WO2021159424A1 - Methods and apparatuses for controlling csi-rs measurement - Google Patents

Methods and apparatuses for controlling csi-rs measurement Download PDF

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Publication number
WO2021159424A1
WO2021159424A1 PCT/CN2020/075173 CN2020075173W WO2021159424A1 WO 2021159424 A1 WO2021159424 A1 WO 2021159424A1 CN 2020075173 W CN2020075173 W CN 2020075173W WO 2021159424 A1 WO2021159424 A1 WO 2021159424A1
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WO
WIPO (PCT)
Prior art keywords
threshold
serving cell
rsrp
csi
measurement
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PCT/CN2020/075173
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English (en)
French (fr)
Inventor
Lars Dalsgaard
Lei Du
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Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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.)
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Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2020/075173 priority Critical patent/WO2021159424A1/en
Priority to CN202110183078.1A priority patent/CN113271605B/zh
Publication of WO2021159424A1 publication Critical patent/WO2021159424A1/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837—Determination of triggering parameters for hand-off
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • 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
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/0085—Hand-off measurements
    • H04W36/0094—Definition of hand-off measurement parameters

Definitions

  • CSI-RS Channel State Indication Reference Signal
  • CSI-RS is configurable for a mobile device or user equipment (UE) in a connected mode, and may be provided in a UE dedicated configuration, for example by using Radio Resource Control (RRC) signaling.
  • RRC Radio Resource Control
  • configuring the UE to perform CSI-RS measurements from a target cell may enable a direct handover (HO) from a serving beam in a serving cell to a refined beam in the target cell.
  • HO direct handover
  • a method comprising receiving at least one signaling including at least one threshold based on Synchronization Signal Block (SSB) , receiving at least one reference signal based on SSB, and performing conditionally a Channel State Indication Reference Signal (CSI-RS) measurement on at least one of a serving cell or a non-serving cell according to the at least threshold and a receiving power for the at least one reference signal based on SSB (SS-RSRP) on the serving cell.
  • SS-RSRP Channel State Indication Reference Signal
  • this method may be performed in a mobile device or UE.
  • the CSI-RS measurement may be a CSI-RS measurement for Layer 3 (L3) Radio Resource Management (RRM) .
  • L3 Layer 3
  • RRM Radio Resource Management
  • the at least one threshold may include a threshold available for controlling whether to measure an SS-RSRP on the non-serving cells, and the CSI-RS measurement on at least one of the serving cell or the non-serving cells may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the threshold.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the CSI-RS measurement on at least one of the serving cells or the non-serving cells may be not performed if the SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a threshold different from another threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the threshold.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a first threshold and a second threshold, at least one of the first threshold or the second threshold being different from a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, the CSI-RS measurement on the serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the first threshold, and the CSI-RS measurement on the non-serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the second threshold.
  • the first threshold condition may include the SS-RSRP on the serving cell being lower than the first threshold
  • the second threshold condition may include the SS-RSRP on the serving cell being lower than the second threshold.
  • the CSI-RS measurement on the serving cell may be not performed if the SS-RSRP on the serving cell is above the first threshold
  • the CSI-RS measurement on the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the second threshold.
  • the at least one signaling may include a first signaling including a first threshold, and a second signaling including a second threshold.
  • the at least one signaling may include one signaling including the at least one threshold.
  • a method comprising transmitting at least one signaling including at least one threshold based on SSB, and transmitting at least one reference signal based on SSB, wherein the at least threshold and a receiving power for the at least one reference signal based on SSB (SS-RSRP) on the serving cell may be used for performing conditionally a CSI-RS measurement on at least one of a serving cell or a non-serving cell.
  • this method may be performed in an access network, for example in a base station.
  • the CSI-RS measurement may be a CSI-RS measurement for L3 RRM.
  • the at least one threshold may include a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the threshold may be associated with a threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed ifthe SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a threshold different from another threshold available for controlling whether to measure an SS-RSRP on the non-serving cell
  • the threshold may be associated with a threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a first threshold and a second threshold, at least one of the first threshold or the second threshold being different from a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell
  • the first threshold may be associated with a first threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on the serving cell
  • the second threshold may be associated with a second threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on the non-serving cell.
  • the first threshold condition may include the SS-RSRP on the serving cell being lower than the first threshold
  • the second threshold condition may include the SS-RSRP on the serving cell being lower than the second threshold.
  • the CSI-RS measurement on the serving cell may be not performed ifthe SS-RSRP on the serving cell is above the first threshold, and the CSI-RS measurement on the non-serving cell may be not performed ifthe SS-RSRP on the serving cell is above the second threshold.
  • the at least one signaling may include a first signaling including a first threshold, and a second signaling including a second threshold.
  • the at least one signaling may include one signaling including the at least one threshold.
  • an apparatus comprising means for receiving at least one signaling including at least one threshold based on SSB, means for receiving at least one reference signal based on SSB, and means for performing conditionally a CSI-RS measurement on at least one of a serving cell or a non-serving cell according to the at least threshold and a receiving power for the at least one reference signal based on SSB (SS-RSRP) on the serving cell.
  • this apparatus may be at least a part of mobile device or UE.
  • the CSI-RS measurement may be a CSI-RS measurement for L3 RRM.
  • the at least one threshold may include a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the threshold.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a threshold different from another threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the threshold.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a first threshold and a second threshold, at least one of the first threshold or the second threshold being different from a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, the CSI-RS measurement on the serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the first threshold, and the CSI-RS measurement on the non-serving cell may be performed in a case where the SS-RSRP on the serving cell satisfies a threshold condition associated with the second threshold.
  • the first threshold condition may include the SS-RSRP on the serving cell being lower than the first threshold
  • the second threshold condition may include the SS-RSRP on the serving cell being lower than the second threshold.
  • the CSI-RS measurement on the serving cell may be not performed if the SS-RSRP on the serving cell is above the first threshold
  • the CSI-RS measurement on the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the second threshold.
  • the at least one signaling may include a first signaling including a first threshold, and a second signaling including a second threshold.
  • the at least one signaling may include one signaling including the at least one threshold.
  • an apparatus comprising means for transmitting at least one signaling including at least one threshold based on SSB, and means for transmitting at least one reference signal based on SSB, wherein the at least threshold and a receiving power for the at least one reference signal based on SSB (SS-RSRP) on the serving cell may be used for performing conditionally a CSI-RS measurement on at least one of a serving cell or a non-serving cell.
  • this apparatus may be at least a part of an access network, for example at least a part of a base station.
  • the CSI-RS measurement may be a CSI-RS measurement for L3 RRM.
  • the at least one threshold may include a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the threshold may be associated with a threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed ifthe SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a threshold different from another threshold available for controlling whether to measure an SS-RSRP on the non-serving cell
  • the threshold may be associated with a threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • the threshold condition may include the SS-RSRP on the serving cell being lower than the threshold.
  • the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be not performed if the SS-RSRP on the serving cell is above the threshold.
  • the at least one threshold may include a first threshold and a second threshold, at least one of the first threshold or the second threshold being different from a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell
  • the first threshold may be associated with a first threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on the serving cell
  • the second threshold may be associated with a second threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on the non-serving cell.
  • the first threshold condition may include the SS-RSRP on the serving cell being lower than the first threshold
  • the second threshold condition may include the SS-RSRP on the serving cell being lower than the second threshold.
  • the CSI-RS measurement on the serving cell may be not performed ifthe SS-RSRP on the serving cell is above the first threshold, and the CSI-RS measurement on the non-serving cell may be not performed ifthe SS-RSRP on the serving cell is above the second threshold.
  • the at least one signaling may include a first signaling including a first threshold, and a second signaling including a second threshold.
  • the at least one signaling may include one signaling including the at least one threshold.
  • an apparatus comprising at least one processor and at least one memory.
  • the at least one memory may include computer program code, and the at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus to perform any method in the above first aspect.
  • this apparatus may be at least a part of mobile device or UE.
  • the CSI-RS measurement may be a CSI-RS measurement for L3 RRM.
  • an apparatus comprising at least one processor and at least one memory.
  • the at least one memory may include computer program code, and the at least one memory and the computer program code may be configured to, with the at least one processor, cause the apparatus to perform any method in the above second aspect.
  • this apparatus may be at least apart ofan access network, for example at least a part of a base station.
  • the CSI-RS measurement may be a CSI-RS measurement for L3 RRM.
  • a seventh aspect also disclosed is a computer readable medium comprising program instructions for causing an apparatus to perform at least any method in the above first aspect.
  • a computer readable medium comprising program instructions for causing an apparatus to perform at least any method in the above second aspect.
  • FIG. 1 illustrates an example method 100 for controlling CSI-RS measurement in an example embodiment.
  • FIG. 2 illustrates an example method 200 for controlling CSI-RS measurement in an example embodiment.
  • FIG. 3 illustrates an example execution sequence 300 between the example methods 100 and 200 in an example embodiment.
  • FIG. 4 illustrates an example of signaling in an example embodiment.
  • FIG. 5 illustrates an example of signaling in an example embodiment.
  • FIG. 6 illustrates an example of signaling in an example embodiment.
  • FIG. 7 illustrates an example of signaling in an example embodiment.
  • FIG. 8 illustrates an example method 800 for controlling CSI-RS measurement in an example embodiment.
  • FIG. 9 illustrates an example method 900 for controlling CSI-RS measurement in an example embodiment.
  • FIG. 10 illustrates an example method 1000 for controlling CSI-RS measurement in an example embodiment.
  • FIG. 11 illustrates an example method 1100 for controlling CSI-RS measurement in an example embodiment.
  • Configuring the UE to perform CSI-RS measurements from a target cell may enable a direct handover (HO) from a serving beam in a serving cell to a refined beam in the target cell, which, on the other hand, may bring an overhead in downlink Reference Signal (RS) signaling.
  • HO direct handover
  • RS downlink Reference Signal
  • additional CSI-RS measurements on the serving cell and/or a non-serving cell may impact the UE, for example in terms of potential additional measurements time, additional RS processing and post-processing, evaluation and possible report, and so on, which may, for example, increase the UE on-time and measurement burden, and further impact an overall UE power consumption and thereby user experience.
  • FIG. 1 illustrated an example method 100 for controlling CSI-RS measurement, for example, a CSI-RS measurement for L3 RRM.
  • the example method 100 may include a step 110 for receiving at least one signaling including at least one threshold based on Synchronization Signal Block (SSB) , a step 120 for receiving at least one reference signal based on SSB, and a step 130 for performing conditionally the CSI-RS measurement on at least one of a serving cell or a non-serving cell according to the at least threshold and a receiving power for the at least one reference signal based on SSB (hereafter shortened as “SS-RSRP” ) on the serving cell.
  • SS-RSRP Synchronization Signal Block
  • the CSI-RS measurement on the serving cell and/or the non-serving cell may be performed conditionally according to the received at least one SSB based threshold and the SS-RSRP on the serving cell.
  • the CSI-RS measurement on the serving cell, or the CSI-RS measurement on the non-serving cell, or both the CSI-RS measurement on the serving cell and the CSI-RS measurement on the non-serving cell may be not performed if the SS-RSRP on the serving cell is good enough according to the received at least one SSB based threshold, and may be performed otherwise.
  • at least network CSI-RS transmissions and thereby the overall UE power consumption may be reduced.
  • one or more thresholds based on SSB may be used in the example method 100, and one or more signaling may be used to provide the one or more thresholds based on SSB.
  • one signaling including one or more thresholds based on SSB (for example, all thresholds based on SSB) may be received, or a first signaling including a first threshold based on SSB and a second signaling including a second threshold based on SSB may be received.
  • the receiving power of the at least one reference signal based on SSB received in the step 120 may be measured and obtained by any suitable means and at any suitable time.
  • the SS-RSRP may be measured and obtained when receiving the at least one reference signal based on SSB in the step 120.
  • the step 120 is illustrated after the step 110. In another example embodiment, the step 120 may be performed before the step 110, or may be performed concurrently with the step 110.
  • the at least one threshold based on SSB included in the at least one signaling received in the step 110 may include a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell. Then, in the step 130, the CSI-RS measurement on at least one of the serving cells and or non-serving cells may be performed conditionally according to whether the SS-RSRP on the serving cell satisfies a threshold condition associated with the threshold.
  • the CSI-RS measurement on the serving cell may be performed if the SS-RSRP on the serving cell is lower than the threshold for controlling whether to measure an SS-RSRP on the non-serving cell, ormay be notperformed otherwise.
  • the at least one threshold based on SSB included in the at least on signaling received in the step 110 may include a threshold different from the threshold available for controlling whether to measure an SS-RSRP on the non-serving cell. Then, in the step 130, the CSI-RS measurement on at least one of the serving cells or the non-serving cells may be performed conditionally according to whether the SS-RSRP on the serving cell satisfies a threshold condition associated with the threshold.
  • the CSI-RS measurement on the serving cell may be performed if the SS-RSRP on the serving cell is lower than the threshold for controlling whether to measure an SS-RSRP on the non-serving cell, ormay be not performed otherwise.
  • the at least one threshold based on SSB included in the at least on signaling received in the step 110 may include a first threshold and a second threshold. At least one of the first threshold or the second threshold may be different from the threshold available for controlling whether to measure an SS-RSRP on the non-serving cell. Then, in the step 130, the CSI-RS measurement on the serving cell may be performed conditionally according to whether the SS-RSRP on the serving cell satisfies a first threshold condition associated with the first threshold, and the CSI-RS measurement on one or more non-serving cells may be performed conditionally according to whether the SS-RSRP on the serving cell satisfies a second threshold condition associated with the second threshold.
  • the CSI-RS measurement on the serving cell may be performed if the SS-RSRP on the serving cell is below the first threshold, or may be not performed otherwise; and the CSI-RS measurement on one or more non-serving cells may be performed ifthe SS-RSRP on the serving cell is below the second threshold, or may be not performed otherwise.
  • the example method 100 may be performed in a mobile device or UE.
  • FIG. 2 illustrated an example method 200 for controlling CSI-RS measurement (e.g. a CSI-RS measurement for L3 RRM) , which, for example, may be performed in the access network (e.g. in the base station) so as to provide/transmit the at least one signaling including at least one threshold based on SSB in the step 110 of the example method 100 and the at least one reference signal based on SSB in the step 120 of the example method 100.
  • CSI-RS measurement e.g. a CSI-RS measurement for L3 RRM
  • the access network e.g. in the base station
  • the example method 200 may include a step 210 for transmitting at least one signaling including at least one threshold based on SSB, and a step 220 for transmitting at least one reference signal based on SSB.
  • the at least one signaling transmitted in the step 210 may be received in the step 110 of the example method 100, and the at least one threshold based on SSB in the at least one signaling transmitted in the step 210 may correspond to the at least one threshold used in the example method 100 which has been described above in some example embodiments.
  • the at least one threshold may include a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the threshold may be associated with a threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell (for example, the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be performed if the SS-RSRP on the serving cell is lower than the threshold, or not performed otherwise) ; or, the at least one threshold may be another threshold different from the threshold available for controlling whether to measure an SS-RSRP on the non-serving cell, and the another threshold may be associated with a threshold condition related to the SS-RSRP on the serving cell and for performing the CSI-RS measurement on at least one of the serving cell or the non-serving cell (for example, the CSI-RS measurement on at least one of the serving cell and one
  • one or more signaling may be transmitted to provide the one or more thresholds based on SSB.
  • one signaling including one or more thresholds based on SSB may be transmitted, or a first signaling including a first threshold based on SSB and a second signaling including a second threshold based on SSB may be transmitted.
  • the step 220 is illustrated after the step 210. In another example embodiment, the step 220 may be performed before the step 210, or may be performed concurrently with the step 210.
  • FIG. 3 illustrated an example execution sequence 300 between the example methods 100 and 200.
  • the example execution sequence 300 may involve a UE 310 and a base station (eNB or gNB) 320 in the access network.
  • the UE 310 may perform the example method 100 and the base station 320 may perform the example method 200.
  • At least one signaling 330 including at least one threshold based on SSB may be transmitted by the base station 320 in the step 210 and received by the UE 310 in the step 110. Then, on the side of the UE 310, the at least one threshold based on SSB may be obtained for use later in the step 130.
  • at least one reference signal based on SSB 340 may be transmitted by the base station 320 in the step 220 and received by the UE 310 in the step 120. Then, on the side of the UE 310, the receiving power of the at least one reference signal based on SSB 340 on the serving cell, i.e. SS-RSRP on the serving cell, may be measured or derived.
  • the step 130 of the example method 100 may be performed so as to perform conditionally the CSI-RS measurement on the server cell and/or the non-serving cell according to the obtained at least one threshold based SSB and the measured SS-RSRP on the serving cell.
  • NR New Radio
  • the at least one signaling 330 may include the s-MeasureConfig IE 410.
  • the s-MeasureConfig IE 410 may include two choice options, ssb-RSRP corresponding to SS-RSRP and csi-RSRP corresponding to RSRP of CSI-RS, where the threshold indicated by the s-MeasureConfig IE 410 with the choice option ssb-RSRP enabled may be used to control when the UE 310 measure an SS-RSRP on the non-serving cell.
  • the s-MeasureConfig IE 410 may be used in the NR system to provide a threshold used by the UE 310 for controlling when to perform RSRP measurements on non-serving cells. For example, when the receiving power of the reference signal 340 on the serving cell is below the threshold indicated by the s-MeasureConfig IE 410 with the choice option ssb-RSRP enabled.
  • the s-MeasureConfig IE 410 is reused.
  • the at least one threshold based on SSB in the at least one signaling 310 may include the threshold indicated by the s-MeasureConfig IE 410 with the choice option ssb-RSRP enabled.
  • the UE 310 may also perform the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • asignaling different from the s-MeasureConfig IE 410 which is illustrated as s-MeasureConfigCsi-rs IE 510 in FIG. 5, is also included in the at least one signalling 330.
  • the s-MeasureConfigCsi-rs IE 510 may include a threshold for the UE 310 to determine whether to perform the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • the UE 310 may perform the CSI-RS measurement on at least one of the serving cell or the non-serving cell if the SS-RSRP on the serving cell is lower than the threshold included in the s-MeasureConfigCsi-rs IE 510, or not perform the CSI-RS measurement on at least one of the serving cell or the non-serving cell if the SS-RSRP on the serving cell is above the threshold included in the s-MeasureConfigCsi-rs IE 510.
  • the s-MeasureConfig IE 410 with choice ssb-RSRP enabled may be used by the UE 310 for controlling when to perform RSRP measurements on non-serving cells
  • the threshold indicated by the s-MeasureConfigCsi-rs IE 510 may be used by the UE 310 to determine when to perform the CSI-RS measurement on at least one of the serving cell or the non-serving cell.
  • the threshold indicated by the s-MeasureConfig IE 410 with choice ssb-RSRP enabled may be used by the UE 310 to determine when to perform RSRP measurements on the non-serving cell and when to perform the CSI-RS measurement on one of the serving cell and the non-serving cell
  • the threshold indicated by the s-MeasureConfigCsi-rs IE 510 may be used by the UE 310 to determine when to perform the CSI-RS measurement on the other of the serving cell and the non-serving cell.
  • the threshold indicated by the s-MeasureConfig IE 410 with choice ssb-RSRP enabled may be used by the UE 310 to determine when to perform RSRP measurements on the non-serving cell
  • the threshold indicated by the s-MeasureConfigCsi-rs IE 510 may be used by the UE 310 to determine when to perform the CSI-RS measurement on the serving cell
  • the CSI-RS measurement on the non-serving cell may be not controlled.
  • Athreshold is introduced which is different from the threshold available for controlling whether to measure an SS-RSRP on the non-serving cell (i.e. the threshold indicated by the s-MeasureConfig IE 410 with choice ssb-RSRP enabled) , so that the SS-RSRP measurement the non-serving cell and the CSI-RS measurement on at least one of the serving cell or the non-serving cell may be controlled separately, through which, for example, higher flexibility, lower legacy, and simple configuration may be achieved.
  • s-MeasureConfigCsi-rs IE 510 is an example, and any other suitable new or legacy signalling may be used.
  • afirst threshold different from the s-MeasureConfig IE 410 which is illustrated as s-MeasureConfigCsiServing-rs IE 610 in FIG. 6 and a second threshold different from the s-MeasureConfig IE 410, which is illustrated as s-MeasureConfigCsiNonServing-rs IE 620 in FIG. 6, are also included in the at least one signalling 330.
  • the s-MeasureConfigCsiServing-rs IE 610 may include a threshold for the UE 310 to determine whether to perform the CSI-RS measurement on the serving cell
  • the s-MeasureConfigCsiNonServing-rs IE 620 may include a threshold for the UE 310 to determine whether to perform the CSI-RS measurement on the non-serving cell.
  • the UE 310 may perform the CSI-RS measurement on the serving cell if the SS-RSRP on the serving cell is lower than the threshold included in the s-MeasureConfigCsiServing-rs IE 610, or not perform the CSI-RS measurement on the serving cell ifthe SS-RSRP on the serving cell is above the threshold included in the s-MeasureConfigCsiServing-rs IE 610.
  • the UE 310 may perform the CSI-RS measurement on the non-serving cell if the SS-RSRP on the serving cell is lower than the threshold included in the s-MeasureConfigCsiNonServing-rs IE 620, or not perform the CSI-RS measurement on the non-serving cell ifthe SS-RSRP on the serving cell is above the threshold included in the s-MeasureConfigCsiNonServing-rs IE 620.
  • s-MeasureConfigCsiServing-rs IE 610 and the s-MeasureConfigCsiNonServing-rs IE 620 are examples, , and any other suitable new or legacy signalling may be used.
  • amodified s-MeasureConfig IE 710 is included in the at least one signaling 330.
  • the modified s-MeasureConfig IE 710 may include simultaneously a threshold available for controlling whether to measure an SS-RSRP on the non-serving cell (i.e. the threshold indicated by the s-MeasureConfig IE 410 with choice ssb-RSRP enabled) and at least one another threshold for controlling whether to perform the CSI-RS measurement on the serving cell and/orthe non-serving cell.
  • the modified s-MeasureConfig IE 710 may include simultaneously a threshold ssb-RSRP-CSI-RS for controlling whether to perform the CSI-RS measurement on both the serving cell and the non-serving cell.
  • the modified s-MeasureConfig IE 710 may include simultaneously a threshold ssb-RSRP-CSI-RS-SERVING for controlling whether to perform the CSI-RS measurement on the serving cell, but not provide any threshold for controlling whether to perform the CSI-RS measurement on the non-serving cell or utilize the threshold available for controlling whether to measure an SS-RSRP on the non-serving cell to control whether to perform the CSI-RS measurement on the non-serving cell.
  • the modified s-MeasureConfig IE 710 may include simultaneously a threshold ssb-RSRP-CSI-RS-NONSERVING for controlling whether to perform the CSI-RS measurement on the non-serving cell, but not provide any threshold for controlling whether to perform the CSI-RS measurement on the serving cell or utilize the threshold available for controlling whether to measure an SS-RSRP on the non-serving cell to control whether to perform the CSI-RS measurement on the serving cell.
  • the modified s-MeasureConfig IE 710 may include simultaneously a threshold ssb-RSRP-CSI-RS-SERVING for controlling whether to perform the CSI-RS measurement on the serving cell, and a threshold ssb-RSRP-CSI-RS-NONSERVING for controlling whether to perform the CSI-RS measurement on the non-serving cell.
  • multiple threshold based on SSB may be provided in one signaling so that, for example, gap assisted SSB based intra-frequency measurements may be avoided.
  • FIG. 7 An example using a modified s-MeasureConfig IE 710 is illustrated in FIG. 7.
  • an IE other than the modified s-MeasureConfig IE 710 may be utilized.
  • FIG. 8 illustrates an example apparatus 800 for controlling CSI-RS measurement, for example, a CSI-RS measurement for L3 RRM.
  • the example apparatus 800 may be at least a part of the UE 310.
  • the example apparatus 800 may include at least one processor 810 and at least one memory 820 that may include computer program code 830.
  • the at least one memory 820 and the computer program code 830 may be configured to, with the at least one processor 810, cause the apparatus 800 at least to perform at least the example method 100 described above.
  • the at least one processor 810 in the example apparatus 800 may include, but not limited to, at least one hardware processor, including at least one microprocessor such as a central processing unit (CPU) , aportion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on for example Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) . Further, the at least one processor 810 may also include at least one other circuitry or element not shown in FIG. 8.
  • at least one hardware processor including at least one microprocessor such as a central processing unit (CPU) , aportion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on for example Field Programmable Gate Array (FPGA) and Application Specific Integrated Circuit (ASIC) .
  • FPGA Field Programmable Gate Array
  • ASIC Application Specific Integrated Circuit
  • the at least one memory 820 in the example apparatus 800 may include at least one storage medium in various forms, such as a volatile memory and/or a non-volatile memory.
  • the volatile memory may include, but not limited to, for example, arandom-access memory (RAM) , acache, and so on.
  • the non-volatile memory may include, but not limited to, for example, aread only memory (ROM) , ahard disk, aflash memory, and so on.
  • the at least memory 820 may include, but are not limited to, an electric, amagnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.
  • the example apparatus 800 may also include at least one other circuitry, element, and interface, for example at least one I/O interface, at least one antenna element, and the like.
  • the circuitries, parts, elements, and interfaces in the example apparatus 800 may be coupled together via any suitable connections including, but not limited to, buses, crossbars, wiring and/or wireless lines, in any suitable ways, for example electrically, magnetically, optically, electromagnetically, and the like.
  • FIG. 9 illustrates another example apparatus 900 for controlling CSI-RS measurement, for example, a CSI-RS measurement for L3 RRM.
  • the example apparatus 800 may be at least a part of the UE 310.
  • the example apparatus 900 may include means 910 for performing the step 110 of the example method 100, means 920 for performing the step 120 of the example method 100, and means 930 for performing the step 130 of the example method 100.
  • at least one I/O interface, at least one antenna element, and the like may also be included in the example apparatus 900.
  • examples of means 910, 920 or 930 may include circuitries.
  • an example ofmeans 910 may include a circuitry configured to perform the step 110 of the example method 100
  • an example ofmeans 920 may include a circuitry configured to perform the step 120 of the example method 100
  • an example of means 930 may include a circuitry configured to perform the step 130 of the example method 100.
  • circuitry throughout this disclosure may refer to one or more or all of the following: (a) hardware-only circuit implementations (such as implementations in only analog and/or digital circuitry) ; (b) combinations of hardware circuits and software, such as (as applicable) (i) acombination of analog and/or digital hardware circuit (s) with software/firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) ; and (c) hardware circuit (s) and or processor (s) , such as a microprocessor (s) or a portion of a microprocessor (s) , that requires software (e.g., firmware) for operation, but the software may not be present when it is not needed for operation.
  • hardware-only circuit implementations such as implementations in only analog and/or digital circuitry
  • combinations of hardware circuits and software such as (as applicable) (i)
  • circuitry also covers an implementation ofmerely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the claim element, abaseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in server, acellular network device, or other computing or network device.
  • FIG. 10 illustrates an example apparatus 1000 for controlling CSI-RS measurement (e.g. a CSI-RS measurement for L3 RRM) , which, for example, may be at least a part of the access network, for example, at least a part of the base station 320.
  • CSI-RS measurement e.g. a CSI-RS measurement for L3 RRM
  • the example apparatus 1000 may include at least one processor 1010 and at least one memory 1020 that may include computer program code 1030.
  • the at least one memory 1020 and the computer program code 1030 may be configured to, with the at least one processor 1010, cause the apparatus 1000 at least to perform at least the example method 200 described above.
  • the at least one processor 1010 in the example apparatus 1000 may include, but not limited to, at least one hardware processor, including at least one microprocessor such as a CPU, aportion of at least one hardware processor, and any other suitable dedicated processor such as those developed based on for example FPGA and ASIC. Further, the at least one processor 1010 may also include at least one other circuitry or element not shown in FIG. 10.
  • the at least one memory 1020 in the example apparatus 1000 may include at least one storage medium in various forms, such as a volatile memory and/or a non-volatile memory.
  • the volatile memory may include, but not limited to, for example, aRAM, acache, and so on.
  • the non-volatile memory may include, but not limited to, for example, aROM, ahard disk, aflash memory, and so on.
  • the at least memory 1020 may include, but are not limited to, an electric, a magnetic, an optical, an electromagnetic, an infrared, or a semiconductor system, apparatus, or device or any combination of the above.
  • the example apparatus 1000 may also include at least one other circuitry, element, and interface, for example at least one I/O interface, at least one antenna element, and the like.
  • the circuitries, parts, elements, and interfaces in the example apparatus 1000 may be coupled together via any suitable connections including, but not limited to, buses, crossbars, wiring and/or wireless lines, in any suitable ways, for example electrically, magnetically, optically, electromagnetically, and the like.
  • FIG. 11 illustrates another example apparatus 1100 for controlling CSI-RS measurement (e.g. a CSI-RS measurement for L3 RRM) , which, for example, may be at least a part of the access network, for example, at least a part of the base station 320.
  • CSI-RS measurement e.g. a CSI-RS measurement for L3 RRM
  • the example apparatus 1100 may include means 1110 for performing the step 210 of the example method 200, and means 1120 for performing the step 220 of the example method 200.
  • the example apparatus 1100 may further include at least one I/O interface, at least one antenna element, and the like.
  • examples of means 1110 or 1120 may include circuitries.
  • an example of means 1110 may include a circuitry configured to perform the step 210 of the example method 200
  • an example of means 1120 may include a circuitry configured to perform the step 220 of the example method 200.
  • Another example embodiment may relate to computer program codes or instructions which may cause an apparatus to perform at least respective methods described above.
  • Such a computer readable medium may include at least one storage medium in various forms such as a volatile memory and/or a non-volatile memory.
  • the volatile memory may include, but not limited to, for example, aRAM, acache, and so on.
  • the non-volatile memory may include, but not limited to, aROM, ahard disk, aflash memory, and so on.
  • the words “comprise, ” “comprising, ” and the like are to be construed in an inclusive sense, as opposed to an exclusive or exhaustive sense; that is to say, in the sense of “including, but not limited to. ”
  • the word “coupled” refers to two or more elements that may be either directly connected, or connected by way of one or more intermediate elements.
  • the word “connected” refers to two or more elements that may be either directly connected, or connected by way ofone or more intermediate elements.
  • conditional language used herein such as, among others, “can, ” “could, ” “might, ” “may, ” “e.g., ” “for example, ” “such as” and the like, unless specifically stated otherwise, or otherwise understood within the context as used, is generally intended to convey that certain embodiments include, while other embodiments do not include, certain features, elements and/or states.
  • conditional language is not generally intended to imply that features, elements and/or states are in any way required for one or more embodiments or that one or more embodiments necessarily include logic for deciding, with or without author input or prompting, whether these features, elements and/or states are included or are to be performed in any particular embodiment.

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