WO2021022513A1

WO2021022513A1 - Methods, apparatus and systems for reporting a power headroom for an uplink transmission

Info

Publication number: WO2021022513A1
Application number: PCT/CN2019/099597
Authority: WO
Inventors: Chenchen Zhang; Peng Hao; Xingguang WEI; Yu Ngok Li; Ke YAO
Original assignee: Zte Corporation
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2021-02-11
Also published as: CN114175766A; CN114175766B

Abstract

Methods, apparatus and systems for reporting a power headroom for an uplink transmission are disclosed. In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: determining a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by the wireless communication device; determining at least one power headroom report (PHR) for the plurality of uplink transmissions from the wireless communication device to a wireless communication node; generating a power headroom report (PHR) medium access control (MAC) control element (CE) for reporting the at least one PHR; and determining, from the plurality of uplink transmissions, an uplink transmission for carrying the PHR.

Description

METHODS, APPARATUS AND SYSTEMS FOR REPORTING A POWER HEADROOM FOR AN UPLINK TRANSMISSION

CROSS-REFERENCE TO RELATED APPLICATION

The present application is related to PCT international application with attorney docket number ZTE-2019-001363-WO/G6418-59900, entitled “METHODS, APPARATUS AND SYSTEMS FOR DETERMINING A POWER HEADROOM FOR AN UPLINK TRANSMISSION, ” filed on August 7, 2019, which is expressly incorporated by reference herein in its entirety.

TECHNICAL FIELD

The disclosure relates generally to wireless communications and, more particularly, to methods, apparatus and systems for reporting a power headroom for an uplink transmission in a wireless communication.

BACKGROUND

In a wireless network, in order for a base station (BS) to understand a terminal’s uplink power usage more accurately, a Power Headroom Report (PHR) mechanism is supported. That is, according to a configuration of the base station, the terminal will report the power headroom (PH) or report both the PH and the maximum transmission power (Pcmax) , when a certain trigger condition is met.

In a fifth-generation (5G) new radio (NR) system or a subsequent evolution system, multiple application types may be supported. For different application scenarios, the requirements for the PHR mechanism may be different. For example, an ultra-reliable low latency communications (URLLC) scenario may need a more accurate and timely PHR trigger mechanism, because of its higher reliability requirement. An enhanced mobile broadband (eMBB) scenario does not require a very high reliability, and may not require a PHR triggering mechanism that is too frequent. Different application scenarios may have different power control parameter ranges, so that the calculation of PHR is also different for different application types. In addition, for a physical uplink shared channel (PUSCH) scheduled by grant and a configured grant PUSCH, the power control parameter configurations may also be different, and thus their calculations of PHRs are also different. Existing methods of reporting PHR have not taken into account a situation when a same terminal supports different application scenarios that can correspond to different power control parameter configurations.

Thus, existing systems and methods for reporting a power headroom for an uplink transmission in a wireless communication are not entirely satisfactory.

SUMMARY OF THE INVENTION

The exemplary embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, exemplary systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and not limitation, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of the present disclosure.

In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises: determining a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by the wireless communication device; determining at least one power headroom report (PHR) for the plurality of uplink transmissions from the wireless communication device to a wireless communication node; generating a power headroom report (PHR) medium access control (MAC) control element (CE) for reporting the at least one PHR; and determining, from the plurality of uplink transmissions, an uplink transmission for carrying the PHR.

In a further embodiment, a method performed by a wireless communication node is disclosed. The method comprises: scheduling a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by a wireless communication device; and receiving, from the wireless communication device, an uplink transmission determined from the plurality of uplink transmissions for carrying a power headroom report (PHR) medium access control (MAC) control element (CE) comprising a report of at least one power headroom (PH) . The at least one PHR is determined for the plurality of uplink transmissions from the wireless communication device to the wireless communication node. Throughout the present disclosure, the terms “PH” and “PHR” may be used interchangeably.

In a different embodiment, a wireless communication node configured to carry out a disclosed method in some embodiment is disclosed. In yet another embodiment, a wireless communication device configured to carry out a disclosed method in some embodiment is disclosed. In still another embodiment, a non-transitory computer-readable medium having stored thereon computer-executable instructions for carrying out a disclosed method in some embodiment is disclosed. The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

Various exemplary embodiments of the present disclosure are described in detail below with reference to the following Figures. The drawings are provided for purposes of illustration only and merely depict exemplary embodiments of the present disclosure to facilitate the reader's understanding of the present disclosure. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present disclosure. It should be noted that for clarity and ease of illustration these drawings are not necessarily drawn to scale.

FIG. 1 illustrates an exemplary communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure.

FIG. 2 illustrates a block diagram of a base station (BS) , in accordance with some embodiments of the present disclosure.

FIG. 3 illustrates a flow chart for a method performed by a BS for uplink data transmission, in accordance with some embodiments of the present disclosure.

FIG. 4 illustrates a block diagram of a user equipment (UE) , in accordance with some embodiments of the present disclosure.

FIG. 5 illustrates a flow chart for a method performed by a UE for reporting a power headroom report (PHR) , in accordance with some embodiments of the present disclosure.

FIG. 6 illustrates an exemplary method for determining an uplink transmission for carrying power headroom report, in accordance with some embodiments of the present disclosure.

FIG. 7 illustrates another exemplary method for determining an uplink transmission for carrying power headroom report (PHR) , in accordance with some embodiments of the present disclosure.

FIG. 8 illustrates an exemplary method for determining whether a PHR is an actual PHR or a virtual PHR, in accordance with some embodiments of the present disclosure.

FIG. 9 illustrates an exemplary method for determining whether a PHR is an actual PHR or a virtual PHR based on a look-ahead mechanism, in accordance with some embodiments of the present disclosure.

FIG. 10 illustrates another exemplary method for determining whether a PHR is an actual PHR or a virtual PHR based on a look-ahead mechanism, in accordance with some embodiments of the present disclosure.

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS

Various exemplary embodiments of the present disclosure are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present disclosure. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present disclosure. Thus, the present disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Additionally, the specific order and/or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present disclosure. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present disclosure is not limited to the specific order or hierarchy presented unless expressly stated otherwise.

A typical wireless communication network includes one or more base stations (typically known as a “BS” ) that each provides a geographical radio coverage, and one or more wireless user equipment devices (typically known as a “UE” ) that can transmit and receive data within the radio coverage. According to a configuration of the BS, a UE may send a power headroom report (PHR) medium access control (MAC) control element (CE) to the BS. There are three types of the PHR: Type 1 PHR, Type 2 PHR and Type 3 PHR. Type 1 PHR and Type 2 PHR are calculated based on physical uplink shared channel (PUSCH) and/or physical uplink control channel (PUCCH) respectively, without considering sounding reference signal (SRS) . Type 3 PHR is calculated based on sounding reference signal (SRS) and can be applied to a subframe without PUSCH/PUCCH transmission. Each of the three types of PHR is performed at cell level. The UE will calculate the PHR on each cell independently. For a UE supporting multiple cells, once a PHR is triggered in a certain cell, the UE will report the PHR on all or multiple of activated cells to the base station. For an activated cell, a Type 1 PHR or Type 3 PHR will be sent. For a cell that can send PUCCH, it will also feed back Type 2 PHR. For any type of PHR, if the UE actually transmits the corresponding uplink channel or signal, the UE calculates the PHR according to the real-time information of an actual uplink transmission such as the power control parameters and occupied resources of the uplink channel or signal, such calculated PHR is called actual PHR. If the UE does not transmit the corresponding uplink channel or signal, the UE calculates the PHR according to a predefined or pre-configured power control parameters of a reference uplink transmission format, such calculated PHR is called virtual PHR.

A 5G NR system supports two types of the PHRs: Type 1 PHR and Type 3 PHR. Depending on whether the PHR is calculated based on a real transmission, the PHR may be actual or virtual. A UE or terminal can feed back the PHR to the base station in a PHR medium access control (MAC) control element (CE) . If the terminal does not support multiple cells, the terminal feeds back the PHR of a single cell in a Single Entry PHR MAC CE. If the terminal supports multiple cells, the terminal feeds back the PHR to the base station in a Multiple Entry PHR MAC CE.

Different PHRs may be calculated for different application scenarios of a terminal. For a PHR fed back by the terminal to the base station, the present teaching discloses methods for the base station to know the PHR corresponds to which application scenario or application type. By using the methods disclosed in the present teaching, the terminal can determine which type of uplink transmission is used to carrying the PHR feedback; the terminal can determine whether a PHR feedback for a certain Cell is an actual PHR or a virtual PHR; both the terminal and the base station can determine a PHR fed back by the terminal is calculated based on which type of uplink transmission; the terminal can feed back the actual PHR more frequently, so that the base station can obtain more accurate power headroom information; the terminal can reduce the PHR feedback overhead and save uplink resources.

The methods disclosed in the present teaching can be implemented in a wireless communication network, where a BS and a UE can communicate with each other via a communication link, e.g., via a downlink radio frame from the BS to the UE or via an uplink radio frame from the UE to the BS. In various embodiments, a BS in the present disclosure can be referred to as a network side and can include, or be implemented as, a next Generation Node B (gNB) , an E-UTRAN Node B (eNB) , a Transmission/Reception Point (TRP) , an Access Point (AP) , etc.; while a UE in the present disclosure can be referred to as a terminal and can include, or be implemented as, a mobile station (MS) , a station (STA) , etc. A BS and a UE may be described herein as non-limiting examples of “wireless communication nodes, ” and “wireless communication devices” respectively, which can practice the methods disclosed herein and may be capable of wireless and/or wired communications, in accordance with various embodiments of the present disclosure.

FIG. 1 illustrates an exemplary communication network 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. As shown in FIG. 1, the exemplary communication network 100 includes a base station (BS) 101 and a plurality of UEs, UE 1 110, UE 2 120 …UE 3 130, where the BS 101 can communicate with the UEs according to wireless protocols. Each UE may transmit uplink data to the BS 101 with a transmission power set between 0 and a maximum transmission power. For an uplink transmission, the UE may determine a power headroom report (PHR) representing remaining power margin at the UE, and report the PH to the BS.

FIG. 2 illustrates a block diagram of a base station (BS) 200, in accordance with some embodiments of the present disclosure. The BS 200 is an example of a device that can be configured to implement the various methods described herein. As shown in FIG. 2, the BS 200 includes a housing 240 containing a system clock 202, a processor 204, a memory 206, a transceiver 210 comprising a transmitter 212 and receiver 214, a power module 208, an uplink transmission scheduler 220, a PHR analyzer 222, a PHR carrier analyzer 224, and a power control parameter configurator 226.

In this embodiment, the system clock 202 provides the timing signals to the processor 204 for controlling the timing of all operations of the BS 200. The processor 204 controls the general operation of the BS 200 and can include one or more processing circuits or modules such as a central processing unit (CPU) and/or any combination of general-purpose microprocessors, microcontrollers, digital signal processors (DSPs) , field programmable gate array (FPGAs) , programmable logic devices (PLDs) , controllers, state machines, gated logic, discrete hardware components, dedicated hardware finite state machines, or any other suitable circuits, devices and/or structures that can perform calculations or other manipulations of data.

The memory 206, which can include both read-only memory (ROM) and random access memory (RAM) , can provide instructions and data to the processor 204. A portion of the memory 206 can also include non-volatile random access memory (NVRAM) . The processor 204 typically performs logical and arithmetic operations based on program instructions stored within the memory 206. The instructions (a.k.a., software) stored in the memory 206 can be executed by the processor 204 to perform the methods described herein. The processor 204 and memory 206 together form a processing system that stores and executes software. As used herein, “software” means any type of instructions, whether referred to as software, firmware, middleware, microcode, etc., which can configure a machine or device to perform one or more desired functions or processes. Instructions can include code (e.g., in source code format, binary code format, executable code format, or any other suitable format of code) . The instructions, when executed by the one or more processors, cause the processing system to perform the various functions described herein.

The transceiver 210, which includes the transmitter 212 and receiver 214, allows the BS 200 to transmit and receive data to and from a remote device (e.g., a UE or another BS) . An antenna 250 is typically attached to the housing 240 and electrically coupled to the transceiver 210. In various embodiments, the BS 200 includes (not shown) multiple transmitters, multiple receivers, and multiple transceivers. In one embodiment, the antenna 250 is replaced with a multi-antenna array 250 that can form a plurality of beams each of which points in a distinct direction. The transmitter 212 can be configured to wirelessly transmit packets having different packet types or functions, such packets being generated by the processor 204. Similarly, the receiver 214 is configured to receive packets having different packet types or functions, and the processor 204 is configured to process packets of a plurality of different packet types. For example, the processor 204 can be configured to determine the type of packet and to process the packet and/or fields of the packet accordingly.

In a wireless communication, the BS 200 may receive an uplink transmission from a UE, wherein the uplink transmission is performed based on a transmission power related to power control parameters. For example, the uplink transmission scheduler 220 in this example may schedule a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by a UE. Each of the plurality of uplink transmissions is an earliest uplink transmission scheduled in the corresponding cell after a triggering condition associated with the PHR is met. According to various embodiments, the plurality of uplink transmissions comprises transmissions on at least one uplink transmission (e.g. PUSCH) scheduled by downlink control information (DCI) and at least one configured grant uplink transmission, for example a configured grant PUSCH.

The PHR carrier analyzer 224 in this example may receive, from the UE, an uplink transmission determined from the plurality of uplink transmissions for carrying a power headroom report (PHR) MAC CE comprising a report of at least one power headroom report (PHR) . The at least one PHR may be determined for the plurality of uplink transmissions from the UE to the BS 200. The PHR analyzer 222 in this example may analyze the PHR MAC CE.

In one embodiment, the uplink transmission is determined based on a comparison of time domain positions of the following: an ending symbol or a receiving time of a DCI for scheduling each of the at least one uplink transmission, e.g. at least one PUSCH; and a predetermined number of time units before a starting symbol of each of the at least one configured grant uplink transmission, e.g. at least one configured grant PUSCH. In another embodiment, the uplink transmission is determined based on a comparison of time domain positions of the following: an ending symbol or a receiving time of a DCI for scheduling each of the at least one uplink transmission; and a starting symbol of each of the at least one configured grant uplink transmission.

In a different embodiment, the uplink transmission is received on a configured grant uplink transmission having K repetitions. The PHR is carried based on one of the following manners: the PHR is carried by the uplink transmission only when the uplink transmission corresponds to a first repetition of the configured grant uplink transmission; the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will not be carried by any subsequent repetition of the configured grant uplink transmission; or the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will be carried by each subsequent repetition of the configured grant uplink transmission.

In one embodiment, the uplink transmission is received by the PHR carrier analyzer 224 on an uplink transmission scheduled by a DCI for carrying the PHR. The at least one PHR may be determined by at least one of the following. The UE determines a virtual PHR for each of the plurality of corresponding cells corresponding to a first configured grant uplink transmission, wherein a time position at a predetermined number of time units before a starting symbol of the first configured grant uplink transmission is later than an ending symbol of the DCI. The UE determines an actual PHR for each of the plurality of uplink transmissions corresponding to a second configured grant uplink transmission, wherein a time position at the predetermined number of time units before a starting symbol of the second configured grant uplink transmission is not later than the ending symbol of the DCI.

In another embodiment, the UE determines an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that overlaps at least partially with the uplink transmission carrying the PHR; and the UE determines a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that does not overlap with the uplink transmission carrying the PHR.

In one embodiment, the plurality of uplink transmissions comprises at least one sounding reference signal (SRS) transmission. The uplink transmission is received by the PHR carrier analyzer 224 on an uplink transmission (e.g. a PUSCH) that is associated with a reference time position and for carrying the PHR. In one example, the reference time position is at an ending symbol of a DCI scheduling the uplink transmission. In another example, the reference time position is a first predetermined number of time units before a starting symbol of the uplink transmission when the uplink transmission is a configured grant uplink transmission, e.g. a configured grant PUSCH.

For PHRs determined based on SRS, an actual PHR is determined for: each of the at least one SRS transmission; each periodic SRS transmission of the at least one SRS transmission; among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is not later than the reference time position by more than a second predetermined number of time units; among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is not later than the reference time position; and/or among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is not later than the reference time position. For PHRs determined based on SRS, a virtual PHR is determined for: among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is later than the reference time position by more than a second predetermined number of time units; among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is later than the reference time position; and/or among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is later than the reference time position.

In one embodiment, the uplink transmission is received by the PHR carrier analyzer 224 on an uplink transmission that is associated with a cut-off time position and for carrying the PHR. The cut-off time position is a latest time for the UE to determine a transmission power of the uplink transmission on the uplink transmission. In this case, the at least one PHR may be determined by at least one of the following. A virtual PHR is determined for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is later than the cut-off time position by more than a predetermined number of time units. An actual PHR is determined for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is not later than the cut-off time position by more than the predetermined number of time units. A virtual PHR is determined for each of the plurality of uplink transmissions corresponding to an uplink transmission scheduled by a DCI whose ending symbol is later than the cut-off time position. An actual PHR is determined for each of the plurality of uplink transmissions corresponding to an uplink transmission scheduled by a DCI whose ending symbol is not later than the cut-off time position. For example, an uplink transmission can be PUSCH.

The power control parameter configurator 226 in this example may configure power control parameters to be utilized for calculating a PHR. In one embodiment, for each of the plurality of corresponding cells not corresponding to the uplink transmission carrying the PHR, the power control parameter configurator 226 can determine a configuration of at least one power control parameter associated with an uplink transmission scheduled by a DCI or a configured grant uplink transmission in the corresponding cell. The configuration of the at least one power control parameter is utilized to determine a PHR for the corresponding cell. For example, an uplink transmission can be PUSCH.

In one embodiment, the configuration of the at least one power control parameter is determined based on: a decision by the UE, wherein the configuration is indicated by at least one bit in a PHR MAC CE; a default uplink transmission type according to a semi-static configuration by the BS 200 or according to a system pre-definition; a dynamic indication from the BS 200 for the corresponding cell; whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission corresponds to an actual PHR or a virtual PHR; an ending symbol of a DCI for scheduling the uplink transmission; a predetermined number of time units before a starting symbol of the configured grant uplink transmission; a transmission time for each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission; whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission overlaps with an uplink transmission carrying the PHR; and/or whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.

The power module 208 can include a power source such as one or more batteries, and a power regulator, to provide regulated power to each of the above-described modules in FIG. 2. In some embodiments, if the BS 200 is coupled to a dedicated external power source (e.g., a wall electrical outlet) , the power module 208 can include a transformer and a power regulator.

The various modules discussed above are coupled together by a bus system 230. The bus system 230 can include a data bus and, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It is understood that the modules of the BS 200 can be operatively coupled to one another using any suitable techniques and mediums.

Although a number of separate modules or components are illustrated in FIG. 2, persons of ordinary skill in the art will understand that one or more of the modules can be combined or commonly implemented. For example, the processor 204 can implement not only the functionality described above with respect to the processor 204, but also implement the functionality described above with respect to the uplink transmission scheduler 220. Conversely, each of the modules illustrated in FIG. 2 can be implemented using a plurality of separate components or elements.

FIG. 3 illustrates a flow chart for a method 300 performed by a BS, e.g. the BS 200 in FIG. 2, for uplink data transmission, in accordance with some embodiments of the present disclosure. At operation 302, the BS schedules a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by a UE. At operation 304, the BS receives, from the UE, an uplink transmission determined from the plurality of uplink transmissions for carrying power headroom report (PHR) in a first cell. At operation 306, the BS determines a configuration of at least one power control parameter associated with an uplink transmission scheduled by a DCI or a configured grant uplink transmission, in each cell other than the first cell. The order of the steps shown in FIG. 3 may be changed according to different embodiments of the present disclosure.

FIG. 4 illustrates a block diagram of a UE 400, in accordance with some embodiments of the present disclosure. The UE 400 is an example of a device that can be configured to implement the various methods described herein. As shown in FIG. 4, the UE 400 includes a housing 440 containing a system clock 402, a processor 404, a memory 406, a transceiver 410 comprising a transmitter 412 and a receiver 414, a power module 408, a power headroom determiner 420, a PHR generator 422, a PHR carrier determiner 424, and a power control parameter determiner 426.

In this embodiment, the system clock 402, the processor 404, the memory 406, the transceiver 410 and the power module 408 work similarly to the system clock 202, the processor 204, the memory 206, the transceiver 210 and the power module 208 in the BS 200. An antenna 450 or a multi-antenna array 450 is typically attached to the housing 440 and electrically coupled to the transceiver 410.

The power headroom determiner 420 in this example may determine a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by the UE 400; and determine at least one power headroom report (PHR) for the plurality of uplink transmissions from the UE 400 to a BS. Each of the plurality of uplink transmissions is an earliest uplink transmission scheduled in the corresponding cell after a triggering condition associated with the PHR is met. According to various embodiments, the plurality of uplink transmissions comprises transmissions on at least one uplink transmission, e.g. at least one PUSCH, scheduled by downlink control information (DCI) and at least one configured grant uplink transmission, e.g. at least one configured grant PUSCH.

The PHR generator 422 in this example may generate a power headroom report (PHR) MAC CE for reporting the at least one PHR. The PHR carrier determiner 424 in this example may determine, from the plurality of uplink transmissions, an uplink transmission for carrying the PHR.

In one embodiment, the PHR carrier determiner 424 may determine the uplink transmission by comparing time domain positions of the following: an ending symbol of a DCI for scheduling each of the at least one uplink transmission; and a predetermined number of time units before a starting symbol of each of the at least one configured grant uplink transmission. In another embodiment, the PHR carrier determiner 424 may determine the uplink transmission by comparing time domain positions of the following: an ending symbol of a DCI for scheduling each of the at least one uplink transmission; and a starting symbol of each of the at least one configured grant uplink transmission.

In a different embodiment, the PHR carrier determiner 424 may determine a configured grant uplink transmission having K repetitions. The PHR may be carried based on one of the following manners: the PHR is carried by the uplink transmission only when the uplink transmission corresponds to a first repetition of the configured grant uplink transmission; the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will not be carried by any subsequent repetition of the configured grant uplink transmission; or the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will be carried by each subsequent repetition of the configured grant uplink transmission.

In one embodiment, the PHR carrier determiner 424 determines an uplink transmission scheduled by a DCI for carrying the PHR. The at least one PHR may be determined by at least one of the following. The power headroom determiner 420 determines a virtual PHR for each of the plurality of corresponding cells corresponding to a first configured grant uplink transmission, wherein a time position at a predetermined number of time units before a starting symbol of the first configured grant uplink transmission is later than an ending symbol of the DCI. The power headroom determiner 420 determines an actual PHR for each of the plurality of uplink transmissions corresponding to a second configured grant uplink transmission, wherein a time position at the predetermined number of time units before a starting symbol of the second configured grant uplink transmission is not later than the ending symbol of the DCI.

In another embodiment, the power headroom determiner 420 determines an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that overlaps at least partially with the uplink transmission; and the power headroom determiner 420 determines a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that does not overlap with the uplink transmission.

In one embodiment, the plurality of uplink transmissions comprises at least one sounding reference signal (SRS) transmission. The PHR carrier determiner 424 determines an uplink transmission that is associated with a reference time position and for carrying the PHR. In one example, the reference time position is at an ending symbol of a DCI scheduling the uplink transmission. In another example, the reference time position is a first predetermined number of time units before a starting symbol of the uplink transmission when the uplink transmission is configured grant uplink transmission.

For PHR based on SRS, the power headroom determiner 420 may determine an actual PHR for: each of the at least one SRS transmission; each periodic SRS transmission of the at least one SRS transmission; among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is not later than the reference time position by more than a second predetermined number of time units; among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is not later than the reference time position; and/or among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is not later than the reference time position. For PHR based on SRS, the power headroom determiner 420 may determine a virtual PHR for: among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is later than the reference time position by more than a second predetermined number of time units; among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is later than the reference time position; and/or among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is later than the reference time position.

In one embodiment, the PHR carrier determiner 424 determines an uplink transmission that is associated with a cut-off time position and for carrying the PHR. The cut-off time position is a latest time for the UE to determine a transmission power of the uplink transmission on the uplink transmission. In this case, the at least one PHR may be determined by at least one of the following. The power headroom determiner 420 determines a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is later than the cut-off time position by more than a predetermined number of time units. The power headroom determiner 420 determines an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is not later than the cut-off time position by more than the predetermined number of time units. The power headroom determiner 420 determines a virtual PHR for each of the plurality of uplink transmissions corresponding to an uplink transmission scheduled by a DCI whose ending symbol is later than the cut-off time position. The power headroom determiner 420 determines an actual PHR for each of the plurality of uplink transmissions corresponding to a grant-based uplink transmission scheduled by a DCI whose ending symbol is not later than the cut-off time position.

The power control parameter determiner 426 in this example may determine power control parameters to be utilized for calculating a PHR by the power headroom determiner 420. In one embodiment, for each of the plurality of corresponding cells not corresponding to the uplink transmission carrying the PHR, the power control parameter determiner 426 can determine a configuration of at least one power control parameter associated with an uplink transmission scheduled by a DCI or a configured grant uplink transmission in the corresponding cell. The configuration of the at least one power control parameter is utilized by the power headroom determiner 420 to determine a PH for the corresponding cell.

In one embodiment, the configuration of the at least one power control parameter is determined by the power control parameter determiner 426 based on: a decision by the UE 400, wherein the configuration is indicated by at least one bit in a control element comprising the PHR; a default uplink transmission type according to a semi-static configuration by the BS or according to a system pre-definition; a dynamic indication from the BS for the corresponding cell; whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission corresponds to an actual PHR or a virtual PHR; an ending symbol of a DCI for scheduling the uplink transmission; a predetermined number of time units before a starting symbol of the configured grant uplink transmission; a transmission time for each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission; whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission overlaps with an uplink transmission carrying the PHR; and/or whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.

The various modules discussed above are coupled together by a bus system 430. The bus system 430 can include a data bus and, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It is understood that the modules of the UE 400 can be operatively coupled to one another using any suitable techniques and mediums.

Although a number of separate modules or components are illustrated in FIG. 4, persons of ordinary skill in the art will understand that one or more of the modules can be combined or commonly implemented. For example, the processor 404 can implement not only the functionality described above with respect to the processor 404, but also implement the functionality described above with respect to the power headroom determiner 420. Conversely, each of the modules illustrated in FIG. 4 can be implemented using a plurality of separate components or elements.

FIG. 5 illustrates a flow chart for a method 500 performed by a UE, e.g. the UE 400 in FIG. 4, for reporting a PHR, in accordance with some embodiments of the present disclosure. At operation 502, the UE determines a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by the UE. The UE determines at operation 504 at least one power headroom report (PHR) for the plurality of uplink transmissions from the UE to a BS. At operation 506, the UE generates a power headroom report (PHR) MAC CE for reporting the at least one PHR to the BS. At operation 508, the UE determines, from the plurality of uplink transmissions, an uplink transmission for carrying the PHR in a first cell. At operation 510, the UE determines a configuration of at least one power control parameter associated with an uplink transmission scheduled by a DCI or a configured grant uplink transmission in each cell other than the first cell. The order of the steps shown in FIG. 5 may be changed according to different embodiments of the present disclosure.

Different embodiments of the present disclosure will now be described in detail hereinafter. It is noted that the features of the embodiments and examples in the present disclosure may be combined with each other in any manner without conflict.

In a first embodiment, it is determined whether the PHR is carried by a grant-based uplink transmission or a grant-free uplink transmission. A grant-based uplink transmission, e.g. a grant-based PUSCH, is an uplink transmission scheduled by grant; while a grant-free uplink transmission, e.g. a grant-free PUSCH, is a configured grant uplink transmission.

A base station configures a set of PHR trigger parameters for a terminal. The terminal determines when a PHR is triggered based on the set of PHR trigger parameters. The set of PHR triggering parameters comprises at least one of the following: a PHR cycle timer, a PHR prohibit timer, a path loss variation threshold, whether a feedback of Type 2 PHR is needed for another cell group (CG) , whether a feedback of multiple PHRs is needed, etc.

As shown in FIG. 6, the terminal determines that a PHR is triggered at time t0 600, and the terminal supports multiple cells for uplink transmission. After time t0 600, there is a grant-free PUSCH1 612 to be transmitted on the Cell1 without DCI scheduling, there is a retransmission re-PUSCH2 622 scheduled by DCI 2 620 and to be transmitted on the Cell2, there is a PUSCH3 632 scheduled by DCI 3 630 and to be transmitted on the Cell3, and there is a PUSCH4 642 scheduled by DCI 4 640 and to be transmitted on the Cell4. The terminal needs to decide to feed back the PHR on which Cell’s PUSCH, according to at least one of the following rule based on a semi-static configuration by the base station or a system pre-definition.

According to a first rule, after the PHR is triggered, it is determined which Cell’s DCI ending symbol or "virtual DCI ending symbol" has the earliest time domain position. Then the PHR is carried by a PUSCH corresponding to the so determined Cell’s DCI ending symbol or "virtual DCI ending symbol" . For a certain cell, the DCI is a DCI first received by the terminal for scheduling a non-retransmission PUSCH on the Cell, after the PHR is triggered. For a certain cell, said "virtual DCI ending symbol" is a time position determined by pushing back T time units 605 from the starting symbol of the first transmitted grant-free PUSCH after the PHR is triggered, according to a semi-static configuration by the base station or a system pre-definition. As shown in FIG. 6, the time t1 601 is the "virtual DCI ending symbol" . The time unit may be a symbol, a mini-slot, a slot, a subframe, etc. The value of the T may be N2, or minimum of K2.

According to this rule, in FIG. 6, because the time t1 601 is before the DCI 4 640 ending symbol and the DCI 3 630 ending symbol, the terminal will feed back PHR on the grant-free PUSCH1 on Cell1.

According to this rule, the time domain position of the DCI ending symbol of a certain cell may be the same as the time domain position of the "virtual DCI ending symbol" of another cell. Then based on a semi-static configuration by the base station or a system pre-definition, it is determined which Cell’s PUSCH should be used to carry the PHR in this case. For example, the PHR may be fed back on the PUSCH scheduled by the DCI in this case according to a semi-static configuration by the base station or a system pre-definition.

According to a second rule, after the PHR is triggered, it is determined which Cell’s DCI ending symbol or grant-free PUSCH starting symbol has the earliest time domain position. Then the PHR is carried by the so determined Cell’s PUSCH corresponding to the DCI or the so determined Cell’s grant-free PUSCH. For a certain cell, the DCI is a DCI first received by the terminal for scheduling a non-retransmission PUSCH on the Cell, after the PHR is triggered. For a certain cell, said grant-free PUSCH starting symbol is a starting symbol of a grant-free PUSCH to be transmitted first after the PHR is triggered, according to a semi-static configuration by the base station or a system pre-definition. In FIG. 7, the grant-free PUSCH starting symbol on Cell2 is the time t1 701. According to this rule, in FIG. 7, because the time t1 701 is after the DCI 4 740 ending symbol, the terminal will feed back PHR on the PUSCH4 742 on Cell4.

According to this rule, the time domain position of the DCI ending symbol of a certain cell may be the same as the time domain position of the grant-free PUSCH starting symbol of another cell. Then based on a semi-static configuration by the base station or a system pre-definition, it is determined which Cell’s PUSCH should be used to carry the PHR in this case. For example, the PHR may be fed back on the PUSCH scheduled by the DCI in this case according to a semi-static configuration by the base station or a system pre-definition.

The terminal determines, according to at least one of the above rules, to feed back the PHR on which PUSCH of which Cell.

In addition, the base station semi-statically may configure a grant-free PUSCH to perform repeated transmissions, e.g. with a repetition factor of k, where k is any positive integer. That is, the grant-free PUSCH needs to be sent repeatedly for k times. If the terminal is to feed back the PHR on the grant-free PUSCH, then it can adopt one of the following modes based on a semi-static configuration by the base station or a system pre-definition. This embodiment can also be extended to grant-based PUSCH.

In a first mode, the terminal can only feed back PHR on a first transmission of a grant-free PUSCH, not on the k-1 subsequent iterations. Therefore, if the first transmission of the grant-free PUSCH is before the PHR trigger time, the terminal can no longer feed back the PHR on the subsequent k-1 repetitions of the grant-free PUSCH.

In a second mode, the terminal can send the feedback of PHR at any one of the k times of repeated transmissions of a grant-free PUSCH, but the PHR feedback will not be repeated and will be sent only once. For example, the terminal triggers PHR feedback at time t0, and then the terminal is about to send the n-th repetition of a grant-free PUSCH, where n is a positive integer not greater than k. The terminal feeds back PHR on the n-th repetition of the grant-free PUSCH. But the PHR feedback is no longer repeated on any of the subsequent (n+1) -th to k-th repetitions of the grant-free PUSCH.

In a third mode, the terminal may send the feedback of PHR at any one of the k times of repeated transmissions of a grant-free PUSCH, and the PHR feedback may also be repeated on the repeatedly transmitted grant-free PUSCH. For example, the terminal triggers PHR feedback at time t0, and then the terminal is about to send the n-th repetition of a grant-free PUSCH, where n is a positive integer not greater than k. The terminal feeds back PHR on the n-th repetition of the grant-free PUSCH. The PHR feedback is also repeated on each of the subsequent (n+1) -th to k-th repetitions of the grant-free PUSCH.

In a second embodiment, it is disclosed when PHRs are carried on a grant-based PUSCH, how to determine actual or virtual for other Cell’s grant-free PUSCH. The terminal supports multiple cells for uplink transmissions. After the PHR is triggered, the terminal determines that the PHRs are to be fed back on a PUSCH scheduled by a DCI of Cell1. Based on a semi-static configuration by the base station or a system pre-definition, the terminal has grant-free PUSCH to be transmitted on both Cell2 and Cell3. The terminal determines, when calculating PHR on Cell2 and Cell3, whether to calculate an actual PHR or a virtual PHR. This may be determined according to one of the following rules based on a semi-static configuration by the base station or a system pre-definition.

According to a first rule, for Cell2 and Cell3, after the PHR is triggered (at time t0 800) , the terminal needs to send grant-free PUSCH2 822 and grant-free PUSCH3 832 according to a semi-static configuration of the base station, as shown in FIG. 8. For Cell2 and Cell3, the terminal may determine a "virtual DCI ending symbol" based on the grant-free PUSCH starting symbol. The "virtual DCI ending symbol" of a grant-free PUSCH may correspond to a symbol t1 determined by extending back T time units 805 from the grant-free PUSCH starting symbol. In FIG. 8, the "virtual DCI ending symbol" of the grant-free PUSCH2 822 on Cell2 is the time t1 801; the "virtual DCI ending symbol" of the grant-free PUSCH3 832 on Cell3 is the time t2 802. The terminal may utilize the ending symbol of the DCI scheduling the PHR-carrying PUSCH as a threshold. That is, the DCI1 810 ending symbol in FIG. 8 is used as a threshold. If a "virtual DCI ending symbol" of a certain cell is not later than the threshold, the terminal calculates an actual PHR for the Cell; a "virtual DCI ending symbol" of a certain cell is later than the threshold, the terminal calculates a virtual PHR for the Cell. According to the first rule, the terminal calculates a virtual PHR for Cell2, and calculates an actual PHR for Cell3.

According to a second rule, for Cell2 and Cell3, after the PHR is triggered (at time t0 800) , the terminal needs to send grant-free PUSCH2 and grant-free PUSCH3 according to a semi-static configuration of the base station. Based on whether each of the grant-free PUSCH2 and grant-free PUSCH3 is overlapping with the PHR-carrying PUSCH1, the terminal determines whether to calculate an actual PHR or a virtual PHR for each of Cell2 and Cell3. If a grant-free PUSCH on a certain cell partially or completely overlaps with the PUSCH carrying the PHR, an actual PHR is calculated for the cell; if a grant-free PUSCH on a certain cell does not overlap with the PUSCH carrying the PHR, a virtual PHR is calculated for the cell. As shown in FIG. 8 for example, the grant-free PUSCH2 822 on Cell2 and the grant-free PUSCH3 832 on Cell3 both overlap with the PHR-carrying PUSCH1 812. As such, according to the second rule, the terminal calculates actual PHRs on both Cell2 and Cell3.

In a third embodiment, it is disclosed how to determine actual or virtual for a Type 3 PHR. If the terminal wants to feed back a Type 3 PHR for a certain cell, then the terminal needs to decide whether to calculate an actual PHR or a virtual PHR for the Type 3 PHR of the cell. A Type 3 PHR is a PHR carried by a sounding reference signal (SRS) , which may be one of: a periodic SRS, a semi-persistent SRS, or an aperiodic SRS. According to at least one of the following methods based on a semi-static configuration by the base station or a system pre-definition, the terminal determines, for a certain type of SRS on a cell, to feed back an actual PHR or a virtual PHR.

In a method 3-1, for a Type 3 PHR, only an actual PHR is fed back. If an actual PHR cannot be calculated, the Type 3 PHR is not fed back.

In a method 3-2, for a periodic SRS, the terminal always feeds back an actual PHR.

In a method 3-3, for a periodic SRS, the terminal first determines the "virtual DCI ending symbol" , which is determined by extending back T time units from the SRS starting transmission symbol. The time unit may be a symbol, a mini-slot or a slot. According to the order relationship between the "virtual DCI ending symbol" and the "first DCI ending symbol" , the terminal determines whether to calculate an actual PHR or a virtual PHR for the periodic SRS. If the "virtual DCI ending symbol" is not later than the "first DCI ending symbol" , the terminal calculates the actual PHR for the periodic SRS; otherwise, the terminal calculates the virtual PHR. The "first DCI ending symbol" is an ending symbol of a DCI scheduling the PHR-carrying PUSCH, or a "virtual DCI ending symbol" corresponding to a grant-free PUSCH carrying the PHR.

In a method 3-4, for a semi-persistent SRS, the SRS is activated by a MAC CE. The terminal may treat the ending symbol of the received MAC CE as a “virtual DCI ending symbol” . According to the order relationship between the “virtual DCI ending symbol” and the “first DCI ending symbol” , the terminal can determine whether to calculate an actual PHR or a virtual PHR for the semi-persistent SRS. If the "virtual DCI ending symbol" is not later than the "first DCI ending symbol" , the terminal calculates the actual PHR for the semi-persistent SRS; otherwise, the terminal calculates the virtual PHR. The "first DCI ending symbol" is an ending symbol of a DCI scheduling the PHR-carrying PUSCH, or a "virtual DCI ending symbol" corresponding to a grant-free PUSCH carrying the PHR.

In a method 3-5, for an aperiodic SRS, the SRS is triggered by a DCI. The terminal may treat the ending symbol of the received DCI as a “virtual DCI ending symbol” . According to the order relationship between the "virtual DCI ending symbol" and the "first DCI ending symbol" , the terminal determines whether to calculate an actual PHR or a virtual PHR for the aperiodic SRS. If the "virtual DCI ending symbol" is not later than the "first DCI ending symbol" , the terminal calculates the actual PHR for the aperiodic SRS; otherwise, the terminal calculates the virtual PHR. The "first DCI ending symbol" is an ending symbol of a DCI scheduling the PHR-carrying PUSCH, or a "virtual DCI ending symbol" corresponding to a grant-free PUSCH carrying the PHR.

In a fourth embodiment, it is disclosed how to determine whether a PHR is calculated based on a grant-free PUSCH or a grant-based PUSCH. A terminal supports multiple cells for uplink transmissions. After the PHR is triggered, the terminal determines to feed back PHR on PUSCH1 of Cell1. For Cell2, the terminal may send either a PUSCH scheduled by a DCI or a grant-free PUSCH semi-statically configured by the base station. For these two types of PUSCH, the terminal may use different open loop power control parameters and/or different closed-loop power control parameters to calculate the PHR. Therefore, for the PHR fed back by the terminal to the base station on the Cell2, some method is desired to let the base station know whether the PHR is calculated based on the PUSCH scheduled by the DCI or based on the grant-free PUSCH. According to at least one of the following methods based on a semi-static configuration by the base station or a system pre-definition, both the base station and the terminal can be aware of the open loop power control parameter and the closed loop power control parameter used for calculating the feedback PHR on Cell2.

In a method 4-1, an indication in the PHR MAC CE can indicate whether a PHR is calculated based on the grant-based PUSCH power control parameter or the grant-free PUSCH power control parameter. For example, one reserved bit in the PHR MAC CE may be used for the indication. When the bit is set to 1, it indicates that the PHR is calculated based on the grant-based PUSCH power control parameter; when the bit is set to 0, it indicates that the PHR is calculated based on the grant-free PUSCH power control parameter. Alternatively, one or more bits in the PHR MAC CE may be used to indicate that the PHR is calculated based on which candidate value set and/or which value mapping table of the open loop and/or closed-loop power control parameter.

The open loop power control parameter candidate set is pre-defined by the system or semi-statically configured by the base station, including at least one of the following: one or more candidate value sets for P _O; one or more candidate value sets for α; one or more candidate value sets for {P _O, α} ; one or more measurement reference signals for measuring PL. The closed loop power control parameter candidate set is pre-defined by the system or semi-statically configured by the base station, including one or more TPC value mapping tables.

In a method 4-2, the base station determines whether the PHR is calculated based on the grant-based PUSCH power control parameter or the grant-free PUSCH power control parameter according to the indication in the PHR MAC CE that the PHR is of an actual or virtual type, assuming there is a pre-determined relationship between the PUSCH type and the PHR type.

In a method 4-3, a default PUSCH type is determined based on a semi-static configuration by the base station or a system pre-definition. The terminal calculates the feedback PHR based on the open-loop and/or closed-loop power control parameters corresponding to the default PUSCH type.

In a method 4-4, the base station dynamically indicates to the terminal: for a PHR triggered for a certain time or in a certain period of time on a cell, the terminal calculates and feeds back the PHR according to the open-loop and/or closed-loop power control parameters of the grant-based PUSCH power control parameter or the grant-free PUSCH. For example, a PHR type indication field may be added in the DCI for the above indication; or a PHR type indication field may be added in the MAC CE for the above indication; or the DCI format type may be used for an implicit indication of the PUSCH type.

In a method 4-5, the PUSCH type is determined based on an actual PHR priority principle. After the terminal triggers a PHR on a cell, if one of the grant-based PUSCH and the grant-free PUSCH corresponds to an actual PHR, and the other PUSCH corresponds to a virtual PHR, then the terminal calculates the PHR based on the PUSCH corresponding to the actual PHR, which may be one kind of the grant-based PUSCH and the grant-free PUSCH. Specifically, the terminal calculates the PHR based on the open-loop and/or closed loop power control parameter corresponding to the PUSCH where an actual PHR can be calculated, and feeds back the actual PHR on the cell. After receiving the actual PHR on the PUSCH, the base station determines that this is an actual PHR. As such, the base station can determine whether the PHR was calculated based on the open-loop and/or closed loop power control parameter corresponding to which type of PUSCH (e.g. one of the grant-based PUSCH and the grant-free PUSCH) . If both PUSCH types correspond to a same PHR type, e.g. the actual PHR or the virtual PHR, other methods disclosed herein can be used, e.g. using a default PUSCH type based on a semi-static configuration by the base station or a system pre-definition.

In a method 4-6, the PUSCH type is determined based on a scheduling time priority principle. After the terminal triggers a PHR on a cell, the DCI ending symbol of the grant-based PUSCH and the "virtual DCI ending symbol" of the grant-free PUSCH are compared to determine a PUSCH with an earlier scheduling time. The terminal will feed back the PHR calculated based on the open-loop and/or closed loop power control parameter corresponding to the PUSCH with an earlier scheduling time. The "virtual DCI ending symbol" is a time position determined by pushing back T time units from the starting symbol of the first transmitted grant-free PUSCH after the PHR is triggered, according to a semi-static configuration by the base station or a system pre-definition. As shown in FIG. 6, the time t1 601 is the "virtual DCI ending symbol" . The time unit may be a symbol, a mini-slot, a slot, a subframe, etc. The value of the T may be N2, or minimum of K2.

In a method 4-7, the PUSCH type is determined based on a transmission time priority principle. After the terminal triggers a PHR on a cell, the transmission times of the grant-free PUSCH and the grant-based PUSCH are compared to determine a PUSCH with an earlier transmission time. The terminal will feed back the PHR calculated based on the open-loop and/or closed loop power control parameter corresponding to the PUSCH with an earlier transmission time, for the cell.

In a method 4-8, the PUSCH type is determined based on an overlapping time priority principle. If only one of the grant-free PUSCH and the grant-based PUSCH overlaps partially or completely with the PUSCH carrying the PHR in the time domain, the terminal will feed back the PHR calculated based on the open-loop and/or closed loop power control parameter corresponding to the overlapping PUSCH for the cell. If both of the grant-free PUSCH and the grant-based PUSCH overlap partially or completely with the PUSCH carrying the PHR in the time domain, the terminal will feed back the PHR calculated based on the open-loop and/or closed loop power control parameter corresponding to the overlapping PUSCH with an earlier transmission time, for the cell.

In a fifth embodiment, the PHR is fed back based on a look-ahead mechanism. If the uplink power control of the terminal supports the look-ahead mechanism, the terminal will not decide the transmission power for the uplink transmission immediately after receiving the DCI for scheduling the uplink transmission, but will wait until a certain cut-off time to make the decision about the transmission power of the uplink transmission. In this embodiment, the terminal calculates the PHR at a time based on the look-ahead mechanism. As such, the terminal can decide whether to feed back an actual PHR or a virtual PHR for each cell at the cut-off time.

As shown in FIG. 9, the terminal has a PHR feedback triggered at t0 time 900. The terminal determines to send PHR feedbacks of Cell1, Cell2, Cell3 on PUSCH1 912 scheduled by DCI1 910 on Cell1. It is assumed that the t1 time 901 is the cut-off time for determining the uplink transmission power.

For Cell2, the terminal determines a "virtual DCI ending symbol" for the grant-free PUSCH2 922. The "virtual DCI ending symbol" is a time position determined by pushing back T time units 905 from the starting symbol of the grant-free PUSCH2 922. As shown in FIG. 9, the time t2 902 is the "virtual DCI ending symbol" . The time unit may be a symbol, a mini-slot, a slot, a subframe, etc. The value of the T may be N2, or minimum of K2. Here, N2 is

and K2 is the minimum value of multiple candidate scheduling delays between a scheduling DCI and a PUSCH scheduled by the DCI, or between a scheduling DCI and a PDSCH scheduled by the DCI based on a semi-static configuration by the base station or a system pre-definition. Thus on Cell2, the "virtual DCI ending symbol" , i.e. time t2 902, is before the time t1 901. Therefore, the terminal calculates and feeds back the actual PHR on Cell2.

For Cell3, the ending symbol of DCI3 930 for scheduling PUSCH3 932 is before the cut-off time t1 901. As such, for Cell3, the terminal calculates and feeds back the actual PHR.

For Cell4, the ending symbol of DCI4 940 for scheduling PUSCH4 942 is after the cut-off time t1 901. As such, for Cell4, the terminal calculates and feeds back the virtual PHR.

As shown in FIG. 10, the cut-off time is a time position determined by pushing backwards n time units from the starting symbol of the PUSCH carrying the PHR, resulting in the time point t1 1001. Alternatively, the cut-off time t1 1001 is determined by pushing forwards m time units from the ending symbol of the DCI 1010 scheduling the PUSCH 1012 carrying the PHR. The time unit may be a symbol, a mini-slot, a slot, etc. The value of n can be determined based on any of the following methods.

In method 5-1, the value of n may be equal to a time delay for the terminal to process the HARQ-ACK feedback corresponding to the PDSCH, with a specific value of:

where

The variables involved in this formula have the following values. The value of N1 is related to terminal capability, PDSCH Numerology, uplink transmission Numerology, and DMRS time-frequency resource location. The value of d _1, 1 is related to PDSCH mapping type, terminal capability, and PDSCH time domain length. The value of μ is related to the PDCCH Numerology, PDSCH Numerology, and uplink transmission Numerology. The time units T _c=1 (Δf _max·N _f) , where Δf _max=480·10 ³ Hz and N _f=4096. The constant κ=T _s/T _c=64, where T _s=1/ (Δf _ref·N _f, ref) , Δf _ref=15·10 ³ Hz and N _f, ref=2048.

In method 5-2, the value of n may be related to a time delay for the terminal to process the HARQ-ACK feedback corresponding to the PDSCH, with a specific value of:

where

as discussed above, and k is a constant of values like 0.5, 1, etc.

In method 5-3, the value of n may be related to a time delay for the terminal to process the HARQ-ACK feedback corresponding to the PDSCH, with a specific value of:

where

as discussed above, and k is an integer of values like 1, 2, 3, etc.

In method 5-4, the value of n may be equal to a time delay for the terminal to process the HARQ-ACK feedback corresponding to the semi-persistent PDSCH release command, with a specific value of:

where

The variables involved in this formula have the following values. The value of N is related to terminal capabilities and the PDCCH Numerology, while other parameters have been discussed above. For the UE processing capability 1 and for the SCS of the PDCCH reception, N=10 for 15 kHz, N=12 for 30 kHz, N=22 for 60 kHz, and N=25 for 120 kHz. For a UE with capability 2 and for the SCS of the PDCCH reception, N=5 for 15 kHz, N=5.5 for 30 kHz, and N=11 for 60 kHz.

In method 5-5, the value of n may be related to a time delay for the terminal to process the HARQ-ACK feedback corresponding to the semi-persistent PDSCH release command, with a specific value of:

where

as discussed above, and k is a constant of values like 0.5, 1, etc.

In method 5-6, the value of n may be related to a time delay for the terminal to process the HARQ-ACK feedback corresponding to the semi-persistent PDSCH release command, with a specific value of:

where

as discussed above, and k is an integer of values like 1, 2, 3, etc.

In method 5-7, the value of n may be equal to a time delay for the terminal to process the PUSCH scheduled by the PDCCH, with a specific value of:

where

The variables involved in this formula have the following values. The value of N ₂ is related to terminal capability, PDCCH Numerology, and uplink transmission Numerology; d _2, 1 = 0 or d _2, 1 = 1; d _2, 2=0 or d _2, 2 is equal to the BWP conversion delay; while other parameters have been discussed above.

In method 5-8, the value of n may be related to a time delay for the terminal to process the PUSCH scheduled by the PDCCH, with a specific value of:

where

as discussed above, and k is a constant of values like 0.5, 1, etc.

In method 5-9, the value of n may be related to a time delay for the terminal to process the PUSCH scheduled by the PDCCH, with a specific value of:

where

as discussed above, and k is an integer of values like 1, 2, 3, etc.

In method 5-10, the value of n may be equal to a time delay for the terminal to process the PUCCH or PUSCH including an aperiodic CSI feedback, with a specific value of:

where

The variables involved in this formula have the following values. The value of Z is related to the terminal capability, the number of updated CSI reports, etc.; d = 2 or 3 or 4; while other parameters have been discussed above.

In method 5-11, the value of n may be related to a time delay for the terminal to process the PUCCH or PUSCH including an aperiodic CSI feedback, with a specific value of:

where

as discussed above, and k is a constant of values like 0.5, 1, etc.

In method 5-12, the value of n may be related to a time delay for the terminal to process the PUCCH or PUSCH including an aperiodic CSI feedback, with a specific value of:

where

as discussed above, and k is an integer of values like 1, 2, 3, etc.

In the present application, the technical features in the various embodiments can be used in combination in one embodiment without conflict. Each embodiment is merely an exemplary embodiment of the present application.

In all of the above embodiments, the different “application types” mentioned may be at least one of the following: different service modes such as URLLC and eMBB, which are determined based on a semi-static configuration by the base station or a system pre-definition; different services according to dynamic indication of DCI, such as different DCI format indication, or different DCI size indication, or different RNTI indication scrambling DCI, or different DCI blind detection method indication, or a field indicated in the DCI; different candidate value sets corresponding to the open loop power control parameters; different reference signals for path loss measurement; different value mapping tables corresponding to the closed loop power control parameters.

While various embodiments of the present disclosure have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand exemplary features and functions of the present disclosure. Such persons would understand, however, that the present disclosure is not restricted to the illustrated example architectures or configurations, but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

It is also understood that any reference to an element herein using a designation such as "first, " "second, " and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.

Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.

A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as "software" or a "software module) , or any combination of these techniques.

To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure. In accordance with various embodiments, a processor, device, component, circuit, structure, machine, module, etc. can be configured to perform one or more of the functions described herein. The term “configured to” or “configured for” as used herein with respect to a specified operation or function refers to a processor, device, component, circuit, structure, machine, module, etc. that is physically constructed, programmed and/or arranged to perform the specified operation or function.

Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and/or transceivers to communicate with various components within the network or within the device. A general purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.

If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.

In this document, the term "module" as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according embodiments of the present disclosure.

Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present disclosure. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present disclosure with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present disclosure. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.

Various modifications to the implementations described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other implementations without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the implementations shown herein, but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.

Claims

A method performed by a wireless communication device, the method comprising:

determining a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by the wireless communication device;

determining at least one power headroom report (PHR) for the plurality of uplink transmissions from the wireless communication device to a wireless communication node;

generating a power headroom report (PHR) medium access control (MAC) control element (CE) for reporting the at least one PHR; and

determining, from the plurality of uplink transmissions, an uplink transmission for carrying the PHR.
The method of claim 1, wherein:

each of the plurality of uplink transmissions is an earliest uplink transmission scheduled in the corresponding cell after a triggering condition associated with the PHR is met; and

the plurality of uplink transmissions comprises at least one uplink transmission scheduled by downlink control information (DCI) and at least one configured grant uplink transmission.
The method of claim 1, wherein determining the uplink transmission comprises comparing time domain positions of the following:

an ending symbol of a DCI for scheduling each of at least one uplink transmission among the plurality of uplink transmissions; and

a predetermined number of time units before a starting symbol of each of at least one configured grant uplink transmission among the plurality of uplink transmissions.
The method of claim 1, wherein determining the uplink transmission comprises comparing time domain positions of the following:

an ending symbol of a DCI for scheduling each of at least one uplink transmission among the plurality of uplink transmissions; and

a starting symbol of each of at least one configured grant uplink transmission among the plurality of uplink transmissions.
The method of claim 1, wherein:

determining the uplink transmission comprises determining a configured grant uplink transmission having K repetitions; and

the PHR is carried based on one of the following manners:

the PHR is carried by the uplink transmission only when the uplink transmission corresponds to a first repetition of the configured grant uplink transmission,

the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will not be carried by any subsequent repetition of the configured grant uplink transmission, or

the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will be carried by each subsequent repetition of the configured grant uplink transmission.
The method of claim 1, wherein:

determining the uplink transmission comprises determining an uplink transmission scheduled by a DCI for carrying the PHR; and

determining the at least one PHR comprises:

determining a virtual PHR for each of the plurality of corresponding cells corresponding to a first configured grant uplink transmission, wherein a time position at a predetermined number of time units before a starting symbol of the first configured grant uplink transmission is later than an ending symbol of the DCI, and

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a second configured grant uplink transmission, wherein a time position at the predetermined number of time units before a starting symbol of the second configured grant uplink transmission is not later than the ending symbol of the DCI.
The method of claim 1, wherein:

determining the uplink transmission comprises determining an uplink transmission scheduled by a DCI for carrying the PHR; and

determining the at least one PHR comprises:

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that overlaps at least partially with the uplink transmission, and

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that does not overlap with the uplink transmission.
The method of claim 1, wherein:

the plurality of uplink transmissions comprises at least one sounding reference signal (SRS) transmission;

determining the uplink transmission comprises determining an uplink transmission that is associated with a reference time position and for carrying the PHR;

the reference time position is either at an ending symbol of a DCI scheduling the uplink transmission, or a first predetermined number of time units before a starting symbol of the uplink transmission when the uplink transmission is a configured grant uplink transmission.
The method of claim 8, wherein determining the at least one PHR comprises determining an actual PHR for:

each of the at least one SRS transmission;

each periodic SRS transmission of the at least one SRS transmission;

among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is not later than the reference time position by more than a second predetermined number of time units;

among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is not later than the reference time position; and/or

among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is not later than the reference time position.
The method of claim 8, wherein determining the at least one PHR comprises determining a virtual PHR for:

among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is later than the reference time position by more than a second predetermined number of time units;

among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is later than the reference time position; and/or

among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is later than the reference time position.
The method of claim 1, further comprising:

for each of the plurality of corresponding cells not corresponding to the uplink transmission carrying the PHR, determining a configuration of at least one power control parameter associated with an uplink transmission scheduled by a DCI or a configured grant uplink transmission in the corresponding cell,

wherein the configuration of the at least one power control parameter is utilized to determine a PHR for the corresponding cell.
The method of claim 11, wherein the configuration of the at least one power control parameter is determined based on:

a decision by the wireless communication device, wherein the configuration is indicated by at least one bit in a control element comprising the PHR;

a default uplink transmission type according to a semi-static configuration by the wireless communication node or according to a system pre-definition;

a dynamic indication from the wireless communication node for the corresponding cell;

whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission corresponds to an actual PHR or a virtual PHR;

an ending symbol of a DCI for scheduling the uplink transmission;

a predetermined number of time units before a starting symbol of the configured grant uplink transmission;

a transmission time for each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission;

whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission overlaps with an uplink transmission carrying the PHR; and/or

whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.
The method of claim 1, wherein:

determining the uplink transmission comprises determining an uplink transmission that is associated with a cut-off time position and for carrying the PHR;

the cut-off time position is a latest time for the wireless communication device to determine a transmission power of the uplink transmission carrying the PHR; and

determining the at least one PHR comprises:

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is later than the cut-off time position by more than a predetermined number of time units,

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is not later than the cut-off time position by more than the predetermined number of time units,

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to an uplink transmission scheduled by a DCI whose ending symbol is later than the cut-off time position, and/or

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a grant-based uplink transmission scheduled by a DCI whose ending symbol is not later than the cut-off time position.
A method performed by a wireless communication node, the method comprising:

scheduling a plurality of uplink transmissions respectively in a plurality of corresponding cells supported by a wireless communication device; and

receiving, from the wireless communication device, an uplink transmission determined from the plurality of uplink transmissions for carrying a power headroom report (PHR) medium access control (MAC) control element (CE) comprising a report of at least one power headroom report (PHR) ,

wherein the at least one PHR is determined for the plurality of uplink transmissions from the wireless communication device to the wireless communication node.
The method of claim 14, wherein:

each of the plurality of uplink transmissions is an earliest uplink transmission scheduled in the corresponding cell after a triggering condition associated with the PHR is met; and

the plurality of uplink transmissions comprises at least one uplink transmission scheduled by downlink control information (DCI) and at least one configured grant uplink transmission.
The method of claim 14, wherein the uplink transmission is determined based on a comparison of time domain positions of the following:

an ending symbol of a DCI for scheduling each of at least one uplink transmission among the plurality of uplink transmissions; and

a predetermined number of time units before a starting symbol of each of at least one configured grant uplink transmission among the plurality of uplink transmissions.
The method of claim 14, wherein the uplink transmission is determined based on a comparison of time domain positions of the following:

an ending symbol of a DCI for scheduling each of at least one uplink transmission among the plurality of uplink transmissions; and

a starting symbol of each of at least one configured grant uplink transmission among the plurality of uplink transmissions.
The method of claim 14, wherein:

the uplink transmission is received on a configured grant uplink transmission having K repetitions; and

the PHR is carried based on one of the following manners:

the PHR is carried by the uplink transmission only when the uplink transmission corresponds to a first repetition of the configured grant uplink transmission,

the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will not be carried by any subsequent repetition of the configured grant uplink transmission, or

the PHR is carried by the uplink transmission when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, and will be carried by each subsequent repetition of the configured grant uplink transmission.
The method of claim 14, wherein:

the uplink transmission is received on an uplink transmission scheduled by a DCI for carrying the PHR; and

the at least one PHR is determined by:

determining a virtual PHR for each of the plurality of corresponding cells corresponding to a first configured grant uplink transmission, wherein a time position at a predetermined number of time units before a starting symbol of the first configured grant uplink transmission is later than an ending symbol of the DCI, and

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a second configured grant uplink transmission, wherein a time position at the predetermined number of time units before a starting symbol of the second configured grant uplink transmission is not later than the ending symbol of the DCI.
The method of claim 14, wherein:

the uplink transmission is received on an uplink transmission scheduled by a DCI for carrying the PHR; and

the at least one PHR is determined by:

determining an actual PH for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that overlaps at least partially with the uplink transmission carrying the PHR, and

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission that does not overlap with the uplink transmission carrying the PHR.
The method of claim 14, wherein:

the plurality of uplink transmissions comprises at least one sounding reference signal (SRS) transmission;

the uplink transmission is received on an uplink transmission that is associated with a reference time position and for carrying the PHR;

the reference time position is either at an ending symbol of a DCI scheduling the uplink transmission, or a first predetermined number of time units before a starting symbol of the uplink transmission when the uplink transmission is a configured grant uplink transmission.
The method of claim 21, wherein an actual PHR is determined for:

each of the at least one SRS transmission;

each periodic SRS transmission of the at least one SRS transmission;

among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is not later than the reference time position by more than a second predetermined number of time units;

among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is not later than the reference time position; and/or

among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is not later than the reference time position.
The method of claim 21, wherein a virtual PHR is determined for:

among the at least one SRS transmission, each periodic SRS transmission whose starting symbol is later than the reference time position by more than a second predetermined number of time units;

among the at least one SRS transmission, each semi-persistent SRS transmission that is activated by a control element whose ending symbol is later than the reference time position; and/or

among the at least one SRS transmission, each aperiodic SRS transmission that is triggered by a DCI whose ending symbol is later than the reference time position.
The method of claim 14, further comprising:

for each of the plurality of corresponding cells not corresponding to the uplink transmission carrying the PHR, determining a configuration of at least one power control parameter associated with an uplink transmission scheduled by a DCI or a configured grant uplink transmission in the corresponding cell,

wherein the configuration of the at least one power control parameter is utilized to determine a PHR for the corresponding cell.
The method of claim 24, wherein the configuration of the at least one power control parameter is determined based on:

a decision by the wireless communication device, wherein the configuration is indicated by at least one bit in a control element comprising the PHR;

a default uplink transmission type according to a semi-static configuration by the wireless communication node or according to a system pre-definition;

a dynamic indication from the wireless communication node for the corresponding cell;

whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission corresponds to an actual PHR or a virtual PHR;

an ending symbol of a DCI for scheduling the uplink transmission;

a predetermined number of time units before a starting symbol of the configured grant uplink transmission;

a transmission time for each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission;

whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission overlaps with an uplink transmission carrying the PHR; and/or

whether each of the uplink transmission scheduled by a DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.
The method of claim 14, wherein:

the uplink transmission is received on an uplink transmission that is associated with a cut-off time position and for carrying the PHR;

the cut-off time position is a latest time for the wireless communication device to determine a transmission power of the uplink transmission on the uplink transmission; and

the at least one PHR is determined by:

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is later than the cut-off time position by more than a predetermined number of time units,

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission whose starting symbol is not later than the cut-off time position by more than the predetermined number of time units,

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to an uplink transmission scheduled by a DCI whose ending symbol is later than the cut-off time position, and/or

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a grant-based uplink transmission scheduled by a DCI whose ending symbol is not later than the cut-off time position.
A wireless communication device configured to carry out the method of any one of claims 1 through 13.
A wireless communication node configured to carry out the method of any one of claims 14 through 26.
A non-transitory computer-readable medium having stored thereon computer-executable instructions for carrying out the method of any one of claims 1 through 26.