WO2025199763A1 - Devices and methods of communication - Google Patents

Devices and methods of communication

Info

Publication number
WO2025199763A1
WO2025199763A1 PCT/CN2024/083901 CN2024083901W WO2025199763A1 WO 2025199763 A1 WO2025199763 A1 WO 2025199763A1 CN 2024083901 W CN2024083901 W CN 2024083901W WO 2025199763 A1 WO2025199763 A1 WO 2025199763A1
Authority
WO
WIPO (PCT)
Prior art keywords
terminal device
step report
report
determination
accordance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/CN2024/083901
Other languages
French (fr)
Inventor
Peng Guan
Yukai GAO
Gang Wang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Priority to PCT/CN2024/083901 priority Critical patent/WO2025199763A1/en
Publication of WO2025199763A1 publication Critical patent/WO2025199763A1/en
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H04B7/06952—Selecting one or more beams from a plurality of beams, e.g. beam training, management or sweeping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]

Definitions

  • Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices and computer storage media of communication for a beam reporting.
  • a beam reporting is based on a network (NW) configuration of a periodic or semi-persistent reporting, or a NW trigger of an aperiodic reporting.
  • NW network
  • UL uplink
  • UEI user equipment
  • UEI user equipment
  • a solution of UEI beam reporting is still incomplete and needs to be further developed.
  • embodiments of the present disclosure provide methods, devices and computer storage media of communication for UEI beam reporting.
  • a terminal device comprising a processor configured to cause the terminal device to: determine that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of downlink (DL) reference signal (RS) resources; determine, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and transmit, to a network device, the set of measurement results at least based on the first information.
  • DL downlink
  • RS reference signal
  • a network device comprising a processor configured to cause the network device to: receive, from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources; and transmit, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
  • a method of communication comprises: determining, at a terminal device, that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of DL RS resources; determining, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and transmitting, to a network device, the set of measurement results at least based on the first information.
  • a computer readable medium having instructions stored thereon.
  • the instructions when executed on at least one processor, cause the at least one processor to perform the method according to the third or fourth aspect of the present disclosure.
  • FIG. 1 illustrates an example communication network in which some embodiments of the present disclosure can be implemented
  • FIG. 2 illustrates a signaling chart illustrating a process of communication according to some embodiments of the present disclosure
  • FIG. 3 illustrates a flowchart of a method of communication implemented at a terminal device in accordance with some embodiments of the present disclosure
  • FIG. 4 illustrates a flowchart of a method of communication implemented at a network device in accordance with some embodiments of the present disclosure.
  • FIG. 5 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
  • terminal device refers to any device having wireless or wired communication capabilities.
  • the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, Internet of things (IoT) devices, ultra-reliable and low latency communications (URLLC) devices, Internet of everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for integrated access and backhaul (IAB) , small data transmission (SDT) , mobility, multicast and broadcast services (MBS) , positioning, dynamic/flexible duplex in commercial networks, reduced capability (RedCap) , space borne vehicles or air borne vehicles in non-terrestrial networks (NTN) including Satellites and high altitude platforms (HAPs) encompassing unmanned aircraft systems (UAS) , extended reality (XR) devices
  • UE user equipment
  • the ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple subscriber identity module (SIM) as known as multi-SIM.
  • SIM subscriber identity module
  • the term ‘terminal device’ can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
  • network device refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate.
  • a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , network-controlled Repeaters, and the like.
  • NodeB Node B
  • eNodeB or eNB evolved NodeB
  • gNB next generation NodeB
  • TRP transmission reception point
  • RRU remote radio unit
  • RH radio head
  • RRH remote radio head
  • IAB node a low power node such
  • the terminal device or the network device may have AI/ML capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
  • the terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz to 7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum.
  • the terminal device may have more than one connections with the network devices under MR-DC application scenario.
  • the terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
  • the network device may have the function of network energy saving, self-organizing networks (SON) /minimization of drive tests (MDT) .
  • the terminal may have the function of power saving.
  • test equipment e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
  • the terminal device may be connected with a first network device and a second network device.
  • One of the first network device and the second network device may be a master node and the other one may be a secondary node.
  • the first network device and the second network device may use different radio access technologies (RATs) .
  • the first network device may be a first RAT device and the second network device may be a second RAT device.
  • the first RAT device is eNB and the second RAT device is gNB.
  • Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device.
  • first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device.
  • information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device.
  • Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
  • the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise.
  • the term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’
  • the term ‘based on’ is to be read as ‘at least in part based on. ’
  • the term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’
  • the term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’
  • the terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
  • values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
  • Embodiments of the present disclosure provide solutions of communication for a UEI beam reporting.
  • a terminal device determines first information associated with the reporting of the set of measurement results at least based on the event.
  • the first information comprises at least one of a first spatial filter, a first repetition number, or first transmission power.
  • the terminal device transmits the set of measurement results to a network device at least based on the first information. In this way, a UEI beam reporting may be carried out.
  • a network device may transmit, to a terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report. In this way, a UEI beam reporting may be facilitated.
  • measurement results/measurement information may be in any suitable types such as a layer 1 (L1) value, layer 3 (L3) value, an average value or a filtered value.
  • the measurement results/measurement information includes but is not limited to, L1-reference signal received power (RSRP) , L3-RSRP, RSRP, L1-signal to interference plus noise ratio (SINR) , L3-SINR, SINR, L1-received signal strength indication (RSSI) , L3-RSSI, RSSI, L1-reference signal received quality (RSRQ) , L3-RSRQ, RSRQ, and so on.
  • RSRP L1-reference signal received power
  • RSRP L3-RSRP
  • RSRP L1-signal to interference plus noise ratio
  • SINR L1-received signal strength indication
  • RSSI L3-RSSI
  • RSSI L1-reference signal received quality
  • RSRQ RSRQ
  • FIG. 1 illustrates an example communication network 100 in which embodiments of the present disclosure can be implemented.
  • the communication network 100 includes a terminal device 110 and a network device 120 served by the terminal device 110.
  • the one-step report may be carried out via uplink control information (UCI) or a medium access control (MAC) control element (CE) .
  • UCI uplink control information
  • MAC medium access control
  • CE control element
  • the two-step report may comprise a first-step report and a second-step report, and may be carried out as shown in Table 1 below.
  • the capability information of the terminal device 110 may indicate one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report.
  • the measurement result may be associated with signal strength or beam quality, such as, L1-RSRP, L1-SINR, L1-RSSI, layer 3 (L3) -RSRP, L3-SINR, L3-RSSI and so on. It is to be understood that the event may be implemented in any suitable forms and the present disclosure is not limited in this regard.
  • the configuration may indicate a repetition based transmission for the UEI beam reporting. In some embodiments, the configuration may indicate a repetition number of the UEI beam reporting. In some embodiments, the configuration may indicate a repetition number of a PUCCH resource or a PUSCH transmission which can be used to carry the UEI beam reporting. In some embodiments, the configuration may indicate separated repetition numbers for the one-step report, the first-step of the two-step report, and the second-step report of the two-step report. Alternatively, for the repetition number of the one-step report, the first-step of the two-step report, or the second-step report of the two-step report, the configuration may indicate a respective offset value to the repetition number of the UEI beam reporting.
  • the configuration may indicate a power ramping for the UEI beam reporting.
  • the configuration may indicate a power ramping level (may also referred to as a power ramping step or a power ramping factor herein) for the UEI beam reporting.
  • the configuration may indicate a power ramping level for PUCCH resource or PUSCH transmission which can be used to carry the UEI beam reporting.
  • the configuration may indicate separated power ramping levels for the one-step report, the first-step of the two-step report, and the second-step report of the two-step report. Alternatively, for the power ramping level of the one-step report, the first-step of the two-step report, or the second-step report of the two-step report, the configuration may indicate a respective offset value to the power ramping level of the UEI beam reporting.
  • the configuration may indicate a maximum transmission or retransmission number of the UEI beam reporting. In some embodiments, the configuration may indicate a maximum transmission or retransmission number for a PUCCH resource or PUSCH transmission which can be used to carry the UEI beam reporting. In some embodiments, the configuration may indicate separated maximum transmission or retransmission numbers for the one-step report, the first-step of the two-step report, and the second-step report of the two-step report. Alternatively, for the maximum transmission or retransmission number of the one-step report, the first-step of the two-step report, or the second-step report of the two-step report, the configuration may indicate a respective offset value to the maximum transmission or retransmission number of the UEI beam reporting.
  • the configuration may explicitly indicate whether the one-step or two-step report is to be used for the UEI beam reporting.
  • the configuration may indicate one or more threshold values (e.g., any of the first to tenth ranges, any of the first to fourth number thresholds, the first or second time threshold, and/or the result threshold) for selection of the one-step or two-step report, for determination of the first or second information, and/or for update or cancel of the UEI beam reporting.
  • the configuration of the UEI beam reporting may comprise any combinations of the above configuration information or any other suitable configuration information.
  • the terminal device 110 may need to maintain a UE variable (e.g., UEI_TRANSMISSION_COUNTER) for counting number of transmissions or retransmissions.
  • UEI_TRANSMISSION_COUNTER a UE variable for counting number of transmissions or retransmissions.
  • separated UE variables UEI_TRANSMISSION_COUNTER may be maintained for the one-step report, the first-step report of the two-step report, the second-step report of the two-step report, respectively.
  • the terminal device 110 may need to maintain a UE variable (e.g., UEI_POWER_RAMPING_COUNTER) for counting number of power ramping applied.
  • separated UE variables UEI_POWER_RAMPING_COUNTER may be maintained for the one-step report, the first-step report of the two-step report, the second-step report of the two-step report, respectively.
  • the terminal device 110 may need to maintain a UE variable (e.g., UEI_POWER_RAMPING_STEP) for storing a power-ramping factor.
  • separated UE variables UEI_POWER_RAMPING_STEP may be maintained for the one-step report, the first-step report of the two-step report, the second-step report of the two-step report, respectively. As such, the repetition based transmission and/or the power ramping may be well supported.
  • the terminal device 110 may determine 230 whether the event triggering the UEI beam reporting is fulfilled.
  • the event may be based on a measurement result of a current beam related to an applied TCI state or UL TCI state activated or configured or indicated by NW.
  • the event may at least comprise ‘current beam becomes worse’ .
  • the event may be based on a measurement result of a new beam unrelated to the applied TCI state or UL TCI state activated or configured or indicated by NW.
  • the event may at least comprise ‘new beam becomes better’ . For illustration, some examples of the event are listed below.
  • a first beam may become better than a first threshold, where the first beam may be a recommended beam.
  • a second beam may become worse than a second threshold, where the second beam may be a restricted beam and/or the second beam may be a currently applied beam.
  • the second beam may become an offset worse than the last measurement/report, which suggests that the beam gradually becomes unusable.
  • a third beam may become a first offset better than a fourth beam where the third beam may be a recommended beam and the fourth beam may be a currently applied beam.
  • a currently applied beam may become worse than a third threshold.
  • a fifth beam may become worse than a fourth threshold and a sixth beam may become better than a fifth threshold where the fifth beam may be a currently applied beam and the sixth beam may be a recommended beam.
  • a seventh beam may cause interference strength lower than a first interference threshold, where the seventh beam may be a recommended beam.
  • an eighth beam may cause interference strength higher than a second interference threshold, where the eighth beam may be a restricted beam.
  • a ninth beam transmission power may be higher than a first transmission power threshold, where the ninth beam may be a restricted beam for UL.
  • a 10-th beam transmission power may be lower than a second transmission power threshold, where the 10-th beam may be a recommended beam for UL.
  • an 11-th beam pathloss may be offset lower than a 12-th beam pathloss, where the 11-th beam may be a recommended beam for UL.
  • a 13-th beam transmission power backoff may be offset lower than a 14-th beam transmission power backoff where the 13-th beam may be a recommended beam for UL.
  • a first beam in a first cell may become worse than a first threshold in a first cell where the first beam in the first cell may be a restricted beam in the first cell.
  • a second beam in a second cell may become better than a second threshold in a second cell, where the second beam in the second cell may be a recommended beam in the second cell.
  • a second beam in a second cell may become offset better than a first beam in a first cell, where the second beam in the second cell may be a recommended beam for the second cell and the first beam in the first cell may be a currently applied beam for the first cell.
  • a first beam may become worse than a first threshold in a first mode, where the first beam may be a restricted beam for the first mode and the first mode may be different from the current mode.
  • the event may be defined by an entry condition and a leaving condition, i.e., inequality of entry condition and inequality of leaving condition can be used for different events. It is to be understood that the event may be implemented in any suitable forms. The above examples of the event are merely for illustration, and the present disclosure is not limited in this regard. It is also to be understood that different events may be defined based on different RSs for measurement, such as SSBs or CSI-RSs, or any other suitable RSs.
  • the terminal device 110 may trigger the UEI beam reporting. As shown in FIG. 2, for the UEI beam reporting, the terminal device 110 may determine 240 whether a one-step or two-step report is to be used for the reporting of the set of measurement results.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on a measurement result associated with a DL RS resource.
  • the DL RS resource may be related to an applied TCI state.
  • the DL RS resource may be related to an UL TCI state configured or activated or indicated by the network device 120.
  • the terminal device 110 may determine that the two-step report is to be used. In some embodiments, if the measurement result associated with the DL RS resource is higher than the result threshold, the terminal device 110 may determine that the one-step report is to be used. In some embodiments, if the measurement result associated with the DL RS resource is equal to the result threshold, the terminal device 110 may determine that the two-step report is to be used. In some embodiments, if the measurement result associated with the DL RS resource is equal to the result threshold, the terminal device 110 may determine that the one-step report is to be used. It is to be understood that the result threshold may be pre-configured or pre-defined.
  • the currently applied beam refers to a beam corresponding to the applied TCI state or UL TCI state configured or activated or indicated by the network device 120.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on the latest reporting of the set of measurement results (i.e., the latest UEI beam reporting) . In some embodiments, if the latest UEI beam reporting is a one-step report and is unsuccessful, the terminal device 110 may determine that the two-step report is to be used for the UEI beam reporting.
  • a number threshold also referred to as a third number threshold herein
  • the terminal device 110 may determine that the two-step report is to be used for the current UEI beam reporting. It is to be understood that the third number threshold may be pre-configured or pre-defined.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on the event triggering the UEI beam reporting. In some embodiments, if the event comprises that a first measurement result associated with a first DL RS resource related to an applied TCI state becomes worse (i.e., a current beam becomes worse) , the terminal device 110 may determine that the two-step report is to be used for the UEI beam reporting. In some embodiments, if the event comprises that a second measurement result associated with a second DL RS resource unrelated to the applied TCI state becomes better (i.e., a new beam becomes worse) , the terminal device 110 may determine that the one-step report is to be used for the UEI beam reporting.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on a TCI state configuration. In some embodiments, if the TCI state configuration indicates a joint TCI state is used for both DL and UL, the terminal device 110 may determine that the two-step report is to be used. That is, since ‘joint’ TCI state implies that if quality of a DL beam is not good, a UL beam corresponding to the DL beam is also not suitable for transmission anymore.
  • the terminal device 110 may determine that the one-step report is to be used.
  • the separated TCI states may be used together with quality of a beam associated with the UL TCI state, for selection of the one-step or two-step report.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on a TCI associated with the first spatial filter or based on a cell or a PCI of the TCI associated with the first spatial filter. In some embodiments, if the TCI associated with the first spatial filter is not associated with a first cell with a PCI different from a PCI of a serving cell, the terminal device 110 may determine that the two-step report is to be used. In some embodiments, if the TCI of the first spatial filter is associated with the first cell, the terminal device 110 may determine that the one-step report is to be used.
  • the terminal device 110 may determine that the two-step report is to be used. If an inter-cell operation is configured by the TCI state configuration, which implies that the current serving cell is not good, then the terminal device 110 may determine that the one-step report is to be used.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on availability of a UL resource for the UEI beam reporting.
  • the availability of the UL resource may indicate which UL resource is closest (in time) to the event or to the triggered/prepared UEI beam reporting.
  • the availability of the UL resource may indicate whether the UL resource can accommodate the one-step report.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on capability of the terminal device 110 for the one-step or two-step report (e.g., whether the terminal device 110 supports the one-step or two-step report) .
  • the terminal device 110 may determine whether the one-step or two-step report is to be used based on an indication of the one-step or two-step report from the network device 120.
  • the selection of the one-step or two-step report may be based on any combinations of the above selection manners or any other suitable selection manners.
  • the terminal device 110 may determine 250, at least based on the event, the first information associated with the reporting (i.e., the UEI beam reporting) of the set of measurement results.
  • the first information may comprise at least one of the first spatial filter, the first repetition number, or the first transmission power. It is to be understood that the first information may be used for any of the one-step report, the first-step report of the two-step report or the second-step of the two-step report.
  • the terminal device 110 may determine the first spatial filter without following the applied TCI state.
  • a trigger condition/event is defined as “current beam becomes worse”
  • an UL beam used for transmitting the UEI beam reporting may be a beam different from the current beam, i.e., not following the applied TCI state or UL TCI state configured/activated/indicated by NW.
  • the terminal device 110 may determine the first spatial filter based on one of the following: a default TCI state, a TCI state configured with the lowest ID, a TCI state applied for an associated control resource set (CORESET) , a TCI state configured for a PUCCH resource or a PUSCH transmission which can be used to carry the UEI beam reporting, a TCI state configured for a PUCCH resource with the lowest PUCCH resource ID, a TCI state configured for other component carrier (CC) /bandwidth part (BWP) , etc.
  • a default TCI state a TCI state configured with the lowest ID
  • CORESET control resource set
  • a TCI state configured for a PUCCH resource or a PUSCH transmission which can be used to carry the UEI beam reporting
  • CC component carrier
  • BWP bandwidthwidth part
  • the terminal device 110 may determine the first spatial filter by following the applied TCI state.
  • a trigger condition/event is defined as “a new beam becomes better”
  • an UL beam used for transmitting the UEI beam reporting may be the current beam, i.e., following the applied TCI state or UL TCI state configured/activated/indicated by the network device 120.
  • the terminal device 110 may determine the first repetition number to be a first value. If the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a second range, the terminal device 110 may determine the first repetition number to be a second value. It is to be understood that the first or second range or the first or second value may be pre-configured or pre-defined, and the present disclosure does not limit this aspect.
  • the number of transmissions may depend on the quality of a transmit beam (i.e., first spatial filter) , if the transmit beam is good, a one-time transmission may be sufficient. If the transmit beam is not good, it is considered to use repeated transmissions. For example, it is assumed that RSRP of current beams is used as the trigger condition/event. If RSRP of a current beam corresponding to the transmit beam is lower than or equal to a RSRP threshold, the first repetition number may be determined to be 2. If the RSRP of the current beam corresponding to the transmit beam is higher than the RSRP threshold, the first repetition number may be determined to be 1 (i.e., no repetition) . It is to be understood that more ranges and repetition number values may be used, and the present disclosure is not limited in this regard.
  • the terminal device 110 may determine the first transmission power without using power ramping. If the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fourth range, the terminal device 110 may determine the first transmission power by applying a first power ramping level. If the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fifth range, the terminal device 110 may determine the first transmission power by applying a second power ramping level. It is to be understood that the third or fourth or fifth range or the first or second power ramping level may be pre-configured or pre-defined, and the present disclosure does not limit this aspect.
  • whether to use the power ramping for the retransmission may depend on the quality of the transmit beam. For example, it is assumed that RSRP of current beams is used as the trigger condition/event. If RSRP of a current beam corresponding to the transmit beam is within the third range, the power ramping is not used for determination of the first transmission power. If the RSRP of the current beam corresponding to the transmit beam is within the fourth range, the first power ramping level may be used for determination of the first transmission power. If the RSRP of the current beam corresponding to the transmit beam is within the fifth range, the second power ramping level may be used for determination of the first transmission power. As the transmit beam becomes worse, higher power may be needed. For retransmission, a larger power ramping level may be preferred if the RSRP is lower.
  • the terminal device 110 may determine the first information based on availability of UL resources. For example, the terminal device 110 may determine the first spatial filter, the first repetition number and/or the first transmission power to be applicable for currently available UL resources.
  • the terminal device 110 may determine the first information based on capability of the terminal device 110. For example, the terminal device 110 may determine the first spatial filter, the first repetition number and/or the first transmission power to be within a range supported by the terminal device 110.
  • the terminal device 110 may determine the first information based on NW configuration. For example, the terminal device 110 may determine the first spatial filter, the first repetition number and/or the first transmission power based on an explicit indication of the first spatial filter, the first repetition number and/or the first transmission power from the network device 120.
  • the terminal device 110 may determine the first information based on any combination of the above determination manners or any other suitable determination manners.
  • the terminal device 110 may transmit 260, at least based on the first information, the set of measurement results to the network device 120. As such, the UEI beam reporting may be performed. In some embodiments, if the one-step report is to be used for the reporting of the set of measurement results, the terminal device 110 may perform the one-step report based on the first information.
  • the terminal device 110 may perform the first-step report of the two-step report based on the first information, and perform the second-step report of the two-step report based on a transmission of the first-step report. In this case, it is assumed that the first-step report is successful, and the second-step report is based on the successful transmission of the first-step report.
  • the terminal device 110 may determine the second spatial filter based on the first spatial filter for the first-step report. That is, a UL beam used for transmitting the second-step report of the two-step report may be based on the UL beam for the first-step report. In some embodiments, the terminal device 110 may directly determine the first spatial filter as the second spatial filter. In other words, the UL beam used for transmitting the first-step report and the second-step report of the two-step report may be the same. In some embodiments, if spatial filters are used for transmissions of the first-step report, the terminal device 110 may determine, as the second spatial filter, one of the spatial filters that is used for a last transmission or a successful transmission in the transmissions of the first-step reports. In other words, if different UL beams are used to transmit/retransmit the first-step report, a UL beam used for the last transmission or a UL beam used for the successful transmission may be used for the second-step report.
  • the terminal device 110 may determine the second spatial filter based on the response to the first-step report from the network device 120.
  • the response may carry information of the UL beam used for transmitting the second-step report (i.e., indicate the second spatial filter) .
  • the terminal device 110 may determine the second spatial filter based on the response.
  • the terminal device 110 may determine the second spatial filter based on the number of transmissions or retransmissions of the first-step report. In some embodiments, if the number of transmissions or retransmissions of the first-step report is less than or equal to a first number threshold, the terminal device 110 may determine the first spatial filter as the second spatial filter, i.e., the UL beam used for transmitting the first-step report and the second-step report of the two-step report may be the same. In some embodiments, if the number of transmissions of the first-step report is greater than or equal to the first number threshold, the terminal device 110 may determine the second spatial filter to be different from the first spatial filter.
  • the terminal device 110 may determine the second repetition number based on the first spatial filter for the first-step report (i.e., based on the UL beam for the first-step report) . In some embodiments, if a measurement result associated with a DL RS resource corresponding to the second spatial filter is within a sixth range, the terminal device 110 may determine the second repetition number as a third value. If the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a seventh range, the terminal device 110 may determine the second repetition number as a fourth value. In other words, the second repetition number may be determined based on quality of the UL beam for the first-step report. It is to be understood that the sixth or seventh range or the third or fourth value may be pre-configured or pre-defined, and the present disclosure is not limited in this regard. It is also to be understood that more ranges and repetition number values may be used.
  • the terminal device 110 may determine the second repetition number based on the third information carried in the first-step report.
  • the first-step report may carry information of the number of repetitions for transmitting the second-step report (i.e., indicate the second repetition number) .
  • the terminal device 110 may determine the second repetition number based on the third information (i.e., the content carried in the first-step report) .
  • the terminal device 110 may determine the second repetition number based on the response to the first-step report from the network device 120.
  • the response may carry information of the number of repetitions for transmitting the second-step report (i.e., indicate the second repetition number) .
  • the terminal device 110 may determine the second repetition number based on the response.
  • the terminal device 110 may determine the second repetition number based on the number of transmissions or retransmissions of the first-step report. In some embodiments, if the number of transmissions or retransmissions of the first-step report is less than or equal to a second number threshold, the terminal device 110 may determine the first repetition number as a fifth value. In some embodiments, if the number of transmissions of the first-step report is greater than or equal to the second number threshold, the terminal device 110 may determine the second repetition number to be a sixth value. In some embodiments, the sixth value may be larger than the fifth value. It is to be understood that more ranges and repetition number values may be used.
  • the terminal device 110 may determine the second transmission power based on the first spatial filter for the first-step report (i.e., based on the UL beam for the first-step report) . In some embodiments, if a measurement result associated with a DL RS resource corresponding to the second spatial filter is within an eighth range, the terminal device 110 may determine the second transmission power without using power ramping. If the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a ninth range, the terminal device 110 may determine the second transmission power by applying a third power ramping level.
  • the terminal device 110 may determine the second transmission power by applying a fourth power ramping level.
  • the second transmission power may be determined based on quality of a DL beam corresponding to the UL beam for the first-step report.
  • a larger power ramping level may be applied for a lower RSRP.
  • the eighth or ninth or tenth range or the third or fourth power ramping level may be pre-configured or pre-defined, and the present disclosure is not limited in this regard.
  • the terminal device 110 may determine the second transmission power based on the response to the first-step report from the network device 120.
  • the response may carry information of UL transmission power used for transmitting the second-step report (i.e., indicate the second transmission power) .
  • the terminal device 110 may determine the second transmission power based on the response.
  • the terminal device 110 may determine the second transmission power based on the number of transmissions or retransmissions of the first-step report. In some embodiments, if the number of transmissions or retransmissions of the first-step report is within a first number range, the terminal device 110 may determine the second transmission power without using power ramping. If the number of transmissions of the first-step report is within a second number range, the terminal device 110 may determine the second transmission power by applying a fifth power ramping level. If the number of transmissions of the first-step report is within a third number range, the terminal device 110 may determine the second transmission power by applying a sixth power ramping level. It is to be understood that the first or second or third number range or the fifth or sixth power ramping level may be pre-configured or pre-defined, and the present disclosure is not limited in this regard.
  • the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power based on availability of UL resources. For example, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power to be applicable for currently available UL resources.
  • the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power based on capability of the terminal device 110. For example, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power to be within a range supported by the terminal device 110.
  • the terminal device 110 may determine the second information based on any combination of the above determination manners or any other suitable determination manners.
  • the terminal device 110 may perform 261 the first-step report and the second-step report of the two-step report for the reporting of the set of measurement results. In some embodiments, the terminal device 110 may perform the first-step and second-step reports based on the first and/or second information. It is to be understood that any other suitable ways may also be feasible.
  • the network device 120 may transmit 262, to the terminal device 110, at least one response to the first-step report and the second-step report.
  • the network device 120 may respond the first-step report and the second-step report separately.
  • the second-step report may be based on a successful transmission of the first-step report.
  • the network device 120 may transmit, to the terminal device 110, a response to the first-step report to indicate a successful reception or a retransmission of the first-step report. In some embodiments, upon reception of the second-step report, the network device 120 may transmit, to the terminal device 110, a further response to the second-step report to indicate a successful reception or a retransmission of the second-step report.
  • the network device 120 may respond the first-step report and the second-step report jointly, i.e., the network device 120 may transmit a single response for the first-step report and the second-step report. In this case, the second-step report may not be based on the successful transmission of the first-step report.
  • the first-step report and the second-step report may be associated.
  • the first-step report and the second-step report may be separated by X time units.
  • the first-step report and the second-step report may be transmitted in associated PUCCH/PUSCH resources.
  • the network device 120 may indicate whether to retransmit the first-step report or the second-step report or both. In this way, retransmission efficiency may be improved. In some embodiments, if the retransmission of at least one of the first-step report or the second-step report is needed, the network device 120 may cause the indication of the retransmission of the at least one of the first-step report or the second-step report to be included in the single response. In some embodiments, if retransmissions of both the first-step report and the second-step report are needed, the network device 120 may cause no indication of the retransmissions to be included in the single response by default.
  • the single response may comprise information (e.g., UL resource, time, frequency, UL beam, repetition number, and transmission power) of the retransmission of the first-step report, or the second-step report or both. In this way, the retransmission efficiency may be further improved.
  • the single response may comprise an indication of a switching between the one-step report and the two-step report. In this way, the UEI beam reporting may be achieved in an efficient way.
  • the terminal device 110 may perform 263 the retransmission of at least one of the first-step report or the second-step report.
  • the at least one response comprises a single response to the first-step report and the second-step report.
  • the terminal device 110 may perform the retransmission based on the indication.
  • the terminal device 110 may retransmit both the first-step report and the second-step report by default.
  • the terminal device 110 may determine a first time duration from a first time point to a second time point of retransmitting the one-step report.
  • the first time point may comprise a time point of transmitting the latest one-step report.
  • the first time point may comprise a time point of determining to retransmit the one-step report.
  • the first time point may comprise a time point of the latest RS measurement.
  • the first time duration may be greater than or equal to a first time threshold or a periodicity of RS measurements for the reporting.
  • the set of measurement results are out-of-date or new measurement results can be obtained.
  • the terminal device 110 may update the set of measurement results, and transmit the updated set of measurement results in the retransmission of the one-step report.
  • the transmission or retransmission of the UEI beam reporting may always be based on the latest RS measurements.
  • a timely reporting may be provided and out-of-date reporting may be avoided.
  • the terminal device 110 may not update the report contents for the retransmission of the UEI beam reporting.
  • the terminal device 110 may cancel the reporting of the set of measurement results.
  • first or second or third time threshold or the fourth number threshold may be pre-configured or pre-defined, and the present disclosure is not limited in this regard.
  • embodiments of the present disclosure provide methods of communication implemented at a terminal device and a network device. These methods will be described below with reference to FIGs. 3 and 4.
  • FIG. 3 illustrates a flowchart of a method 300 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure.
  • the method 300 may be performed at the terminal device 110 as shown in FIG. 1.
  • the method 300 will be described with reference to FIG. 1. It is to be understood that the method 300 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
  • the terminal device may determine the first information by at least one of the following: in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a third range, determining the first transmission power without using power ramping; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fourth range, determining the first transmission power by applying a first power ramping level; or in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fifth range, determining the first transmission power by applying a second power ramping level.
  • the terminal device 110 may transmit the set of measurement results by: in accordance with a determination that a two-step report is to be used for the reporting of the set of measurement results, performing a first-step report of the two-step report based on the first information; and performing a second-step report of the two-step report based on a transmission of the first-step report.
  • the terminal device 110 may determine the second information by: determining the second information based on at least one of the following: the first spatial filter for the first-step report, number of transmissions of the first-step report, third information carried in the first-step report, or a response to the first-step report from the network device.
  • the terminal device 110 may determine the second information by at least one of the following: determining the first spatial filter as the second spatial filter; in accordance with a determination that spatial filters are used for transmissions of the first-step report, determining, as the second spatial filter, one of the spatial filters that is used for a last transmission or a successful transmission in the transmissions of the first-step reports; in accordance with a determination that the third information indicates the second spatial filter, determining the second spatial filter based on the third information; in accordance with a determination that the response indicates the second spatial filter, determining the second spatial filter based on the response; in accordance with a determination that the number of transmissions of the first-step report is less than or equal to a first number threshold, determining the first spatial filter as the second spatial filter; or in accordance with a determination that the number of transmissions of the first-step report is greater than the first number threshold, determining the second spatial filter different from the first spatial filter.
  • the terminal device 110 may determine the second information by at least one of the following: in accordance with a determination that a measurement result associated with a DL RS resource corresponding to the second spatial filter is within an eighth range, determining the second transmission power without using power ramping; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a ninth range, determining the second transmission power by applying a third power ramping level; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a tenth range, determining the second transmission power by applying a fourth power ramping level; in accordance with a determination that the response indicates the second transmission power, determining the second transmission power based on the response; in accordance with a determination that the number of transmissions of the first-step report is within a first number range, determining the second transmission power without using power ramping; in accordance with a determination that the number of transmissions of the first-step report is
  • the terminal device 110 may be further caused to: determine whether a one-step or two-step report is to be used for the reporting of the set of measurement results based on at least one of the following: a measurement result associated with a DL RS resource, a latest reporting of the set of measurement results, the event triggering the reporting of the set of measurement results, a TCI state configuration, a TCI associated with the first spatial filter, availability of an uplink resource for the reporting, capability of the terminal device for the one-step or two-step report, or an indication of the one-step or two-step report from the network device.
  • the terminal device 110 may determine whether the one-step or two-step report is to be used by at least one of the following: in accordance with a determination that the measurement result associated with the DL RS resource is lower than a result threshold, determining that the two-step report is to be used; in accordance with a determination that the measurement result associated with the DL RS resource is higher than the result threshold, determining that the one-step report is to be used; in accordance with a determination that the latest reporting is a one-step report and is unsuccessful, determining that the two-step report is to be used; in accordance with a determination that number of transmissions associated with the latest reporting is greater than a third number threshold, determining that the two-step report is to be used; in accordance with a determination that the event comprises a first measurement result associated with a first DL RS resource related to an applied TCI state becomes worse, determining that the two-step report is to be used; in accordance with a determination that the event comprises a second measurement result associated with a
  • the terminal device 110 may transmit the set of measurement results by: performing a first-step report and a second-step report of a two-step report for the reporting of the set of measurement results; receiving, from the network device, at least one response to the first-step report and the second-step report; and performing, based on the at least one response, a retransmission of at least one of the first-step report or the second-step report.
  • the terminal device 110 may perform the retransmission by: in accordance with a determination that the single response comprises an indication of the retransmission of the at least one of the first-step report or the second-step report, performing the retransmission based on the indication; and in accordance with a determination that the single response does not comprise the indication of the retransmission, performing retransmissions of both the first-step report and the second-step report.
  • the terminal device 110 may be further caused to: in accordance with a determination that a retransmission of a one-step report is to be performed for the reporting of the set of measurement results, determine a first time duration from a first time point to a second time point of retransmitting the one-step report, the first time point comprising a time point of transmitting a latest one-step report, a time point of determining to retransmit the one-step report, or a time point of a latest RS measurement; in accordance with a determination that the first time duration is greater than a first time threshold or a periodicity of RS measurements for the reporting, update the set of measurement results; and transmit the updated set of measurement results in the retransmission of the one-step report.
  • the terminal device 110 may be further caused to: in accordance with a determination that a retransmission of a first-step report of a two-step report is to be performed for the reporting of the set of measurement results, perform no update on the set of measurement results; in accordance with a determination that a retransmission of a second-step report of the two-step report is to be performed for the reporting of the set of measurement results, determine a second time duration from a third time point to a fourth time point of retransmitting the second-step report, the third time point comprising a time point of transmitting a latest first-step or second-step report, a time point of determining to retransmit the second-step report, or a time point of a latest RS measurement; in accordance with a determination that the second time duration is greater than a second time threshold or a periodicity of RS measurements for the reporting, update the set of measurement results; and transmit the updated set of measurement results in the retransmission of the second-step report.
  • the terminal device 110 may be further caused to: determine that a retransmission of a second-step report of the two-step report is to be performed for the reporting of the set of measurement results; and cancel the reporting of the set of measurement results based on at least one of the following: number of retransmissions of the second-step report is greater than a fourth number threshold, or a second time duration from a third time point to a fourth time point of retransmitting the second-step report is greater than a second time threshold, the third time point comprising a time point of transmitting a latest first-step or second-step report, a time point of determining to retransmit the second-step report, or a time point of a latest RS measurement.
  • FIG. 4 illustrates a flowchart of a method 400 of communication implemented at a network device in accordance with some embodiments of the present disclosure.
  • the method 400 may be performed at the network device 120 as shown in FIG. 1.
  • the method 400 will be described with reference to FIG. 1. It is to be understood that the method 400 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
  • the network device 120 may receive, from the terminal device 110, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources.
  • the network device 120 may transmit, to the terminal device 110, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
  • the network device 120 may transmit the single response by: in accordance with a determination that the retransmission of the at least one of the first-step report or the second-step report is needed, causing the indication of the retransmission of the at least one of the first-step report or the second-step report to be included in the single response; or in accordance with a determination that retransmissions of both the first-step report and the second-step report are needed, causing no indication of the retransmissions to be included in the single response.
  • the network device 120 may be further caused to: receive, from the terminal device 110, capability information of the terminal device 110 indicating at least one of the following: whether the terminal device 110 supports a one-step or two-step report for the reporting of the set of measurement results; one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report; whether the terminal device 110 supports a repetition based transmission for the reporting of the set of measurement results; whether the terminal device 110 supports a retransmission for the reporting of the set of measurement results; whether the terminal device 110 supports a determination of the first information based on the event; or whether the terminal device 110 supports a determination of second information associated with the second-step report based on a transmission of the first-step report.
  • a UEI beam reporting may be facilitated. It is to be understood that operations of the methods 300 and 400 correspond to that described in connection with FIG. 2, and other details are omitted here for conciseness.
  • FIG. 5 is a simplified block diagram of a device 500 that is suitable for implementing embodiments of the present disclosure.
  • the device 500 can be considered as a further example implementation of the terminal device 110 or the network device 120 as shown in FIG. 1. Accordingly, the device 500 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
  • the device 500 includes a processor 510, a memory 520 coupled to the processor 510, a suitable transceiver 540 coupled to the processor 510, and a communication interface coupled to the transceiver 540.
  • the memory 510 stores at least a part of a program 530.
  • the transceiver 540 may be for bidirectional communications or a unidirectional communication based on requirements.
  • the transceiver 540 may include at least one of a transmitter 542 or a receiver 544.
  • the transmitter 542 and the receiver 544 may be functional modules or physical entities.
  • the transceiver 540 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones.
  • the program 530 is assumed to include program instructions that, when executed by the associated processor 510, enable the device 500 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGs. 1 to 4.
  • the embodiments herein may be implemented by computer software executable by the processor 510 of the device 500, or by hardware, or by a combination of software and hardware.
  • the processor 510 may be configured to implement various embodiments of the present disclosure.
  • a combination of the processor 510 and memory 520 may form processing means 550 adapted to implement various embodiments of the present disclosure.
  • the memory 520 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 520 is shown in the device 500, there may be several physically distinct memory modules in the device 500.
  • the processor 510 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 500 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • a terminal device comprises a circuitry configured to: determine that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of DL RS resources; determine, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and transmit, to a network device, the set of measurement results at least based on the first information.
  • a network device comprises a circuitry configured to: receive, from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources; and transmit, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
  • circuitry used herein may refer to hardware circuits and/or combinations of hardware circuits and software.
  • the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware.
  • the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions.
  • the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation.
  • the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
  • various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGs. 1 to 4.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
  • the machine readable medium may be a machine readable signal medium or a machine readable storage medium.
  • a machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • machine readable storage medium More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM portable compact disc read-only memory
  • magnetic storage device or any suitable combination of the foregoing.

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Abstract

Embodiments of the present disclosure relate to devices and methods of communication. In one aspect, upon determination that an event triggering a reporting of a set of measurement results associated with a set of DL RS resources is fulfilled, a terminal device determines first information associated with the reporting of the set of measurement results at least based on the event. The first information comprises at least one of a first spatial filter, a first repetition number, or first transmission power. The terminal device transmits the set of measurement results to a network device at least based on the first information. In this way, a UEI beam reporting may be carried out.

Description

DEVICES AND METHODS OF COMMUNICATION TECHNICAL FIELD
Embodiments of the present disclosure generally relate to the field of telecommunication, and in particular, to methods, devices and computer storage media of communication for a beam reporting.
BACKGROUND
Conventionally, a beam reporting is based on a network (NW) configuration of a periodic or semi-persistent reporting, or a NW trigger of an aperiodic reporting. This will result in large uplink (UL) reporting overhead and control signaling overhead. Thus, it is proposed to specify user equipment (UE) -initiated (UEI) or event-driven beam management for reducing overhead and/or latency. However, a solution of UEI beam reporting is still incomplete and needs to be further developed.
SUMMARY
In general, embodiments of the present disclosure provide methods, devices and computer storage media of communication for UEI beam reporting.
In a first aspect, there is provided a terminal device. The terminal device comprises a processor configured to cause the terminal device to: determine that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of downlink (DL) reference signal (RS) resources; determine, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and transmit, to a network device, the set of measurement results at least based on the first information.
In a second aspect, there is provided a network device. The network device comprises a processor configured to cause the network device to: receive, from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources; and transmit, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
In a third aspect, there is provided a method of communication. The method comprises: determining, at a terminal device, that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of DL RS resources; determining, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and transmitting, to a network device, the set of measurement results at least based on the first information.
In a fourth aspect, there is provided a method of communication. The method comprises: receiving, at a network device and from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources; and transmitting, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
In a fifth aspect, there is provided a computer readable medium having instructions stored thereon. The instructions, when executed on at least one processor, cause the at least one processor to perform the method according to the third or fourth aspect of the present disclosure.
Other features of the present disclosure will become easily comprehensible through the following description.
BRIEF DESCRIPTION OF THE DRAWINGS
Through the more detailed description of some embodiments of the present disclosure in the accompanying drawings, the above and other objects, features and advantages of the present disclosure will become more apparent, wherein:
FIG. 1 illustrates an example communication network in which some embodiments of the present disclosure can be implemented;
FIG. 2 illustrates a signaling chart illustrating a process of communication according to some embodiments of the present disclosure;
FIG. 3 illustrates a flowchart of a method of communication implemented at a terminal device in accordance with some embodiments of the present disclosure;
FIG. 4 illustrates a flowchart of a method of communication implemented at a  network device in accordance with some embodiments of the present disclosure; and
FIG. 5 is a simplified block diagram of a device that is suitable for implementing embodiments of the present disclosure.
Throughout the drawings, the same or similar reference numerals represent the same or similar element.
DETAILED DESCRIPTION
Principle of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitations as to the scope of the disclosure. The disclosure described herein can be implemented in various manners other than the ones described below.
In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
As used herein, the term ‘terminal device’ refers to any device having wireless or wired communication capabilities. Examples of the terminal device include, but not limited to, user equipment (UE) , personal computers, desktops, mobile phones, cellular phones, smart phones, personal digital assistants (PDAs) , portable computers, tablets, wearable devices, Internet of things (IoT) devices, ultra-reliable and low latency communications (URLLC) devices, Internet of everything (IoE) devices, machine type communication (MTC) devices, device on vehicle for V2X communication where X means pedestrian, vehicle, or infrastructure/network, devices for integrated access and backhaul (IAB) , small data transmission (SDT) , mobility, multicast and broadcast services (MBS) , positioning, dynamic/flexible duplex in commercial networks, reduced capability (RedCap) , space borne vehicles or air borne vehicles in non-terrestrial networks (NTN) including Satellites and high altitude platforms (HAPs) encompassing unmanned aircraft systems (UAS) , extended reality (XR) devices including different types of realities such as augmented reality (AR) , mixed reality (MR) and virtual reality (VR) , the unmanned aerial vehicle (UAV) commonly known as a drone which is an aircraft without any human pilot, devices on high speed train (HST) , or image capture devices such as digital cameras, sensors, gaming devices, music storage and  playback appliances, or Internet appliances enabling wireless or wired Internet access and browsing and the like. The ‘terminal device’ can further has ‘multicast/broadcast’ feature, to support public safety and mission critical, V2X applications, transparent IPv4/IPv6 multicast delivery, IPTV, smart TV, radio services, software delivery over wireless, group communications and IoT applications. It may also incorporate one or multiple subscriber identity module (SIM) as known as multi-SIM. The term ‘terminal device’ can be used interchangeably with a UE, a mobile station, a subscriber station, a mobile terminal, a user terminal or a wireless device.
The term ‘network device’ refers to a device which is capable of providing or hosting a cell or coverage where terminal devices can communicate. Examples of a network device include, but not limited to, a Node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a next generation NodeB (gNB) , a transmission reception point (TRP) , a remote radio unit (RRU) , a radio head (RH) , a remote radio head (RRH) , an IAB node, a low power node such as a femto node, a pico node, a reconfigurable intelligent surface (RIS) , network-controlled Repeaters, and the like.
The terminal device or the network device may have AI/ML capability. It generally includes a model which has been trained from numerous collected data for a specific function, and can be used to predict some information.
The terminal or the network device may work on several frequency ranges, e.g. FR1 (410 MHz to 7125 MHz) , FR2 (24.25GHz to 71GHz) , frequency band larger than 100GHz as well as Tera Hertz (THz) . It can further work on licensed/unlicensed/shared spectrum. The terminal device may have more than one connections with the network devices under MR-DC application scenario. The terminal device or the network device can work on full duplex, flexible duplex and cross division duplex modes.
The network device may have the function of network energy saving, self-organizing networks (SON) /minimization of drive tests (MDT) . The terminal may have the function of power saving.
The embodiments of the present disclosure may be performed in test equipment, e.g. signal generator, signal analyzer, spectrum analyzer, network analyzer, test terminal device, test network device, channel emulator.
In one embodiment, the terminal device may be connected with a first network device and a second network device. One of the first network device and the second  network device may be a master node and the other one may be a secondary node. The first network device and the second network device may use different radio access technologies (RATs) . In one embodiment, the first network device may be a first RAT device and the second network device may be a second RAT device. In one embodiment, the first RAT device is eNB and the second RAT device is gNB. Information related with different RATs may be transmitted to the terminal device from at least one of the first network device or the second network device. In one embodiment, first information may be transmitted to the terminal device from the first network device and second information may be transmitted to the terminal device from the second network device directly or via the first network device. In one embodiment, information related with configuration for the terminal device configured by the second network device may be transmitted from the second network device via the first network device. Information related with reconfiguration for the terminal device configured by the second network device may be transmitted to the terminal device from the second network device directly or via the first network device.
As used herein, the singular forms ‘a’ , ‘an’ and ‘the’ are intended to include the plural forms as well, unless the context clearly indicates otherwise. The term ‘includes’ and its variants are to be read as open terms that mean ‘includes, but is not limited to. ’ The term ‘based on’ is to be read as ‘at least in part based on. ’ The term ‘one embodiment’ and ‘an embodiment’ are to be read as ‘at least one embodiment. ’ The term ‘another embodiment’ is to be read as ‘at least one other embodiment. ’ The terms ‘first, ’ ‘second, ’ and the like may refer to different or same objects. Other definitions, explicit and implicit, may be included below.
In some examples, values, procedures, or apparatus are referred to as ‘best, ’ ‘lowest, ’ ‘highest, ’ ‘minimum, ’ ‘maximum, ’ or the like. It will be appreciated that such descriptions are intended to indicate that a selection among many used functional alternatives can be made, and such selections need not be better, smaller, higher, or otherwise preferable to other selections.
Embodiments of the present disclosure provide solutions of communication for a UEI beam reporting. In one aspect, upon determination that an event triggering a reporting of a set of measurement results associated with a set of DL RS resources is fulfilled, a terminal device determines first information associated with the reporting of the set of measurement results at least based on the event. The first information comprises at least one of a first spatial filter, a first repetition number, or first transmission power. The terminal device  transmits the set of measurement results to a network device at least based on the first information. In this way, a UEI beam reporting may be carried out.
In another aspect, upon reception of a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources, a network device may transmit, to a terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report. In this way, a UEI beam reporting may be facilitated.
As used herein, measurement results/measurement information may be in any suitable types such as a layer 1 (L1) value, layer 3 (L3) value, an average value or a filtered value. For example, the measurement results/measurement information includes but is not limited to, L1-reference signal received power (RSRP) , L3-RSRP, RSRP, L1-signal to interference plus noise ratio (SINR) , L3-SINR, SINR, L1-received signal strength indication (RSSI) , L3-RSSI, RSSI, L1-reference signal received quality (RSRQ) , L3-RSRQ, RSRQ, and so on. The present disclosure is not limited in this regard, and any other suitable types may also be feasible. In some embodiments, NW may indicate a type of measurement results/measurement information to a terminal device. In some embodiments, a terminal device may request a type of measurement results/measurement information from NW. In some embodiments, a terminal device may report a type of measurement results/measurement information.
For a UEI beam reporting, the set of measurement results may be derived based on various signals and/or channels, including at least one of the following: a synchronization signal and physical broadcast channel (PBCH) block (SSB) for intra-cell and inter-cell, and periodic channel status information (CSI) -RS for beam management; semi-persistent CSI-RS and aperiodic CSI-RS; if L1-SINR measurement is applied, it is assumed that existing RS or RS combination (e.g., channel measurement resource (CMR) only, CMR+zero-power (ZP) /non-zero-power (NZP) -interference measurement resource (IMR) ) for SINR is reused; a TCI state, comprising a unified TCI state, a DL or joint TCI state, a UL TCI state, a spatial relation, or a RS associated with the TCI state (including QCL reference RS configured in the TCI states, or QCL type D RS) ; a SSB, comprising a SSB from a serving TRP, a SSB from a serving cell, a SSB from other cells, or a SSB from other cells with different physical cell identities (PCIs) ; a CSI-RS, comprising a CSI-RS for beam management (e.g., configured for L1-RSRP/SINR report) , a CSI-RS for channel acquisition (e.g., configured  for RI/PMI/CQI report) , a CSI-RS for mobility, a CSI-RS from other cell, a CSI-RS for tracking, a CSI-RS for candidate beams for beam failure recovery, or a CSI-RS for radio link monitoring or for beam failure detection; or a sounding reference signal (SRS) , a positioning reference signal (PRS) , a phase tracking reference signal (PTRS) , a demodulation reference signal (DMRS) , a pathloss reference signal (PL-RS) , etc.
As used herein, a beam may be associated with a RS (e.g., SSB, CSI-RS, or SRS) , a RS resource, RS resource identity (ID) , (channel/interference) measurement RS/resource, quasi co-location (QCL) RS, source RS, reference RS, type of quasi-colocation (QCL) (e.g., type A/B/C/D) , (source/reference) RS of a type of QCL, transmission configuration indicator (TCI) state, spatial receive (Rx) parameter, UL transmit (Tx) spatial filter, spatial filter, path loss (reference) RS, power control related parameter, spatial relation, or spatial relation information. In view this, the above terms may be interchangeably used with each other. In summary, a beam may refer to a resource that enables a spatially directional communication, and thus may be identified by other suitable parameters in other embodiments. The present disclosure is not limited in this regard.
Principles and implementations of the present disclosure will be described in detail below with reference to the figures.
EXAMPLE OF COMMUNICATION NETWORK
FIG. 1 illustrates an example communication network 100 in which embodiments of the present disclosure can be implemented. As shown in Fig. 1, the communication network 100 includes a terminal device 110 and a network device 120 served by the terminal device 110.
As shown in FIG. 1, the terminal device 110 may have a plurality of beams, and the network device 120 may have a plurality of beams. A channel (or called as a sub-channel) may be formed between one of the beams of the terminal device 110 and one of the beams of the network device 120. The terminal device 110 may transmit information to the network device 120 or receive information from the network device 120 via one or more of the sub-channels.
It is to be understood that the number of devices and beams in FIG. 1 is given for the purpose of illustration without suggesting any limitations to the present disclosure. The communication network 100 may include any suitable number of network devices and/or terminal devices and/or beams adapted for implementing implementations of the present  disclosure.
The communications in the communication network 100 may conform to any suitable standards including, but not limited to, global system for mobile communications (GSM) , long term evolution (LTE) , LTE-evolution, LTE-advanced (LTE-A) , new radio (NR) , wideband code division multiple access (WCDMA) , code division multiple access (CDMA) , GSM EDGE radio access network (GERAN) , machine type communication (MTC) and the like. The embodiments of the present disclosure may be performed according to any generation communication protocols either currently known or to be developed in the future. Examples of the communication protocols include, but not limited to, the first generation (1G) , the second generation (2G) , 2.5G, 2.75G, the third generation (3G) , the fourth generation (4G) , 4.5G, the fifth generation (5G) communication protocols, 5.5G, 5G-advanced networks, or the sixth generation (6G) networks.
Communication in a direction from the terminal device 110 towards the network device 120 is referred to as UL communication, while communication in a reverse direction from the network device 120 towards the terminal device 110 is referred to as DL communication. A wireless communication channel may comprise a physical uplink control channel (PUCCH) , a physical uplink shared channel (PUSCH) , a physical random-access channel (PRACH) , a physical downlink control channel (PDCCH) , a physical downlink shared channel (PDSCH) and a PBCH.
A UEI beam reporting may at least support reporting a DL RS resource indicator and L1-RSRP (including absolute value, differential value, and/or filtered value) , and one of the following: a restricted/recommended beam indication type of information used as a restricted/recommended beam indication, a cause of the UEI beam reporting (e.g., an event ID that triggers the UEI beam reporting) , beam quality and type of metric used as beam quality, associated channels/signals that the restricted/recommended beam applies, associated beams with the restricted/recommended beam and type of information used as associated beam indications, associated cells information, or associated operation mode information.
For a UEI beam reporting, solutions of one-step report and two-step report have been proposed. The term ‘one-step report’ herein means that a set of measurement results are transmitted in one step or in one time or in one report or in one part or in one channel. The term ‘one-step report’ herein may be interchangeably used with ‘one-stage report’ , ‘one- phase report’ , ‘one-step UEI beam report’ , etc. The term ‘two-step report’ herein means that a set of measurement results are transmitted in two or more steps or in two or more times or in two or more reports or in two or more parts or in two or more channels. The term ‘two-step report’ herein may be interchangeably used with ‘two-stage report’ , ‘two-phase report’ , ‘two-step UEI beam report’ , ‘multiple-step report’ , ‘multiple-stage report’ , ‘multiple-phase report’ , ‘multiple-step UEI beam report’ , etc.
It is to be understood that the term ‘one-step’ or ‘two-step’ herein is defined only for UL transmission, without including DL reception. In consideration with the DL reception, the one-step report may include two steps of transmitting a report and receiving a response from NW. The two-step report may include third steps of transmitting a first-step report, transmitting a second-step report, and receiving a response to the first-step and second-step reports, or include fourth steps of transmitting a first-step report, receiving a response to the first-step report, transmitting a second-step report, and receiving a response to the second-step report.
The one-step report may be carried out via uplink control information (UCI) or a medium access control (MAC) control element (CE) . The two-step report may comprise a first-step report and a second-step report, and may be carried out as shown in Table 1 below.
Table 1

It is to be understood that there may be various channels/resources used for the first-step report and the second-step of the two-step report, and various signaling contents carried in the first-step report and the second-step of the two-step report. The present disclosure is not limited in this regard. In some embodiments, the channels/resources may be dedicated for a terminal device, or common for all terminal devices, or group-common for a group of terminal devices. In some embodiments, the channels/resources may be dedicated for a UEI beam reporting. In some embodiments, the channels/resources may be non-dedicated, e.g., may be any configured channels/resources.
However, it is still unclear how to select the one-step report or the two-step reports for a beam reporting. It is also unclear how to determine UL transmission parameters for the one-step report and the two-step report.
Embodiments of the present disclosure provide solutions of communication so as to solve the above and other potential issues. The solutions will be described in detail with reference to FIG. 2 below.
EXAMPLE IMPLEMENTATION OF UEI BEAM REPORTING
FIG. 2 illustrates a signaling chart illustrating a process 200 of communication according to some embodiments of the present disclosure. For the purpose of discussion, the process 200 will be described with reference to FIG. 1. The process 200 may involve the terminal device 110 and the network device 120 as illustrated in FIG. 1. It is to be understood that steps and an order of the steps in FIG. 2 are merely for illustration, and not for limitation. For example, the order of the steps may be changed. Some of the steps may be omitted or any other suitable additional steps may be added.
As shown in FIG. 2, the terminal device 110 may transmit 210, to the network device 120, capability information of the terminal device 110 on a UEI beam reporting. In some embodiments, the capability information may be carried in a UE capability reporting information elements in a UE capability transfer procedure. In some embodiments, the capability information may be carried in a UE assistance information (UAI) message.
In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a one-step or two-step report for a reporting (i.e., UEI beam reporting) of a set of measurement results associated with a set of DL RS resources.
In some embodiments, the capability information of the terminal device 110 may indicate one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report.
In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a repetition based transmission for the reporting of the set of measurement results. In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports the repetition based transmission for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report.
In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a retransmission for the reporting of the set of measurement results. In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a retransmission for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report.
In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a power ramping for the reporting of the set of measurement results. In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a power ramping for at least one of the one-step report, the first-step report of the two-step report or the second-step report of the two-step report. In some embodiments, the capability information of the terminal device 110 may indicate the supported power ramping step size (s) for at least one of the one-step report, the first-step report of the two-step report or the second-step report of  the two-step report, jointly or separately.
In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a determination of information (also referred to as first information herein) associated with the reporting of the set of measurement results based on an event (or condition) triggering the reporting of the set of measurement results. In some embodiments where the first information comprises at least one of a spatial filter (also referred to as first spatial filter herein) , a repetition number (also referred to as first repetition number herein) , or transmission power (also referred to as first transmission power herein) , the capability information of the terminal device 110 may indicate whether the terminal device 110 supports the spatial filter, the repetition number, and/or the transmission power of the one-step report, a first-step report of the two-step report and/or a second-step report of the two-step report determined based on the event triggering the reporting of the set of measurement results.
In some embodiments, the capability information of the terminal device 110 may indicate whether the terminal device 110 supports a determination of information (also referred to as second information herein) associated with the second-step report based on a transmission of the first-step report. In some embodiments where the second information comprises at least one of a spatial filter (also referred to as second spatial filter herein) , a repetition number (also referred to as second repetition number herein) , or transmission power (also referred to as second transmission power herein) , the capability information of the terminal device 110 may indicate whether the terminal device 110 supports the spatial filter, the repetition number, and/or the transmission power of the second-step report of the two-step report determined based on the transmission of the first-step report of the two-step report.
In some embodiments, the capability information of the terminal device 110 may indicate a first or second range of measurement results supported for determination of the first repetition number. In some embodiments, the capability information of the terminal device 110 may indicate a third or fourth or fifth range of measurement results supported for determination of the first transmission power.
In some embodiments, the capability information of the terminal device 110 may indicate a first number threshold supported for comparison with number of transmissions of the first-step report upon determination of the second spatial filter. In some embodiments,  the capability information of the terminal device 110 may indicate a sixth or seventh range of measurement results supported for determination of the second repetition number. In some embodiments, the capability information of the terminal device 110 may indicate a second number threshold supported for comparison with number of transmissions of the first-step report upon determination of the second repetition number. In some embodiments, the capability information of the terminal device 110 may indicate an eighth or ninth or tenth range of measurement results supported for determination of the second transmission power. In some embodiments, the capability information of the terminal device 110 may indicate a first or second or third number range of the number of transmissions of the first-step report supported for determination of the second transmission power.
In some embodiments, the capability information of the terminal device 110 may indicate a result threshold of measurement results for selection of the one-step or two-step report. In some embodiments, the capability information of the terminal device 110 may indicate a third number threshold for comparison with number of transmissions associated with the latest reporting upon selection of the one-step or two-step report.
In some embodiments, the capability information of the terminal device 110 may indicate a first time threshold supported for update of the set of measurement results upon retransmission of the one-step report. In some embodiments, the capability information of the terminal device 110 may indicate a first or second time threshold supported for update of the set of measurement results.
In some embodiments, the capability information of the terminal device 110 may indicate a fourth number threshold supported for comparison with number of retransmissions of the second-step report upon determination of whether to drop the reporting of the set of measurement results. In some embodiments, the capability information of the terminal device 110 may indicate a second time threshold supported for determination of whether to drop the reporting of the set of measurement results.
It is to be understood that the capability information of the terminal device 110 may comprise any combination of the above capability information or any other suitable capability information.
Continuing to refer to FIG. 2, the network device 120 may transmit 220, to the terminal device 110, a configuration of the UEI beam reporting, e.g., via a radio resource control (RRC) signaling or any other suitable ways. In some embodiments, the network  device 120 may generate the configuration based on the capability information of the terminal device 110. It is to be understood that the configuration may also be generated without the capability information of the terminal device 110.
In some embodiments, the configuration may indicate an event triggering the UEI beam reporting. In some embodiments, the event may be based on a first measurement result associated with a first DL RS resource related to an applied TCI state (i.e., a measurement result of a currently applied beam) . In some embodiments, the event may at least comprise that the first measurement result associated with the first DL RS resource related to the applied TCI state becomes worse (e.g., worse than a first threshold) .
In some embodiments, the event may be based on a second measurement result associated with a second DL RS resource unrelated to the applied TCI state (i.e., a measurement result of a new beam) . In some embodiments, the event may at least comprise that the second measurement result associated with the second DL RS resource unrelated to the applied TCI state becomes better (e.g., better than a second threshold) .
In some embodiments, the measurement result may be associated with signal strength or beam quality, such as, L1-RSRP, L1-SINR, L1-RSSI, layer 3 (L3) -RSRP, L3-SINR, L3-RSSI and so on. It is to be understood that the event may be implemented in any suitable forms and the present disclosure is not limited in this regard.
In some embodiments, the configuration may indicate a repetition based transmission for the UEI beam reporting. In some embodiments, the configuration may indicate a repetition number of the UEI beam reporting. In some embodiments, the configuration may indicate a repetition number of a PUCCH resource or a PUSCH transmission which can be used to carry the UEI beam reporting. In some embodiments, the configuration may indicate separated repetition numbers for the one-step report, the first-step of the two-step report, and the second-step report of the two-step report. Alternatively, for the repetition number of the one-step report, the first-step of the two-step report, or the second-step report of the two-step report, the configuration may indicate a respective offset value to the repetition number of the UEI beam reporting.
In some embodiments, the configuration may indicate a power ramping for the UEI beam reporting. In some embodiments, the configuration may indicate a power ramping level (may also referred to as a power ramping step or a power ramping factor herein) for the UEI beam reporting. In some embodiments, the configuration may indicate a power  ramping level for PUCCH resource or PUSCH transmission which can be used to carry the UEI beam reporting. In some embodiments, the configuration may indicate separated power ramping levels for the one-step report, the first-step of the two-step report, and the second-step report of the two-step report. Alternatively, for the power ramping level of the one-step report, the first-step of the two-step report, or the second-step report of the two-step report, the configuration may indicate a respective offset value to the power ramping level of the UEI beam reporting.
In some embodiments, the configuration may indicate a maximum transmission or retransmission number of the UEI beam reporting. In some embodiments, the configuration may indicate a maximum transmission or retransmission number for a PUCCH resource or PUSCH transmission which can be used to carry the UEI beam reporting. In some embodiments, the configuration may indicate separated maximum transmission or retransmission numbers for the one-step report, the first-step of the two-step report, and the second-step report of the two-step report. Alternatively, for the maximum transmission or retransmission number of the one-step report, the first-step of the two-step report, or the second-step report of the two-step report, the configuration may indicate a respective offset value to the maximum transmission or retransmission number of the UEI beam reporting.
In some embodiments, the configuration may explicitly indicate whether the one-step or two-step report is to be used for the UEI beam reporting. In some embodiments, the configuration may indicate one or more threshold values (e.g., any of the first to tenth ranges, any of the first to fourth number thresholds, the first or second time threshold, and/or the result threshold) for selection of the one-step or two-step report, for determination of the first or second information, and/or for update or cancel of the UEI beam reporting.
It is to be understood that the configuration of the UEI beam reporting may comprise any combinations of the above configuration information or any other suitable configuration information.
In some embodiments, the terminal device 110 may need to maintain a UE variable (e.g., UEI_TRANSMISSION_COUNTER) for counting number of transmissions or retransmissions. In some embodiments, separated UE variables UEI_TRANSMISSION_COUNTER may be maintained for the one-step report, the first-step report of the two-step report, the second-step report of the two-step report, respectively. In some embodiments, the terminal device 110 may need to maintain a UE variable (e.g.,  UEI_POWER_RAMPING_COUNTER) for counting number of power ramping applied. In some embodiments, separated UE variables UEI_POWER_RAMPING_COUNTER may be maintained for the one-step report, the first-step report of the two-step report, the second-step report of the two-step report, respectively. In some embodiments, the terminal device 110 may need to maintain a UE variable (e.g., UEI_POWER_RAMPING_STEP) for storing a power-ramping factor. In some embodiments, separated UE variables UEI_POWER_RAMPING_STEP may be maintained for the one-step report, the first-step report of the two-step report, the second-step report of the two-step report, respectively. As such, the repetition based transmission and/or the power ramping may be well supported.
Continuing to refer to FIG. 2, the terminal device 110 may determine 230 whether the event triggering the UEI beam reporting is fulfilled. In some embodiments, the event may be based on a measurement result of a current beam related to an applied TCI state or UL TCI state activated or configured or indicated by NW. In some embodiments, the event may at least comprise ‘current beam becomes worse’ . In some embodiments, the event may be based on a measurement result of a new beam unrelated to the applied TCI state or UL TCI state activated or configured or indicated by NW. In some embodiments, the event may at least comprise ‘new beam becomes better’ . For illustration, some examples of the event are listed below.
- Event 1: a first beam may become better than a first threshold, where the first beam may be a recommended beam.
- Event 2: a second beam may become worse than a second threshold, where the second beam may be a restricted beam and/or the second beam may be a currently applied beam.
- Event 2A: the second beam may become an offset worse than the last measurement/report, which suggests that the beam gradually becomes unusable.
- Event 3: a third beam may become a first offset better than a fourth beam where the third beam may be a recommended beam and the fourth beam may be a currently applied beam.
- Event 4: a currently applied beam may become worse than a third threshold.
- Event 5: a fifth beam may become worse than a fourth threshold and a sixth beam may become better than a fifth threshold where the fifth beam may be a currently applied beam and the sixth beam may be a recommended beam.
- Event 7: a seventh beam may cause interference strength lower than a first interference  threshold, where the seventh beam may be a recommended beam.
- Event 8: an eighth beam may cause interference strength higher than a second interference threshold, where the eighth beam may be a restricted beam.
- Event 9: a ninth beam transmission power may be higher than a first transmission power threshold, where the ninth beam may be a restricted beam for UL.
- Event 10: a 10-th beam transmission power may be lower than a second transmission power threshold, where the 10-th beam may be a recommended beam for UL.
- Event 11: an 11-th beam pathloss may be offset lower than a 12-th beam pathloss, where the 11-th beam may be a recommended beam for UL.
- Event 12: a 13-th beam transmission power backoff may be offset lower than a 14-th beam transmission power backoff where the 13-th beam may be a recommended beam for UL.
- Event 21: a first beam in a first cell may become worse than a first threshold in a first cell where the first beam in the first cell may be a restricted beam in the first cell.
- Event 22: a second beam in a second cell may become better than a second threshold in a second cell, where the second beam in the second cell may be a recommended beam in the second cell.
- Event 23: a second beam in a second cell may become offset better than a first beam in a first cell, where the second beam in the second cell may be a recommended beam for the second cell and the first beam in the first cell may be a currently applied beam for the first cell.
- Event 24: a first beam in a first cell may become worse than a first threshold and a second beam in a second cell may become better than a second threshold, where the second beam in the second cell may be a recommended beam for the second cell and the first beam in the first cell may be a currently applied beam for the first cell.
- Event 25: a first beam may become worse than a first threshold in a first mode, where the first beam may be a restricted beam for the first mode and the first mode may be different from the current mode.
- Event 26: a second beam may become better than a second threshold in a first mode where the second beam may be a recommended beam for the first mode.
- Event 27: a second beam may become offset better than a first beam in a first mode, where the second beam may be a recommended beam for the first mode and the first beam may be a currently applied beam.
- Event 28: a first beam in a first mode may become worse than a first threshold and a second beam in a first mode may become better than a second threshold, where the second beam in the second mode may be recommended and the first beam in the first mode may be a currently applied beam.
- Event 29: a first beam in a first mode may become worse than a first threshold and a first beam in a second mode may become better than a second threshold, where the second mode may be recommended.
- Event 41: quality of at least one of the current beam is worse than a certain threshold.
- Event 42: quality of at least one new beam, such as L1-RSRP, becomes better than the current beam by a threshold value.
- Event 43: quality of at least a new beam is better than a certain threshold.
- Event 44: quality of at least one of the current beam is worse than a first threshold, and quality of at least one new beam is better than a second threshold.
- Event 45: quality of at least one activated beam becomes better than the current beam by a threshold value.
- Event 46: quality of at least one inactive beam becomes better than one of the activated TCI states by a threshold value.
In some embodiments, the event may be defined by an entry condition and a leaving condition, i.e., inequality of entry condition and inequality of leaving condition can be used for different events. It is to be understood that the event may be implemented in any suitable forms. The above examples of the event are merely for illustration, and the present disclosure is not limited in this regard. It is also to be understood that different events may be defined based on different RSs for measurement, such as SSBs or CSI-RSs, or any other suitable RSs.
When the event is fulfilled, the terminal device 110 may trigger the UEI beam reporting. As shown in FIG. 2, for the UEI beam reporting, the terminal device 110 may determine 240 whether a one-step or two-step report is to be used for the reporting of the set of measurement results.
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used based on a measurement result associated with a DL RS resource. In some embodiments, the DL RS resource may be related to an applied TCI state. In some embodiments, the DL RS resource may be related to an UL TCI state configured or activated or indicated by the network device 120.
In some embodiments, if the measurement result associated with the DL RS resource is lower than a result threshold, the terminal device 110 may determine that the two-step report is to be used. In some embodiments, if the measurement result associated with the DL RS resource is higher than the result threshold, the terminal device 110 may determine that the one-step report is to be used. In some embodiments, if the measurement result associated with the DL RS resource is equal to the result threshold, the terminal device 110 may determine that the two-step report is to be used. In some embodiments, if the measurement result associated with the DL RS resource is equal to the result threshold, the terminal device 110 may determine that the one-step report is to be used. It is to be understood that the result threshold may be pre-configured or pre-defined.
In other words, if a currently applied beam is good, all contents of UEI beam reporting may be carried in the one-step report. If the currently applied beam is not good, it is considered to use multiple transmissions such as the two-step report. The currently applied beam refers to a beam corresponding to the applied TCI state or UL TCI state configured or activated or indicated by the network device 120.
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used based on the latest reporting of the set of measurement results (i.e., the latest UEI beam reporting) . In some embodiments, if the latest UEI beam reporting is a one-step report and is unsuccessful, the terminal device 110 may determine that the two-step report is to be used for the UEI beam reporting. In some embodiments, if number of transmissions associated with the latest UEI beam reporting is greater than or equal to a number threshold (also referred to as a third number threshold herein) , which means that the one-step report method is not suitable and causes latency or overhead, then the terminal device 110 may determine that the two-step report is to be used for the current UEI beam reporting. It is to be understood that the third number threshold may be pre-configured or pre-defined.
In some embodiments, the terminal device 110 may determine whether the one-step  or two-step report is to be used based on the event triggering the UEI beam reporting. In some embodiments, if the event comprises that a first measurement result associated with a first DL RS resource related to an applied TCI state becomes worse (i.e., a current beam becomes worse) , the terminal device 110 may determine that the two-step report is to be used for the UEI beam reporting. In some embodiments, if the event comprises that a second measurement result associated with a second DL RS resource unrelated to the applied TCI state becomes better (i.e., a new beam becomes worse) , the terminal device 110 may determine that the one-step report is to be used for the UEI beam reporting.
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used based on a TCI state configuration. In some embodiments, if the TCI state configuration indicates a joint TCI state is used for both DL and UL, the terminal device 110 may determine that the two-step report is to be used. That is, since ‘joint’ TCI state implies that if quality of a DL beam is not good, a UL beam corresponding to the DL beam is also not suitable for transmission anymore.
In some embodiments, if the TCI state configuration indicates separated TCI states are used for DL and UL, the terminal device 110 may determine that the one-step report is to be used. Alternatively or additionally, the separated TCI states may be used together with quality of a beam associated with the UL TCI state, for selection of the one-step or two-step report.
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used based on a TCI associated with the first spatial filter or based on a cell or a PCI of the TCI associated with the first spatial filter. In some embodiments, if the TCI associated with the first spatial filter is not associated with a first cell with a PCI different from a PCI of a serving cell, the terminal device 110 may determine that the two-step report is to be used. In some embodiments, if the TCI of the first spatial filter is associated with the first cell, the terminal device 110 may determine that the one-step report is to be used. In other words, if an intra-cell operation is configured by the TCI state configuration, the terminal device 110 may determine that the two-step report is to be used. If an inter-cell operation is configured by the TCI state configuration, which implies that the current serving cell is not good, then the terminal device 110 may determine that the one-step report is to be used.
In some embodiments, the terminal device 110 may determine whether the one-step  or two-step report is to be used based on availability of a UL resource for the UEI beam reporting. In some embodiments, the availability of the UL resource may indicate which UL resource is closest (in time) to the event or to the triggered/prepared UEI beam reporting. Alternatively or additionally, the availability of the UL resource may indicate whether the UL resource can accommodate the one-step report.
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used based on capability of the terminal device 110 for the one-step or two-step report (e.g., whether the terminal device 110 supports the one-step or two-step report) .
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used based on an indication of the one-step or two-step report from the network device 120.
It is to be understood that the selection of the one-step or two-step report may be based on any combinations of the above selection manners or any other suitable selection manners.
Continuing to refer to FIG. 2, for the UEI beam reporting, the terminal device 110 may determine 250, at least based on the event, the first information associated with the reporting (i.e., the UEI beam reporting) of the set of measurement results. In some embodiments, the first information may comprise at least one of the first spatial filter, the first repetition number, or the first transmission power. It is to be understood that the first information may be used for any of the one-step report, the first-step report of the two-step report or the second-step of the two-step report.
In some embodiments, if the event comprises the first measurement result associated with the first DL RS resource related to the applied TCI state becomes worse, the terminal device 110 may determine the first spatial filter without following the applied TCI state. In other words, if a trigger condition/event is defined as “current beam becomes worse” , an UL beam used for transmitting the UEI beam reporting may be a beam different from the current beam, i.e., not following the applied TCI state or UL TCI state configured/activated/indicated by NW. In some embodiments, the terminal device 110 may determine the first spatial filter based on one of the following: a default TCI state, a TCI state configured with the lowest ID, a TCI state applied for an associated control resource set (CORESET) , a TCI state configured for a PUCCH resource or a PUSCH transmission which can be used to carry the UEI beam  reporting, a TCI state configured for a PUCCH resource with the lowest PUCCH resource ID, a TCI state configured for other component carrier (CC) /bandwidth part (BWP) , etc.
In some embodiments, if the event comprises the second measurement result associated with the second DL RS resource unrelated to the applied TCI state becomes better, the terminal device 110 may determine the first spatial filter by following the applied TCI state. In other words, if a trigger condition/event is defined as “a new beam becomes better” , an UL beam used for transmitting the UEI beam reporting may be the current beam, i.e., following the applied TCI state or UL TCI state configured/activated/indicated by the network device 120.
In some embodiments where the event is based on a measurement result associated with a DL RS resource related to an applied TCI state, if the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a first range, the terminal device 110 may determine the first repetition number to be a first value. If the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a second range, the terminal device 110 may determine the first repetition number to be a second value. It is to be understood that the first or second range or the first or second value may be pre-configured or pre-defined, and the present disclosure does not limit this aspect.
That is, the number of transmissions may depend on the quality of a transmit beam (i.e., first spatial filter) , if the transmit beam is good, a one-time transmission may be sufficient. If the transmit beam is not good, it is considered to use repeated transmissions. For example, it is assumed that RSRP of current beams is used as the trigger condition/event. If RSRP of a current beam corresponding to the transmit beam is lower than or equal to a RSRP threshold, the first repetition number may be determined to be 2. If the RSRP of the current beam corresponding to the transmit beam is higher than the RSRP threshold, the first repetition number may be determined to be 1 (i.e., no repetition) . It is to be understood that more ranges and repetition number values may be used, and the present disclosure is not limited in this regard.
In some embodiments where the event is based on a measurement result associated with a DL RS resource related to an applied TCI state, if the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a third range, the terminal device 110 may determine the first transmission power without using power ramping.  If the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fourth range, the terminal device 110 may determine the first transmission power by applying a first power ramping level. If the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fifth range, the terminal device 110 may determine the first transmission power by applying a second power ramping level. It is to be understood that the third or fourth or fifth range or the first or second power ramping level may be pre-configured or pre-defined, and the present disclosure does not limit this aspect.
That is, whether to use the power ramping for the retransmission may depend on the quality of the transmit beam. For example, it is assumed that RSRP of current beams is used as the trigger condition/event. If RSRP of a current beam corresponding to the transmit beam is within the third range, the power ramping is not used for determination of the first transmission power. If the RSRP of the current beam corresponding to the transmit beam is within the fourth range, the first power ramping level may be used for determination of the first transmission power. If the RSRP of the current beam corresponding to the transmit beam is within the fifth range, the second power ramping level may be used for determination of the first transmission power. As the transmit beam becomes worse, higher power may be needed. For retransmission, a larger power ramping level may be preferred if the RSRP is lower.
In some embodiments, the terminal device 110 may determine the first information based on availability of UL resources. For example, the terminal device 110 may determine the first spatial filter, the first repetition number and/or the first transmission power to be applicable for currently available UL resources.
In some embodiments, the terminal device 110 may determine the first information based on capability of the terminal device 110. For example, the terminal device 110 may determine the first spatial filter, the first repetition number and/or the first transmission power to be within a range supported by the terminal device 110.
In some embodiments, the terminal device 110 may determine the first information based on NW configuration. For example, the terminal device 110 may determine the first spatial filter, the first repetition number and/or the first transmission power based on an explicit indication of the first spatial filter, the first repetition number and/or the first transmission power from the network device 120.
It is to be understood that the terminal device 110 may determine the first information based on any combination of the above determination manners or any other suitable determination manners.
Continuing to refer to FIG. 2, the terminal device 110 may transmit 260, at least based on the first information, the set of measurement results to the network device 120. As such, the UEI beam reporting may be performed. In some embodiments, if the one-step report is to be used for the reporting of the set of measurement results, the terminal device 110 may perform the one-step report based on the first information.
In some embodiments, if the two-step report is to be used for the reporting of the set of measurement results, the terminal device 110 may perform the first-step report of the two-step report based on the first information, and perform the second-step report of the two-step report based on a transmission of the first-step report. In this case, it is assumed that the first-step report is successful, and the second-step report is based on the successful transmission of the first-step report.
In some embodiments, based on the transmission of the first-step report, the terminal device 110 may determine the second information associated with the second-step report. The second information may comprise at least one of the second spatial filter, the second repetition number, or the second transmission power. Then the terminal device 110 may perform the second-step report based on the second information. As such, a chance of successful transmission of the second-step report may be increased.
In some embodiments, the terminal device 110 may determine the second information based on at least one of the following: the first spatial filter for the first-step report, number of transmissions of the first-step report, third information carried in the first-step report, a response to the first-step report from the network device 120, availability of an uplink resource for the reporting, capability of the terminal device 110 for the two-step report, or an indication of the second information from the network device 120. Some example embodiments will be described below.
In some embodiments, the terminal device 110 may determine the second spatial filter based on the first spatial filter for the first-step report. That is, a UL beam used for transmitting the second-step report of the two-step report may be based on the UL beam for the first-step report. In some embodiments, the terminal device 110 may directly determine the first spatial filter as the second spatial filter. In other words, the UL beam used for  transmitting the first-step report and the second-step report of the two-step report may be the same. In some embodiments, if spatial filters are used for transmissions of the first-step report, the terminal device 110 may determine, as the second spatial filter, one of the spatial filters that is used for a last transmission or a successful transmission in the transmissions of the first-step reports. In other words, if different UL beams are used to transmit/retransmit the first-step report, a UL beam used for the last transmission or a UL beam used for the successful transmission may be used for the second-step report.
In some embodiments, the terminal device 110 may determine the second spatial filter based on the third information carried in the first-step report. In some embodiments, the first-step report may carry information of the UL beam used for transmitting the second-step report (i.e., indicate the second spatial filter) . In this case, the terminal device 110 may determine the second spatial filter based on the third information (i.e., the content carried in the first-step report) .
In some embodiments, the terminal device 110 may determine the second spatial filter based on the response to the first-step report from the network device 120. In some embodiments, the response may carry information of the UL beam used for transmitting the second-step report (i.e., indicate the second spatial filter) . In this case, the terminal device 110 may determine the second spatial filter based on the response.
In some embodiments, the terminal device 110 may determine the second spatial filter based on the number of transmissions or retransmissions of the first-step report. In some embodiments, if the number of transmissions or retransmissions of the first-step report is less than or equal to a first number threshold, the terminal device 110 may determine the first spatial filter as the second spatial filter, i.e., the UL beam used for transmitting the first-step report and the second-step report of the two-step report may be the same. In some embodiments, if the number of transmissions of the first-step report is greater than or equal to the first number threshold, the terminal device 110 may determine the second spatial filter to be different from the first spatial filter. That is, the terminal device 110 may not apply the UL beam used for transmitting the first-step report to transmit the second-step report. In some embodiments, the terminal device 110 may determine the first spatial filter based on one of the following: an indicated/activated TCI state applied, a default TCI state, a TCI state configured with the lowest ID, a TCI state applied for an associated CORESET, a TCI state configured for a PUCCH resource or a PUSCH transmission which can be used to carry the UEI beam reporting, a TCI state configured for a PUCCH resource with the lowest PUCCH  resource ID, a TCI state configured for other CC/BWP, etc.
In some embodiments, the terminal device 110 may determine the second repetition number based on the first spatial filter for the first-step report (i.e., based on the UL beam for the first-step report) . In some embodiments, if a measurement result associated with a DL RS resource corresponding to the second spatial filter is within a sixth range, the terminal device 110 may determine the second repetition number as a third value. If the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a seventh range, the terminal device 110 may determine the second repetition number as a fourth value. In other words, the second repetition number may be determined based on quality of the UL beam for the first-step report. It is to be understood that the sixth or seventh range or the third or fourth value may be pre-configured or pre-defined, and the present disclosure is not limited in this regard. It is also to be understood that more ranges and repetition number values may be used.
In some embodiments, the terminal device 110 may determine the second repetition number based on the third information carried in the first-step report. In some embodiments, the first-step report may carry information of the number of repetitions for transmitting the second-step report (i.e., indicate the second repetition number) . In this case, the terminal device 110 may determine the second repetition number based on the third information (i.e., the content carried in the first-step report) .
In some embodiments, the terminal device 110 may determine the second repetition number based on the response to the first-step report from the network device 120. In some embodiments, the response may carry information of the number of repetitions for transmitting the second-step report (i.e., indicate the second repetition number) . In this case, the terminal device 110 may determine the second repetition number based on the response.
In some embodiments, the terminal device 110 may determine the second repetition number based on the number of transmissions or retransmissions of the first-step report. In some embodiments, if the number of transmissions or retransmissions of the first-step report is less than or equal to a second number threshold, the terminal device 110 may determine the first repetition number as a fifth value. In some embodiments, if the number of transmissions of the first-step report is greater than or equal to the second number threshold, the terminal device 110 may determine the second repetition number to be a sixth value. In some embodiments, the sixth value may be larger than the fifth value. It is to be understood  that more ranges and repetition number values may be used.
In some embodiments, the terminal device 110 may determine the second transmission power based on the first spatial filter for the first-step report (i.e., based on the UL beam for the first-step report) . In some embodiments, if a measurement result associated with a DL RS resource corresponding to the second spatial filter is within an eighth range, the terminal device 110 may determine the second transmission power without using power ramping. If the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a ninth range, the terminal device 110 may determine the second transmission power by applying a third power ramping level. If the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a tenth range, the terminal device 110 may determine the second transmission power by applying a fourth power ramping level. In other words, the second transmission power may be determined based on quality of a DL beam corresponding to the UL beam for the first-step report. In some embodiments, a larger power ramping level may be applied for a lower RSRP. It is to be understood that the eighth or ninth or tenth range or the third or fourth power ramping level may be pre-configured or pre-defined, and the present disclosure is not limited in this regard.
In some embodiments, the terminal device 110 may determine the second transmission power based on the response to the first-step report from the network device 120. In some embodiments, the response may carry information of UL transmission power used for transmitting the second-step report (i.e., indicate the second transmission power) . In this case, the terminal device 110 may determine the second transmission power based on the response.
In some embodiments, the terminal device 110 may determine the second transmission power based on the number of transmissions or retransmissions of the first-step report. In some embodiments, if the number of transmissions or retransmissions of the first-step report is within a first number range, the terminal device 110 may determine the second transmission power without using power ramping. If the number of transmissions of the first-step report is within a second number range, the terminal device 110 may determine the second transmission power by applying a fifth power ramping level. If the number of transmissions of the first-step report is within a third number range, the terminal device 110 may determine the second transmission power by applying a sixth power ramping level. It is to be understood that the first or second or third number range or the fifth or sixth power  ramping level may be pre-configured or pre-defined, and the present disclosure is not limited in this regard.
In some embodiments, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power based on availability of UL resources. For example, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power to be applicable for currently available UL resources.
In some embodiments, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power based on capability of the terminal device 110. For example, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power to be within a range supported by the terminal device 110.
In some embodiments, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power based on NW configuration. For example, the terminal device 110 may determine the second spatial filter, the second repetition number and/or the second transmission power based on an explicit indication of the second spatial filter, the second repetition number and/or the second transmission power from the network device 120.
It is to be understood that the terminal device 110 may determine the second information based on any combination of the above determination manners or any other suitable determination manners.
Continuing to refer to FIG. 2, in some embodiments, the terminal device 110 may perform 261 the first-step report and the second-step report of the two-step report for the reporting of the set of measurement results. In some embodiments, the terminal device 110 may perform the first-step and second-step reports based on the first and/or second information. It is to be understood that any other suitable ways may also be feasible.
As shown in FIG. 2, the network device 120 may transmit 262, to the terminal device 110, at least one response to the first-step report and the second-step report. In some embodiments, the network device 120 may respond the first-step report and the second-step report separately. In this case, the second-step report may be based on a successful transmission of the first-step report.
In some embodiments, upon reception of the first-step report, the network device  120 may transmit, to the terminal device 110, a response to the first-step report to indicate a successful reception or a retransmission of the first-step report. In some embodiments, upon reception of the second-step report, the network device 120 may transmit, to the terminal device 110, a further response to the second-step report to indicate a successful reception or a retransmission of the second-step report.
In some embodiments, the network device 120 may respond the first-step report and the second-step report jointly, i.e., the network device 120 may transmit a single response for the first-step report and the second-step report. In this case, the second-step report may not be based on the successful transmission of the first-step report.
In some embodiments, the first-step report and the second-step report may be associated. For example, the first-step report and the second-step report may be separated by X time units. In another example, the first-step report and the second-step report may be transmitted in associated PUCCH/PUSCH resources.
In some embodiments, if a retransmission is needed, the network device 120 may indicate whether to retransmit the first-step report or the second-step report or both. In this way, retransmission efficiency may be improved. In some embodiments, if the retransmission of at least one of the first-step report or the second-step report is needed, the network device 120 may cause the indication of the retransmission of the at least one of the first-step report or the second-step report to be included in the single response. In some embodiments, if retransmissions of both the first-step report and the second-step report are needed, the network device 120 may cause no indication of the retransmissions to be included in the single response by default.
In some embodiments, the single response may comprise information (e.g., UL resource, time, frequency, UL beam, repetition number, and transmission power) of the retransmission of the first-step report, or the second-step report or both. In this way, the retransmission efficiency may be further improved. In some embodiments, the single response may comprise an indication of a switching between the one-step report and the two-step report. In this way, the UEI beam reporting may be achieved in an efficient way.
With reference to FIG. 2, based on the at least one response from the network device 120, the terminal device 110 may perform 263 the retransmission of at least one of the first-step report or the second-step report.
In some embodiments, the at least one response comprises separated responses to  the first-step report and the second-step report. In some embodiments, upon reception of a response to the first-step report indicating a retransmission of the first-step report, the terminal device 110 may retransmit the first-step report. In some embodiments, if the first-step report is successfully received, the terminal device 110 may transmit the second-step report. In some embodiments, upon reception of a further response to the second-step report to indicate a retransmission of the second-step report, the terminal device 110 may retransmit the second-step report.
In some embodiments, the at least one response comprises a single response to the first-step report and the second-step report. In some embodiments, if the single response comprises an indication of the retransmission of the at least one of the first-step report or the second-step report, the terminal device 110 may perform the retransmission based on the indication. In some embodiments, if there is no indication of retransmissions in the single response, the terminal device 110 may retransmit both the first-step report and the second-step report by default.
In some embodiments, if the retransmission of the one-step report is to be performed for the reporting of the set of measurement results, the terminal device 110 may determine a first time duration from a first time point to a second time point of retransmitting the one-step report. In some embodiments, the first time point may comprise a time point of transmitting the latest one-step report. In some embodiments, the first time point may comprise a time point of determining to retransmit the one-step report. In some embodiments, the first time point may comprise a time point of the latest RS measurement.
In some embodiments, the first time duration may be greater than or equal to a first time threshold or a periodicity of RS measurements for the reporting. In this case, the set of measurement results are out-of-date or new measurement results can be obtained. Thus, if the first time duration is greater than or equal to the first time threshold or the periodicity of RS measurements for the reporting, the terminal device 110 may update the set of measurement results, and transmit the updated set of measurement results in the retransmission of the one-step report. As such, the transmission or retransmission of the UEI beam reporting may always be based on the latest RS measurements. Thus, a timely reporting may be provided and out-of-date reporting may be avoided.
For the two-step report, usually the first-step report is an indicator or a notification massage, and the second-step report carries detailed beam information. Thus, the update of  the set of measurement results may be unnecessary for the retransmission of the first-step report, but necessary for the retransmission of the second-step report.
In some embodiments, if the retransmission of the first-step report of the two-step report is to be performed for the reporting of the set of measurement results, the terminal device 110 may not update the set of measurement results. In some embodiments, if the retransmission of the second-step report of the two-step report is to be performed for the reporting of the set of measurement results, the terminal device 110 may determine a second time duration from a third time point to a fourth time point of retransmitting the second-step report. In some embodiments, the third time point may comprise a time point of transmitting the latest first-step or second-step report. In some embodiments, the third time point may comprise a time point of determining to retransmit the second-step report. In some embodiments, the third time point may comprise a time point of the latest RS measurement.
In some embodiments, if the second time duration is greater than or equal to a second time threshold or the periodicity of RS measurements for the reporting, the terminal device 110 may update the set of measurement results, and transmit the updated set of measurement results in the retransmission of the second-step report.
In some embodiments, the terminal device 110 may not update the report contents for the retransmission of the UEI beam reporting.
Continuing to refer to FIG. 2, the terminal device 110 may drop 270 the UEI beam reporting. In some embodiments, upon determination that the retransmission of the second-step report of the two-step report is to be performed for the reporting of the set of measurement results (i.e., the UEI beam reporting) , if number of retransmissions of the second-step report is greater than or equal to a fourth number threshold, the terminal device 110 may cancel the reporting of the set of measurement results. In some embodiments, upon determination that the retransmission of the second-step report of the two-step report is to be performed for the reporting of the set of measurement results (i.e., the UEI beam reporting) , if the second time duration from the third time point to the fourth time point of retransmitting the second-step report is greater than or equal to the second time threshold, the terminal device 110 may cancel the reporting of the set of measurement results.
It is to be understood that the first or second or third time threshold or the fourth number threshold may be pre-configured or pre-defined, and the present disclosure is not  limited in this regard.
So far, the UEI beam reporting according to the present disclosure is described. It is to be understood that operations described in the process 200 may be carried out separately or in any suitable combinations.
EXAMPLE IMPLEMENTATION OF METHODS
Corresponding to the above process, embodiments of the present disclosure provide methods of communication implemented at a terminal device and a network device. These methods will be described below with reference to FIGs. 3 and 4.
FIG. 3 illustrates a flowchart of a method 300 of communication implemented at a terminal device in accordance with some embodiments of the present disclosure. For example, the method 300 may be performed at the terminal device 110 as shown in FIG. 1. For the purpose of discussion, in the following, the method 300 will be described with reference to FIG. 1. It is to be understood that the method 300 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
At block 310, the terminal device 110 may determine that an event triggering a reporting of a set of measurement results is fulfilled. The set of measurement results are associated with a set of DL RS resources.
At block 320, the terminal device 110 may determine, at least based on the event, first information associated with the reporting of the set of measurement results. The first information may comprise at least one of a first spatial filter, a first repetition number, or first transmission power.
In some embodiments, the terminal device 110 may determine the first information by at least one of the following: in accordance with a determination that the event comprises a first measurement result associated with a first DL RS resource related to an applied TCI state becomes worse, determining the first spatial filter without following the applied TCI state; or in accordance with a determination that the event comprises a second measurement result associated with a second DL RS resource unrelated to the applied TCI state becomes better, determining the first spatial filter by following the applied TCI state.
In some embodiments where the event may be based on a measurement result associated with a DL RS resource related to an applied TCI state, the terminal device may  determine the first information by at least one of the following: in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a first range, determining the first repetition number to be a first value; or in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a second range, determining the first repetition number to be a second value.
In some embodiments where the event is based on a measurement result associated with a DL RS resource related to an applied TCI state, the terminal device may determine the first information by at least one of the following: in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a third range, determining the first transmission power without using power ramping; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fourth range, determining the first transmission power by applying a first power ramping level; or in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fifth range, determining the first transmission power by applying a second power ramping level.
At block 330, the terminal device 110 may transmit, to the network device 120, the set of measurement results at least based on the first information.
In some embodiments, the terminal device 110 may transmit the set of measurement results by: in accordance with a determination that a two-step report is to be used for the reporting of the set of measurement results, performing a first-step report of the two-step report based on the first information; and performing a second-step report of the two-step report based on a transmission of the first-step report.
In some embodiments, the terminal device 110 may perform the second-step report by: determining, based on the transmission of the first-step report, second information associated with the second-step report, the second information comprising at least one of a second spatial filter, a second repetition number, or second transmission power; and performing the second-step report based on the second information.
In some embodiments, the terminal device 110 may determine the second information by: determining the second information based on at least one of the following: the first spatial filter for the first-step report, number of transmissions of the first-step report,  third information carried in the first-step report, or a response to the first-step report from the network device.
In some embodiments, the terminal device 110 may determine the second information by at least one of the following: determining the first spatial filter as the second spatial filter; in accordance with a determination that spatial filters are used for transmissions of the first-step report, determining, as the second spatial filter, one of the spatial filters that is used for a last transmission or a successful transmission in the transmissions of the first-step reports; in accordance with a determination that the third information indicates the second spatial filter, determining the second spatial filter based on the third information; in accordance with a determination that the response indicates the second spatial filter, determining the second spatial filter based on the response; in accordance with a determination that the number of transmissions of the first-step report is less than or equal to a first number threshold, determining the first spatial filter as the second spatial filter; or in accordance with a determination that the number of transmissions of the first-step report is greater than the first number threshold, determining the second spatial filter different from the first spatial filter.
In some embodiments, the terminal device 110 may determine the second information by at least one of the following: in accordance with a determination that a measurement result associated with a DL RS resource corresponding to the second spatial filter is within a sixth range, determining the second repetition number as a third value; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a seventh range, determining the second repetition number as a fourth value; in accordance with a determination that the third information indicates the second repetition number, determining the second repetition number based on the third information; in accordance with a determination that the response indicates the second repetition number, determining the second repetition number based on the response; in accordance with a determination that the number of transmissions of the first-step report is less than or equal to a second number threshold, determining the second repetition number to be a fifth value; or in accordance with a determination that the number of transmissions of the first-step report is greater than the second number threshold, determining the second repetition number to be a sixth value.
In some embodiments, the terminal device 110 may determine the second information by at least one of the following: in accordance with a determination that a  measurement result associated with a DL RS resource corresponding to the second spatial filter is within an eighth range, determining the second transmission power without using power ramping; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a ninth range, determining the second transmission power by applying a third power ramping level; in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a tenth range, determining the second transmission power by applying a fourth power ramping level; in accordance with a determination that the response indicates the second transmission power, determining the second transmission power based on the response; in accordance with a determination that the number of transmissions of the first-step report is within a first number range, determining the second transmission power without using power ramping; in accordance with a determination that the number of transmissions of the first-step report is within a second number range, determining the second transmission power by applying a fifth power ramping level; or in accordance with a determination that the number of transmissions of the first-step report is within a third number range, determining the second transmission power by applying a sixth power ramping level.
In some embodiments, the terminal device 110 may be further caused to: determine whether a one-step or two-step report is to be used for the reporting of the set of measurement results based on at least one of the following: a measurement result associated with a DL RS resource, a latest reporting of the set of measurement results, the event triggering the reporting of the set of measurement results, a TCI state configuration, a TCI associated with the first spatial filter, availability of an uplink resource for the reporting, capability of the terminal device for the one-step or two-step report, or an indication of the one-step or two-step report from the network device.
In some embodiments, the terminal device 110 may determine whether the one-step or two-step report is to be used by at least one of the following: in accordance with a determination that the measurement result associated with the DL RS resource is lower than a result threshold, determining that the two-step report is to be used; in accordance with a determination that the measurement result associated with the DL RS resource is higher than the result threshold, determining that the one-step report is to be used; in accordance with a determination that the latest reporting is a one-step report and is unsuccessful, determining that the two-step report is to be used; in accordance with a determination that number of  transmissions associated with the latest reporting is greater than a third number threshold, determining that the two-step report is to be used; in accordance with a determination that the event comprises a first measurement result associated with a first DL RS resource related to an applied TCI state becomes worse, determining that the two-step report is to be used; in accordance with a determination that the event comprises a second measurement result associated with a second DL RS resource unrelated to the applied TCI state becomes better, determining that the one-step report is to be used; in accordance with a determination that the TCI state configuration indicates a joint TCI state is used for both downlink and uplink, determining that the two-step report is to be used; in accordance with a determination that the TCI state configuration indicates separated TCI states are used for downlink and uplink, determining that the one-step report is to be used; in accordance with a determination that the TCI associated with the first spatial filter is not associated with a first cell with a PCI different from a PCI of a serving cell, determining that the two-step report is to be used; or in accordance with a determination that the TCI of the first spatial filter is associated with the first cell, determining that the one-step report is to be used.
In some embodiments, the terminal device 110 may transmit the set of measurement results by: performing a first-step report and a second-step report of a two-step report for the reporting of the set of measurement results; receiving, from the network device, at least one response to the first-step report and the second-step report; and performing, based on the at least one response, a retransmission of at least one of the first-step report or the second-step report.
In some embodiments where the at least one response comprises a single response, the terminal device 110 may perform the retransmission by: in accordance with a determination that the single response comprises an indication of the retransmission of the at least one of the first-step report or the second-step report, performing the retransmission based on the indication; and in accordance with a determination that the single response does not comprise the indication of the retransmission, performing retransmissions of both the first-step report and the second-step report.
In some embodiments, the terminal device 110 may be further caused to: in accordance with a determination that a retransmission of a one-step report is to be performed for the reporting of the set of measurement results, determine a first time duration from a first time point to a second time point of retransmitting the one-step report, the first time point comprising a time point of transmitting a latest one-step report, a time point of determining  to retransmit the one-step report, or a time point of a latest RS measurement; in accordance with a determination that the first time duration is greater than a first time threshold or a periodicity of RS measurements for the reporting, update the set of measurement results; and transmit the updated set of measurement results in the retransmission of the one-step report.
In some embodiments, the terminal device 110 may be further caused to: in accordance with a determination that a retransmission of a first-step report of a two-step report is to be performed for the reporting of the set of measurement results, perform no update on the set of measurement results; in accordance with a determination that a retransmission of a second-step report of the two-step report is to be performed for the reporting of the set of measurement results, determine a second time duration from a third time point to a fourth time point of retransmitting the second-step report, the third time point comprising a time point of transmitting a latest first-step or second-step report, a time point of determining to retransmit the second-step report, or a time point of a latest RS measurement; in accordance with a determination that the second time duration is greater than a second time threshold or a periodicity of RS measurements for the reporting, update the set of measurement results; and transmit the updated set of measurement results in the retransmission of the second-step report.
In some embodiments, the terminal device 110 may be further caused to: determine that a retransmission of a second-step report of the two-step report is to be performed for the reporting of the set of measurement results; and cancel the reporting of the set of measurement results based on at least one of the following: number of retransmissions of the second-step report is greater than a fourth number threshold, or a second time duration from a third time point to a fourth time point of retransmitting the second-step report is greater than a second time threshold, the third time point comprising a time point of transmitting a latest first-step or second-step report, a time point of determining to retransmit the second-step report, or a time point of a latest RS measurement.
In some embodiments, the terminal device 110 may be further caused to: transmit, to the network device 120, capability information of the terminal device 110 indicating at least one of the following: whether the terminal device 110 supports a one-step or two-step report for the reporting of the set of measurement results; one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report; whether the terminal device 110 supports a repetition based transmission for the reporting of the set of measurement results; whether  the terminal device 110 supports a retransmission for the reporting of the set of measurement results; whether the terminal device 110 supports a determination of the first information based on the event; or whether the terminal device 110 supports a determination of second information associated with the second-step report based on a transmission of the first-step report.
With the method 300, a UEI beam reporting may be carried out.
FIG. 4 illustrates a flowchart of a method 400 of communication implemented at a network device in accordance with some embodiments of the present disclosure. For example, the method 400 may be performed at the network device 120 as shown in FIG. 1. For the purpose of discussion, in the following, the method 400 will be described with reference to FIG. 1. It is to be understood that the method 400 may include additional blocks not shown and/or may omit some blocks as shown, and the scope of the present disclosure is not limited in this regard.
At block 410, the network device 120 may receive, from the terminal device 110, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources.
At block 420, the network device 120 may transmit, to the terminal device 110, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
In some embodiments where the at least one response may comprise a single response, the network device 120 may transmit the single response by: in accordance with a determination that the retransmission of the at least one of the first-step report or the second-step report is needed, causing the indication of the retransmission of the at least one of the first-step report or the second-step report to be included in the single response; or in accordance with a determination that retransmissions of both the first-step report and the second-step report are needed, causing no indication of the retransmissions to be included in the single response.
In some embodiments, the network device 120 may be further caused to: receive, from the terminal device 110, capability information of the terminal device 110 indicating at least one of the following: whether the terminal device 110 supports a one-step or two-step report for the reporting of the set of measurement results; one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step  report or a second-step report of the two-step report; whether the terminal device 110 supports a repetition based transmission for the reporting of the set of measurement results; whether the terminal device 110 supports a retransmission for the reporting of the set of measurement results; whether the terminal device 110 supports a determination of the first information based on the event; or whether the terminal device 110 supports a determination of second information associated with the second-step report based on a transmission of the first-step report.
With the method 400, a UEI beam reporting may be facilitated. It is to be understood that operations of the methods 300 and 400 correspond to that described in connection with FIG. 2, and other details are omitted here for conciseness.
EXAMPLE IMPLEMENTATION OF DEVICES
FIG. 5 is a simplified block diagram of a device 500 that is suitable for implementing embodiments of the present disclosure. The device 500 can be considered as a further example implementation of the terminal device 110 or the network device 120 as shown in FIG. 1. Accordingly, the device 500 can be implemented at or as at least a part of the terminal device 110 or the network device 120.
As shown, the device 500 includes a processor 510, a memory 520 coupled to the processor 510, a suitable transceiver 540 coupled to the processor 510, and a communication interface coupled to the transceiver 540. The memory 510 stores at least a part of a program 530. The transceiver 540 may be for bidirectional communications or a unidirectional communication based on requirements. The transceiver 540 may include at least one of a transmitter 542 or a receiver 544. The transmitter 542 and the receiver 544 may be functional modules or physical entities. The transceiver 540 has at least one antenna to facilitate communication, though in practice an Access Node mentioned in this application may have several ones. The communication interface may represent any interface that is necessary for communication with other network elements, such as X2/Xn interface for bidirectional communications between eNBs/gNBs, S1/NG interface for communication between a mobility management entity (MME) /access and mobility management function (AMF) /SGW/UPF and the eNB/gNB, Un interface for communication between the eNB/gNB and a relay node (RN) , or Uu interface for communication between the eNB/gNB and a terminal device.
The program 530 is assumed to include program instructions that, when executed  by the associated processor 510, enable the device 500 to operate in accordance with the embodiments of the present disclosure, as discussed herein with reference to FIGs. 1 to 4. The embodiments herein may be implemented by computer software executable by the processor 510 of the device 500, or by hardware, or by a combination of software and hardware. The processor 510 may be configured to implement various embodiments of the present disclosure. Furthermore, a combination of the processor 510 and memory 520 may form processing means 550 adapted to implement various embodiments of the present disclosure.
The memory 520 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 520 is shown in the device 500, there may be several physically distinct memory modules in the device 500. The processor 510 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples. The device 500 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
In some embodiments, a terminal device comprises a circuitry configured to: determine that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of DL RS resources; determine, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and transmit, to a network device, the set of measurement results at least based on the first information.
In some embodiments, a network device comprises a circuitry configured to: receive, from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of DL RS resources; and transmit, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
The term ‘circuitry’ used herein may refer to hardware circuits and/or combinations of hardware circuits and software. For example, the circuitry may be a combination of analog and/or digital hardware circuits with software/firmware. As a further example, the circuitry may be any portions of hardware processors with software including digital signal processor (s) , software, and memory (ies) that work together to cause an apparatus, such as a terminal device or a network device, to perform various functions. In a still further example, the circuitry may be hardware circuits and or processors, such as a microprocessor or a portion of a microprocessor, that requires software/firmware for operation, but the software may not be present when it is not needed for operation. As used herein, the term circuitry also covers an implementation of merely a hardware circuit or processor (s) or a portion of a hardware circuit or processor (s) and its (or their) accompanying software and/or firmware.
Generally, various embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representation, it will be appreciated that the blocks, apparatus, systems, techniques or methods described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
The present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium. The computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the process or method as described above with reference to FIGs. 1 to 4. Generally, program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types. The functionality of the program modules may be combined or split between program modules as desired in various embodiments. Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
Program code for carrying out methods of the present disclosure may be written in  any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented. The program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
The above program code may be embodied on a machine readable medium, which may be any tangible medium that may contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device. The machine readable medium may be a machine readable signal medium or a machine readable storage medium. A machine readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing. More specific examples of the machine readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Further, while operations are depicted in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Likewise, while several specific implementation details are contained in the above discussions, these should not be construed as limitations on the scope of the present disclosure, but rather as descriptions of features that may be specific to particular embodiments. Certain features that are described in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination.
Although the present disclosure has been described in language specific to structural features and/or methodological acts, it is to be understood that the present disclosure defined in the appended claims is not necessarily limited to the specific features or acts described  above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims.

Claims (23)

  1. A terminal device, comprising:
    a processor configured to cause the terminal device to:
    determine that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of downlink (DL) reference signal (RS) resources;
    determine, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and
    transmit, to a network device, the set of measurement results at least based on the first information.
  2. The terminal device of claim 1, wherein the terminal device is caused to determine the first information by at least one of the following:
    in accordance with a determination that the event comprises a first measurement result associated with a first DL RS resource related to an applied transmission configuration indication (TCI) state becomes worse, determining the first spatial filter without following the applied TCI state; or
    in accordance with a determination that the event comprises a second measurement result associated with a second DL RS resource unrelated to the applied TCI state becomes better, determining the first spatial filter by following the applied TCI state.
  3. The terminal device of claim 1, wherein the event is based on a measurement result associated with a DL RS resource related to an applied transmission configuration indication (TCI) state, and the terminal device is caused to determine the first information by at least one of the following:
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a first range, determining the first repetition number to be a first value; or
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a second range, determining the first repetition number to be a second value.
  4. The terminal device of claim 1, wherein the event is based on a measurement result associated with a DL RS resource related to an applied transmission configuration indication (TCI) state, and the terminal device is caused to determine the first information by at least one of the following:
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a third range, determining the first transmission power without using power ramping;
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fourth range, determining the first transmission power by applying a first power ramping level; or
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the first spatial filter is within a fifth range, determining the first transmission power by applying a second power ramping level.
  5. The terminal device of claim 1, wherein the terminal device is caused to transmit the set of measurement results by:
    in accordance with a determination that a two-step report is to be used for the reporting of the set of measurement results, performing a first-step report of the two-step report based on the first information; and
    performing a second-step report of the two-step report based on a transmission of the first-step report.
  6. The terminal device of claim 5, wherein the terminal device is caused to perform the second-step report by:
    determining, based on the transmission of the first-step report, second information associated with the second-step report, the second information comprising at least one of a second spatial filter, a second repetition number, or second transmission power; and
    performing the second-step report based on the second information.
  7. The terminal device of claim 6, wherein the terminal device is caused to determine the second information by:
    determining the second information based on at least one of the following:
    the first spatial filter for the first-step report,
    number of transmissions of the first-step report,
    third information carried in the first-step report, or
    a response to the first-step report from the network device.
  8. The terminal device of claim 7, wherein the terminal device is caused to determine the second information by at least one of the following:
    determining the first spatial filter as the second spatial filter;
    in accordance with a determination that spatial filters are used for transmissions of the first-step report, determining, as the second spatial filter, one of the spatial filters that is used for a last transmission or a successful transmission in the transmissions of the first-step reports;
    in accordance with a determination that the third information indicates the second spatial filter, determining the second spatial filter based on the third information;
    in accordance with a determination that the response indicates the second spatial filter, determining the second spatial filter based on the response;
    in accordance with a determination that the number of transmissions of the first-step report is less than or equal to a first number threshold, determining the first spatial filter as the second spatial filter; or
    in accordance with a determination that the number of transmissions of the first-step report is greater than the first number threshold, determining the second spatial filter different from the first spatial filter.
  9. The terminal device of claim 7, wherein the terminal device is caused to determine the second information by at least one of the following:
    in accordance with a determination that a measurement result associated with a DL RS resource corresponding to the second spatial filter is within a sixth range, determining the second repetition number as a third value;
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a seventh range, determining the second repetition number as a fourth value;
    in accordance with a determination that the third information indicates the second repetition number, determining the second repetition number based on the third information;
    in accordance with a determination that the response indicates the second repetition number, determining the second repetition number based on the response;
    in accordance with a determination that the number of transmissions of the first-step  report is less than or equal to a second number threshold, determining the second repetition number to be a fifth value; or
    in accordance with a determination that the number of transmissions of the first-step report is greater than the second number threshold, determining the second repetition number to be a sixth value.
  10. The terminal device of claim 7, wherein the terminal device is caused to determine the second information by at least one of the following:
    in accordance with a determination that a measurement result associated with a DL RS resource corresponding to the second spatial filter is within an eighth range, determining the second transmission power without using power ramping;
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a ninth range, determining the second transmission power by applying a third power ramping level;
    in accordance with a determination that the measurement result associated with the DL RS resource corresponding to the second spatial filter is within a tenth range, determining the second transmission power by applying a fourth power ramping level;
    in accordance with a determination that the response indicates the second transmission power, determining the second transmission power based on the response;
    in accordance with a determination that the number of transmissions of the first-step report is within a first number range, determining the second transmission power without using power ramping;
    in accordance with a determination that the number of transmissions of the first-step report is within a second number range, determining the second transmission power by applying a fifth power ramping level; or
    in accordance with a determination that the number of transmissions of the first-step report is within a third number range, determining the second transmission power by applying a sixth power ramping level.
  11. The terminal device of claim 1, wherein the terminal device is further caused to:
    determine whether a one-step or two-step report is to be used for the reporting of the set of measurement results based on at least one of the following:
    a measurement result associated with a DL RS resource,
    a latest reporting of the set of measurement results,
    the event triggering the reporting of the set of measurement results,
    a transmission configuration indication (TCI) state configuration,
    a TCI associated with the first spatial filter,
    availability of an uplink resource for the reporting,
    capability of the terminal device for the one-step or two-step report, or
    an indication of the one-step or two-step report from the network device.
  12. The terminal device of claim 11, wherein the terminal device is caused to determine whether the one-step or two-step report is to be used by at least one of the following:
    in accordance with a determination that the measurement result associated with the DL RS resource is lower than a result threshold, determining that the two-step report is to be used;
    in accordance with a determination that the measurement result associated with the DL RS resource is higher than the result threshold, determining that the one-step report is to be used;
    in accordance with a determination that the latest reporting is a one-step report and is unsuccessful, determining that the two-step report is to be used;
    in accordance with a determination that number of transmissions associated with the latest reporting is greater than a third number threshold, determining that the two-step report is to be used;
    in accordance with a determination that the event comprises a first measurement result associated with a first DL RS resource related to an applied TCI state becomes worse, determining that the two-step report is to be used;
    in accordance with a determination that the event comprises a second measurement result associated with a second DL RS resource unrelated to the applied TCI state becomes better, determining that the one-step report is to be used;
    in accordance with a determination that the TCI state configuration indicates a joint TCI state is used for both downlink and uplink, determining that the two-step report is to be used;
    in accordance with a determination that the TCI state configuration indicates separated TCI states are used for downlink and uplink, determining that the one-step report is to be used;
    in accordance with a determination that the TCI associated with the first spatial filter is not associated with a first cell with a physical cell identity (PCI) different from a PCI of a serving cell, determining that the two-step report is to be used; or
    in accordance with a determination that the TCI of the first spatial filter is associated  with the first cell, determining that the one-step report is to be used.
  13. The terminal device of claim 1, wherein the terminal device is caused to transmit the set of measurement results by:
    performing a first-step report and a second-step report of a two-step report for the reporting of the set of measurement results;
    receiving, from the network device, at least one response to the first-step report and the second-step report; and
    performing, based on the at least one response, a retransmission of at least one of the first-step report or the second-step report.
  14. The terminal device of claim 13, wherein the at least one response comprises a single response, and the terminal device is caused to perform the retransmission by:
    in accordance with a determination that the single response comprises an indication of the retransmission of the at least one of the first-step report or the second-step report, performing the retransmission based on the indication; and
    in accordance with a determination that the single response does not comprise the indication of the retransmission, performing retransmissions of both the first-step report and the second-step report.
  15. The terminal device of claim 1, wherein the terminal device is further caused to:
    in accordance with a determination that a retransmission of a one-step report is to be performed for the reporting of the set of measurement results, determine a first time duration from a first time point to a second time point of retransmitting the one-step report, the first time point comprising a time point of transmitting a latest one-step report, a time point of determining to retransmit the one-step report, or a time point of a latest RS measurement;
    in accordance with a determination that the first time duration is greater than a first time threshold or a periodicity of RS measurements for the reporting, update the set of measurement results; and
    transmit the updated set of measurement results in the retransmission of the one-step report.
  16. The terminal device of claim 1, wherein the terminal device is further caused to:
    in accordance with a determination that a retransmission of a first-step report of a two- step report is to be performed for the reporting of the set of measurement results, perform no update on the set of measurement results;
    in accordance with a determination that a retransmission of a second-step report of the two-step report is to be performed for the reporting of the set of measurement results, determine a second time duration from a third time point to a fourth time point of retransmitting the second-step report, the third time point comprising a time point of transmitting a latest first-step or second-step report, a time point of determining to retransmit the second-step report, or a time point of a latest RS measurement;
    in accordance with a determination that the second time duration is greater than a second time threshold or a periodicity of RS measurements for the reporting, update the set of measurement results; and
    transmit the updated set of measurement results in the retransmission of the second-step report.
  17. The terminal device of claim 1, wherein the terminal device is further caused to:
    determine that a retransmission of a second-step report of the two-step report is to be performed for the reporting of the set of measurement results; and
    cancel the reporting of the set of measurement results based on at least one of the following:
    number of retransmissions of the second-step report is greater than a fourth number threshold; or
    a second time duration from a third time point to a fourth time point of retransmitting the second-step report is greater than a second time threshold, the third time point comprising a time point of transmitting a latest first-step or second-step report, a time point of determining to retransmit the second-step report, or a time point of a latest RS measurement.
  18. The terminal device of claim 1, wherein the terminal device is further caused to:
    transmit, to the network device, capability information of the terminal device indicating at least one of the following:
    whether the terminal device supports a one-step or two-step report for the reporting of the set of measurement results;
    one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step  report;
    whether the terminal device supports a repetition based transmission for the reporting of the set of measurement results;
    whether the terminal device supports a retransmission for the reporting of the set of measurement results;
    whether the terminal device supports a determination of the first information based on the event; or
    whether the terminal device supports a determination of second information associated with the second-step report based on a transmission of the first-step report.
  19. A network device, comprising:
    a processor configured to cause the network device to:
    receive, from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of downlink (DL) reference signal (RS) resources; and
    transmit, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
  20. The network device of claim 19, wherein the at least one response comprises a single response, and the network device is caused to transmit the single response by:
    in accordance with a determination that the retransmission of the at least one of the first-step report or the second-step report is needed, causing the indication of the retransmission of the at least one of the first-step report or the second-step report to be included in the single response; or
    in accordance with a determination that retransmissions of both the first-step report and the second-step report are needed, causing no indication of the retransmissions to be included in the single response.
  21. The network device of claim 19, wherein the network device is further caused to:
    receive, from the terminal device, capability information of the terminal device indicating at least one of the following:
    whether the terminal device supports a one-step or two-step report for the reporting of the set of measurement results;
    one or more supported types of channels or resources for at least one of the one-step report, a first-step report of the two-step report or a second-step report of the two-step report;
    whether the terminal device supports a repetition based transmission for the reporting of the set of measurement results;
    whether the terminal device supports a retransmission for the reporting of the set of measurement results;
    whether the terminal device supports a determination of the first information based on the event; or
    whether the terminal device supports a determination of second information associated with the second-step report based on a transmission of the first-step report.
  22. A method of communication, comprising:
    determining, at a terminal device, that an event triggering a reporting of a set of measurement results is fulfilled, the set of measurement results being associated with a set of downlink (DL) reference signal (RS) resources;
    determining, at least based on the event, first information associated with the reporting of the set of measurement results, the first information comprising at least one of a first spatial filter, a first repetition number, or first transmission power; and
    transmitting, to a network device, the set of measurement results at least based on the first information.
  23. A method of communication, comprising:
    receiving, at a network device and from a terminal device, a first-step report and a second-step report of a two-step report for reporting a set of measurement results associated with a set of downlink (DL) reference signal (RS) resources; and
    transmitting, to the terminal device, at least one response to the first-step report and the second-step report comprising an indication of a retransmission of at least one of the first-step report or the second-step report.
PCT/CN2024/083901 2024-03-26 2024-03-26 Devices and methods of communication Pending WO2025199763A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114128170A (en) * 2019-07-17 2022-03-01 三星电子株式会社 Method and apparatus for triggering multi-beam report
WO2023050139A1 (en) * 2021-09-29 2023-04-06 Qualcomm Incorporated Beam reporting for inter-cell beam management
WO2023077454A1 (en) * 2021-11-05 2023-05-11 Nec Corporation Methods, devices, and medium for communication
US20240056247A1 (en) * 2021-01-14 2024-02-15 Telefonaktiebolaget Lm Ericsson (Publ) Enhancements for Beam Group Reporting in Multi-TRP Scenarios

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114128170A (en) * 2019-07-17 2022-03-01 三星电子株式会社 Method and apparatus for triggering multi-beam report
US20240056247A1 (en) * 2021-01-14 2024-02-15 Telefonaktiebolaget Lm Ericsson (Publ) Enhancements for Beam Group Reporting in Multi-TRP Scenarios
WO2023050139A1 (en) * 2021-09-29 2023-04-06 Qualcomm Incorporated Beam reporting for inter-cell beam management
WO2023077454A1 (en) * 2021-11-05 2023-05-11 Nec Corporation Methods, devices, and medium for communication

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