Method and apparatus for SRS transmission in communication system supporting sbfd

Abstract

The method of a user equipment (UE) comprises the steps of: determining a transmission power for a sounding reference signal (SRS) transmission on the basis of a power parameter for an uplink transmission performed prior to the SRS transmission; and performing the SRS transmission by using the transmission power, wherein symbol types associated with the SRS transmission and the uplink transmission are the same, and the symbol types are non-subband full duplex (N-SBFD) symbols or SBFD symbols.

Description

Method and device for SRS transmission in a communication system supporting SBFD

[0001] The present disclosure relates to an improved communication technology, and more specifically, to a technology for transmitting a sounding reference signal (SRS) in a communication system that supports subband full duplex (SBFD).

[0002] Communication networks (e.g., 5G communication networks, 6G communication networks, etc.) are being developed to provide communication services that are improved over existing communication networks (e.g., LTE (long term evolution), LTE-A (advanced), etc.). 5G communication networks (e.g., NR (new radio) communication networks) can support frequency bands above 6 GHz as well as frequency bands below 6 GHz. That is, 5G communication networks can support the FR1 band and / or FR2 band. 5G communication networks can support a wider variety of communication services and scenarios compared to LTE communication networks. For example, usage scenarios for 5G communication networks may include eMBB (enhanced Mobile BroadBand), URLLC (Ultra Reliable Low Latency Communication), mMTC (massive Machine Type Communication), etc.

[0003] 6G communication networks can support a wider variety of communication services and scenarios compared to 5G communication networks. 6G communication networks can meet the requirements for ultra-high performance, ultra-bandwidth, ultra-spatial, ultra-precision, ultra-intelligence, and / or ultra-reliability. 6G communication networks can support a wide range of frequency bands and can be applied to various usage scenarios (e.g., terrestrial communication, non-terrestrial communication, sidelink communication, etc.).

[0004] Meanwhile, the communication network may support SBFD (subband full duplex) operation. In a communication network that supports SBFD operation, the terminal may perform SRS (sounding reference signal) transmission. SRS resources for SRS transmission may be configured on N(non)-SBFD symbols or SBFD symbols. Methods for configuring SRS transmission on N-SBFD symbols or SBFD symbols may be required.

[0005] The purpose of the present disclosure to solve the above-mentioned problems is to provide a method and apparatus for transmitting a sounding reference signal (SRS) in a communication system that supports subband full duplex (SBFD).

[0006] A method of a UE (user equipment) according to embodiments of the present disclosure for achieving the above objective comprises: a step of determining a transmission power for an SRS (sounding reference signal) transmission based on power parameters for an uplink transmission performed prior to the transmission of the SRS; and a step of performing the SRS transmission using the transmission power, wherein the symbol type associated with the SRS transmission and the uplink transmission is the same, and the symbol type is an N(non)-SBFD (subband full duplex) symbol or an SBFD symbol.

[0007] Based on the fact that the above SRS transmission is established at the above N-SBFD symbol and another uplink transmission is associated with the above SBFD symbol immediately before the above SRS transmission, the above uplink transmission may be the most recent uplink transmission associated with the above N-SBFD symbol among the uplink transmissions prior to the above other uplink transmission.

[0008] Based on the fact that the above SRS transmission is established at the above SBFD symbol and another uplink transmission is associated with the above N-SBFD symbol immediately before the above SRS transmission, the above uplink transmission may be the most recent uplink transmission associated with the above SBFD symbol among the uplink transmissions prior to the above other uplink transmission.

[0009] The method of the above UE may further include the step of receiving downlink control information (DCI) from a base station, which includes information requesting the SRS transmission and a transmission power control (TPC) command for the symbol type associated with the SRS transmission, and the transmission power may be determined further based on the TPC command.

[0010] The above uplink transmission may be another SRS transmission prior to the above SRS transmission, rather than a PUSCH (physical uplink shared channel) transmission.

[0011] The above power parameter may be a power control adjustment state among a plurality of parameters used to determine the transmission power.

[0012] The method of the UE may further include the step of receiving a first SRS resource set setting for the N-SBFD symbol and a second SRS resource set setting for the SBFD symbol from a base station, and the SRS transmission in the N-SBFD symbol may be based on the first SRS resource set setting and the SRS transmission in the SBFD symbol may be based on the second SRS resource set setting.

[0013] The method of the UE may further include the step of receiving from a base station one SRS resource set setting including a first SRS resource setting for the N-SBFD symbol and a second SRS resource setting for the SBFD symbol, wherein the SRS transmission in the N-SBFD symbol may be based on the first SRS resource setting and the SRS transmission in the SBFD symbol may be based on the second SRS resource setting.

[0014] The above method of the UE may further include the step of receiving from a base station an offset indicating the location of SRS resources for the SRS transmission in the time domain, and the offset may start from the start symbol or end symbol of the UL (uplink) subband.

[0015] Based on the fact that the above SRS transmission is associated with the above SBFD symbol and a transmission comb indicating SRS resources for the above SRS transmission in the frequency domain is indicated to the UE, the above SRS transmission may be performed using one or more SRS resources belonging to the UL subband among the SRS resources indicated by the transmission comb, and the above SRS transmission may not be performed on at least one SRS resource that does not belong to the UL subband among the SRS resources indicated by the transmission comb.

[0016] User equipment (UE) according to embodiments of the present disclosure for achieving the above objective comprises at least one processor, wherein the at least one processor determines a transmit power for an uplink transmission performed prior to a sounding reference signal (SRS) transmission based on power parameters for the uplink transmission performed prior to the SRS transmission; and causes the SRS transmission to be performed using the transmit power, wherein the symbol type associated with the SRS transmission and the uplink transmission is the same, and the symbol type is an N(non)-SBFD (subband full duplex) symbol or an SBFD symbol.

[0017] Based on the fact that the above SRS transmission is established at the above N-SBFD symbol and another uplink transmission is associated with the above SBFD symbol immediately before the above SRS transmission, the above uplink transmission may be the most recent uplink transmission associated with the above N-SBFD symbol among the uplink transmissions prior to the above other uplink transmission.

[0018] Based on the fact that the above SRS transmission is established at the above SBFD symbol and another uplink transmission is associated with the above N-SBFD symbol immediately before the above SRS transmission, the above uplink transmission may be the most recent uplink transmission associated with the above SBFD symbol among the uplink transmissions prior to the above other uplink transmission.

[0019] The above at least one processor may further cause the UE to receive downlink control information (DCI) from a base station, which includes information requesting the SRS transmission and a transmission power control (TPC) command for the symbol type associated with the SRS transmission, and the transmission power may be determined further based on the TPC command.

[0020] The above uplink transmission may be another SRS transmission prior to the above SRS transmission, rather than a PUSCH (physical uplink shared channel) transmission.

[0021] The above power parameter may be a power control adjustment state among a plurality of parameters used to determine the transmission power.

[0022] The above at least one processor may further cause the UE to receive a first SRS resource set setting for the N-SBFD symbol and a second SRS resource set setting for the SBFD symbol from a base station, and the SRS transmission in the N-SBFD symbol may be based on the first SRS resource set setting and the SRS transmission in the SBFD symbol may be based on the second SRS resource set setting.

[0023] The at least one processor may further cause the UE to receive from a base station one SRS resource set configuration including a first SRS resource configuration for the N-SBFD symbol and a second SRS resource configuration for the SBFD symbol, and the SRS transmission in the N-SBFD symbol may be based on the first SRS resource configuration and the SRS transmission in the SBFD symbol may be based on the second SRS resource configuration.

[0024] The above at least one processor may further cause the UE to receive from the base station an offset indicating the location of SRS resources for the SRS transmission in the time domain, and the offset may start from the start symbol or end symbol of the UL (uplink) subband.

[0025] Based on the fact that the above SRS transmission is associated with the above SBFD symbol and a transmission comb indicating SRS resources for the above SRS transmission in the frequency domain is indicated to the UE, the above SRS transmission may be performed using one or more SRS resources belonging to the UL subband among the SRS resources indicated by the transmission comb, and the above SRS transmission may not be performed on at least one SRS resource that does not belong to the UL subband among the SRS resources indicated by the transmission comb.

[0026] According to the present disclosure, a base station may transmit to a terminal via signaling a sounding reference signal (SRS) resource set configuration and / or SRS resource configuration for N(non)-SBFD (subband full duplex) symbols and an SRS resource set configuration and / or SRS resource configuration for SBFD symbols. The terminal may perform SRS transmission in N-SBFD symbols based on the SRS resource set configuration and / or SRS resource configuration for N-SBFD symbols. The terminal may perform SRS transmission in SBFD symbols based on the SRS resource set configuration and / or SRS resource configuration for SBFD symbols. Based on the above operations, in a communication system supporting SBFD, SRS transmission may be performed per symbol type, and no issues regarding SRS transmission in N-SBFD symbols and SBFD symbols may occur. In other words, SRS transmission may be performed efficiently, and the performance of the communication system may be improved.

[0027] FIG. 1 is a conceptual diagram illustrating embodiments of a communication system.

[0028] FIG. 2 is a block diagram illustrating embodiments of communication nodes constituting a communication system.

[0029] FIG. 3 is a block diagram illustrating embodiments of communication nodes performing communication.

[0030] FIG. 4a is a block diagram illustrating embodiments of a transmission path.

[0031] FIG. 4b is a block diagram illustrating embodiments of a receiving path.

[0032] FIG. 5 is a conceptual diagram illustrating embodiments of a system frame in a communication system.

[0033] FIG. 6 is a conceptual diagram illustrating embodiments of subframes in a communication system.

[0034] FIG. 7 is a conceptual diagram illustrating embodiments of slots in a communication system.

[0035] FIG. 8 is a conceptual diagram illustrating embodiments of time-frequency resources in a communication system.

[0036] FIG. 9 is a conceptual diagram illustrating an example of SRS resource configuration in a communication system supporting SBFD.

[0037] FIGS. 10a and FIGS. 10b are conceptual diagrams illustrating embodiments of the movement of SRS resources in the time domain.

[0038] FIG. 11 is a conceptual diagram illustrating embodiments of the period of SRS transmission in SBFD symbols.

[0039] FIG. 12 is a conceptual diagram illustrating embodiments of the configuration of SRS resources in SBFD symbols.

[0040] FIG. 13 is a conceptual diagram illustrating embodiments of SRS transmission in a slot where a UL subband exists.

[0041] FIGS. 14a and FIGS. 14b are conceptual diagrams illustrating embodiments for reinterpreting SRS resources in a slot where a UL subband is set.

[0042] FIG. 15 is a conceptual diagram illustrating embodiments of SRS resource set configuration and SRS resource configuration.

[0043] The present disclosure is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail. However, this is not intended to limit the present disclosure to specific embodiments and should be understood to include all modifications, equivalents, and substitutions that fall within the spirit and scope of the present disclosure.

[0044] Terms such as "first," "second," etc., may be used to describe various components, but said components should not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present disclosure, the first component may be named the second component, and similarly, the second component may be named the first component. The term "and / or" may mean a combination of a plurality of related described items or any of a plurality of related described items.

[0045] In the present disclosure, "at least one of A and B" may mean "at least one of A or B" or "at least one of one or more combinations of A and B". Additionally, in the present disclosure, "at least one of A and B" may mean "at least one of A or B" or "at least one of one or more combinations of A and B".

[0046] In the present disclosure, (re)transmission may mean "transmission," "retransmission," or "transmission and retransmission"; (re)setting may mean "setting," "resetting," or "setting and resetting"; (re)connection may mean "connection," "reconnection," or "connection and reconnection"; and (re)connection may mean "connection," "reconnection," or "connection and reconnection".

[0047] When it is stated that one component is "connected" or "connected" to another component, it should be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it should be understood that there are no other components in between.

[0048] The terms used in this disclosure are used merely to describe specific embodiments and are not intended to limit this disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this disclosure, terms such as “comprising” or “having” are intended to specify the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0049] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which this disclosure pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this disclosure.

[0050] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the attached drawings. To facilitate overall understanding in describing the present disclosure, the same reference numerals are used for identical components in the drawings, and redundant descriptions of identical components are omitted. Operations according to combinations of embodiments, extensions of embodiments, and / or modifications of embodiments may be performed, as well as the embodiments explicitly described in the present disclosure. The performance of some operations may be omitted, and the order of operations may be changed.

[0051] In the embodiments, even when a method performed at a first communication node among the communication nodes (e.g., transmission or reception of a signal) is described, the corresponding second communication node may perform a method corresponding to the method performed at the first communication node (e.g., reception or transmission of a signal). That is, when the operation of a UE (user equipment) is described, the corresponding base station may perform an operation corresponding to the operation of the UE. Conversely, when the operation of a base station is described, the corresponding UE may perform an operation corresponding to the operation of the base station.

[0052] A base station may be referred to as Node B, evolved Node B, gNode B (next generation node B), gNB, device, apparatus, node, communication node, BTS (base transceiver station), RRH (radio remote head), TRP (transmission reception point), RU (radio unit), RSU (road side unit), radio transceiver, access point, access node, etc. A UE may be referred to as terminal, device, apparatus, node, communication node, end node, access terminal, mobile terminal, station, subscriber station, mobile station, portable subscriber station, OBU (on-broad unit), etc.

[0053] In the present disclosure, signaling may be at least one of upper-layer signaling, MAC (medium access control) signaling, or PHY (physical) signaling. A message used for upper-layer signaling may be referred to as an "upper-layer message" or an "upper-layer signaling message." A message used for MAC signaling may be referred to as a "MAC message" or a "MAC signaling message." A message used for PHY signaling may be referred to as a "PHY message" or a "PHY signaling message." Upper-layer signaling may refer to the transmission and reception operations of system information (e.g., MIB (master information block), SIB (system information block)) and / or RRC (radio resource control) messages. MAC signaling may refer to the transmission and reception operations of MAC CE (control element). PHY signaling may refer to the transmission and reception operations of control information (e.g., DCI (downlink control information), UCI (uplink control information), SCI (sidelink control information)).

[0054] In the present disclosure, "setting an operation (e.g., a transmission operation)" may mean that "setting information for said operation (e.g., an information element, a parameter)" and / or "information directing the performance of said operation" is signaled. "Setting an information element (e.g., a parameter)" may mean that said information element is signaled. In the present disclosure, "signal and / or channel" may mean a signal, a channel, or "signal and channel," and "signal" may be used to mean "signal and / or channel." In the present disclosure, "time" and "time point" may be used interchangeably. "Time" may be interpreted as a time or a time point depending on the context, and "time point" may be interpreted as a time point or a time depending on the context.

[0055] In the present disclosure, a phrase containing "~ case (e.g., when ~)" may be expressed as a phrase containing "~ based on (e.g., based on ~)" or a phrase containing "~ in response to (e.g., in response to ~)". In other words, a phrase containing "~ case" may be interpreted as identical or similar to a phrase containing "~ based on" or a phrase containing "~ in response to".

[0056] The communication networks to which the embodiments are applied are not limited to those described below, and the embodiments may be applied to various communication networks (e.g., 4G communication networks, 5G communication networks, and / or 6G communication networks). Here, the term "communication network" may be used interchangeably with "communication system."

[0057] FIG. 1 is a conceptual diagram illustrating embodiments of a communication system.

[0058] Referring to FIG. 1, the communication system (100) may include 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). Additionally, the communication system (100) may further include a core network (e.g., an S-GW (serving-gateway), a P-GW (PDN (packet data network)-gateway), and an MME (mobility management entity)). If the communication system (100) is a 5G communication system (e.g., a new radio (NR) system), the core network may include an AMF (access and mobility management function), a UPF (user plane function), an SMF (session management function), etc.

[0059] Multiple communication nodes (110 to 130) can support communication protocols defined in 3GPP (3rd generation partnership project) standards (e.g., LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.). Multiple communication nodes (110 to 130) can support 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. Each of the multiple communication nodes may have the following structure.

[0060] FIG. 2 is a block diagram illustrating embodiments of communication nodes constituting a communication system.

[0061] Referring to FIG. 2, the communication node (200) may include at least one processor (210), a memory (220), and a transceiver (230) that is connected to a network to perform communication. Additionally, the communication node (200) may further include an input interface device (240), an output interface device (250), a storage device (260), etc. Each component included in the communication node (200) may be connected by a bus (270) to communicate with one another.

[0062] The processor (210) can execute a program command stored in at least one of the memory (220) and the storage device (260). The processor (210) may mean a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor on which the methods according to embodiments of the present disclosure are performed. Each of the memory (220) and the storage device (260) may be composed of at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory (220) may be composed of at least one of read-only memory (ROM) and random access memory (RAM).

[0063] Referring again to FIG. 1, the communication system (100) may include a plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) and 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 be located within 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 be located within 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 be located within the cell coverage of the third base station (110-3). The first terminal (130-1) may be located within the cell coverage of the fourth base station (120-1). The sixth terminal (130-6) may be located within the cell coverage of the fifth base station (120-2).

[0064] Here, each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be referred to as NB (NodeB), eNB (evolved NodeB), gNB, ABS (advanced base station), HR-BS (high reliability-base station), BTS (base transceiver station), radio base station, radio transceiver, access point, access node, RAS (radio access station), 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), RSU (road side unit), RRH (radio remote head), TP (transmission point), TRP (transmission and reception point), etc.

[0065] Each of the multiple terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) may be referred to as UE (user equipment), TE (terminal equipment), AMS (advanced mobile station), HR-MS (high reliability-mobile station), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, portable subscriber station, node, device, OBU (on board unit), etc.

[0066] Meanwhile, each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) may operate in different frequency bands or in the same frequency band. Each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be connected to each other via an ideal backhaul link or a non-ideal backhaul link, and may exchange information with each other via an ideal backhaul link or a non-ideal backhaul link. Each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be connected to a core network via an ideal backhaul link or a non-ideal backhaul link. Each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) can transmit a signal received from the core network to the corresponding terminal (130-1, 130-2, 130-3, 130-4, 130-5, 130-6), and can transmit a signal received from the corresponding terminal (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) to the core network.

[0067] In addition, each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) can support MIMO transmission (e.g., SU (single user)-MIMO, MU (multi user)-MIMO, massive MIMO, etc.), CoMP (coordinated multipoint) transmission, carrier aggregation (CA) transmission, transmission in an unlicensed band, sidelink communication (e.g., D2D (device to device communication), ProSe (proximity services)), IoT (Internet of Things) communication, dual connectivity (DC), etc. Here, each of the plurality of terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) can perform an operation corresponding to the base station (110-1, 110-2, 110-3, 120-1, 120-2) and an operation supported by the base station (110-1, 110-2, 110-3, 120-1, 120-2). For example, the second base station (110-2) can transmit a signal to the fourth terminal (130-4) based on the SU-MIMO method, and the fourth terminal (130-4) can receive a signal from the second base station (110-2) based on the SU-MIMO method. Alternatively, the second base station (110-2) can transmit a signal to the fourth terminal (130-4) and the fifth terminal (130-5) based on the MU-MIMO method, and each of the fourth terminal (130-4) and the fifth terminal (130-5) can receive a signal from the second base station (110-2) by the MU-MIMO method.

[0068] Each of the first base station (110-1), the second base station (110-2), and the third base station (110-3) can transmit a signal to the fourth terminal (130-4) based on the CoMP method, and the fourth terminal (130-4) can receive a signal from the first base station (110-1), the second base station (110-2), and the third base station (110-3) by the CoMP method. Each of the multiple base stations (110-1, 110-2, 110-3, 120-1, 120-2) can transmit and receive signals based on the CA method with terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) within its cell coverage area. Each of the first base station (110-1), the second base station (110-2), and the third base station (110-3) can control sidelink communication 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) can perform sidelink communication by controlling each of the second base station (110-2) and the third base station (110-3).

[0069] Meanwhile, communication nodes performing communication in a communication network may be configured as follows. The communication node shown in FIG. 3 may be a specific embodiment of the communication node shown in FIG. 2.

[0070] FIG. 3 is a block diagram illustrating embodiments of communication nodes performing communication.

[0071] Referring to FIG. 3, the first communication node (300a) and the second communication node (300b) may each be a base station or a UE. The first communication node (300a) may transmit a signal to the second communication node (300b). A transmission processor (311) included in the first communication node (300a) may receive data (e.g., a data unit) from a data source (310). The transmission processor (311) may receive control information from a controller (316). The control information may include at least one of system information, RRC setting information (e.g., information set by RRC signaling), MAC control information (e.g., MAC CE), or PHY control information (e.g., DCI, SCI).

[0072] The transmitting processor (311) can generate data symbol(s) by performing processing operations on data (e.g., encoding operations, symbol mapping operations, etc.). The transmitting processor (311) can generate control symbol(s) by performing processing operations on control information (e.g., encoding operations, symbol mapping operations, etc.). Additionally, the transmitting processor (311) can generate synchronization / reference symbol(s) for synchronization signals and / or reference signals.

[0073] The Tx MIMO processor (312) can perform spatial processing operations (e.g., precoding operations) on data symbol(s), control symbol(s), and / or synchronization / reference symbol(s). The output of the Tx MIMO processor (312) (e.g., a symbol stream) can be provided to modulators (MODs) included in transceivers (313a to 313t). The modulators (MODs) can perform processing operations on the symbol stream to generate modulated symbols and perform additional processing operations on the modulated symbols (e.g., analog conversion operations, amplification operations, filtering operations, up-conversion operations) to generate signals. The signals generated by the modulators (MODs) of the transceivers (313a to 313t) can be transmitted through antennas (314a to 314t).

[0074] Signals transmitted by the first communication node (300a) can be received at the antennas (364a to 364r) of the second communication node (300b). Signals received at the antennas (364a to 364r) can be provided to demodulators (DEMODs) included in the transceivers (363a to 363r). The demodulators (DEMODs) can obtain samples by performing processing operations on the signals (e.g., filtering, amplification, down-conversion, digital conversion). The demodulators (DEMODs) can obtain symbols by performing additional processing operations on the samples. The MIMO detector (362) can perform MIMO detection operations on the symbols. The receiving processor (361) can perform processing operations on the symbols (e.g., deinterleaving, decoding). The output of the receiving processor (361) can be provided to the data sink (360) and the controller (366). For example, data can be provided to the data sink (360), and control information can be provided to the controller (366).

[0075] Meanwhile, the second communication node (300b) can transmit a signal to the first communication node (300a). The transmission processor (368) included in the second communication node (300b) can receive data (e.g., a data unit) from the data source (367) and can generate data symbol(s) by performing a processing operation on the data. The transmission processor (368) can receive control information from the controller (366) and can generate control symbol(s) by performing a processing operation on the control information. Additionally, the transmission processor (368) can generate reference symbol(s) by performing a processing operation on a reference signal.

[0076] The Tx MIMO processor (369) can perform spatial processing operations (e.g., precoding operations) on data symbol(s), control symbol(s), and / or reference symbol(s). The output of the Tx MIMO processor (369) (e.g., a symbol stream) can be provided to modulators (MODs) included in transceivers (363a to 363t). The modulators (MODs) can perform processing operations on the symbol stream to generate modulated symbols and perform additional processing operations on the modulated symbols (e.g., analog conversion operations, amplification operations, filtering operations, up-conversion operations) to generate signals. The signals generated by the modulators (MODs) of the transceivers (363a to 363t) can be transmitted through antennas (364a to 364t).

[0077] Signals transmitted by the second communication node (300b) can be received at the antennas (314a to 314r) of the first communication node (300a). Signals received at the antennas (314a to 314r) can be provided to demodulators (DEMODs) included in the transceivers (313a to 313r). The demodulators (DEMODs) can obtain samples by performing processing operations on the signals (e.g., filtering operation, amplification operation, down-conversion operation, digital conversion operation). The demodulators (DEMODs) can obtain symbols by performing additional processing operations on the samples. The MIMO detector (320) can perform MIMO detection operations on the symbols. The receiving processor (319) can perform processing operations on the symbols (e.g., deinterleaving operation, decoding operation). The output of the receiving processor (319) can be provided to the data sink (318) and the controller (316). For example, data can be provided to the data sink (318), and control information can be provided to the controller (316).

[0078] The memories (315 and 365) may store data, control information, and / or program code. The scheduler (317) may perform scheduling operations for communication. The processors (311, 312, 319, 361, 368, 369) and controllers (316, 366) shown in FIG. 3 may be the processor (210) shown in FIG. 2 and may be used to perform the methods described in this disclosure.

[0079] FIG. 4a is a block diagram illustrating embodiments of a transmission path, and FIG. 4b is a block diagram illustrating embodiments of a reception path.

[0080] Referring to FIGS. 4a and 4b, a transmission path (410) may be implemented at a communication node that transmits a signal, and a reception path (420) may be implemented at a communication node that receives a signal. The transmission path (410) may include a channel coding and modulation block (411), an S-to-P (serial-to-parallel) block (512), an N IFFT (Inverse Fast Fourier Transform) block (413), a P-to-S (parallel-to-serial) block (414), a CP (cyclic prefix) addition block (415), and an UC (up-converter) (UC) (416). The reception path (420) may include a DC (down-converter) (421), a CP removal block (422), an S-to-P block (423), an N FFT block (424), a P-to-S block (425), and a channel decoding and demodulation block (426). Here, N can be a natural number.

[0081] Information bits in the transmission path (410) can be input to the channel coding and modulation block (411). The channel coding and modulation block (411) can perform coding operations (e.g., LDPC (low-density parity check) (LDPC) coding operations, polar coding operations, etc.) and modulation operations (e.g., QPSK (Quadrature Phase Shift Keying), QAM (Quadrature Amplitude Modulation), etc.) on the information bits. The output of the channel coding and modulation block (411) may be a sequence of modulation symbols.

[0082] The S-to-P block (412) can convert modulated symbols in the frequency domain into parallel symbol streams to generate N parallel symbol streams. N can be the IFFT size or the FFT size. The N IFFT block (413) can generate signals in the time domain by performing an IFFT operation on the N parallel symbol streams. The P-to-S block (414) can convert the output of the N IFFT block (413) (e.g., parallel signals) into a serial signal to generate a serial signal.

[0083] The CP addition block (415) can insert CP into the signal. The UC (416) can up-convert the frequency of the output of the CP addition block (415) to an RF (radio frequency) frequency. Additionally, the output of the CP addition block (415) can be filtered in the baseband before up-conversion.

[0084] A signal transmitted from the transmission path (410) can be input to the reception path (420). The operation in the reception path (420) may be the inverse operation of the operation in the transmission path (410). The DC (421) may down-convert the frequency of the received signal to a baseband frequency. The CP removal block (422) may remove CP from the signal. The output of the CP removal block (422) may be a serial signal. The S-to-P block (423) may convert the serial signal into parallel signals. The N FFT block (424) may generate N parallel signals by performing an FFT algorithm. The P-to-S block (425) may convert the parallel signals into a sequence of modulation symbols. The channel decoding and demodulation block (426) may perform a demodulation operation on the modulation symbols and perform a decoding operation on the result of the demodulation operation to restore the data.

[0085] In FIGS. 4a and 4b, Discrete Fourier Transform (DFT) and Inverse DFT (IDFT) may be used instead of FFT and IFFT. In FIGS. 4a and 4b, each of the blocks (e.g., components) may be implemented by at least one of hardware, software, or firmware. For example, in FIGS. 4a and 4b, some blocks may be implemented by software, and the remaining blocks may be implemented by hardware or a "combination of hardware and software." In FIGS. 4a and 4b, one block may be subdivided into multiple blocks, multiple blocks may be integrated into one block, some blocks may be omitted, and blocks supporting other functions may be added.

[0086] FIG. 5 is a conceptual diagram illustrating embodiments of a system frame in a communication system.

[0087] Referring to FIG. 5, time resources in a communication system can be divided into frames. For example, system frames can be set consecutively in the time domain of the communication system. The length of a system frame can be 10 ms (millisecond). The system frame number (SFN) can be set from #0 to #1023. In this case, 1024 system frames can be repeated in the time domain of the communication system. For example, the SFN of a system frame after system frame #1023 can be #0.

[0088] A single system frame may contain two half frames. The length of a single half frame may be 5ms. A half frame located at the beginning of the system frame may be referred to as "Half Frame #0", and a half frame located at the end of the system frame may be referred to as "Half Frame #1". A system frame may contain 10 subframes. The length of a single subframe may be 1ms. Within a single system frame, the 10 subframes may be referred to as "Subframe #0-9".

[0089] FIG. 6 is a conceptual diagram illustrating embodiments of subframes in a communication system.

[0090] Referring to FIG. 6, one subframe may include n slots, where n is a natural number. Thus, one subframe may consist of one or more slots.

[0091] FIG. 7 is a conceptual diagram illustrating embodiments of slots in a communication system.

[0092] Referring to FIG. 7, a slot may contain one or more symbols. A slot illustrated in FIG. 7 may contain 14 symbols. The length of the slot may vary depending on the number of symbols included in the slot and the length of the symbols. Alternatively, the length of the slot may vary depending on the numerology.

[0093] Numerals applied to physical signals and channels in a communication system may be variable. Numerals may be variable to meet various technical requirements of the communication system. In a communication system where CP (cyclic prefix) based OFDM waveform technology is applied, numerals may include subcarrier spacing and CP length (or CP type). Table 1 may be a first embodiment of a method for configuring numerals for a CP-OFDM based communication system. Depending on the frequency band in which the communication system operates, at least some of the numerals in Table 1 may be supported. Additionally, numerals not listed in Table 1 may be further supported in the communication system.

[0094]

[0095] When the subcarrier spacing is 15 kHz (e.g., μ=0), the slot length may be 1 ms. In this case, one system frame may contain 10 slots. When the subcarrier spacing is 30 kHz (e.g., μ=1), the slot length may be 0.5 ms. In this case, one system frame may contain 20 slots.

[0096] When the subcarrier spacing is 60 kHz (e.g., μ=2), the slot length may be 0.25 ms. In this case, one system frame may contain 40 slots. When the subcarrier spacing is 120 kHz (e.g., μ=3), the slot length may be 0.125 ms. In this case, one system frame may contain 80 slots. When the subcarrier spacing is 240 kHz (e.g., μ=4), the slot length may be 0.0625 ms. In this case, one system frame may contain 160 slots.

[0097] A symbol can be set as a downlink (DL) symbol, a flexible (FL) symbol, or an uplink (UL) symbol. A slot consisting only of a DL symbol may be referred to as a "DL slot," a slot consisting only of an FL symbol may be referred to as a "FL slot," and a slot consisting only of a UL symbol may be referred to as a "UL slot."

[0098] The slot format can be semi-fixed by upper-layer signaling (e.g., RRC signaling). Information indicating the semi-fixed slot format may be included in system information, and the semi-fixed slot format can be set cell-specifically. Additionally, the semi-fixed slot format can be additionally set per terminal through terminal-specific upper-layer signaling (e.g., RRC signaling). The flexible symbols of the cell-specific slot format can be overridden as downlink symbols or uplink symbols by the terminal-specific upper-layer signaling. Furthermore, the slot format can be dynamically indicated by physical layer signaling (e.g., the SFI (slot format indicator) included in the DCI). The semi-fixed slot format can be overridden by the dynamically indicated slot format. For example, the semi-fixed flexible symbols can be overridden as downlink symbols or uplink symbols by the SFI.

[0099] The reference signal may be a CSI-RS (channel state information-reference signal), SRS (sounding reference signal), DM-RS (demodulation-reference signal), PT-RS (phase tracking-reference signal), etc. The channel may be a PBCH (physical broadcast channel), PDCCH (physical downlink control channel), PDSCH (physical downlink shared channel), PUCCH (physical uplink control channel), PUSCH (physical uplink shared channel), PSCCH (physical sidelink control channel), PSSCH (physical sidelink shared channel), etc. In the present disclosure, the control channel may mean PDCCH, PUCCH, or PSCCH, and the data channel may mean PDSCH, PUSCH, or PSSCH.

[0100] FIG. 8 is a conceptual diagram illustrating embodiments of time-frequency resources in a communication system.

[0101] Referring to FIG. 8, a resource consisting of one symbol (e.g., an OFDM symbol) in the time domain and one subcarrier in the frequency domain can be defined as a "RE (resource element)." A resource consisting of one OFDM symbol in the time domain and K subcarriers in the frequency domain can be defined as a "REG (resource element group)." A REG can include K REs. A REG can be used as the basic unit of resource allocation in the frequency domain. K can be a natural number. For example, K can be 12. N can be a natural number. In the slot illustrated in FIG. 7, N can be 14. N OFDM symbols can be used as the basic unit of resource allocation in the time domain.

[0102] In the present disclosure, RB may mean a common RB (CRB). Alternatively, RB may mean a PRB or a virtual RB (VRB). In a communication system, a CRB may mean an RB that constitutes a set of consecutive RBs (e.g., a common RB grid) based on a reference frequency (e.g., point A). A carrier and / or bandwidth portion may be placed on the common RB grid. That is, the carrier and / or bandwidth portion may be composed of CRB(s). An RB or CRB constituting the bandwidth portion may be referred to as a PRB, and within the bandwidth portion, a CRB index may be appropriately converted to a PRB index.

[0103] Downlink data may be transmitted via PDSCH. A base station may transmit configuration information of the PDSCH (e.g., scheduling information) to a terminal via PDCCH. A terminal may obtain the configuration information of the PDSCH by receiving the PDCCH (e.g., downlink control information (DCI)). For example, the configuration information of the PDSCH may include a modulation coding scheme (MCS) used for transmitting and receiving the PDSCH, time resource information of the PDSCH, frequency resource information of the PDSCH, feedback resource information for the PDSCH, etc. PDSCH may refer to a radio resource where downlink data is transmitted and received. Alternatively, PDSCH may refer to the downlink data itself. PDCCH may refer to a radio resource where downlink control information (e.g., DCI) is transmitted and received. Alternatively, PDCCH may refer to the downlink control information itself.

[0104] The terminal may perform a monitoring operation for the PDCCH to receive the PDSCH transmitted from the base station. The base station may notify the terminal of configuration information for the monitoring operation of the PDCCH using a higher-layer message (e.g., a radio resource control (RRC) message). The configuration information for the monitoring operation of the PDCCH may include CORESET (control resource set) information and search space information.

[0105] CORESET information may include PDCCH DMRS (demodulation reference signal) information, PDCCH precoding information, PDCCH occasion information, etc. The PDCCH DMRS may be a DMRS used to demodulate the PDCCH. A PDCCH occasion may be an area where the PDCCH can exist. That is, a PDCCH occasion may be an area where DCI can be transmitted. A PDCCH occasion may be referred to as a PDCCH candidate. PDCCH occasion information may include time resource information and frequency resource information of the PDCCH occasion. In the time domain, the length of the PDCCH occasion may be indicated in symbol units. In the frequency domain, the size of the PDCCH occasion may be indicated in RB units (e.g., PRB (physical resource block) units or CRB (common resource block) units).

[0106] The search space information may include a CORESET ID (identifier) ​​associated with the search space, the period of PDCCH monitoring, and / or an offset. The period and offset of PDCCH monitoring may each be specified in slots. Additionally, the search space information may further include the index of the symbol at which the PDCCH monitoring operation begins.

[0107] A base station may configure a Bandwidth Part (BWP) for downlink communication. BWPs may be configured differently for each terminal. The base station may notify the terminal of the BWP configuration information using upper-layer signaling. Upper-layer signaling may refer to "transmission operations of system information" and / or "transmission operations of Radio Resource Control (RRC) messages." One or more BWPs may be configured for a single terminal. The terminal may receive BWP configuration information from the base station and identify the BWP(s) configured by the base station based on the BWP configuration information. If multiple BWPs are configured for downlink communication, the base station may activate one or more of the multiple BWPs. The base station may transmit the configuration information of the activated BWP(s) to the terminal using at least one of upper-layer signaling, a Medium Access Control (MAC) Control Element (CE), or a DCI. The base station may perform downlink communication using the activated BWP(s). The terminal can identify the activated BWP(s) by receiving configuration information of the activated BWP(s) from the base station, and can perform a downlink reception operation on the activated BWP(s).

[0108] Meanwhile, communication systems (e.g., NR communication systems, 5G communication systems, 6G communication systems) can support usage scenarios such as eMBB (enhanced Mobile BroadBand), URLLC (Ultra Reliable Low Latency Communication), and mMTC (massive Machine Type Communication). Communication systems (e.g., communication networks) can support SBFD (subband full duplex) operation.

[0109] A communication system may support the time division duplexing (TDD) method. In a communication system that supports the TDD method (hereinafter referred to as the "TDD communication system"), DL (downlink) symbol(s) and UL (uplink) symbol(s) may be set in different time resources within a single carrier. DL symbols and UL symbols may be associated with coverage and / or latency. In a TDD communication system, the base station can utilize resources more efficiently than the frequency division duplexing (FDD) method by considering various use cases. Resource scheduling operations of the base station in a TDD communication system may be important. For enhanced TDD operation, SBFD operations (e.g., SBFD method) may be supported. If SBFD operations are supported in a TDD communication system, DL communication (e.g., transmission and reception of DL signals) and UL communication (e.g., transmission and reception of UL signals) may be performed simultaneously within the same time resource. For example, within the same time resource, some subbands may be DL subbands, and other subbands may be UL subbands and / or FL subbands. In this disclosure, the DL signal may be interpreted as a DL signal, a DL channel, or "DL signal and DL channel" depending on the context. In this disclosure, the UL signal may be interpreted as a UL signal, a UL channel, or "UL signal and UL channel" depending on the context.

[0110] Symbols to which SBFD operations are applied may be referred to as SBFD symbols. Symbols to which SBFD operations are not applied may be referred to as N(non)-SBFD symbols. N-SBFD symbols may be DL symbols, UL symbols, or FL symbols. In an SBFD symbol, the terminal can perform DL communication and UL communication. In other words, in an SBFD symbol, the terminal can perform full-duplex operation. The base station may assume that DL communication and UL communication are possible in an SBFD symbol. In an N-SBFD symbol, the terminal can perform one of DL communication and UL communication. In other words, in an N-SBFD symbol, the terminal can perform half-duplex operation. An SBFD symbol may be a symbol that includes a subband to which SBFD operations are performed. The subband for SBFD may be referred to or interpreted as a UL subband. The UL subband can exist (e.g., be configured) within the symbol where the SSB (synchronization signal block) is transmitted.

[0111] Resources for SBFD operation (e.g., time resources and / or frequency resources) may be configured in a semi-static manner. In other words, the configuration for SBFD resources may be a semi-static configuration. "That the SBFD resource configuration is a semi-static configuration" may mean that the SBFD resource is configured by semi-static signaling (e.g., system information, RRC messages). In this disclosure, SBFD resources may refer to time resources and / or frequency resources for SBFD operation. UL subbands for SBFD may be SBFD resources. Alternatively, SBFD resources may be configured in a dynamic manner. "That the SBFD resource configuration is a dynamic configuration" may mean that the SBFD resource is configured by dynamic signaling (e.g., MAC CE, DCI, SCI).

[0112] SBFD resources (e.g., UL subband, SBFD symbol) may be configured within DL resources and / or FL (flexible) resources configured by TDD-UL-DL configuration common information (e.g., TDD-UL-DL-configCommon). In the time domain, the transition point from an N-SBFD symbol to an SBFD symbol may be limited to one. In the time domain, the transition point from an SBFD symbol to an N-SBFD symbol may be limited to one. Regarding the resource configuration of a subband for SBFD, it may be desirable for the terminal to be aware of the resource configuration information of the subband for SBFD in advance.

[0113] TDD-UL-DL configuration common information can be used to configure patterns (e.g., TDD-UL-DL-Pattern) for DL ​​resources and / or UL resources in the time domain of a TDD communication system. Patterns for DL ​​resources and / or UL resources may be referred to as UL / DL patterns. UL / DL patterns may change depending on the environment of the communication system (e.g., TDD communication system). Up to two UL / DL patterns may be configured on a terminal. TDD-UL-DL configuration common information may be cell-specific parameters (e.g., cell-specific configuration information). The base station may change the configuration for symbol(s) (e.g., transmission direction, type) on a terminal-by-terminal basis based on a specific slot within a preset UL / DL pattern. The slot where the symbol configuration (e.g., symbol direction, symbol type) can be changed may be a slot configured as an FL resource by the TDD-UL-DL configuration common information. The symbol direction (e.g., symbol transmission direction) and / or symbol type may be DL, UL, or FL. The RRC signaling used to change the configuration of an FL slot (e.g., FL resource) may be TDD-UL-DL configuration-dedicated information (e.g., TDD-UL-DL-ConfigDedicated). Table 2 may be TDD-UL-DL configuration common information, and Tables 3 and 4 may be TDD-UL-DL configuration-dedicated information.

[0114]

[0115]

[0116]

[0117] The UL / DL pattern, configured by the common information of the TDD-UL-DL configuration, may be repeated according to a specific period (e.g., dl-UL-TransmissionPeriodicity). In the time interval where the UL / DL pattern is applied, the leading portion may be configured as a DL resource. In the time interval where the UL / DL pattern is applied, the trailing portion may be configured as a UL resource. Resources that are not configured as DL or UL resources in the time interval where the UL / DL pattern is applied may be FL resources. The period of the UL / DL pattern may vary depending on the reference numerology. A guard time (e.g., a guard gap) may be required for switching (e.g., transition) from a DL resource (e.g., DL symbol / slot) to a UL resource (e.g., UL symbol / slot). Since the propagation delay of the DL signal causes interference to the UL resource, a guard time may be required for switching from a DL resource to a UL resource. A separate guard time may not be required for switching from UL resources to DL resources. Since UL signals are transmitted based on TAC (timing advance command) directed by the base station, a guard time may not be required for switching from UL resources to DL resources.

[0118] TDD-UL-DL configuration common information (e.g., TDD-UL-DL-ConfigCommon) may be referred to as "TDD Common" or "TDD Common Information". TDD-UL-DL configuration dedicated information (e.g., TDD-UL-DL-ConfigDedicated) may be referred to as "TDD Dedicated" or "TDD Dedicated Information". UL subband may refer to a subband for SBFD. DL symbol(s) and / or DL ​​slot(s) may be referred to as DL area(or DL ​​resource). UL symbol(s) and / or UL slot(s) may be referred to as UL area(or UL resource). FL symbol(s) and / or FL slot(s) may be referred to as FL area(or FL resource). A terminal that supports (e.g. recognizes) SBFD operation may be referred to as an SBFD terminal or SBFD UE. A terminal that does not support (e.g., does not recognize) SBFD operation may be referred to as an N(non)-SBFD terminal or an N-SBFD UE. An N-SBFD terminal may be a legacy terminal (e.g., a legacy UE). In this disclosure, a terminal may be interpreted as an SBFD terminal and / or an N-SBFD terminal depending on the context. Legacy settings (e.g., legacy information, legacy settings information) may be information for an N-SBFD terminal.

[0119] An SBFD resource may be located adjacent to (e.g., contiguously) an N-SBFD resource. An SBFD resource may refer to an SBFD symbol and / or an SBFD slot. An N-SBFD resource may refer to an N-SBFD symbol and / or an N-SBFD slot. In adjacent slots (e.g., contiguous slots), an SBFD symbol and an N-SBFD symbol may exist adjacently. The types of adjacent symbols (e.g., SBFD symbols or N-SBFD symbols) may be the same or different. The operation of the terminal may vary based on the types of adjacent symbols (e.g., the same symbol type or different symbol types).

[0120] A communication system supporting SBFD may support two types of SBFD configurations (e.g., SBFD configuration 1, SBFD configuration 2). SBFD configuration 1 may be referred to as SBFD transmission configuration 1 or SBFD configuration 1 transmission. SBFD configuration 2 may be referred to as SBFD transmission configuration 2 or SBFD configuration 2 transmission. If SBFD configuration 1 is configured on a terminal (e.g., indicated), the terminal may perform communication (e.g., downlink communication and / or uplink communication) using the same symbol type (e.g., SBFD symbol or N-SBFD symbol). If SBFD configuration 2 is configured on a terminal (e.g., indicated), the terminal may perform communication (e.g., downlink communication and / or uplink communication) using different symbol types (e.g., SBFD symbol and N-SBFD symbol). Symbol types may be classified into SBFD symbols and N-SBFD symbols. A symbol type may be interpreted as a symbol (e.g., a resource) having the said symbol type depending on the context. In the present disclosure, uplink communication (e.g., uplink transmission) may include PUCCH transmission (e.g., PUCCH repeated transmission), PUSCH transmission (e.g., PUSCH repeated transmission), and / or UL RS (reference signal) transmission (e.g., SRS transmission).

[0121] Separate SRS settings for SBFD symbols and N-SBFD symbols may be supported, and Option 1 or Option 2 below may be used.

[0122] - Option #1: Separate SRR resource set configurations (SRS-ResourceSetconfigurations) for SBFD and N-SBFD symbols for specific uses may be supported.

[0123] The set of SRS resources configured for SBFD symbols can be applied to SRS transmission occupations of SBFD symbols.

[0124] - For periodic and semi-persistent SRS, SRS transmissions in N-SBFD symbols may be dropped.

[0125] - In the case of an aperiodic SRS with available slot counting, SBFD symbols may be available for SRS transmission.

[0126] - In the case of a non-periodic SRS without available slot counting, it can be expected that the terminal is instructed to transmit the SRS in SBFD symbols.

[0127] The set of SRS resources configured for N-SBFD symbols can be applied to SRS transmission locations of N-SBFD symbols.

[0128] - For periodic SRS and semi-continuous SRS, SRS transmissions in SBFD symbols may be dropped.

[0129] - For non-periodic SRS with available slot counting, N-SBFD symbols may be available for SRS transmission.

[0130] - In the case of a non-periodic SRS that does not have available slot counting, it can be expected that the terminal is instructed to transmit the SRS in N-SBFD symbols.

[0131] - Option #2: Separate configurations for SBFD symbols and N-SBFD symbols within the same SRS resource may be supported.

[0132] At least freqDomainPosition, freqDomainShift, and freqHopping can be set separately.

[0133] Meanwhile, in the present disclosure, a method for configuring an SRS resource in a communication system supporting SBFD, a method for transmitting an SRS from an SRS resource, etc. will be described. Symbol types may be classified into SBFD symbols and N-SBFD symbols. Different symbol types may include SBFD symbols and N-SBFD symbols.

[0134] ● Proposal #1: Method for configuring SRS resource sets

[0135] In N-SBFD symbols, SRS resource set configurations can be distinguished by an SRS resource set ID (e.g., srs-ResourceSetId). An SRS resource set may contain one or more SRS resources. SRS resources belonging to a single SRS resource set may have the same SRS type. SRS types can be classified into periodic SRS, semi-continuous SRS, and non-periodic SRS. The same transmit power (e.g., parameters related to transmit power) and / or the same beam direction (e.g., parameters related to beam direction) may be applied to SRS resources belonging to a single SRS resource set. If the communication system supports SBFD, a method for configuring SRS resource sets and / or SRS resources in SBFD symbols may be required. SRS resource sets and / or SRS resources in SBFD symbols may be configured based on the following method(s).

[0136] ■ Method #1: SRS resource sets for different symbol types can be configured independently. For example, a base station can independently configure an SRS resource set for N-SBFD symbols and an SRS resource set for SBFD symbols on a terminal.

[0137] ■ Method #2: An existing SRS resource set configuration may be maintained, and within the existing SRS resource set configuration, SRS resource configurations may be independent for N-SBFD symbols and SBFD symbols, respectively. For example, an SRS resource configuration may include an SRS resource configuration for N-SBFD symbols and / or an SRS resource configuration for SBFD symbols.

[0138] ■ Method #3: Existing SRS resource set configurations may be maintained, the interpretation of some parameters for N-SBFD symbols and / or SBFD symbols within the existing SRS resource set configurations may be changed, and new parameters for N-SBFD symbols and / or SBFD symbols may be added within the existing SRS resource set configurations. In Method #3, set-level configurations may be changed.

[0139] Based on Method #1, a legacy SRS resource set for N-SBFD symbols (e.g., N-SBFD SRS resource set) and an additional SRS resource set for SBFD symbols (e.g., SBFD SRS resource set) may be configured. The legacy SRS resource set may be referred to as the first SRS resource set, and the additional SRS resource set may be referred to as the second SRS resource set. The types of parameters included in the legacy SRS resource set and the additional SRS resource set may be the same, and the value of each parameter may be configured based on the symbol type. For example, the value of the first parameter included in the legacy SRS resource set may be configured differently from the value of the first parameter included in the additional SRS resource set.

[0140] The base station may transmit a legacy SRS resource set and an additional SRS resource set to the terminal via signaling. The legacy SRS resource set and the additional SRS resource set may be included in the SRS configuration. The SRS configuration may be signaled from the base station to the terminal. The terminal may receive the legacy SRS resource set and the additional SRS resource set via the base station's signaling and may perform SRS transmissions based on the legacy SRS resource set and / or the additional SRS resource set. According to Method #1, the legacy SRS resource set for N-SBFD symbols and the additional SRS resource set for SBFD symbols may be explicitly configured, but the signaling overhead may increase.

[0141] The terminal may select a set of SRS resources (e.g., SRS resources) among the sets of SRS resources (e.g., SRS resources) set by the base station that is associated with a symbol type (e.g., a symbol type on which SRS transmission is performed), and may perform SRS transmission based on the selected set of SRS resources (e.g., SRS resources). The terminal may not expect SRS transmission based on a set of SRS resources (e.g., SRS resources) among the sets of SRS resources (e.g., SRS resources) set by the base station that is not associated with a symbol type (e.g., a symbol type on which SRS transmission is performed).

[0142] Meanwhile, in special circumstances (e.g., situations where repeated SRS transmissions span different symbol types, situations where preset SRS resources span different symbol types, etc.), it can be expected that the terminal performs SRS transmissions on SRS resources having different symbol types. In other words, in the above special circumstances, it may be permitted for the terminal to perform SRS transmissions.

[0143] Based on Method #2, the SRS resource set configuration may be maintained as is, and parameter(s) may be configured by symbol type at the SRS resource level within the existing SRS resource set configuration. Method #2 may be the method according to Proposal #2 described below. Based on Method #3, parameter(s) commonly applied to SRS resources may be additionally defined, and an SRS resource set configuration including said parameter(s) may be signaled to the terminal. The additional parameter(s) included in the SRS resource set configuration may be as follows.

[0144] A parameter indicating whether SRS resource settings are distinguished by symbol type may be additionally included in the SRS resource set settings. Based on the above parameter included in the SRS resource set settings, the terminal can determine whether the SRS resource set settings include SRS resources configured by symbol type.

[0145] In the time domain, parameters (e.g., time shift, time offset) indicating the shift of an SRS resource directed by an SRS resource set setting may be included in the SRS resource set setting and / or the SRS resource setting. In the frequency domain, parameters (e.g., frequency shift, frequency offset) indicating the shift of an SRS resource directed by an SRS resource set setting may be included in the SRS resource set setting and / or the SRS resource setting.

[0146] FIG. 9 is a conceptual diagram illustrating an example of SRS resource configuration in a communication system supporting SBFD.

[0147] Referring to FIG. 9, the UL subband may start at any symbol within the slot and the UL subband may end at any other symbol within the slot. SRS resource(s) may be located at the symbol(s) in the latter part of the slot. If the UL subband is configured in an area where SRS resource(s) indicated by the existing SRS resource configuration (e.g., legacy SRS resource configuration) cannot be located, according to the existing method, SRS resource(s) may not be configured within the UL subband. The area where SRS resource(s) indicated by the existing SRS resource configuration cannot be located is It may be an area containing previous symbols. It can indicate the number of symbols within the slot. can mean an offset from the slot end symbol, and can be a value set within a specific range. The location where the SRS resource(s) are set within the slot It may be limited by. For example, if the start symbol of an SRS resource is located after the end symbol of a UL subband, the SRS resource cannot exist within the UL subband, and SRS transmission may not be performed within the UL subband. The configuration of an SRS resource in the frequency domain may be based on a comb. comb-4 (e.g., K TC If =4) is indicated, SRS resources in the frequency domain can be configured for every four subcarriers. M srs can indicate the region (e.g., bandwidth) where SRS resources are configured in the frequency domain. M srs It can be set in RB units.

[0148] Parameters for shifting SRS resource(s) into the UL subband (e.g., parameters directing shift in the time domain and / or parameters directing shift in the frequency domain) may be included in the SRS resource set configuration (or SRS resource configuration). The above-mentioned parameters may be configured per SRS resource set or per SRS resource. Parameters directing shift in the time domain may direct shift in the symbol unit. Parameters directing shift in the frequency domain may direct shift in the SC (subcarrier) unit or RB unit.

[0149] An SBFD terminal can determine SRS resources in N-SBFD symbols based on a legacy SRS resource set configuration. If SRS resources are configured in N-SBFD symbols or if SRS resources are configured across N-SBFD symbols and SBFD symbols, the SBFD terminal can shift the SRS resources in the time domain and / or frequency domain based on parameters included in the legacy SRS resource set configuration (e.g., shift parameters). According to the above operation, all or some of the SRS resources may belong to the UL subband. The SBFD terminal can perform SRS transmission using the SRS resources belonging to the UL subband.

[0150] A parameter directing the movement of SRS resource(s) in the time domain may be a time offset. The reference time of the time offset may be a start symbol among N-SBFD symbols, a start symbol of SRS resources set in N-SBFD symbols, an end symbol among N-SBFD symbols, or an end symbol of SRS resources set in N-SBFD symbols. Alternatively, the reference time of the time offset may be a start symbol or an end symbol of a UL subband within a slot.

[0151] FIGS. 10a and FIGS. 10b are conceptual diagrams illustrating embodiments of the movement of SRS resources in the time domain.

[0152] Referring to FIG. 10a, the time offset may be two symbols, and the reference time of the time offset may be the end symbol of the UL subband. A terminal (e.g., an SBFD terminal) may identify SRS resources based on legacy SRS resource set configurations (e.g., symbol lengths, offsets, comb settings, repetitions, etc. of SRS resources), and SRS resources based on legacy SRS resource set configurations may be located outside the UL subband. The terminal may shift SRS resources within the UL subband by the time offset. In other words, SRS resources may be shifted from the end symbol of the UL subband to a time offset prior to the time offset. The terminal may perform SRS transmissions on SRS resources belonging to the UL subband. The terminal may expect to perform SRS transmissions on SRS resources belonging to the UL subband (e.g., UL available PRBs) in the frequency domain.

[0153] Referring to FIG. 10b, the time offset may be three symbols, and the reference time of the time offset may be the start symbol of the UL subband. A terminal (e.g., an SBFD terminal) may identify SRS resources based on legacy SRS resource set configurations (e.g., symbol lengths, offsets, comb settings, repetitions, etc. of SRS resources), and SRS resources based on legacy SRS resource set configurations may be located outside the UL subband. The terminal may shift SRS resources within the UL subband by the time offset. In other words, SRS resources may be shifted from the start symbol of the UL subband to after the time offset. The terminal may perform SRS transmission on SRS resources belonging to the UL subband. The terminal may expect to perform SRS transmission on SRS resources belonging to the UL subband (e.g., UL available PRBs) in the frequency domain.

[0154] The method of shifting SRS resources in the frequency domain may be the same or similar as the method of shifting SRS resources in the time domain described above. The parameter indicating the shift of SRS resource(s) in the frequency domain may be a frequency offset. The reference point of the frequency offset may be the lowest subcarrier (or lowest RB) or the highest subcarrier (or highest RB) of the UL available PRBs (e.g., UL subbands). Alternatively, the reference point of the frequency offset may be the lowest subcarrier (or lowest RB) or the highest subcarrier (or highest RB) of the SRS resources.

[0155] Legacy SRS resource set configurations may be maintained as much as possible, and parameters that apply commonly to SRS resources within an SRS resource set (e.g., time offsets and / or frequency offsets for the movement of SRS resources) may be included in the SRS resource set configurations. In other words, parameters that apply commonly to SRS resources may be configured per SRS resource set. A base station may configure SRS resources for SBFD symbols in a terminal using the aforementioned parameters. The aforementioned parameters may include at least one of a time offset for the movement of SRS resources in the time domain, a frequency offset for the movement of SRS resources in the frequency domain, or information related to the signaling structure of SRS resources within an SRS resource set. The information related to the signaling structure of SRS resources within an SRS resource set may be information indicating whether the SRS resource set configuration includes SRS resources configured per symbol type.

[0156] The above-described embodiment may not be limited to Method #3. The above-described embodiment may be applied to Option #1 and / or Option #2. To solve the above-described problem, the base station may set the starting positions of SRS resources by taking into account the location of the UL subband. The terminal may expect that at least one SRS resource overlaps with the UL subband in the time and / or frequency domain.

[0157] ● Proposal #2: An SRS resource set for an SBFD terminal can be configured based on Proposal #1. A base station can transmit the configuration of the SRS resource set for the SBFD terminal to the SBFD terminal via signaling. A single SRS resource set may include multiple SRS resources (e.g., K SRS resources). The value of K may vary depending on the capabilities of the terminal. Proposal #2 can be used in conjunction with the configuration of the SRS resource set based on Proposal #1. In other words, a combination of Proposal #2 and Proposal #1 can be used.

[0158] ■ Method #1: Independent SRS resources may be configured for each of the different symbol types. For example, a base station may configure an SRS resource for N-SBFD symbols and an SRS resource for SBFD symbols in the terminal.

[0159] ■ Method #2: Additional parameter(s) may be defined in addition to existing SRS resource configurations (e.g., legacy SRS resource configurations), and additional parameter(s) may be used for SRS resource configurations in SBFD symbols.

[0160] Based on Method #1, all parameters and / or values ​​of all parameters for existing SRS resource configuration may be configured for SBFD symbols and N-SBFD symbols, respectively. The terminal may report to the base station the maximum number (K) of SRS resources configurable within a single SRS resource set, regardless of the symbol type. Alternatively, the terminal may report to the base station the maximum number (A, B) of SRS resources configurable within a single SRS resource set for each of the different symbol types. The maximum number of SRS resources configurable within the SRS resource set for SBFD symbols may be referred to as A. The maximum number of SRS resources configurable within the SRS resource set for N-SBFD symbols may be referred to as B. K may be the sum of A and B. The terminal may report (K, A, B), (K, A), (K, B), or (A, B) to the base station. The base station may configure the number of SRS resources within a single SRS resource set associated with each symbol type based on the terminal's capabilities.

[0161] Based on Method #2, among the parameters for SRS configuration, reusable (e.g., reinterpretable) parameters (e.g., time offset, frequency offset in Proposal #1) can be used as is as much as possible, minimum parameters required for SRS resource configuration in SBFD symbols can be defined, and the base station can additionally transmit minimum parameters to the terminal.

[0162] ■ Proposal #2-1: SRS resource set information (e.g., SRS resource information) may include periodicity information based on the SRS type.

[0163] A base station may transmit period information for periodic SRS and semi-continuous SRS, respectively, to a terminal via signaling. The period of each periodic SRS and semi-continuous SRS may be set in slot units. Non-periodic SRS transmission may be a one-time transmission. A DCI requesting non-periodic SRS transmission may include an offset for the slot in which the non-periodic SRS transmission is performed. In other words, the DCI may include information requesting non-periodic SRS transmission and an offset for the slot in which the non-periodic SRS transmission is performed. Non-periodic SRS transmission may be performed in a slot after the offset from the slot in which the DCI was received. If resources for SRS transmission are additionally set in the SBFD symbol, the base station may instruct the terminal to provide period information for the SRS transmission based on a method identical or similar to the existing method. Alternatively, the period information of the SRS transmission in the SBFD symbol may not be explicitly indicated to the terminal, and the communication node (e.g., base station and / or terminal) may determine (e.g., calculate) the period of the SRS transmission based on an implicit method.

[0164] FIG. 11 is a conceptual diagram illustrating embodiments of the period of SRS transmission in SBFD symbols.

[0165] Referring to FIG. 11, if the period information for SRS transmission is not indicated in the SBFD symbol and a single TDD UL-DL pattern is indicated, the communication node may determine (e.g., assume) that the period of SRS transmission in the SBFD symbol is equal to the period of the single TDD UL-DL pattern. If the period information for SRS transmission is not indicated in the SBFD symbol and two TDD UL-DL patterns are indicated, the communication node may determine (e.g., assume) that the period of SRS transmission in the SBFD symbol is equal to the sum of the periods of the two TDD UL-DL patterns. Alternatively, the base station may set a multiple of the period of the single TDD UL-DL pattern as the period of SRS transmission associated with the SBFD symbol and transmit said period information of SRS transmission to the terminal. The base station may set a multiple of the sum of the periods of the two TDD UL-DL patterns as the period of SRS transmission associated with the SBFD symbol and transmit said period information of SRS transmission to the terminal.

[0166] ■ Proposal #2-2: In the time domain, SRS resources can be set in SBFD symbols, and SRS transmission can be performed in said SBFD symbols. The start symbol and / or length of the SRS resources set in the SBFD symbols can be set independently in the terminal. In other words, the start symbol and / or length of the SRS resources set in the SBFD symbols can be indicated to the terminal independently of the start symbol and / or length of the SRS resources set in the N-SBFD symbols.

[0167] FIG. 12 is a conceptual diagram illustrating embodiments of the configuration of SRS resources in SBFD symbols.

[0168] Referring to FIG. 12, a start offset indicating the start symbol of an SRS resource can be set in the terminal. The start offset can be set in units of symbols. In case A, the start offset can start from the first symbol of the slot. In other words, the start offset can be an offset between the start symbol of the slot and the start symbol of the SRS resource. In case B, the start offset can start from the first symbol of the UL subband. In other words, the start offset can be an offset between the start symbol of the UL subband and the start symbol of the SRS resource.

[0169] A termination offset indicating the termination symbol of an SRS resource may be set in the terminal. In case C, the termination offset may start from the last symbol of the slot. In other words, the termination offset may be an offset between the termination symbol of the SRS resource and the termination symbol of the slot. In case D, the termination offset may start from the last symbol of the UL subband. In other words, the termination offset may be an offset between the termination symbol of the SRS resource and the termination symbol of the UL subband.

[0170] Unlike the above-described embodiment, separate signaling may not be performed to set SRS resources for SBFD symbols in the time domain, and the communication node may determine SRS resources for SBFD symbols by reinterpreting the SRS resources set in N-SBFD symbols. Parameters for setting SRS resources in the time domain may be set regardless of the symbol type, and the terminal may determine SRS resources in the UL subband by interpreting the parameters differently in the slot where the UL subband exists, and may expect to perform SRS transmission from the SRS resources within the UL subband.

[0171] An SRS resource can be configured on a terminal regardless of the location of a UL subband, and a UL subband may exist within a slot where a certain SRS resource is configured. The said SRS resource may fully overlap or partially overlap with the said UL subband. Alternatively, the said SRS resource may not overlap with the said UL subband. If the SRS resource fully overlaps with the UL subband, the terminal can expect the SRS resource to be allocated by applying existing resource mapping rules in the time domain as they are. If the SRS resource partially overlaps with the UL subband, or if the SRS resource does not overlap with the UL subband, the terminal can perform SRS transmission based on the embodiments illustrated in FIG. 13 below.

[0172] FIG. 13 is a conceptual diagram illustrating embodiments of SRS transmission in a slot where a UL subband exists.

[0173] Referring to FIG. 13, in Case A, the SRS resources may partially overlap with the UL subband, and in Case B, the SRS resources may not overlap with the UL subband. In Case B, part of the SRS resources may be located in the SBFD symbol, but part of the SRS resources may not belong to the UL subband. In Case A, the terminal may expect to perform an SRS transmission. For example, in Case A, the terminal may perform an SRS transmission based on the SRS resource set configuration associated with the SBFD symbol and / or the SRS resource configuration. In Case B, the terminal may not expect to perform an SRS transmission. If certain conditions are satisfied (e.g., when a non-periodic SRS transmission is requested), it may be permitted for the terminal to perform an SRS transmission in Case B. Since non-periodic SRS transmissions are often required in emergency situations, non-periodic SRS transmissions may be permitted in Case B.

[0174] If the SRS resource does not overlap with the UL subband, the terminal may shift the SRS resource in the time and / or frequency domain so that the SRS resource belongs to the UL subband, and may expect SRS transmission from the SRS resource belonging to the UL subband.

[0175] FIGS. 14a and FIGS. 14b are conceptual diagrams illustrating embodiments for reinterpreting SRS resources in a slot where a UL subband is set.

[0176] Referring to FIGS. 14a and 14b, the position of the starting symbol of an SRS resource is determined based on the last symbol of the slot, and if a UL subband exists in the slot where the SRS resource is set, the terminal can move the position of the SRS resource based on the UL subband. In the embodiment of FIG. 14a, the terminal can move the position of the SRS resource based on the last symbol of the UL subband. In the embodiment of FIG. 14b, the terminal can move the position of the SRS resource based on the first symbol of the UL subband.

[0177] The terminal may not expect SRS transmission from SRS resource(s) among the moved SRS resources that do not belong to the UL subband. In other words, the terminal may not expect SRS transmission from SRS resource(s) among the moved SRS resources that do not belong to the DL subband of the SBFD symbol. The terminal may expect SRS transmission from SRS resource(s) among the moved SRS resources that belong to the UL subband. If the duration of the UL subband is shorter than the length of the SRS resource, the terminal may not expect to move the SRS resource into the UL subband. Alternatively, the terminal may circulatingly deploy the SRS resources by performing a modulo operation and perform SRS transmission using said SRS resources.

[0178] In the frequency domain, SRS resources may be configured based on comb settings (e.g., transmission comb, comb offset) instructed by the base station. One or more of the SRS resources configured based on the comb settings may not belong to the UL subband. The terminal may perform SRS transmission on the SRS resource(s) configured based on the comb settings that belong to the UL subband, and the terminal may not perform SRS transmission on the SRS resource(s) configured based on the comb settings that do not belong to the UL subband. Alternatively, if a non-periodic SRS transmission is instructed to the terminal, the terminal may perform SRS transmission on SRS resources located at the duration of the UL subband in the time domain, regardless of whether the SRS resources configured based on the comb settings belong to the UL subband. In other words, the terminal can perform SRS transmission by using both the SRS resource(s) belonging to the UL subband and the SRS resource(s) not belonging to the UL subband among the SRS resources configured based on the COM settings.

[0179] ■ Proposal #2-3: In the procedure for setting SRS resources for SBFD symbols and N-SBFD symbols, the base station can independently set the frequency start point for the SRS resource in the SBFD symbol and the frequency start point for the SRS resource in the N-SBFD symbol to the terminal.

[0180] The size of the frequency band capable of SRS transmission in an SBFD symbol may differ from the size of the frequency band capable of SRS transmission in an N-SBFD symbol. The frequency starting point for an SRS resource in an SBFD symbol may be indicated by an offset in units of RB (resource block) or SC (subcarrier). The reference point for the offset may be the lowest PRB, lowest SC, highest PRB, or highest SC of the UL subband. Alternatively, the reference point for the offset may be CRB (common resource block) #0. The frequency location for an SRS resource in an SBFD symbol may be determined (e.g., calculated) based on the same method regardless of the reference point for the offset.

[0181] Alternatively, the terminal may determine an SRS resource based on an SRS setting as an SRS resource associated with an N-SBFD symbol, and may follow the frequency resource information based on the said SRS setting (e.g., frequency resource setting information) as is. Identical or similar to Proposal #2-2, the terminal may shift SRS resources in the time domain and expect SRS transmission from the SRS resource(s) among the shifted SRS resources that completely overlap with the UL subband. Since the frequency band of the UL subband is narrower than the frequency band required for SRS transmission in an N-SBFD symbol, frequency hopping for SRS transmission in the UL subband may not be required. The terminal may receive frequency hopping parameters through the base station's existing signaling. The terminal may not apply the frequency hopping parameters to the SRS resource set in the SBFD symbol. In other words, for SRS transmission in an SBFD symbol, the terminal may ignore the frequency hopping parameters.

[0182] Alternatively, because the frequency bandwidth size of the UL subband differs from the frequency bandwidth size required for SRS transmission in N-SBFD symbols, the base station may transmit different frequency hopping parameters (e.g., hopping patterns) to the terminal for each symbol type. Parameters associated with existing frequency hopping parameters (e.g., c-SRS, b-SRS, b-hop) may be additionally configured for SRS transmission in SBFD symbols. The values ​​of the additionally configured parameters may be based on values ​​defined in the technical specifications. Since the frequency bandwidth sizes may differ in different symbol types, the base station may configure (e.g., instruct) comb settings (e.g., transmission comb, comb offset, etc.) to the terminal for each symbol type. Comb settings may be included in SRS settings (e.g., SRS resource set settings, SRS resource settings).

[0183] A transmission comb may be designated as comb-2, comb-4, or comb-8. Comb-2 may indicate that an SRS resource is configured for every two subcarriers in the frequency domain. Comb-4 may indicate that an SRS resource is configured for every four subcarriers in the frequency domain. Comb-8 may indicate that an SRS resource is configured for every eight subcarriers in the frequency domain. For example, the comb configuration for an SRS resource in an SBFD symbol may differ from the comb configuration for an SRS resource in an N-SBFD symbol. Comb configurations specific to a symbol type may be included in the SRS configuration, and the base station may transmit the SRS configuration to the terminal via signaling. The SRS configuration may further include SRS resource set configurations, SRS resource configurations, etc. Since the length of SBFD resources in the time domain is different from the length of N-SBFD resources, the repetition setting parameters of SRS resources (e.g., repetition factor) can be set independently on the terminal for each symbol type.

[0184] ● Proposal #3: SRS power control in SBFD symbols can be performed independently of SRS power control in N-SBFD symbols.

[0185] The terminal transmits the SRS power (e.g., based on the following mathematical formula 1) ) can be determined.

[0186]

[0187]

[0188] It can indicate the maximum output power for the carrier (f) of the serving cell (c) in the SRS transmission occupancy (i). is an active UL BWP(b) and SRS resource set ( It can be p0 set for ). It can specify the SRS bandwidth. It can be set in units of RB. is an active UL BWP(b) and SRS resource set ( It can be an alpha (e.g., an alpha value) set for ). This may refer to the path loss determined based on the path loss RS (reference signal). can indicate the RS index. may be a value for the PUSCH power control regulation state (e.g., SRS power control regulation state).

[0189] may vary based on whether a PUSCH transmission occurs prior to an SRS transmission. If a PUSCH transmission is performed prior to an SRS transmission, the terminal [uses] power for the PUSCH transmission (e.g., power parameters, The SRS transmission power can be determined based on ). If PUSCH transmission was not performed prior to SRS transmission, the terminal determines the power for SRS transmission from the previous SRS occupancy (e.g., power parameter, SRS transmission power can be determined based on ) and / or TPC (transmission power control) commands.

[0190] In a situation where a PUSCH transmission is not performed prior to an SRS transmission, the terminal (e.g., an SBFD terminal) controls the power control state for each of the N-SBFD symbol and the SBFD symbol (e.g., ...can independently determine .... If an SRS transmission is indicated in an N-SBFD symbol, and there is no PUSCH transmission prior to the SRS transmission, and an SRS transmission in an SBFD symbol exists immediately before the SRS transmission, the terminal can determine the SRS transmission power in the current N-SBFD symbol (e.g., power control regulation state) based on the power for the SRS transmission associated with the N-SBFD symbol performed prior to the SRS transmission in the SBFD symbol (e.g., power parameter). In other words, even if an SRS transmission in an SBFD symbol is performed immediately before the SRS transmission in the current N-SBFD symbol, the terminal can determine the SRS transmission power in the current N-SBFD symbol based on the power for the SRS transmission associated with the N-SBFD symbol performed prior to the SRS transmission associated with the SBFD symbol, without considering the power for the SRS transmission in the SBFD symbol. Generalizing the above operation, based on the fact that an SRS transmission is established in an N-SBFD symbol and an uplink transmission is associated with an SBFD symbol immediately prior to the SRS transmission, the terminal can determine the SRS transmission power in the N-SBFD symbol based on the power for the latest uplink transmission associated with the N-SBFD symbol among other uplink transmissions prior to the uplink transmission.

[0191] In the case where an SRS transmission is indicated in an SBFD symbol, and there is no PUSCH transmission prior to the SRS transmission, and an SRS transmission in an N-SBFD symbol exists immediately before the SRS transmission, the terminal can determine the SRS transmission power (e.g., power control regulation state) in the current SBFD symbol based on the power for the SRS transmission in the SBFD symbol performed prior to the SRS transmission in the N-SBFD symbol (e.g., power parameter). In other words, even if an SRS transmission in an N-SBFD symbol is performed immediately before the SRS transmission in the current SBFD symbol, the terminal can determine the SRS transmission power in the current SBFD symbol based on the power for the SRS transmission associated with an SBFD symbol performed prior to the SRS transmission associated with the N-SBFD symbol, without considering the power for the SRS transmission in the N-SBFD symbol. Generalizing the above operation, based on the fact that an SRS transmission is established in an SBFD symbol and an uplink transmission is associated with an N-SBFD symbol immediately before the SRS transmission, the terminal can determine the SRS transmission power in the SBFD symbol based on the power for the latest uplink transmission associated with the SBFD symbol among other uplink transmissions prior to the uplink transmission.

[0192] The terminal can independently apply (e.g., manage, determine) power control regulation states to each of the SRS resources (e.g., SRS transmission) configured in the SBFD symbol and the SRS resources (e.g., SRS transmission) configured in the N-SBFD symbol. The above-described operations may be performed to ensure equity between the SBFD terminal and the N-SBFD terminal. The terminal (e.g., the SBFD terminal) may maintain multiple power control regulation states for each symbol type. The DCI may include TPC commands for each symbol type. For example, the DCI may include TPC commands for N-SBFD symbols and TPC commands for SBFD symbols. A DCI requesting an aperiodic SRS transmission may include an offset indicating the slot in which the aperiodic SRS transmission is performed. In other words, the DCI may include information requesting an aperiodic SRS transmission and an offset indicating the slot in which the aperiodic SRS transmission is performed. The above offset may indicate the number of slots from the slot where the DCI is received to the slot where the aperiodic SRS transmission is performed. The above offset may be set on a slot-by-slot basis.

[0193] Existing TPC commands may have a single value regardless of the symbol type. If different power control regulation states are supported for each symbol type, the base station may transmit a DCI to the terminal that includes a TPC command for an SRS resource (e.g., SRS transmission) set in an N-SBFD symbol and a TPC command for an SRS resource (e.g., SRS transmission) set in an SBFD symbol. The terminal may receive the DCI from the base station and verify the TPC command for each symbol type included in the DCI. Based on the TPC command for the SRS resource set in the N-SBFD symbol, the terminal may determine the power for SRS transmission in the N-SBFD symbol and transmit SRS using the determined power. Based on the TPC command for the SRS resource set in the SBFD symbol, the terminal may determine the power for SRS transmission in the SBFD symbol and transmit SRS using the determined power.

[0194] A base station may transmit a MAC CE requesting a semi-continuous SRS transmission to a terminal. The MAC CE may include power parameters per symbol type (e.g., power control parameters). The terminal may receive the MAC CE from the base station, confirm that a semi-continuous SRS transmission is requested based on the MAC CE, determine the power for the semi-continuous SRS transmission based on the power parameters per symbol type included in the MAC CE, and transmit the semi-continuous SRS using the determined power.

[0195] A base station may transmit system information and / or RRC settings to a terminal, including individual power parameters for each symbol type (e.g., individual power control parameters) and / or common power parameters for different symbol types (e.g., common power control parameters). The terminal may receive system information and / or RRC settings from the base station, verify the individual power parameters and / or common power parameters included in the system information and / or RRC settings, and perform SRS transmission using power determined based on the individual power parameters and / or common power parameters.

[0196] In order for the power parameters described above to be applied commonly to SRS resources, the power parameters described above may be set as a unit of a set of SRS resources. For each SRS resource, power parameters per symbol type may be set independently. If there exists another uplink transmission performed in the same symbol type as the symbol type for which an SRS transmission is set within the same slot, the terminal may determine the power for the SRS transmission based on the power (e.g., power parameters) for the other uplink transmission, and may perform the SRS transmission using the determined power.

[0197] If there is no other uplink transmission performed in the same symbol type as the symbol type for which the SRS transmission is set within the same slot, the terminal may refer to the most recent slot prior to the current slot in which the SRS transmission is set. Specifically, the terminal may identify the most recent slot prior to the current slot in which another uplink transmission was performed in the same symbol type as the symbol type for which the SRS transmission is set, and may determine the power for the SRS transmission based on the power (e.g., power parameter) for the other uplink transmission in the most recent slot, and may perform the SRS transmission using the determined power. The aforementioned uplink transmission may be the transmission of any uplink channel and / or signal. Alternatively, the aforementioned uplink transmission may be the transmission of a specific uplink channel and / or signal.

[0198] ● Proposal #4: A base station may transmit an SRS resource set configuration including the target symbol type of an SRS resource and / or an SRS resource configuration to a terminal.

[0199] When an SRS resource set is configured for a specific symbol type among N-SBFD symbols or SBFD symbols, the terminal may determine that the SRS resources belonging to the SRS resource set are configured for the specific symbol type. The SRS resource set configuration may include SRS resource configurations per symbol type. For example, the SRS resource set configuration may include an SRS resource configuration for N-SBFD symbols and an SRS resource configuration for SBFD symbols. The SRS resource configuration for N-SBFD symbols may be referred to as a legacy SRS resource configuration (or a first SRS resource configuration), and the SRS resource configuration for SBFD symbols may be referred to as an additional SRS resource configuration (or a second SRS resource configuration).

[0200] At least one SRS resource setting that is meaningfully interpreted among legacy SRS resource settings or additional SRS resource settings may be determined based on an SRS resource set setting that includes said legacy SRS resource settings and said additional SRS resource settings. A base station may generate an SRS resource set setting that includes information indicating a target symbol type and may transmit said SRS resource set setting to a terminal via signaling. An SRS resource setting associated with a target symbol type (e.g., legacy SRS resource settings or additional SRS resource settings) may be interpreted as a meaningful SRS resource setting. In other words, a terminal may receive an SRS resource set setting via the base station's signaling and may perform SRS transmission based on an SRS resource setting associated with a target symbol type indicated by the information included in said SRS resource set setting.

[0201] FIG. 15 is a conceptual diagram illustrating embodiments of SRS resource set configuration and SRS resource configuration.

[0202] Referring to FIG. 15, SRS resource IDs (identifiers) can be used redundantly in multiple SRS resource set configurations. Target symbol types can be configured per SRS resource set. Since target symbol types are not configured per SRS resource, signaling overhead can be reduced. For example, SRS resource set #n may include SRS resources #1 and #2, SRS resource #1 may include {legacy SRS resource configuration, additional SRS resource configuration}, and SRS resource #2 may include {legacy SRS resource configuration, additional SRS resource configuration}. When a base station indicates the target symbol type for an SRS resource set as an N-SBFD symbol, the terminal can expect SRS transmission based on legacy SRS resource configurations associated with all SRS resource IDs belonging to the SRS resource set. When a base station indicates the target symbol type for an SRS resource set as an SBFD symbol, the terminal can expect SRS transmission based on additional SRS resource settings associated with all SRS resource IDs belonging to the SRS resource set.

[0203] Alternatively, target symbol types can be configured per SRS resource. In other words, target symbol types associated with each SRS resource ID can be configured. In this case, each SRS resource configuration may include information on the target symbol type, legacy SRS resource configurations, and additional legacy SRS resource configurations. Alternatively, each SRS resource configuration may include "information on the target symbol type and legacy SRS resource configurations" or "information on the target symbol type and additional SRS resource configurations." A base station may transmit an SRS resource set configuration containing the SRS resource configurations to a terminal via signaling. A terminal may receive the SRS resource set configuration via the base station's signaling. A unique target symbol type can be configured per SRS resource, and a single SRS resource set may include SRS resources that support different symbol types. When target symbol types are configured per SRS resource, the degrees of freedom may be higher than when target symbol types are configured per SRS resource set. To set the target symbol type for each SRS resource, it may be necessary to obtain many SRS resource IDs.

[0204] An SRS resource set configuration may include an SRS resource configuration and a type tag associated with said SRS resource configuration. The type tag may indicate a target symbol type (e.g., an SBFD symbol or an N-SBFD symbol). A single SRS resource set configuration may include SRS resource configurations having different type tags. When a type tag is used, an SRS resource for one symbol type may be configured for one SRS resource ID. The number of SRS resource IDs required when a type tag is used may be greater than the number of SRS resource IDs required when SRS resources for different symbol types are configured for one SRS resource ID.

[0205] The embodiments proposed in this disclosure may be applied not only to SRS transmission but also to other uplink and / or downlink communications. The proposals of this disclosure may be applied to various scenarios and / or various types. Depending on the conditions, one or multiple proposals may be used.

[0206] In the present disclosure, the UL subband may be a time domain and frequency domain where uplink communication is possible in DL symbol(s) and / or FL symbol(s). The UL available PRBs may be an overlapping area between the UL subband and an active UL BWP. In the present disclosure, the DL subband may be a time domain and frequency domain where downlink communication is possible in DL symbol(s) and / or FL symbol(s). The DL available PRBs may be an overlapping area between the DL subband and a BWP (e.g., an active DL BWP).

[0207] In the present disclosure, a terminal may transmit information to a base station indicating whether it supports the function(s) proposed in the present disclosure. Information indicating whether it supports the function(s) may be included in a UE capability report. A base station may receive a UE capability report from a terminal and perform signaling and / or operations based on the information included in the UE capability information (e.g., information indicating whether it supports the function(s).

[0208] Settings for the UL subband (e.g., SBFD settings) can be transmitted via signaling (e.g., RRC signaling). SBFD settings can be transmitted after the transmission of TDD common settings. The methods proposed in this disclosure can be applied to unlicensed bands as well as licensed bands. The methods proposed in this disclosure can be applied to sidelinks and / or supplementary uplinks (SUL). For example, the methods proposed in this disclosure can be applied to determine transmit power in sidelinks and / or SULs.

[0209] Each of the proposals of the present disclosure may be applied independently. Or a combination of the proposals of the present disclosure may be applied. Some proposals of the present disclosure may be applied to other proposals. Each of the options of the present disclosure may be applied independently. Or a combination of the options of the present disclosure may be applied. Some options of the present disclosure may be applied to other options. The proposals and / or options of the present disclosure may be applied regardless of the RRC state of the terminal. For example, a terminal in an RRC idle state, a terminal in an RRC inactive state, and / or a terminal in an RRC connected state may perform the proposals and / or options of the present disclosure. A base station may perform the proposals and / or options of the present disclosure for a terminal in an RRC idle state, a terminal in an RRC inactive state, and / or a terminal in an RRC connected state.

[0210] The channels / signals to which the proposals of the present disclosure apply may not be limited to specific channels / signals. In other words, the proposals of the present disclosure may be applied in the same or similarly to all channels / signals (e.g., all uplink channels, all uplink signals, all downlink channels, all downlink signals).

[0211] The operation of the method according to the present disclosure can be implemented as a computer-readable program or code on a computer-readable recording medium. A computer-readable recording medium includes any type of recording device in which information that can be read by a computer system is stored. Additionally, a computer-readable recording medium may be distributed across networked computer systems, allowing the computer-readable program or code to be stored and executed in a distributed manner.

[0212] In addition, computer-readable recording media may include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, and flash memory. Program instructions may include machine code, such as that generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter, etc.

[0213] Some aspects of the present disclosure have been described in the context of a device, but may also be described according to a corresponding method, wherein a block or device corresponds to a method step or a feature of a method step. Similarly, aspects described in the context of a method may also be described according to a corresponding block or item or a feature of a corresponding device. Some or all of the method steps may be performed by (or using) a hardware device, such as, for example, a microprocessor, a programmable computer, or an electronic circuit. In some embodiments, at least one of the most important method steps may be performed by such a device.

[0214] A programmable logic device (e.g., a field-programmable gate array) may be used to perform some or all of the functions of the methods described in this disclosure. A field-programmable gate array may operate with a microprocessor to perform one of the methods described in this disclosure. Generally, it is preferable that the methods be performed by some hardware device.

[0215] Although the present disclosure has been described with reference to preferred embodiments, those skilled in the art will understand that various modifications and changes can be made to the present disclosure without departing from the spirit and scope of the present disclosure as set forth in the following claims.

Claims

1. As a method of UE (user equipment), A step of determining the transmission power for the SRS (sounding reference signal) transmission based on power parameters for uplink transmission performed prior to the SRS transmission; and It includes the step of performing the SRS transmission using the transmission power, The symbol type associated with the above SRS transmission and the above uplink transmission is the same, and the symbol type is an N(non)-SBFD (subband full duplex) symbol or an SBFD symbol, UE's method.

2. In Claim 1, Based on the fact that the above SRS transmission is established at the above N-SBFD symbol and another uplink transmission is associated with the above SBFD symbol immediately before the above SRS transmission, the above uplink transmission is the most recent uplink transmission associated with the above N-SBFD symbol among the uplink transmissions prior to the above other uplink transmission, UE's method.

3. In Claim 1, Based on the fact that the above SRS transmission is established at the above SBFD symbol and another uplink transmission is associated with the above N-SBFD symbol immediately before the above SRS transmission, the above uplink transmission is the most recent uplink transmission associated with the above SBFD symbol among the uplink transmissions prior to the above other uplink transmission, UE's method.

4. In Claim 1, The method further includes the step of receiving downlink control information (DCI) from a base station, which includes information requesting the SRS transmission and a transmission power control (TPC) command for the symbol type associated with the SRS transmission. The above transmission power is determined based further on the above TPC command, UE's method.

5. In Claim 1, The above uplink transmission is not a PUSCH (physical uplink shared channel) transmission, but another SRS transmission prior to the above SRS transmission, UE's method.

6. In Claim 1, The above power parameter is a power control adjustment state among a plurality of parameters used to determine the transmission power, UE's method.

7. In Claim 1, The method further includes the step of receiving a first SRS resource set setting for the N-SBFD symbol and a second SRS resource set setting for the SBFD symbol from a base station, In the above N-SBFD symbol, the SRS transmission is based on the first SRS resource set configuration, and in the above SBFD symbol, the SRS transmission is based on the second SRS resource set configuration, UE's method.

8. In Claim 1, The method further includes the step of receiving from a base station one SRS resource set setting, comprising a first SRS resource setting for the N-SBFD symbol and a second SRS resource setting for the SBFD symbol, and In the above N-SBFD symbol, the SRS transmission is based on the first SRS resource configuration, and in the above SBFD symbol, the SRS transmission is based on the second SRS resource configuration, UE's method.

9. In Claim 1, The method further includes the step of receiving from a base station an offset indicating the location of SRS resources for the above SRS transmission in the time domain, The above offset starts from the start or end symbol of the UL (uplink) subband, UE's method.

10. In Claim 1, Based on the fact that the above SRS transmission is associated with the above SBFD symbol and a transmission comb indicating SRS resources for the above SRS transmission in the frequency domain is indicated to the UE, the above SRS transmission is performed using one or more SRS resources belonging to the UL subband among the SRS resources indicated by the transmission comb, and the above SRS transmission is not performed on at least one SRS resource among the SRS resources indicated by the transmission comb that does not belong to the UL subband, UE's method.

11. As UE (user equipment), It includes at least one processor, The above at least one processor is the UE, Determining the transmission power for the SRS (sounding reference signal) transmission based on power parameters for uplink transmission performed prior to the SRS transmission; and Causing the above transmission power to perform the above SRS transmission, and The symbol type associated with the above SRS transmission and the above uplink transmission is the same, and the symbol type is an N(non)-SBFD (subband full duplex) symbol or an SBFD symbol, UE.

12. In Claim 11, Based on the fact that the above SRS transmission is established at the above N-SBFD symbol and another uplink transmission is associated with the above SBFD symbol immediately before the above SRS transmission, the above uplink transmission is the most recent uplink transmission associated with the above N-SBFD symbol among the uplink transmissions prior to the above other uplink transmission, UE.

13. In Claim 11, Based on the fact that the above SRS transmission is established at the above SBFD symbol and another uplink transmission is associated with the above N-SBFD symbol immediately before the above SRS transmission, the above uplink transmission is the most recent uplink transmission associated with the above SBFD symbol among the uplink transmissions prior to the above other uplink transmission, UE.

14. In Claim 11, The above at least one processor is the UE, Further causing to receive DCI (downlink control information) from a base station, which includes information requesting the above SRS transmission and TPC (transmission power control) commands for the symbol type associated with the above SRS transmission, and The above transmission power is determined based further on the above TPC command, UE.

15. In Claim 11, The above uplink transmission is not a PUSCH (physical uplink shared channel) transmission, but another SRS transmission prior to the above SRS transmission, UE.

16. In Claim 11, The above power parameter is a power control adjustment state among a plurality of parameters used to determine the transmission power, UE.

17. In Claim 11, The above at least one processor is the UE, Further causing to receive a first SRS resource set setting for the above N-SBFD symbol and a second SRS resource set setting for the above SBFD symbol from the base station, In the above N-SBFD symbol, the SRS transmission is based on the first SRS resource set configuration, and in the above SBFD symbol, the SRS transmission is based on the second SRS resource set configuration, UE.

18. In Claim 11, The above at least one processor is the UE, Further causing to receive from a base station one SRS resource set setting including a first SRS resource setting for the above N-SBFD symbol and a second SRS resource setting for the above SBFD symbol, and In the above N-SBFD symbol, the SRS transmission is based on the first SRS resource configuration, and in the above SBFD symbol, the SRS transmission is based on the second SRS resource configuration, UE.

19. In Claim 11, The above at least one processor is the UE, It further causes receiving from the base station an offset indicating the location of SRS resources for the above SRS transmission in the time domain, and The above offset starts from the start or end symbol of the UL (uplink) subband, UE.

20. In Claim 11, Based on the fact that the above SRS transmission is associated with the above SBFD symbol and a transmission comb indicating SRS resources for the above SRS transmission in the frequency domain is indicated to the UE, the above SRS transmission is performed using one or more SRS resources belonging to the UL subband among the SRS resources indicated by the transmission comb, and the above SRS transmission is not performed on at least one SRS resource among the SRS resources indicated by the transmission comb that does not belong to the UL subband, UE.

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