Method and apparatus for reporting PHR for supporting dynamic waveform switching

Abstract

Methods and apparatus for reporting PHR for supporting dynamic waveform switching are disclosed. The apparatus includes: a receiver that receives downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; a processor that determines a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform; and a transmitter that transmits the first PHR and / or the second PHR for the active serving cell.

Description

Technical Field

[0001] The subject matter disclosed herein relates generally to wireless communications and, more particularly, but not limited to, methods and apparatus for reporting power headroom reports (PHRs) for supporting dynamic waveform switching. Background Art

[0002] The following abbreviations and acronyms are defined herein, at least some of which are referred to in this specification:

[0003] 3rd Generation Partnership Project (3GPP), fifth generation (5G), new radio (NR), 5G Node B (gNB), long term evolution (LTE), LTE advanced (LTE-A), E-UTRAN Node B (eNB), universal mobile telecommunications system (UMTS), world interoperability for microwave access (WiMAX), evolved UMTS terrestrial radio access network (E-UTRAN), wireless local area network (WLAN), orthogonal frequency division multiplexing (OFDM), single carrier frequency division multiple access (SC-FDMA), downlink (DL), uplink (UL), user equipment (UE), network equipment (NE), radio access technology (RAT), reception or receiver (RX or Rx), transmission or transmitter (TX or Tx), physical downlink control channel (PDC PDCCH), physical uplink shared channel (PUSCH), binary phase shift keying (BPSK), bandwidth part (BWP), control element (CE), cyclic prefix (CP), downlink control information (DCI), frequency division multiple access (FDMA), index / identifier (ID), medium access control (MAC), medium access control-control element (MAC-CE), modulation and coding scheme (MCS), orthogonal amplitude modulation (QAM), orthogonal phase shift keying (QPSK), resource block (RB), radio resource control (RRC), reference signal (RS), subcarrier spacing (SCS), time division multiplexing (TDM), transmit receive point (TRP), component carrier (CC), dual connectivity (DC), discrete Fourier transform (DFT), E-UTRA NR dual connectivity (EN-DC), Frequency range 1 (FR1), Frequency range 2 (FR2), Maximum power reduction (MPR), Peak to average power ratio (PAPR), Technical specification (TS), Universal Terrestrial Radio Access (UTRA), Discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM), Evolved Universal Terrestrial Radio Access (E-UTRA), NR-E-UTRA dual connectivity (NE-DC), Universal Terrestrial Radio Access Network (UTRAN), Power headroom report (PHR), Cyclic prefix orthogonal frequency division multiplexing (CP-OFDM), Path loss (PL), Path loss reference signal (PL-RS).

[0004] In wireless communications, such as the 3rd Generation Partnership Project (3GPP) mobile network, the wireless mobile network can provide seamless wireless communication services for wireless communication terminals with mobility, i.e., user equipment (UE). The wireless mobile network can be composed of multiple base stations, and the base stations can perform wireless communications with the UE.

[0005] 5G New Radio (NR) is the latest standard in the 3GPP family of standards and supports very high data rates with lower latency than its predecessor, LTE (4G). 3GPP defines two types of frequency ranges (FR). Frequencies below the 6 GHz range (450 to 6000 MHz) are referred to as FR1, and the millimeter wave range (24.25 GHz to 52.6 GHz) is referred to as FR2. 5G NR supports both FR1 and FR2 bands.

[0006] Enhancements to multi-TRP / panel transmissions are studied, which include improving the reliability and robustness of both ideal and non-ideal backhaul between these TRPs (Transmit Receive Points). A TRP is a device that transmits and receives signals and is controlled by the gNB through the backhaul between the gNB and the TRPs.

[0007] Two waveforms, DFT-s-OFDM and CP-OFDM, are supported in NR UL transmission to take advantage of the advantages of different waveforms in different scenarios.

[0008] For PUSCH transmission using DFT-s-OFDM, only one layer is supported, while the CP-OFDM waveform can support up to eight layers of PUSCH transmission. However, the PAPR of the DFT-s-OFDM waveform is lower, and therefore the efficiency of the UE's power amplifier is higher compared to the CP-OFDM waveform. For example, if the UE is located at the center of the cell, CP-OFDM can be used to transmit the PUSCH to obtain higher throughput; and if the UE is located at the edge of the cell, DFT-s-OFDM can be used to transmit the PUSCH because it provides better coverage due to higher power efficiency. Summary of the invention

[0009] A method and apparatus for reporting a PHR for supporting dynamic waveform switching is disclosed.

[0010] According to a first aspect, an apparatus is provided, comprising: a receiver that receives downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; a processor that determines a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform; and a transmitter that sends the first PHR and / or the second PHR for the active serving cell.

[0011] According to a second aspect, an apparatus is provided, comprising: a transmitter that sends downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; and a receiver that receives, for the active serving cell, a first power headroom report (PHR) corresponding to the first waveform and / or a second PHR corresponding to the second waveform.

[0012] According to a third aspect, a method is provided, comprising: receiving, by a receiver, downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; determining, by a processor, a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform; and sending, by a transmitter, the first PHR and / or the second PHR for the active serving cell.

[0013] According to a fourth aspect, a method is provided, comprising: sending, by a transmitter, downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; and receiving, by a receiver, a first power headroom report (PHR) corresponding to the first waveform and / or a second PHR corresponding to the second waveform for the active serving cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The embodiments will be described in more detail with reference to specific embodiments shown in the accompanying drawings. Given that these drawings depict only some embodiments and are not to be considered limiting in scope, the embodiments will be described and explained with additional specificity and detail through the use of the accompanying drawings, in which:

[0015] Figure 1 is a schematic diagram illustrating a wireless communication system according to some embodiments of the present disclosure;

[0016] Figure 2 is a schematic block diagram illustrating components of a user equipment (UE) according to some embodiments of the present disclosure;

[0017] Figure 3 is a schematic block diagram illustrating components of a network equipment (NE) according to some embodiments of the present disclosure;

[0018] Figure 4A is a schematic block diagram showing an example of actual PUSCH transmission of different waveforms overlapping with a time slot for transmitting a PHR according to some embodiments of the present disclosure;

[0019] Figure 4B is a diagram showing different waveforms according to some embodiments of the present disclosure and a schematic block diagram of an example of calculation of a PHR;

[0020] Figure 5A is a schematic block diagram illustrating an example of a single-entry PHR MAC-CE for PHR reporting of different waveforms according to some embodiments of the present disclosure;

[0021] Figure 5B is a schematic block diagram illustrating an example of a separate single-entry PHR MAC-CE for waveform PHR reporting according to some embodiments of the present disclosure;

[0022] Figure 5C is a schematic block diagram illustrating an example of a separate multi-entry PHR MAC-CE for PHR reporting of a waveform for a UE configured with multiple serving cells according to some embodiments of the present disclosure;

[0023] Figure 6 is a schematic block diagram illustrating an example of a path loss variation problem in dynamic waveform switching according to some embodiments of the present disclosure;

[0024] Figure 7 is a flowchart illustrating steps for reporting a PHR for supporting UE dynamic waveform switching according to some embodiments of the present disclosure; and

[0025] Figure 8 is a flow chart illustrating steps of receiving a PHR for supporting UE dynamic waveform switching according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0026] Those skilled in the art will appreciate that aspects of the embodiments may be embodied as systems, devices, methods or program products. Thus, the embodiments may take the form of all-hardware embodiments, all-software embodiments (including firmware, resident software, microcode, etc.), or embodiments combining software and hardware aspects.

[0027] Furthermore, one or more embodiments may take the form of a program product embodied in one or more computer-readable storage devices storing machine-readable code, computer-readable code, and / or program code, hereinafter referred to as “code.” The storage device may be tangible, non-transitory, and / or non-transmitting.

[0028] Throughout this specification, references to "one embodiment," "an embodiment," and "an example," "some embodiments," "some examples," or similar language mean that the particular feature, structure, or characteristic being described is included in at least one implementation or example. Therefore, the phrases "in one embodiment," "in an example," "in some embodiments," and instances of similar language throughout this specification may, but do not necessarily, all refer to the same embodiment. It may or may not include all disclosed embodiments. Unless expressly provided otherwise, features, structures, elements, or characteristics described in conjunction with one or some embodiments also apply to other embodiments. Unless expressly provided otherwise, the terms "include," "comprising," "having," and variations thereof mean "including but not limited to."

[0029] Unless expressly specified otherwise, an enumerated listing of items does not imply that any or all of the items are mutually exclusive. The terms "a," "an," and "the" also mean "one or more," and similar items in the plural include one or more instances of the item unless expressly specified otherwise.

[0030] Throughout this disclosure, the terms "first", "second", "third", etc. are used only as terms for related devices, components, procedural steps, etc., and do not imply any spatial or temporal order, unless otherwise expressly specified. For example, "first device" and "second device" may refer to two separately formed devices, or two parts or components of the same device. For example, in some cases, "first device" and "second device" may be the same and may be named arbitrarily. Similarly, the "first step" of a method or process may be performed after or simultaneously with the "second step".

[0031] It should be understood that the term "and / or" used herein refers to and includes any and all possible combinations of one or more associated listed items. For example, "A and / or B" may refer to any of the following three combinations: only A exists, only B exists, and A and B coexist. The character " / " usually indicates an "or" relationship of related items. However, this may also include an "and" relationship of associated items. For example, "A / B" means "A or B", and may also include the coexistence of A and B, unless the context indicates otherwise.

[0032] In addition, the described features, structures or characteristics of the embodiments may be combined in any suitable manner. In the following description, many specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a comprehensive understanding of the embodiments. However, those skilled in the relevant art will recognize that the embodiments may be practiced without one or more specific details, or using other methods, components, materials, etc. In other instances, well-known structures, materials or operations are not shown or described in detail to avoid blurring the various aspects of the embodiments.

[0033] Aspects of various embodiments are described below with reference to schematic flow charts and / or schematic block diagrams of methods, apparatuses, systems, and program products. It should be understood that each block of the schematic flow charts and / or schematic block diagrams, as well as combinations of blocks in the schematic flow charts or schematic block diagrams, can be implemented by code. The code can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine, so that instructions executed by a processor of a computer or other programmable data processing device create a device for implementing the functions or actions specified in the schematic flow charts and / or schematic block diagrams.

[0034] The code may also be stored in a storage device that can instruct a computer, other programmable data processing device, or other device to operate in a specific manner so that the instructions stored in the storage device produce a product including instructions for implementing the functions or actions specified in the schematic flowchart and / or schematic block diagram.

[0035] The schematic flow chart and / or schematic block diagram in the figure show the architecture, function and operation of the possible implementation methods of different devices, systems, methods and program products according to various embodiments. In this regard, each box in the schematic flow chart and / or schematic block diagram can represent a module, segment or part of a code, which includes one or more executable instructions for implementing the code of a specified logical function. However, those skilled in the relevant art will recognize that the flow chart does not necessarily need to be put into practice in the order shown, and can be put into practice without one or more specific steps or with other steps not shown.

[0036] It should also be noted that in some alternative implementations, the functions marked in the identified blocks may appear in the order marked in the figure. For example, depending on the functions involved, two blocks shown in succession may actually be executed substantially simultaneously, or the blocks may sometimes be executed in reverse order.

[0037] Figure 11 is a schematic diagram showing a wireless communication system. It depicts an embodiment of a wireless communication system 100. In one embodiment, the wireless communication system 100 may include a user equipment (UE) 102 and a network equipment (NE) 104. Figure 1 A specific number of UEs 102 and NEs 104 are depicted in FIG. 1 , but those skilled in the art will recognize that any number of UEs 102 and NEs 104 may be included in the wireless communication system 100 .

[0038] UE 102 may be referred to as a remote device, a remote unit, a subscriber unit, a mobile device, a mobile station, a user, a terminal, a mobile terminal, a fixed terminal, a subscriber station, a user terminal, an apparatus, a device, a user equipment, or by other terminology used in the art.

[0039] In one embodiment, UE 102 may be an autonomous sensor device, an alarm device, an actuator device, a remote control device, etc. In some other embodiments, UE 102 may include a computing device such as a desktop computer, a notebook computer, a personal digital assistant (PDA), a tablet computer, a smart phone, a smart TV (e.g., a TV connected to the Internet), a set-top box, a game console, a security system (including security cameras), a vehicle-mounted computer, a network device (e.g., a router, a switch, a modem), etc. In some embodiments, UE 102 includes a wearable device such as a smart watch, a fitness band, an optical head-mounted display, etc. UE 102 may communicate directly with one or more NEs 104.

[0040] NE 104 may also be referred to as a base station, access point, access terminal, base station, node-B, eNB, gNB, home node-B, relay node, device, equipment, or any other term used in the art. Throughout this specification, references to base stations may refer to any of the above types of network devices 104 such as eNBs and gNBs.

[0041] The NEs 104 may be distributed over a geographic area. The NEs 104 are typically part of a radio access network that includes one or more controllers that are communicatively coupled to one or more corresponding NEs 104. The radio access network is typically communicatively coupled to one or more core networks, which may be coupled to other networks, such as the Internet and a public switched telephone network. These and other elements of the radio access and core networks are not shown, but are generally known to those of ordinary skill in the art.

[0042] In one embodiment, the wireless communication system 100 complies with 3GPP 5G New Radio (NR). In some embodiments, the wireless communication system 100 complies with the 3GPP protocol, wherein the NE 104 transmits using an OFDM modulation scheme on the DL, and the UE 102 transmits using an SC-FDMA scheme or an OFDM scheme on the uplink (UL). However, more generally, the wireless communication system 100 may implement some other open or proprietary communication protocols, such as WiMAX. The present disclosure is not intended to be limited to the implementation of any particular wireless communication system architecture or protocol.

[0043] The NE 104 can serve multiple UEs 102 within a service area of, for example, a cell (or cell sector) or multiple cells via wireless communication links. The NE 104 sends DL communication signals to serve the UEs 102 in the time, frequency, and / or spatial domains.

[0044] Communication links are provided between NE 104 and UE 102a, 102b, which may be NR UL or DL ​​communication links, for example. Some UEs 102 may communicate with different radio access technologies (RATs) such as NR and LTE simultaneously. A direct or indirect communication link between two or more NEs 104 may be provided.

[0045] The NE 104 may also include one or more transmit receive points (TRPs) 104a. In some embodiments, the network device may be a gNB 104 that controls multiple TRPs 104a. In addition, there is a backhaul between two TRPs 104a. In some other embodiments, the network device may be a TRP 104a controlled by a gNB.

[0046] A communication link is provided between the NE 104, 104a and the UE 102, 102a, respectively, which may be, for example, a NR UL / DL communication link. Some UEs 102, 102a may communicate with different radio access technologies (RATs) such as NR and LTE simultaneously.

[0047] In some embodiments, a UE 102a may be able to simultaneously communicate with two or more TRPs 104a utilizing non-ideal or ideal backhaul. A TRP may be a transmission point of a gNB. Multiple beams may be used by the UE and / or the TRP. The two or more TRPs may be TRPs of different gNBs or TRPs of the same gNB. That is, different TRPs may have the same Cell-ID or different Cell-IDs. The terms "TRP," "transmit-receive point," and "transmit-receive identity" may be used interchangeably throughout the disclosure.

[0048] Figure 2 2 is a schematic block diagram of components of a user equipment (UE) according to one embodiment. UE 200 may include a processor 202, a memory 204, an input device 206, a display 208, and a transceiver 210. In some embodiments, the input device 206 and the display 208 are combined into a single device, such as a touch screen. In some embodiments, UE 200 may not include any input device 206 and / or display 208. In various embodiments, UE 200 may include one or more processors 202 and may not include an input device 206 and / or display 208.

[0049] In one embodiment, the processor 202 may include any known controller capable of executing computer-readable instructions and / or capable of performing logical operations. For example, the processor 202 may be a microcontroller, a microprocessor, a central processing unit (CPU), a graphics processing unit (GPU), an auxiliary processing unit, a field programmable gate array (FPGA), or a similar programmable controller. In some embodiments, the processor 202 executes instructions stored in the memory 204 to perform the methods and routines described herein. The processor 202 is communicatively coupled to the memory 204 and the transceiver 210.

[0050] In one embodiment, the memory 204 is a computer-readable storage medium. In some embodiments, the memory 204 includes a volatile computer storage medium. For example, the memory 204 may include a RAM, including a dynamic RAM (DRAM), a synchronous dynamic RAM (SDRAM) and / or a static RAM (SRAM). In some embodiments, the memory 204 includes a non-volatile computer storage medium. For example, the memory 204 may include a hard drive, a flash memory, or any other suitable non-volatile computer storage device. In some embodiments, the memory 204 includes both volatile and non-volatile computer storage media. In some embodiments, the memory 204 stores data related to the triggering conditions for sending the measurement report to the network device. In some embodiments, the memory 204 also stores program code and related data.

[0051] In one embodiment, input device 206 may include any known computer input device, including a touchpad, buttons, keyboard, stylus, microphone, etc. In some embodiments, input device 206 may be integrated with display 208, such as a touch screen or similar touch-sensitive display.

[0052] In one embodiment, the display 208 may include any known electronically controllable display or display device. The display 208 may be designed to output visual, audio, and / or tactile signals.

[0053] In one embodiment, the transceiver 210 is configured to wirelessly communicate with a network device. In some embodiments, the transceiver 210 includes a transmitter 212 and a receiver 214. The transmitter 212 is used to send UL communication signals to the network device, and the receiver 214 is used to receive DL communication signals from the network device.

[0054] The transmitter 212 and the receiver 214 may be any suitable type of transmitter and receiver. Although only one transmitter 212 and one receiver 214 are shown, the transceiver 210 may have any suitable number of transmitters 212 and receivers 214. For example, in some embodiments, the UE 200 includes multiple transmitter 212 and receiver 214 pairs for communicating on multiple wireless networks and / or radio frequency bands, wherein each of the transmitter 212 and receiver 214 pairs is configured to communicate on a different wireless network and / or radio frequency band.

[0055] Figure 3 3 is a schematic block diagram illustrating components of a network device (NE) 300 according to one embodiment. The NE 300 may include a processor 302, a memory 304, an input device 306, a display 308, and a transceiver 310. As can be appreciated, the processor 302, the memory 304, the input device 306, the display 308, and the transceiver 310 may be similar to the processor 202, the memory 204, the input device 206, the display 208, and the transceiver 210 of the UE 200, respectively.

[0056] In some embodiments, the processor 302 controls the transceiver 310 to transmit a DL signal or data to the UE 200. The processor 302 may also control the transceiver 310 to receive a UL signal or data from the UE 200. In another example, the processor 302 may control the transceiver 310 to transmit a DL signal containing various configuration data to the UE 200.

[0057] In some embodiments, the transceiver 310 includes a transmitter 312 and a receiver 314. The transmitter 312 is used to send DL communication signals to the UE 200, and the receiver 314 is used to receive UL communication signals from the UE 200.

[0058] The transceiver 310 may communicate with multiple UEs 200 simultaneously. For example, the transmitter 312 may send DL communication signals to the UE 200. As another example, the receiver 314 may simultaneously receive UL communication signals from the UE 200. The transmitter 312 and the receiver 314 may be any suitable type of transmitter and receiver. Although only one transmitter 312 and one receiver 314 are shown, the transceiver 310 may have any suitable number of transmitters 312 and receivers 314. For example, the NE 300 may serve multiple cells and / or cell sectors, wherein the transceiver 310 includes a transmitter 312 and a receiver 314 for each cell or cell sector.

[0059] Two waveforms, DFT-s-OFDM and CP-OFDM, are supported in NR UL transmission to promote the advantages of different waveforms in different scenarios. If transform precoding is disabled, DFT-s-OFDM will be used for UL transmission, and if transform precoding is enabled, CP-OFDM will be used. In RAN1 #110b, it was agreed to support DCI-level waveform switching between DFT-s-OFDM and CP-OFDM, but when and how the gNB decides to switch waveforms is still under discussion. In RAN1 #111, PHR was proposed as a candidate metric to assist gNB in ​​waveform selection. However, the current PHR is based on a configured waveform that does not support dynamic waveform switching. Enhancements on how to calculate PHRs corresponding to different waveforms and how to report PHRs for different waveforms are provided in the present disclosure.

[0060] In addition, the PHR triggering event may also need to be enhanced. For example, if the path loss (PL) change in two adjacent PHRs is greater than dB, the PHR will be triggered according to the current trigger event. However, in the case of dynamic waveform switching, if the path loss reference signal (PL-RS) used to calculate the PHR for different waveforms is different, whether to use one or two PLs based on PL-RS measurement to determine the PL change and how to determine the PL change will also be discussed in this disclosure.

[0061] The following is an example of a PH report as provided in 3GPP's current technical specification TS 38.213.

[0062] 7.7.1 Type 1 PH Report

[0063] If the UE determines that the Type 1 power headroom report for the active serving cell is based on actual PUSCH transmissions, then for PUSCH transmission opportunity i on active UL BWP b of carrier f of serving cell c, the UE shall calculate the Type 1 power headroom report as follows:

[0064] [dB]

[0065] Among them, in clause 7.1.1, , , , , , and .

[0066] If the UE is configured with multiple cells for PUSCH transmission, the serving cell Carrier Activities of ULBWP SCS configuration on Less than in the serving cell Carrier Activities of UL BWP SCS configuration on , and if the UE is in communication with an active UL BWP Active UL BWP on multiple time slots overlapping Type 1 power headroom report is provided in PUSCH transmissions in timeslots on the UE, the UE The time slots on the active UL BWP completely overlap A Type 1 power headroom report for a first PUSCH is provided in a first time slot of a plurality of time slots in the serving cell. Carrier Activities of UL BWP On and in the service area Carrier Activities of UL BWP same SCS configuration as on the UE and if the UE is in active UL BWP Type 1 power headroom report is provided in PUSCH transmissions in timeslots on the UE, the UE Active UL BWP on time slot overlap A Type 1 power headroom report for the first PUSCH is provided on the timeslot on (if any).

[0067] If the UE is configured with multiple cells for PUSCH transmission and provides Type 1 power headroom reporting in a PUSCH transmission with PUSCH repetition type B with cross-active UL BWP multiple time slots and with the active UL BWP If the nominal repetition overlaps with one or more timeslots, the UE will Active UL BWP overlapped by multiple time slots on nominal repetition A type 1 power headroom report for the first PUSCH is provided on a first time slot (if any) of the one or more time slots on the PUSCH.

[0068] For a UE configured with EN-DC / NE-DC and with dynamic power sharing capability, if the E-UTRA Dual Connectivity PHR [14, TS 36.321] is triggered, the UE provides the power headroom for the first PUSCH on the determined NR timeslot (if any) as described in clause 7.7.

[0069] If the UE is configured with multiple cells for PUSCH transmission, the UE does not consider the serving cell if the following conditions are met: Carrier Activities of UL BWP In the first PUSCH transmission of the initial transmission of a transport block, the serving cell Carrier Activities of UL BWP Calculate Type 1 Power Headroom Report on a second PUSCH transmission that overlaps with a first PUSCH transmission:

[0070] - the second PUSCH transmission is scheduled by the DCI format in the PDCCH received at the second PDCCH monitoring occasion, and

[0071] - The second PDCCH monitoring occasion is after the first PDCCH monitoring occasion in which the UE detects the earliest DCI format that schedules the initial transmission of a transport block after triggering a power headroom report

[0072] - The second PUSCH transmission is based on the first uplink symbol of the first PUSCH transmission minus Afterwards, among them, is determined according to [6, TS 38.214], assuming , , and if the first PUSCH transmission after triggering the power headroom report is in a configured grant, with a subcarrier spacing corresponding to the active downlink BWP of the scheduled cell for the configured grant .

[0073] If the UE determines that the type 1 power headroom report for the activated serving cell is based on the reference PUSCH transmission, then for the serving cell Carrier Activities of UL BWP PUSCH transmission timing on , the UE calculates the Type 1 power headroom report as:

[0074] [dB]

[0075] in, It is calculated assuming that MPR = 0 dB, A-MPR = 0 dB, and P-MPR = 0 dB. MPR, A-MPR, P-MPR and Defined in [8-1, TS 38.101-1], [8-2, TS 38.101-2] and [8-3, TS 38.101-3]. The remaining parameters are defined in clause 7.1.1, where and is used and Obtained, is used and Obtained.

[0076] If the UE has two UL carriers configured for the serving cell and the UE determines the Type 1 power headroom report for the serving cell based on the reference PUSCH transmission, the UE assumes that There is a reference PUSCH transmission on the provided UL carrier to calculate the Type 1 power headroom report for the serving cell. If a UE is provided with , then the UE assumes that Type 1 power headroom report for the serving cell is calculated with reference PUSCH transmission on the provided UL carrier. If no reference PUSCH transmission is provided to the UE for either of the two UL carriers , the UE assumes that there is a reference PUSCH transmission on the non-supplementary UL carrier to calculate the Type 1 power headroom report of the serving cell.

[0077] If the UE is in the time slot In service area Carrier Activities of UL BWP Send on RS resource index associated PUSCH, as described in clause 7.1.1, and is indexed with the RS resource The actual PUSCH repetition associated with the type 1 power headroom report is used to provide the type 1 power headroom report for the time slot Overlapping RS resource indexes The first PUSCH repetition associated with the

[0078] If the UE is in the serving cell in time slot n Carrier Activities of UL BWP Send on RS resource index associated PUSCH, as described in clause 7.1.1, and twoPHRMode is provided, the UE provides the second RS resource index Type 1 power headroom report for the associated PUSCH repetition, as described in clause 7.1.1, where,

[0079] - If the UE is indexed with the first RS resource The associated actual PUSCH repetition provides a Type 1 power headroom report,

[0080] - If the UE sends a signal with the second RS resource index in time slot n The associated PUSCH is repeated, then the UE is the second RS resource index overlapping with time slot n The first actual PUSCH repetition associated with the type 1 power headroom report

[0081] - Otherwise, the UE is indexed with the second RS resource The associated reference PUSCH transmission provides a Type 1 power headroom report

[0082] - Otherwise, if the UE is indexed with the first RS resource The reference PUSCH transmission associated with the UE provides a type 1 power headroom report, then the UE is associated with the second RS resource index The associated reference PUSCH transmission provides a battery headroom report.

[0083] The following is an example of UE maximum power reduction provided in the current technical specification TS 38.101 of 3GPP.

[0084] 6.2.2.3 Maximum output power reduction for UEs of power class 3

[0085] For power class 3, the MPR for consecutive allocations is defined as:

[0086]

[0087] For transmission bandwidth configurations less than or equal to 200 MHz, and 0≤ <Ceil(1 / 3 ) or Ceil ((2 / 3 )- )< ≤ - :

[0088] - when Less than or equal to 1.44 MHz, =2.5 dB,

[0089] - When 1.44 MHz< <=4.32 MHz, =2.0 dB,

[0090] - Otherwise =0 dB.

[0091] The maximum power reduction due to the modulation order, transmission bandwidth configuration and waveform type listed in Table 5.3.2-1 is defined for FR2-1 in Table 6.2.2.3-1 .

[0092] Defined in Table 6.2.2.3-1b for FR2-2.

[0093]

[0094] PHR calculation for each waveform

[0095] Type 1 UE Power Headroom (PH) indicates the maximum transmit power configured for the UE The difference between the required power for PUSCH transmission in the active BWP of the serving cell assuming that the transmit power of PUSCH transmission is not capped. Type 1 PHR can be calculated based on actual PUSCH transmission (ie, actual PHR) or based on reference PUSCH transmission (ie, virtual PHR).

[0096] If the UE determines that the Type 1 power headroom report of the active BWP of the serving cell is based on the actual PUSCH transmission, the UE calculates the Type 1 power headroom report, i.e. the actual PHR, as follows:

[0097]

[0098] [dB], (1)

[0099] Among them, it is defined in clause 7.1.1 of TS 38.213 v17.3.0 , , , , , and .

[0100] If the UE determines that the Type 1 power headroom report is based on a reference PUSCH transmission, the UE calculates the Type 1 power headroom report, i.e., the virtual PHR, as follows:

[0101] [dB], (2)

[0102] in, It is calculated assuming that MPR = 0 dB, A-MPR = 0 dB, and P-MPR = 0 dB. MPR, A-MPR, P-MPR, and .

[0103] It is the maximum output power configured by the UE calculated by the UE according to TS38.101 with a certain MPR value. Two waveforms are supported for PUSCH transmission in NRRel-15, namely, CP-OFDM and DFT-s-OFDM. DFT-s-OFDM only supports single-layer transmission for coverage-limited scenarios, while CP-OFDM supports multi-layer PUSCH transmission for higher data rate transmission. In addition, according to TS38.101, different value, because for PUSCH transmissions with different waveforms, the modulation scheme and RB allocation may be different. For PHR calculation based on actual PUSCH transmission, the parameters in equation (1) are It may also be different for different waveforms as it is determined by the indicated modulation scheme, the number of allocated RBs and the number of layers of scheduled PUSCH.

[0104] Waveform-specific PHR is introduced to assist gNB in ​​dynamic waveform selection. The following three cases are considered for each corresponding to different waveforms. and pH calculation.

[0105] Case 1: There are actual PUSCH transmissions with two different waveforms overlapping with the timeslot of the PHR report.

[0106] Figure 4A is a schematic block diagram illustrating an example of actual PUSCH transmission of different waveforms overlapping with a time slot in which a PHR is transmitted according to some embodiments of the present disclosure.

[0107] For the case where there is an actual PUSCH transmission with CP-OFDM and DFT-s-OFDM that overlaps with the time slot in which the PHR is transmitted, the CP-OFDMs and DFT-s-OFDM can be calculated based on the corresponding actual PUSCH transmission of the corresponding waveform. and PH. This means that formula (1) is used to calculate the actual PHR for different waveforms, and the parameters in formula (1) are determined by the actual PUSCH transmission with the corresponding waveform. If there are multiple actual PUSCH transmissions corresponding to waveforms overlapping the timeslot in which the PHR is sent, then the calculation is based on the first PUSCH transmission of the waveform overlapping the timeslot of the PHR report. The first PUSCH transmission may be the PUSCH with the earliest starting symbol among those PUSCH transmissions overlapping with the time slot of the PHR report.

[0108] Figure 4A 4 shows a case where there is an actual PUSCH transmission 402 with CP-OFDM (i.e., PUSCH #1) and an actual PUSCH transmission 404 with DFT-s-OFDM (i.e., PUSCH #2) that overlaps with the time slot of the PHR transmission 410. That is, there is an actual PUSCH transmission where each waveform overlaps in the time domain with the time slot in which the first PHR and / or the second PHR are transmitted. If there is an active serving cell, different PUSCH transmissions with different waveforms can be transmitted via TDM within the time slot, such as Figure 4A If there are multiple activated serving cells, different PUSCH transmissions with different waveforms can be sent via TDM within a time slot or between time slots (inter-slot), as shown in FIG. Figure 4A As shown in part (b), the subcarrier spacing (SCS) of the UL active bandwidth part (BWP) in the first component carrier CC#1 and the second component carrier CC#2 are different. In this example, PHR 410 is transmitted through CC#1, and PUSCH#1 402 and PUSCH#2 404 are transmitted through CC#2.

[0109] In some examples of the present disclosure, when there are one or more PUSCH transmissions corresponding to CP-OFDM and / or one or more PUSCH transmissions corresponding to DFT-s-OFDM that overlap with the timeslot in which the PHR is reported, the UE can calculate the PH value for each waveform based on the first (i.e., earliest) actual PUSCH transmission among those transmissions that overlap with the timeslot corresponding to the PHR report of the waveform.

[0110] Figure 4B is a diagram showing different waveforms according to some embodiments of the present disclosure Schematic block diagram of an example of calculation of a power headroom report (PHR) and a PHR. In this example, the UE is configured with two serving cells for PUSCH transmission, where the SCS of the active UL BWP of CC#1 is 15 KHz and the SCS of the active UL BW of CC#2 is 30 KHz. The UE provides a type 1 power headroom report (PHR) 410 in a PUSCH transmission in a timeslot on the active UL BWP of CC#1.

[0111] In CC#2, the dynamically scheduled PUSCH is transmitted in slot n with repetitions 402a and 402b (i.e., PUSCH#1 and PUSCH#2), and the waveform indicated is CP-OFDM. The configured grant PUSCH#3 404 is transmitted in slot n+1 with DFT-s-OFDM. In this case, both slot n and slot n+1 of CC#2 overlap with the slot of CC#1 where PHR 410 is reported.

[0112] Then, the UE will calculate the CP-OFDM based on PUSCH#1. and PHR because it is the first or earliest PUSCH of CP-OFDM; and the DFT-s-OFDM will be calculated based on PUSCH#3 which is the only PUSCH of DFT-s-OFDM. and PH.

[0113] Case 2: There is no actual PUSCH transmission of a specific waveform overlapping with the timeslot where the PHR is transmitted.

[0114] For the case where there may be one or more actual PUSCH transmissions with only a certain waveform, or the waveform utilized in the current PHR transmission opportunity, the corresponding waveform may be calculated by formula (1) based on the first actual PUSCH transmission overlapping the timeslot of the PHR report. and PHR.

[0115] For other waveforms, or waveforms that are not used in the current PHR transmission opportunity, since there is no actual PUSCH transmission, it is necessary to determine how to calculate and PH. proposed the following method.

[0116] Method 1: Calculate PHR of other waveforms based on virtual PHR

[0117] Since there is no actual PUSCH transmission corresponding to the waveform utilized in other or current PHR transmission occasions, the PHR may be represented as a virtual PHR and calculated based on formula (2).

[0118] Method 1-1: All parameters for calculation of virtual PHR are predefined and waveform specific.

[0119] As shown in formula (2) in the current standard, the relevant parameters in formula (2) are predefined and independent of the waveform. In order to reflect the PH difference between different waveforms with virtual PH, different parameter sets for calculating virtual PH are predefined for different waveforms, such as modulation scheme, RB allocation (i.e., edge RB allocation, outer RB allocation, or inner RB allocation), and the number of scheduled RBs. For different waveforms, the parameter set can be configured to be the same or different. When the UE needs to report the PH of other waveforms, When PH and , the corresponding predefined parameter set will be used in formula (2).

[0120] Method 1-2: Calculate another waveform based on actual PUSCH transmission .

[0121] The enhanced equation (2) is calculated by assuming actual PUSCH transmission with other waveforms. , and the scheduling parameters of the assumed PUSCH are the same as those of the actual PUSCH transmission, and except for the The other parameters are the same as those specified in the standard. The parameter values ​​are the same as those for the actual scheduled PUSCH transmission, but the parameter interpretation is different for different waveforms. For example, although the MCS values ​​for different waveforms are the same, different modulation schemes for different waveforms specified in TS 38.214 are determined as different MCS tables. In this example, the PHR for the waveform not utilized in the current PHR transmission opportunity is a virtual PHR based on formula (2), even though the parameters are derived from the actual PUSCH for the utilized waveform.

[0122] The UE can configure its maximum output power based on the waveform of the PUSCH transmission, the RB allocation of the PUSCH transmission, the modulation scheme, etc. Therefore, although different waveforms All are calculated based on actual PUSCH transmission, but different waveforms Similarly, different waveforms of PHR are not only different for different The PHR corresponding to the indicated waveform or the utilized waveform is different, and the PHR corresponding to another waveform is different, which is a virtual PHR. And PHR can help gNB to perform waveform switching.

[0123] Method 2: Calculate the PHR of other waveforms based on the actual PHR

[0124] In this method, according to formula (1), by assuming that the same parameter value as the current actual PUSCH transmission of the utilized waveform will be used for scheduling, the non-utilized waveform in the current PHR transmission opportunity is calculated based on the assumed actual PUSCH transmission. and PHR, as the actual PHR.

[0125] The scheduling parameter values ​​for the hypothetical PUSCH transmission of the non-utilized waveform are the same as the scheduling parameter values ​​for the actual PUSCH transmission, but when calculating the PHR for other waveforms, as in Method 1-2, the interpretation is based on the non-utilized waveform. may be different. and modulation scheme related Item, the PH of different waveforms may also be different. and PH can help gNB to perform waveform switching. In this method, since the PH of other waveforms is calculated based on the actual PUSCH transmission by formula (1), the following parameters should be determined:

[0126] This parameter is the number of scheduled RBs for the actual PUSCH transmission. As specified in TS 38.211, the number of scheduled RBs for PUSCH transmission using DFT-s-OFDM is a multiple of 2, 3, or 5. Therefore, if the actual PUSCH transmission is CP-OFDM and the other waveform is DFT-s-OFDM, then It may not be a multiple of 2, 3, or 5. Regarding how to determine in calculating PHR when the other waveform is DFT-s-OFDM The following two methods are proposed for the value of

[0127] As a first method, when calculating the PHR of DFT-s-OFDM, the DFT-s-OFDM The value is a multiple of 2, 3, or 5 and is less than or, alternatively, a multiple of 2, 3, or 5 and greater than However, this value is only used for PHR calculation and not the actual number of RBs allocated for PUSCH transmission with DFT-s-OFDM. Another approach is to use the same number of RBs as for PHR calculated for CP-OFDM when calculating PHR for DFT-s-OFDM, i.e., use 0 without any restriction. .

[0128] This parameter is a modulation scheme dependent offset used to adjust the transmit power and is used if the deltaMCS of the serving cell is configured. In addition, if PUSCH is transmitted on more than one layer, then = 0. If the actual PUSCH is CP-OFDM and has more than one layer, then =0. However, for DFT-s-OFDM, since it can only support one layer of PUSCH transmission, the number of indicated layers can be assumed to be 1 when calculating the PHR of DFT-s-OFDM. That is, when calculating the PHR of DFT-s-OFDM, the UE should always assume that the number of layers is 1 and ignore the actual number of indicated layers of the actual PUSCH transmission. When the actual PUSCH transmission is CP-OFDM with more than one layer, = 0. When calculating the PH of DFT-s-OFDM, it should be determined by assuming single-layer transmission. For other cases, for example, when the actual PUSCH transmission is CP-OFDM with one layer, or when the actual PUSCH transmission is DFT-s-OFDM, .

[0129] Case 3: There is no actual PUSCH transmission corresponding to any waveform overlapping with the time slot where the PHR is transmitted.

[0130] For the case where there is no actual PUSCH transmission corresponding to either of the two waveforms, i.e., there is no actual PUSCH transmission using CP-OFDM, and there is no actual PUSCC transmission using DFT-s-OFDM and overlaps with the time slot in which the PHR is reported, the PHR for each waveform is a virtual PHR and is calculated by formula (2). In order to reflect the difference in PHR between different waveforms, method 1 in case 2 can be repeated for each waveform. That is, all parameters used to calculate the virtual PHR are predefined and waveform-specific. The parameters may include, for example, a modulation scheme, an RB allocation (i.e., edge RB allocation, outer RB allocation, or inner RB allocation), and the number of scheduled RBs. For different waveforms, the parameter set may be configured to be the same or different.

[0131] PHR report for each waveform

[0132] Calculate the waveforms in the UE After configuring the waveform-specific PHR, the UE shall report these values ​​to the gNB for waveform selection. If the UE is not configured with a waveform-specific PHR, the UE shall select a PH and its corresponding Make a report.

[0133] For some examples, the UE may always report the PH and Alternatively, the UE may always report the PH and .

[0134] For some other examples, the UE may always report the PH and Alternatively, the UE may always report the PH and .

[0135] If the UE is configured to report two PHRs for two waveforms, it should be determined how the UE reports the different and PH to avoid ambiguous understanding between UE and gNB.

[0136] In some examples, the UE may report the Alternatively, the UE may report only the other waveforms , because except The rest of the terms are the same except for PH, and the PH of other waveforms can be inferred or derived by the gNB. This means that the UE reports the PH of the indicated waveform and and only reports the other waveforms .

[0137] In some examples, whether the UE can report one PHR or two PHRs for different waveforms is determined by the UE's capabilities. If the UE reports that it is capable of reporting two PHRs for different waveforms, the gNB may configure the UE to report one PHR or two PHRs for different waveforms through RRC signaling.

[0138] The following method is proposed for reporting different PHRs for different waveforms to the gNB.

[0139] Method 1: Report different PHR MAC-CEs for different waveforms and / or PH

[0140] Figure 5A is a schematic block diagram illustrating an example of a single-entry PHR MAC-CE for PHR reporting of different waveforms according to some embodiments of the present disclosure.

[0141] In this example, the The two sets of and PH correspond to the CP-OFDM and DFT-s-OFDM of the serving cell. Each set of PHs provides a virtual indication for indicating whether the PHR is an actual PHR or a virtual PHR. For example, for the first waveform, the PHR MAC-CE may include the first PH 512, the first 514 and a first virtual indication 516. For the second waveform, the PHR MAC-CE may also include a second PH 522, a second 524 and a second virtual indication 526 .

[0142] In order to avoid ambiguity between UE and gNB, each and / or PH defines the corresponding waveform. One method is to first and / or PH (which means in the first position of MAC-CE), or in the first position of PHR MAC-CE and / or PH, an indication or configuration waveform that is always used for the first PUSCH transmission overlapping with the time slot of the PHR transmission; and a second and / or PH is always used for another waveform. Another method is to first and / or PH are always used for a specific waveform, e.g., CP-OFDM (or DFT-s-OFDM), and the second and / or PH is always used for another waveform, e.g., DFT-s-OFDM (or CP-OFDM).

[0143] For multiple-entry PHR MAC-CE for PHR reporting of different waveforms in multiple serving cells, the same rules as in single-entry PHR MAC-CE apply for PHR reporting for each serving cell. This means that in each serving cell configured to report waveform-specific PHR, different waveforms for each serving cell are reported. and / or pH.

[0144] Method 2: Reporting different waveforms in separate PHR MAC-CEs and PH

[0145] Figure 5B is a schematic block diagram illustrating an example of a separate single-entry PHR MAC CE for waveform PHR reporting according to some embodiments of the present disclosure.

[0146] In this method, PH and PH for different waveforms are reported in different MAC CEs through separate PHR procedures. To avoid ambiguity between the UE and the gNB, a new field or a reserved field in the PHR MAC-CE may be used to indicate which PHR MAC-CCE is for which waveform. In this example, the PHR MAC-CE may include PH 512, 514 and waveform indication 510.

[0147] like Figure 5BAs shown, the 1-bit "W" field (i.e., the original reserved bit) can be used to indicate which waveform the PHR MAC-CE reports. For example, if "W" is "0", it may indicate that the waveform includes and PHR MCA-CE of PH is for CP-OFDM (or DFT-s-OFDM); and if 'W' is '1', it may indicate that PHR MAC-CE is for DFT-s-OFDM (or CP-OFDM).

[0148] Figure 5C is a schematic block diagram illustrating an example of a single multi-entry PHR MAC-CE for PHR reporting of waveforms for a UE configured with multiple serving cells according to some embodiments of the present disclosure. The above rules may also apply to UEs configured with multiple serving cells. That is, the same rules may be used for PHR reporting of waveforms in each serving cell in the multi-entry PHR MAC-CE. The PHR is for one waveform in a serving cell, while the PHR for different serving cells may be for the same or different waveforms.

[0149] However, for a multi-entry PHR MAC-CE, there may not be enough reserved bits to indicate the waveform, and a new field for waveform indication may be introduced to indicate which waveform the corresponding PHR in the PHR MAC-CCE is reported for. Each W indicates the waveform corresponding to the PHR of each serving cell. Figure 5C As shown, a multi-entry PHR MAC-CE may include PH and Multiple sets of, for example, PH and The first set, the second set and the third set of PH and The first set may include a first PH 512, a first 514, a first virtual indication 516 and a first waveform indication 510. PH and The second set may include a second PH 522, a second 524, a second virtual indication 526 and a second waveform indication 520. PH and The third set may include a third PH 532, a third 534 , a third virtual indication 536 , and a third waveform indication 530 .

[0150] PHR trigger event

[0151] In the current standard, if expires or has expired, and at least one active serving cell PL for any MAC entity whose active DL BWP is not a dormant BWP has changed by more than dB, a Power Headroom Report (PHR) should be triggered.

[0152] The path loss (PL) variation of a cell is between the PL measured at the current time on the current PL-RS and the PL measured at the transmission time of the last PHR transmission on the then used PL-RS, regardless of whether the PL-RS has changed in between.

[0153] In a conventional system, in an active serving cell, the UE reports only one PHR for the configured waveform, and one PL-RS may be determined in each PHR transmission opportunity. Therefore, the PL change may be a PL change based on two PL-RS measurements in two adjacent PHRs. However, in a dynamic waveform switching scenario, different PHRs for different waveforms may be reported in each PHR transmission opportunity, and more than one PL-RS may be measured at each PHR transmission if the PL-RS used to calculate the PHR for different waveforms is different.

[0154] Figure 6 6 is a schematic block diagram illustrating an example of a path loss variation problem in dynamic waveform switching according to some embodiments of the present disclosure. In this example, four PL-RSs are determined in two consecutive PHR reporting opportunities (i.e., PHR transmission opportunity n and PHR transmission opportunity n+1), where PL-RS#1 602 and PL-RS#4 604 are used for CP-OFDM, and PL-RS#2 612 and PL-RS#3 614 are used for DFT-s-OFDM. The following method is proposed on how to define PL variation.

[0155] Method 1: PL changes are defined within the same waveform and when When it expires or has expired, if any PL change corresponding to the waveform in the serving cell has changed by more than dB, the PHR is triggered.

[0156] If the PL-RS used for PHR calculations for different waveforms are different, a waveform-specific PL change for the cell can be defined. The PL change for a waveform is the PL measured at the current time on the current PL-RS used for PH calculation of the waveform, and the PL measured at the transmission time of the last PHR transmission on the then-used PL-RS used for PH calculation of the same waveform. That is, the PL change is compared between the PL measured based on the two PL-RSs for PH calculation of the same waveform. If any PL change has changed by more than dB, the PHR will be triggered.

[0157] For example, Figure 6 As shown, the PL change for CP-OFDM is defined as the PL measured based on PL-RS #4 604 and the PL measured based on PL-RS #1 602; and the PL change for DFT-s-OFDM is defined as the PL measured based on PL-RS #3 614 and the PL measured based on PL-RS #2 612. If any one of the PL change for CP-OFDM and the PL change for DFT-s-OFDM changes by more than dB, the PHR will be triggered.

[0158] Method 2: PL changes are defined within the same waveform and when When it expires or has expired, and if the waveform-specific PL variation in the serving cell has changed by more than dB, the PHR is triggered.

[0159] In this method, the waveform-specific PL changes are the same as in method 1. However, per-waveform trigger events may result in PHR being sent frequently. To reduce overhead, it may be determined that if only one of the predefined PL changes for CP-OFDM or DFT-s-OFDM exceeds dB, the PHR will be triggered.

[0160] Method 3: PL change is defined between PLs measured based on the PL-RS used to calculate the first PH (or second PH) in the PHR MAC-CE.

[0161] In this method, the PL change is the PL measured at the current time on the current PL-RS used for the first PH calculation (or the second PH calculation) and the PL measured at the transmission time of the last PHR transmission on the then used PL-RS used for the first PH calculation (or the second PH calculation) in the serving cell. The first PH is the PH at the first position in the PHR MAC-CE, or the PH at the frontmost position in the PHR MAC-CCE, for example, Figure 5APH#1 512 shown. When expires or has expired, and the PL changes by more than dB, the PHR will be triggered.

[0162] Method 4: PL variation is defined as the maximum or minimum variation among PLs measured by different PL-RSs.

[0163] In this method, four different PL change candidates can be calculated, including:

[0164] 1) PL31 is the PL change between the PL measured based on PL-RS#3 614 and the PL measured based on PL-RS#1 602,

[0165] 2) PL32 is the PL change between the PL measured based on PL-RS#3 614 and the PL measured based on PL-RS#2 612,

[0166] 3) PL41 as the PL change between the PL measured based on PL-RS#4 604 and the PL measured based on PL-RS#1 602, and

[0167] 4) PL42 is the PL change between the PL measured based on PL-RS#4 604 and the PL measured based on PL-RS#2 612 .

[0168] In one example, the PL change can be defined as the minimum value among four PL change candidates. expires or has expired, and if the minimum value exceeds dB, PHR will be triggered.

[0169] In another example, the PL change can be defined as the maximum value among four PL change candidates. dB and When it is due or has expired, the PHR will be triggered.

[0170] Figure 7 is a flow chart illustrating steps of reporting a PHR for supporting dynamic waveform switching of a UE 200 according to some embodiments of the present disclosure.

[0171] At step 702, the receiver 214 of the UE 200 receives downlink control information (DCI) in an active serving cell, which indicates a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission.

[0172] At step 704, the processor 202 of the UE 200 determines a first power headroom report (PHR) corresponding to the first waveform, and a second PHR corresponding to the second waveform.

[0173] At step 706, the transmitter 212 of the UE 200 transmits the first PHR and / or the second PHR for the active serving cell.

[0174] Figure 8 is a flowchart illustrating steps for receiving a PHR for supporting dynamic waveform switching of a gNB 300 according to some embodiments of the present disclosure.

[0175] At step 802, the transmitter 312 of the gNB 300 sends downlink control information (DCI) in the active serving cell, which indicates the first waveform or the second waveform for physical uplink shared channel (PUSCH) transmission.

[0176] At step 804, the receiver 314 of the gNB 300 receives a first power headroom report (PHR) corresponding to the first waveform and / or a second PHR corresponding to the second waveform for the active serving cell.

[0177] In one aspect, some items regarding a UE as an example of the present disclosure may be summarized as follows:

[0178] 1. A device comprising:

[0179] a receiver that receives downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for a physical uplink shared channel (PUSCH) transmission;

[0180] a processor that determines a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform, and

[0181] A transmitter that sends the first PHR and / or the second PHR for the active serving cell.

[0182] 2. An apparatus according to item 1, wherein, when the processor determines that there are one or more actual PUSCH transmissions having the first waveform that overlap in the time domain with the time slot in which the first PHR and / or the second PHR are sent, the first PHR is an actual PHR determined based on parameters of the earliest one of the actual PUSCH transmissions.

[0183] 3. An apparatus according to item 1, wherein, when the processor determines that there is no actual PUSCH transmission with the first waveform that overlaps with the time slot for sending the first PHR and / or the second PHR in the time domain, the first PHR is a virtual PHR determined based on a predefined set of parameters.

[0184] 4. An apparatus according to item 1, wherein, when the processor determines that there is no actual PUSCH transmission with the first waveform that overlaps with the time slot for sending the first PHR and / or the second PHR in the time domain, the first PHR is an actual PHR determined based on a predefined set of parameters.

[0185] 5. An apparatus according to item 3 or 4, wherein, when it is determined by the processor that there is at least one actual PUSCH transmission with the second waveform that overlaps with the time slot in which the first PHR and / or the second PHR is sent in the time domain, the predefined parameter set for determining the first PHR is derived by reinterpreting the parameters indicated for the actual PUSCH transmission of the second waveform based on the first waveform.

[0186] 6. The apparatus according to item 5, wherein the first waveform and the second waveform are selected from discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) and cyclic prefix orthogonal frequency division multiplexing (CP-OFDM), and the number of layers of PUSCH transmission is assumed to be 1 for calculating the parameters of the PHR corresponding to DFT-s-OFDM .

[0187] 7. An apparatus according to item 1, wherein the processor is configured to report only one PHR; and select one PHR from the first PHR and the second PHR for transmission corresponding to the earliest actual PUSCH transmission that overlaps with the time slot in which the first PHR and / or the second PHR is sent in the time domain.

[0188] 8. The apparatus according to item 1, wherein the first PHR and the second PHR are reported in one PHR Medium Access Control-Control Element (MAC-CE).

[0189] 9. The apparatus according to item 8, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to the waveform of the earliest actual PUSCH transmission overlapping with the time slot in which the first PHR and / or the second PHR is sent in the time domain.

[0190] 10. The apparatus according to item 8, wherein the PHR at the front position in the PHR MAC-CE corresponds to CP-OFDM, and the PHR at the subsequent position in the PHR MAC-CE corresponds to DFT-s-OFDM.

[0191] 11. The apparatus of item 1, wherein each of the first PHR and the second PHR is reported in a separate PHR MAC-CE.

[0192] 12. The apparatus according to item 11, wherein the PHR MAC-CE includes a field indicating a waveform corresponding to the PHR in the PHR MAC-CE.

[0193] 13. The apparatus according to item 1, wherein the receiver further receives radio resource control (RRC) signaling for configuring whether to report one PHR or multiple PHRs for different waveforms.

[0194] 14. The apparatus of clause 1, wherein the processor further determines a path loss (PL) variation for each of the waveforms, and the transmitter determines that the PL variation exceeds The first PHR and / or the second PHR are sent at the same time.

[0195] 15. An apparatus according to item 14, wherein the PL change of the waveform is determined based on a power headroom (PH) calculation for the waveform, the PL measured at the current time on a current path loss reference signal (PL-RS) and a PH calculation for the same waveform, the PL measured at the transmission time of the last transmission of the PHR on the PL-RS used at that time.

[0196] 16. The apparatus of item 1, wherein the processor further determines a path loss (PL) change, wherein the PL change is determined based on a PL measured at a current time on a current path loss reference signal (PL-RS) for the first PHR and a PL measured at a transmission time of a last transmission of a PHR on a then-used PL-RS for the first PHR, and upon determining that the PL change exceeds When the first PHR and / or the second PHR are sent by the transmitter.

[0197] On the other hand, some items about gNB as disclosed examples can be summarized as follows:

[0198] 17. An apparatus comprising:

[0199] a transmitter that transmits downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; and

[0200] A receiver that receives, for an active serving cell, a first power headroom report (PHR) corresponding to a first waveform and / or a second PHR corresponding to a second waveform.

[0201] 18. The apparatus of item 17, wherein the first waveform and the second waveform are selected from discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) and cyclic prefix orthogonal frequency division multiplexing (CP-OFDM).

[0202] 19. The apparatus according to item 17, wherein the first PHR and the second PHR are received in one PHR Medium Access Control-Control Element (MAC-CE).

[0203] 20. The apparatus according to item 19, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to the waveform of the earliest actual PUSCH transmission that overlaps with the time slot in which the first PHR and / or the second PHR is received in the time domain.

[0204] 21. The apparatus according to item 19, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to CP-OFDM, and the PHR at the subsequent position in the PHR MAC-CE corresponds to DFT-s-OFDM.

[0205] 22. The apparatus of item 17, wherein each of the first PHR and the second PHR is received in a separate PHR MAC-CE.

[0206] 23. The apparatus according to item 22, wherein the PHR MAC-CE includes a field indicating a waveform corresponding to the PHR in the PHR MAC-CE.

[0207] 24. The apparatus according to item 17, wherein the transmitter further sends radio resource control (RRC) signaling for configuring whether to report one PHR or multiple PHRs for different waveforms.

[0208] On the other hand, some items regarding a method of a UE as an example of the present disclosure may be summarized as follows:

[0209] 25. A method comprising:

[0210] receiving, by a receiver, downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for a physical uplink shared channel (PUSCH) transmission;

[0211] determining, by a processor, a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform; and

[0212] The first PHR and / or the second PHR are sent by a transmitter for the active serving cell.

[0213] 26. A method according to item 25, wherein, when the processor determines that there are one or more actual PUSCH transmissions having the first waveform that overlap in the time domain with the time slot in which the first PHR and / or the second PHR are sent, the first PHR is an actual PHR determined based on parameters of the earliest one of the actual PUSCH transmissions.

[0214] 27. A method according to item 25, wherein, when the processor determines that there is no actual PUSCH transmission with the first waveform that overlaps with the time slot for sending the first PHR and / or the second PHR in the time domain, the first PHR is a virtual PHR determined based on a predefined set of parameters.

[0215] 28. A method according to item 25, wherein, when the processor determines that there is no actual PUSCH transmission with the first waveform that overlaps with the time slot for sending the first PHR and / or the second PHR in the time domain, the first PHR is an actual PHR determined based on a predefined set of parameters.

[0216] 29. A method according to item 27 or 28, wherein, when it is determined by the processor that there is at least one actual PUSCH transmission with the second waveform that overlaps in the time domain with the time slot in which the first PHR and / or the second PHR is sent, the predefined parameter set for determining the first PHR is derived by reinterpreting the parameters indicated for the actual PUSCH transmission of the second waveform based on the first waveform.

[0217] 30. The method according to item 29, wherein the first waveform and the second waveform are selected from discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) and cyclic prefix orthogonal frequency division multiplexing (CP-OFDM), and the number of layers of PUSCH transmission is assumed to be 1 for calculating the parameters of the PHR corresponding to DFT-s-OFDM .

[0218] 31. A method according to item 25, wherein the processor is configured to report only one PHR; and select one PHR from the first PHR and the second PHR for transmission corresponding to the earliest actual PUSCH transmission that overlaps with the time slot in which the first PHR and / or the second PHR is sent in the time domain.

[0219] 32. The method of item 25, wherein the first PHR and the second PHR are reported in one PHR Medium Access Control-Control Element (MAC-CE).

[0220] 33. A method according to item 32, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to the waveform of the earliest actual PUSCH transmission that overlaps with the time slot in which the first PHR and / or the second PHR is sent in the time domain.

[0221] 34. The method according to item 32, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to CP-OFDM, and the PHR at the subsequent position in the PHR MAC-CE corresponds to DFT-s-OFDM.

[0222] 35. A method according to item 25, wherein each of the first PHR and the second PHR is reported in a separate PHRMAC-CE.

[0223] 36. A method according to item 35, wherein the PHR MAC-CE includes a field indicating a waveform corresponding to the PHR in the PHR MAC-CE.

[0224] 37. The method according to item 25, wherein the receiver further receives radio resource control (RRC) signaling for configuring whether to report one PHR or multiple PHRs for different waveforms.

[0225] 38. The method of clause 25, wherein the processor further determines a path loss (PL) variation for each of the waveforms, and the transmitter determines the PL variation for the first waveform, both waveforms, or any one of the waveforms. The first PHR and / or the second PHR are sent at the same time.

[0226] 39. A method according to item 38, wherein the PL change of the waveform is determined based on a power headroom (PH) calculation for the waveform of the PL measured at the current time on the current path loss reference signal (PL-RS) and a PH calculation for the same waveform of the PL measured at the transmission time of the last transmission of the PHR on the PL-RS used at that time.

[0227] 40. The method of item 25, wherein the processor further determines a path loss (PL) change, wherein the PL change is determined based on a PL measured at a current time on a current path loss reference signal (PL-RS) for the first PHR and a PL measured at a transmission time of a last transmission of a PHR on a then used PL-RS for the first PHR, and upon determining that the PL change exceeds When the first PHR and / or the second PHR are sent by the transmitter.

[0228] On the other hand, some items about the method of gNB as a disclosed example can be summarized as follows:

[0229] 41. A method comprising:

[0230] Sending, by a transmitter, downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for physical uplink shared channel (PUSCH) transmission; and

[0231] A first power headroom report (PHR) corresponding to a first waveform and / or a second PHR corresponding to a second waveform is received by a receiver for an active serving cell.

[0232] 42. The method of item 41, wherein the first and second waveforms are selected from discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) and cyclic prefix orthogonal frequency division multiplexing (CP-OFDM).

[0233] 43. A method according to item 41, wherein the first PHR and the second PHR are received in one PHR Medium Access Control-Control Element (MAC-CE).

[0234] 44. A method according to item 43, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to the waveform of the earliest actual PUSCH transmission that overlaps with the time slot in which the first PHR and / or the second PHR is received in the time domain.

[0235] 45. A method according to item 43, wherein the PHR at the frontmost position in the PHR MAC-CE corresponds to CP-OFDM, and the PHR at the subsequent position in the PHR MAC-CE corresponds to DFT-s-OFDM.

[0236] 46. ​​A method according to item 41, wherein each of the first PHR and the second PHR is received in a separate PHR MAC-CE.

[0237] 47. A method according to item 46, wherein the PHR MAC-CE includes a field indicating a waveform corresponding to the PHR in the PHR MAC-CE.

[0238] 48. The method according to item 41, wherein the transmitter also sends radio resource control (RRC) signaling for configuring whether to report one PHR or multiple PHRs for different waveforms.

[0239] Various embodiments and / or examples are disclosed to provide exemplary and explanatory information to enable those skilled in the art to put the present disclosure into practice. Unless otherwise explicitly stated, features or components disclosed with reference to one embodiment or example also apply to all embodiments or examples.

[0240] Embodiments may be practiced in other specific forms. The described embodiments should be considered in all respects as merely illustrative and not restrictive. Therefore, the scope is indicated by the appended claims rather than the foregoing description. All changes that fall within the equivalent meaning and range of the claims are included within their scope.

Claims

1. A device comprising: a receiver that receives downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for a physical uplink shared channel (PUSCH) transmission; a processor that determines a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform; as well as A transmitter that sends the first PHR and / or the second PHR for the active serving cell.

2. The device according to claim 1, wherein: When it is determined by the processor that there are one or more actual PUSCH transmissions having the first waveform that overlap in the time domain with the time slot in which the first PHR and / or the second PHR are transmitted, the first PHR is an actual PHR determined based on parameters of an earliest one of the actual PUSCH transmissions.

3. The device according to claim 1, wherein: When it is determined by the processor that there is no actual PUSCH transmission having the first waveform overlapping with a time slot in which the first PHR and / or the second PHR is transmitted in the time domain, the first PHR is a virtual PHR determined based on a predefined parameter set.

4. The device according to claim 1, wherein: When it is determined by the processor that there is no actual PUSCH transmission having the first waveform overlapping with a time slot in which the first PHR and / or the second PHR is transmitted in the time domain, the first PHR is an actual PHR determined based on a predefined parameter set.

5. The device according to claim 3 or 4, wherein: When it is determined by the processor that there is at least one actual PUSCH transmission with the second waveform that overlaps with the time slot in which the first PHR and / or the second PHR is transmitted in the time domain, the predefined parameter set for determining the first PHR is derived by reinterpreting the parameters indicated for the actual PUSCH transmission of the second waveform based on the first waveform.

6. The device according to claim 5, wherein: The first waveform and the second waveform are selected from discrete Fourier transform-spread-orthogonal frequency division multiplexing (DFT-s-OFDM) and cyclic prefix orthogonal frequency division multiplexing (CP-OFDM), and the number of layers of PUSCH transmission is assumed to be 1 for calculating the parameters of the PHR corresponding to DFT-s-OFDM .

7. The device according to claim 1, wherein: The processor is configured to report only one PHR; and select one PHR from the first PHR and the second PHR for transmission corresponding to the earliest actual PUSCH transmission overlapping with a time slot in which the first PHR and / or the second PHR is transmitted in the time domain.

8. The device according to claim 1, wherein: The first PHR and the second PHR are reported in one PHR Medium Access Control-Control Element (MAC-CE).

9. The device according to claim 8, wherein: The PHR at the front position in the PHR MAC-CE corresponds to the waveform of the earliest actual PUSCH transmission overlapping with the time slot in which the first PHR and / or the second PHR is transmitted in the time domain.

10. The device according to claim 8, wherein: The PHR at the foremost position in the PHR MAC-CE corresponds to CP-OFDM, and the PHR at the subsequent position in the PHR MAC-CE corresponds to DFT-s-OFDM.

11. The device according to claim 1, wherein: The processor further determines a path loss (PL) variation for each of the waveforms, and the transmitter determines that the PL variation exceeds The first PHR and / or the second PHR are transmitted at the same time.

12. The device according to claim 11, wherein The PL change of a waveform is determined based on a PL measured at a present time on a current path loss reference signal (PL-RS) for a power headroom (PH) calculation of the waveform and a PL measured at a transmission time of a last transmission of a PHR on the then used PL-RS for a PH calculation of the same waveform.

13. The device according to claim 1, wherein: The processor further determines a path loss (PL) change, wherein the PL change is determined based on a PL measured at a current time on a current path loss reference signal (PL-RS) for the first PHR and a PL measured at a transmission time of a last transmission of a PHR on a then-used PL-RS for the first PHR, the transmitter performing a The first PHR and / or the second PHR are sent at the same time.

14. An apparatus comprising: a transmitter that transmits downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for a physical uplink shared channel (PUSCH) transmission; as well as A receiver that receives, for the active serving cell, a first power headroom report (PHR) corresponding to the first waveform and / or a second PHR corresponding to the second waveform.

15. A method comprising: receiving, by a receiver, downlink control information (DCI) in an active serving cell, the DCI indicating a first waveform or a second waveform for a physical uplink shared channel (PUSCH) transmission; Determining, by a processor, a first power headroom report (PHR) corresponding to the first waveform and a second PHR corresponding to the second waveform; as well as The first PHR and / or the second PHR are sent by a transmitter for the active serving cell.

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