Terminal device, network device, and method

Abstract

Embodiments of the present disclosure relate to a communication method, apparatus, and computer-readable medium. A terminal device receives a first setting for SRS transmission and a second setting for PUSCH transmission. When a first indication indicating a TCI state and a second indication indicating PC information are received, the terminal device determines one of the first indication and the second indication for use in the PC, and determines a first transmission power for the PUSCH transmission based on the first setting and the second setting and the one of the first indication and the second indication. In this way, UL PC within the integrated TCI framework is realized.

Description

Technical Field

[0001] Exemplary embodiments of the present disclosure relate generally to the field of telecommunications, and more particularly to a method, apparatus, and computer-readable storage medium for communication for uplink (UL) power control (PC) for a multi-transmission reception point (MTRP).

Background Art

[0002] Currently, it has been proposed to define an extension of the integrated transmission configuration indicator (TCI) framework for multi-downlink (DL) and UL TCI state indication focusing on the MTRP use case. Also, it has been proposed to study PC for UL single downlink control information (DCI) for MTRP operations assuming an extension of the integrated TCI framework. Furthermore, two power limitation assumptions for simultaneous transmission across multi-panels (STxMP), namely, power limitation per panel for STxMP and total power limitation per user equipment (UE) across all UE panels used for STxMP, have been discussed. However, how to perform UL PC for these scenarios is still incomplete and needs further study.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Overall, exemplary embodiments of the present disclosure provide a method, apparatus, and computer storage medium for communication for UL PC for MTRP.

Means for Solving the Problems

[0004] In a first aspect, a communication method is provided. The method includes, at a terminal device, receiving a first setting for sounding reference signal (SRS) transmission and a second setting for physical uplink shared channel (PUSCH) transmission, determining, according to a determination that a first indication indicating an active TCI state and a second indication indicating power control information are received, one of the first indication and the second indication for use in power control, and determining a first transmission power for the PUSCH transmission based on the first setting and the second setting and one of the first indication and the second indication.

[0005] In a second aspect, a communication method is provided. The method includes, at a network device, transmitting a first setting for SRS transmission and a second setting for PUSCH transmission, transmitting a first indication indicating an active TCI state and a second indication indicating power control information, and receiving the PUSCH transmission transmitted with the first transmission power determined based on the first setting and the second setting and one of the first indication and the second indication.

[0006] In a third aspect, a communication method is provided. The method includes, in a terminal device provided with a first panel and a second panel, receiving an instruction for simultaneous transmission on the first panel and the second panel; determining a first transmission power for uplink transmission based on at least one power limit for the first panel and the second panel; determining a second transmission power for reference signal transmission based on the at least one power limit, the first transmission power, and a ratio of power-related parameters of the uplink transmission and the reference signal transmission, the ratio being determined based on the at least one power limit; and performing the uplink transmission with the first transmission power and performing the reference signal transmission with the second transmission power.

[0007] In a fourth aspect, a communication device is provided. The device includes a processor configured to execute the method according to the first, second, or third aspect of the present disclosure.

[0008] In a fifth aspect, a computer-readable medium storing instructions is provided. When the instructions are executed on at least one processor, the at least one processor is caused to execute the method according to the first, second, or third aspect of the present disclosure.

[0009] It should be understood that the summary section of the invention is not intended to identify key or essential features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure should be readily understandable from the following description.

Brief Description of the Drawings

[0010] Some embodiments of the present disclosure will be described in more detail in the accompanying drawings to further clarify the above and other objects, features, and advantages of the present disclosure.

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[0025] In the figure, the same or similar reference numerals represent the same or similar elements.

DETAILED DESCRIPTION OF THE INVENTION

[0026] Here, the principles of the present disclosure will be explained with reference to some embodiments. It should be understood that these embodiments are described for illustrative purposes only and are intended to assist those skilled in the art in understanding and implementing the present disclosure, and do not imply any limitation on the scope of the present disclosure. The disclosure described herein can be implemented in various ways different from the methods described below.

[0027] In the following description and claims, unless otherwise defined, all technical and scientific terms used herein shall have the same meaning as commonly understood by those skilled in the art of the present disclosure.

[0028] As used herein, the term "terminal device" refers to any device having wireless or wired communication capabilities. Examples of terminal devices include user equipment (UE), personal computers, desktops, mobile phones, cellular phones, smartphones, personal digital assistants (PDAs), portable computers, tablets, wearable devices, internet of things (IoT) devices, ultra-reliable and low latency communications (URLLC) devices, internet of everything (IoE) devices, machine type communication (MTC) devices, in-vehicle devices for vehicle-to-everything (V2X) communication where X means a pedestrian, a vehicle, or infrastructure / network, devices for integrated access and backhaul (IAB), small data transmission (SDT), mobility, multicast and broadcast services (MBS), positioning, dynamic / flexible duplexing in commercial networks, reduced capability (RedCap), satellite and unmanned aircraft system (UAS) including high altitude platform (HAP) in non-terrestrial network (NTN) such as satellite-mounted vehicles or aircraft-mounted vehicles, extended reality (XR) devices including different types of reality such as augmented reality (AR), mixed reality (MR), virtual reality (VR), unmanned aerial vehicles (UAV) commonly referred to as drones which are aircraft without human pilots, high speed trains (HST: high speeddevices on a train), or image acquisition devices such as digital cameras, sensors, game devices, music storage and playback devices, or Internet devices that enable wireless or wired Internet access and browsing, etc., including but not limited to these. The "terminal device" can further have a multicast / broadcast function and support public safety, mission-critical, V2X applications, transparent IPv4 / IPv6 multicast delivery, IPTV, smart TV, wireless services, wireless software delivery, group communication, and IoT applications. Also, one or more subscriber identity modules (SIMs), known as multi-SIM, may be incorporated. The term "terminal device" may be used interchangeably with UE, mobile station, subscriber station, mobile terminal, user terminal, or wireless device.

[0029] The term "network device" means a device that can provide or host a cell or coverage with which a terminal device can communicate. Examples of network devices include, but are not limited to, Node B (NodeB or NB), evolved Node B (eNodeB or eNB), next-generation Node B (gNB), transmission reception point (TRP), remote radio unit (RRU), radio head (RH), remote radio head (RRH), IAB node, femto node, pico node and other low-power nodes, reconfigurable intelligent surface (RIS), network control repeater, etc.

[0030] The terminal device or network device may have the ability of artificial intelligence (AI) or machine learning. Generally, it includes a trained model from a large number of data collected for a specific function and can be used to predict some information.

[0031] The terminal device or network device may operate, for example, on several frequency ranges such as FR1 (410 MHz to 7125 MHz), FR2 (24.25 GHz to 71 GHz), frequency bands greater than 100 GHz, and terahertz (THz). Furthermore, it can operate on licensed / unlicensed / shared spectrum. The terminal device may have two or more connections with the network device under a multi-radio dual connectivity (MR-DC) application scenario. The terminal device or network device can operate in full-duplex, flexible-duplex, and cross-split duplex modes.

[0032] The network device may have functions of network energy saving, self-organizing networks (SON) / minimization of drive tests (MDT). The terminal may have a power-saving function.

[0033] Embodiments of the present disclosure may be implemented in test equipment such as, for example, signal generators, signal analyzers, spectrum analyzers, network analyzers, test terminal devices, test network devices, channel emulators, etc.

[0034] Embodiments of the present disclosure may be executed according to any generation of communication protocols known currently or developed in the future. Examples of communication protocols include, but are not limited to, the first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G) communication protocols, 5.5G, 5G-Advanced networks, or sixth generation (6G) networks.

[0035] In one embodiment, the terminal device may be connected to a first network device and a second network device. One of the first network device and the second network device may be a master node and the other may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs). In one embodiment, the first network device may be a first RAT device, and the second network device may be a second RAT device. In one embodiment, the first RAT device is an eNB and the second RAT device is a gNB. Information regarding different RATs may be transmitted from at least one of the first network device or the second network device to the terminal device. In one embodiment, the first information may be transmitted from the first network device to the terminal device, and the second information may be transmitted from the second network device directly or via the first network device to the terminal device. In one embodiment, information regarding the settings of the terminal device set by the second network device may be transmitted from the second network device via the first network device. Information regarding the resetting of the terminal device set by the second network device may be transmitted from the second network device directly or via the first network device to the terminal device.

[0036] As used herein, the singular forms "a", "an", and "the" include the plural forms as well, unless the context clearly dictates otherwise. The terms "comprising" and variations thereof should be construed as non-limiting terms meaning "including, but not limited to". The term "based on" should be construed as "at least partially based on". The terms "one embodiment" and "embodiment" should be construed as "at least one embodiment". The term "another embodiment" should be construed as "at least one other embodiment". Terms such as "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may be included hereinafter.

[0037] In some examples, a value, procedure, or device is referred to as "best", "lowest", "highest", "minimum", "maximum", etc. Such descriptions are intended to indicate that a selection can be made from among many available functional alternatives, and it should be understood that such a selection need not be better, smaller, higher, or otherwise more preferred than other selections.

[0038] As described above, how to perform UL PC within the integrated TCI framework for MTRP is still incomplete, and how to perform UL PC for STxMP considering different power limit assumptions is also still incomplete.

[0039] In view of this, embodiments of the present disclosure provide a communication solution for UL PC to solve the above and other potential problems. In one solution, when a terminal device receives an indication indicating an active TCI state (e.g., a TCI field in DCI) and another indication indicating PC information (e.g., an SRS resource indicator (SRI) field in another DCI), the terminal device determines one of the first indication and the second indication for use in the PC. In this way, it is possible to achieve an appropriate UL power decision.

[0040] In another solution, in response to receiving an STxMP instruction, a terminal device provided with a plurality of panels determines transmission power for uplink transmission (for convenience, also referred to as first transmission power in this specification) based on at least one power limit for the plurality of panels. Further, the terminal device determines a ratio of power-related parameters between the uplink transmission and the reference signal transmission based on the at least one power limit, and determines transmission power for the reference signal transmission (for convenience, also referred to as second transmission power in this specification) based on the ratio, the at least one power limit, and the transmission power for the uplink transmission. Also, the terminal device performs the uplink transmission with the first transmission power and the reference signal transmission with the second transmission power. In this way, it is possible to correctly determine UL power and to achieve appropriate UL power control.

[0041] Hereinafter, with reference to the accompanying drawings, the principles and embodiments of the present disclosure will be described in detail.

[0042] In the present disclosure, some terms may refer to the same or similar physical meanings and may be used interchangeably. Some exemplary examples are given below. · The terms "port used for uplink transmission", "port used for PUSCH transmission", "port having non-zero PUSCH transmission power", and "port having non-zero uplink transmission power" may be used interchangeably. · The terms "panel used for uplink transmission", "panel used for PUSCH transmission", "panel having non-zero PUSCH transmission power", and "panel having non-zero uplink transmission power" may be used interchangeably. · The terms "transmission capability information", "UE capability information", "capability-related information", "capability value set", "panel information", and "panel-related information" may be used interchangeably. · The terms "precoder", "precoding", "precoding matrix", "beam", "spatial relation information", "spatial relation info", "precoding information", "precoding information and number of layers", "precoding matrix indicator (PMI: precoding matrix indicator)", "precoding matrix indicator", "transmission precoding matrix indication", "precoding matrix indication", "TCI state", "transmission configuration indicator", "quasi co-location (QCL)", "quasi co-location", "QCL parameter", "QCL assumption", "QCL relation" and "spatial relation" may be used interchangeably. · The terms "single TRP", "single TCI state", "single TCI", "S-TCI", "single control resource set (CORESET)", "single CORESET pool", "S-TRP" and "S-TCI state" may be used interchangeably. · The terms "multiple TRP", "multiple TCI states", "multiple CORESETs", "multiple control resource set pools", "multi-TRP", "multiple TCI states", "multiple TCIs", "multi-CORESET" and "multiple control resource set pools", "MTRP" and "M-TCI", "M-TPR" may be used interchangeably. · The terms "resource", "resource within a resource set", "resource set" may be used interchangeably. · The terms "group", "subset" and "set" may be used interchangeably. · Further, one panel described in this specification refers to one or more antenna elements provided in a certain area of a terminal device. The panel described in this specification may refer to a downlink panel, an uplink panel, a panel type, a panel status, a set of capability values, a reference signal (RS) resource, an RS resource set, an antenna port, an antenna port group, a beam, a beam group. In this regard, the terms (and their equivalent expressions) "panel", "panel type", "antenna port set", "antenna element", "antenna array" may be used interchangeably. · Further, the panel information described in this specification may refer to a UE panel index / identification information (ID:identification), a downlink panel ID, an uplink panel ID, a panel type indication, a panel status indication, a set of capability value indexes, an RS resource ID, an RS resource set ID, an antenna port ID, an antenna port group ID, a beam ID, a beam group ID. The term "per panel" may be used interchangeably with "per capability value index", "per set of capability value indexes", "per RF chain", "per Tx RF chain", "per branch", "per Tx branch", etc. · As used in this specification, the term "TRP" means an antenna array (having one or more antenna elements) available by a network device located at a specific geographical location. Although some embodiments of the present disclosure have been described with reference to an example of a multi-TRP scenario (or a single-TRP scenario), these embodiments are for illustrative purposes only, to help those skilled in the art understand and implement the present disclosure, and do not imply any limitation on the scope of the present disclosure. It should be understood that the content of the present disclosure described in this specification can be implemented in various ways different from the methods described below. · As used herein, the term "SRS transmission" refers to the transmission of an SRS resource identified by an SRS signal resource indicator (SRI) in a DCI message for uplink grant. Thus, the term "latest SRS transmission" refers to the latest transmission of an SRS resource identified by the SRI in a DCI message for uplink grant. · As used herein, the term "network" / "network device" refers to one or more network devices. Thus, the terms "network", "network device" and "one or more network devices" may be used interchangeably. · "Panel with lower capabilities" may be used interchangeably with "panel with higher capabilities", "panel corresponding to a lower / higher capability value set index", "last used panel", "[old] panel used in initial access / minimum PRACH", etc. In other words, it can be any predefined rule known to both the NW side and the UE side, or may be signaled to each other by the NW / UE through configuration / capability reporting / request. · "BWP ID / index" may be used interchangeably with "BWP / CC ID / index", "CC identity / index", "cell identity / index", "physical cell identity / index", and "serving cell identity / index".

[0043] Examples of communication environments FIG. 1A shows an exemplary communication network 100A in which embodiments of the present disclosure can be implemented. The communication network 100A includes network devices 110-1 and optionally network device 110-2 (collectively or individually referred to as network device 110). The network device 110 may provide services to the terminal device 120. For the sake of explanation, the network device 110-1 is referred to as the first network device 110-1, and the network device 110-2 is referred to as the second network device 110-2. Further, the first network device 110-1 and the second network device 110-1 may communicate with each other.

[0044] In the communication network 100A, the link from the network device 110 (e.g., the first network device 110-1 or the second network device 110-2) to the terminal device 120 is referred to as a downlink, and the link from the terminal device 120 to the network device 110 (e.g., the first network device 110-1 or the second network device 110-2) is referred to as an uplink. In the downlink, the first network device 110-1 or the second network device 120-1 is a transmitting (TX) device (or transmitter), and the terminal device 120 is a receiving (RX) device (or receiver). In the uplink, the terminal device 120 is a transmitting TX device (or transmitter), and the first network device 110-1 or the second network device 110-2 is an RX device (or receiver).

[0045] In some embodiments, the network device 110 and the terminal device 120 may communicate using a direct link / channel.

[0046] In some embodiments, the terminal device 120 may be provided with two or more panels. As shown in FIG. 1A, the terminal device 120 is provided with panels 125-1 and 125-2. Hereinafter, the panels 125-1 and 125-2 may be referred to as the first panel 125-1 and the second panel 125-2, respectively.

[0047] In some embodiments, the first panel 125-1 and the second panel 125-2 correspond to different sets of antenna ports / antenna elements / antenna arrays. As one specific example, the first panel 125-1 corresponds to a first set of antenna ports, and the second panel 125-2 corresponds to a second set of antenna ports. In some embodiments, the panels 125-1 and 125-2 may each correspond to different sets of capability values.

[0048] In the communication network 100A, it is possible to support PUSCH STxMP. Specifically, the terminal device 120 may perform PUSCH simultaneously on both the panels 125-1 and 125-2.

[0049] In some embodiments, it is also possible to support MTRP transmission. As shown in FIG. 1A, the terminal device 120 may communicate with two TRPs, namely, TRP 130-1 and 130-2 (collectively or individually referred to as TRP 130). For the sake of explanation, TRP 130-1 is referred to as the first TRP 130-1, and TRP 130-2 is referred to as the second TRP 130-2.

[0050] Furthermore, in order to support MTRP and / or multi-panel, the network device 110 may be provided with one or more TRPs. For example, the network device 110 may be coupled to a plurality of TRPs at different geographical locations in order to achieve better coverage. In one specific exemplary embodiment, the first network device 110-1 includes the first TRP 130-1 and the second TRP 130-2. Alternatively, in another specific exemplary embodiment, the first network device 110-1 and the second network device 110-2 each include the first TRP 130-1 and the second TRP 130-2.

[0051] In some embodiments, the first TRP 130-1 and the second TRP 130-2 are associated with different control resource set pools (CORESET pools). For example, the first TRP 130-1 is associated with the first control resource set pool, and the second TRP 130-2 is associated with the second control resource set pool.

[0052] Furthermore, both single-TRP mode transmission and MTRP transmission may be supported by the specific example of FIG. 1A. Specifically, in the case of the single-TRP mode, the terminal device 120 communicates with the network via the first TRP 130-1 / the second TRP 130-2. Alternatively, in the case of the MTRP mode, the terminal device 120 communicates with the network via both the first TRP 130-1 and the second TRP 130-2.

[0053] As a specific exemplary embodiment, during PUSCH STxMP, the terminal device 120 simultaneously communicates with the first TRP 130-1 via the panel 125-1 and communicates with the second TRP 130-2 via the panel 125-2.

[0054] Furthermore, the network device 110 may provide one or more serving cells, and the first TRP 130-1 and the second TRP 130-2 may be included in the same serving cell or different serving cells. In other words, both inter-cell transmission and intra-cell transmission are supported by the specific example of FIG. 1A.

[0055] FIG. 1B shows an exemplary scenario of the communication network 100A shown in FIG. 1A. In the specific example of FIG. 1B, the first TRP 130-1 and the second TRP 130-2 are included in the same serving cell 140. In this case, MTRP transmission is performed as intra-cell transmission.

[0056] FIG. 1C shows another exemplary scenario of the communication network 100A shown in FIG. 1A. In the specific example of FIG. 1C, the first TRP 130-1 and the second TRP 130-2 are included in different serving cells 140-1 and 140-2. In this case, the MTRP transmission is performed as inter-cell transmission.

[0057] Communications in the communication network 100A may comply with any suitable standard including, but not limited to, Long Term Evolution (LTE), LTE Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA (registered trademark)), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM) for mobile communications. Further, the communications may be performed according to any generation of communication protocol known currently or developed in the future. Examples of communication protocols include, but are not limited to, the first generation (1G), second generation (2G), 2.5G, 2.75G, third generation (3G), fourth generation (4G), 4.5G, fifth generation (5G), 5.5G, 5G-Advanced network, or sixth generation (6G) communication protocol.

[0058] It should be understood that the number of elements (i.e., the terminal device 120, the panel 125, the network device 110, the TRP 130, and the cell 140) and their connection relationships and types as shown in FIGS. 1A to 1C are used for illustrative purposes only and do not imply any limitation. The communication network 100A may comprise any suitable number of elements suitable for implementing embodiments of the present disclosure.

[0059] As is well known, the integrated TCI state may provide a reference signal (RS) to determine the QCL relationship, Tx beam, Uplink-powerControl, and path loss reference signal (PL RS). The type of integrated TCI state may include DL and UL, respectively or jointly. Alternatively, the type of integrated TCI state may include DLorJoint and UL. Uplink-powerControl may further provide power control parameter settings, for example, P0, alpha, and closedLoopIndex for each of PUSCH, PUCCH, and SRS.

[0060] In some embodiments, the terminal device 120 may receive DCI including a TCI field indicating a plurality of TCI states from the network device 110. The plurality of TCI states may be associated with respective CORESETs or CORESET groups or search space sets (i.e., respective TRPs). Each TCI state may provide UL power control parameter settings and PL RS. Alternatively, each TCI state may not provide UL power control parameter settings and PL RS. In this case, it is unclear how to select one TCI state from the plurality of TCI states, and it is also unclear how to determine the applicable power control parameter settings and / or PL RS when they are not provided.

[0061] In some scenarios, the terminal device 120 may receive, from the network device 110, settings for PUSCH transmission including a power control adjustment state for PUSCH transmission. In some scenarios, the terminal device 120 may receive, from the network device 110, settings for SRS transmission including a power control adjustment state for an SRS resource set. In some embodiments, the TCI state may be applied to the SRS resource. In some embodiments, the TCI state may not be applied to the SRS resource. In some embodiments, the RRC information element (IE) UseIndicatedTCIState may be provided for the SRS resource set. In some embodiments, the RRC IE UseIndicatedTCIState may not be provided for the SRS resource set. In some embodiments, the power control adjustment state for the SRS resource set may be the same as the power control adjustment state for PUSCH transmission. In some embodiments, the power control adjustment state for the SRS resource set may be different from the power control adjustment state for PUSCH transmission. In this case, it is unclear how to determine the UL power for SRS transmission.

[0062] In the case of PRACH transmission, the TCI field may not be included in the PDCCH order (DCI format 1-0) that triggers the PRACH transmission. In this case, it is also unclear how to determine the UL power for PRACH transmission.

[0063] In some scenarios, the terminal device 120 may receive, from the network device 110, a DCI including one or more SRI fields indicating one or more power control settings. The power control settings may provide, for each TRP, a Tx power and a Tx beam or precoder. The power control settings may be the same as, or different from, the power control settings provided via the integrated TCI framework.

[0064] FIG. 1D is a diagram showing an exemplary scenario 100D of PC-related settings in which embodiments of the present disclosure can be implemented. In the example of FIG. 1D, at timing T1, the terminal device may receive settings for PUSCH transmission, including one or more power control settings (e.g., SRI-PUSCH-PowerControl).

[0065] As shown in FIG. 1D, at timing T2, the terminal device may receive DCI for beam indication change of the beam, and the DCI includes one or more TCI fields. As indicated by reference numeral 151, the one or more TCI fields may indicate a first TCI state and a second TCI state. The first TCI state may include a first UL PC parameter setting, a first PL RS, and a first Tx beam. The first Tx power may be determined based on the first UL PC parameter setting and the first PL RS. The first PUSCH transmission may be transmitted to a first TPR based on the first Tx power and the first Tx beam. The second TCI state may include a second UL PC parameter setting, a second PL RS, and a second Tx beam. The second Tx power may be determined based on the second UL PC parameter setting and the second PL RS. The second PUSCH transmission may be transmitted to a second TPR based on the second Tx power and the second Tx beam.

[0066] Continuing to refer to FIG. 1D, at timing T3, the terminal device may receive DCI that schedules PUSCH transmission at timing T4, and the DCI includes one or more SRI fields. The SRI field may indicate one power control setting (e.g., SRI-PUSCH-PowerControl) included in the setting of the PUSCH transmission. As indicated by reference numeral 152, the one or more SRI fields may include a first SRI indicating the first SRI-PUSCH-PowerControl and the first SRS resource, and a second SRI indicating the SRI-PUSCH-PowerControl and the second SRS resource. The first SRI-PUSCH-PowerControl may include a first UL PC parameter setting and a first PL RS. The first SRS resource may indicate a first Tx beam and a first Tx precoder. The first Tx power may be determined based on the first UL PC parameter setting and the first PL RS. The first PUSCH transmission may be transmitted to the first TPR based on the first Tx power, the first Tx beam, and the first Tx precoder. The second SRI-PUSCH-PowerControl may include a second UL PC parameter setting and a second PL RS. The second SRS resource may indicate a second Tx beam and a second Tx precoder. The second Tx power may be determined based on the second UL PC parameter setting and the second PL RS. The second PUSCH transmission may be transmitted to the second TPR based on the second Tx power, the second Tx beam, and the second Tx precoder.

[0067] In this case, it is unknown whether the PUSCH transmission at timing T4 is executed based on the procedure indicated by reference numeral 151 or 152.

[0068] Furthermore, due to different power limit assumptions, it may be necessary to update the impact of the maximum power according to the UE power class on the UL PC. Furthermore, the boosting of DMRS power and PTRS power are all based on the "unused power" on those resource elements (REs) that are not used for data transmission. However, in STxMP, due to different power limit assumptions, those "unused powers" may or may not be available for boosting DMRS power and PTRS power.

[0069] In view of this, embodiments of the present disclosure provide a communication solution for UL PC to solve the above and other potential problems. Referring to FIGS. 2 to 4, these solutions will be described below. FIGS. 2 and 4 are schematic diagrams of communication processes according to some exemplary embodiments of the present disclosure. For the sake of explanation, these processes will be described with reference to FIGS. 1A to 1C.

[0070] Each of these processes may involve a terminal device 120, a network device 110 (either or both of the first network device 110-1 and the second network device 110-2), and optionally, a TRP 130 (including the first TRP 130-1 and the second TRP 130-2). In other words, the implementation of some embodiments does not depend on the TRP 130. The terminal device 120 may be provided with a first panel 125-1 and a second panel 125-2. Furthermore, the first panel 125-1 corresponds to the first set of antenna ports, and the second panel 125-2 corresponds to the second set of antenna ports.

[0071] Furthermore, the first TRP 130-1 is connected to the first network device 110-1, and the second TRP 130-2 is connected to the first network device 110-1 / the second network device 110-2. Furthermore, the first TRP 130-1 and the second TRP may be in the same serving cell or in different serving cells.

[0072] In the following text, some embodiments of the present disclosure will be described with reference to two TRPs and two panels. However, these embodiments are for illustrative purposes only, to assist those skilled in the art in understanding and implementing the present disclosure, and do not imply any limitation on the scope of the present disclosure. It should be understood that the content of the present disclosure described herein can be implemented in various ways different from the methods described below.

[0073] Furthermore, it should be understood that the operations in the terminal device 120 and the network device 110 should be coordinated. In other words, the network device 110 and the terminal device 120 should have a common understanding regarding settings, parameters, etc. Such a common understanding may be achieved by any suitable interaction between the network device 110 and the terminal device 120, or by both the network device 110 and the terminal device 120 applying the same rules / policies. In the following, some operations will be described from the perspective of the terminal device 120, but it should be understood that the corresponding operations should be executed by the network device 110. Similarly, some operations will be described from the perspective of the network device 110, but it should be understood that the corresponding operations should be executed by the terminal device 120. For the sake of brevity, some parts of the same or similar content are omitted here.

[0074] Furthermore, in the following description, several interactions (e.g., exchange of capability-related information, resource / transmission setting / scheduling / activation, etc.) are executed between the terminal device 120 and the network device 110. It should be understood that the interaction may be realized within one signaling / message or multiple signaling / messages, including system information, radio resource control (RRC) messages, DCI, uplink control information (UCI), medium access control (MAC) control elements (CE), etc. The present disclosure is not limited in this regard.

[0075] In some embodiments, one or more interactions may be specific to a particular panel, TRP, capability value, CORESET, etc. Thus, it is possible to flexibly configure or activate PUSCH STxMP.

[0076] Also, although the features / operations have been described separately for specific exemplary embodiments, it should be understood that these features / operations described in different exemplary embodiments may be used in any suitable combination, unless there is an explicit contrary indication.

[0077] Exemplary embodiments of UL PC within the integrated TCI framework For the sake of illustration, first, some explanations about the integrated TCI framework and PL estimation are given as follows.

[0078] The integrated TCI for MTRP may include any of the following. · In the case of MTRP operation, within a component carrier (CC) / bandwidth part (BWP), up to four indicated TCI states · The indicated TCI state is updated by the necessary MAC-CE based TCI state activation by MAC-CE or DCI. · For the DL and / or UL MTRP operations in a CC / BWP, one of the following combinations with two sets of the indicated TCI states may be configured / provided to the UE. · One indicated combined TCI state + one indicated combined TCI state, · One pair of indicated DL and UL TCI states + one pair of indicated DL and UL TCI states, · One pair of indicated DL and UL TCI states + one indicated DL TCI state, · One pair of indicated DL and UL TCI states + one indicated UL TCI state, · One indicated combined TCI state + one pair of indicated DL and UL TCI states, · One indicated combined TCI state + one indicated DL TCI state, · One indicated combined TCI state + one indicated UL TCI state.

[0079] In the case of PL estimation based on PL RS, the path loss may be determined based on the following formula (1).

Equation

[0080] FIG. 2 is a schematic diagram of a communication process 200 for UL PC within an integrated TCI framework according to some exemplary embodiments of the present disclosure. For the sake of explanation, the process 200 will be described with reference to FIGS. 1A - 1C.

[0081] Referring to FIG. 2, the terminal device 110 may transfer UE capability information using the network device 120 (205). For example, the network device 120 may transmit radio resource control (RRC) settings regarding UE capability reporting to the terminal device 110. The terminal device 110 may report the capabilities of the terminal device 110 to the network device 120 based on the RRC settings.

[0082] In some embodiments, the UE capability report may include at least one of information regarding which signaling the UE supports with higher priority, information regarding whether the UE supports the setting of TCI state information used for PC, information regarding whether the UE supports default rules, or information regarding which default rules the UE supports. It should be understood that any other suitable capability report is also possible.

[0083] 1. UL PC for PUSCH transmission As shown in FIG. 2, the network device 110 transmits (210) a configuration for SRS transmission (for convenience, also referred to as SRS configuration or the first configuration herein) to the terminal device 120. In some embodiments, the SRS configuration may include two SRS resource sets. For example, the two SRS resource sets may be configured to have a parameter "usage" set to "noncodebook" or "codebook". It should be understood that the number of SRS resource sets is not limited to 2, and any other appropriate number is possible.

[0084] In some embodiments, the SRS configuration may include information on the TCI state used for PC (for convenience, also referred to as the first information herein). For example, each SRS resource set may be configured to have one upper layer parameter "UseIndicatedTCIState" or any other appropriate parameter having a similar function. The first information may be carried by the upper layer parameter "UseIndicatedTCIState" or any other appropriate parameter having a similar function.

[0085] In some embodiments, the first information may include the identity of the TCI state. For example, when two or more TCI states are active, for example, when two or more TCI states are indicated via the TCI field in DCI, the first information may include information regarding "using the first TCI state" and "using the second TCI state", or, overall, information regarding "which TCI state to use".

[0086] In some embodiments, the first information may include an association between an identity of an SRS resource set and an identity of a TCI state. In other words, the first information may be sorted by a mapping between an SRS resource set ID and a TCI state ID. For example, the first SRS resource set ID may be explicitly or implicitly associated with the first TCI state ID. Alternatively, two or more TCI states may be active based on other configuration / activation signaling, such as RRC or MAC CE, or based on a predefined rule (i.e., not limited to the case where the TCI state is indicated via the TCI field in DCI).

[0087] In some embodiments, the first information may include an association between an identity of an SRS resource set and an identity of a TRP or a CORESET or a CORESET group or a search space set, and an association between an identity of the TRP or the CORESET or the CORESET group or the search space set and an identity of a TCI state. In other words, the first information may include a configuration of an association between an SRS resource set and a TRP, for example, an association between an SRS resource set and a CORESET / CORESET group / search space set. When two or more TCI states are indicated, each of the TCI states should be associated with a different TRP, and the terminal device 120 may find "which TCI state to use" for each of the SRS resource sets.

[0088] In some embodiments, the first information includes a first value of a power control adjustment state, and the first value indicates a TCI state used for the PC. In other words, the first information may include a setting of a power control adjustment state (e.g., srs-PowerControlAdjustmentStates). The parameter "srs-PowerControlAdjustmentStates" may have different values, e.g., "sameAsFci1" and "sameAsFci2", or "sameAsFci2" and none, for two SRS resource sets. Alternatively, the parameter "srs-PowerControlAdjustmentStates" may be set to 0 and 1, respectively, for two SRS resource sets. For example, h_(b,f,c)(i,l)=f_(b,f,c)(i,l), where h_(b,f,c)(i,l) represents the SRS power control adjustment state and f_(b,f,c)(i,l) represents the current PUSCH power control adjustment state, and where l may take 0 and 1, respectively, for two SRS resource sets.

[0089] In some embodiments, the first information (e.g., useIndicatedTCIState) may be set for DL / UL channels including PDCCH / PDSCH / PUCCH / PUSCH. In some embodiments, the first information (e.g., useIndicatedTCIState) may be set for DL / UL reference signals including CSI-RS / SRS. In some embodiments, the first information (e.g., useIndicatedTCIState) may be set for DL / UL cells / BWPs / bands. In some embodiments, the first information (e.g., useIndicatedTCIState) may include more detailed information such as using the TCI state indicated to determine the QCL type A / B / C / D parameters, UL Tx beam, UL Tx power, PL RS, alpha, closedloopindex, P0, respectively.

[0090] Continuing to refer to FIG. 2, the network device 110 may transmit to the terminal device 120 a setting for PUSCH transmission (for convenience, also referred to as the second setting in this specification) (220). In some embodiments, the second setting may include one or more PC settings.

[0091] As shown in FIG. 2, the network device 110 transmits an indication indicating an active TCI state (for convenience, also referred to as the first indication in this specification) (230). For example, the network device 110 may transmit DCI for beam indication change, and the TCI field in the DCI may indicate the active TCI state. It should be understood that the first indication may be transmitted in any other suitable manner.

[0092] The network device 110 may also transmit an indication indicating PC information (for convenience, also referred to as the second indication in this specification) (240). For example, the network device 110 may transmit DCI for scheduling PUSCH transmission, and the SRI field in the DCI may indicate the PC setting. It should be understood that the second indication may be transmitted in any other suitable manner.

[0093] Alternatively, the terminal device 120 receives the first indication and the second indication. In this case, as shown in FIG. 2, the terminal device 120 may determine one of the first and second indications for use in the PC (250).

[0094] In some embodiments, the first indication (i.e., the TCI state) may have a higher priority than the second indication (i.e., the SRI). In some embodiments, the second indication (i.e., the SRI) may have a higher priority than the first indication (i.e., the TCI state). In this case, the terminal device 120 may determine one of the first and second indications based on the priorities of the first and second indications.

[0095] In some embodiments, the network device 110 is responsible for ensuring the same settings provided by the first and second instructions. In some embodiments, the terminal device 120 does not expect different PC settings to be provided by the first and second instructions. In some embodiments, the first and second instructions provide the same power control information. For example, the PC parameter settings and PL RS provided by the TCI state and the SRI in the DCI refer to the same parameter values, such as RS ID and estimated PL, and ultimately the same Tx power. In this case, the terminal device 120 may determine either the first or the second instruction.

[0096] In some embodiments, the first setting (i.e., SRS setting) includes the first information of the TCI state used for PC. In other words, the first information (e.g., UseIndicatedTCIState) must be set for the SRS resource set. In this case, the terminal device 120 may calculate the same power based on the first and second instructions. Alternatively, the terminal device 120 may calculate the power using the first instruction.

[0097] Continuing to refer to FIG. 2, the terminal device 120 may determine the transmission power of the PUSCH transmission (also referred to as the first transmission power for convenience) based on the first and second settings and one of the first and second instructions (260). In some embodiments, the timing relationship between the two DCIs and the application timing of the PL RS may be considered.

[0098] In some embodiments where the first instruction (i.e., TCI state) has a higher priority than the second instruction (i.e., SRI), the terminal device 120 may ignore the PC information indicated by the second instruction before the application timing of the PC information indicated by the first instruction. FIG. 3A is a diagram showing an exemplary scenario 300A of application timing according to some embodiments of the present disclosure.

[0099] In the example of FIG. 3A, at timing t1, the terminal device 120 may receive DCI for beam indication, and the DCI includes one or more TCI fields. At timing t2, the terminal device may receive DCI for scheduling PUSCH transmission at timing t3, and the DCI includes one or more SRI fields. In this case, the terminal device 120 may ignore the PC information indicated by the received SRI during t1 + applicable timing, where t1 represents the time when the DCI for beam indication change is received or the time when the reception of the DCI is confirmed, and the applicable timing represents signaling decoding timing, panel switching timing, beam application timing, PL RS application timing, PUSCH preparation timing, or any other appropriate timing, or any combination of the above timings, or the maximum of the above timings.

[0100] In some embodiments where the first indication (i.e., TCI state) has a higher priority than the second indication (i.e., SRI), the terminal device 120 may override the PC information indicated by the second indication with the PC information indicated by the first indication before the applicable timing of the PC information indicated by the second indication. FIG. 3B is a diagram showing another exemplary scenario 300B of applicable timing according to some embodiments of the present disclosure.

[0101] In the example of FIG. 3B, at timing t4, the terminal device may receive DCI that schedules PUSCH transmission at timing t6, and the DCI includes one or more SRI fields. At timing t5, the terminal device 120 may receive DCI for beam indication, and the DCI includes one or more TCI fields. In this case, even if it is before t4 + application time, the terminal device 120 may override the PC information indicated by the SRI with the PC information indicated by the TCI state, that is, during t4 + application timing, the PC information indicated by the SRI may be ignored, where t4 represents the time when the DCI for beam indication change is received or the time when the reception of the DCI is confirmed, and the application timing represents signaling decoding timing, panel switching timing, beam application timing, PL RS application timing, PUSCH preparation timing, or any other appropriate timing, or any combination of the above timings, or the maximum of the above timings.

[0102] In some embodiments where the second indication (i.e., SRI) has a higher priority than the first indication (i.e., TCI state), the terminal device 120 may ignore the PC information indicated by the first indication before the application timing of the PC information indicated by the second indication. FIG. 3C is a diagram showing another exemplary scenario 300C of application timing according to some embodiments of the present disclosure.

[0103] In the example of FIG. 3C, at timing t7, the terminal device 120 may receive DCI for beam indication, and the DCI includes one or more TCI fields. At timing t8, the terminal device may receive DCI for scheduling PUSCH transmission at timing t9, and the DCI includes one or more SRI fields. In this case, the terminal device 120 may override the PC information indicated by the TCI state with the PC information indicated by the SRI even if it is before t7 + application time, that is, during t10 + application timing, the PC information indicated by the TCI state may be ignored, where t7 represents the time point when the DCI for beam indication change is received or the time point when the reception of the DCI is confirmed, and the application timing represents the signaling decoding timing, panel switching timing, beam application timing, PL RS application timing, PUSCH preparation timing, or any other appropriate timing, or any combination of the above timings, or the maximum of the above timings.

[0104] In some embodiments where the second indication (i.e., SRI) has a higher priority than the first indication (i.e., TCI state), the terminal device 120 may override the PC information indicated by the first indication with the PC information indicated by the second indication before the application timing of the PC information indicated by the first indication. FIG. 3D is a diagram showing another exemplary scenario 300D of application timing according to some embodiments of the present disclosure.

[0105] In the example of FIG. 3D, at timing t10, the terminal device may receive DCI that schedules PUSCH transmission at timing t12, and the DCI includes one or more SRI fields. At timing t11, the terminal device 120 may receive DCI for beam indication change of the beam, and the DCI includes one or more TCI fields. In this case, the terminal device 120 may ignore the PC information indicated by the TCI state during t10 + application timing, where t10 represents the time when the DCI for beam indication change is received or the time when the reception of the DCI is confirmed, and the application timing represents signaling decoding timing, panel switching timing, beam application timing, PL RS application timing, PUSCH preparation timing, or any other appropriate timing, or any combination of the above timings, or the maximum of the above timings.

[0106] It should be understood that FIGS. 3A to 3D are merely examples and do not limit the present disclosure.

[0107] Based on the determined PC information (for example, PC parameter setting and PL RS), the terminal device 120 may calculate the transmission power of the PUSCH transmission. In some embodiments, when the terminal device 120 uses the parameter set setting with index j and the PUSCH power control adjustment state with index l to transmit PUSCH on the active UL BWP b of carrier f of serving cell c, the terminal device 120 may determine the PUSCH transmission power at the PUSCH transmission opportunity i as shown in the following formula (2).

Equation

[0108] It should be understood that Equation (2) is merely an example, and any other suitable method is also possible.

[0109] In this way, it is possible to eliminate the ambiguity in UL power determination.

[0110] 2. UL PC for SRS transmission Continuing to refer to Figure 2, the terminal device 120 may also determine the transmission power of SRS transmission (for convenience, also referred to as the second transmission power in this specification) (270).

[0111] In some embodiments where the first information is set or enabled, the terminal device 120 may determine the TCI state used for PC based on the first information and the first indication. That is, the terminal device 120 may select one of the active TCI states indicated by the first indication based on the explicit or implicit information of the TCI state in the first information. Also, the terminal device 120 may determine the transmission power of SRS transmission based on the PC information (e.g., PC parameter settings and PL RS) associated with the determined TCI state.

[0112] In some embodiments, the first information may not be set or activated. In this case, if an individual TCI state is set for the SRS resource, the transmission power may be determined based on the individual TCI state. If an individual TCI state is not set for the SRS resource, the transmission power may be determined based on some default rules described below.

[0113] In some embodiments, when the terminal device 120 transmits SRS on the active UL BWP b of the carrier f of the serving cell c using the SRS power control adjustment state having the index l, the terminal device 120 may determine the SRS transmission power at the SRS transmission opportunity i as shown in the following formula (3).

Number

[0114] It should be understood that formula (3) is only an example, and any other suitable method is also possible.

[0115] In this way, it becomes possible to achieve a rapid update regarding the UL transmission power when one or more UL beams are changed.

[0116] 3. UL PC for PRACH transmission Continuing to refer to FIG. 2, the terminal device 120 may also determine the transmission power of the PRACH transmission (for convenience, also referred to as the third transmission power in this specification) (280). In some embodiments, when the PRACH transmission power is determined, an integrated TCI state may be provided for reference signal power selection. In some embodiments, when two or more TCI states are active for the PDCCH carrying the PDCCH order, the PDCCH order may provide reference signal power selection information.

[0117] In some embodiments, the terminal device 120 may receive information (for convenience, also referred to as the second information in this specification) including at least one of the TCI state used for reference signal power determination or the TCI state used for PL RS determination from the network device 110 (281). Further, the terminal device 120 may determine the transmission power of the PRACH transmission (for convenience, also referred to as the third transmission power in this specification) based on the second information (282).

[0118] In some embodiments, when there are two or more active TCI states for the PDCCH providing the PDCCH order, the terminal device 120 expects that the PDCCH order provides information on which TCI state is used for reference signal power determination, for example, which RS the terminal device 120 uses when applying the value provided by powerControlOffsetSS. That is, the terminal device 120 expects that the PDCCH order provides information regarding to which TRP the PRACH is transmitted or which RS is used as the PL RS.

[0119] Such information may be indicated via an additional field within the PDCCH order. Alternatively, such information may be implicitly indicated via existing fields, such as a random access preamble index, an SS / PBCH index, or a PRACH mask index. The association between those indexes and the TRP needs to be preconfigured. In some embodiments, the second information may include the configuration of the association between those indexes and the TRP, for example, the association between those indexes and a CORESET / CORESET group / search space set. Alternatively, as will be described later, some default rules may be applied for selection.

[0120] In some embodiments, the terminal device 120 expects that the active TCI state for the PDCCH that provides the PDCCH order is associated with the PL RS, and the associated PL RS is used for PL estimation including reference signal power selection and RSRP measurement. In some embodiments, the terminal device 120 expects that the active TCI state for the PDCCH that provides the PDCCH order provides a QCL type RS that can be used for PL estimation. If the active TCI state is actually a pair of DL and UL TCI states, the terminal device 120 may apply the PL RS provided in the UL TCI state.

[0121] In some embodiments, if the TCI state used for reference signal power determination is associated with a cell different from the serving cell of the terminal device 120 (for convenience, also referred to as the first cell in this specification), the terminal device 120 may obtain the reference signal power (for example, ss-PBCH-BlockPower) from the first cell.

[0122] In some embodiments, when the terminal device 120 transmits a PRACH on the active UL BWP b of carrier f of the serving cell c, the terminal device 120 may determine the PRACH transmission power at the PRACH transmission opportunity i as shown in the following formula (4). [Number] Here, P PRACH,b,f,c (i) represents the PRACH transmission power, and P CMAX,f,c (i) represents the set maximum output power, and P PRACH,target,f,c represents the target power P, and PL b,f,c represents the estimated downlink path loss value (dB) calculated by the UE.

[0123] It should be understood that Equation (4) is just an example, and any other appropriate method is also possible.

[0124] In this way, it is possible to accurately calculate the PRACH transmission power.

[0125] 4. Default Rules for UL PC In some scenarios, the power control parameter settings may not be provided by the applied TCI state. In this case, the terminal device 120 may determine the power control parameter setting using the default rules.

[0126] In some embodiments, the terminal device 120 may determine the power control parameter setting based on the power control parameter setting associated with the TCI state including the power control setting ID. In other words, the terminal device 120 may determine the power control parameter setting based on another TCI state. For example, the terminal device 120 may determine the power control parameter setting based on the TCI state applied to the associated CORESET. As another example, the terminal device 120 may determine the power control parameter setting based on the TCI state applied to the CORESET having a specific ID, for example, the lowest ID or the lowest N IDs. As yet another example, the terminal device 120 may determine the power control parameter setting based on the TCI state having a specific ID, for example, the lowest ID or the lowest N IDs.

[0127] In some embodiments, the terminal device 120 may determine the power control parameter setting based on a power control parameter setting having a default ID. In other words, the terminal device 120 may determine the power control parameter setting based on another PC parameter setting. For example, the terminal device 120 may determine the power control parameter setting based on a PC parameter setting having a specific ID, such as 0 or 1. This ID may be, for example, sri-PUSCH-PowerControlId, Uplink-powerControlID, etc. As another example, the terminal device 120 may determine the power control parameter setting based on the last applied PC parameter setting.

[0128] In some embodiments, the terminal device 120 may determine the power control parameter setting based on the power control parameter setting applied for the random access procedure within a certain period. For example, the terminal device 120 may determine the power control parameter setting based on the last applied power control parameter setting for the random access procedure. It should be understood that the terminal device 120 may also determine the power control parameter setting based on any other appropriate procedure other than the random access procedure.

[0129] It should be understood that any combination of the above and any other appropriate rules is also possible.

[0130] In some scenarios, the PL RS may not be provided by the applied TCI state. In this case, the terminal device 120 may determine the PL RS using the default rule.

[0131] In some embodiments, the terminal device 120 may determine the PL RS based on a TCI state including the setting of the PL RS. In other words, the terminal device 120 may determine the PL RS based on another TCI state. For example, the terminal device 120 may determine the PL RS based on the TCI state applied to the associated CORESET. As another example, the terminal device 120 may determine the PL RS based on the TCI state applied to a CORESET having a specific ID, for example, the lowest ID or the lowest N IDs. As yet another example, the terminal device 120 may determine the PL RS based on a TCI state having a specific ID, for example, the lowest ID or the lowest N IDs.

[0132] In some embodiments, the terminal device 120 may determine the PL RS based on a default PL RS. In other words, the terminal device 120 may determine the PL RS based on another PL RS. For example, the terminal device 120 may determine the PL RS based on a PL RS having a specific ID, for example 0 or 1. The ID may be, for example, sri-PUSCH-PowerControlId, Uplink-powerControlID, PUSCH-PathlossReferenceRS-Id, PUSCH-PathlossReferenceRS-Id, PUCCH-PathlossReferenceRS-Id, SRS-PathlossReferenceRS-Id, SRS resource ID, CSI-RS resource ID, SS / PBCH index, etc. As another example, the terminal device 120 may determine the PL RS based on the last applied PL RS.

[0133] In some embodiments, the terminal device 120 may determine the PL RS based on the PL RS applied to the random access procedure within a certain period. For example, the terminal device 120 may determine the PL RS based on the PL RS last applied to the random access procedure. It should be understood that the terminal device 120 may also determine the PL RS based on any suitable procedure other than the random access procedure.

[0134] It should be understood that any combination of the above and any other suitable rules is also possible.

[0135] In some embodiments, the terminal device 120 may apply one or more default rules only within the CORESET / TCI / RS set associated with the same TRP. In some embodiments, when the first TCI state is not associated with the PC information, the terminal device 120 may apply one or more default rules to determine the first PC parameter setting and / or the first PL RS. In some embodiments, when the second TCI state is not associated with the PC information, the terminal device 120 may apply one or more default rules to determine the second PC parameter setting and / or the second PL RS. In some embodiments, when both the first TCI state and the second TCI state are not associated with the PC information, the terminal device 120 may apply one or more default rules to determine the first and second PC parameter settings and / or the first and second PL RSs.

[0136] In this way, even if the PC information is not provided by the applied TCI state, the terminal device can correctly find the PC information.

[0137] Exemplary embodiments of UL PC for STxMP For the sake of illustration, first, some explanations about the STxMP-MTRP method and the UE power class will be given as follows.

[0138] The STxMP-MTRP mode may include any of the following. · SDM mode: Different layers / DMRS ports of one PUSCH are precoded separately and transmitted simultaneously from different UE panels. · FDM-B mode: Two PUSCH transmission opportunities with the same / different RVs of the same TB are transmitted from different UE panels on non-overlapping frequency-domain resources and the same time-domain resources. · FDM-A mode: Different parts of the frequency-domain resources of one PUSCH transmission opportunity are transmitted from different UE panels. · SFN-based transmission mode: All of the same layer / DMRS ports of one PUSCH are transmitted simultaneously from two different UE panels. · SDM repetition mode: Two PUSCH transmission opportunities with the same / different RVs of the same TB are transmitted simultaneously from two different UE panels.

[0139] The following Table 1 shows exemplary assumptions for UE types.

Table 1

[0140] The following Table 2 shows an example of the UE maximum output power limit for UL MIMO for Power Class 1.

Table 2

[0141] The UE may set its maximum output power. The set UE maximum output power P for carrier f of serving cell c CMAX,f,c is defined as the maximum output power available for the reference point of a given transmitter branch corresponding to the reference point of the RSRP measurement value after upper layer filtering specified in TS 38.215.

[0142] In the case of per-panel power limitation, each panel may transmit at maximum power and may be used simultaneously. In the case of cross-panel power limitation (also referred to as per-UE power limitation), when panels are used simultaneously, it is possible to achieve the maximum power. In the case of cross-panel power limitation with power sharing, it is possible to achieve the maximum power for one panel. In the case of cross-panel power limitation without power sharing, when one panel is used, it may not be possible to achieve the maximum power for that one panel.

[0143] In some assumptions, the total per-UE power limitation on all UE panels used for STxMP, or the sum of the per-panel power limitations for STxMP, may be different (e.g., greater) from the existing power limitation for a given power class. In some assumptions, the total per-UE power limitation on all UE panels used for STxMP, or the sum of the per-panel power limitations for STxMP, may not be different (e.g., less) from the existing power limitation for a given power class. In some assumptions, the sum of the per-panel power limitations may be greater than the total per-UE power limitation. In some assumptions, the sum of the per-panel power limitations may be less than or equal to the total per-UE power limitation.

[0144] Figure 4 is a schematic diagram of a communication process 400 for UL PC for STxMP according to some exemplary embodiments of the present disclosure. For the sake of explanation, process 400 will be described with reference to FIGS. 1A-1C. In this example, the terminal device 120 is provided with panels 125-1 and 125-2. It should be understood that process 400 may be applied to more panels.

[0145] Referring to FIG. 4, the terminal device 110 may transfer information on UE capabilities to the network device 120 (405). For example, the network device 120 may send a radio resource control (RRC) configuration related to UE capability reporting to the terminal device 110. The terminal device 110 may report the capabilities of the terminal device 110 to the network device 120 based on the RRC configuration.

[0146] In some embodiments, the UE capability report may include at least one of information on whether the UE supports one or more power assumptions, information on whether the UE supports the calculation of PUSCH / PUCCH / SRS / PRACH Tx power information per panel, information on whether the UE supports the calculation of PHR per panel, information on whether the UE supports the calculation of PUSCH-DMRS power ratio per panel, information on whether the UE supports the calculation of PUSCH-PTRS power ratio per panel, the number of Pcmax supported by the UE, or the number of PHR supported by the UE. It should be understood that any other appropriate capability report is also possible.

[0147] 1. UL Transmission Power Calculation As shown in FIG. 4, the network device 110 may send an instruction of STxMP to the terminal device 120 (410). In some embodiments, the instruction of STxMP may include an instruction of the STxMP-MTRP method, for example, the SDM method, the FDM-B method, the FDM-A method, the SFN-based transmission method, or the SDM repetition method. In some embodiments, the instruction of STxMP may include a switch between the non-STxMP mode and the STxMP mode. It should be understood that the instruction of STxMP may further include any other appropriate information.

[0148] In response to the indication, the terminal device 120 may perform UL transmissions (e.g., PUSCH or any other suitable UL transmission) simultaneously on panels 125-1 and 125-2. The terminal device 120 may determine the transmission power of the uplink transmission based on at least one power limit for the panel (420).

[0149] Power limit per panel In some embodiments where the power limit per panel is used, the power limit may include a first threshold power (e.g., a first Pcmax) for panel 125-1 and a second threshold power (e.g., a second Pcmax) for panel 125-2.

[0150] In some embodiments, the first threshold power and the second threshold power may be based on information provided via a UE capability report or a PHR report.

[0151] In some embodiments, the first Pcmax and the second Pcmax may be the same. For example, the terminal device 120 may determine Pcmax based on the UE power class and determine that the first Pcmax = the second Pcmax = Pcmax. Since the total power when STxMP is enabled may exceed the upper limit, it may be necessary to redefine the UE power class. In some alternative embodiments, the terminal device 120 may determine that the first Pcmax = the second Pcmax = Pcmax / 2.

[0152] In some embodiments, the first Pcmax and the second Pcmax may be different, and (the first Pcmax + the second Pcmax) ≤ Pcmax. It should be understood that the two panels may be extended to N panels, where N is greater than 2.

[0153] In some embodiments, the terminal device 120 may determine the transmission power for panel 125-1 based on the first Pcmax and determine the transmission power for panel 125-2 based on the second Pcmax. For example, the terminal device 120 may determine the transmission power for panel 125-1 and the transmission power for panel 125-2 respectively based on the above formula (2). The parameters in formula (2) are associated with the same panel.

[0154] Also, the terminal device 120 may determine the transmission power for UL transmission (i.e., the first transmission power) based on the transmission power for panel 125-1 and the transmission power for panel 125-2. For example, the transmission power for UL transmission may be equal to the sum of the transmission power for panel 125-1 and the transmission power for panel 125-2.

[0155] Cross-panel power limitation without power sharing between panels In some embodiments where cross-panel power limitation is used, the power limitation may include a threshold power (e.g., Pcmax). In some embodiments, the threshold power may be based on the currently defined UE power class.

[0156] In some embodiments, the terminal device 120 may determine the scaled threshold power based on the threshold power divided by the number of panels. For example, the terminal device 120 may scale Pcmax by 1 / N for each panel, where N represents the number of panels used for simultaneous transmission. Alternatively, N may be the total number of the UE's panels. In some embodiments, N may be based on the information provided via the UE capability report or PHR report.

[0157] Further, the terminal device 120 may determine the transmission power for panel 125-1 based on the scaled threshold power, and determine the transmission power for panel 125-2 based on the scaled threshold power. For example, the terminal device 120 may determine the transmission power for panel 125-1 and the transmission power for panel 125-2 respectively based on the above formula (2). The parameters in formula (2) are associated with the same panel.

[0158] Therefore, the terminal device 120 may determine the transmission power for UL transmission (i.e., the first transmission power) based on the transmission power for panel 125-1 and the transmission power for panel 125-2. For example, the transmission power for UL transmission may be equal to the sum of the transmission power for panel 125-1 and the transmission power for panel 125-2.

[0159] Cross-panel power limitation with power sharing between panels In some embodiments where cross-panel power limitation is used, the power limitation may include a threshold power (e.g., Pcmax). In some embodiments, the threshold power may be based on the currently defined UE power class.

[0160] In some embodiments, the terminal device 120 may determine the transmission power for panel 125-1 based on the threshold power, and determine the transmission power for panel 125-2 based on the threshold power. For example, the terminal device 120 may determine the transmission power for panel 125-1 based on the following formula (5).

Number

[0161] For example, the terminal device 120 may determine the transmission power for panel 125-2 based on the following equation (6).

Equation

[0162] The terminal device 120 may determine whether the sum of the transmission power for panel 125-1 and the transmission power for panel 125-2 is greater than a threshold power (i.e., Pcmax). When the sum is below the threshold power, the terminal device 120 may determine the transmission power for UL transmission based on the transmission power for panel 125-1 and the transmission power for panel 125-2.

[0163] When the sum is greater than the threshold power, the terminal device 120 may determine the scaled transmission power for panel 125-1 based on the transmission power for panel 125-1 and the ratio of the threshold power to the sum. For example, the terminal device 120 may determine the scaled transmission power for panel 125-1 based on the following formula (7).

Equation

[0164] Similarly, the terminal device 120 may determine the scaled transmission power for panel 125-2 based on the transmission power for panel 125-2 and the ratio of the threshold power to the sum. For example, the terminal device 120 may determine the scaled transmission power for panel 125-2 based on the following formula (8).

Equation

[0165] Further, the terminal device 120 may determine the transmission power of UL transmission based on the scaled transmission power for panel 125-1 and the scaled transmission power for panel 125-2. For example, the transmission power for UL transmission may be equal to the sum of the scaled transmission power for panel 125-1 and the scaled transmission power for panel 125-2.

[0166] In this way, it is possible to correctly calculate the UL power without violating the limit on the maximum radiated power.

[0167] 2. UL DMRS Power Calculation Continuing to refer to FIG. 4, the terminal device 120 may determine the transmission power for RS transmission (for convenience, also referred to as the second transmission power in this specification) based on at least one power limit, the transmission power of UL transmission, and the ratio of the power-related parameters between UL transmission and RS transmission (430). According to an embodiment of the present disclosure, the ratio of the power-related parameters between UL transmission and RS transmission is determined based on at least one power limit.

[0168] In some embodiments, the RS transmission may be demodulation reference signal (DMRS) transmission, and the ratio of the power-related parameters may be the PUSCH to DMRS power ratio. In some embodiments, the PUSCH to DMRS power ratio may be the energy per resource element (EPRE) ratio per PUSCH to DMRS resource element. It should be understood that the PUSCH to DMRS power ratio may also adopt any other form.

[0169] In some embodiments where cross-panel power limitation is used, when the terminal device 120 supports power sharing between panels, the PUSCH to DMRS EPRE ratio may be based on the number of DMRS CDM groups without data.

[0170] In some embodiments where per-panel power limiting is used, the PUSCH-to-DMRS power ratio may be determined based on the number of DMRS code division multiplexing (CDM) groups without data per panel. This will be described in more detail in relation to Embodiments 1-3.

[0171] Embodiment 1 In this embodiment, per-panel power boosting may be performed using the "PUSCH-DMRS power ratio per panel" or "PUSCH-DMRS power ratio per layer" or "PUSCH-DMRS power ratio per panel per layer" or "PUSCH-DMRS EPRE ratio per panel" or "PUSCH-DMRS EPRE ratio per layer" or "PUSCH-DMRS EPRE ratio per panel per layer" or "PUSCH-DMRS EPRE ratio per layer per panel" instead of the "PUSCH-DMRS EPRE ratio".

[0172] In some embodiments, the terminal device 120 may determine a first PUSCH-to-DMRS power ratio for panel 125-1 based on the number of DMRS CDM groups without data associated with panel 125-1. In some embodiments, the terminal device 120 may determine the first PUSCH-to-DMRS power ratio by searching a table that includes a mapping between the PUSCH-to-DMRS power ratio for a panel and the number of DMRS CDM groups without data associated with the panel. In some embodiments, the terminal device 120 may calculate a value (represented as R) based on the following formula (8'), and determine the first PUSCH-to-DMRS power ratio by rounding up or down the R value, or by taking a predetermined number of decimal places for the R value. The predetermined number may be any suitable positive integer. TIFF2025521874000018.tif20168Here, R represents an intermediate value for calculating the PUSCH-to-DMRS power ratio, and X represents the number of DMRS CDM groups without data associated with the panel.

[0173] Further, the terminal device 120 may determine the transmission power for the first DMRS transmission via the panel 125-1 based on the transmission power for the first UL transmission via the panel 125-1 and the first PUSCH-to-DMRS power ratio.

[0174] Similarly, the terminal device 120 may determine the second PUSCH-to-DMRS power ratio for the panel 125-2 based on the number of DMRS CDM groups without data associated with the panel 125-2. In some embodiments, the terminal device 120 may determine the second PUSCH-to-DMRS power ratio by searching a table including the mapping between the PUSCH-to-DMRS power ratio for the panel and the number of DMRS CDM groups without data associated with the panel. In some embodiments, the terminal device 120 may calculate the R value based on Equation (8’), and determine the second PUSCH-to-DMRS power ratio by rounding up or down the R value, or by taking a predetermined number of digits after the decimal point for the R value. The predetermined number may be any appropriate positive integer.

[0175] Further, the terminal device 120 may determine the transmission power for the second DMRS transmission via the panel 125-2 based on the transmission power for the second UL transmission via the panel 125-2 and the second PUSCH-to-DMRS power ratio.

[0176] Table 3 below shows exemplary values of the “antenna port” field.

Table 3

Table 4

Table 5

[0177] Tables 3 to 5 are merely examples, and it should be understood that any other suitable method is also possible.

[0178] For example, the number of DMRS CDM groups without data may be provided in the "antenna ports" field within the DCI (e.g., format 0_1 or 0_2). The number of DMRS CDM groups without data may be "1", "2", "3" corresponding to CDM groups 0, {0,1}, {0,1,2} respectively.

[0179] If the value of the "antenna ports" field is "2", it can be seen from Table 3 that the number of DMRS CDM groups without data is "2" and the DMRS port is 0. Also, it can be seen from Table 4 that DMRS may be transmitted 3 dB higher than UL transmission at port 0. Since the number of DMRS CDM groups without data is "2", the CDM group is {0,1}. It can be seen from Table 5 that port 0 and port 1 are associated with one panel (e.g., panel 125-1), and port 2 and port 3 are associated with another panel (e.g., panel 125-2).

[0180] For panel 125-1, DMRS may be transmitted 3 dB higher than UL transmission at port 0. However, since port 2 and port 3 are associated with another panel, the power may not be used for DMRS power boosting, i.e., 0 dB is assumed. The total value of the power for the two panels does not change for DMRS and PUSCH, and the EPRE ratio is 0 dB at present. However, for the DMRS-PUSCH power ratio per panel, DMRS may be transmitted 3 dB higher than PUSCH.

[0181] When the transmission power for the first DMRS transmission and the transmission power for the second DMRS transmission are determined, it is possible to determine the second transmission power. For example, the second transmission power may be the sum of the transmission power for the first DMRS transmission and the transmission power for the second DMRS transmission.

[0182] Embodiment 2 In this embodiment, the terminal device may continuously use the "PUSCH-DMRS EPRE ratio" and count the "number of DMRS CDM groups without data" in consideration of whether the DMRS port and the ports in the DMRS CDM group without data are associated with the same panel.

[0183] In some embodiments, the terminal device 120 may determine whether a set of antenna ports in a DMRS CDM group without data and a set of antenna ports for DMRS transmission are associated with the same panel. When a set of antenna ports in a DMRS CDM group without data and a set of antenna ports for DMRS transmission are associated with different panels, the terminal device 120 may determine the number of updated DMRS CDM groups without data.

[0184] In some embodiments, the number of updated DMRS CDM groups without data may be determined by the following formula (9).

Equation

[0185] In some embodiments, the number of updated DMRS CDM groups without data may be determined by the following formula (10).

Equation

[0186] It should be understood that Equations (9) and (10) are merely examples, and any other suitable method is also possible. The present disclosure does not limit this aspect.

[0187] Also, the terminal device 120 may determine the PUSCH-to-DMRS power ratio based on the number of DMRS CDM groups without updated data. In some embodiments, the terminal device 120 may determine the PUSCH-to-DMRS power ratio by searching a table. In some embodiments, the terminal device 120 may calculate an R value based on Equation (8’), and determine the PUSCH-to-DMRS power ratio by rounding up or down the R value, or by taking a predetermined number of digits after the decimal point for the R value.

[0188] Also, the terminal device 120 may determine the transmission power of DMRS transmission based on the transmission power of UL transmission and the PUSCH-to-DMRS power ratio.

[0189] For example, if the value of the "antenna ports" field is "2", it can be seen from Table 3 that the number of DMRS CDM groups without data is "2", and the DMRS port is 0. Since the number of DMRS CDM groups without data is "2", the CDM groups are {0, 1}. It can be seen from Table 5 that one set of antenna ports in the DMRS CDM group without data includes ports 0, 1, 2, and 3 associated with a panel different from DMRS port 0. Since the ports in CDM group 0 are on the same panel as DMRS port 0 and the ports in CDM group 1 are on a panel different from DMRS port 0, based on Equation (9) or Equation (10), the updated number of DMRS CDM groups without data may be determined to be 1. Therefore, it can be seen from Table 4 that DMRS may be transmitted 0 dB higher than UL transmission at port 0, that is, the power may not be used for DMRS power boosting.

[0190] Embodiment 3 In this embodiment, the number of DMRS CDM groups without data may be set to "1" regardless of the DMRS port number, that is, power boosting is not allowed.

[0191] In some embodiments, if power limitation per panel is assumed or cross-panel power limitation is assumed and power sharing is not allowed, it is impossible to borrow power from other panels even if it is not used for data transmission.

[0192] In some embodiments, if cross-panel power limitation is assumed and power sharing between panels is allowed, the conventional boosting ratio may be assumed.

[0193] In this way, it is possible to correctly boost DMRS for PUSCH demodulation.

[0194] 3. UL PTRS Power Calculation In some embodiments, the RS transmission may be a phase tracking reference signal (PTRS) transmission, and the ratio of the power-related parameters may be the PUSCH to PTRS power ratio. In some embodiments, the PUSCH to PTRS power ratio may be the PUSCH to PTRS power ratio per layer. It should be understood that the PUSCH to PTRS power ratio may also adopt any other form.

[0195] The PUSCH to PTRS power ratio per layer is related to the number of PUSCH layers, antenna ports, coherence type and settings, and is used to boost the PTRS power when the corresponding resource element is not used for data transmission.

[0196] If power limitation per panel is used, or if cross-panel power limitation is used but power is not shared between panels, two PTRSs may be required, and one PTRS is used for one panel. The PUSCH to DMRS power ratio per layer may be determined based on the number of PUSCH layers allocated to one panel.

[0197] In some embodiments, the terminal device 120 may determine the number of PUSCH layers (also referred to as the first PUSCH layer number for convenience in this specification) allocated to panel 125-1, and based on the first PUSCH layer number, determine the first PUSCH to PTRS power ratio per layer for panel 125-1.

[0198] In some embodiments, the terminal device 120 may determine the first PUSCH to PTRS power ratio per layer by searching a table including the mapping between the PUSCH to PTRS power ratio per layer for the panel and the number of PUSCH layers associated with the panel.

[0199] In some embodiments, the terminal device 120 may calculate a value (represented as R') based on the following formula (10'), and determine the first PUSCH-to-PTRS power ratio per layer by rounding up or down the R' value, or by taking a predetermined number of digits after the decimal point for the R' value. The predetermined number may be any suitable positive integer. TIFF2025521874000024.tif21168Here, R' represents an intermediate value for calculating the PUSCH-to-PTRS power ratio per layer, and X' represents the number of PUSCH layers associated with the panel.

[0200] Further, the terminal device 120 may determine the transmission power of the first PTRS transmission via the panel 125-1 based on the first PUSCH-to-PTRS power ratio per layer and the transmission power of the UL transmission.

[0201] Table 6 below shows exemplary factors regarding the PUSCH-to-PTRS power ratio per RE per layer.

Table 6

[0202] For example, in STxMP SDM transmission (of course, not limited to this mode), layers 1 and 2 are from panel 1, and layers 3 and 4 are from panel 2. When determining the PUSCH-to-PTRS power ratio, the number of PUSCH layers is 2 instead of 4. It can be seen from Table 6 that the ratio should be 3 dB instead of 6 dB. This is only an example, and it should be understood that the present disclosure is not limited thereto.

[0203] Similarly, the terminal device 120 determines the number of PUSCH layers allocated to panel 125-2 (for convenience, also referred to as the second PUSCH layer number in this specification), and based on the second PUSCH layer number, may determine the second PUSCH-to-PTRS power ratio per layer for panel 125-2. In some embodiments, the terminal device 120 may determine the second PUSCH-to-PTRS power ratio per layer by searching a table that includes the mapping of the PUSCH-to-PTRS power ratio per layer for a panel and the number of PUSCH layers associated with the panel. In some embodiments, the terminal device 120 calculates a value (represented as R') based on formula (10'), and determines the second PUSCH-to-PTRS power ratio per layer by rounding up or down the R' value, or by taking a predetermined number of digits after the decimal point for the R' value. The predetermined number may be any suitable positive integer.

[0204] Also, the terminal device 120 may determine the transmission power of the second PTRS transmission via panel 125-2 based on the second PUSCH-to-PTRS power ratio per layer and the transmission power of the UL transmission.

[0205] It is possible to determine the transmission power of the PTRS transmission based on the transmission power for the first PTRS transmission and the transmission power for the second PTRS transmission.

[0206] In some embodiments where cross-panel power limitation is used and power sharing between panels is allowed for simultaneous transmission, one PTRS may be sufficient, and the PUSCH-to-PTRS power ratio per layer may be determined based on the total number of PUSCH layers.

[0207] In some embodiments, instead of the PUSCH-to-PTRS power ratio per RE per layer, the PUSCH-to-PTRS power ratio per RE per layer per panel may be used. In some embodiments, the terminal device 120 may determine the number of PUSCH layers, and based on the number of the PUSCH layers, determine the PUSCH-to-PTRS power ratio per RE per layer per panel. Further, the terminal device 120 may determine the transmission power of the PTRS transmission based on the PUSCH-to-PTRS power ratio per RE per layer per panel and the transmission power of the UL transmission.

[0208] In this way, it is possible to accurately determine the PTRS transmission power.

[0209] Returning to FIG. 4, when the transmission power of the UL transmission and the transmission power of the RS transmission are determined, the terminal device 120 may perform the UL transmission and the RS transmission accordingly (440).

[0210] 4. PHR Calculation and Reporting Continuing to refer to FIG. 4, the terminal device 120 may determine the power headroom (PH) for the UL transmission in consideration of the power consumption of the panel for simultaneous transmission (450). Further, the terminal device 120 may transmit a power headroom report (PHR) to the network device 110 (460). For the sake of illustration, some exemplary embodiments will be described with reference to Embodiments 4 to 6.

[0211] Embodiment 4 In this embodiment, the PHR may be determined based on the actual transmission.

[0212] Power Limitation per Panel In some embodiments where per-panel power limiting is used, two threshold powers and two PHs may be provided for the calculation of two PHs. In some embodiments, the power limit includes a first threshold power for panel 125-1 and a second threshold power for panel 125-2.

[0213] In some embodiments, the terminal device 120 may determine a first PH for panel 125-1 based on the first threshold power and the transmission power of the first UL transmission via panel 125-1. For example, the first PH may be determined by the following equation (11).

Equation

[0214] Similarly, the terminal device 120 may determine a second PH for panel 125-2 based on the second threshold power and the transmission power of the second UL transmission via panel 125-2. For example, the second PH may be determined by the following equation (12).

Equation

[0215] Also, the terminal device 120 may report the first PH and the second PH. It should be understood that equations (11) and (12) are merely examples, and any other suitable form is also possible.

[0216] Cross-panel power limiting In some embodiments where cross-panel power limiting is used, one threshold power and one or two PHs may be provided for the calculation of one or two PHs for STxMP. In some embodiments, the power limit includes the threshold power for panels 125-1 and 125-2.

[0217] In some embodiments where power sharing is not allowed, the terminal device 120 may determine a scaled threshold power based on the number of panels and the threshold power. The terminal device 120 may determine a first PH for panel 125-1 based on the scaled threshold power and the transmission power of the first UL transmission via panel 125-1. For example, the first PH may be determined by the following equation (13).

Equation

[0218] Similarly, the terminal device 120 may determine a second PH for panel 125-2 based on the scaled threshold power and the transmission power of the second UL transmission via panel 125-2. For example, the second PH may be determined by the following equation (14).

Equation

[0219] Also, the terminal device 120 may report the first PH and the second PH. It should be understood that equations (13) and (14) are merely examples, and any other suitable form is also possible.

[0220] In some embodiments where power sharing is allowed, it may be necessary to estimate the sum of Tx RS from two panels. In some embodiments, the terminal device 120 may determine the PH for UL transmission based on the threshold power and the sum of the transmission power of the first UL transmission via panel 125-1 and the transmission power of the second UL transmission via panel 125-2. For example, the PH may be determined by the following equation (15).

Equation

[0221] Also, the terminal device 120 may report the PH. It should be understood that equation (15) is merely an example, and any other suitable form is also possible.

[0222] Embodiment 5 In this embodiment, the PHR may be determined based on the reference transmission. The assumed Pcmax is represented by TIFF2025521874000031.tif12168, and the power consumption is based on the reference transmission with several assumed values. For example, the transmission power for panel 1 may be calculated based on the following equation (16).

Equation

[0223] The transmission power for panel 2 may be calculated based on the following equation (17). [Number] Here, TIFF2025521874000035.tif11168 represents the transmission power for panel 2 based on reference transmission, P O,panel2 represents the target power P0 for panel 2, α panel2 represents the path loss exponent alpha for panel 2, PL pan2 (q d ) represents the estimated downlink path loss value (dB) for panel 2 calculated using the reference signal (RS) index q d by the UE, and adjustment_panel2 represents the PUSCH power control adjustment state for panel 2. Further, q d is q d,pan , i.e., it may be the panel-specific PL RS.

[0224] Power limit per panel In some embodiments where power limit per panel is used, two threshold powers and two PHs may be provided for the calculation of two PHs. In some embodiments, the power limit includes a first threshold power for panel 125-1 and a second threshold power for panel 125-2.

[0225] In some embodiments, the terminal device 120 may determine a first PH for panel 125-1 based on a first threshold power of a first UL transmission via panel 125-1 and a transmission power. For example, the first PH may be determined by the following equation (18). [Number] Here, PH1 represents the PH for panel 1, TIFF2025521874000037.tif12168 represents the threshold power for panel 1, TIFF2025521874000038.tif11168 represents the transmission power of the reference transmission of panel 1.

[0226] Similarly, the terminal device 120 may determine a second PH for panel 125-2 based on a second threshold power of a second UL transmission via panel 125-2 and a transmission power. For example, the second PH may be determined by the following equation (19). [Number] Here, PH2 represents the PH for panel 2, TIFF2025521874000040.tif14168 represents the threshold power for panel 2, TIFF2025521874000041.tif13168 represents the transmission power of the reference transmission of panel 2.

[0227] Further, the terminal device 120 may report the first PH and the second PH. It should be understood that equations (18) and (19) are merely examples, and any other appropriate form is also possible.

[0228] Cross-panel power limitation In some embodiments where cross-panel power limiting is used, one threshold power may be provided for the calculation of two PHs for STxMP, and it may be necessary to estimate the total value of Tx RS from two panels. In some embodiments, the power limit includes the threshold power for panels 125-1 and 125-2.

[0229] In some embodiments, the terminal device 120 may determine the PH for UL transmission based on the threshold power and the total value of the transmission power of the first reference transmission via panel 125-1 and the transmission power of the second reference transmission via panel 125-2. For example, the PH may be determined by the following equation (20). [Number] Here, PH represents the PH for the reference transmission. TIFF2025521874000043.tif13168 represents the set threshold power. TIFF2025521874000044.tif11168 represents the transmission power of the reference transmission of panel 1. TIFF2025521874000045.tif12168 represents the transmission power of the reference transmission of panel 2.

[0230] Also, the terminal device 120 may report the PH. It should be understood that equation (20) is only an example, and any other suitable form is also possible.

[0231] In some embodiments, some assumed values for STxMP may be provided. For example, P O_NOMINAL,PUSCH,f,c (0 or 1) and p0 - PUSCH - AlphaSetId = 0 or 1, and PL b,f,c (q d ) is obtained using pusch - PathlossReferenceRS - Id = 0 or 1, and for panels 1 and 2, l = 0 or 1 respectively. Further, q d are q d,panel1 and q d,panel2That is, it may be the PL RS specific to the panel.

[0232] Embodiment 6 In this embodiment, the conditions for triggering the PHR may be updated.

[0233] In some embodiments, when the change in the path loss estimated value for the panel is higher than a threshold value (for convenience, also referred to as the first threshold value in this specification), the terminal device 120 may transmit a PHR for UL transmission.

[0234] In some embodiments, when the sum of the change in the path loss estimated value for the first panel (for example, panel 125-1) and the change in the path loss estimated value for the second panel (for example, panel 125-2) is higher than a threshold value (for convenience, also referred to as the second threshold value in this specification), the terminal device 120 may transmit a PHR for UL transmission.

[0235] In this way, it is possible to report an accurate PH to the network.

[0236] Exemplary embodiments of the method Accordingly, embodiments of the present disclosure provide a communication method implemented in a terminal device and a network device. With reference to FIGS. 5 to 7, these methods will be described below.

[0237] FIG. 5 is a diagram showing an exemplary communication method 500 implemented in a terminal device according to some embodiments of the present disclosure. For example, method 500 may be executed in the terminal device 120 as shown in FIGS. 1A to 1C. For the sake of explanation, method 500 will be described with reference to FIGS. 1A to 1C. Method 500 may include additional blocks not shown and / or some of the blocks shown may be omitted, and it should be understood that the scope of the present disclosure is not limited in this regard.

[0238] In block 510, the terminal device 120 receives a first setting for SRS transmission and a second setting for PUSCH transmission.

[0239] In block 520, the terminal device 120 determines whether it has received a first indication indicating an active TCI state and a second indication indicating power control information. If the first and second indications are received, method 500 proceeds to block 530.

[0240] In block 530, the terminal device 120 determines one of the first indication and the second indication for use in power control.

[0241] In block 540, the terminal device 120 determines a first transmission power for PUSCH transmission based on the first setting and the second setting and one of the first indication and the second indication.

[0242] In some embodiments, the first setting includes first information on a TCI state used for power control. In these embodiments, the terminal device 120 may determine a TCI state used for power control based on the first information and the first indication, and determine a second transmission power for SRS transmission based on power control information associated with the TCI state.

[0243] In some embodiments, the first information includes at least one of an identity of a TCI state, an association between an identity of an SRS resource set and an identity of a TCI state, an association between an identity of an SRS resource set and an identity of a TRP or a CORESET or a CORESET group or a search space set, and an association between an identity of a TRP or a CORESET or a CORESET group or a search space set and an identity of a TCI state, or a first value of a power control adjustment state indicating a TCI state used for power control.

[0244] In some embodiments, the terminal device does not anticipate different power control settings provided by the first instruction and the second instruction. In some embodiments, the first instruction and the second instruction provide the same power control information. In some embodiments, the first setting includes first information of the TCI state used for power control.

[0245] In some embodiments, the first instruction has a higher priority than the second instruction. In some embodiments, the terminal device 120 may ignore the power control information indicated by the second instruction before the application timing of the power control information indicated by the first instruction. In some embodiments, the terminal device 120 may override the power control information indicated by the second instruction with the power control information indicated by the first instruction before the application timing of the power control information indicated by the second instruction.

[0246] In some embodiments, the second instruction has a higher priority than the first instruction. In some embodiments, the terminal device 120 may ignore the power control information indicated by the first instruction before the application timing of the power control information indicated by the second instruction. In some embodiments, the terminal device 120 may override the power control information indicated by the first instruction with the power control information indicated by the second instruction before the application timing of the power control information indicated by the first instruction.

[0247] In some embodiments, the terminal device 120 receives second information including at least one of the TCI state used for reference signal power determination or the TCI state used for path loss reference signal determination, and determines a third transmission power for PRACH transmission based on the second information.

[0248] In some embodiments, when the TCI state used for reference signal power determination is associated with a first cell different from the serving cell of the terminal device, the terminal device 120 may obtain the reference signal power from the first cell.

[0249] In some embodiments, when the power control parameter setting is not provided by the TCI state determined based on the first setting and the second setting and one of the first instruction and the second instruction, the terminal device 120 may determine the power control parameter setting based on at least one of the power control parameter setting associated with the TCI state including the identity of the power control setting, the power control parameter setting having a predetermined identity, or the power control parameter setting applied to the random access procedure within a certain period. In some embodiments, the TCI state including the identity of the power control setting includes at least one of the TCI state applied to the CORESET associated with the PUSCH transmission, the TCI state applied to the CORESET having a predetermined identity, or the TCI state having a predetermined identity.

[0250] In some embodiments, when the path loss reference signal is not provided by the TCI state, the terminal device 120 may determine the path loss reference signal based on at least one of the TCI state including the setting of the path loss reference signal, the predetermined path loss reference signal, or the path loss reference signal applied to the random access procedure within a certain period. In some embodiments, the TCI state including the setting of the path loss reference signal includes at least one of the TCI state applied to the control resource set (CORESET) associated with the PUSCH transmission, the TCI state applied to the CORESET having a predetermined identity, or the TCI state having a predetermined identity. In some embodiments, the predetermined path loss reference signal includes the path loss reference signal having a predetermined identity or the path loss reference signal applied within a certain period.

[0251] FIG. 6 shows an exemplary communication method 600 implemented in a network device according to some embodiments of the present disclosure. For example, method 600 may be executed in a network device 110 (network device 110-1 or 110-2) as shown in FIGS. 1A-1C. For the sake of explanation, method 600 will be described with reference to FIGS. 1A-1C. It should be understood that method 600 may include additional blocks not shown and / or some of the blocks shown may be omitted, and the scope of the present disclosure is not limited in this regard.

[0252] In block 610, network device 110 transmits a first setting for SRS transmission and a second setting for PUSCH transmission.

[0253] In block 620, network device 110 transmits a first indication indicating an active TCI state and a second indication indicating power control information.

[0254] In block 630, network device 110 receives the PUSCH transmission transmitted at the first transmission power determined based on the first setting and the second setting and one of the first indication and the second indication.

[0255] In some embodiments, the first setting includes first information of a TCI state used for power control.

[0256] In some embodiments, the first information includes at least one of an identity of a TCI state, an association between an identity of an SRS resource set and an identity of a TCI state, an identity of an SRS resource set, an association between an identity of an SRS resource set and an identity of a TRP or a CORESET or a CORESET group or a search space set, and an association between an identity of a TRP or a CORESET or a CORESET group or a search space set and an identity of a TCI state, or a first value of a power control adjustment state, where the first value indicates a TCI state used for power control.

[0257] In some embodiments, the network device 110 may transmit second information including at least one of a TCI state used for reference signal power determination or a TCI state used for path loss reference signal determination.

[0258] FIG. 7 shows another exemplary communication method 700 implemented in a terminal device according to some embodiments of the present disclosure. For example, method 700 may be executed in a terminal device 120 as shown in FIGS. 1A-1C. For the sake of explanation, method 700 will be described with reference to FIGS. 1A-1C. It should be understood that method 700 may include additional blocks not shown and / or may omit some of the blocks shown, and the scope of the present disclosure is not limited in this regard.

[0259] In block 710, the terminal device 120 provided with the first panel and the second panel (for example, panel 125-1 and panel 125-2) receives an indication of simultaneous transmission on the first panel and the second panel.

[0260] In block 720, the terminal device 120 determines a first transmission power for uplink transmission based on at least one power limit for the first panel and the second panel.

[0261] In block 730, the terminal device 120 determines a second transmission power for reference signal transmission based on at least one power limit, the first transmission power, and a ratio of power-related parameters between uplink transmission and reference signal transmission, the ratio being determined based on at least one power limit.

[0262] In block 740, the terminal device 120 performs uplink transmission with the first transmission power and reference signal transmission with the second transmission power.

[0263] In some embodiments where the power limit includes a first threshold power for the first panel and a second threshold power for the second panel, the terminal device 120 may determine the transmission power for the first panel based on the first threshold power, determine the transmission power for the second panel based on the second threshold power, and determine the first transmission power based on the transmission power for the first panel and the transmission power for the second panel.

[0264] In some embodiments where the power limit includes a threshold power, the terminal device 120 may determine the scaled threshold power based on the threshold power divided by the number of panels, determine the transmission power for the first panel based on the scaled threshold power, determine the transmission power for the second panel based on the scaled threshold power, and determine the first transmission power based on the transmission power for the first panel and the transmission power for the second panel.

[0265] In some embodiments where the power limit includes a threshold power, the terminal device 120 may determine the transmission power for the first panel and the transmission power for the second panel. If the sum of the transmission power for the first panel and the transmission power for the second panel is greater than the threshold power, the terminal device 120 may determine the scaled transmission power for the first panel based on the transmission power for the first panel and the ratio of the threshold power to the sum value, and determine the scaled transmission power for the second panel based on the transmission power for the second panel and the ratio of the threshold power to the sum value. Further, the terminal device 120 may determine the first transmission power based on the scaled transmission power for the first panel and the scaled transmission power for the second panel.

[0266] In some embodiments where the reference signal transmission is DMRS transmission, the terminal device 120 determines a first PUSCH-to-DMRS power ratio for the first panel based on the number of DMRS CDM groups without data associated with the first panel, and determines the transmission power for the first DMRS transmission via the first panel based on the transmission power for the first uplink transmission via the first panel and the first PUSCH-to-DMRS power ratio. The terminal device 120 determines a second PUSCH-to-DMRS power ratio for the second panel based on the number of DMRS CDM groups without data associated with the second panel, and determines the transmission power for the second DMRS transmission via the second panel based on the transmission power for the second uplink transmission via the second panel and the second PUSCH-to-DMRS power ratio for the second panel. The terminal device 120 may determine a second transmission power based on the transmission power for the first DMRS transmission and the transmission power for the second DMRS transmission.

[0267] In some embodiments where the reference signal transmission is DMRS transmission, the terminal device 120 may determine whether a set of antenna ports in a DMRS CDM group without data and a set of antenna ports for DMRS transmission are associated with the same panel. If a set of antenna ports in a DMRS CDM group without data and a set of antenna ports for DMRS transmission are associated with different panels, the terminal device 120 determines the number of updated DMRS CDM groups without data, determines a PUSCH-to-DMRS power ratio based on the number of updated DMRS CDM groups without data, and may determine a second transmission power based on the first transmission power and the PUSCH-to-DMRS power ratio.

[0268] In some embodiments where the reference signal transmission is DMRS transmission, the number of DMRS CDM groups without data is 1.

[0269] In some embodiments where the reference signal transmission is PTRS transmission, the terminal device 120 determines the number of first PUSCH layers allocated to the first panel and the number of second PUSCH layers allocated to the second panel, determines a first PUSCH-to-PTRS power ratio per layer for the first panel based on the number of first PUSCH layers, determines a second PUSCH-to-PTRS power ratio per layer for the second panel based on the number of second PUSCH layers, determines the transmission power for the first PTRS transmission via the first panel based on the first PUSCH-to-PTRS power ratio per layer and the first transmission power, determines the transmission power for the second PTRS transmission via the second panel based on the second PUSCH-to-PTRS power ratio per layer and the first transmission power, and may determine a second transmission power based on the transmission power for the first PTRS transmission and the transmission power for the second PTRS transmission.

[0270] In some embodiments where the reference signal transmission is PTRS transmission, the terminal device 120 determines the number of PUSCH layers, and based on the number of PUSCH layers, determines a PUSCH-to-PTRS power ratio per panel per resource element per layer, and may determine a second transmission power based on the PUSCH-to-PTRS power ratio per panel per resource element per layer and the first transmission power.

[0271] In some embodiments where the power limit includes a first threshold power for the first panel and a second threshold power for the second panel, the terminal device 120 determines a first power headroom for the first panel based on the first threshold power and the transmission power of the first uplink transmission via the first panel, determines a second power headroom for the second panel based on the second threshold power and the transmission power of the second uplink transmission via the second panel, and may report the first power headroom and the second power headroom.

[0272] In some embodiments where the power limit includes a threshold power, the terminal device 120 determines a scaled threshold power based on the number of panels and the threshold power, determines a first power headroom for the first panel based on the scaled threshold power and the transmission power of a first uplink transmission via the first panel, determines a second power headroom for the second panel based on the scaled threshold power and the transmission power of a second uplink transmission via the second panel, and may report the first power headroom and the second power headroom.

[0273] In some embodiments where the power limit includes a threshold power, the terminal device 120 determines a power headroom for uplink transmission based on the threshold power and the sum of the transmission power of a first uplink transmission via the first panel and the transmission power of a second uplink transmission via the second panel, and may report the power headroom.

[0274] In some embodiments where the power limit includes a first threshold power for the first panel and a second threshold power for the second panel, the terminal device 120 determines the transmission power of a first reference transmission via the first panel based on a first set of parameters, determines the transmission power of a second reference transmission via the second panel based on a second set of parameters different from the first set of parameters, determines a first power headroom for the first panel based on the first threshold power and the transmission power of the first reference transmission, determines a second power headroom for the second panel based on the second threshold power and the transmission power of the second reference transmission, and may report the first power headroom and the second power headroom.

[0275] In some embodiments where the power limit includes a threshold power, the terminal device 120 determines the transmission power of a first reference transmission via a first panel based on a first set of parameters, determines the transmission power of a second reference transmission via a second panel based on a second set of parameters different from the first set of parameters, and determines the power headroom for the uplink transmission based on the threshold power and the sum of the transmission power of the first reference transmission and the transmission power of the second uplink transmission, and may report the power headroom.

[0276] In some embodiments, when the change in the estimated path loss value for the panel is higher than a first threshold, the terminal device 120 may transmit a power headroom report for the uplink transmission. In some embodiments, when the sum of the change in the estimated path loss value for the first panel and the change in the estimated path loss value for the second panel is higher than a second threshold, the terminal device 120 may transmit a power headroom report for the uplink transmission.

[0277] FIG. 8 is a schematic block diagram of an apparatus 800 suitable for implementing embodiments of the present disclosure. The apparatus 800 can be considered as another exemplary embodiment of the terminal device 120 and the network devices 110-1 and 110-2 shown in FIGS. 1A to 1C. Therefore, the apparatus 800 may be implemented in or as at least a part of the terminal device 120 and the network devices 110-1 and 110-2.

[0278] As shown, apparatus 800 includes a processor 810, a memory 820 coupled to the processor 810, a suitable transmitter (TX) and receiver (RX) 840 coupled to the processor 810, and a communication interface coupled to the TX / RX 840. The memory 810 stores at least a portion of program 830. The TX / RX 840 is used for two-way communication. The TX / RX 840 has at least one antenna to facilitate communication, although the access nodes referred to herein may actually have multiple antennas. The communication interface may represent any interface necessary for communication with other network elements, such as an X2 interface for two-way communication between eNBs, an S1 interface for communication between a Mobility Management Entity (MME) / Serving Gateway (S-GW) and an eNB, a Un interface for communication between an eNB and a Relay Node (RN), or a Uu interface for communication between an eNB and a terminal device.

[0279] It is assumed that program 830 includes program instructions that, when executed by the associated processor 810 as described herein with reference to FIGS. 1A-7, enable apparatus 800 to operate in accordance with embodiments of the present disclosure. Embodiments herein may be implemented by computer software executable by the processor 810 of apparatus 800, or by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Further, the combination of the processor 810 and the memory 820 may form processing means 850 suitable for implementing various embodiments of the present disclosure.

[0280] The memory 820 may be of any type suitable for a local technology network and, by way of non-limiting example, may be implemented using any suitable data storage technology such as a non-transitory computer-readable storage medium, a semiconductor-based memory device, a magnetic memory device and system, an optical memory device and system, a fixed memory, and a removable memory. Although only one memory 820 is shown within the device 800, there may be several physically different memory modules within the device 800. The processor 810 may be of any type suitable for a local technology network and, by way of non-limiting example, may include one or more of a general-purpose computer, a dedicated computer, a microprocessor, a digital signal processor (DSP), and a processor based on a multi-core processor architecture. The device 800 may have an application-specific integrated circuit chip that is temporally dependent on a clock that synchronizes a plurality of processors, such as a main processor.

[0281] In some embodiments, the terminal device comprises a circuit, the circuit receives a first setting for SRS transmission and a second setting for PUSCH transmission, and determines, according to a determination that a first indication indicating an active TCI state and a second indication indicating power control information have been received, one of the first indication and the second indication for use in power control, and is configured to determine a first transmission power for the PUSCH transmission based on the first setting and the second setting and one of the first indication and the second indication.

[0282] In some embodiments, the network device comprises a circuit, the circuit transmits a first setting for SRS transmission and a second setting for PUSCH transmission, transmits a first indication indicating an active TCI state and a second indication indicating power control information, and is configured to receive the PUSCH transmission transmitted at the first transmission power determined based on the first setting and the second setting and one of the first indication and the second indication.

[0283] In some embodiments, a terminal device provided with a first panel and a second panel includes a circuit, the circuit receives an instruction for simultaneous transmission on the first panel and the second panel, determines a first transmission power for uplink transmission based on at least one power limit for the first panel and the second panel, determines a second transmission power for reference signal transmission based on at least one power limit, the first transmission power, and a ratio of power-related parameters between uplink transmission and reference signal transmission, the ratio being determined based on at least one power limit, and is configured to perform the uplink transmission with the first transmission power and perform the reference signal transmission with the second transmission power.

[0284] As used herein, the term "circuit" may mean a hardware circuit and / or a combination of a hardware circuit and software. For example, a circuit may be a combination of analog and / or digital hardware circuits and software / firmware. As yet another example, a circuit may be any part of a hardware processor with software, including a digital signal processor, software, and one or more memories, that cooperate to cause a device such as a terminal device or a network device to perform various functions. In yet another example, a circuit may be a hardware circuit and / or a processor such as a microprocessor or a part thereof that requires software / firmware for operation, but the software may not be present if not required for operation. As used herein, the term "circuit" includes realizations of only a hardware circuit or one or more processors, or a part of a hardware circuit or one or more processors and their (or their) accompanying software and / or firmware.

[0285] Overall, various embodiments of the present disclosure may be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some aspects may be implemented in hardware, and other aspects may be implemented in firmware or software executable by a controller, microprocessor, or other computing device. Although various aspects of the embodiments of the present disclosure are illustrated and described using block diagrams, flowcharts, or other pictorial representations, the blocks, devices, systems, techniques, or methods described herein are, by way of non-limiting example, implemented in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or any combination thereof.

[0286] The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions included in program modules, that are executed within a device on a target actual processor or virtual processor to perform the processes or methods described above with reference to FIGS. 1A-7. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, etc. that perform particular tasks or implement particular abstract data types. In various embodiments, the functions of the program modules may be combined or divided among the program modules as needed. The machine-executable instructions of the program modules may be executed within a local or distributed device. In a distributed device, the program modules may be located in both local and remote storage media.

[0287] The program code for executing the method of the present disclosure may be described in any combination of one or more programming languages. These program codes are provided to a processor or a controller of a general-purpose computer, a dedicated computer, or other programmable data processing devices, and when executed by the processor or the controller, the program codes implement the functions / operations specified in the flowchart and / or block diagram. The program code may be executed entirely on the machine, partially on the machine, as an independent software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0288] The above-mentioned program code may be implemented on a machine-readable medium, and the machine-readable medium may be any tangible medium that can be used by or include or store a program related to an instruction execution system, device, or apparatus. The machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. The machine-readable medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or apparatus, or any suitable combination of the foregoing media. More specific examples of the machine-readable storage medium may include an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0289] Although the operations have been described in a particular order, it should be understood that such operations are not necessarily required to be executed in the particular order shown or sequentially, nor that all of the operations described be executed, to obtain a desired result. In some cases, multitasking and parallel processing may be advantageous. Similarly, although some specific implementation details are included in the above discussion, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Some of the features described in the context of individual embodiments may be combined and implemented in a single embodiment. Conversely, various features described in the context of a single embodiment may be implemented separately in multiple embodiments or in any suitable sub-combination.

[0290] Although the present disclosure has been described in language specific to structural features and / or methodological operations, it should be understood that the present disclosure as defined in the appended claims is not necessarily limited to the specific features or operations described above. Rather, the specific features and operations described above are disclosed as exemplary forms of implementing the claims.

Claims

1. A method of communication, comprising: at a terminal device, receiving a first setting for transmitting a sounding reference signal (SRS) and a second setting for transmitting a physical uplink shared channel (PUSCH); determining, according to a determination that a first indication indicating a transmission configuration indicator (TCI) state and a second indication indicating power control information are received, one of the first indication and the second indication for use in power control; determining a first transmission power for the PUSCH transmission based on the first setting and the second setting and the one of the first indication and the second indication; A method comprising the above.

2. Determining the first transmission power includes: determining, according to a determination that power control parameter setting is not provided by a TCI state determined based on the first setting and the second setting and the one of the first indication and the second indication, the power control parameter setting to be a power control parameter setting associated with a TCI state including an identity of a power control setting, a power control parameter setting having a predetermined identity, or a power control parameter setting applied to a random access procedure within a certain period, determining based on at least one of the above, or determining, according to a determination that a path loss reference signal is not provided by the TCI state determined based on the first setting and the second setting and the one of the first indication and the second indication, the path loss reference signal to be a TCI state including a setting of the path loss reference signal, a predetermined path loss reference signal, or a path loss reference signal applied to a random access procedure within a certain period, including at least one of the above, The method according to Claim 1.

3. The first setting includes first information on a TCI state used for power control, and the method includes: determining the TCI state used for power control based on the first information and the first indication; Determining a second transmission power for the SRS transmission based on the power control information associated with the TCI state; further comprising the method according to claim 1.

4. The first information includes the identity of the TCI state, the association between the identity of the SRS resource set and the identity of the TCI state, the association between the identity of the SRS resource set and the identity of a transmission reception point (TRP) or a control resource set (CORESET) or a CORESET group or a search space set, and the association between the identity of the TRP or CORESET or CORESET group or search space set and the identity of the TCI state, or a first value of a power control adjustment state indicating the TCI state used for power control, including at least one of the method according to claim 3.

5. Determining the second transmission power includes determining, according to a determination that the power control parameter setting is not provided by the TCI state used for power control, the power control parameter setting based on a power control parameter setting associated with a TCI state including the identity of the power control setting, a power control parameter setting having a predetermined identity, or a power control parameter setting applied to a random access procedure within a certain period, or determining, according to a determination that the path loss reference signal is not provided by the TCI state used for power control, the path loss reference signal based on a TCI state including the setting of the path loss reference signal, a predetermined path loss reference signal, or a path loss reference signal applied to a random access procedure within a certain period, including at least one of the method according to claim 3.

6. The terminal device does not anticipate different power control settings provided by the first instruction and the second instruction, the first instruction and the second instruction provide the same power control information, or the first setting includes first information of a TCI state used for power control, the method according to claim 1.

7. The first instruction has a higher priority than the second instruction, and determining the first transmission power includes ignoring the power control information indicated by the second instruction before the application timing of the power control information indicated by the first instruction, or overriding the power control information indicated by the second instruction with the power control information indicated by the first instruction before the application timing of the power control information indicated by the second instruction. The method according to claim 1.

8. The second instruction has a higher priority than the first instruction, and determining the first transmission power includes ignoring the power control information indicated by the first instruction before the application timing of the power control information indicated by the second instruction, or overriding the power control information indicated by the first instruction with the power control information indicated by the second instruction before the application timing of the power control information indicated by the first instruction. The method according to claim 1.

9. receiving second information including at least one of the TCI states used for reference signal power determination or the TCI states used for path loss reference signal determination; determining a third transmission power for physical random access channel (PRACH) transmission based on the second information; further comprising The method according to claim 1.

10. Determining the third transmission power includes acquiring the reference signal power from the first cell according to a determination that the TCI state used for reference signal power determination is associated with a first cell different from the serving cell of the terminal device. The method according to claim 9.

11. Determining the third transmission power includes determining a power control parameter setting based on at least one of a power control parameter setting associated with a TCI state including an identity of a power control setting, a power control parameter setting having a predetermined identity, or a power control parameter setting applied to a random access procedure within a certain period according to a determination that no power control parameter setting is provided by the TCI state used for reference signal power determination. a power control parameter setting associated with a TCI state including an identity of a power control setting, a power control parameter setting having a predetermined identity, or a power control parameter setting applied to a random access procedure within a certain period. In accordance with the determination that the path loss reference signal is not provided by the TCI state used for determining the path loss reference signal, the path loss reference signal is determined based on at least one of a TCI state including a setting of the path loss reference signal, a predetermined path loss reference signal, or a path loss reference signal applied for a random access procedure within a certain period, including at least one of the method according to claim 9. **Claim 12** The TCI state including the identity of the power control setting is a TCI state applied to a control resource set (CORESET) associated with the PUSCH transmission, a TCI state applied to a CORESET having a predetermined identity, or a TCI state having a predetermined identity, including at least one of the method according to claim 2, 5 or 11. **Claim 13** The TCI state including the setting of the path loss reference signal is a TCI state applied to a control resource set (CORESET) associated with the PUSCH transmission, a TCI state applied to a CORESET having a predetermined identity, or a TCI state having a predetermined identity, including at least one of the method according to claim 2, 5 or 11. **Claim 14** The predetermined path loss reference signal is a path loss reference signal having a predetermined identity, or a path loss reference signal applied within a certain period, including the method according to claim 2, 5 or 11. **Claim 15** A communication method, comprising: in a network device, transmitting a first setting of a sounding reference signal (SRS) transmission and a second setting of a physical uplink shared channel (PUSCH) transmission; transmitting a first indication indicating a transmission configuration indicator (TCI) state and a second indication indicating power control information; receiving the PUSCH transmission transmitted at the first transmission power determined based on the first setting and the second setting and one of the first indication and the second indication; The method including the above. Claim 16 The first setting includes first information on a TCI state used for power control The method according to claim 15 Claim 17 The first information is the identity of the TCI state, the association between the identity of the SRS resource set and the identity of the TCI state, the association between the identity of the SRS resource set and the identity of a transmission reception point (TRP) or a control resource set (CORESET) or a CORESET group or a search space set, and the association between the identity of the TRP or CORESET or CORESET group or search space set and the identity of the TCI state, or a first value of a power control adjustment state indicating the TCI state used for power control, including at least one of The method according to claim 16 Claim 18 further comprising transmitting second information including at least one of a TCI state used for reference signal power determination or a TCI state used for path loss reference signal determination The method according to claim 15 Claim 19 A communication device comprising a processor configured to execute the method according to any one of claims 1 to 14, or any one of claims 15 to 18 device

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