the subband(s) and the guard band(s) may coincide with the carrier bandwidth (ie, all RB(s) constituting the carrier). Alternatively, the sum of the subband(s) and the guard band(s) may match the bandwidth of the bandwidth portion (ie, all RB(s) constituting the bandwidth portion). The starting RB of the first subband (eg, the subband having the lowest frequency position) may coincide with the starting RB of the carrier (or bandwidth portion), and the last subband (eg, the highest frequency position The ending RB of the subband having ) may coincide with the ending RB of the carrier (or bandwidth portion). In this case, information about the start RB of the first subband and the end RB of the last subband may be excluded from the above configuration information. In addition, the guard band may not be arranged at the beginning and end of the carrier (or bandwidth portion). That is, the start RB and the end RB of the carrier (or bandwidth portion) may be included in subbands other than the guard band.

Alternatively, one or more (eg, one) guard band(s) may be configured in the UE. Alternatively, the guard band may not be configured in the terminal. Even in this case, the above-described relationship between the subband(s) and the guard band(s) can be established in the same way. According to the above relationship, the terminal can determine N subband(s) from (N-1) guard band(s). In an embodiment, N=1 may be. That is, the guard band may not be set in the UE. In this case, the terminal can determine one subband, and one subband can occupy the entire band of the carrier or bandwidth portion.

Referring back to FIG. 7 , the first subband and the second subband may be configured in the first terminal and the second terminal, and the first terminal and the second terminal are configured for the first subband and the second subband. Based on this, it is possible to determine the location of the first guard band. For example, the configuration information of the first subband and the second subband may include end RB information of the first subband and start RB information of the second subband. Alternatively, the first guard band may be configured in the first terminal and the second terminal, and the first terminal and the second terminal determine locations of the first subband and the second subband based on the configuration of the first guard band. can For example, the configuration information of the first guard band may include “start RB information and end RB information of the first guard band” or “start RB information and RB number information of the first guard band”. In an embodiment, N=2 may be. A second downlink region including (or corresponding to) the first subband in the second interval and including (or corresponding to) the second subband in the second interval The first uplink region may be configured in UEs. Alternatively, the terminal may receive configuration information on the transmission direction (eg, downlink) of the first subband in the second interval and the transmission direction (eg, uplink) of the second subband in the second interval. and, based on configuration information (eg, transmission direction), each of the first subband and the second subband may be determined as a downlink region and an uplink region.

The terminal may not perform a signal transmission operation in the guard band or at least a partial time interval of the guard band. The terminal may not perform a signal reception operation in the guard band or at least a partial time interval of the guard band. The terminal may apply a bandpass filter (eg, a radio frequency (RF) filter, a digital filter, etc.) to a signal transmitted in each subband based on the guard band and/or the bandwidth of the subband. Accordingly, the magnitude of interference of the transmission signal to adjacent subbands (eg, adjacent subbands in different transmission directions) may be small. The terminal may apply a band pass filter to a signal received in each subband based on the bandwidth of the guard band and/or subband, and may process the filtered downlink signal.

Referring back to FIG. 3 , UE 1 may receive a downlink signal in a first subband, and UE 2 may receive a downlink signal in a second subband adjacent to the first subband at the same time as receiving the aforementioned downlink signal. An uplink signal can be transmitted in the band. A frequency region between the first subband and the second subband may be set as a guard band for the second terminal, and the second terminal may not transmit a signal in the guard band. The second terminal may apply a band pass filter to the uplink signal according to the second subband and the guard band, and transmit the filtered uplink signal. Accordingly, the magnitude of interference of the filtered uplink signal to the downlink signal received by the first terminal in the first subband may be small. That is, the aforementioned cross-link interference problem between terminals can be alleviated. Therefore, the first terminal can perform a reception operation from the base station without considering cross-link interference caused by other communication nodes other than the base station.

The subband(s) and/or guard band(s) configured in the UE may change temporally. For example, subband(s) and/or guard band(s) may be configured in the terminal for each specific time period, and the above configuration may be periodically repeated. Alternatively, the subband(s) and/or guard band(s) set in the UE may not change temporally. That is, settings of subband(s) and/or guard band(s) may be equally applied to all time intervals until resetting. According to the third embodiment of FIG. 7, the first subband, the second subband, and/or the guard band configured in the first terminal and the second terminal include all of the first interval, the second interval, and the third interval. It can be applied commonly to the section.

The above-described UE operation for the guard band may be performed only in a partial time interval of the guard band. That is, the above-described operation may be effective only in a partial time period of the guard band. For each guard band, a period in which the operation of the guard band is valid may be referred to as a valid period, and a period in which the operation of the guard band is not valid may be referred to as an ineffective period. That is, the terminal may not perform a transmission operation and/or a reception operation of a signal on the guard band in the effective period of the guard band. On the other hand, the terminal may perform a transmission operation and/or a reception operation of a signal on the guard band in an ineffective period of the guard band. In the non-valid period, the terminal may not perform an operation of applying a band pass filter based on the guard band.

When two subbands adjacent to a guard band have different transmission directions in a specific interval, the aforementioned specific interval may be an effective interval of the guard band. On the other hand, if two subbands adjacent to the guard band have the same transmission direction in a specific interval, the aforementioned specific interval may be an ineffective interval of the guard band. In the non-valid interval, the guard band may be regarded as a resource region (eg, a resource region having a specific transmission direction). The specific transmission direction may be downlink, uplink, or flexible, and the transmission direction of the guard band may coincide with the transmission directions of two subbands adjacent to the corresponding guard band.

Referring back to FIG. 7 , the first subband, the second subband, and the guard bands disposed between the first subband and the second subband configured in the terminals may not change temporally. However, the guard band may be valid only for some time intervals. For example, since transmission directions of two subbands (eg, a first subband and a second subband) adjacent to a guard band in the second period are different from each other, the second period may be an effective period of the guard band. can

On the other hand, since transmission directions of two subbands (eg, the first subband and the second subband) adjacent to the guard band in the first period and the third period coincide, the first period and the third period are guard bands. It may be an ineffective section of the band. The guard band may be regarded as a resource region having a specific transmission direction in the first interval and the third interval. For example, since subbands (eg, the first subband and the second subband) adjacent to the guard band in the first period are set as downlink areas, the guard band is regarded as a downlink area in the first period. It can be. The downlink region of the guard band and the downlink regions of adjacent subbands may be regarded as one downlink region (eg, a first downlink region) having a continuous frequency range. For another example, since the subbands (eg, the first subband and the second subband) adjacent to the guard band are set as uplink regions in the third interval, the guard band is designated as an uplink region in the third interval. can be considered An uplink region of the guard band and an uplink region of adjacent subbands may be regarded as one uplink region (eg, a second uplink region) having a continuous frequency range.

When a plurality of guard bands are configured in a carrier or bandwidth portion, the above-described operation may be applied for each guard band. That is, for each guard band, "whether the guard band is valid" and/or "transmission direction when the guard band is inactive" are two subbands (or two adjacent subbands) adjacent to the guard band in the corresponding interval. resource regions configured in N subbands) may be determined by transmission directions.

The aforementioned full-duplex resource region configuration information may be transmitted from a base station to a terminal based on a signaling procedure (eg, RRC signaling, MAC CE signaling, DCI, etc.). In some of the above-described embodiments, the setting information may include the above-described slot format setting (or indication) information. Alternatively, the setting information may be included in slot format setting (or indication) information. A resource region for full-duplex communication may be independently set for each terminal. For example, the configuration information may be transmitted to the UE through UE-specific RRC signaling. In embodiments, “setting” may mean semi-fixed setting or dynamic instruction.

In an embodiment, a default transmission direction may be defined for a resource region or subband. When information on a transmission direction for a certain resource region is not received, the terminal may assume a transmission direction in the corresponding resource region as a default transmission direction. A default transmission direction may be predefined in technical specifications. For example, the default transmission direction may be flexible. For another example, the default transmission direction may be one of downlink and uplink. Alternatively, the default transmission direction may be set from the base station to the terminal. In this case, information about the default transmission direction may not be included in the above-described configuration information of the full-duplex resource region. That is, information on the default transmission direction may be included in a separate message transmitted to the terminal.

According to embodiments, a terminal may receive configuration information of resource regions having downlink or uplink transmission directions. Meanwhile, the terminal may receive setting information of a flexible area in addition to the downlink area and the uplink area. The terminal can perform both uplink transmission and downlink transmission in the flexible area. In addition, the terminal may switch from downlink operation to uplink operation in a flexible period (or guard period). In the following embodiments, a method of setting a resource region considering a flexible region will be described.

9A is a conceptual diagram illustrating a first embodiment of a method for setting a full-duplex resource region, and FIG. 9B is a conceptual diagram illustrating a second embodiment of a method for setting a full-duplex resource region.

Referring to FIGS. 9A and 9B , a UE may receive configuration information of resource regions for downlink and uplink transmission from a base station. Each resource region may be a downlink region, an uplink region, and/or a flexible region. The terminal may receive configuration information of the plurality of subbands (ie, the first subband and the second subband) and the guard band by the above-described method. Subbands and guard bands can be configured for a carrier or bandwidth portion.

In embodiments, one or more resource regions may be configured for each time interval, and each resource region may include one or more subbands. For example, in the first interval, subband 1 and subband 2 may be configured as downlink regions, and in interval 5, subband 1 and subband 2 may be configured as uplink regions. In the first interval and the fifth interval, the guard band may be regarded as a resource region having the same transmission direction as the first subband and the second subband, and may be used for signal transmission. Also, in the third interval, the first subband may be set as a downlink region, and the second subband may be set as an uplink region. Since transmission directions of the first subband and the second subband are different in the third interval, the third interval may be an effective interval of the guard band. The terminal may apply a band pass filter to the uplink transmission signal and/or the downlink reception signal based on the guard band in the third period, and cross-link interference may be controlled by applying the band pass filter.

In the second interval, the first subband may be set as a downlink area, and the second subband may be set as a flexible area. In the fourth period, the first subband may be set as a flexible area, and the second subband may be set as an uplink area. "When the transmission direction of one of the two subbands adjacent to the guard band is flexible and the transmission direction of the other subband is uplink or downlink", the corresponding section (eg, second interval and the fourth interval) may be regarded as valid intervals of the guard band. Referring to FIG. 9A, the terminal may regard the second interval and the fourth interval as valid intervals of the guard band. Alternatively, "when the transmission direction of one of the two subbands adjacent to the guard band is flexible and the transmission direction of the other subband is uplink or downlink", the corresponding guard band is described above. It may be regarded as a resource region having the same transmission direction (eg, flexible) as any one subband. Alternatively, in the above case, the corresponding guard band may be regarded as a resource region having the same transmission direction (eg, uplink or downlink) as the other subband described above. Referring to FIG. 9B , the terminal may regard the guard band as a flexible area in the second period and the fourth period. Alternatively, the UE may regard the guard band as a downlink region in the second interval and regard the guard band as an uplink region in the fourth interval. On the other hand, if the transmission directions of subbands adjacent to the guard band are all flexible in a certain period, the terminal may regard the corresponding guard band as an ineffective period and consider the corresponding guard band as a flexible area.

10A is a conceptual diagram illustrating a third embodiment of a method for setting a full-duplex resource region, and FIG. 10B is a conceptual diagram illustrating a fourth embodiment of a method for setting a full-duplex resource region.

Referring to FIGS. 10A and 10B , a UE may receive resource region configuration information for downlink and uplink transmission from a base station. Each resource region may be a downlink region, an uplink region, and/or a flexible region. The terminal may receive configuration information of the plurality of subbands (ie, the first subband and the second subband) and the guard band by the above-described method.

In embodiments, resource regions (or time intervals) may be set for each subband (or for each set of subband(s)). A downlink period, an uplink period, and/or a flexible period may be configured in a terminal for each subband (or for each set of subband(s)). The above configuration may be individually performed for each subband (or set of subband(s)). Referring to FIGS. 10A and 10B , the first to third intervals in the first subband may be set as downlink intervals for the UE, and the fourth interval in the first subband may be set as a flexible interval for the UE. In the first subband, the fifth interval may be configured as an uplink interval for the UE. The first section in the second subband may be set as a downlink section for the UE, the second section in the second subband may be set as a flexible section for the UE, and the third to fifth sections in the second subband. The interval may be set as an uplink interval in the UE. According to the method described above, the terminal can regard the guard band as a downlink region in the first interval and regard the guard band as an uplink region in the fifth interval. In addition, the terminal may consider the guard band to be valid in the third period. Referring to FIG. 10A, the terminal may consider the guard band to be valid in the second interval and the fourth interval. Referring to FIG. 10B, the terminal may regard the guard band as a flexible area in the second period and the fourth period. Alternatively, the UE may regard the guard band as a downlink region in the second interval and regard the guard band as an uplink region in the fourth interval.

According to embodiments, configuration of subband(s) and/or guard band(s) may be commonly applied to downlink and uplink. For example, the same subband(s) and/or guard band(s) may be used for configuration of the downlink region and configuration of the uplink region. Alternatively, subband(s) and/or guard band(s) may be configured for downlink and uplink, respectively. For example, subband(s) and/or guard band(s) for downlink may be used in configuration of a downlink region, and subband(s) and/or subband(s) for uplink in configuration of an uplink region may be used. Guard band(s) may be used. In the uplink transmission procedure, the terminal may perform filtering (eg, band pass filtering) based on subband(s) and/or guard band(s) configured for uplink. In the downlink reception procedure, the terminal may perform filtering (eg, band pass filtering) based on subband(s) and/or guard band(s) configured for downlink.

[Signal transmission method in full-duplex section]

According to embodiments, both an uplink region and a downlink region may be configured in a UE in the same time interval within one carrier or bandwidth portion. Alternatively, in the same time interval, either a resource region or a flexible region among an uplink region and a downlink region may be configured in the terminal. A "interval (or resource region) in which both uplink and downlink transmission are possible" or "interval (or resource region) set in which both uplink and downlink transmission are possible" may be referred to as a full-duplex interval.

The base station can simultaneously perform an uplink reception operation and a downlink transmission operation in a full-duplex interval. The terminal can simultaneously perform an uplink transmission operation and a downlink reception operation in a full-duplex interval. The corresponding terminal may be a terminal having self-interference cancellation capability. Alternatively, the terminal may not simultaneously (or in the same time interval) perform an uplink transmission operation and a downlink reception operation in the full-duplex interval. The corresponding terminal may be a terminal having no self-interference cancellation capability. Here, the downlink reception operation may include a measurement operation based on reception of a downlink signal (eg, radio resource management (RRM) measurement, CSI measurement, and beam quality measurement).

Below, a transmission method for a terminal that does not simultaneously perform a transmission operation and a reception operation will be described. In a first method, a period (eg, duration of an uplink signal) in which the terminal is instructed (or set) to perform an uplink transmission operation and a terminal instructed (or set) to perform a downlink reception operation Periods (eg, durations of downlink signals) may not overlap in time. The terminal may not expect that the above-described sections are set to overlap. Accordingly, the terminal can perform only one of the transmission operation and the reception operation at one point in time. The above-described operation may be applied to an arbitrary time interval including a full-duplex interval. The method described above may be referred to as (method 200).

11 is a conceptual diagram illustrating a first embodiment of a signal transmission method in a full-duplex section.

Referring to FIG. 11, a terminal uses a plurality of subbands (eg, first, second, and third subbands) and/or a plurality of guard bands (eg, first and second protection subbands). bands) may be received. Based on the above configuration information, the downlink area, uplink area, and/or flexible area may be configured in the terminal. At this time, by (method 120), the terminal can receive configuration information of resource regions having different transmission directions in the same section. For example, the downlink region in the first subband of slot n may be configured in the terminal, the downlink region and flexible region in the second subband in slot n may be configured in the terminal, and the third subband in slot n may be configured in the terminal. An uplink region in a subband may be configured in a UE. In slot n, a part of the first guard band may be regarded as a downlink region, and the remaining part of the first guard band may be regarded as a downlink region or a flexible region. In slot n, a part of the second guard band may be regarded as an effective guard band, and the remaining part of the second guard band may be regarded as an uplink region or a flexible region. Slot n may be regarded as a full-duplex interval. Same as or similar to slot n, slot n+1 may be considered a full-duplex interval.

According to (method 200), uplink transmission and downlink transmission may not temporally overlap in a full-duplex interval. In this case, uplink transmission and downlink transmission may be TDM in units of symbols. That is, the terminal may not receive scheduling information or configuration information for both uplink transmission and downlink transmission in the same symbol. Referring to FIG. 11, the terminal may receive scheduling information of the first downlink transmission in some intervals (eg, symbol (s)) of slot n, and in another partial interval (eg, other intervals) of slot n. Scheduling information of the first uplink transmission may be received in symbol(s). The first downlink transmission and the first uplink transmission may not overlap each other in the time domain. Same as or similar to the above-described embodiment, the terminal may receive scheduling information of the second downlink transmission in a partial period (eg, symbol (s)) of slot n + 1, and may receive other scheduling information of slot n + 1 Scheduling information of the second uplink transmission may be obtained in some intervals (eg, other symbol(s)). The terminal can perform both downlink transmission and uplink transmission in slot n and slot n+1, which are full-duplex intervals.

Alternatively, uplink transmission and downlink transmission may be TDM in units of slots. That is, the terminal may not receive scheduling information or configuration information for both uplink transmission and downlink transmission in the same slot. According to the method described above, the terminal may receive scheduling information for either one of the first downlink transmission and the first uplink transmission in slot n. The terminal may receive scheduling information for either the second downlink transmission or the second uplink transmission in slot n+1. The terminal can perform only one of downlink transmission and uplink transmission in each of slot n and slot n+1, which are full-duplex intervals.

Referring to FIG. 11, a first downlink transmission may be performed in a frequency domain including a first guard band. That is, the terminal can receive a downlink signal in a partial period of the guard band (eg, slot n of the first guard band). The second uplink transmission may be performed in a frequency domain including the second guard band. That is, the terminal may transmit an uplink signal in a partial period of the guard band (eg, slot n+1 of the second guard band).

In a method different from (method 200), the terminal is instructed (or configured) to perform an uplink transmission operation (eg, the duration of an uplink signal) and a downlink reception operation (or configured). ) (eg, the duration of the downlink signal) may be allowed to overlap in time. The method described above may be referred to as (method 210). (Method 210) may be applied to a full-duplex section. Alternatively, (method 210) may be applied to a time interval other than the full-duplex interval.

12 is a conceptual diagram illustrating a second embodiment of a signal transmission method in a full-duplex section.

Referring to FIG. 12, a UE is configured to use a plurality of subbands (ie, first, second, and third subbands) and/or a plurality of guard bands (ie, first and second guard bands). You can receive setting information. Based on the above configuration information, a downlink area, an uplink area, and/or a flexible area may be configured in the terminal. In FIG. 12 , specific resource region settings may be the same as or similar to those of the first embodiment of FIG. 11 .

According to (method 210), uplink transmission and downlink transmission may temporally overlap in a full-duplex interval. For example, the terminal may receive scheduling information for the first downlink transmission and the first uplink transmission in slot n, and the first downlink transmission and the first uplink transmission may be temporally (e.g., identical). symbols) may overlap. At this time, the terminal can select any one of the overlapping downlink transmission and uplink transmission, and can perform the selected transmission. The terminal may not perform unselected transmission. For example, the first downlink transmission may be CSI-RS transmission, and the first uplink transmission may be SRS transmission. The UE may transmit or receive one of the CSI-RS and the SRS, and may not transmit or receive the other. Alternatively, the terminal may transmit and receive both at least a part of downlink transmission and at least a part of uplink transmission. In this case, at least a part of the downlink transmission and at least a part of the uplink transmission may not overlap in time. For example, the UE may receive the CSI-RS on all symbol(s) to which the first downlink transmission is allocated, and the second uplink transmission does not overlap with the first downlink transmission among the allocated symbol(s). SRS can be transmitted in symbol (s) that does not. That is, when uplink transmission is SRS transmission, uplink transmission can be performed only on some symbol(s) due to overlap with downlink transmission.

In addition, the terminal may receive scheduling information for the second downlink transmission and the second uplink transmission in slot n+1, and the second downlink transmission and the second uplink transmission are temporally (eg, identical). symbols) may overlap. For example, the second downlink transmission may be a PDSCH transmission, and the second uplink transmission may be a PUSCH transmission. The UE may transmit or receive one of the second downlink transmission and the second uplink transmission, and may not transmit or receive the other one.

Whether to overlap may be determined in units of symbols. Alternatively, whether to overlap may be determined in units of slots. In this case, when both uplink transmission and downlink transmission are allocated in the same slot, even if uplink transmission and downlink transmission do not overlap in the same symbol, the terminal can perform any one transmission or at least one of each transmission by the above-described method. can do some

"Criterion and/or rule for selecting any one transmission from among uplink transmission and downlink transmission in which the terminal overlaps" and/or "higher priority to any transmission among uplink transmission and downlink transmission in which the terminal overlaps" Ranking criteria and/or rules" may be predefined in technical specifications. Alternatively, the terminal may select one transmission based on signaling from the base station or give a higher priority to one transmission.

The priority decision rule between uplink transmission and downlink transmission applied to the full-duplex section may be the same as the priority decision rule between uplink transmission and downlink transmission applied to the flexible section (or flexible symbol(s)). Alternatively, the priority decision rule between uplink transmission and downlink transmission applied to the full-duplex interval is applied when the terminal does not receive slot format setting (eg, semi-static slot format setting by RRC signaling) information from the base station. It may be the same as the priority decision rule between uplink transmission and downlink transmission.

Although single-carrier operation is mainly considered in the embodiments, the above-described method may be equally or similarly applied even when a terminal transmits a signal using a plurality of carriers (or a plurality of bandwidth parts). For example, the first carrier and the second carrier may be configured in the terminal. The terminal may receive configuration information of a resource region for full-duplex communication in carriers based on the above-described method. For example, a downlink region and an uplink region may be set in a first carrier (or a subband set in the first carrier) and a second carrier (or a subband set in the second carrier) in a certain time interval, respectively. , and the downlink region and the uplink region may overlap in time. At this time, the above-described section may be regarded as a full-duplex section. The terminal may perform transmission and reception operations based on the above-described method in the full-duplex interval.

The methods according to the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded on a computer readable medium. Computer readable media may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on a computer readable medium may be specially designed and configured for the present invention or may be known and usable to those skilled in computer software.

Examples of computer readable media include hardware devices specially configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include high-level language codes that can be executed by a computer using an interpreter or the like as well as machine language codes generated by a compiler. The hardware device described above may be configured to operate with at least one software module to perform the operations of the present invention, and vice versa.

Although described with reference to the above embodiments, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the present invention described in the claims below. You will be able to.

Claims (20)

As a terminal method,
Receiving configuration information of a guard band set within a carrier bandwidth from a base station;
determining a first transmission direction of a first subband set in an upper frequency domain based on the guard band within the carrier bandwidth;
determining a second transmission direction of a second subband set in a lower frequency domain based on the guard band within the carrier bandwidth;
determining a third transmission direction of the guard band based on the first transmission direction and the second transmission direction; and
and performing communication with the base station according to the third transmission direction in the guard band. The method of claim 1,
The first transmission direction, the second transmission direction, and the third transmission direction are downlink, uplink, or flexible, respectively, and the first transmission direction, the second transmission direction, and the third transmission direction direction is applied to the same time interval, and the guard band is regarded as a transmission resource used for the communication based on the first transmission direction and the second transmission direction. The method of claim 1,
When both the first transmission direction and the second transmission direction are downlink, the third transmission direction is determined as the downlink, and the communication is downlink communication. The method of claim 1,
When both the first transmission direction and the second transmission direction are uplink, the third transmission direction is determined as the uplink, and the communication is uplink communication. The method of claim 1,
When the first transmission direction is flexible, the third transmission direction is determined to be the same as the second transmission direction, and the communication with the same transmission direction is performed in the second subband and the guard band. . The method of claim 1,
The first transmission direction and the second transmission direction are determined based on information included in the message received from the base station, the method of the terminal. The method of claim 1,
wherein each of the guard band, the first subband, and the second subband includes one or more contiguous resource blocks (RBs). The method of claim 1,
The first transmission direction, the second transmission direction, and the third transmission direction are applied to a first time interval, and a fourth transmission direction of the first subband in a second time interval different from the first time interval. A fifth transmission direction of the second subband is set, and in the second time interval, the guard band is regarded as an unused resource for the communication based on the fourth transmission direction and the fifth transmission direction. terminal method. The method of claim 8,
The fourth transmission direction is uplink, and the fifth transmission direction is downlink. The method of claim 8,
The fourth transmission direction is flexible, and the fifth transmission direction is one of downlink and uplink. As a base station method,
Transmitting configuration information of a guard band set within a carrier bandwidth to a terminal;
determining a first transmission direction of a first subband set in an upper frequency domain based on the guard band within the carrier bandwidth;
determining a second transmission direction of a second subband set in a lower frequency domain based on the guard band within the carrier bandwidth;
determining a third transmission direction of the guard band based on the first transmission direction and the second transmission direction; and
and performing communication with the terminal according to the third transmission direction in the guard band. The method of claim 11,
The first transmission direction, the second transmission direction, and the third transmission direction are downlink, uplink, or flexible, respectively, and the first transmission direction, the second transmission direction, and the third transmission direction direction is applied to the same time interval, and the guard band is regarded as a transmission resource used for the communication based on the first transmission direction and the second transmission direction. The method of claim 11,
When both the first transmission direction and the second transmission direction are downlink, the third transmission direction is determined as the downlink, and the communication is downlink communication. The method of claim 11,
When both the first transmission direction and the second transmission direction are uplink, the third transmission direction is determined as the uplink, and the communication is uplink communication. The method of claim 11,
When the first transmission direction is flexible, the third transmission direction is determined to be the same as the second transmission direction, and the communication having the same transmission direction in the second subband and the guard band is performed. . The method of claim 11,
The method of the base station,
Transmitting a message including information for determining the first transmission direction and the second transmission direction to the terminal;
Wherein the first transmission direction and the second transmission direction are determined based on the information included in the message. The method of claim 11,
wherein each of the guard band, the first subband, and the second subband includes one or more contiguous resource blocks (RBs). The method of claim 11,
The first transmission direction, the second transmission direction, and the third transmission direction are applied to a first time interval, and a fourth transmission direction of the first subband in a second time interval different from the first time interval. A fifth transmission direction of the second subband is set, and in the second time interval, the guard band is regarded as an unused resource for the communication based on the fourth transmission direction and the fifth transmission direction. base station method. The method of claim 18
The fourth transmission direction is uplink, and the fifth transmission direction is downlink. The method of claim 18
The fourth transmission direction is flexible, and the fifth transmission direction is one of downlink and uplink.

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