Terminal devices, network devices, and methods

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 generally relate to the field of telecommunication, and particularly to a communication method, apparatus, and computer-readable storage medium 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 limit assumptions for simultaneous transmission across multi-panels (STxMP), namely, the per-panel power limit for STxMP and the total per-user equipment (UE) power limit on all UE panels used for STxMP, have been discussed. However, how to perform UL PC for these scenarios is still incomplete and requires further study.

Summary of the Invention

Problems to be Solved by the Invention

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

Means for Solving the Problems

[0004] In a first embodiment, a method of communication is provided. The method includes, in 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 one of the first and second instructions for use in power control, in accordance with the determination that a first instruction indicating an active TCI state and a second instruction indicating power control information have been received; and determining a first transmit power for the PUSCH transmission based on the first setting and the second setting and one of the first and second instructions.

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

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

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

[0008] In a fifth embodiment, a computer-readable medium storing instructions is provided. When the instructions are executed on at least one processor, the instructions cause the at least one processor to perform the method described in the first, second, or third embodiment of the present disclosure.

[0009] It should be understood that the summary portion of the invention is not intended to identify any important or fundamental features of the embodiments of this disclosure, nor to limit the scope of this disclosure. Other features of this disclosure should be readily apparent from the following description. [Brief explanation of the drawing]

[0010] The above-mentioned and other objectives, features, and advantages of this disclosure will be further clarified by describing in more detail some embodiments of this disclosure in the attached drawings.

[0011] [Figure 1A] This figure shows an exemplary communication network on which the embodiments of this disclosure can be implemented.

[0012] [Figure 1B] This figure shows another exemplary communication network on which embodiments of the present disclosure can be implemented.

[0013] [Figure 1C] This figure shows yet another exemplary communication network on which embodiments of the present disclosure can be implemented.

[0014] [Figure 1D] This figure shows an exemplary scenario of PC-related settings that can be implemented according to the embodiments of this disclosure.

[0015] [Figure 2] This is a schematic diagram of a communication process for UL PC within an integrated TCI framework, according to some exemplary embodiments of the present disclosure.

[0016] [Figure 3A] This figure shows exemplary scenarios of application timing according to some embodiments of the present disclosure.

[0017] [Figure 3B] This figure shows another exemplary scenario of application timing according to some embodiments of the present disclosure.

[0018] [Figure 3C] This figure shows another exemplary scenario of application timing according to some embodiments of the present disclosure.

[0019] [Figure 3D] This figure shows another exemplary scenario of application timing according to some embodiments of the present disclosure.

[0020] [Figure 4] This is a schematic diagram of a communication process for UL PC regarding STxMP according to some exemplary embodiments of the present disclosure.

[0021] [Figure 5] This flowchart shows an exemplary method performed by a terminal device according to some embodiments of the present disclosure.

[0022] [Figure 6] This flowchart shows an exemplary method performed by a network device according to some embodiments of the present disclosure.

[0023] [Figure 7] This flowchart shows another exemplary method performed by a terminal device according to some embodiments of the present disclosure.

[0024] [Figure 8] This is a schematic block diagram of a device suitable for implementing an embodiment of the present disclosure.

[0025] In the diagram, identical or similar reference numbers represent identical or similar elements. [Modes for carrying out the invention]

[0026] The principles of this disclosure will now be explained with reference to several embodiments. These embodiments are provided for illustrative purposes only and are intended to help those skilled in the art understand and implement this disclosure, and should be understood as not to imply any limitation on the scope of this disclosure. The disclosures described herein can be implemented in a variety of ways other than those described below.

[0027] In the following description and claims, unless otherwise defined, all technical and scientific terms used herein have the same meanings as those generally understood by those skilled in the art.

[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 V2X communication where X represents pedestrians, vehicles, or infrastructure / networks, devices for Integrated Access and Backhaul (IAB), Small Data Transmission (SDT), mobility, Multicast and Broadcast Services (MBS), positioning, dynamic / flexible redundancy in commercial networks, RedCap (reduced capability), and High Altitude Platforms (HAP) encompassing satellites and Unmanned Aircraft Systems (UAS). This includes satellite-borne vehicles or aircraft-borne vehicles within a non-terrestrial network (NTN), including a platform; extended reality (XR) devices that include different types of reality such as augmented reality (AR), mixed reality (MR), and virtual reality (VR); unmanned aerial vehicles (UAVs), which are aircraft without human pilots and are commonly referred to as drones; and high-speed trains (HSTs)."Terminal equipment" includes, but is not limited to, devices 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. "Terminal equipment" may also have multicast / broadcast capabilities and support public safety and mission-critical, V2X applications, transparent IPv4 / IPv6 multicast distribution, IPTV, smart TV, wireless services, wireless software distribution, group communications, and IoT applications. It may also incorporate one or more subscriber identity modules (SIMs), known as multi-SIMs. The term "terminal equipment" may be used interchangeably with UE, mobile station, subscriber station, mobile terminal, user terminal, or wireless device.

[0029] The term "network device" refers to a device that can provide or host a cell or coverage on which terminal devices can communicate. Examples of network devices include, but are not limited to, Node B (NodeB or NB), Evolutionary 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), Low-Power Nodes such as IAB Nodes, Femtonodes, and Piconodes, Reconfigurable Intelligent Surfaces (RIS), and Network Control Repeaters.

[0030] Terminal devices or network devices may possess artificial intelligence (AI) or machine learning capabilities. Generally, this includes trained models derived from large amounts of data collected for specific functions, which can be used to predict certain information.

[0031] Terminal or network devices may operate 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, they can operate on licensed / unlicensed / shared spectrum. Terminal devices may have two or more connections to network devices under multi-radio dual connectivity (MR-DC) application scenarios. Terminal or network devices can operate in full-duplex, flexible-duplex, and cross-split-duplex modes.

[0032] Network devices may have functions for network energy saving, self-organizing networks (SON), and minimization of drive tests (MDT). Terminals may have power saving functions.

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

[0034] Embodiments of the present disclosure may be implemented in accordance with any generation of communication protocols currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, 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 and second network devices may be a master node and the other a secondary node. The first and second network devices 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 to the terminal device from at least one of the first or second network devices. 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 reconfiguration of terminal devices set by the second network device may be transmitted from the second network device directly to the terminal devices or via the first network device.

[0036] As used herein, the singular forms “one” and “the foregoing” also include the plural form unless explicitly indicated in the context. The term “including” and its variations should be understood as an unrestrictive term meaning “including, but not limited to.” The term “based on” should be understood as “at least partially based on.” The terms “one embodiment” and “embodiment” should be understood as “at least one embodiment.” The term “another embodiment” should be understood as “at least one other embodiment.” Terms such as “first,” “second,” etc., may refer to different or identical subjects. The following may include other explicit and implicit definitions.

[0037] In some examples, values, procedures, or devices are referred to as “best,” “lowest,” “highest,” “minimum,” “maximum,” etc. Such descriptions are intended to show that a choice can be made from many commonly used functional alternatives, and it should be understood that such a choice does not necessarily have to be better, smaller, higher, or otherwise preferable than other choices.

[0038] As mentioned above, how to implement UL PC within the integrated TCI framework for MTRP is still incomplete, and how to implement 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 a UL PC to solve the above and other potential problems. In one solution, when a terminal device receives an instruction indicating an active TCI state (e.g., a TCI field in a DCI) and another instruction indicating PC information (e.g., an SRS resource indicator (SRI) field in another DCI), the terminal device determines one of the first instruction and the second instruction for use in the PC. Thus, it is possible to achieve appropriate UL power determination.

[0040] In another solution, upon receiving an STxMP instruction, a terminal device equipped with multiple panels determines the transmit power for uplink transmission (also referred to herein as the first transmit power for convenience) based on at least one power limit for the multiple panels. Furthermore, the terminal device determines the ratio of power-related parameters for the uplink transmission and the reference signal transmission based on the at least one power limit, and determines the transmit power for the reference signal transmission (also referred to herein as the second transmit power for convenience) based on this ratio, the at least one power limit, and the transmit power for the uplink transmission. The terminal device then performs the uplink transmission with the first transmit power and the reference signal transmission with the second transmit power. In this way, it is possible to correctly determine the UL power and achieve appropriate UL power control.

[0041] The principles and embodiments of this disclosure will be described in detail below with reference to the attached drawings.

[0042] In this disclosure, some terms may refer to the same or similar physical meanings and may be used interchangeably. Some illustrative examples are given below. The terms “port used for uplink transmission,” “port used for push transmission,” “port with non-zero push transmission power,” and “port with non-zero uplink transmission power” may be used interchangeably. The terms “panel used for uplink transmission,” “panel used for push transmission,” “panel with non-zero push transmission power,” and “panel with 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 relationship information," "spatial relationship info," "precoding information," "precoding information and number of layers," "precoding matrix indicator (PMI)," "precoding matrix indicator," "transmit precoding matrix indication," "precoding matrix indication," "TCI status," "transmit setting indicator," "quasi co-location (QCL)," "quasi co-location," "QCL parameter," "QCL assumption," "QCL relationship," and "spatial relationship" 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 State," "Multiple CORESET," "Multiple Control Resource Set Pool," "Multi-TRP," "Multi-TCI State," "Multi-TCI," "Multi-CORESET," and "Multi-Control Resource Set Pool," "MTRP," "M-TCI," and "M-TPR" may be used interchangeably. The terms "resource," "resource within a resource set," and "resource set" may be used interchangeably. The terms “group,” “subset,” and “set” may be used interchangeably. Furthermore, as described herein, a panel refers to one or more antenna elements provided in a certain area of ​​a terminal device. Panels as described herein may also refer to downlink panels, uplink panels, panel types, panel statuses, capability sets, reference signal (RS) resources, RS resource sets, antenna ports, antenna port groups, beams, and beam groups. In this regard, the terms (and their equivalent expressions) “panel,” “panel type,” “antenna port set,” “antenna element,” and “antenna array” may be used interchangeably. Furthermore, the panel information described herein may refer to UE panel index / identification (ID), downlink panel ID, uplink panel ID, panel type indicator, panel status indicator, capability set index, RS resource ID, RS resource set ID, antenna port ID, antenna port group ID, beam ID, and beam group ID. The term "per panel" may be used interchangeably with "per capability index," "per capability set index," "per RF chain," "per Tx RF chain," "per branch," "per Tx branch," etc. As used herein, the term “TRP” means an antenna array (having one or more antenna elements) available to a network device located at a specific geographical location. While some embodiments of this disclosure have been described with reference to multi-TRP scenarios (or single-TRP scenarios) as examples, these embodiments are for illustrative purposes only and are intended to help those skilled in the art understand and implement this disclosure, and do not imply any limitation on the scope of this disclosure. It should be understood that the contents of this disclosure described herein can be implemented in a variety of ways different from those described below. As used herein, the term “SRS transmission” refers to the transmission of an SRS resource identified by the SRS signal resource indicator (SRI) in a DCI message for uplink authorization. Therefore, the term “recent SRS transmission” refers to the most recent transmission of an SRS resource identified by the SRI in a DCI message for uplink authorization. As used herein, the terms “network” and “network device” refer to one or more network devices. Therefore, the terms “network,” “network device,” and “one or more network devices” may be used interchangeably. • A “lower capability panel” may be used interchangeably with a “higher capability panel,” a “panel corresponding to a lower / higher capability value set index,” a “last used panel,” or an “older panel used in initial access / minimum PRACH.” In other words, it may be any default rule known to both the network and the UE, or it may be signaled to each other by the network / UE through configuration / capability reporting / requests. The "BWP ID / Index" may be used interchangeably with the "BWP / CC ID / Index", "CC Identity / Index", "Cell Identity / Index", "Physical Cell Identity / Index", and "Serving Cell Identity / Index".

[0043] Examples of communication environments Figure 1A shows an exemplary communication network 100A that can implement embodiments of the present disclosure. The communication network 100A includes network device 110-1 and an optional network device 110-2 (collectively or individually referred to as network device 110). Network device 110 may provide services to terminal device 120. For illustrative purposes, network device 110-1 is referred to as the first network device 110-1, and network device 110-2 is referred to as the second network device 110-2. Furthermore, 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 network device 110 (for example, the first network device 110-1 or the second network device 110-2) to terminal device 120 is called a downlink, and the link from terminal device 120 to network device 110 (for example, the first network device 110-1 or the second network device 110-2) is called 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 terminal device 120 is a receiving (RX) device (or receiver). In the uplink, 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 Figure 1A, the terminal device 120 is provided with panels 125-1 and 125-2. Hereinafter, 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, 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, terminal device 120 may execute PUSCH simultaneously on both panels 125-1 and 125-2.

[0049] In some embodiments, MTRP transmission can also be supported. As shown in Figure 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 illustrative purposes, 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, 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 with multiple TRPs at different geographic locations to achieve better coverage. In one particular exemplary embodiment, the first network device 110-1 comprises a first TRP 130-1 and a second TRP 130-2. Alternatively, in another particular exemplary embodiment, the first network device 110-1 and the second network device 110-2 each comprise a first TRP 130-1 and a second TRP 130-2, respectively.

[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 shown in Figure 1A. Specifically, in single TRP mode, terminal device 120 communicates with the network via the first TRP 130-1 / second TRP 130-2. Alternatively, in MTRP mode, terminal device 120 communicates with the network via both the first TRP 130-1 and the second TRP 130-2.

[0053] In one specific exemplary embodiment, during PUSCH STxMP, the terminal device 120 simultaneously communicates with a first TRP 130-1 via panel 125-1 and with a second TRP 130-2 via 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 contained within the same serving cell or within different serving cells. In other words, both inter-cell transmission and intra-cell transmission are supported by the specific example in Figure 1A.

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

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

[0057] Communication in communication network 100A may comply with any appropriate standard, including but not limited to Long Term Evolution (LTE), LTE-Evolution, LTE-Advanced (LTE-A), Wideband Code Division Multiple Access (WCDMA®), Code Division Multiple Access (CDMA), and Global System for Mobile Communications (GSM). Furthermore, communication may be performed in accordance with any generation of communication protocol currently known or to be developed in the future. Examples of communication protocols include, but are not limited to, 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 protocols.

[0058] It should be understood that the number of elements (i.e., terminal devices 120, panels 125, network devices 110, TRP 130, and cells 140) and their connections and types shown in Figures 1A-1C are for illustrative purposes only and do not imply any limitation. The communication network 100A may comprise any suitable number of elements suitable for carrying out 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 individually or jointly. Alternatively, the type of integrated TCI state may include DLorJoint and UL. Uplink-powerControl may further provide power control parameter settings, e.g., P0, alpha, and closedLoopIndex for PUSCH, PUCCH, and SRS respectively.

[0060] In some embodiments, terminal device 120 may receive a DCI from network device 110 that includes a TCI field indicating multiple TCI states. These multiple TCI states may be associated with their respective CORESET or CORESET group or search space set (i.e., their 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 multiple TCI states, and how to determine which power control parameter settings and / or PL RS are applicable if they are not provided.

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

[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 the PRACH transmission.

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

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

[0065] As shown in Figure 1D, at timing T2, the terminal device may receive a DCI for beam indication change of the beam, which 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 the 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. A second push transmission may be transmitted to a second TPR based on the second Tx power and the second Tx beam.

[0066] Continuing with reference to Figure 1D, at timing T3, the terminal device may receive a DCI for scheduling a PUSCH transmission at timing T4, the DCI including one or more SRI fields. The SRI fields 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 a first SRI-PUSCH-PowerControl and a first SRS resource, and a second SRI indicating an SRI-PUSCH-PowerControl and a 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 unclear whether the PUSCH transmission at timing T4 was performed based on the procedure indicated by reference numeral 151 or 152.

[0068] Furthermore, due to different power limiting assumptions, it may be necessary to update the impact of maximum power on UL PCs depending on the UE power class. Additionally, DMRS and PTRS power boosting is all based on "unused power" on those resource elements (RE) that are not being used for data transmission. However, in STxMP, due to different power limiting assumptions, that "unused power" may or may not be available to boost DMRS and PTRS power.

[0069] In view of this, embodiments of the present disclosure provide communication solutions for UL PCs to solve the above and other potential problems. These solutions are described below with reference to Figures 2-4. Figures 2 and 4 are schematic diagrams of communication processes according to some exemplary embodiments of the present disclosure. These processes are described with reference to Figures 1A-1C for illustrative purposes.

[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 a first set of antenna ports, and the second panel 125-2 corresponds to a 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 / second network device 110-2. In addition, the first TRP 130-1 and the second TRP may be located in the same serving cell or in different serving cells.

[0072] The following text describes several embodiments of the present disclosure with reference to two TRPs and two panels, but these embodiments are for illustrative purposes only and are intended 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 contents of the present disclosure described herein can be implemented in a variety of ways other than those described below.

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

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

[0075] In some embodiments, one or more interactions may be specific to a particular panel, TRP, capability value, CORESET, etc. This allows for flexible configuration or activation of PUSCH STxMP.

[0076] Furthermore, although features / operations have been described separately in specific exemplary embodiments, it should be understood that, unless explicitly stated otherwise, these features / operations described in different exemplary embodiments may be used in any appropriate combination.

[0077] Exemplary Embodiments of UL PC within an Integrated TCI Framework For illustrative purposes, we will first provide some explanations regarding the integrated TCI framework and PL estimation, as follows.

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

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

number

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

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

[0082] In some embodiments, a UE capability report may include at least one of the following: information on which signaling the UE supports with higher priority; information on whether the UE supports setting information on TCI states used for the PC; information on whether the UE supports default rules; or information on 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 Figure 2, the network device 110 transmits an SRS transmission setting (for convenience, also referred to herein as the SRS setting or first setting) to the terminal device 120 (210). In some embodiments, the SRS setting 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 two, and any other suitable number is possible.

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

[0085] In some embodiments, the first information may include the identity (ID) of the TCI state. For example, if two or more TCI states are active, for example, if two or more TCI states are indicated via the TCI field in the DCI, the first information may include information about "using the first TCI state" and "using the second TCI state," or, as a whole, information about "which TCI state to use."

[0086] In some embodiments, the first information may include an association between the identity of an SRS resource set and the identity of a TCI state. In other words, the first information may be sorted by a mapping between SRS resource set IDs and TCI state IDs, for example, a first SRS resource set ID is explicitly or implicitly associated with a 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 default rules (i.e., not limited to cases where the TCI state is indicated via a TCI field in the DCI).

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

[0088] In some embodiments, the first information includes a first value of a power control adjustment state, the first value indicating the TCI state used for the PC. In other words, the first information may include a setting of power control adjustment states (e.g., srs-PowerControlAdjustmentStates). The parameter "srs-PowerControlAdjustmentStates" may have different values ​​for two SRS resource sets, for example, "sameAsFci1" and "sameAsFci2", or "sameAsFci2" and none. Alternatively, the parameter "srs-PowerControlAdjustmentStates" may be 0 and 1 for two SRS resource sets, respectively. 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, where l may take the values ​​of 0 and 1 for the two SRS resource sets, respectively.

[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 / BWP / bandwidth. In some embodiments, the first information (e.g., useIndicatedTCIState) may include more detailed information, such as using the indicated TCI states to determine QCL type A / B / C / D parameters, UL Tx beam, UL Tx power, PL RS, alpha, closedloopindex, and P0, respectively.

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

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

[0092] The network device 110 may also transmit instructions indicating PC information (referred to herein, for convenience, also as second instructions) (240). For example, the network device 110 may transmit a DCI scheduling a PUSCH transmission, in which the SRI field indicates the PC settings. It should be understood that the second instructions may be transmitted in any other suitable manner.

[0093] Instead, the terminal device 120 receives the first instruction and the second instruction. In this case, as shown in Figure 2, the terminal device 120 may decide which of the first and second instructions to use on the PC (250).

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

[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 status and SRI in DCI point to the same parameter values, e.g., RS ID, estimated PL, and ultimately the same Tx power. In this case, the terminal device 120 may decide on either the first or second instruction.

[0096] In some embodiments, the first setting (i.e., SRS setting) includes first information of the TCI state used for the 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 with Figure 2, the terminal device 120 may determine the transmit power for the PUSCH transmission (also referred to as the first transmit 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 application timing of the two DCIs and PL RS may be considered.

[0098] In some embodiments where the first instruction (i.e., TCI status) 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 timing for applying the PC information indicated by the first instruction. Figure 3A shows an exemplary scenario 300A of application timing according to some embodiments of the present disclosure.

[0099] In the example in Figure 3A, at timing t1, the terminal device 120 may receive a DCI for beam indication, the DCI including one or more TCI fields. At timing t2, the terminal device may receive a DCI for scheduling a PUSCH transmission at timing t3, the DCI including one or more SRI fields. In this case, the terminal device 120 may ignore the PC information indicated by the received SRI during t1 + application 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 application timing represents the signaling decoding timing, panel switching timing, beam application timing, PL RS application timing, PUSCH preparation timing, or any other suitable timing, or any combination of the above timings, or the largest of the above timings.

[0100] 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 override the PC information indicated by the second instruction with the PC information indicated by the first instruction before the timing for applying the PC information indicated by the second instruction. Figure 3B shows another exemplary scenario 300B of the application timing according to some embodiments of the present disclosure.

[0101] In the example of Figure 3B, at timing t4, the terminal device may receive a DCI scheduling a PUSCH transmission at timing t6, the DCI including one or more SRI fields. At timing t5, the terminal device 120 may receive a DCI for beam indication, the DCI including one or more TCI fields. In this case, the terminal device 120 may override the PC information indicated by the SRI with the PC information indicated by the TCI status, even before t4+ application time, i.e., it may ignore the PC information indicated by the SRI during the t4+ application timing, 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 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 largest of the above timings.

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

[0103] In the example in Figure 3C, at timing t7, terminal device 120 may receive a DCI for beam indication, the DCI containing one or more TCI fields. At timing t8, terminal device 120 may receive a DCI for scheduling a PUSCH transmission at timing t9, the DCI containing one or more SRI fields. In this case, terminal device 120 may override the PC information indicated by the TCI status with the PC information indicated by the SRI, even before t7+ application time, i.e., ignore the PC information indicated by the TCI status during t10+ application timing, where t7 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 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 largest of the above timings.

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

[0105] In the example in Figure 3D, at timing t10, the terminal device may receive a DCI scheduling a PUSCH transmission at timing t12, the DCI including one or more SRI fields. At timing t11, the terminal device 120 may receive a DCI for a beam indication change, the DCI including one or more TCI fields. In this case, the terminal device 120 may ignore the PC information indicated by the TCI status during t10 ​​+ application timing, where t10 represents the time when the DCI for the beam indication change is received or the time 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 largest of the above timings.

[0106] It should be understood that Figures 3A–3D are merely examples and do not limit the scope of this disclosure.

[0107] Based on the determined PC information (e.g., PC parameter settings and PL RS), the terminal device 120 may calculate the transmit power for a PUSCH transmission. In some embodiments, when the terminal device 120 transmits a PUSCH on the active UL BWP b of the carrier f of the serving cell c, using a parameter set setting having index j and a PUSCH power control adjustment state having index l, the terminal device 120 may determine the PUSCH transmit power in the PUSCH transmission opportunity i as shown in equation (2) below.

number

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

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

[0110] 2. UL PC for SRS Transmission Continuing to refer to FIG. 2, the terminal device 120 may also determine the transmission power of the SRS transmission (for convenience, also referred to as the second transmission power in this specification) (270). [[ID=二十九]]

[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. Further, the terminal device 120 may determine the transmission power of the 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 enabled. In this case, if an individual TCI state is set for an SRS resource, the transmit power may be determined based on that individual TCI state. If no individual TCI state is set for an SRS resource, the transmit power may be determined based on some default rules described later.

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

number

[0114] It should be understood that equation (3) is merely one example, and any other suitable method is possible.

[0115] This enables rapid updating of UL transmit power when one or more UL beams are changed.

[0116] 3. UL PC for sending PRACH Continuing with reference to Figure 2, the terminal device 120 may also determine the transmit power of the PRACH transmission (for convenience, also referred to herein as the third transmit power) (280). In some embodiments, once the PRACH transmit power is determined, an integrated TCI state may be provided for reference signal power selection. In some embodiments, if two or more TCI states are active for a PDCCH carrying a PDCCH order, the PDCCH order may provide reference signal power selection information.

[0117] In some embodiments, the terminal device 120 may receive from the network device 110 information (also referred to herein as second information for convenience) that includes at least one of the TCI states used for determining the reference signal power or the TCI states used for determining the PL RS (281). The terminal device 120 may also determine the transmit power of the PRACH transmission (also referred to herein as third transmit power for convenience) based on the second information (282).

[0118] In some embodiments, if there are two or more active TCI states for a PDCCH that provide a PDCCH order, the terminal device 120 anticipates that the PDCCH order will provide information about which TCI state is used for reference signal power determination, for example, which RS the terminal device 120 will use when applying the value provided by powerControlOffsetSS. That is, the terminal device 120 anticipates that the PDCCH order will provide information about which TRP the PRACH was sent to, or which RS was used as the PL RS.

[0119] Such information may be indicated through additional fields within the PDCCH order. Alternatively, such information may be implicitly indicated through existing fields, such as the random access preamble index, SS / PBCH index, and PRACH mask index. The associations between these indices and TRPs must be pre-configured. In some embodiments, the second information may include the configuration of associations between these indices and TRPs, for example, associations between these indices and CORESET / CORESET group / search space sets. Alternatively, some default rules may be applied for selection, as described later.

[0120] In some embodiments, the terminal device 120 anticipates that an active TCI state for a PDCCH that provides a PDCCH order will be associated with a PL RS, and that the associated PL RS will be used for PL estimation, including reference signal power selection and RSRP measurement. In some embodiments, the terminal device 120 anticipates that an active TCI state for a PDCCH that provides a PDCCH order will provide 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 determining the reference signal power is associated with a cell different from the serving cell of the terminal device 120 (for convenience, also referred to herein as the first cell), the terminal device 120 may obtain the reference signal power (e.g., ss-PBCH-BlockPower) from the first cell.

[0122] In some embodiments, when terminal device 120 transmits PRACH on the active UL BWP b of the carrier f of serving cell c, terminal device 120 may determine the PRACH transmission power at the PRACH transmission opportunity i as shown in equation (4) below.

number

[0123] It should be understood that equation (4) is merely one example, and any other suitable method is 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, power control parameter settings may not be provided by the applied TCI state. In this case, terminal device 120 may determine the power control parameter settings using 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 a TCI state that includes a power control setting ID. In other words, the terminal device 120 may determine the power control parameter setting based on a different TCI state. For example, the terminal device 120 may determine the power control parameter setting based on a TCI state applied to an associated CORESET. As another example, the terminal device 120 may determine the power control parameter setting based on a TCI state applied to a CORESET having a specific ID, e.g., 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 a TCI state having a specific ID, e.g., the lowest ID or the lowest N IDs.

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

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

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

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

[0131] In some embodiments, the terminal device 120 may determine the PL RS based on a TCI state that includes the setting of the PL RS. In other words, the terminal device 120 may determine the PL RS based on a different TCI state. For example, the terminal device 120 may determine the PL RS based on a TCI state applied to the associated CORESET. As another example, the terminal device 120 may determine the PL RS based on a 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 a different 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 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 random access procedures within a certain period. For example, the terminal device 120 may determine the PL RS based on the last PL RS applied to a 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 random access procedures.

[0134] It should be understood that any combination of the above and any other appropriate 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, if the first TCI state is not associated with 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, if the second TCI state is not associated with 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, if both the first and second TCI states are not associated with 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 RS.

[0136] Thus, even if PC information is not provided due to the applied TCI status, the terminal device can correctly find the PC information.

[0137] Exemplary Embodiments of UL PC for STxMP For illustrative purposes, we will first provide some explanations regarding the STxMP-MTRP scheme and UE power classes, as follows.

[0138] The STxMP-MTRP method may include any of the following: • SDM method: Different layers / DMRS ports on a single pusher are precoded separately and transmitted simultaneously from different UE panels. • FDM-B method: Two Push transmit opportunities with the same TB and the same / different RV are transmitted from different UE panels on non-overlapping frequency-domain resources and the same time-domain resources. • FDM-A method: Different portions of the frequency domain resources of a single push transmission opportunity are transmitted from different UE panels. • SFN-based transmission method: All of the same layer / DMRS ports on one pusher are transmitted simultaneously from two different UE panels. • SDM Repetition Method: Two push transmission opportunities with the same / different RVs for the same TB are transmitted simultaneously from two different UE panels.

[0139] Table 1 below shows an example of a UE type. [Table 1]

[0140] Table 2 below shows an example of UE maximum output power limits for UL MIMO for power class 1. [Table 2]

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

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

[0143] Under some assumptions, the total power limit per UE on all UE panels used for STxMP, or the sum of the power limits per panel for STxMP, may differ from existing power limits for a given power class (e.g., it may be greater than or equal to a certain value). Under some assumptions, the total power limit per UE on all UE panels used for STxMP, or the sum of the power limits per panel for STxMP, may not differ from existing power limits for a given power class (e.g., it may be less than or equal to a certain value). Under some assumptions, the sum of the power limits per panel may be greater than the total power limit per UE. Under some assumptions, the sum of the power limits per panel may be less than or equal to the total power limit per UE.

[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 illustrative purposes, the process 400 will be described with reference to Figures 1A-1C. In this example, the terminal device 120 is provided with panels 125-1 and 125-2. It should be understood that the process 400 may be applied to more panels.

[0145] Referring to Figure 4, the terminal device 110 may transmit UE capability information to the network device 120 (405). For example, the network device 120 may transmit radio resource control (RRC) settings related to UE capability reporting to the terminal device 110. The terminal device 110 may report its capabilities to the network device 120 based on the RRC settings.

[0146] In some embodiments, the UE capability report may include at least one of the following: 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 transmit power calculation As shown in Figure 4, the network device 110 may transmit an STxMP instruction to the terminal device 120 (410). In some embodiments, the STxMP instruction may include an instruction for an STxMP-MTRP scheme, such as an SDM scheme, FDM-B scheme, FDM-A scheme, SFN-based transmission scheme, or SDM repeating scheme. In some embodiments, the STxMP instruction may include a switch between a non-STxMP mode and an STxMP mode. It should be understood that the STxMP instruction may further include any other appropriate information.

[0148] Upon instruction, 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 transmit power of the uplink transmission based on at least one power limit for the panels (420).

[0149] Power limit per panel In some embodiments where a 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 UE capability reports or PHR reports.

[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 (first Pcmax + second Pcmax) ≤ Pcmax. The two panels may be extended to N panels, where it should be understood that N is greater than 2.

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

[0154] Furthermore, 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 limiting without power sharing between panels In some embodiments where cross-panel power limiting is used, the power limiting may include a threshold power (e.g., Pcmax). In some embodiments, the threshold power may be based on a 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 is the number of panels used for simultaneous transmission. Alternatively, N may be the total number of panels in the UE. In some embodiments, N may be based on information provided via a UE capability report or PHR report.

[0157] Furthermore, the terminal device 120 may determine the transmit power for panel 125-1 based on the scaled threshold power, and the transmit power for panel 125-2 based on the scaled threshold power. For example, the terminal device 120 may determine the transmit power for panel 125-1 and the transmit power for panel 125-2, respectively, based on equation (2) above. The parameters in equation (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 limiting with power sharing between panels In some embodiments where cross-panel power limiting is used, the power limiting may include a threshold power (e.g., Pcmax). In some embodiments, the threshold power may be based on a currently defined UE power class.

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

number

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

number

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

[0163] If the total value is greater than the threshold power, the terminal device 120 may determine the scaled transmit power for panel 125-1 based on the transmit power for panel 125-1 and the ratio of the threshold power to the total value. For example, the terminal device 120 may determine the scaled transmit power for panel 125-1 based on the following equation (7).

number

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

number

[0165] Furthermore, the terminal device 120 may determine the transmission power for 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 UL power without violating the limits on maximum radiated power.

[0167] 2.UL DMRS power calculation Continuing with reference to Figure 4, the terminal device 120 may determine the transmit power for RS transmission (also referred to herein as second transmit power for convenience) based on at least one power limit, the transmit power for UL transmission, and the ratio of power-related parameters for UL transmission and RS transmission (430). According to embodiments of the present disclosure, the ratio of power-related parameters for UL transmission and RS transmission is determined based on at least one power limit.

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

[0169] In some embodiments where cross-panel power limiting is used, if 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 for which data is unavailable.

[0170] In some embodiments where power limits per panel are 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, power boosting per panel may be performed using "PUSCH-DMRS power ratio per panel" or "PUSCH-DMRS power ratio per layer" or "PUSCH-DMRS power ratio per panel / layer" or "PUSCH-DMRS EPRE ratio per panel" or "PUSCH-DMRS EPRE ratio per layer" or "PUSCH-DMRS EPRE ratio per panel / layer" or "PUSCH-DMRS EPRE ratio per panel / layer" instead of "PUSCH-DMRS EPRE ratio".

[0172] In some embodiments, the terminal device 120 may determine a first Push-to-DMRS power ratio for panel 125-1 based on the number of DMRS CDM groups for which there is no data associated with panel 125-1. In some embodiments, the terminal device 120 may determine the first Push-to-DMRS power ratio by searching a table containing a mapping between the Push-to-DMRS power ratio for a panel and the number of DMRS CDM groups for which there is no data associated with the panel. In some embodiments, the terminal device 120 may determine the first Push-to-DMRS power ratio by calculating a value (represented as R) based on the following formula (8') and 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. TIFF0007831680000017.tif20168 Here, R represents the median value for calculating the PUSCH vs. DMRS power ratio, and X represents the number of DMRS CDM groups for which data is unavailable associated with the panel.

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

[0174] Similarly, the terminal device 120 may determine a second Push-to-DMRS power ratio for panel 125-2 based on the number of DMRS CDM groups for which there is no data associated with panel 125-2. In some embodiments, the terminal device 120 may determine the second Push-to-DMRS power ratio by searching a table containing a mapping between the Push-to-DMRS power ratio for a panel and the number of DMRS CDM groups for which there is no data associated with the panel. In some embodiments, the terminal device 120 may determine the second Push-to-DMRS power ratio by calculating an R value based on equation (8') and 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.

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

[0176] Table 3 below shows example values ​​for the "Antenna Port" field. [Table 3] Table 4 below shows an example of the PUSCH-DMRS EPRE ratio. [Table 4] Table 5 below shows illustrative relationships between ports, CDM groups, and panels. [Table 5]

[0177] Tables 3-5 are merely examples, and it should be understood that any other suitable method is 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", and "3", which may correspond to CDM groups 0, {0,1}, and {0,1,2}, respectively.

[0179] If the value of the "antenna ports" field is "2", then from Table 3 we can see that the number of DMRS CDM groups without data is "2", and the number of DMRS ports is 0. Also from Table 4 we can see 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 groups are {0,1}. From Table 5 we can see that ports 0 and 1 are associated with one panel (e.g., panel 125-1), and ports 2 and 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 ports 2 and 3 are associated with another panel, power may not be used for DMRS power boosting, i.e., 0 dB is assumed. The total power for the two panels remains unchanged for DMRS and PUSCH, and the EPRE ratio is currently 0 dB. However, for the DMRS-PUSCH power ratio per panel, DMRS may be transmitted 3 dB higher than PUSCH.

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

[0182] Embodiment 2 In this embodiment, the terminal device may continue to use the "PUSCH-DMRS EPRE ratio" and count the "number of DMRS CDM groups without data" by considering 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. 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 may determine the number of updated DMRS CDM groups without data.

[0184] In some embodiments, the number of DMRS CDM groups for which updated data is unavailable may be determined by the following formula (9).

number

[0185] In some embodiments, the number of DMRS CDM groups for which updated data is unavailable may be determined by the following formula (10).

number

[0186] It should be understood that formulas (9) and (10) are merely examples, and any other suitable method is possible. This disclosure is not limited to such embodiments.

[0187] Furthermore, the terminal device 120 may determine the PUSCH vs. DMRS power ratio based on the number of DMRS CDM groups for which updated data is unavailable. In some embodiments, the terminal device 120 may determine the PUSCH vs. DMRS power ratio by searching a table. In some embodiments, the terminal device 120 may determine the PUSCH vs. DMRS power ratio by calculating the R value based on equation (8') and rounding up or down the R value, or by taking a predetermined number of decimal places for the R value.

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

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

[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, i.e., power boosting is not permitted.

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

[0192] In some embodiments, where cross-panel power limiting is assumed and power sharing between panels is permitted, a conventional boosting ratio may be assumed.

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

[0194] 3.UL PTRS power calculation In some embodiments, RS transmission may be phase tracking reference signal (PTRS) transmission, and the ratio of power-related parameters may be a PUSCH-to-PTRS power ratio. In some embodiments, the PUSCH-to-PTRS power ratio may be a PUSCH-to-PTRS power ratio per layer. It should be understood that the PUSCH-to-PTRS power ratio may also take 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 configuration, and is used to boost PTRS power when the corresponding resource element is not used for data transmission.

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

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

[0198] In some embodiments, the terminal device 120 may determine a first PUSCH to PTRS power ratio per layer by searching a table that includes a 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 determine the first PUSCH-to-PTRS power ratio per layer by calculating a value (represented as R') based on the following formula (10'), and 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 appropriate positive integer. TIFF0007831680000023.tif21168 Here, R' represents an intermediate value for calculating the PUSCH vs. PTRS power ratio per layer, and X' represents the number of PUSCH layers associated with the panel.

[0200] Furthermore, the terminal device 120 may determine the transmission power of the first PTRS transmission via 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 relating to the PUSCH vs. PTRS power ratio per RE per layer. [Table 6]

[0202] For example, in STxMP SDM transmission (and of course, not limited to this mode), layers 1 and 2 come from panel 1, and layers 3 and 4 come from panel 2. When determining the PUSCH vs. PTRS power ratio, the number of PUSCH layers becomes 2, not 4. From Table 6, it can be seen that the ratio should be 3 dB, not 6 dB. It should be understood that this is just one example and the disclosure is not limited thereto.

[0203] Similarly, the terminal device 120 may determine the number of PUSCH layers allocated to panel 125-2 (for convenience, also referred to herein as the second number of PUSCH layers) and, based on the second number of PUSCH layers, 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 containing a mapping between 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 may calculate a value (represented as R') based on equation (10') and determine the second PUSCH to PTRS power ratio per layer 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.

[0204] Furthermore, 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 transmit power of a PTRS transmission based on the transmit power for the first PTRS transmission and the transmit power for the second PTRS transmission.

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

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

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

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

[0210] 4. PHR Calculation and Reporting Continuing with reference to Figure 4, the terminal device 120 may determine the power headroom (PH) for UL transmission, taking into account the power consumption of the panel for simultaneous transmission (450). The terminal device 120 may also send a power headroom report (PHR) to the network device 110 (460). For illustrative purposes, several 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 limit per panel In some embodiments where per-panel power limit 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 limit 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 limiting includes threshold powers for panels 125-1 and 125-2.

[0217] In some embodiments where power sharing is not permitted, the terminal device 120 may determine the 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 transmit power of the first UL transmission through panel 125-1. For example, the first PH may be determined by the following equation (13).

number

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

number

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

[0220] In some embodiments where power sharing is permitted, 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 a UL transmission based on a threshold power and the sum of the transmit power of a first UL transmission via panel 125-1 and the transmit power of a second UL transmission via panel 125-2. For example, the PH may be determined by the following equation (15).

number

[0221] Furthermore, terminal device 120 may report PH. It should be understood that formula (15) is merely an example, and any other appropriate form is possible.

[0222] Embodiment 5 In this embodiment, PHR may be determined based on reference transmission. The assumed Pcmax is Represented as TIFF0007831680000030.tif12168, the power consumption is based on a reference transmission with several assumed values. For example, the transmission power for panel 1 may be calculated based on the following equation (16).

number

[0223] The transmission power for panel 2 may be calculated based on the following formula (17).

Equation

[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 the first threshold power for panel 125-1 and the 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 and a transmit power of a first UL transmission via panel 125-1. For example, the first PH may be determined by the following equation (18).

number

[0226] Similarly, the terminal device 120 may determine a second PH for panel 125-2 based on a second threshold power and a transmit power for a second UL transmission via panel 125-2. For example, the second PH may be determined by the following equation (19).

number

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

[0228] Cross panel power limit 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 sum of Tx RS from the two panels. In some embodiments, the power limiting includes threshold powers for panels 125-1 and 125-2.

[0229] In some embodiments, the terminal device 120 may determine the PH for UL transmission based on a threshold power and the sum 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

[0230] Furthermore, terminal device 120 may report PH. It should be understood that formula (20) is merely an example, and any other appropriate form is possible.

[0231] In some embodiments, several assumptions may be provided for STxMP. For example, P O_NOMINAL,PUSCH,f,c (0 or 1) and p0-PUSCH-AlphaSetId=0 or 1, PL b,f,c (q d ) is obtained using push-PathlossReferenceRS-Id=0 or 1, and for panel 1 and panel 2, l=0 or 1, respectively. Furthermore, q d These are q d,panel1 , q d,panel2That is, it may be a panel-specific PLRS.

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

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

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

[0235] In this way, it becomes possible to report accurate PH values ​​to the network.

[0236] Exemplary Embodiments of the Method Therefore, embodiments of this disclosure provide communication methods implemented in terminal devices and network devices. These methods will be described below with reference to Figures 5-7.

[0237] Figure 5 shows exemplary communication methods 500 implemented in a terminal device according to some embodiments of the present disclosure. For example, method 500 may be implemented in a terminal device 120 as shown in Figures 1A-1C. For illustrative purposes, method 500 will be described with reference to Figures 1A-1C. It should be understood that method 500 may include additional blocks not shown and / or some blocks shown may be omitted, and the scope of the present disclosure is not limited in this respect.

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

[0239] In block 520, the terminal device 120 determines whether a first instruction indicating an active TCI state and a second instruction indicating power control information have been received. If the first and second instructions have been received, method 500 proceeds to block 530.

[0240] In block 530, the terminal device 120 determines one of the first instruction and the second instruction to be used in power control.

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

[0242] In some embodiments, the first setting includes first information of 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 instruction, and determine a second transmit power for SRS transmission based on the power control information associated with the TCI state.

[0243] In some embodiments, the first information includes at least one of the following: the identity of a TCI state; the association between the identity of an SRS resource set and the identity of a TCI state; the association between the identity of an SRS resource set and the identity of a TRP or CORESET or CORESET group or search space set; and the association between the identity of a TRP or CORESET or CORESET group or search space set and the 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 and second instructions. In some embodiments, the first and second instructions 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 timing for applying 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 timing for applying 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 timing for applying 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 timing for applying the power control information indicated by the first instruction.

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

[0248] In some embodiments, if the TCI state used for determining the reference signal power 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, if a power control parameter setting is not provided by a TCI state determined based on a first setting and a second setting and one of the first and second instructions, the terminal device 120 may determine the power control parameter setting based on at least one of the following: 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. In some embodiments, the TCI state including the identity of the power control setting includes at least one of the following: a TCI state applied to a CORESET associated with a PUSCH transmission, a TCI state applied to a CORESET having a predetermined identity, or a TCI state having a predetermined identity.

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

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

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

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

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

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

[0256] In some embodiments, the first information includes at least one of the following: the identity of a TCI state, the association between the identity of an SRS resource set and the identity of a TCI state, the association between the identity of an SRS resource set and the identity of a TRP or CORESET or CORESET group or search space set, and the association between the identity of a TRP or CORESET or CORESET group or search space set and the identity of a TCI state, or a first value of a power control adjustment state, wherein 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 the following: a TCI state used for determining the reference signal power, or a TCI state used for determining the path loss reference signal.

[0258] Figure 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 implemented in a terminal device 120 as shown in Figures 1A-1C. For illustrative purposes, method 700 will be described with reference to Figures 1A-1C. It should be understood that method 700 may include additional blocks not shown and / or some blocks shown may be omitted, and the scope of the present disclosure is not limited in this respect.

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

[0260] In block 720, the terminal device 120 determines a first transmit 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 transmit power for reference signal transmission based on at least one power limit, the first transmit power, and a ratio of power-related parameters between uplink transmission and reference signal transmission, which is determined based on at least one power limit.

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

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

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

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

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

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

[0268] In some embodiments where the reference signal transmission is a 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 may determine a first number of PUSCH layers allocated to the first panel and a second number of PUSCH layers allocated to the second panel, determine a first PUSCH to PTRS power ratio per layer for the first panel based on the first number of PUSCH layers, determine a second PUSCH to PTRS power ratio per layer for the second panel based on the second number of PUSCH layers, determine 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, determine 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 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 may determine the number of PUSCH layers, determine the PUSCH to PTRS power ratio per panel per resource element per layer based on the number of PUSCH layers, and 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 a first panel and a second threshold power for a second panel, the terminal device 120 may determine a first power headroom for the first panel based on the first threshold power and the transmit power of a first uplink transmission through the first panel, and determine a second power headroom for the second panel based on the second threshold power and the transmit power of a second uplink transmission through the second panel, and report the first power headroom and the second power headroom.

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

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

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

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

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

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

[0278] As illustrated, the device 800 comprises a processor 810, a memory 820 coupled to the processor 810, appropriate transmitters (TX) and receivers (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 the program 830. The TX / RX 840 is used for bidirectional communication. The TX / RX 840 has at least one antenna to facilitate communication, although the access node 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 bidirectional communication between eNBs, an S1 interface for communication between a Mobility Management Entity (MME) / Serving Gateway (S-GW) and an eNB, an 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, enable the device 800 to operate according to embodiments of the present disclosure, as described herein with reference to Figures 1A to 7. Embodiments of the present disclosure may be implemented by computer software executable by the processor 810 of the device 800, by hardware, or by a combination of software and hardware. The processor 810 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 810 and memory 820 may form a processing means 850 suitable for implementing various embodiments of the present disclosure.

[0280] Memory 820 may be of any type suitable for a local technology network and may be implemented using any suitable data storage technology, such as non-temporary computer-readable storage media, semiconductor-based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. Although only one memory 820 is shown in device 800, there may be several physically different memory modules in device 800. Processor 810 may be of any type suitable for a local technology network and may include, as non-limiting examples, one or more of general-purpose computers, dedicated computers, microprocessors, digital signal processors (DSPs), and processors based on multicore processor architectures. Device 800 may have multiple processors, for example, application-specific integrated circuit chips that are temporally dependent on a clock that synchronizes the main processor.

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

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

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

[0284] As used herein, the term “circuit” may mean hardware circuitry and / or a combination of hardware circuitry and software. For example, a circuit may be a combination of analog and / or digital hardware circuitry and software / firmware. In 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 works together to cause a device such as a terminal or 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 it is not required for operation. As used herein, the term “circuit” may include hardware circuitry or one or more processors alone, or a part of hardware circuitry or one or more processors and their (or their) accompanying software and / or firmware implementations.

[0285] Overall, various embodiments of the Disclosure may be implemented in hardware or dedicated circuitry, software, logic, or any combination thereof. Some embodiments may be implemented in hardware, while others may be implemented in firmware or software that can be executed by a controller, microprocessor, or other computing device. Although various embodiments of the Disclosure are illustrated and described using block diagrams, flowcharts, or any other pictorial representation, it should be understood that any blocks, devices, systems, techniques, or methods described herein may be implemented, in non-limiting examples, in hardware, software, firmware, dedicated circuitry or logic, general-purpose hardware or controllers or other computing devices, or any combination thereof.

[0286] This disclosure also provides at least one computer program product tangibly stored on a non-temporary computer-readable storage medium. The computer program product includes computer-executable instructions, such as instructions contained in a program module, which are executed within a device on a real or virtual processor of interest to perform the processes or methods described above with reference to Figures 1A to 7. Generally, a program module includes routines, programs, libraries, objects, classes, components, data structures, etc., that perform a specific task or realize a specific abstract data type. In various embodiments, the functions of program modules may be combined or separated among program modules as needed. The machine-executable instructions of a program module may be executed within a local or distributed device. In a distributed device, program modules may reside in both local and remote storage media.

[0287] Program code for performing the methods of this disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a dedicated computer, or other programmable data processing device, and when executed by the processor or controller, the program code may implement the functions / operations specified in the flowcharts and / or block diagrams. The program code may run entirely on a machine, partially on a machine, as an independent software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0288] The program code described above may be implemented on a machine-readable medium, which may be any tangible medium that can contain or store programs used by or associated with 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, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or apparatus, or any suitable combination of the aforementioned mediums. More specific examples of machine-readable storage media may include electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above.

[0289] While the operations have been described in a specific order, it should not be understood that, in order to obtain the desired results, these operations must be performed in the specific order or sequence indicated, or that all described operations must be performed. In some cases, multitasking and parallel processing may be advantageous. Similarly, while some specific implementation details are included in the above discussion, these should not be interpreted as limitations on the scope of this disclosure, but rather as descriptions of features that may be specific to particular embodiments. Some features described in the context of individual embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may be implemented separately or in any suitable subcombination in multiple embodiments.

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

Claims

1. A terminal device, Means for receiving first information of the physical downlink control channel (PDCCH) order from a network device in a serving cell, The system comprises means for determining the transmission power of a physical random access channel (PRACH) transmission based on the first information, The PDCCH order includes a field indicating a reference signal for path loss estimation to determine the transmit power of the PRACH transmit, If the PDCCH order is associated with a first cell different from the serving cell, the reference signal power for path loss estimation is obtained from the first cell. Terminal device.

2. The aforementioned reference signal is one of the multiple reference signals for path loss estimation. The terminal device according to claim 1.

3. The PDCCH order is Downlink Control Information (DCI) format 1_0. The terminal device according to claim 1.

4. The PDCCH order further includes a field for the random access preamble index, a field for the synchronization signal / physical broadcast channel (SS / PBCH) index, and a field for the PRACH mask index. The terminal device according to claim 1.

5. The aforementioned reference signal corresponds to the pseudo-collocation (QCL) information for the PDCCH order, The terminal device according to claim 1.

6. Means for receiving second information from the network device, including a first instruction regarding the status of the transmission configuration indicator (TCI) and a second instruction corresponding to the sounding reference signal resource indicator (SRI), Means for determining one of the first and second instructions regarding the transmit power of a physical uplink shared channel (PUSCH) transmission, The terminal device according to claim 1, comprising:

7. The first instruction has a higher priority than the second instruction for determining the transmit power of the PUSCH transmission. The terminal device according to claim 6.

8. Network device, A terminal device provides means for transmitting first information of physical downlink control channel (PDCCH) order in a serving cell, The system comprises means for receiving physical random access channel (PRACH) transmissions, The transmission power of the PRACH transmission is determined based on the first information. The PDCCH order includes a field indicating a reference signal for path loss estimation to determine the transmit power of the PRACH transmit, If the PDCCH order is associated with a first cell different from the serving cell, the reference signal power for path loss estimation is obtained from the first cell. Network device.

9. The aforementioned reference signal is one of the multiple reference signals for path loss estimation. The network device according to claim 8.

10. The PDCCH order is Downlink Control Information (DCI) format 1_0. The network device according to claim 8.

11. The PDCCH order further includes a field for the random access preamble index, a field for the synchronization signal / physical broadcast channel (SS / PBCH) index, and a field for the PRACH mask index. The network device according to claim 8.

12. The aforementioned reference signal corresponds to the pseudo-collocation (QCL) information for the PDCCH order, The network device according to claim 8.

13. A method performed by a terminal device, The network device receives the first information of the physical downlink control channel (PDCCH) order in the serving cell, This includes determining the transmission power for a physical random access channel (PRACH) transmission based on the first information, The PDCCH order includes a field indicating a reference signal for path loss estimation to determine the transmit power of the PRACH transmit, If the PDCCH order is associated with a first cell different from the serving cell, the reference signal power for path loss estimation is obtained from the first cell. method.

14. A method performed by a network device, The terminal device transmits the first information of the physical downlink control channel (PDCCH) order in the serving cell, This includes receiving a physical random access channel (PRACH) transmission, The transmission power of the PRACH transmission is determined based on the first information. The PDCCH order includes a field indicating a reference signal for path loss estimation to determine the transmit power of the PRACH transmit, If the PDCCH order is associated with a first cell different from the serving cell, the reference signal power for path loss estimation is obtained from the first cell. method.

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