Patent Description:
The subject matter disclosed herein relates generally to wireless communications and more particularly relates to determining a power headroom report.

The following abbreviations are herewith defined, at least some of which are referred to within the following description: Third Generation Partnership Project ("3GPP"), <NUM>th Generation ("<NUM>"), Positive-Acknowledgment ("ACK"), Aggregation Level ("AL"), Access and Mobility Management Function ("AMF"), Access Point ("AP"), Beam Failure Detection ("BFD"), Binary Phase Shift Keying ("BPSK"), Base Station ("BS"), Buffer Status Report ("BSR"), Bandwidth ("BW"), Bandwidth Part ("BWP"), Cell RNTI ("C-RNTI"), Carrier Aggregation ("CA"), Contention-Based Random Access ("CBRA"), Clear Channel Assessment ("CCA"), Common Control Channel ("CCCH"), Control Channel Element ("CCE"), Cyclic Delay Diversity ("CDD"), Code Division Multiple Access ("CDMA"), Control Element ("CE"), Contention-Free Random Access ("CFRA"), Closed-Loop ("CL"), Coordinated Multipoint ("CoMP"), Channel Occupancy Time ("COT"), Cyclic Prefix ("CP"), Cyclical Redundancy Check ("CRC"), Channel State Information ("CSI"), Channel State Information-Reference Signal ("CSI-RS"), Common Search Space ("CSS"), Control Resource Set ("CORESET"), Discrete Fourier Transform Spread ("DFTS"), Downlink Control Information ("DCI"), Downlink ("DL"), Demodulation Reference Signal ("DMRS"), Data Radio Bearer ("DRB"), Discontinuous Reception ("DRX"), Downlink Pilot Time Slot ("DwPTS"), Enhanced Clear Channel Assessment ("eCCA"), Enhanced Mobile Broadband ("eMBB"), Evolved Node B ("eNB"), Effective Isotropic Radiated Power ("EIRP"), European Telecommunications Standards Institute ("ETSI"), Frame Based Equipment ("FBE"), Frequency Division Duplex ("FDD"), Frequency Division Multiplexing ("FDM"), Frequency Division Multiple Access ("FDMA"), Frequency Division Orthogonal Cover Code ("FD-OCC"), 5GNode B or Next Generation Node B ("gNB"), General Packet Radio Services ("GPRS"), Guard Period ("GP"), Global System for Mobile Communications ("GSM"), Globally Unique Temporary UE Identifier ("GUTI"), Home AMF ("hAMF"), Hybrid Automatic Repeat Request ("HARQ"), Home Location Register ("HLR"), Handover ("HO"), Home PLMN ("HPLMN"), Home Subscriber Server ("HSS"), Identity or Identifier ("ID"), Information Element ("IE"), International Mobile Equipment Identity ("IMEI"), International Mobile Subscriber Identity ("IMSI"), International Mobile Telecommunications ("IMT"), Internet-of-Things ("IoT"), Layer <NUM> ("L2"), Licensed Assisted Access ("LAA"), Load Based Equipment ("LBE"), Listen-Before-Talk ("LBT"), Logical Channel ("LCH"), Logical Channel Prioritization ("LCP"), Log-Likelihood Ratio ("LLR"), Long Term Evolution ("LTE"), Multiple Access ("MA"), Medium Access Control ("MAC"), Multimedia Broadcast Multicast Services ("MBMS"), Modulation Coding Scheme ("MCS"), Master Information Block ("MIB"), Multiple Input Multiple Output ("MIMO"), Mobility Management ("MM"), Mobility Management Entity ("MME"), Mobile Network Operator ("MNO"), massive MTC ("mMTC"), Maximum Power Reduction ("MPR"), Machine Type Communication ("MTC"), Multi User Shared Access ("MUSA"), Non Access Stratum ("NAS"), Narrowband ("IVB"), Negative-Acknowledgment ("NACK") or ("NAK"), Network Entity ("NE"), Network Function ("NF"), Non-Orthogonal Multiple Access ("NOMA"), New Radio ("NR"), NR Unlicensed ("NR-U"), Network Repository Function ("NRF"), Network Slice Instance ("NSI"), Network Slice Selection Assistance Information ("IVSSAI"), Network Slice Selection Function ("IVSSF"), Network Slice Selection Policy ("NSSP"), Operation and Maintenance System ("OAM"), Orthogonal Frequency Division Multiplexing ("OFDM"), Open-Loop ("OL"), Other System Information ("OSI"), Power Angular Spectrum ("PAS"), Physical Broadcast Channel ("PBCH"), Power Control ("PC"), Primary Cell ("PCell"), Policy Control Function ("PCF"), Physical Cell ID ("PCID"), Physical Downlink Control Channel ("PDCCH"), Packet Data Convergence Protocol ("PDCP"), Packet Data Network Gateway ("PGW"), Physical Downlink Shared Channel ("PDSCH"), Pattern Division Multiple Access ("PDMA"), Packet Data Unit ("PDU"), Physical Hybrid ARQ Indicator Channel ("PHICH"), Power Headroom ("PH"), Power Headroom Report ("PHR"), Physical Layer ("PHY"), Public Land Mobile Network ("PLMN"), Physical Random Access Channel ("PRACH"), Physical Resource Block ("PRB"), Primary Secondary Cell ("PSCell"), Physical Uplink Control Channel ("PUCCH"), Physical Uplink Shared Channel ("PUSCH"), Quasi Co-Located ("QCL"), Quality of Service ("QoS"), Quadrature Phase Shift Keying ("QPSK"), Registration Area ("RA"), RA RNTI ("RA-RNTI"), Radio Access Network ("RAN"), Radio Access Technology ("RAT"), Random Access Procedure ("RACH"), Random Access Preamble Identifier ("RAPID"), Random Access Response ("RAR"), Resource Element Group ("REG"), Radio Link Control ("RLC"), RLC Acknowledged Mode ("RLC-AM"), RLC Unacknowledged Mode/Transparent Mode ("RLC-UM/TM"), Radio Link Monitoring ("RLM"), Radio Network Temporary Identifier ("RNTI"), Reference Signal ("RS"), Remaining Minimum System Information ("RMSI"), Radio Resource Control ("RRC"), Radio Resource Management ("RRM"), Resource Spread Multiple Access ("RSMA"), Reference Signal Received Power ("RSRP"), Round Trip Time ("RTT"), Receive ("RX"), Sparse Code Multiple Access ("SCMA"), Scheduling Request ("SR"), Sounding Reference Signal ("SRS"), Single Carrier Frequency Division Multiple Access ("SC-FDMA"), Secondary Cell ("SCell"), Shared Channel ("SCH"), Sub-carrier Spacing ("SCS"), Service Data Unit ("SDU"), Serving Gateway ("SGW"), System Information Block ("SIB"), SystemInformationBlockType1 ("SIB1"), SystemInformationBlockType2 ("SIB2"), Subscriber Identity/Identification Module ("SIM"), Signal-to-Interference-Plus-Noise Ratio ("SINR"), Service Level Agreement ("SLA"), Session Management Function ("SMF"), Special Cell ("SpCell"), Single Network Slice Selection Assistance Information ("S-NSSAI"), Signaling Radio Bearer ("SRB"), Shortened TTI ("sTTI"), Synchronization Signal ("SS"), Synchronization Signal Block ("SSB"), Supplementary Uplink ("SUL"), Subscriber Permanent Identifier ("SUPI"), Timing Advance ("TA"), Timing Alignment Timer ("TAT"), Transport Block ("TB"), Transport Block Size ("TBS"), Time-Division Duplex ("TDD"), Time Division Multiplex ("TDM"), Time Division Orthogonal Cover Code ("TD-OCC"), Transmission Power Control ("TPC"), Transmission Reception Point ("TRP"), Transmission Time Interval ("TTI"), Transmit ("TX"), Uplink Control Information ("UCI"), Unified Data Management Function ("UDM"), Unified Data Repository ("UDR"), User Entity/Equipment (Mobile Terminal) ("UE"), Uplink ("UL"), UL SCH ("UL-SCH"), Universal Mobile Telecommunications System ("UMTS"), User Plane ("UP"), UP Function ("UPF"), Uplink Pilot Time Slot ("UpPTS"), Ultra-reliability and Low-latency Communications ("URLLC"), UE Route Selection Policy ("URSP"), Visiting AMF ("vAMF"), Visiting NSSF ("vNSSF"), Visiting PLMN ("VPLMN"), and Worldwide Interoperability for Microwave Access ("WiMAX").

In certain wireless communications networks, a power headroom report may be generated. In such networks, various factors may be used for generating the power headroom report.

<NPL>, and discusses that configured grants are considered for PHR reporting. <NPL>, and discusses the possibility of sending PHR via configured grant as well as dynamic grant with DCI. <NPL>, and discusses replacing implicit semi-static enabling of capability <NUM> with corresponding new RRC parameters for explicit capability signaling for both uplink and downlink.

Claim <NUM> defines a method relating to determining and transmitting a power headroom report. Claim <NUM> defines an apparatus relating to determining and transmitting a power headroom report. In the following, any method and/or apparatus referred to as embodiments but nevertheless do not fall within the scope of the appended claims are to be understood as examples helpful in understanding the invention.

<FIG> depicts an embodiment of a wireless communication system <NUM> for determining a power headroom report. In one embodiment, the wireless communication system <NUM> includes remote units <NUM> and network units <NUM>. Even though a specific number of remote units <NUM> and network units <NUM> are depicted in <FIG>, one of skill in the art will recognize that any number of remote units <NUM> and network units <NUM> may be included in the wireless communication system <NUM>.

In one embodiment, the remote units <NUM> may include computing devices, such as desktop computers, laptop computers, personal digital assistants ("PDAs"), tablet computers, smart phones, smart televisions (e.g., televisions connected to the Internet), set-top boxes, game consoles, security systems (including security cameras), vehicle on-board computers, network devices (e.g., routers, switches, modems), aerial vehicles, drones, or the like. The remote units <NUM> may communicate directly with one or more of the network units <NUM> via UL communication signals.

In one embodiment, a remote unit <NUM> may determine a power headroom report for transmission on a physical uplink shared channel resource corresponding to a configured grant. In some embodiments, the remote unit <NUM> may transmit the power headroom report on the physical uplink shared channel resource, wherein: determining the power headroom report comprises determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant. Accordingly, the remote unit <NUM> may be used for determining a power headroom report.

In certain embodiments, a network unit <NUM> may receive a power headroom report on the physical uplink shared channel resource corresponding to a configured grant, wherein: the power headroom report is determined based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant. Accordingly, the network unit <NUM> may be used for receiving a power headroom report.

<FIG> depicts one embodiment of an apparatus <NUM> that may be used for determining a power headroom report. The apparatus <NUM> includes one embodiment of the remote unit <NUM>. Furthermore, the remote unit <NUM> may include a processor <NUM>, a memory <NUM>, an input device <NUM>, a display <NUM>, a transmitter <NUM>, and a receiver <NUM>. In some embodiments, the input device <NUM> and the display <NUM> are combined into a single device, such as a touchscreen. In certain embodiments, the remote unit <NUM> may not include any input device <NUM> and/or display <NUM>. In various embodiments, the remote unit <NUM> may include one or more of the processor <NUM>, the memory <NUM>, the transmitter <NUM>, and the receiver <NUM>, and may not include the input device <NUM> and/or the display <NUM>.

In various embodiments, the processor <NUM> may determine a power headroom report for transmission on a physical uplink shared channel resource corresponding to a configured grant.

The transmitter <NUM> is used to provide UL communication signals to the network unit <NUM> and the receiver <NUM> is used to receive DL communication signals from the network unit <NUM>, as described herein.

In some embodiments, the transmitter <NUM> transmits a power headroom report on a physical uplink shared channel resource, wherein: the processor <NUM> determining the power headroom report comprises the processor <NUM> determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

<FIG> depicts one embodiment of an apparatus <NUM> that may be used for receiving a power headroom report. The apparatus <NUM> includes one embodiment of the network unit <NUM>. Furthermore, the network unit <NUM> may include a processor <NUM>, a memory <NUM>, an input device <NUM>, a display <NUM>, a transmitter <NUM>, and a receiver <NUM>. As may be appreciated, the processor <NUM>, the memory <NUM>, the input device <NUM>, the display <NUM>, the transmitter <NUM>, and the receiver <NUM> may be substantially similar to the processor <NUM>, the memory <NUM>, the input device <NUM>, the display <NUM>, the transmitter <NUM>, and the receiver <NUM> of the remote unit <NUM>, respectively.

In various embodiments, the receiver <NUM> receives a power headroom report on the physical uplink shared channel resource corresponding to a configured grant, wherein: the power headroom report is determined based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant. Although only one transmitter <NUM> and one receiver <NUM> are illustrated, the network unit <NUM> may have any suitable number of transmitters <NUM> and receivers <NUM>.

In certain configurations, to support various requirements of different services, such as eMBB, URLLC, and mMTC, different OFDM numerologies may be supported (e.g., SCS, CP length) in a single framework. Furthermore, in some configurations, diverse requirements in terms of data rates, latency, and coverage may be supported. For example, eMBB may support peak data rates (e.g., <NUM> Gbps for downlink and <NUM> Gbps for uplink) and user-experienced data rates in the order of three times what is supported in other configurations. As another example, for URLLC, tighter requirements may be put on ultra-low latency (e.g., <NUM> for UL and DL each for user plane latency) and high reliability (e.g., <NUM>-<NUM>-<NUM> within <NUM>). In another example, mMTC may use a high connection density, large coverage in harsh environments, and/or extremely long-life battery for low cost devices. Therefore, an OFDM numerology (e.g., subcarrier spacing, OFDM symbol duration, CP duration, number of symbols per scheduling interval) that is suitable for one configuration might not work well for another. For example, low-latency services may have a shorter symbol duration (e.g., larger subcarrier spacing) and/or fewer symbols per scheduling interval (e.g., TTI/slot) than an mMTC service. Furthermore, deployment scenarios with large channel delay spreads may use a longer CP duration than scenarios with short delay spreads. In various configurations, the subcarrier spacing may be optimized to retain a similar CP overhead. In some configurations, different numerologies may be applied across different carriers for a given UE as well as different numerologies within the same carrier for a given UE (e.g., different OFDM numerologies may be multiplexed in a frequency-domain and/or a time-domain within the same carrier such as in the context of multiple different BWPs or across different carriers). This may benefit simultaneous support of services with vastly different requirements (e.g., ultra-low latency communications (short symbols and thus wide subcarrier spacing) and MBMS services (long symbols to enable long or extended cyclic prefix and thus narrow subcarrier spacing).

In some configurations, e.g., in a mobile communication system based on LTE protocols, a TTI and a subframe both correspond to the same time duration of <NUM>. Both may refer to a <NUM> period associated to different physical channels including a shortest possible interval between two PDCCH occasions, a duration of a transmission of a transport block on PDSCH or PUSCH, and/or a time-domain scheduling granularity. In various configurations, e.g., in a mobile communication system based on the NR protocols, a PDSCH or PUSCH duration for a transmission of a transport block may vary between a mini-slot, a slot, and/or multiple slots. Furthermore, in such configurations, the location of a PUSCH transmission within a slot may vary in terms of a position of a starting OFDM symbol (e.g., front-loaded PUSCH transmission such as PUSCH mapping Type A, or non-front-loaded PUSCH transmission such as PUSCH mapping Type B). In certain configurations, a UE may be configured to monitor a DL control channel in terms of slot or OFDM symbol with respect to a numerology of the DL control channel. Therefore, the UE may be configured to monitor the PDCCH on PDCCH monitoring occasions once every number of slots (e.g., on a subset of PDCCH monitoring candidates).

As used herein, TTI may refer to a time period (e.g., one or more OFDM symbols) for which a UE is configured to monitor a downlink control channel and/or a PDCCH (e.g., on a specific CORESET) as well as a duration of a data transmission on PDSCH and/or PUSCH.

In various configurations, for aggregating multiple serving cells and/or component carriers with different numerologies (e.g., NR CA), a PHR reporting functionality may consider possible different timings of aggregated component carriers and/or cells.

In certain configurations, to support different numerologies, one slot of a component carrier and/or serving cell may overlap with multiple slots of another carrier (e.g., eMBB on one carrier and URLLC on another carrier). In some configurations, a relative timing (e.g., time period) between PDCCH (DCI) and a corresponding PUSCH allocation may vary dynamically (e.g., may be indicated within an UL grant (DCI)).

In various configurations, power headroom reporting in NR CA may have complications related to a size of an extended PHR MAC CE. In some configurations, because of a very high data rate and/or low latency, a processing time available for both a transmitter and a receiver may be limited (e.g., for generating and/or decoding a TB). Therefore, in such embodiments, L2 protocol functions may be performed in a processing-power-friendly way. In certain configurations, no concatenation is supported in an RLC layer. Not supporting concatenation in the RLC layer may enable pre-processing of both an RLC layer and a MAC layer before receiving an UL grant (e.g., a PDCP SDU may be pre-constructed to a MAC SDU with its own MAC sub-header). In some embodiments, UL MAC CEs may be placed at an end of the TB before any potential padding. This may enable a transmitter to immediately start feeding part of the TB to a PHY as soon as an UL grant is received. If the MAC CE is placed at the beginning of the TB, the transmitter may need to wait until the MAC CE content is generated before channel coding can start. In certain embodiments, computation of a BSR and/or PHR MAC CE may be done at a later point of time because both reflect a latest status before transmission (e.g., BSR may be only calculate after LCP has been finalized).

In various embodiments, because a size of an extended PHR MAC CE is not fixed but depends on a number of activated serving cells and/or component carriers and on whether virtual or real PH is reported for a serving cell (e.g., since Pcmax,c is not reported for a virtual PHR), generation of a TB from a processing timing perspective may be more challenging if an extended PHR MAC CE is multiplexed in a TB. In certain embodiments, if generating a TB (e.g., during LCP), because MAC CEs are generally prioritized over data channels, a UE may first reserve sufficient space within a TB for MAC CEs before assigning data to the logical channels (e.g., DRBs). However, if the size of a MAC CE is only known at a late point of time, the LCP procedure may be delayed. In some embodiments, to decide a size of an extended PHR MAC CE for NR CA (e.g., if a UE is aggregating multiple serving cells with different numerologies and/or slot lengths), a UE may determine whether a virtual uplink transmission or a real uplink transmission takes place on the serving cells in a slot for which PHR is reported. However, if different numerologies with different slot length and/or timing relations are used on the serving cells, the UE may not know immediately (e.g., upon having received an UL grant), whether PH information for other serving cells is calculated based on actual or virtual uplink transmission.

In some embodiments, because a UE may determine a PHR MAC CE size before starting LCP and a size of PHR MAC CE may depend on whether virtual of real PH is reported for a serving cell, UE may determine whether actual or virtual PHR is reported for a serving based on UL resource allocation related signaling (e.g., DCI, configured grant allocations, etc.) that has been received up until a first UL grant is received since PHR has been triggered. In certain embodiments, a first UL resource (e.g., for a new transmission) after a PHR has been triggered may be a configured grant (e.g., type <NUM> or type <NUM>) and there may be no dynamic UL grant received between PHR triggering and the configured grant.

<FIG> is a diagram illustrating one embodiment of UL resource scheduling <NUM>. A timing diagram is illustrated for a first cell <NUM> and a second cell <NUM>. In the timing diagram for the first cell <NUM>, a PHR is triggered at a first time <NUM>, and at a second time <NUM>, a configured grant ("CG") type <NUM> is provided for UL CG resources <NUM>. In the timing diagram for the second cell <NUM>, at a first time <NUM>, DCI (e.g., UL grant) is received that allocates UL resources <NUM>.

In various configurations, a PHR MAC CE is transmitted on a configured grant resource. Thus, the timing for determining actual vs. virtual PHR is done by considering UL scheduling related signaling received until the starting symbol of a PUSCH transmission containing the PHR MAC CE minus some predefined offset (e.g., PUSCH processing time).

In some embodiments, a timing for determining actual vs. virtual PHR is as follows: a MAC entity determines whether a PH value for an activated serving cell is based on real transmission or a reference format by considering configured grants and downlink control information that has been received until and including a PDCCH occasion in which a first UL grant for a new transmission is received since a PHR has been triggered if the PHR MAC CE is reported on an uplink grant received on the PDCCH or until the first uplink symbol of PUSCH transmission minus a PUSCH processing time (e.g., as defined in Section <NUM> of <NUM>) if the PHR MAC CE is reported on a configured grant.

A PUSCH preparation and/or processing procedure time may be defined as shown in Table <NUM>.

In various embodiments, a PUSCH processing and/or preparation time may be only defined for a dynamic grant and not for the case in which a PHR MAC CE is transmitted on a configured grant resource (e.g., there is no PUSCH processing and/or preparation timing defined for a configured grant).

As used herein, eNB and/or gNB may be used for a base station but may be replaceable by any other radio access node (e.g., BS, eNB, gNB, AP, NR, etc.). Moreover, methods and devices described herein may be applicable to IEEE <NUM> variants, GSM, GPRS, UMTS, LTE variants, CDMA2000, Bluetooth, ZigBee, Sigfoxx, and so forth. Furthermore, methods and devices described herein may be applicable to a next generation mobile network in which an MME maps to an AMF and an SMF, an HSS maps to a UDM and/or UDR, and/or an SGW and/or a PGW map to a UPF.

In a first embodiment, a MAC entity may determine whether to report actual or virtual PHR for a serving cell at a latest possible timing and/or PDCCH occasion before a configured grant resource carrying a PHR MAC CE in which a hypothetical dynamic grant (e.g., DCI) may override the configured grant allocation. In some embodiments, Tproc,<NUM> = max ((N<NUM> + d<NUM>,<NUM>)(<NUM> +<NUM>)·κ<NUM>-µ·Tc,d<NUM>,<NUM>), with all parameters as defined herein, defines a minimum time between a PDCCH carrying DCI scheduling a PUSCH and the PUSCH resource (e.g., a minimum time a UE needs for preparation and/or transmission of a corresponding transport block). In various embodiments, a UE MAC may determine whether a PH value for an activated serving cell is based on a real transmission or a reference format by considering configured grants and downlink control information that has been received up until a first uplink symbol of the PUSCH transmission minus Tproc,<NUM> if the PHR MAC CE is reported on a configured grant. For the calculation of Tproc,<NUM> , a UE may need to know an N<NUM> value that depends on numerologies used for DL and UL channel, carrier, and/or BWP. In such embodiments, a numerology and/or SCS of the uplink channel with which the PUSCH (e.g., configured grant resource) is to be transmitted µUL may be known (e.g., from the semi-static configuration of the UL numerology/SCS of the UL BWP on which the configured grant resources are configured), however, µDL, the subcarrier spacing of the downlink with which the PDCCH carrying the DCI scheduling the PUSCH was transmitted, is not known (e.g. since there is no DCI for a configured grant). In one embodiment, µDL is set to a highest subcarrier spacing value µ among potential configured subcarrier spacings used for a hypothetical PDCCH carrying an DCI overriding a configured grant resource (e.g., configured grant resource on which PHR MAC CE is transmitted). The term overriding DCI may refer to a PDCCH carrying an UL DCI assigning PUSCH resources for a PUSCH duration (e.g., time allocation) that overlaps with the PUSCH duration (e.g., time allocation) of the configured uplink grant. In certain embodiments, a UE may check which subcarrier spacing (e.g., µ value) may be used for an overriding DCI (e.g., check which cell(s)/BWP(s) may be used for the transmission of an overriding DCI, and select the subcarrier spacing value µ as µDL that corresponds to a smallest Tproc,<NUM> value). Selecting a subcarrier spacing value as µDL that corresponds to the smallest Tproc,<NUM> may ensure that the UE determines the PHR value (e.g., actual vs. virtual PHR) at a latest point of time before a configured grant in which an overriding DCI may occur. In one example, only DL numerologies/SCSs are considered that are configured for all configured DL BWPs of a serving cell on which UL configured grant resources are configured on. In another example, all DL numerologies/SCSs of all different DL BWPs of all serving cells are considered (e.g., motivated by cross-carrier scheduling). A determined µDL may be used for the calculation of Tproc,<NUM>.

In some embodiments, d<NUM>,<NUM> is set to zero for the calculation of Tproc,<NUM> (e.g., assuming that an overriding DCI doesn't switch an UL BWP). In various embodiments, d<NUM>,<NUM> is set to a smallest and/or largest switching time configured for the configured UL BWPs of a serving cell (e.g., assuming that the UL BWP is switched). In certain embodiments, d<NUM>,<NUM> is set to a switching time corresponding to an UL BWP switch from a predetermined UL BWP to the UL BWP on which the UL configured resources are configured. In such embodiments, the predetermined UL BWP may be: (i) an initial UL BWP; (ii) a first active UL BWP; and/or (iii) the UL BWP with a lowest and/or highest BWP index. In some embodiments, d<NUM>,<NUM> is set to zero if a predetermined UL BWP is the same as an UL BWP on which UL configured resources are configured.

In various embodiments, a UE only considers µUL for the calculation of Tproc,<NUM>, e.g., µDL is discarded for the calculation of Tproc,<NUM> formula. In such embodiment, the subcarrier spacing for determining N<NUM> (e.g., PUSCH preparation time) is the subcarrier spacing of an uplink channel with which a PUSCH (e.g., configured grant resource) is to be transmitted. Accordingly, Tproc,<NUM> may be calculated by setting µ to µUL.

In certain embodiments, µDL may be set to a predefined value for calculation of Tproc,<NUM>. In various embodiment, there may be at least the following options for defining µDL for calculation of Tproc,<NUM> if the PHR MAC CE is transmitted on a configured grant: a) a highest subcarrier spacing (µ) among all DL subcarrier spacings configured for the UE (e.g., subcarrier spacings associated with the configured DL BWPs of the aggregated serving cells; b) a subcarrier spacing (µ) of the DL BWP with a same index as the UL BWP on which the configured grant is allocated; c) a highest subcarrier spacing (µ) of the configured DL BWPs of the serving cell on which the configured UL resource is allocated; d) µDL is set to a fixed value (e.g., µDL=<NUM> for PUSCH timing capability <NUM> and µDL=<NUM> for PUSCH timing capability <NUM>); e) µDL is set to zero; f): a lowest subcarrier spacing (µ value) of the configured DL BWPs of the serving cell on which the configured UL resource is allocated. Setting µDL to the lowest subcarrier spacing (µ) among the configured DL BWPs allows for the largest processing time Tproc,<NUM>; g) a subcarrier spacing (µ) of the configured DL BWP(s) of the serving cell on which the configured UL resource is allocated that corresponds to the largest Tproc,<NUM> value; h) a lowest subcarrier spacing (µ) among all DL subcarrier spacings configured for the UE (e.g., subcarrier spacings associated with the configured DL BWPs of the aggregated serving cells; i) a subcarrier spacing (µ) of the DL BWP that is paired, if present, with the UL BWP in which the configured grant is allocated; j) a subcarrier spacing (µ) of the initial DL BWP; k) a subcarrier spacing (µ) of the default DL BWP; l) a subcarrier spacing (µ) of the first active DL BWP; m) a subcarrier spacing (µ) of the current active DL BWP; n) a highest and/or lowest subcarrier spacing (µ) among the values described in options (b), (g), (h), (i), (j), (k), (l), (m), or a subset; and/or o) a semi-statically, dynamically, and/or semi-dynamically indicated DL subcarrier spacing (µ) (e.g., an extra RRC parameter in the configuration of the UL configured grant resources or an extra field in the activation DCI for UL configured grant resources (type <NUM>) that indicates what DL subcarrier spacing (µ) to use in the Tproc,<NUM> formula).

In some embodiments, a UE/MAC may determine whether actual or virtual PHR is reported for a serving cell by considering configured grants and downlink control information that has been received up until a first uplink symbol of a PUSCH transmission minus a time offset given by a slot offset K<NUM> and a start and length indicator SLIV of the DCI that activated the configured grant if PHR MAC CE is transmitted on a configured grant type <NUM>.

In certain embodiments, there may be two types of transmission without dynamic grant: configured grant Type <NUM> in which an uplink grant is provided by RRC and stored as a configured uplink grant; and configured grant Type <NUM> in which an uplink grant is provided by PDCCH and stored or cleared as a configured uplink grant based on L1 signaling indicating configured uplink grant activation or deactivation.

In various embodiments, Type <NUM> and Type <NUM> transmissions are configured by RRC per serving cell and per BWP. For Type <NUM>, activation and deactivation may be independent among the serving cells. The DCI activating a configured grant may be stored and may reoccur with a configured periodicity (e.g., RRC configured). Each configured grant resource may be assumed to have a corresponding DCI that is used as a reference time point for determining actual versus virtual PHR.

In some embodiments, a MAC determines whether a PH value for an activated serving cell is based on a real transmission or a reference format by considering configured grants and downlink control information that has been received up until and including a PDCCH occasion in which DCI associated with the configured grant (e.g., reoccurring activation DCI) is received if the PHR MAC CE is reported on a configured grant type <NUM>. In various embodiments, a UE/MAC uses DCI used for activation of a configured grant (e.g., Type <NUM>) for calculation of Tproc,<NUM>. In such embodiments, the MAC determines whether the PH value for an activated serving cell is based on a real transmission or a reference format by considering configured grants and downlink control information that has been received up until a first uplink symbol of a PUSCH transmission minus Tproc,<NUM> - calculated based on the activation DCI - if the PHR MAC CE is reported on a configured grant type <NUM>. In one example, a d<NUM>,<NUM> value (e.g., for whether an UL BWP switching is needed or not) that is determined based on the activation DCI for the first instance of the UL configured grant Type-<NUM> resources are re-used for all repetitions and/or reoccurrences of that UL configured grant Type-<NUM>.

In certain embodiments, a UE MAC entity determines whether a PH value for an activated serving cell is based on a real transmission or a reference format by considering configured grants and downlink control information that has been received up until and including a PDCCH occasion in which a first UL grant for a new transmission is received since a PHR has been triggered or by considering the configured grants and downlink control information that has been received until the first uplink symbol of PUSCH transmission minus some predefined time (e.g., TProc,<NUM>), whichever comes first. If a DCI for a new transmission is received earlier than the first uplink symbol of the PUSCH transmission (e.g., where PHR MAC CE is transmitted) minus some predefined time (e.g., Tproc,<NUM>) the MAC determines actual vs. virtual PHR based on the UL resource related control signaling (e.g., configured grant allocations, DCI, MAC CE etc.) that is received up until and including the PDCCH occasion in which the DCI (e.g., UL grant) is received.

In various embodiments, a UE/MAC determines whether a PH value for an activated serving cell is based on a real transmission or a reference format by considering configured grants and UL scheduling related downlink control information that has been received up until and including a PDCCH occasion in which a first UL grant for a new transmission is received since a PHR has been triggered if the UE has received an UL DCI for a new transmission between the PHR triggering instance and the PUSCH carrying the PHR MAC CE, and the PDCCH occasion of the first received UL grant for a new transmission after PHR has been triggered is not later than Tproc,<NUM> (symbols) before the first uplink symbol of the PUSCH transmission carrying the PHR MAC CE; otherwise, the MAC determines whether the PH value for an activated serving cell is based on a real transmission or a reference format by considering the configured grants and UL scheduling related downlink control information that has been received up until the first uplink symbol of PUSCH transmission minus the PUSCH processing time if the PHR MAC CE is reported on a configured grant.

<FIG> is a flow chart diagram illustrating one embodiment of a method <NUM> for determining a power headroom report. In some embodiments, the method <NUM> is performed by an apparatus, such as the remote unit <NUM>. In certain embodiments, the method <NUM> may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.

The method <NUM> may include determining <NUM> a power headroom report for transmission on a physical uplink shared channel resource corresponding to a configured grant. In some embodiments, the method <NUM> includes transmitting <NUM> the power headroom report on the physical uplink shared channel resource, wherein: determining the power headroom report comprises determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

In certain embodiments, the signaling for the configured grants comprises signaling for the configured grant associated with the physical uplink shared channel resource on which the power headroom report is transmitted. In some embodiments, the predetermined time is a physical uplink shared channel preparation procedure time determined (Tproc,<NUM>) for the configured grant. In various embodiments, the first parameter set to zero corresponds to a switching time (d<NUM>,<NUM>) used for calculation of the physical uplink shared channel preparation procedure time of the configured grant.

In one embodiment, the subcarrier spacing of the active downlink bandwidth part of the scheduling cell for the configured grant is used as a downlink subcarrier spacing µDL for calculation of the physical uplink shared channel preparation procedure time of the configured grant. In certain embodiments, a medium access control entity determines the power headroom report. In some embodiments, the predetermined time is computed based on a second parameter set to one.

In various embodiments, the predetermined time is computed based on a third parameter corresponding to a look-up table. In one embodiment, the subcarrier spacing of the active downlink bandwidth part of the scheduling cell for the configured grant is used to determine the third parameter from the look-up table.

<FIG> is a flow chart diagram illustrating another embodiment of a method <NUM> for determining a power headroom report. In some embodiments, the method <NUM> is performed by an apparatus, such as the network unit <NUM>. In certain embodiments, the method <NUM> may be performed by a processor executing program code, for example, a microcontroller, a microprocessor, a CPU, a GPU, an auxiliary processing unit, a FPGA, or the like.

The method <NUM> may include receiving <NUM> a power headroom report on the physical uplink shared channel resource corresponding to a configured grant, wherein: the power headroom report is determined based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

In certain embodiments, the signaling for the configured grants comprises signaling for the configured grant associated with the physical uplink shared channel resource on which the power headroom report is received. In some embodiments, the predetermined time is a physical uplink shared channel preparation procedure time (Tproc,<NUM>) determined for the configured grant. In various embodiments, the first parameter set to zero corresponds to a switching time (d<NUM>,<NUM>) used for calculation of the physical uplink shared channel preparation procedure time of the configured grant.

In one embodiment, a method comprises: determining a power headroom report for transmission on a physical uplink shared channel resource corresponding to a configured grant; and transmitting the power headroom report on the physical uplink shared channel resource, wherein: determining the power headroom report comprises determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

In certain embodiments, the signaling for the configured grants comprises signaling for the configured grant associated with the physical uplink shared channel resource on which the power headroom report is transmitted.

In some embodiments, the predetermined time is a physical uplink shared channel preparation procedure time determined (Tproc,<NUM>) for the configured grant.

In various embodiments, the first parameter set to zero corresponds to a switching time (d<NUM>,<NUM>) used for calculation of the physical uplink shared channel preparation procedure time of the configured grant.

In one embodiment, the subcarrier spacing of the active downlink bandwidth part of the scheduling cell for the configured grant is used as a downlink subcarrier spacing µDL for calculation of the physical uplink shared channel preparation procedure time of the configured grant.

In certain embodiments, a medium access control entity determines the power headroom report.

In some embodiments, the predetermined time is computed based on a second parameter set to one.

In various embodiments, the predetermined time is computed based on a third parameter corresponding to a look-up table.

In one embodiment, the subcarrier spacing of the active downlink bandwidth part of the scheduling cell for the configured grant is used to determine the third parameter from the look-up table.

In one embodiment, an apparatus comprises: a processor that determines a power headroom report for transmission on a physical uplink shared channel resource corresponding to a configured grant; and a transmitter that transmits the power headroom report on the physical uplink shared channel resource, wherein: the processor determining the power headroom report comprises the processor determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

In some embodiments, the predetermined time is a physical uplink shared channel preparation procedure time (Tproc,<NUM>) determined for the configured grant.

In one embodiment, a method comprises: receiving a power headroom report on the physical uplink shared channel resource corresponding to a configured grant, wherein: the power headroom report is determined based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

In certain embodiments, the signaling for the configured grants comprises signaling for the configured grant associated with the physical uplink shared channel resource on which the power headroom report is received.

In one embodiment, an apparatus comprises: a receiver that receives a power headroom report on the physical uplink shared channel resource corresponding to a configured grant, wherein: the power headroom report is determined based on a real transmission or a reference format based on signaling for configured grants and downlink control information received up until a predetermined time before a first uplink symbol of the physical uplink shared channel resource; and the predetermined time is computed based on: a first parameter set to zero; and a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant.

Claim 1:
A method (<NUM>) comprising:
determining (<NUM>) a power headroom report for transmission on a physical uplink shared channel resource corresponding to a configured grant; and
transmitting (<NUM>) the power headroom report on the physical uplink shared channel resource, wherein:
determining the power headroom report (<NUM>) for an activated serving cell comprises determining whether the power headroom report is based on a real transmission or a reference format based on signaling for configured grants and downlink control information received until a predetermined time before a first uplink symbol of the physical uplink shared channel resource, wherein the predetermined time is a physical uplink shared channel processing time for the configured grant; and
the predetermined time is computed based on:
a first parameter set to zero; and
a subcarrier spacing of an active downlink bandwidth part of a scheduling cell for the configured grant;
wherein the predetermined time is a physical uplink shared channel preparation procedure time determined, Tproc,<NUM>, for the configured grant;
wherein the first parameter set to zero corresponds to a switching time, d<NUM>,<NUM>, used for calculation of the physical uplink shared channel preparation procedure time of the configured grant; and
wherein the subcarrier spacing of the active downlink bandwidth part of the scheduling cell for the configured grant is used as a downlink subcarrier spacing µDL for calculation of the physical uplink shared channel preparation procedure time of the configured grant.