CN114175766B

CN114175766B - Method, device and system for reporting power headroom of uplink transmission

Info

Publication number: CN114175766B
Application number: CN201980099002.1A
Authority: CN
Inventors: 张晨晨; 郝鹏; 魏兴光; 李儒岳; 姚珂
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2024-03-26
Anticipated expiration: 2039-08-07
Also published as: CN114175766A; WO2021022513A1

Abstract

Methods, apparatuses, and systems for reporting a power headroom of an uplink transmission are disclosed. In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises the following steps: determining a plurality of uplink transmissions in a plurality of corresponding cells supported by the wireless communication device, respectively; determining at least one Power Headroom Report (PHR) for a plurality of uplink transmissions from the wireless communication device to the 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 an uplink transmission for carrying the PHR from the plurality of uplink transmissions.

Description

Method, device and system for reporting power headroom of uplink transmission

Cross Reference to Related Applications

The present application relates to PCT international application attorney docket No. ZTE-2019-001363-WO/G6418-59900, filed on 7 of 2019 at 8, entitled "method, apparatus and system for determining power headroom for uplink transmissions", which application is expressly incorporated herein by reference in its entirety.

Technical Field

The present disclosure relates generally to wireless communications, and more particularly, to a method, apparatus, and system for reporting a power headroom of an uplink transmission in wireless communications.

Background

In a wireless network, in order for a Base Station (BS) to more accurately know uplink power usage of a terminal, a power headroom report (Power Headroom Report, PHR) mechanism is supported. That is, when a specific trigger condition is satisfied according to the configuration of the base station, the terminal will report a Power Headroom (PH) or report PH and a maximum transmission power (Pcmax) at the same time.

In a fifth generation (5G) new wireless (NR) system or a subsequent evolution system, various application types may be supported. The requirements of the PHR mechanism may be different for different application scenarios. For example, ultra-reliable low latency communication (URLLC) scenarios may require more accurate, more timely PHR trigger mechanisms because of their higher reliability requirements. Enhanced mobile broadband (eMBB) scenarios do not require very high reliability and may not require too frequent PHR trigger mechanisms. Different application scenarios may have different power control parameter ranges, and thus PHR calculations are different for different application types. Furthermore, the power control parameter configuration may also be different for the Physical Uplink Shared Channel (PUSCH) scheduled by the grant and the configured grant PUSCH, and thus their PHR calculation is also different. The existing method for reporting PHR does not consider the situation that the same terminal supports different application scenarios, which may correspond to different power control parameter configurations.

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

Disclosure of Invention

The exemplary embodiments disclosed herein are directed to solving problems associated with one or more of the problems set forth in the prior art and providing additional features that will become apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. According to various embodiments, exemplary systems, methods, devices, and computer program products are disclosed herein. However, it should be understood that these embodiments are presented by way of example and not limitation, and that various modifications of the disclosed embodiments may be made while remaining within the scope of the disclosure, as would be apparent to one of ordinary skill in the art from reading the disclosure.

In one embodiment, a method performed by a wireless communication device is disclosed. The method comprises the following steps: determining a plurality of uplink transmissions in a plurality of corresponding cells supported by the wireless communication device, respectively; determining at least one Power Headroom Report (PHR) for a plurality of uplink transmissions from the wireless communication device to the 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 an uplink transmission for carrying the PHR from the plurality of uplink transmissions.

In another embodiment, a method performed by a wireless communication node is disclosed. The method comprises the following steps: scheduling a plurality of uplink transmissions in a plurality of corresponding cells supported by the wireless communication device, respectively; and receiving, from the wireless communication device, an uplink transmission determined from a plurality of uplink transmissions, the uplink transmission for carrying a Power Headroom Report (PHR) Medium Access Control (MAC) Control Element (CE) comprising a report of at least one Power Headroom (PH). At least one PHR is determined for a plurality of uplink transmissions from the wireless communication device to the wireless communication node. In this disclosure, the terms "PH" and "PHR" may be used interchangeably.

In another embodiment, a wireless communication node configured to perform the method disclosed in a certain embodiment is disclosed. In yet another embodiment, a wireless communication device configured to perform the method disclosed in a certain embodiment is disclosed. In another embodiment, a non-transitory computer-readable medium having stored thereon computer-executable instructions for performing the method disclosed in a certain embodiment is disclosed. The above aspects and other aspects and embodiments thereof are described in more detail in the accompanying drawings, description and claims.

Drawings

Various exemplary embodiments of the present disclosure are described in detail below with reference to the following figures. The drawings are provided for illustrative purposes only and depict only exemplary embodiments of the disclosure for the convenience of the reader. Accordingly, the drawings should not be taken as limiting the breadth, scope, or applicability of the present disclosure. It should be noted that for clarity and ease of illustration, the drawings are not necessarily drawn to scale.

Fig. 1 illustrates an exemplary communication network in which the 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) according to some embodiments of the present disclosure.

Fig. 3 illustrates a flowchart of a method performed by a BS for uplink data transmission according to some embodiments of the present disclosure.

Fig. 4 illustrates a block diagram of a User Equipment (UE) according to some embodiments of the present disclosure.

Fig. 5 illustrates a flowchart of a method performed by a UE for reporting a Power Headroom Report (PHR) according to some embodiments of the disclosure.

Fig. 6 illustrates an example method for determining uplink transmissions for carrying power headroom reports in accordance with some embodiments of the disclosure.

Fig. 7 illustrates another example method for determining uplink transmissions for carrying a Power Headroom Report (PHR) according to some embodiments of the 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 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 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 disclosure.

Detailed Description

Various exemplary embodiments of the present disclosure are described below with reference to the drawings to enable one of ordinary skill in the art to make and use the disclosure. As will be apparent to those of ordinary skill in the art upon reading this disclosure, various changes or modifications may be made to the examples described herein without departing from the scope of the disclosure. Thus, the disclosure is not limited to the exemplary embodiments and applications described and illustrated herein. Furthermore, the particular order and/or hierarchy of steps in the methods disclosed herein are merely exemplary approaches. Based on design preferences, the specific order or hierarchy of steps in the methods or processes disclosed may be rearranged 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 that the present disclosure is not limited to the particular order or hierarchy presented, unless specifically stated otherwise.

A typical wireless communication network includes one or more base stations (often referred to as "BSs") that each provide geographic radio coverage and one or more wireless user equipment terminals (often referred to as "UEs") that can transmit and receive data within the radio coverage. According to the configuration of the BS, the UE may transmit a Power Headroom Report (PHR) Medium Access Control (MAC) Control Element (CE) to the BS. There are three types of PHR: type 1PHR, type 2PHR, and type 3PHR. The type 1PHR and the type 2PHR are calculated based on a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH), respectively, without considering a Sounding Reference Signal (SRS). The type 3PHR is calculated based on a Sounding Reference Signal (SRS) and may be applied to subframes without PUSCH/PUCCH transmission. Each of the three types of PHR is performed at a cell level. The UE will calculate PHR on each cell independently. For a UE supporting multiple cells, once a PHR is triggered in a certain cell, the UE reports PHR on all or multiple activated cells to the base station. For the activated cell, a type 1PHR or a type 3PHR will be transmitted. For cells that can transmit PUCCH, it will also feed back type 2PHR. For any type of PHR, if the UE actually transmits a corresponding uplink channel or signal, the UE calculates the PHR from real-time information of actual uplink transmission, such as power control parameters of the uplink channel or signal and occupied resources, and such calculated PHR is referred to as an actual PHR. If the UE does not transmit a corresponding uplink channel or signal, the UE calculates PHR according to a predefined or preconfigured power control parameter referring to an uplink transport format, and such calculated PHR is referred to as a virtual PHR.

The 5G NR system supports two types of PHR: type 1PHR and type 3PHR. The PHR may be real or virtual, depending on whether the PHR is calculated based on the actual transmission. The UE or terminal may 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 PHR of a single cell in Single Entry PHR MAC CE. If the terminal supports multiple cells, the terminal feeds PHR back to the base station in Multiple Entry PHR MAC CE.

Different PHR may be calculated for different application scenarios of the terminal. For the PHR that the terminal feeds back to the base station, the present teachings disclose a method for the base station to know to which application scenario or application type the PHR corresponds. Using the methods disclosed in the present teachings, a terminal can determine which uplink transmission is used to carry PHR feedback; the terminal can determine whether the PHR feedback of a certain cell is an actual PHR or a virtual PHR; both the terminal and the base station may determine on which type of uplink transmission the PHR fed back by the terminal was calculated; the terminal can feed back the actual PHR more frequently, so that the base station can obtain more accurate power headroom information; the terminal may reduce PHR feedback overhead and save uplink resources.

The methods disclosed in the present teachings may be implemented in a wireless communication network in which a BS and a UE may communicate with each other via a communication link (e.g., via a downlink radio frame from the BS to the UE or by an uplink radio frame from the UE to the BS). In various embodiments, a BS in the present disclosure may be referred to as a network side, and may 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), or the like; and a UE in the present disclosure may be referred to as a terminal and may include or be embodied as a Mobile Station (MS), station (STA), or the like. The BS and UE may be described herein as non-limiting examples of "wireless communication nodes" and "wireless communication devices," respectively, which may be in accordance with various embodiments of the present disclosure, may be methods disclosed herein, and may be capable of wireless and/or wireline communication.

Fig. 1 illustrates an exemplary communication network 100 in which the techniques disclosed herein may be implemented, according to embodiments of the present disclosure. As shown in fig. 1, an exemplary communication network 100 includes a Base Station (BS) 101 and a plurality of UEs (UE 1 110, UE 2 120 … UE 3 130), wherein the BS 101 may communicate with the UEs according to a wireless protocol. Each UE may transmit uplink data to the BS 101 using a transmission power set between 0 and a maximum transmission power. For uplink transmission, the UE may determine a Power Headroom Report (PHR) indicating a remaining power headroom at the UE and report the PH to the BS.

Fig. 2 illustrates a block diagram of a Base Station (BS) 200, according to some embodiments of the present disclosure. BS 200 is an example of a device that may be configured to implement the various methods described herein. As shown in fig. 2, BS 200 includes a housing 240, which housing 240 contains a system clock 202, a processor 204, a memory 206, a transceiver 210 including a transmitter 212 and a 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, system clock 202 provides timing signals to processor 204 for controlling the timing of all operations of BS 200. Processor 204 controls the general operation of BS 200 and may 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 Arrays (FPGAs), programmable Logic Devices (PLDs), controllers, state machines, gating logic, discrete hardware components, dedicated hardware finite state machines, or any other suitable circuit, device, and/or structure capable of performing data calculations or other operations.

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

Transceiver 210, including transmitter 212 and receiver 214, allows BS 200 to transmit data to and receive data 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, 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, which multi-antenna array 250 may form multiple beams, each beam pointing in a different direction. The transmitter 212 may be configured to wirelessly transmit data packets having different data packet types or functions, which are generated by the processor 204. Similarly, the receiver 214 is configured to receive data packets having different packet types or functions, and the processor 204 is configured to process data packets of a plurality of different packet types. For example, the processor 204 may be configured to determine the type of the data packet and process the data packet and/or fields of the data packet accordingly.

In wireless communication, BS 200 may receive an uplink transmission from a UE, wherein the uplink transmission is performed based on a transmission power associated with a power control parameter. For example, the uplink transmission scheduler 220 in this example may schedule a plurality of uplink transmissions in a plurality of corresponding cells supported by the UE, respectively. Each of the plurality of uplink transmissions is an earliest scheduled uplink transmission in a respective cell after a trigger condition associated with the PHR is satisfied. According to various embodiments, the plurality of uplink transmissions includes a transmission on at least one uplink transmission (e.g., PUSCH) scheduled by Downlink Control Information (DCI) and a transmission on at least one configured grant uplink transmission (e.g., configured grant PUSCH).

The PHR carrier analyzer 224 in this example may receive, from a UE, an uplink transmission determined from a plurality of uplink transmissions for carrying a Power Headroom Report (PHR) MAC CE comprising a report of at least one Power Headroom Report (PHR). At least one PHR may be determined for a 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 the following time domain locations: an end symbol or a reception time of DCI for scheduling each of at least one uplink transmission (e.g., at least one PUSCH); and a predetermined number of time units before a start symbol of each of the at least one configured grant uplink transmission (e.g., the at least one configured grant PUSCH). In another embodiment, the uplink transmission is determined based on a comparison of the following time domain locations: an end symbol or a reception time of DCI for scheduling each of the at least one uplink transmission; and a start symbol for each of the at least one configured grant uplink transmissions.

In another embodiment, the uplink transmission is received on an authorized uplink transmission having K repeated configurations. PHR is carried based on one of the following: only when an uplink transmission corresponds to a first repetition of a configured uplink transmission, a PHR is carried by the uplink transmission; when an uplink transmission corresponds to any repetition of a configured grant uplink transmission, the PHR is carried by the uplink transmission and will not be carried by any subsequent repetition of the configured grant uplink transmission; alternatively, when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, the PHR is carried by the 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 the DCI for carrying the PHR. The at least one PHR may be determined by at least one of: the UE determines a virtual PHR for each of a plurality of corresponding cells corresponding to the first configuration of authorized uplink transmissions, wherein a time position at a predetermined number of time units preceding a start symbol of the first configuration of authorized uplink transmissions is later than an end symbol of the DCI. The UE determines an actual PHR for each of a plurality of uplink transmissions corresponding to the second configuration of authorized uplink transmissions, wherein a time position at a predetermined number of time units preceding a start symbol of the second configuration of authorized uplink transmissions is no later than an end symbol of the DCI.

In another embodiment, a UE determines an actual PHR for each of a plurality of uplink transmissions corresponding to a configured authorized uplink transmission, the configured authorized uplink transmission at least partially overlapping with an uplink transmission carrying the PHR; and the UE determining a virtual PHR for each of a plurality of uplink transmissions corresponding to a configured authorized uplink transmission, the configured authorized uplink transmission not overlapping with an uplink transmission carrying the PHR.

In one embodiment, the plurality of uplink transmissions includes 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., PUSCH) associated with the reference time location and used to carry the PHR. In one example, the reference time position is located at an end symbol of DCI scheduling the uplink transmission. In another example, when the uplink transmission is a configured grant uplink transmission (e.g., a configured grant PUSCH), the reference time position is a first predetermined number of time units before a start symbol of the uplink transmission.

For the PHR determined based on SRS, the actual PHR is determined for: each of the at least one SRS transmission; each periodic SRS transmission of the at least one SRS transmission; each periodic SRS transmission in the at least one SRS transmission having a start symbol no later than a reference time position by more than a second predetermined number of time units; each semi-persistent SRS transmission in the at least one SRS transmission, the semi-persistent SRS transmission being activated by a control unit whose end symbol is no later than a reference time position; and/or each aperiodic SRS transmission in the at least one SRS transmission triggered by DCI whose end symbol is no later than a reference time position. For the PHR determined based on SRS, a virtual PHR is determined for: each periodic SRS transmission in the at least one SRS transmission having a start symbol later than the reference time position by more than a second predetermined number of time units; each semi-persistent SRS transmission in the at least one SRS transmission, the semi-persistent SRS transmission being activated by a control unit whose end symbol is later than a reference time position; and/or each aperiodic SRS transmission in the at least one SRS transmission triggered by DCI whose end symbol is later than the reference time position.

In one embodiment, the uplink transmission is received by the PHR carrier analyzer 224 on the uplink transmission associated with the deadline location and used to carry the PHR. The deadline location is the latest time at which the UE determines the 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 a plurality of uplink transmissions corresponding to a configured authorized uplink transmission having a start symbol exceeding a predetermined number of time units later than a deadline location. An actual PHR is determined for each of a plurality of uplink transmissions corresponding to a configured authorized uplink transmission having a start symbol no later than a deadline location by more than a predetermined number of time units. A virtual PHR is determined for each of a plurality of uplink transmissions corresponding to an uplink transmission scheduled by the DCI whose end symbol is later than the deadline location. An actual PHR is determined for each of a plurality of uplink transmissions corresponding to the uplink transmissions scheduled by the DCI whose end symbol is no later than the deadline location. For example, the uplink transmission may be PUSCH.

The power control parameter configurator 226 in this example may be configured to calculate power control parameters for the PHR. In one embodiment, for each of a plurality of corresponding cells that do not correspond to an uplink transmission carrying a PHR, the power control parameter configurator 226 may determine a configuration of at least one power control parameter associated with an uplink transmission scheduled by the DCI or an authorized uplink transmission configured in the corresponding cell. The configuration of the at least one power control parameter is used to determine a PHR for the corresponding cell. For example, the uplink transmission may 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 the PHR MAC CE; default uplink transmission types according to semi-static configuration of BS 200 or predefined according to the system; dynamic indication of the corresponding cell from BS 200; whether each of the uplink transmission scheduled by the DCI and the configured grant uplink transmission corresponds to an actual PHR or a virtual PHR; an end symbol of DCI for scheduling an uplink transmission; a predetermined number of time units before a start symbol of a configured grant uplink transmission; a transmission time for each of the uplink transmission scheduled by the DCI and the configured grant uplink transmission; whether each of the uplink transmission scheduled by the 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 the DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.

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

The various modules described above are coupled together by a bus system 230. The bus system 230 may include a data bus and include, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It should be understood that the modules of BS 200 may be operatively coupled to each other using any suitable techniques and media.

Although a number of individual modules or components are shown in fig. 2, one of ordinary skill in the art will appreciate that one or more of the modules may be combined or implemented together. For example, the processor 204 may implement not only the functionality described above with respect to the processor 204, but also the functionality described above with respect to the uplink transmission scheduler 220. Rather, each module shown in fig. 2 may be implemented using a plurality of separate components or elements.

Fig. 3 illustrates a flow chart of a method 300 for uplink data transmission performed by a BS (e.g., BS 200 in fig. 2) according to some embodiments of the present disclosure. At operation 302, the BS schedules a plurality of uplink transmissions in a plurality of corresponding cells supported by the UE, respectively. At operation 304, the BS receives, from the UE, an uplink transmission for carrying a Power Headroom Report (PHR) in a first cell, determined from a plurality of uplink transmissions. At operation 306, the BS determines, in each cell other than the first cell, a configuration of at least one power control parameter associated with an uplink transmission scheduled by the DCI or a configured authorized uplink transmission. 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. UE 400 is an example of a device that may be configured to implement the various methods described herein. As shown in fig. 4, the UE 400 includes a housing 440, the housing 440 containing a system clock 402, a processor 404, a memory 406, a transceiver 410 including 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, system clock 402, processor 404, memory 406, transceiver 410, and power module 408 operate in a manner similar to system clock 202, processor 204, memory 206, transceiver 210, and power module 208 in BS 200. The antenna 450 or multiple antenna arrays 450 are 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 in a plurality of corresponding cells supported by the UE 400, respectively; and determining at least one Power Headroom Report (PHR) for a plurality of uplink transmissions from the UE 400 to the BS. Each of the plurality of uplink transmissions is an earliest uplink transmission scheduled in a corresponding cell after a trigger condition associated with the PHR is satisfied. According to various embodiments, the plurality of uplink transmissions includes a transmission on at least one uplink transmission (e.g., at least one PUSCH) scheduled by Downlink Control Information (DCI), and a transmission on 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 at least one PHR. The PHR carrier determiner 424 in this example may determine an uplink transmission for carrying a PHR from a plurality of uplink transmissions.

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

In various embodiments, PHR carrier determiner 424 may determine an authorized uplink transmission having K repeated configurations. PHR may be carried based on one of the following: the PHR is carried by the uplink transmission only when the uplink transmission corresponds to a first repetition of a configured grant uplink transmission; when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, the PHR is carried by the uplink transmission and will not be carried by any subsequent repetition of the configured grant uplink transmission; alternatively, when the uplink transmission corresponds to any repetition of the configured grant uplink transmission, the PHR is carried by the uplink transmission and will be carried by each subsequent repetition of the configured grant uplink transmission.

In one embodiment, PHR carrier determiner 424 determines uplink transmissions scheduled by the DCI for carrying the PHR. The at least one PHR may be determined by at least one of: the power headroom determiner 420 determines a virtual PHR for each of a plurality of corresponding cells corresponding to the first configuration of authorized uplink transmissions, wherein a time position at a predetermined number of time units preceding a start symbol of the first configuration of authorized uplink transmissions is later than an end symbol of the DCI. The power headroom determiner 420 determines an actual PHR for each of a plurality of uplink transmissions corresponding to the second configuration of authorized uplink transmissions, wherein a time position at a predetermined number of time units preceding a start symbol of the second configuration of authorized uplink transmissions is no later than an end symbol of the DCI.

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

In one embodiment, the plurality of uplink transmissions includes at least one Sounding Reference Signal (SRS) transmission. PHR carrier determiner 424 determines uplink transmissions associated with the reference time locations and used to carry PHR. In one example, the reference time position is located at an end symbol of DCI scheduling an uplink transmission. In another example, when the uplink transmission is a configured grant uplink transmission, the reference time position is a first predetermined number of time units before a start symbol of the uplink transmission.

For SRS-based PHR, the power headroom determiner 420 may determine the actual PHR for: each of the at least one SRS transmission; each periodic SRS transmission of the at least one SRS transmission; each periodic SRS transmission in the at least one SRS transmission having a start symbol no later than a reference time position by more than a second predetermined number of time units; each semi-persistent SRS transmission in the at least one SRS transmission, the semi-persistent SRS transmission being activated by a control unit whose end symbol is no later than a reference time position; and/or each aperiodic SRS transmission in the at least one SRS transmission triggered by DCI whose end symbol is no later than the reference time position. For SRS-based PHR, the power headroom determiner 420 may determine a virtual PHR for: each periodic SRS transmission in the at least one SRS transmission having a start symbol that exceeds the reference time position by a second predetermined number of time units; each semi-persistent SRS transmission in the at least one SRS transmission, the semi-persistent SRS transmission being activated by a control unit whose end symbol is later than the reference time position; and/or each aperiodic SRS transmission in the at least one SRS transmission triggered by DCI whose end symbol is later than the reference time position.

In one embodiment, PHR carrier determiner 424 determines uplink transmissions associated with a deadline location and used to carry PHR. The deadline location is the latest time at which the UE determines the 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 a plurality of uplink transmissions corresponding to a configured authorized uplink transmission having a starting symbol exceeding a predetermined number of time units later than a deadline location. The power headroom determiner 420 determines an actual PHR for each of a plurality of uplink transmissions corresponding to a configured authorized uplink transmission having a starting symbol no later than a deadline location by more than a predetermined number of time units. The power headroom determiner 420 determines a virtual PHR for each of a plurality of uplink transmissions corresponding to the uplink transmissions scheduled by the DCI whose end symbol is later than the deadline location. The power headroom determiner 420 determines an actual PHR for each of a plurality of uplink transmissions corresponding to the grant-based uplink transmissions scheduled by the DCI whose end symbol is no later than the deadline location.

The power control parameter determiner 426 in this example may determine a power headroom determiner 420 for calculating the power control parameters of the PHR. In one embodiment, for each of a plurality of corresponding cells that do not correspond to an uplink transmission carrying a PHR, the power control parameter determiner 426 may determine a configuration of at least one power control parameter associated with an uplink transmission scheduled by the DCI or an authorized uplink transmission configured in the corresponding cell. The configuration of the at least one power control parameter is utilized by the power headroom determiner 420 to determine the PH of 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 of the UE 400, wherein the configuration is indicated by at least one bit in a control unit comprising the PHR; default uplink transmission types according to semi-static configuration of BS or according to system predefining; dynamic indication from BS for corresponding cell; whether each of the uplink transmission scheduled by the DCI and the configured grant uplink transmission corresponds to an actual PHR or a virtual PHR; an end symbol of DCI for scheduling an uplink transmission; a predetermined number of time units before a start symbol of a configured grant uplink transmission; a transmission time of each of the uplink transmission scheduled by the DCI and the configured grant uplink transmission; whether each of the uplink transmission scheduled by the 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 the DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.

The various modules described above are coupled together by a bus system 430. The bus system 430 may include a data bus, including, for example, a power bus, a control signal bus, and/or a status signal bus in addition to the data bus. It should be appreciated that the modules of the UE 400 may be operatively coupled to each other using any suitable techniques and media.

Although a number of individual modules or components are shown in fig. 4, one of ordinary skill in the art will appreciate that one or more of the modules may be combined or implemented together. For example, the processor 404 may implement not only the functions described above with respect to the processor 404, but also the functions described above with respect to the power headroom determiner 420. Rather, each of the modules shown in FIG. 4 may be implemented using a plurality of separate components or elements.

Fig. 5 illustrates a flowchart of a method 500 performed by a UE (e.g., UE 400 in fig. 4) for reporting PHR, according to some embodiments of the disclosure. At operation 502, the UE determines a plurality of uplink transmissions in a plurality of corresponding cells supported by the UE, respectively. At operation 504, the UE determines at least one Power Headroom Report (PHR) for a plurality of uplink transmissions from the UE to the BS. At operation 506, the UE generates a Power Headroom Report (PHR) MAC CE for reporting at least one PHR to the BS. At operation 508, the UE determines an uplink transmission from a plurality of uplink transmissions for carrying a PHR in a first cell. At operation 510, the UE determines a configuration of at least one power control parameter associated with an authorized uplink transmission of a DCI-scheduled uplink transmission or configuration 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.

Various embodiments of the present disclosure will now be described in detail below. Note that features of the embodiments and examples in this 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 an grant-based uplink transmission or an unlicensed uplink transmission. Grant-based uplink transmissions (e.g., grant-based PUSCH) are uplink transmissions scheduled by a grant; and an unlicensed uplink transmission (e.g., unlicensed PUSCH) is a configured licensed uplink transmission.

The base station configures a set of PHR trigger parameters for the terminal. The terminal determines when to trigger the PHR based on the set of PHR trigger parameters. The set of PHR trigger parameters includes at least one of: PHR period timer, PHR prohibit timer, path loss change threshold, whether feedback of type 2PHR is needed for another Cell Group (CG), whether feedback of multiple PHR is needed, etc.

As shown in fig. 6, the terminal determines to trigger a PHR at time t0 600 and supports a plurality of cells for uplink transmission. After time t0 600, there is an unlicensed PUSCH1 612 to be transmitted on Cell1 without DCI scheduling, there is a retransmission re-PUSCH2 622 scheduled by DCI 2 620 and to be transmitted on Cell2, there is a PUSCH3 632 scheduled by DCI 3 630 and to be transmitted on Cell3, and there is a PUSCH4 642 scheduled by DCI 4 640 and to be transmitted on Cell 4. The terminal needs to decide which Cell to feed back PHR on PUSCH based on at least one of the following rules, based on semi-static configuration of base stations or system predefining.

According to a first rule, after the PHR is triggered, it is determined which cell's DCI end symbol or "virtual DCI end symbol" has the earliest time-domain position. The PHR is then carried by PUSCH corresponding to the DCI end symbol or "virtual DCI end symbol" of the cell so determined. For a particular cell, the DCI is the DCI that the terminal first receives to schedule a non-retransmission PUSCH on the cell after the PHR is triggered. For a particular cell, the "virtual DCI end symbol" is a time position determined by pushing back T time units 605 from the start symbol of the unlicensed PUSCH transmitted first after PHR is triggered, according to semi-static configuration of the base station or system predefining. As shown in fig. 6, time t1 is a "virtual DCI end symbol". The time units may be symbols, minislots, slots, subframes, etc. The value of T may be the minimum value of N2 or K2.

According to this rule, in fig. 6, because time t1 precedes the DCI 4 640 end symbol and the DCI 3630 end symbol, the terminal will feedback PHR on unlicensed PUSCH1 on Cell 1.

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

According to the second rule, after the PHR is triggered, it is determined which cell's DCI end symbol or unlicensed PUSCH start symbol has the earliest time domain position. The PHR is then carried by the PUSCH corresponding to the DCI cell thus determined or the unlicensed PUSCH of the cell thus determined. For a particular cell, the DCI is the DCI that the terminal first receives to schedule a non-retransmission PUSCH on the cell after the PHR is triggered. For a particular cell, the unlicensed PUSCH start symbol is the start symbol of the unlicensed PUSCH that is transmitted first after the PHR is triggered, according to a semi-static configuration of the base station or system predefined. In fig. 7, the unlicensed PUSCH start symbol on Cell2 is time t1 701. According to this rule, in fig. 7, since time t1 701 is after DCI 4 740 ends the symbol, the terminal will feedback PHR on PUSCH4 742 on Cell 4.

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

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

Further, the base station may semi-statically configure the unlicensed PUSCH to perform repeated transmissions, e.g., using a repetition factor of k, where k is any positive integer. That is, the unlicensed PUSCH needs to be repeatedly transmitted k times. If the terminal is to feedback PHR on unlicensed PUSCH, it may employ one of the following modes based on semi-static configuration of the base station or system predefined. The present embodiment can also be extended to grant-based PUSCH.

In the first mode, the terminal can only feed back PHR on the first transmission of unlicensed PUSCH, but cannot feed back PHR on (k-1) subsequent iterations. Thus, if the first transmission of the unlicensed PUSCH is before the PHR trigger time, the terminal cannot feed back the PHR on the subsequent (k-1) repetition of the unlicensed PUSCH any more.

In the second mode, the terminal may transmit the feedback of PHR at any one of k repeated transmissions of the unlicensed PUSCH, but the PHR feedback will not be repeated and will be transmitted only once. For example, the terminal triggers PHR feedback at time t0, and then the terminal will transmit the nth repetition of the unlicensed PUSCH, where n is a positive integer no greater than k. The terminal feeds back the PHR on the nth repetition of the unlicensed PUSCH. The PHR feedback is no longer repeated on any subsequent (n+1) th to kth repetition of the unlicensed PUSCH.

In the third mode, the terminal may transmit the feedback of PHR on any one of k repeated transmissions of the unlicensed PUSCH, and the PHR feedback may also be repeated on the repeatedly transmitted unlicensed PUSCH. For example, the terminal triggers PHR feedback at time t0, and then the terminal will transmit the nth repetition of the unlicensed PUSCH, where n is a positive integer no greater than k. The terminal feeds back the PHR on the nth repetition of the unlicensed PUSCH. PHR feedback is also repeated on each of the subsequent (n+1) th to kth repetitions of the unlicensed PUSCH.

In a second embodiment, it is disclosed how to determine the actual or virtual PHR for unlicensed PUSCHs of other cells when the PHR is carried on an unlicensed PUSCH based on the grant. A terminal supports multiple cells for uplink transmission. After the PHR is triggered, the terminal determines that the PHR is to be fed back on PUSCH scheduled by DCI of Cell 1. Based on semi-static configuration of base stations or system predefining, the terminal has unlicensed PUSCHs to be transmitted on Cell2 and Cell 3. The terminal, when calculating PHR on Cell2 and Cell3, determines whether to calculate actual PHR or virtual PHR. This may be determined according to one of the following rules based on a semi-static configuration of the base station or predefined by the system.

According to the first rule, for Cell2 and Cell3, after PHR is triggered (at time t0 800), the terminal needs to transmit unlicensed PUSCH2 822 and unlicensed PUSCH3 832 according to the semi-static configuration of the base station, as shown in fig. 8. For Cell2 and Cell3, the terminal may determine a "virtual DCI end symbol" based on the unlicensed PUSCH start symbol. The "virtual DCI end symbol" of the unlicensed PUSCH may correspond to a symbol T1 determined by extending T time units 805 backward from the unlicensed PUSCH start symbol. In fig. 8, the "virtual DCI end symbol" of unlicensed PUSCH2 822 on Cell2 is time t1 801; the "virtual DCI end symbol" of unlicensed PUSCH3 832 on Cell3 is time t2 802. The terminal may use the end symbol of DCI scheduling PUSCH carrying PHR as a threshold. That is, the DCI1 810 end symbol in fig. 8 is used as a threshold. If the virtual DCI end symbol of the specific cell is not later than the threshold value, the terminal calculates the actual PHR for the cell; if the "virtual DCI end symbol" for a particular cell is later than a threshold, the terminal calculates a virtual PHR for that cell. According to the first rule, the terminal calculates the virtual PHR of Cell2 and calculates the actual PHR of Cell 3.

According to the second rule, for Cell2 and Cell3, after PHR is triggered (at time t0 800), the terminal needs to transmit unlicensed PUSCH2 and unlicensed PUSCH3 according to the semi-static configuration of the base station. Based on whether each of unlicensed PUSCH2 and unlicensed PUSCH3 overlaps with PHR-carrying PUSCH1, the terminal determines whether to calculate an actual PHR or a virtual PHR for each of Cell2 and Cell 3. If the unlicensed PUSCH on a particular cell partially or fully overlaps with the PUSCH carrying PHR, then calculating the actual PHR for that cell; if the unlicensed PUSCH on a particular cell does not overlap with the PUSCH carrying PHR, a virtual PHR is calculated for that cell. For example, as shown in fig. 8, both unlicensed PUSCH2 822 on Cell2 and unlicensed PUSCH3 832 on Cell3 overlap PUSCH1 812 carrying PHR. Thus, according to the second rule, the terminal calculates the actual PHR on Cell2 and Cell 3.

In a third embodiment, it is disclosed how to determine the actual or virtual PHR for a type 3 PHR. If the terminal wants to feed back the type 3PHR of a particular cell, the terminal needs to decide whether to calculate the actual PHR or the virtual PHR for the type 3PHR of that cell. The type 3PHR 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. The terminal determines a feedback actual PHR or virtual PHR for a specific type of SRS on the cell according to at least one of the following methods based on semi-static configuration of the base station or system predefining.

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

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

In method 3-3, for periodic SRS, the terminal first determines a "virtual DCI end symbol" that is determined by extending T time units backward from the SRS start transmission symbol. The time units may be symbols, minislots or slots. The terminal determines whether to calculate an actual PHR or a virtual PHR for the periodic SRS according to a sequential relationship between the "virtual DCI end symbol" and the "first DCI end symbol". If the virtual DCI end symbol is not later than the first DCI end symbol, the terminal calculates an actual PHR for the periodic SRS; otherwise, the terminal calculates the virtual PHR. The "first DCI end symbol" is an end symbol of DCI scheduling a PUSCH carrying a PHR, or a "virtual DCI end symbol" corresponding to an unlicensed PUSCH carrying a PHR.

In methods 3-4, for semi-persistent SRS, SRS is activated by MAC CE. The terminal may consider the end symbol of the received MAC CE as a "virtual DCI end symbol". Based on the sequential relationship between the "virtual DCI end symbol" and the "first DCI end symbol", the terminal may determine whether to calculate an actual PHR or a virtual PHR for the semi-persistent SRS. If the "virtual DCI end symbol" is not later than the "first DCI end symbol", the terminal calculates an actual PHR for the semi-persistent SRS; otherwise, the terminal calculates the virtual PHR. The "first DCI end symbol" is an end symbol of DCI scheduling a PUSCH carrying a PHR, or a "virtual DCI end symbol" corresponding to an unlicensed PUSCH carrying a PHR.

In method 3-5, for aperiodic SRS, SRS is triggered by DCI. The terminal may consider the end symbol of the received DCI as a "virtual DCI end symbol". According to the sequence relation between the "virtual DCI end symbol" and the "first DCI end symbol", the terminal determines whether to calculate an actual PHR or a virtual PHR for the aperiodic SRS. If the virtual DCI end symbol is not later than the first DCI end symbol, the terminal calculates an actual PHR for the aperiodic SRS; otherwise, the terminal calculates the virtual PHR. The "first DCI end symbol" is an end symbol of DCI scheduling a PUSCH carrying a PHR, or a "virtual DCI end symbol" corresponding to an unlicensed PUSCH carrying a PHR.

In a fourth embodiment, it is disclosed how to determine whether the PHR is calculated based on an unlicensed PUSCH or based on an licensed PUSCH. A terminal supports multiple cells for uplink transmission. After the PHR is triggered, the terminal determines to feed back the PHR on PUSCH1 of Cell 1. For Cell2, the terminal may transmit PUSCH scheduled by DCI or unlicensed PUSCH semi-statically configured by the base station. For both 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 PHR on Cell2 that the terminal feeds back to the base station, it is desirable to have some way for the base station to know whether PHR is calculated based on PUSCH scheduled by DCI or on unlicensed PUSCH. Both the base station and the terminal may learn open loop power control parameters and closed loop power control parameters for calculating feedback PHR on Cell2 according to at least one of the following methods based on semi-static configuration of the base station or system predefining.

In method 4-1, the indication in the PHR MAC CE may indicate whether the PHR is calculated based on authorized PUSCH power control parameters or on unlicensed PUSCH power control parameters. 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 PHR is calculated based on the grant-based PUSCH power control parameter; when this bit is set to 0, it indicates that PHR is calculated based on unlicensed PUSCH power control parameters. Alternatively, one or more bits in the PHR MAC CE may be used to indicate which candidate set of values and/or which value mapping table based PHR is calculated based on open-loop and/or closed-loop power control parameters.

The open loop power control parameter candidate set is predefined by the system or semi-statically configured by the base station, including at least one of: for P _O Is a set of one or more candidate values; one or more candidate value sets for alpha; for { P _O One or more candidate value sets for α; one or more measurement reference signals for measuring PL. A closed loop power control parameter candidate set comprising one or more TPC value mapping tables is predefined by the system or semi-statically configured by the base station.

In method 4-2, assuming that there is a predetermined relationship between the PUSCH type and the PHR type, the base station determines whether the PHR is calculated based on the PUSCH power control parameter based on grant or the PUSCH power control parameter without grant, according to an indication of whether the PHR is an actual type or a virtual type in the PHR MAC CE.

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

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

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

In method 4-6, the PUSCH type is determined based on the scheduling time priority principle. After the terminal triggers the PHR on the cell, the DCI end symbol based on the licensed PUSCH and the "dummy DCI end symbol" of the unlicensed PUSCH are compared to determine the PUSCH with an earlier scheduling time. The terminal calculates the feedback based on PHR corresponding to open-loop and/or closed-loop power control parameters of PUSCH with earlier scheduling times. The "virtual DCI end symbol" is a time position determined by pushing back T time units from the start symbol of the unlicensed PUSCH transmitted first after PHR is triggered according to semi-static configuration of a base station or system predefining. As shown in fig. 6, time t1 is a "virtual DCI end symbol". The time units may be symbols, minislots, slots, subframes, etc. The value of T may be the minimum value of N2 or K2.

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

In methods 4-8, the PUSCH type is determined based on the overlapping time priority principle. If only one of the unlicensed PUSCH and the grant-based PUSCH overlaps with the PHR-carrying PUSCH, either partially or completely in the time domain, the terminal will calculate PHR for cell feedback based on open-loop and/or closed-loop power control parameters corresponding to the overlapped PUSCH. If both the unlicensed PUSCH and the grant-based PUSCH partially or fully overlap the PHR-carrying PUSCH in the time domain, the terminal will calculate the PHR for the cell feedback based on open-loop and/or closed-loop power control parameters corresponding to the overlapping PUSCH with an earlier transmission time.

In a fifth embodiment, 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 does not decide the transmission power of the uplink transmission immediately after receiving the DCI for scheduling the uplink transmission, but waits until a certain deadline to decide the transmission power of the uplink transmission. In this embodiment, the terminal calculates the PHR once based on the look-ahead mechanism. Thus, the terminal can decide whether to feed back an actual PHR or a virtual PHR for each cell at the cutoff time.

As shown in fig. 9, the terminal has PHR feedback triggered at time t0 900. The terminal decides to transmit PHR feedback of Cell1, cell2, cell3 on PUSCH1 912 scheduled by DCI1 910 on Cell 1. Let t1 time 901 be the deadline for determining the uplink transmission power.

For Cell2, the terminal determines a "virtual DCI end symbol" for unlicensed PUSCH2 922. The "virtual DCI end symbol" is a time position determined by pushing back T time units 905 from the start symbol of unlicensed PUSCH2 922. As shown in fig. 9, time t2 is a "virtual DCI end symbol". The time units may be symbols, minislots, slots, subframes, etc. The value of T may be N2 or a minimum value of K2. Here, N2 isK2 is based on a semi-static configuration of the base station or system predefining, a minimum of a plurality of candidate scheduling delays between scheduling DCI and PUSCH scheduled by the DCI, or between scheduling DCI and PDSCH scheduled by the DCIValues. Therefore, on Cell2, the "virtual DCI end symbol", i.e., time t2, 902, precedes time t1 901. Thus, the terminal calculates and feeds back the actual PHR on Cell 2.

For Cell3, the end symbol of DCI3 930 for scheduling PUSCH3 932 is before deadline t1 901. Thus, for Cell3, the terminal calculates and feeds back the actual PHR.

For Cell4, the end symbol of DCI4 940 for scheduling PUSCH4 942 follows deadline t1 901. Thus, for Cell4, the terminal calculates and feeds back the virtual PHR.

As shown in fig. 10, the deadline is a time position determined by pushing back n time units from a start symbol of PUSCH carrying PHR, thereby generating a time point t1 1001. Alternatively, the deadline t1 1001 is determined by pushing forward by m time units from the end symbol of DCI 1010 scheduling PUSCH 1012 carrying the PHR. The time units may be symbols, minislots, slots, etc. The value of n may be determined based on any of the following methods.

In the method 5-1, the value of n may be equal to the time delay of the terminal processing the HARQ-ACK feedback corresponding to the PDSCH, and the specific values are:wherein->The variables involved in this formula have the following values. The value of N1 relates to terminal capability, PDSCH parameter set, uplink transmission parameter set, and DMRS time-frequency resource location. d, d _1,1 The value of (c) is related to PDSCH mapping type, terminal capability, and PDSCH time domain length. The value of μ relates to the PDCCH parameter set, PDSCH parameter set and uplink transmission parameter set. Time unit T _c ＝1/(Δf _max ·N _f ) Wherein Δf _max ＝480·10 ³ Hz and N _f =4096. Constant k=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 relate to a time delay for the terminal to process HARQ-ACK feedback corresponding to PDSCH, with specific values being:wherein->As described above, and k is a constant value such as 0.5, 1, etc.

In method 5-3, the value of n may relate to the time delay for the terminal to process the HARQ-ACK feedback corresponding to PDSCH, with specific values being:wherein->As described above, and k is an integer value such as 1, 2, 3, etc.

In method 5-4, the value of n may be equal to the time delay for the terminal to process HARQ-ACK feedback corresponding to the semi-persistent PDSCH release command, with specific values of:wherein->The variables involved in this formula have the following values. The value of N is related to the terminal capability and PDCCH parameter set, while other parameters have been discussed above. For a UE with processing capability 1 and for SCS of PDCCH reception, n=10 for 15khz, n=12 for 30khz, n=22 for 60khz, and n=25 for 120 khz. For UEs with capability 2 and SCS for PDCCH reception, n=5 for 15khz, n=5.5 for 30khz, and n=11 for 60 khz.

In method 5-5, the value of n may relate to the time delay for the terminal to process HARQ-ACK feedback corresponding to the semi-persistent PDSCH release command, with specific values of: Wherein->As described above, and k is a constant value such as 0.5, 1, etc.

In methods 5-6, the value of n may relate to the time delay for the terminal to process HARQ-ACK feedback corresponding to the semi-persistent PDSCH release command, with specific values of:wherein the method comprises the steps ofAs described above, and k is an integer value such as 1, 2, 3, etc.

In methods 5-7, the value of n may be equal to the time delay for the terminal to process the PUSCH scheduled by the PDCCH, with specific values of:wherein->The variables involved in this formula have the following values. N (N) ₂ Related to terminal capability, PDCCH parameter set and uplink transmission parameter set; d, d _2,1 =0 or d _2,1 ＝1；d _2,2 =0 or d _2,2 Equal to BWP conversion delay; while other parameters have been discussed above.

In methods 5-8, the value of n may relate to the time delay for the terminal to process the PUSCH scheduled by the PDCCH, with specific values of:wherein->As described above, and k is a constant value such as 0.5, 1, etc.

In methods 5-9, the value of n may be delayed from the time the terminal processes the PUSCH scheduled by PDCCHThe specific values are as follows:wherein->As described above, and k is an integer value such as 1, 2, 3, etc.

In the method 5-10, the value of n may be equal to the time delay of the terminal processing the PUCCH or PUSCH including aperiodic CSI feedback, and the specific value is: Wherein->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 methods 5-11, the value of n may relate to the time delay for the terminal to process PUCCH or PUSCH including aperiodic CSI feedback, with specific values of:wherein->As described above, and k is a constant of value (e.g., 0.5, 1, etc.).

In methods 5-12, the value of n may relate to the time delay for the terminal to process PUCCH or PUSCH including aperiodic CSI feedback, with specific values of:wherein->As described above, and k is an integer value such as 1, 2, 3, etc.

In this application, features from various embodiments may be used in combination in one embodiment without conflict. Each embodiment is merely an example 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, e.g., URLLC and eMBB, which are determined based on semi-static configuration of the base station or system predefining; according to different services of dynamic indication of DCI, such as different DCI format indication, or different DCI size indication, or different RNTI indication of scrambling DCI, or different DCI blind detection method indication, or a field indicated in DCI; different sets of candidate values corresponding to open loop power control parameters; different reference signals for path loss measurement; different value maps corresponding to 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 limitation. Likewise, the various figures may depict an example architecture or configuration provided to enable one of ordinary skill in the art to understand the example features and functionality of the disclosure. However, those skilled in the art will appreciate that the present disclosure is not limited to the exemplary architectures or configurations shown, but may be implemented using a variety of alternative architectures and configurations. In addition, one or more features of one embodiment may be combined with one or more features of another embodiment described herein, as would be understood by one of ordinary skill in the art. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described exemplary embodiments.

It will be further understood that any reference herein to an element using names such as "first," "second," etc. generally does not limit the number or order of such elements. Rather, these designations are used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, reference to first and second elements does not mean that only two elements can be used, or that the first element must somehow precede the second element.

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

Those of ordinary skill would further appreciate that any of the various illustrative logical blocks, modules, processors, devices, circuits, methods, and functions described in connection with the aspects disclosed herein may be implemented with electronic hardware (e.g., digital implementations, analog implementations, or a combination of both), firmware, various forms of program or design code containing instructions (which may be referred to herein as "software" or a "software module" for convenience), 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 may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure. According to various embodiments, processors, devices, components, circuits, structures, machines, modules, etc. may 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, those of ordinary skill in the art will appreciate that the various illustrative logical blocks, modules, devices, components, and circuits described herein may be implemented within or performed by an Integrated Circuit (IC) that may comprise 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. Logic blocks, modules, and circuits may also include antennas and/or transceivers to communicate with various components within the network or within the device. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, or state machine. A processor may 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 for performing the functions described herein.

If implemented in software, these functions may be stored on a computer-readable medium as one or more instructions or code. Thus, the steps of a method or algorithm disclosed herein may be embodied 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 used to transmit a computer program or code from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise 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 application, the term "module" as used herein refers to software, firmware, hardware, and any combination of these elements for performing the relevant functions described herein. In addition, for purposes of discussion, the various modules are described as discrete modules; however, as will 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 relevant functions in accordance with embodiments of the present disclosure.

Further, in embodiments of the present disclosure, memory or other memory and communication components may be used. It should be appreciated that for clarity, the above description has described embodiments of the 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 disclosure. For example, functions illustrated as being performed by separate processing logic elements or controllers may be performed by the same processing logic elements or controllers. Thus, references to specific functional units are only references to suitable means for providing the described functionality rather than indicative of a strict logical or physical structure or organization.

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

Claims

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

determining a plurality of uplink transmissions in a plurality of corresponding cells supported by the wireless communication device, respectively, wherein the plurality of uplink transmissions includes at least one uplink transmission scheduled by Downlink Control Information (DCI) and at least one configured grant uplink transmission;

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

an uplink transmission for carrying the PHR is determined from the plurality of uplink transmissions.

2. The method according to claim 1, wherein:

each of the plurality of uplink transmissions is an earliest uplink transmission scheduled in the corresponding cell after a trigger condition associated with the PHR is satisfied.

3. The method of claim 1, wherein determining the uplink transmission comprises comparing time domain locations of:

an end symbol for scheduling DCI for each of at least one of the plurality of uplink transmissions; and

a predetermined number of time units before a start symbol of each of the grant uplink transmissions configured by at least one of the plurality of uplink transmissions.

4. The method of claim 1, wherein determining the uplink transmission comprises comparing time domain locations of:

a starting symbol for each of the authorized uplink transmissions configured by at least one of the plurality of uplink transmissions.

5. The method according to claim 1, wherein:

determining the uplink transmission includes determining an authorized uplink transmission having a configuration of K repetitions; and is also provided with

The PHR is carried based on one of the following:

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

When the uplink transmission corresponds to any repetition of the configured grant uplink transmission, the PHR is carried by the uplink transmission and is to be carried by each subsequent repetition of the configured grant uplink transmission.

6. The method according to claim 1, wherein:

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

determining the at least one PHR includes:

determining a virtual PHR for each of the plurality of corresponding cells corresponding to the first configuration of authorized uplink transmissions, wherein a time position at a predetermined number of time units preceding a start symbol of the first configuration of authorized uplink transmissions is later than an end symbol of the DCI, and

An actual PHR is determined for each of the plurality of uplink transmissions corresponding to a second configuration of authorized uplink transmissions, wherein a time position at the predetermined number of time units preceding a start symbol of the second configuration of authorized uplink transmissions is no later than the end symbol of the DCI.

7. The method according to claim 1, wherein:

determining the at least one PHR includes:

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

a virtual PHR is determined for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission, the configured grant uplink transmission not overlapping with the uplink transmission.

8. The method according to claim 1, wherein:

the plurality of uplink transmissions includes at least one Sounding Reference Signal (SRS) transmission;

determining the uplink transmission includes determining an uplink transmission associated with a reference time location and used to carry the PHR;

The reference time position is located at an end symbol of DCI scheduling the uplink transmission or a first predetermined number of time units before a start symbol of the uplink transmission when the uplink transmission is a configured grant uplink transmission.

9. 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;

each periodic SRS transmission in the at least one SRS transmission having a start symbol no later than the reference time position by more than a second predetermined number of time units;

each semi-persistent SRS transmission in the at least one SRS transmission, the semi-persistent SRS transmission being activated by a control unit whose ending symbol is no later than the reference time position; and/or

Each aperiodic SRS transmission in the at least one SRS transmission, the aperiodic SRS transmission triggered by DCI whose end symbol is no later than the reference time position.

10. The method of claim 8, wherein determining the at least one PHR comprises determining a virtual PHR for:

Each periodic SRS transmission in the at least one SRS transmission having a start symbol later than the reference time position by more than a second predetermined number of time units;

each semi-persistent SRS transmission in the at least one SRS transmission, the semi-persistent SRS transmission being activated by a control unit whose end symbol is later than the reference time position; and/or

Each aperiodic SRS transmission in the at least one SRS transmission triggered by DCI whose end symbol is later than the reference time position.

11. The method of claim 1, further comprising:

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

wherein the configuration of the at least one power control parameter is used to determine a PHR for the corresponding cell.

12. The method of claim 11, wherein the configuration of the at least one power control parameter is determined based on:

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

a default uplink transmission type according to a semi-static configuration of the wireless communication node or according to a system predefined;

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

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

an end symbol of DCI for scheduling the uplink transmission;

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

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

whether each of the uplink transmission scheduled by 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 DCI and the configured grant uplink transmission is a first uplink transmission overlapping with an uplink transmission carrying the PHR.

13. The method according to claim 1, wherein:

determining the uplink transmission includes determining an uplink transmission associated with a deadline location and used to carry the PHR;

the deadline location is a latest time at which the wireless communication device determines a transmission power of the uplink transmission carrying the PHR; and

determining the at least one PHR includes:

determining a virtual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission, a start symbol of the configured grant uplink transmission being more than a predetermined number of time units later than the expiration time position,

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission, the configured grant plurality of uplink transmissions having a start symbol no later than the expiration 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 end symbol is later than the deadline location, and/or

An actual PHR is determined for each of the plurality of uplink transmissions corresponding to the grant-based uplink transmissions scheduled by the DCI having an end symbol no later than the deadline location.

14. 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, wherein the plurality of uplink transmissions includes at least one uplink transmission scheduled by Downlink Control Information (DCI) and at least one configured grant uplink transmission; and

receiving an uplink transmission from the wireless communication device, the uplink transmission being for carrying a Power Headroom Report (PHR) Medium Access Control (MAC) Control Element (CE), the 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.

15. The method according to claim 14, wherein:

16. The method of claim 14, wherein the uplink transmission is determined based on a comparison of time domain locations of:

17. The method of claim 14, wherein the uplink transmission is determined based on a comparison of time domain locations of:

18. The method according to claim 14, wherein:

the uplink transmission is received on an authorized uplink transmission having K repeated configurations; and is also provided with

The PHR is carried based on one of the following:

19. The method according to claim 14, wherein:

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

The at least one PHR is determined by:

20. The method according to claim 14, wherein:

The at least one PHR is determined by:

determining an actual PHR for each of the plurality of uplink transmissions corresponding to a configured authorized uplink transmission at least partially overlapping the uplink transmission carrying the PHR, an

A virtual PHR is determined for each of the plurality of uplink transmissions corresponding to a configured authorized uplink transmission, the configured authorized uplink transmission not overlapping with the uplink transmission carrying the PHR.

21. The method according to claim 14, wherein:

the uplink transmission is received on an uplink transmission associated with a reference time location and used to carry the PHR;

the reference time position is located either at an end symbol of DCI scheduling the uplink transmission or, when the uplink transmission is a configured authorized uplink transmission, a first predetermined number of time units before a start symbol of the uplink transmission.

22. The method of claim 21, wherein the actual PHR is determined for:

each of the at least one SRS transmission;

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

23. The method of claim 21, wherein the virtual PHR is determined for:

24. The method of claim 14, further comprising:

25. The method of claim 24, wherein the configuration of the at least one power control parameter is determined based on:

An end symbol of DCI for scheduling the uplink transmission;

26. The method according to claim 14, wherein:

the uplink transmission is received on an uplink transmission associated with a deadline location and used to carry the PHR;

the deadline location is a latest time at which the wireless communication device determines a transmission power of the uplink transmission on the uplink transmission; and

the at least one PHR is determined by:

Determining an actual PHR for each of the plurality of uplink transmissions corresponding to a configured grant uplink transmission, a start symbol of the configured grant uplink transmission not later than the expiration time position exceeding the predetermined number of time units,

27. A wireless communication device comprising at least one processor and a memory, wherein the at least one processor is configured to read code from the memory and to perform the method of any of claims 1 to 13.

28. A wireless communication node comprising at least one processor and a memory, wherein the at least one processor is configured to read code from the memory and to perform the method of any of claims 14 to 26.

29. A non-transitory computer-readable medium having stored thereon computer-executable instructions for performing the method of any of claims 1 to 26.