Method and device for MPE reporting in communication system

Abstract

A method and a device for MPE reporting in a communication system are disclosed. A method of a UE comprises the steps of: receiving, from a base station, a signaling message including information required for MPE P-MPR reporting; when a triggering condition of the MPE P-MPR reporting is satisfied, generating a MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field; and transmitting the MPE P-MPR report to the base station.

Description

Method and device for MPE reporting in communication systems

[0001] The present disclosure relates to communication technology, and more particularly, to a maximum permissible exposure (MPE) reporting technology for uplink transmission based on STxMP (simultaneous transmission across multiple panels).

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

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

[0004] Meanwhile, multiple transmission and reception points (mTRPs) can be introduced into communication networks (e.g., 5G and / or 6G). mTRPs can be geographically separated. Base stations can use mTRPs to communicate with terminals. mTRP technology can be used to address quality of service (QoS) degradation issues for cell-edge terminals and / or inter-cell interference issues. mTRP technology can also be used to provide additional communication paths in environments where non-line-of-sight (NLOS) paths are limited.

[0005] mTRP-based communication can be performed based on either the coherent joint transmission (CJT) scheme or the non-CJT (NCJT) scheme. In the CJT scheme, mTRP can perform cooperative communication based on a stable backhaul link and provide synchronized communication services to terminals. In the NCJT scheme, mTRP can provide communication services to terminals without cooperation. For example, in the NCJT scheme, mTRP can perform scheduling operations, precoding matrix selection operations, and modulation and coding scheme (MCS) determination operations without cooperation.

[0006] A terminal may include multiple panels (e.g., panel #1 and panel #2). Depending on the panel change of the terminal, the number of antenna ports, maximum transmission rank, etc. may vary. Due to the maximum permissible exposure (MPE) issue, the terminal may perform UL (uplink) transmission using low transmission power. In this case, the transmission range of the UL signal may be reduced due to the low transmission power. A communication system may support STxMP (simultaneous transmission across multiple panels) UL transmission. In a communication system supporting STxMP UL transmission, the terminal performs UL transmission simultaneously using multiple panels, and therefore, an improvement in the MPE reporting method for STxMP UL transmission may be necessary.

[0007] The purpose of the present disclosure to solve the above problems is to provide a method and device for reporting MPE (maximum permissible exposure) for uplink transmission based on STxMP (simultaneous transmission across multiple panels).

[0008] According to embodiments of the present disclosure for achieving the above object, a method of a UE includes the steps of receiving a signaling message including information required for an MPE P-MPR report from a base station, generating the MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field when a triggering condition of the MPE P-MPR report is satisfied, and transmitting the MPE P-MPR report to the base station.

[0009] The signaling message may include at least one of information about a first MPE P-MPR pool associated with the first panel, information about a second MPE P-MPR pool associated with the second panel, or information about an association between SRS resource sets and MPE P-MPR pools.

[0010] The first MPE P-MPR pool may be associated with a first SRS resource set among the SRS resource sets, and the second MPE P-MPR pool may be associated with a second SRS resource set among the SRS resource sets.

[0011] Each of the first MPE P-MPR pool and the second MPE P-MPR pool may include a range for P-MPR values, and the range for the P-MPR values ​​in the first MPE P-MPR pool may be set to be the same as or different from the range for the P-MPR values ​​in the second MPE P-MPR pool.

[0012] The method of the UE may further include: determining a value of the first MPE field corresponding to a first P-MPR value for satisfying an MPE requirement within the first MPE P-MPR pool based on a measurement result of a signal received through the first panel; and determining a value of the second MPE field corresponding to a second P-MPR value for satisfying the MPE requirement within the second MPE P-MPR pool based on a measurement result of a signal received through the second panel.

[0013] If at least one of the first P-MPR value or the second P-MPR value is greater than or equal to a threshold, the MPE P-MPR report may be triggered.

[0014] If at least one of the change in the first P-MPR value or the change in the second P-MPR value is greater than or equal to a threshold, the MPE P-MPR report may be triggered.

[0015] Each of the first resource indicator and the second resource indicator may be SSBRI or CRI.

[0016] The UE and the base station can support STxMP UL transmission.

[0017] According to embodiments of the present disclosure for achieving the above object, a method of a base station includes the steps of transmitting a signaling message including information necessary for MPE P-MPR reporting to a UE, and, when a triggering condition of the MPE P-MPR reporting is satisfied, receiving from the UE the MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field.

[0018] The signaling message may include at least one of information about a first MPE P-MPR pool associated with the first panel, information about a second MPE P-MPR pool associated with the second panel, or information about an association between SRS resource sets and MPE P-MPR pools.

[0019] The first MPE P-MPR pool may be associated with a first SRS resource set among the SRS resource sets, and the second MPE P-MPR pool may be associated with a second SRS resource set among the SRS resource sets.

[0020] Each of the first MPE P-MPR pool and the second MPE P-MPR pool may include a range for P-MPR values, and the range for the P-MPR values ​​in the first MPE P-MPR pool may be set to be the same as or different from the range for the P-MPR values ​​in the second MPE P-MPR pool.

[0021] Each of the first resource indicator and the second resource indicator may be SSBRI or CRI.

[0022] The above base station and the UE can support STxMP UL transmission.

[0023] According to embodiments of the present disclosure for achieving the above object, a UE includes at least one processor, wherein the at least one processor causes the UE to receive a signaling message including information necessary for an MPE P-MPR report from a base station, and, when a triggering condition of the MPE P-MPR report is satisfied, generate the MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field, and transmit the MPE P-MPR report to the base station.

[0024] The signaling message may include at least one of information about a first MPE P-MPR pool associated with the first panel, information about a second MPE P-MPR pool associated with the second panel, or information about an association between SRS resource sets and MPE P-MPR pools.

[0025] The at least one processor may further cause the UE to determine a value of the first MPE field corresponding to a first P-MPR value for satisfying an MPE requirement within the first MPE P-MPR pool based on a measurement result of a signal received through the first panel, and to determine a value of the second MPE field corresponding to a second P-MPR value for satisfying the MPE requirement within the second MPE P-MPR pool based on a measurement result of a signal received through the second panel.

[0026] If at least one of the first P-MPR value or the second P-MPR value is greater than or equal to a threshold, the MPE P-MPR report may be triggered.

[0027] If at least one of the change in the first P-MPR value or the change in the second P-MPR value is greater than or equal to a threshold, the MPE P-MPR report may be triggered.

[0028] According to the present disclosure, a terminal supporting STxMP (simultaneous transmission across multiple panels) UL (uplink) transmission can transmit a PHR (power headroom report) MAC (medium access control) CE (control element) including panel-specific MPE (maximum permissible exposure) information to a base station. The base station can receive the PHR MAC CE from the terminal and check the panel-specific MPE information of the terminal included in the PHR MAC CE. The base station can schedule transmission (e.g., UL transmission and / or DL ​​(downlink) transmission) to the terminal based on the checked information. Therefore, in a communication system supporting STxMP UL transmission, a reporting procedure of a PHR MAC CE including MPE information can be efficiently performed, and the performance of the communication system can be improved.

[0029] Figure 1 is a conceptual diagram illustrating embodiments of a communication system.

[0030] Figure 2 is a block diagram illustrating embodiments of communication nodes constituting a communication system.

[0031] Figure 3 is a block diagram illustrating embodiments of communication nodes that perform communication.

[0032] Figure 4a is a block diagram illustrating embodiments of a transmission path.

[0033] Figure 4b is a block diagram illustrating embodiments of a receiving path.

[0034] Figure 5 is a conceptual diagram illustrating embodiments of system frames in a communication system.

[0035] Figure 6 is a conceptual diagram illustrating embodiments of subframes in a communication system.

[0036] Figure 7 is a conceptual diagram illustrating embodiments of slots in a communication system.

[0037] Figure 8 is a conceptual diagram illustrating embodiments of time-frequency resources in a communication system.

[0038] FIG. 9 is a block diagram illustrating embodiments of a single entry PHR MAC CE.

[0039] FIG. 10 is a block diagram illustrating embodiments of a multi-entry PHR MAC CE.

[0040] FIG. 11 is a block diagram illustrating embodiments of an improved single entry PHR MAC CE.

[0041] FIG. 12a and FIG. 12b are block diagrams illustrating embodiments of an enhanced multi-entry PHR MAC CE.

[0042] FIG. 13 is a block diagram illustrating embodiments of an enhanced single entry PHR for multiple TRP MAC CEs.

[0043] FIG. 14 is a block diagram illustrating embodiments of an enhanced multi-entry PHR for multi-TRP MAC CE.

[0044] FIG. 15 is a flowchart illustrating embodiments of a reporting method of a PHR MAC CE including an MPE field.

[0045] This disclosure may be subject to various modifications and various embodiments. Specific embodiments are illustrated and described in detail in the drawings. However, this is not intended to limit the disclosure to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the disclosure.

[0046] While terms such as "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present disclosure, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component." The term "and / or" may refer to a combination of multiple related items described herein or to any of multiple related items described herein.

[0047] 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 combinations of one or more 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 combinations of one or more of A and B.”

[0048] 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.”

[0049] When a component is referred to as being "connected" or "connected" to another component, it should be understood that it may be directly connected or connected to that other component, but that there may be other components intervening. Conversely, when a component is referred to as being "directly connected" or "connected" to another component, it should be understood that there are no other components intervening.

[0050] The terminology used in this disclosure is only used to describe specific embodiments and is not intended to limit the present disclosure. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this disclosure, it should be understood that the terms "comprises" or "has" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0051] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the art to which this disclosure pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and shall not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0052] Hereinafter, preferred embodiments of the present disclosure will be described in more detail with reference to the attached drawings. In order to facilitate an overall understanding in describing the present disclosure, the same reference numerals will be used for identical components in the drawings, and redundant descriptions of identical components will be omitted. In addition to the embodiments explicitly described in the present disclosure, operations may be performed according to combinations of embodiments, extensions of embodiments, and / or modifications of embodiments. The performance of some operations may be omitted, and the order of operation may be changed.

[0053] In an embodiment, even if a method (e.g., transmitting or receiving a signal) performed by a first communication node among communication nodes is described, a corresponding second communication node can perform a method (e.g., receiving or transmitting a signal) corresponding to the method performed by the first communication node. That is, if an operation of a UE (user equipment) is described, a corresponding base station can perform an operation corresponding to the operation of the UE. Conversely, if an operation of a base station is described, a corresponding UE can perform an operation corresponding to the operation of the base station.

[0054] A base station may be referred to as a NodeB, an evolved NodeB, a gNodeB (next generation node B), a gNB, a device, an apparatus, a node, a communication node, a BTS (base transceiver station), a RRH (radio remote head), a TRP (transmission reception point), a RU (radio unit), an RSU (road side unit), a radio transceiver, an access point, an access node, etc. A UE may be referred to as a terminal, a device, an apparatus, a node, a communication node, an end node, an access terminal, a mobile terminal, a station, a subscriber station, a mobile station, a portable subscriber station, an OBU (on-broad unit), etc.

[0055] In the present disclosure, signaling may be at least one of upper layer signaling, MAC 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 a transmission and reception operation of system information (e.g., a master information block (MIB), a system information block (SIB)) and / or a radio resource control (RRC) message. MAC signaling may refer to a transmission and reception operation of a MAC control element (CE). PHY signaling may refer to a transmission and reception operation of control information (e.g., downlink control information (DCI), uplink control information (UCI), sidelink control information (SCI)).

[0056] In the present disclosure, “an operation (e.g., a transmission operation) is set” may mean that “setting information for the operation (e.g., an information element, a parameter)” and / or “information instructing the performance of the operation” is signaled. “An information element (e.g., a parameter) is set” may mean that the information element is signaled. In the present disclosure, “a signal and / or a channel” may mean a signal, a channel, or “a signal and a channel,” and a signal may be used to mean “a signal and / or a channel.”

[0057] The communication network to which the embodiment is applied is not limited to what is described below, and the embodiment may be applied to various communication networks (e.g., 4G communication networks, 5G communication networks, and / or 6G communication networks). Here, the communication network may be used in the same sense as the communication system.

[0058] Figure 1 is a conceptual diagram illustrating embodiments of a communication system.

[0059] 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). In addition, the communication system (100) may further include a core network (e.g., a serving-gateway (S-GW), a packet data network (PDN)-gateway (P-GW), a mobility management entity (MME)). If the communication system (100) is a 5G communication system (e.g., a new radio (NR) system), the core network may include an access and mobility management function (AMF), a user plane function (UPF), a session management function (SMF), etc.

[0060] A plurality of communication nodes (110 to 130) can support a communication protocol (e.g., LTE communication protocol, LTE-A communication protocol, NR communication protocol, etc.) specified in the 3GPP (3rd generation partnership project) standard. The plurality of communication nodes (110 to 130) may 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 plurality of communication nodes may have the following structure.

[0061] Figure 2 is a block diagram illustrating embodiments of communication nodes constituting a communication system.

[0062] Referring to FIG. 2, a communication node (200) may include at least one processor (210), a memory (220), and a transmission / reception device (230) that is connected to a network and performs communication. In addition, 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) and communicate with each other.

[0063] The processor (210) can execute program commands stored in at least one of the memory (220) and the storage device (260). The processor (210) may refer to a central processing unit (CPU), a graphics processing unit (GPU), or a dedicated processor in which the methods according to embodiments of the present disclosure are performed. Each of the memory (220) and the storage device (260) may be configured with at least one of a volatile storage medium and a non-volatile storage medium. For example, the memory (220) may be configured with at least one of a read-only memory (ROM) and a random access memory (RAM).

[0064] 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 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 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 within the cell coverage of the third base station (110-3). The first terminal (130-1) may be within the cell coverage of the fourth base station (120-1). The sixth terminal (130-6) may be within the cell coverage of the fifth base station (120-2).

[0065] Here, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be referred to as a NodeB (NB), an evolved NodeB (eNB), a gNB, an advanced base station (ABS), a high reliability-base station (HR-BS), a base transceiver station (BTS), a radio base station, a radio transceiver, an access point, an access node, a radio access station (RAS), a mobile multihop relay-base station (MMR-BS), a relay station (RS), an advanced relay station (ARS), a high reliability-relay station (HR-RS), a home NodeB (HNB), a home eNodeB (HeNB), a road side unit (RSU), a radio remote head (RRH), a transmission point (TP), a transmission and reception point (TRP), etc.

[0066] Each of the plurality of terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) may be referred to as a user equipment (UE), terminal equipment (TE), advanced mobile station (AMS), high reliability-mobile station (HR-MS), terminal, access terminal, mobile terminal, station, subscriber station, mobile station, portable subscriber station, node, device, on board unit (OBU), etc.

[0067] Meanwhile, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may operate in a different frequency band or may operate in the same frequency band. Each of the plurality of 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 the ideal backhaul link or the non-ideal backhaul link. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may be connected to the core network via the ideal backhaul link or the non-ideal backhaul link. Each of the plurality of 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.

[0068] Additionally, each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) may support MIMO transmission (e.g., single user (SU)-MIMO, multi user (MU)-MIMO, massive MIMO, etc.), coordinated multipoint (CoMP) transmission, carrier aggregation (CA) transmission, transmission in an unlicensed band, sidelink communication (e.g., device to device communication (D2D), proximity services (ProSe)), Internet of Things (IoT) 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 scheme, and the fourth terminal (130-4) can receive a signal from the second base station (110-2) by the SU-MIMO scheme. Alternatively, the second base station (110-2) can transmit signals 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 signals from the second base station (110-2) based on the MU-MIMO method.

[0069] 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 scheme, 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) based on the CoMP scheme. Each of the plurality of base stations (110-1, 110-2, 110-3, 120-1, 120-2) can transmit and receive a signal with terminals (130-1, 130-2, 130-3, 130-4, 130-5, 130-6) within its cell coverage based on the CA scheme. 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 under the control of the second base station (110-2) and the third base station (110-3), respectively.

[0070] Meanwhile, communication nodes performing communication in a communication network may be configured as follows. The communication node illustrated in Fig. 3 may be a specific embodiment of the communication node illustrated in Fig. 2.

[0071] Figure 3 is a block diagram illustrating embodiments of communication nodes that perform communication.

[0072] Referring to FIG. 3, each of the first communication node (300a) and the second communication node (300b) may be a base station or a UE. The first communication node (300a) may transmit a signal to the second communication node (300b). The 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 the controller (316). The control information may include at least one of system information, RRC configuration information (e.g., information configured by RRC signaling), MAC control information (e.g., MAC CE), or PHY control information (e.g., DCI, SCI).

[0073] The transmitting processor (311) may perform a processing operation on data (e.g., an encoding operation, a symbol mapping operation, etc.) to generate data symbol(s). The transmitting processor (311) may perform a processing operation on control information (e.g., an encoding operation, a symbol mapping operation, etc.) to generate control symbol(s). In addition, the transmitting processor (311) may generate synchronization / reference symbol(s) for a synchronization signal and / or a reference signal.

[0074] The Tx MIMO processor (312) may perform a spatial processing operation (e.g., a precoding operation) on data symbol(s), control symbol(s), and / or synchronization / reference symbol(s). The output (e.g., a symbol stream) of the Tx MIMO processor (312) may be provided to modulators (MODs) included in the transceivers (313a to 313t). The modulators (MODs) may perform a processing operation on the symbol stream to generate modulation symbols, and may perform an additional processing operation (e.g., an analog conversion operation, an amplification operation, a filtering operation, an upconversion operation) on the modulation symbols to generate signals. The signals generated by the modulators (MODs) of the transceivers (313a to 313t) may be transmitted via the antennas (314a to 314t).

[0075] Signals transmitted by the first communication node (300a) may be received by antennas (364a to 364r) of the second communication node (300b). Signals received by the antennas (364a to 364r) may be provided to demodulators (DEMODs) included in transceivers (363a to 363r). The demodulator (DEMOD) may perform a processing operation (e.g., a filtering operation, an amplification operation, a downconversion operation, a digital conversion operation) on the signal to obtain samples. The demodulator (DEMOD) may perform an additional processing operation on the samples to obtain symbols. The MIMO detector (362) may perform a MIMO detection operation on the symbols. The receiving processor (361) may perform a processing operation (e.g., a deinterleaving operation, a decoding operation) on the symbols. The output of the receiving processor (361) may be provided to a data sink (360) and a controller (366). For example, data may be provided to the data sink (360), and control information may be provided to the controller (366).

[0076] Meanwhile, the second communication node (300b) can transmit a signal to the first communication node (300a). The transmitting processor (368) included in the second communication node (300b) can receive data (e.g., data units) from a data source (367) and perform a processing operation on the data to generate data symbol(s). The transmitting processor (368) can receive control information from the controller (366) and perform a processing operation on the control information to generate control symbol(s). In addition, the transmitting processor (368) can perform a processing operation on a reference signal to generate reference symbol(s).

[0077] The Tx MIMO processor (369) may perform spatial processing operations (e.g., precoding operations) on data symbol(s), control symbol(s), and / or reference symbol(s). The output (e.g., symbol stream) of the Tx MIMO processor (369) may be provided to modulators (MODs) included in the transceivers (363a to 363t). The modulators (MODs) may perform processing operations on the symbol streams to generate modulation symbols, and may perform additional processing operations (e.g., analog conversion operations, amplification operations, filtering operations, upconversion operations) on the modulation symbols to generate signals. The signals generated by the modulators (MODs) of the transceivers (363a to 363t) may be transmitted via the antennas (364a to 364t).

[0078] Signals transmitted by the second communication node (300b) may be received by the antennas (314a to 314r) of the first communication node (300a). The signals received by the antennas (314a to 314r) may be provided to demodulators (DEMODs) included in the transceivers (313a to 313r). The demodulator (DEMOD) may perform a processing operation (e.g., a filtering operation, an amplification operation, a downconversion operation, a digital conversion operation) on the signal to obtain samples. The demodulator (DEMOD) may perform an additional processing operation on the samples to obtain symbols. The MIMO detector (320) may perform a MIMO detection operation on the symbols. The receiving processor (319) may perform a processing operation (e.g., a deinterleaving operation, a decoding operation) on the symbols. The output of the receiving processor (319) may be provided to a data sink (318) and a controller (316). For example, data may be provided to the data sink (318) and control information may be provided to the controller (316).

[0079] Memories (315 and 365) can store data, control information, and / or program code. Scheduler (317) can perform scheduling operations for communication. The processors (311, 312, 319, 361, 368, 369) and controllers (316, 366) illustrated in FIG. 3 may be the processor (210) illustrated in FIG. 2 and may be used to perform the methods described in the present disclosure.

[0080] 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.

[0081] Referring to FIGS. 4A and 4B, a transmission path (410) may be implemented in a communication node that transmits a signal, and a reception path (420) may be implemented in 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 receiving 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 may be a natural number.

[0082] In the transmission path (410), information bits may be input to a channel coding and modulation block (411). The channel coding and modulation block (411) may perform a coding operation (e.g., a low-density parity check (LDPC) coding operation, a polar coding operation, etc.) and a modulation operation (e.g., a quadrature phase shift keying (QPSK), a quadrature amplitude modulation (QAM), etc.) on the information bits. The output of the channel coding and modulation block (411) may be a sequence of modulation symbols.

[0083] The S-to-P block (412) can convert modulation symbols in the frequency domain into parallel symbol streams to generate N parallel symbol streams. N can be an IFFT size or an FFT size. The N IFFT block (413) can perform an IFFT operation on the N parallel symbol streams to generate signals in the time domain. The P-to-S block (414) can convert the output (e.g., parallel signals) of the N IFFT block (413) into a serial signal to generate a serial signal.

[0084] The CP addition block (415) can insert a CP into a 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 at the baseband before up-conversion.

[0085] A signal transmitted from a transmission path (410) may be input to a reception path (420). An operation in the reception path (420) may be the reverse operation of the operation in the transmission path (410). A DC (421) may down-convert the frequency of the received signal to a baseband frequency. A CP removal block (422) may remove a CP from a signal. The output of the CP removal block (422) may be a serial signal. An S-to-P block (423) may convert the serial signal into parallel signals. An N FFT block (424) may perform an FFT algorithm to generate N parallel signals. A P-to-S block (425) may convert the parallel signals into a sequence of modulation symbols. A 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 data.

[0086] In FIGS. 4A and 4B , Discrete Fourier Transform (DFT) and Inverse DFT (IDFT) may be used instead of FFT and IFFT. Each of the blocks (e.g., components) in FIGS. 4A and 4B may be implemented by at least one of hardware, software, or firmware. For example, some of the blocks in FIGS. 4A and 4B 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 , a block may be subdivided into multiple blocks, multiple blocks may be integrated into a single block, some blocks may be omitted, and blocks supporting other functions may be added.

[0087] Figure 5 is a conceptual diagram illustrating embodiments of a system frame in a communication system.

[0088] Referring to FIG. 5, time resources in a communication system can be divided into frame units. 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 (milliseconds). 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 the system frame after system frame #1023 can be #0.

[0089] A system frame may include two half frames. A half frame may be 5 ms long. 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 include 10 subframes. A subframe may be 1 ms long. The 10 subframes within a system frame may be referred to as "subframes #0-9."

[0090] Figure 6 is a conceptual diagram illustrating embodiments of subframes in a communication system.

[0091] Referring to FIG. 6, one subframe may include n slots, where n may be a natural number. Accordingly, one subframe may be composed of one or more slots.

[0092] Figure 7 is a conceptual diagram illustrating embodiments of slots in a communication system.

[0093] Referring to FIG. 7, a single slot may include one or more symbols. A single slot illustrated in FIG. 7 may include 14 symbols. The length of a slot may vary depending on the number and length of symbols contained in the slot. Alternatively, the length of a slot may vary depending on numerology.

[0094] In a communication system, the numerology applied to physical signals and channels may be variable. The numerology may be variable to meet various technical requirements of the communication system. In a communication system applying CP (cyclic prefix)-based OFDM waveform technology, the numerology may include subcarrier spacing and CP length (or CP type). Table 1 may be a first embodiment of a method for configuring a numerology for a CP-OFDM-based communication system. At least some of the numerologies in Table 1 may be supported depending on the frequency band in which the communication system operates. In addition, the communication system may additionally support numerologies not listed in Table 1.

[0095]

[0096] When the subcarrier spacing is 15 kHz (e.g., μ=0), the slot length can be 1 ms. In this case, one system frame can contain 10 slots. When the subcarrier spacing is 30 kHz (e.g., μ=1), the slot length can be 0.5 ms. In this case, one system frame can contain 20 slots.

[0097] When the subcarrier spacing is 60 kHz (e.g., μ=2), the slot length can be 0.25 ms. In this case, one system frame can contain 40 slots. When the subcarrier spacing is 120 kHz (e.g., μ=3), the slot length can be 0.125 ms. In this case, one system frame can contain 80 slots. When the subcarrier spacing is 240 kHz (e.g., μ=4), the slot length can be 0.0625 ms. In this case, one system frame can contain 160 slots.

[0098] A symbol may be configured as a downlink (DL) symbol, a flexible (FL) symbol, or an uplink (UL) symbol. A slot consisting solely of DL symbols may be referred to as a "DL slot," a slot consisting solely of FL symbols may be referred to as an "FL slot," and a slot consisting solely of UL symbols may be referred to as a "UL slot."

[0099] The slot format can be semi-statically configured by higher layer signaling (e.g., RRC signaling). Information indicating the semi-static slot format can be included in the system information, and the semi-static slot format can be configured cell-specifically. In addition, the semi-static slot format can be additionally configured for each terminal through terminal-specific higher layer signaling (e.g., RRC signaling). The flexible symbol of the cell-specifically configured slot format can be overridden to a downlink symbol or an uplink symbol by terminal-specific higher layer signaling. In addition, the slot format can be dynamically indicated by physical layer signaling (e.g., a slot format indicator (SFI) included in DCI). The semi-statically configured slot format can be overridden by a dynamically indicated slot format. For example, the semi-statically configured flexible symbol can be overridden to a downlink symbol or an uplink symbol by the SFI.

[0100] The reference signal may be a channel state information-reference signal (CSI-RS), a sounding reference signal (SRS), a demodulation-reference signal (DM-RS), a phase tracking-reference signal (PT-RS), etc. The channel may be a physical broadcast channel (PBCH), a physical downlink control channel (PDCCH), a physical downlink shared channel (PDSCH), a physical uplink control channel (PUCCH), a physical uplink shared channel (PUSCH), a physical sidelink control channel (PSCCH), a physical sidelink shared channel (PSSCH), etc. In the present disclosure, a control channel may mean a PDCCH, a PUCCH, or a PSCCH, and a data channel may mean a PDSCH, a PUSCH, or a PSSCH.

[0101] Figure 8 is a conceptual diagram illustrating embodiments of time-frequency resources in a communication system.

[0102] 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 may be defined as a "RE (resource element)". Resources consisting of one OFDM symbol in the time domain and K subcarriers in the frequency domain may be defined as a "REG (resource element group)". A REG may include K REs. A REG may be used as a basic unit for resource allocation in the frequency domain. K may be a natural number. For example, K may be 12. N may be a natural number. In the slot illustrated in FIG. 7, N may be 14. N OFDM symbols may be used as a basic unit for resource allocation in the time domain.

[0103] In the present disclosure, RB may mean CRB (common RB). Alternatively, RB may mean PRB or VRB (virtual RB). In a communication system, CRB may mean RB that constitutes a set of consecutive RBs (e.g., a common RB grid) based on a reference frequency (e.g., point A). Carriers and / or bandwidth portions may be arranged on the common RB grid. That is, the carrier and / or bandwidth portions may be composed of CRB(s). RBs or CRBs that constitute the bandwidth portions may be referred to as PRBs, and within the bandwidth portions, the CRB index may be appropriately converted to the PRB index.

[0104] Downlink data can be transmitted via the PDSCH. The base station can transmit PDSCH configuration information (e.g., scheduling information) to the terminal via the PDCCH. The terminal can obtain the PDSCH configuration information by receiving the PDCCH (e.g., downlink control information (DCI)). For example, the PDSCH configuration information can include the MCS (modulation coding scheme) 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. The PDSCH can refer to a radio resource through which downlink data is transmitted and received. Alternatively, the PDSCH can refer to the downlink data itself. The PDCCH can refer to a radio resource through which downlink control information (e.g., DCI) is transmitted and received. Alternatively, the PDCCH can refer to the downlink control information itself.

[0105] A terminal can perform a monitoring operation on the PDCCH to receive a PDSCH transmitted from a base station. The base station can inform the terminal of the configuration information for the PDCCH monitoring operation using a higher layer message (e.g., an RRC (radio resource control) message). The configuration information for the PDCCH monitoring operation can include CORESET (control resource set) information and search space information.

[0106] 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. The PDCCH occasion may be a region where the PDCCH can exist. That is, the PDCCH occasion may be a region where DCI can be transmitted. The PDCCH occasion may be referred to as a PDCCH candidate. The 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., in PRB (physical resource block) units or CRB (common resource block) units).

[0107] The search space information may include a coreset identifier (ID) associated with the search space, a period of PDCCH monitoring, and / or an offset. The period and offset of PDCCH monitoring may each be indicated on a slot-by-slot basis. In addition, the search space information may further include an index of the symbol at which the PDCCH monitoring operation begins.

[0108] A base station can configure a bandwidth part (BWP) for downlink communication. The BWP can be configured differently for each terminal. The base station can inform the terminal of the BWP configuration information using higher layer signaling. The higher layer signaling can mean "transmission operation of system information" and / or "transmission operation of RRC (radio resource control) message." The number of BWPs configured for one terminal can be one or more. The terminal can receive BWP configuration information from the base station and check the BWP(s) configured by the base station based on the BWP configuration information. When multiple BWPs are configured for downlink communication, the base station can activate one or more BWPs among the multiple BWPs. The base station can transmit the configuration information of the activated BWP(s) to the terminal using at least one of higher layer signaling, a medium access control (MAC) control element (CE), or DCI. The base station can 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 perform a downlink reception operation in the activated BWP(s).

[0109] Meanwhile, a communication system (e.g., NR communication system, 5G communication system, 6G communication system) may support usage scenarios such as enhanced Mobile BroadBand (eMBB), Ultra Reliable Low Latency Communication (URLLC), and massive Machine Type Communication (mMTC). A communication system (e.g., a communication network) may support transmission and reception point (TRP) technology (e.g., multiple TRP (mTRP) technology and / or single TRP (sTRP) technology). A communication system supporting the TRP technology may be referred to as a TRP system (e.g., mTRP system and / or sTRP system). In the present disclosure, TRP may have a meaning including sTRP and / or mTRP, and TRP may mean sTRP or mTRP depending on the context. TRP may mean an antenna set, an antenna group, and / or an antenna array. A TRP may be associated with a CORESET and / or a beam (e.g., a beam group).

[0110] mTRP technology may fall under the category of MIMO technology. mTRP may have characteristics (e.g., level characteristics) of macrocells, small cells, picocells, and / or femtocells. mTRP can perform data transmission for a single terminal. In a channel (e.g., a link) with uneven channel conditions due to obstacles and / or interference, mTRP can attenuate the effects of the obstacles and / or interference. mTRP can improve the data transmission rate for terminals located at cell edge areas.

[0111] mTRP-based communication can be performed using either coherent joint transmission (CJT) or non-CJT (NCJT) methods. In CJT, the base station can obtain channel information between each mTRP and the terminal and perform preprocessing on the data based on this channel information. In this case, the overhead associated with transmitting channel information may increase, and synchronization constraints between TRPs may arise. In NCJT, the base station may not need to know the channel information between each mTRP and the terminal. mTRPs can transmit data to the terminal without performing preprocessing operations such as phase compensation. The complexity of NCJT may be lower than that of CJT.

[0112] NCJT-based mTRP communication can be performed based on a single DCI scheme or a multiple DCI scheme. In the single DCI scheme, PDSCHs transmitted by an mTRP can be scheduled by a single DCI. A single DCI can be transmitted by one TRP among the mTRPs. In the multiple DCI scheme, the PDSCHs transmitted by each TRP can be scheduled by the DCI transmitted by each TRP. For example, a first PDSCH transmitted by a first TRP can be scheduled by a first DCI transmitted by the first TRP, and a second PDSCH transmitted by a second TRP can be scheduled by a second DCI transmitted by the second TRP. In other words, multiple PDSCHs can be scheduled using multiple DCIs.

[0113] In a single SCI scheme, a terminal can expect to receive PDSCHs transmitted by different TRPs over the same time and frequency resources and across different layers. Alternatively, the terminal can expect to receive PDSCHs transmitted by different TRPs over the same frequency resources and across the same layer but across different time resources (e.g., across different time domains). Alternatively, the terminal can expect to receive PDSCHs transmitted by different TRPs over the same time resources and across the same layer but across different frequency resources (e.g., across different frequency domains).

[0114] In a multi-DCI scheme, scheduling of PDSCHs for each TRP can be performed by a separate DCI. The PDSCHs scheduled by multiple DCIs may fully overlap or partially overlap. Alternatively, the PDSCHs scheduled by multiple DCIs may not overlap. In both single-DCI and multi-DCI schemes, the DCI may include transmission configuration indicator (TCI) status information for the PDSCH.

[0115] The indication / setting of the TCI state for the terminal can be interpreted as the indication / setting of a beam (e.g., a transmit beam and / or a receive beam). In other words, the TCI state can have a meaning corresponding to the beam. From the perspective of DL (downlink) communication, the setting of the TCI state can mean the setting of QCL (quasi co-location). From the perspective of UL (uplink) communication, the setting of the TCI state can mean the setting of a spatial filter. The unified TCI state can indicate (e.g., set) a common beam regardless of DL communication and UL communication. Alternatively, the unified TCI state can indicate (e.g., set) a common beam for each of DL communication and UL communication. The unified TCI can be referred to as UTCI.

[0116] Enhancements (e.g., PDCCH enhancements) may be implemented to improve the reliability and / or robustness of mTRP communications. Deployment scenarios for PDCCH enhancements can be categorized into single frequency network (SFN) and non-SFN scenarios.

[0117] In the SFN scheme, different TRPs or different panels can transmit the same PDCCH using the same resources (e.g., the same time resources, the same frequency resources, and / or the same spatial resources). In other words, all TRPs or all panels can transmit the same PDCCH using the same DMRS configuration, the same DMRS location, and / or the same DMRS sequence. At this time, the TCI states for the reception perspective of the TRPs or panels can be implicitly set differently. The above embodiment can be performed based on multiple TCI states of the CORESET. There may be synchronization constraints for ideal or near-ideal backhaul between TRPs.

[0118] In the NSFN scheme, the PDCCH generated from each TRP can be multiplexed in the time domain and / or frequency domain, and the multiplexed PDCCH can be transmitted to the terminal. The scheme may be an mTRP-based PDCCH repetition scheme. In the NSFN scheme, the same number of bits as the encoded bits transmitted through one PDCCH generated from each TRP can be divided for each TRP, and the bits (e.g., encoded bits) for each TRP can be transmitted through different PDCCH candidates. The scheme may be an sTRP-based PDCCH transmission scheme.

[0119] In the mTRP-based PDCCH repetition scheme, the PDCCH can be repeatedly generated as many times as the number of TRPs, and the PDCCH can be transmitted in the same search space (e.g., search spaces having the same index) within different search space sets having the same number of PDCCH candidates. At this time, the search space sets can exist within the same CORESET or different CORESETs. Since one TCI state can be associated with each CORESET, when the PDCCH is transmitted in different search spaces within the same CORESET, only one TCI state can be indicated (e.g., set) for the PDCCHs transmitted in the different search spaces. In this case, the UE can receive the PDCCH from one TRP at a specific time.

[0120] When a PDCCH is transmitted in the same search space within different CORESETs, the UE can implicitly expect to receive the PDCCH from either the sTRP or the mTRP, depending on the number of TCI states (e.g., TCI states indicated or configured by the base station). In this case, a single PDCCH can be split as many times as the number of TRPs, and the split PDCCHs can be transmitted on different PDCCH candidates. At this time, the aggregation level and the combined aggregation level can be the same. In the above embodiment, the PDCCH candidates can be assigned to different CORESETs. The payload size for the final distributed PDCCH combination can be the same as the payload size of the PDCCH transmitted in the sTRP. Therefore, in terms of decoding complexity, the sTRP-based PDCCH transmission scheme can be advantageous over the mTRP-based PDCCH repetition scheme.

[0121] A terminal can perform mTRP communication or sTRP communication with a base station. mTRP communication between the terminal and the base station can be performed through an mTRP associated with the base station. sTRP communication between the terminal and the base station can be performed through an sTRP associated with the base station. mTRP communication may be referred to as first TRP communication, and sTRP communication may be referred to as second TRP communication. Alternatively, mTRP communication may be referred to as second TRP communication, and sTRP communication may be referred to as first TRP communication. "The terminal performs first TRP communication with the base station" may mean "the terminal performs mTRP communication or sTRP communication with the base station through one or more TRPs associated with the base station." "The terminal performs second TRP communication with the base station" may mean "the terminal performs sTRP communication or mTRP communication with the base station through one or more TRPs associated with the base station."

[0122] In a communication system, integrated TCI can be supported. A base station can transmit information about a pool (e.g., a list) of TCI states to a terminal using RRC signaling. The terminal can receive information about a pool (e.g., a list) of TCI states through RRC signaling from the base station. The base station can set type information about the TCI state to the terminal. The type information can be a joint DL / UL beam indication or a separate DL / UL beam indication. A joint DL / UL beam indication can be referred to as a 'joint indication or joint type.' An independent DL / UL beam indication can be referred to as an 'independent indication or independent type.'

[0123] When a joint type (e.g., joint indication) is set, TCI states (e.g., one TCI state) for DL ​​and UL may be set. In other words, DL TCI state setting and UL TCI state setting may be the same. The UE may expect that the TCI state indicated by the information element included in the PDSCH configuration information applies to both DL (e.g., DL signal / channel) and UL (e.g., UL signal / channel). The signal / channel may refer to a signal and / or a channel. When an independent type (e.g., independent indication) is set, TCI states for DL ​​and UL may be set respectively. In other words, DL TCI state setting may be distinguished from UL TCI state setting. The UE may expect that the UL TCI state indicated by the information element included in the UL BWP configuration information applies to UL (e.g., UL signal / channel). The UL signal / channel may include a PUSCH, a PUCCH, and / or an SRS.

[0124] After the pool (e.g., pool list) for TCI states is configured (e.g., indicated) by RRC signaling, the base station can use DCI (e.g., DCI signaling) to indicate the TCI state (e.g., application of the TCI state). Due to the constraint of the DCI size (e.g., bits in the DCI field), the base station can preferentially activate candidate TCI state(s) using MAC signaling (e.g., MAC CE signaling). In other words, as many (e.g., maximum number) candidate TCI state(s) as can be indicated (e.g., configured) via DCI can be preferentially activated by MAC CE.

[0125] For the activated candidate TCI state(s), the DCI may contain code points corresponding to a single TCI state or two TCI states, depending on the TCI state type (e.g., joint type or independent type). If the joint type is set, the code points corresponding to a single TCI state may be conveyed by the DCI. If the independent type is set, the code points corresponding to two TCI states may be conveyed by the DCI.

[0126] Meanwhile, a unified TCI framework may be used for enhanced MIMO communication. Extension of the unified TCI framework for multiple DL and UL TCI status indications in multi-TRP communication may be supported. Up to two TRPs and up to two panels may be used in uplink communication, and uplink transmission based on simultaneous transmission across multiple panels (STxMP) may be required for higher UL throughput and / or reliability. STxMP-based uplink transmission may be referred to as STxMP UL transmission or STxMP UL communication. An improved method for single-DCI-based STxMP UL transmission and / or an improved method for multi-DCI-based STxMP UL transmission may be required.

[0127] PUCCH transmission can be performed based on a repetitive transmission scheme (e.g., a repetitive transmission scheme based on time division multiplexing (TDM)) or a STxMP SFN scheme. In the TDM-based repetitive transmission scheme and the STxMP SFN scheme, two TCI states can be configured for one PUCCH resource. PUSCH transmission can be performed based on a repetitive transmission scheme (e.g., a TDM-based repetitive transmission scheme), a STxMP SFN scheme, or a SDM (spatial division multiplexing) scheme. PUSCH transmission can be scheduled by a single DCI, or PUSCH transmission can be scheduled by multiple DCIs. Two SRS resource sets can be configured.

[0128] Alternatively, the mTRP TDM-based repetitive transmission scheme, the STxMP SFN scheme, and the SDM scheme may be supported for PUCCH transmission and / or PUSCH transmission. In this case, for PUSCH transmission, switching operations between SFN and sTRP, switching operations between SFN and mTRP, switching operations between SDM and TDM, and / or switching operations between SDM and sTRP may be supported. Among the above-described switching operations, some switching operations (e.g., switching operations between SFN and sTRP) may be performed based on an SRS resource set indicator included in the DCI.

[0129] A terminal may include multiple panels (e.g., panel #1 and panel #2). Depending on the panel change of the terminal, the number of antenna ports, maximum transmission rank, etc. may vary. Due to the maximum permissible exposure (MPE) issue, the terminal may perform UL transmission using low transmission power. In this case, the transmission range of the UL signal may be reduced due to the low transmission power. In the present disclosure, a UL signal may mean including at least one of a UL signal or a UL channel. When a terminal has multiple panels, the terminal may perform UL transmission using a panel among the multiple panels in which the MPE issue does not occur. In this case, the terminal may perform UL transmission without a reduction in the transmission range (e.g., coverage) due to the MPE issue. The communication system may support STxMP UL transmission (e.g., STxMP SFN (single frequency network) transmission, STxMP SFN UL transmission). In a communication system supporting STxMP UL transmission, a terminal may perform UL transmission simultaneously using multiple panels, so an improvement in the MPE reporting method for STxMP UL transmission may be necessary. The terminal may transmit a PHR (Power Headroom Report) MAC CE containing the MPE to the base station.

[0130] FIG. 9 is a block diagram illustrating embodiments of a single entry PHR MAC CE.

[0131] Referring to Figure 9, a single entry PHR MAC CE may include a P field, an R field, a PH (power headroom) field, an MPE field (or a DPC field, an R field), and / or a P CMAX,f,cmay include a field. The P field may be set to 0 or 1. For example, if mpe-Reporting-FR2 is set, the serving cell operates in FR2, and the power management-maximum power reduction (P-MPR) value satisfies the MPE requirements, the P field may be set to 0. If mpe-Reporting-FR2 is set, the serving cell operates in FR2, and the P-MPR value does not satisfy the MPE requirements, the P field may be set to 1. The R field may be a reserved bit. The R field may be set to 0. The PH field may indicate a power headroom level. The power headroom level may be set as shown in Table 2 below.

[0132]

[0133] When mpe-Reporting-FR2 is set, the serving cell operates in FR2, and the P field is set to 1, the MPE field (e.g., MPE Information) may indicate the power backoff applied to satisfy MPE requirements. The MPE field may indicate an index defined in Table 3 below.

[0134]

[0135] The measured P-MPR value can be defined as shown in Table 4 below.

[0136]

[0137] When dpc-Reporting-FR1 is set and the serving cell operates in FR1, the DPC field may indicate a delta power class. The DPC field may indicate an index defined in Table 5 below.

[0138]

[0139] P CMAX,f,cThe field is P used for calculation of the PH field. CMAX,f,c can be directed. P CMAX,f,c A field can point to an index as defined in Table 6 below.

[0140]

[0141] FIG. 10 is a block diagram illustrating embodiments of a multiple entry PHR MAC CE.

[0142] Referring to Figure 10, the multi-entry PHR MAC CE is C i Field, DPC BC field (or R field), P field, V field, PH field, MPE field (or DPC field, R field), and / or P CMAX,f,c May contain fields C i The field may indicate the presence of a PH field for a serving cell with ServCellIndexi. C set to 0 i The field may indicate that the PH field for the serving cell with ServCellIndexi is not reported. C set to 1 i The field may indicate that the PH field is reported for the serving cell with ServCellIndexi.

[0143] If dpc-Reporting-FR1 is set and at least one DPC field is not set to 0, then DPC BC The field may indicate a delta power class for carrier aggregation (CA), a delta power class for dual connectivity (EN-DC), or a delta power class for NR-DC. The V field may indicate that the PH value is based on a real transmission or reference format. The PH field, P field, MPE field, DPC field, R field, and / or P field CMAX,f,cThe field may be set identically or similarly to the field in the embodiment of FIG. 9.

[0144] FIG. 11 is a block diagram illustrating embodiments of an enhanced single entry PHR MAC CE.

[0145] Referring to Figure 11, the enhanced single entry PHR MAC CE includes a P field, an R field, a PH field, an MPE field (or an R field), a P CMAX,f,c Field, B i Field, P i Field, MPE i Field (or R field), and / or resource i It may include fields. The P field, R field, PH field, and MPE field may be set identically or similarly to the corresponding fields in the embodiments of FIG. 9 and / or FIG. 10. B i Field is a resource i It can indicate the presence or absence of candidate beam information identified by the field. P i The field can be set to 0 or 1. For example, if mpe-Reporting-FR2-r17 is set, the serving cell operates in FR2, and the P-MPR value satisfies the MPE requirements, then P i The field can be set to 0 if mpe-Reporting-FR2-r17 is set, the serving cell operates in FR2, and the P-MPR value does not satisfy the MPE requirements. i The field can be set to 1.

[0146] mpe-Reporting-FR2-r17 is set, the serving cell operates in FR2, and P i If the field is set to 1, MPE i The field can indicate the power backoff applied to satisfy MPE requirements. MPE i The field may point to an index defined in Table 3 above. Resource iThe field may point to a candidate beam identified by the number of an entry in the mpe-ResourcePoolToAddModList. The mpe-ResourcePoolToAddModList may contain an MPE-Resource, which may contain an mpe-ResourceId, cell, additionalPCI, and an mpe-ReferenceSignal. The mpe-ReferenceSignal may contain a csi-RS-Resource and an ssb-Resource.

[0147] FIG. 12a and FIG. 12b are block diagrams illustrating embodiments of an enhanced multi-entry PHR MAC CE.

[0148] Referring to FIG. 12a and FIG. 12b, the enhanced multi-entry PHR MAC CE is C i Field, P field, V field, R field, PH field, MPE field (or R field), P CMAX,f,c Field, B i Field, P i Field, MPE i Field (or R field), and / or resource i May contain fields C i Field, P field, V field, R field, PH field, MPE field, P CMAX,f,c Field, B i Field, P i Field, MPE i Fields, and / or resources i The fields may be set identically or similarly to the corresponding fields in the embodiments of FIGS. 9 to 11.

[0149] FIG. 13 is a block diagram illustrating embodiments of an enhanced single entry PHR for multiple TRP MAC CEs.

[0150] Referring to Figure 13, an enhanced single entry PHR for multi-TRP MAC CE includes the P field, V field, PH i field, MPE field (or R field), and / or P CMAX,f,cmay include fields. The PH i field may indicate a power headroom level. The PH 1 field may be associated with an SRS-ResourceSet having a lower srs-ResourceSetId. The PH 1 field may be associated with an SRS-ResourceSet having a higher srs-ResourceSetId. The P field, the V field, the MPE field (or the R field), and / or the P CMAX,f,c The fields may be set identically or similarly to the corresponding fields in the embodiments of FIGS. 9 to 12a / b.

[0151] FIG. 14 is a block diagram illustrating embodiments of an enhanced multi-entry PHR for multi-TRP MAC CE.

[0152] Referring to Figure 14, an enhanced multi-entry PHR for multi-TRP MAC CE is C i field, R field, P field, V field, PH i field, MPE field (or R field), and / or P CMAX,f,c may contain fields. The PH i field may indicate the power headroom level. The P field, V field, PH i field, MPE field (or R field), and / or P CMAX,f,c The fields may be set identically or similarly to the corresponding fields in the embodiments of FIGS. 9 to 13.

[0153] A terminal may transmit a PHR MAC CE containing an MPE field (e.g., MPE information) to a base station if the following condition(s) are satisfied. The following condition(s) may be triggering condition(s) for transmission (e.g., reporting) of the PHR MAC CE.

[0154] - Condition 1: UL resource(s) allocated to the terminal exist. In other words, UL resource(s) used for transmitting PHR MAC CE are allocated to the terminal.

[0155] - Condition 2: mpe-Reporting-FR2 is set on the terminal.

[0156] - Condition 3: mpe-ProhibitTimer is not running.

[0157] - Condition 4: The measured P-MPR applied to satisfy FR2 MPE requirements is greater than or equal to the mpe-Threshold.

[0158] - Condition 5: Since the last PHR transmission (e.g., the last PHR MAC CE transmission) triggered by the measured P-MPR being greater than or equal to mpe-Threshold to satisfy the FR2 MPE requirements, the change in the measured P-MPR being greater than or equal to phr-Tx-PowerFactorChangedB to satisfy the FR2 MPE requirements.

[0159] A PHR MAC CE containing an MPE field may be referred to as an MPE P-MPR report. A PHR MAC CE (e.g., an MPE P-MPR report) may be a PHR MAC CE according to the embodiments of FIG. 9, FIG. 10, FIG. 11, FIG. 12a / b, FIG. 13, or FIG. 14. Alternatively, the PHR MAC CE may be a MAC CE having a new format.

[0160] The terminal may additionally report to the base station N P-MPR values ​​associated with N UL beams (e.g., N MPEs corresponding to the N P-MPR values). N may be a natural number. For example, N may be 1, 2, 3, or 4. The N P-MPR values ​​may be P-MPR values ​​reported by the PHR MAC CE. A terminal can report (P-MPR, SSBRI (SSB (synchronization signal block) resource indicator)) pairs or (P-MPR, CRI (CSI-RS resource indicator) pairs to a base station. maxNumP-MPR-RI-pairs included in a MIMO-ParametersPerBand information element received from a base station can indicate the maximum number of (P-MPR, SSBRI / CRI) pairs reported by the terminal. maxNumP-MPR-RI-pairs can indicate 1, 2, 3, or 4. In a (P-MPR, SSBRI) pair, SSBRI can indicate SSB resources associated with P-MPR in an SSB resource list configured by signaling from a base station. CRI in a (P-MPR, CRI) pair can indicate CSI-RS resources associated with P-MPR in a CSI-RS resource list configured by signaling from a base station.

[0161] When the triggering condition(s) for transmission (e.g., reporting) of PHR MAC CE are satisfied, the terminal may report N SSBRIs or N CRIs associated with P-MPR within the candidate resource list to the base station. The N SSBRIs or N CRIs are resource coding schemes in the embodiments of FIG. 11 and / or FIG. 12a / b. i Can be directed by fields.

[0162] In a communication system supporting STxMP UL transmission, an improved MPE reporting method may be required. Two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets may be configured in a terminal. For example, a base station may transmit configuration information of two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets to a terminal through signaling (e.g., higher layer signaling, MAC signaling, and / or PHY signaling). The terminal may receive configuration information of two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets through signaling from the base station. A first MPE P-MPR pool may be associated with an SRS resource set having a lower SRS resource set ID (index). A first MPR P-MPR pool and / or an SRS resource set having a lower SRS resource set ID may be associated with a first panel of the terminal. A second MPR P-MPR pool may be associated with an SRS resource set having a higher SRS resource set ID. The second MPR P-MPR pool and / or an SRS resource set having a higher SRS resource set ID may be associated with a second panel of the terminal. Alternatively, two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets may be predefined in the technical specification without signaling from the base station. Alternatively, when one MPE P-MPR pool exists (e.g., when a default MPE P-MPR pool is predefined in the technical specification), the base station may additionally configure one or more MPE P-MPR pools to the terminal through signaling.In this case, the base station can transmit to the terminal information about the relationship between two SRS resource sets and two MPE P-MPR pools or two or more MPE P-MPR pools through signaling.

[0163] The base station can transmit information to the terminal through signaling (e.g., higher layer signaling, MAC signaling, and / or PHY signaling) indicating that the use of two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets is enabled or disabled. The terminal can determine that the use of two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets is enabled or disabled through the signaling of the base station. Disabling the use of two MPE P-MPR pools or two or more MPE P-MPR pools associated with two SRS resource sets may mean that one MPE P-MPR pool (e.g., a default MPE P-MPR pool) associated with two SRS resource sets is used.

[0164] Two MPE P-MPR pools can be configured independently. The two MPE P-MPR pools can include a first MPE P-MPR pool and a second MPE P-MPR pool. The first MPE P-MPR pool can be configured as shown in Table 7 below. The second MPE P-MPR pool can be configured as shown in Table 8 below. In Tables 7 and 8, the ranges for measured quantity values ​​(e.g., P-MPR values) for the two MPE P-MPR pools can be the same.

[0165]

[0166]

[0167] When three or more MPE P-MPR pools are configured, two or more MPE P-MPR pools may be associated with one SRS resource set. In this case, the base station may transmit information about one MPE P-MPR pool used among two or more MPE P-MPR pools associated with one SRS resource set to the terminal through signaling (e.g., higher layer signaling, MAC signaling, and / or PHY signaling). The terminal may identify one MPE P-MPR pool used among two or more MPE P-MPR pools associated with one SRS resource set through signaling from the base station.

[0168] For another example, the first MPE P-MPR pool may be set as shown in Table 9 below. The second MPE P-MPR pool may be set as shown in Table 10 below. In Tables 9 and 10, the ranges for the measured quantity values ​​(e.g., P-MPR values) for the two MPE P-MPR pools may be different.

[0169]

[0170]

[0171] As another example, the first MPE P-MPR pool may be set as shown in Table 11 below. The second MPE P-MPR pool may be set as shown in Table 12 below. In Tables 11 and 12, the ranges for the measured quantity values ​​(e.g., P-MPR values) for the two MPE P-MPR pools may be different.

[0172]

[0173]

[0174] In the above-described embodiment, a first SRS resource set (e.g., an SRS resource set having a low SRS resource set ID or a high SRS resource set ID) may be associated with a first MPE P-MPR pool (e.g., a first MPE P-MPR resource). A second SRS resource set (e.g., an SRS resource set having a high SRS resource set ID or a low SRS resource set ID) may be associated with a second MPE P-MPR pool (e.g., a second MPE P-MPR resource). The base station may transmit association information between the SRS resource set and the MPE P-MPR pool to the terminal through signaling (e.g., higher layer signaling, MAC signaling, and / or PHY signaling). The terminal may check the association information between the SRS resource set and the MPE P-MPR pool through the signaling of the base station. For example, the association information between the SRS resource set and the MPE P-MPR pool may be indicated by an SRS resource set indicator included in the DCI.

[0175] The terminal may transmit to the base station a PHR MAC CE (e.g., an MPE P-MPR report) including a first MPE value determined based on a first MPE P-MPR pool, an SSBRI or CRI associated with the first MPE value (e.g., a P-MPR corresponding to the first MPE value), a second MPE value determined based on a second MPE P-MPR pool, and / or an SSBRI or CRI associated with the second MPE value (e.g., a P-MPR corresponding to the second MPE value). The first MPE P-MPR pool (e.g., a first SRS resource set associated with the first MPE P-MPR pool) may be associated with a first panel of the terminal, and the second MPE P-MPR pool (e.g., a second SRS resource set associated with the second MPE P-MPR pool) may be associated with a second panel of the terminal. The base station can receive a PHR MAC CE from the terminal, and can obtain a first MPE value included in the PHR MAC CE, an SSBRI or CRI associated with the first MPE value, a second MPE value, and / or an SSBRI or CRI associated with the second MPE value.

[0176] Alternatively, the PHR MAC CE may include a single MPE value that is common to the panels of the terminal. For example, the terminal may determine a common P-MPR value to satisfy MPE requirement(s) for both the first panel and the second panel based on measurement results for signals received through the first panel and measurement results for signals received through the second panel, and may determine a common MPE value corresponding to the common P-MPR value. The PHR MAC CE may include a common MPE value, an SSBRI or CRI for the first panel associated with the common MPE value (e.g., a common P-MPR corresponding to the common MPE value), and an SSBRI or CRI for the second panel associated with the common MPE value (e.g., a common P-MPR corresponding to the common MPE value).

[0177] The base station can determine whether UL transmissions are performed simultaneously on different panels of the terminal based on two SSBRIs or two CRIs included in the PHR MAC CE (e.g., MPE P-MPR report) of the terminal. If UL transmissions are performed simultaneously on different panels of the terminal, the base station can update the uplink beam pair for the STxMP UL transmission.

[0178] FIG. 15 is a flowchart illustrating embodiments of a reporting method of a PHR MAC CE including an MPE field.

[0179] Referring to FIG. 15, a base station and / or a terminal may support STxMP UL transmission. A terminal may have multiple panels, and the terminal may perform UL transmission simultaneously using the multiple panels. In S1510, the base station may transmit information necessary for reporting a PHR MAC CE including an MPE field (e.g., an MPE P-MPR report) to the terminal through signaling (e.g., upper layer signaling, MAC signaling, and / or PHY signaling). In S1510, the terminal may receive information necessary for reporting a PHR MAC CE including an MPE field through signaling from the base station. In S1510, the information transmitted by the base station (e.g., information received by the terminal) may include at least one of a PHR configuration information element (PHR-Config information element), mpe-ResourcePoolToAddModList, MPE-Resource, mpe-Mitigation (e.g., maxNumP-MPR-RI-pairs and / or maxNumConfRS), configuration information of two or more MPE P-MPR pools, information indicating enablement or disabling of use of two or more MPE P-MPR pools, association information between SRS resource set(s) and MPE P-MPR pool(s), or information indicating one MPE P-MPR pool to be used among two or more MPE P-MPR pools associated with one SRS resource set. The information transmitted by the base station in S1510 may be included in one signaling message or two or more signaling messages. For example, among the information transmitted by the base station in S1510, some of the information may be included in an upper layer signaling message or a MAC signaling message, and among the information transmitted by the base station in S1510, the remaining information may be included in a PHY signaling message.

[0180] The terminal can verify whether the triggering condition(s) for transmission (e.g., reporting) of the PHR MAC CE including the MPE field are satisfied (S1520). For example, the triggering condition(s) may be as follows.

[0181] - Condition 1: UL resource(s) allocated to the terminal exist. In other words, UL resource(s) used for transmitting PHR MAC CE are allocated to the terminal.

[0182] - Condition 2: mpe-Reporting-FR2 is set on the terminal.

[0183] - Condition 3: mpe-ProhibitTimer is not running.

[0184] - Condition 4: The measured P-MPR applied to satisfy FR2 MPE requirements is greater than or equal to the mpe-Threshold.

[0185] - Condition 5: Since the last PHR transmission (e.g., the last PHR MAC CE transmission) triggered when the measured P-MPR applied to satisfy the FR2 MPE requirements is greater than or equal to mpe-Threshold, the change in the measured P-MPR applied to satisfy the FR2 MPE requirements is greater than or equal to phr-Tx-PowerFactorChangedB.

[0186] A common mpe-Threshold can be set for the panels of the terminal. Alternatively, the mpe-Threshold can be set independently for each panel of the terminal. For example, the mpe-Threshold for the first panel of the terminal can be set differently from the mpe-Threshold for the second panel. Information on the mpe-Threshold for the panels of the terminal can be included in the signaling message of S1510. If one of the first P-MPR measured based on the signal received through the first panel of the terminal or the second P-MPR measured based on the signal received through the second panel of the terminal is equal to or greater than the mpe-Threshold, Condition 4 can be determined to be satisfied. Alternatively, if both the first P-MPR measured based on the signal received through the first panel of the terminal and the second P-MPR measured based on the signal received through the second panel of the terminal are equal to or greater than the mpe-Threshold, Condition 4 can be determined to be satisfied.

[0187] A common phr-Tx-PowerFactorChange can be set for the panels of the terminal. Alternatively, phr-Tx-PowerFactorChange can be set independently for each panel of the terminal. For example, phr-Tx-PowerFactorChange for the first panel of the terminal can be set differently from phr-Tx-PowerFactorChange for the second panel. Information about phr-Tx-PowerFactorChange for the panels of the terminal can be included in the signaling message of S1510. If either a change in the first P-MPR measured based on a signal received through the first panel of the terminal or a change in the second P-MPR measured based on a signal received through the second panel of the terminal is greater than or equal to phr-Tx-PowerFactorChangedB, condition 5 can be determined to be satisfied. Alternatively, if both the change in the first P-MPR measured based on the signal received through the first panel of the terminal and the change in the second P-MPR measured based on the signal received through the second panel of the terminal are equal to or greater than phr-Tx-PowerFactorChangedB, condition 5 may be determined to be satisfied.

[0188] If the triggering condition(s) are satisfied, the terminal may generate a PHR MAC CE (e.g., an MPE P-MPR report) (S1530). The PHR MAC CE may include a first MPE value determined based on a first MPE P-MPR pool, a resource indicator (e.g., an SSBRI or CRI) associated with the first MPE value (e.g., a P-MPR corresponding to the first MPE value), a second MPE value determined based on a second MPE P-MPR pool, and / or a resource indicator (e.g., an SSBRI or CRI) associated with the second MPE value (e.g., a P-MPR corresponding to the second MPE value).

[0189] Alternatively, the PHR MAC CE (e.g., MPE P-MPR report) may include a single MPE value that is common to the panels of the terminal. For example, the terminal may determine a common P-MPR value to satisfy MPE requirement(s) for both the first panel and the second panel based on measurement results for signals received through the first panel and measurement results for signals received through the second panel, and may determine a common MPE value corresponding to the common P-MPR value. The PHR MAC CE may include a common MPE value, an SSBRI or CRI for the first panel associated with the common MPE value (e.g., a common P-MPR corresponding to the common MPE value), and an SSBRI or CRI for the second panel associated with the common MPE value (e.g., a common P-MPR corresponding to the common MPE value).

[0190] The PHR MAC CE may further include at least one field included in the PHR MAC CE illustrated in FIGS. 9 to 14 in addition to the above-described field(s). A first MPE P-MPR pool (e.g., a first SRS resource set associated with the first MPE P-MPR pool) may be associated with a first panel of the terminal, and a second MPE P-MPR pool (e.g., a second SRS resource set associated with the second MPE P-MPR pool) may be associated with a second panel of the terminal.

[0191] The terminal can determine a first MPE value corresponding to a P-MPR value for satisfying MPE requirements within a first MPE P-MPR pool based on a measurement result of a signal (e.g., SSB and / or CSI-RS) received via a first panel. The P-MPR value for satisfying MPE requirements may be equal to or greater than mpe-Threshold. The P-MPR value for satisfying MPE requirements may have a change equal to or greater than phr-Tx-PowerFactorChangedB. The terminal can check an SSBRI and / or CRI associated with a P-MPR value corresponding to the first MPE value. The terminal can determine a second MPE value corresponding to a P-MPR value for satisfying MPE requirements within a second MPE P-MPR pool based on a measurement result of a signal (e.g., SSB and / or CSI-RS) received via a second panel. The P-MPR value for satisfying MPE requirements may be equal to or greater than mpe-Threshold. The P-MPR value to satisfy the MPE requirements may have a change greater than phr-Tx-PowerFactorChangedB. The terminal may check the SSBRI and / or CRI associated with the P-MPR value corresponding to the second MPE value. The MPE requirements for each panel of the terminal may be the same or different. The MPE requirements may be independently set for each panel of the terminal. The MPE requirements for the panels of the terminal may be included in the signaling message of S1510.

[0192] The terminal can transmit a PHR MAC CE (e.g., an MPE P-MPR report) to the base station (S1540). The PHR MAC CE can be transmitted through multiple panels of the terminal or through one panel of the terminal. The base station can receive the PHR MAC CE from the terminal (S1540). The base station can check information included in the PHR MAC CE (e.g., a first MPE value, an SSBRI or CRI associated with the first MPE value, a second MPE value, and / or an SSBRI or CRI associated with the second MPE value). For example, the base station can check the MPE for each panel of the terminal and the SSBRI or CRI associated with the MPE based on the information included in the PHR MAC CE. The base station can schedule transmission (e.g., UL transmission and / or DL ​​transmission) for the terminal based on the checked information.

[0193] In the above-described embodiments, the method of MPE reporting (e.g., MPE P-MPR reporting) can be configured per terminal or per panel of the terminal. Two SRS resource sets for a single DCI-based SDM (spatial division multiplexing) method or a single DCI-based SFN method can be configured. The DCI (e.g., DCI format 0_1, DCI format 0_2) can include an SRS resource set indicator, a second SRI (SRS resource indicator) field, and a TPMI (transmit precoding matrix indicator) field. The above-described embodiments can be applied to CB (codebook)-based UL transmission and / or NCB (non-codebook)-based UL transmission. The above-described embodiments can be applied identically or similarly to the PHR reporting procedure for STxMP UL transmission.

[0194] The operations 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 that stores information readable by a computer system. Furthermore, a computer-readable recording medium can be distributed across network-connected computer systems, allowing the computer-readable program or code to be stored and executed in a distributed manner.

[0195] Additionally, the computer-readable recording medium may include hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, etc. The program instructions may include not only machine language codes produced by a compiler, but also high-level language codes that can be executed by a computer using an interpreter, etc.

[0196] While some aspects of the present disclosure have been described in the context of a device, they may also represent a description of 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 as 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 or more of the most significant method steps may be performed by such a device.

[0197] 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 the present disclosure. The field-programmable gate array may operate in conjunction with a microprocessor to perform one of the methods described in the present disclosure. In general, the methods are preferably performed by some hardware device.

[0198] Although the present disclosure has been described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various modifications and changes may be made to the present disclosure without departing from the spirit and scope of the present disclosure as set forth in the claims below.

Claims

1. As a method of UE (user equipment), A step of receiving a signaling message including information required for MPE (maximum permissible exposure) P-MPR (power management-maximum power reduction) reporting from a base station; If a triggering condition of the MPE P-MPR report is satisfied, generating the MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field; and Comprising the step of transmitting the above MPE P-MPR report to the base station, UE's method.

2. In claim 1, The signaling message includes at least one of information of a first MPE P-MPR pool associated with the first panel, information of a second MPE P-MPR pool associated with the second panel, or information on the relationship between sets of sounding reference signal (SRS) resources and MPE P-MPR pools. UE's method.

3. In claim 2, The first MPE P-MPR pool is associated with a first SRS resource set among the SRS resource sets, and the second MPE P-MPR pool is associated with a second SRS resource set among the SRS resource sets. UE's method.

4. In claim 2, Each of the first MPE P-MPR pool and the second MPE P-MPR pool includes a range for P-MPR values, and the range for the P-MPR values ​​in the first MPE P-MPR pool is set to be the same as or different from the range for the P-MPR values ​​in the second MPE P-MPR pool. UE's method.

5. In claim 2, A step of determining a value of the first MPE field corresponding to a first P-MPR value for satisfying an MPE requirement within the first MPE P-MPR pool based on a measurement result of a signal received through the first panel; and Further comprising a step of determining a value of the second MPE field corresponding to a second P-MPR value for satisfying the MPE requirement within the second MPE P-MPR pool based on a measurement result of a signal received through the second panel. UE's method.

6. In claim 5, If at least one of the first P-MPR value or the second P-MPR value is greater than or equal to the threshold, the MPE P-MPR report is triggered. UE's method.

7. In claim 5, If at least one of the change in the first P-MPR value or the change in the second P-MPR value is greater than or equal to a threshold, the MPE P-MPR report is triggered. UE's method.

8. In claim 1, Each of the first resource indicator and the second resource indicator is a synchronization signal block resource indicator (SSBRI) or a channel state information-reference signal (CSI-RS) resource indicator (CRI). UE's method.

9. In claim 1, The above UE and the above base station support STxMP (simultaneous transmission across multiple panels) UL (uplink) transmission. UE's method.

10. As a method of base station, A step of transmitting a signaling message including information required for MPE (maximum permissible exposure) P-MPR (power management-maximum power reduction) reporting to UE (user equipment); and If a triggering condition of the MPE P-MPR report is satisfied, a step of receiving an MPE P-MPR report from the UE, the MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field, Method of base station.

11. In claim 10, The signaling message includes at least one of information of a first MPE P-MPR pool associated with the first panel, information of a second MPE P-MPR pool associated with the second panel, or information on the relationship between sets of sounding reference signal (SRS) resources and MPE P-MPR pools. Method of base station.

12. In claim 11, The first MPE P-MPR pool is associated with a first SRS resource set among the SRS resource sets, and the second MPE P-MPR pool is associated with a second SRS resource set among the SRS resource sets. Method of base station.

13. In claim 11, Each of the first MPE P-MPR pool and the second MPE P-MPR pool includes a range for P-MPR values, and the range for the P-MPR values ​​in the first MPE P-MPR pool is set to be the same as or different from the range for the P-MPR values ​​in the second MPE P-MPR pool. Method of base station.

14. In claim 10, Each of the first resource indicator and the second resource indicator is a synchronization signal block resource indicator (SSBRI) or a channel state information-reference signal (CSI-RS) resource indicator (CRI). Method of base station.

15. In claim 10, The above base station and the UE support STxMP (simultaneous transmission across multiple panels) UL (uplink) transmission. Method of base station.

16. As a UE (user equipment), Contains at least one processor, At least one processor of the UE, Receive a signaling message from a base station including information required for MPE (maximum permissible exposure) P-MPR (power management-maximum power reduction) reporting; If a triggering condition of the above MPE P-MPR report is satisfied, generating the MPE P-MPR report including a first MPE field associated with a first panel of the UE, a first resource indicator associated with the first MPE field, a second MPE field associated with a second panel of the UE, and a second resource indicator associated with the second MPE field; and Causing the above MPE P-MPR report to be transmitted to the above base station, UE.

17. In claim 16, The signaling message includes at least one of information of a first MPE P-MPR pool associated with the first panel, information of a second MPE P-MPR pool associated with the second panel, or information on the relationship between sets of sounding reference signal (SRS) resources and MPE P-MPR pools. UE.

18. In claim 17, At least one processor of the UE, Determine a value of the first MPE field corresponding to a first P-MPR value for satisfying an MPE requirement within the first MPE P-MPR pool based on a measurement result of a signal received through the first panel; and Further causing the second MPE field to be determined based on the measurement result of the signal received through the second panel, corresponding to a second P-MPR value for satisfying the MPE requirement within the second MPE P-MPR pool. UE.

19. In claim 18, If at least one of the first P-MPR value or the second P-MPR value is greater than or equal to the threshold, the MPE P-MPR report is triggered. UE.

20. In claim 18, If at least one of the change in the first P-MPR value or the change in the second P-MPR value is greater than or equal to a threshold, the MPE P-MPR report is triggered. UE.

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