WO2018228593A1 - Mesure de gestion des ressources radio (rrm) destinée au réseau de nouvelle radio (nr) - Google Patents

Mesure de gestion des ressources radio (rrm) destinée au réseau de nouvelle radio (nr) Download PDF

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Publication number
WO2018228593A1
WO2018228593A1 PCT/CN2018/091848 CN2018091848W WO2018228593A1 WO 2018228593 A1 WO2018228593 A1 WO 2018228593A1 CN 2018091848 W CN2018091848 W CN 2018091848W WO 2018228593 A1 WO2018228593 A1 WO 2018228593A1
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WIPO (PCT)
Prior art keywords
measurement
csi
block
configuration
rrm
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PCT/CN2018/091848
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English (en)
Inventor
Hsuan-Li Lin
Tsang-Wei Yu
Chiao-Yao CHUANG
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Mediatek Inc.
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Priority claimed from US16/009,515 external-priority patent/US10911997B2/en
Application filed by Mediatek Inc. filed Critical Mediatek Inc.
Priority to CN201880004397.8A priority Critical patent/CN109997343B/zh
Publication of WO2018228593A1 publication Critical patent/WO2018228593A1/fr

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    • 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
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H04L5/0057—Physical resource allocation for CQI

Definitions

  • the disclosed embodiments relate generally towireless communication, and, more particularly, tomethods and apparatus for power-efficient radio resource management (RRM) for new radio (NR) network.
  • RRM radio resource management
  • NR new radio
  • New technologies are developed to meet the growth such as carrier aggregation (CA) , which enables operators, vendors, content providers and the other mobile users to meet the increasing requirement for the data bandwidth.
  • CA carrier aggregation
  • 5G wireless network implements NR technologies can improve the network capacity.
  • the measurement gap is used for inter-frequency measurement.
  • the measurement gap is used for inter-frequency measurement, intra-frequency measurement with gap, and intra-frequency measurement without gap when all the measurement resource are overlapped by the measurement gap.
  • UE can be configured to measure synchronization signal (SS) blocks and/or channel state information reference signal (CSI-RS) .
  • SS synchronization signal
  • CSI-RS channel state information reference signal
  • the transaction of SS block is confined in 5ms time window while the transmission of the CSI-RS could have moved with more flexibility. This adds the complexity of the RRM measurement for the SS blocks and the CSI-RS.
  • Improvements and enhancements are required to configure and perform RRM measurement for the NR network more efficiently.
  • the RRM measurement is configured with one measurement gap for SS block and CSI-RS.
  • an extended MGL eMGL
  • sMGL shorter MGL
  • a single common measurement duration and a single common timing offset are configured for different CSI-RS resources.
  • the RRM measurement configuration configures both an SS block measurement and a CSI-RS measurement when the UE performs an initial synchronization, and wherein the measurement gap is configured with an extended measurement gap length (eMGL) larger than a standard MGL such that both the SS block and the CSI-RS are measured within the eMGL.
  • the RRM measurement configuration configures only a CSI-RS measurement after the UE performs an initial synchronization, and wherein the measurement gap is configured with short measurement gap length (sMGL) smaller than a standard MGL.
  • the RRM configuration and the measurement gap configuration are configured by dedicated signaling.
  • the CSI-RS is allocated adjacent to the SS blocks such that one measurement gap is configured for both the SS block and CSI-RS measurement.
  • the CSI-RS is allocated in a physical downlink shared channel (PDSCH) symbol before the SS block.
  • the CSI-RS is allocated in a physical downlink shared channel (PDSCH) symbol after the SS block.
  • the SS block is an SS burst block across multiple analog beams, and wherein CSI-RS is allocated in a physical downlink shared channel (PDSCH) symbol after the SS block.
  • the same analog beamforming applies to both the SS burst block and the CSI-RS burst block.
  • the CSI-RS measurement is conditionally configured.
  • the UE receives a RRM measurement configuration that includes a conditional measurement configuration for CSI-RS measurement.
  • the conditional measurement configuration for CSI-RS is based on one of triggering conditions comprising: a measurement result for beam management from a serving cell, a synchronization signal (SS) -block measurement result, and no triggering condition.
  • triggering conditions comprising: a measurement result for beam management from a serving cell, a synchronization signal (SS) -block measurement result, and no triggering condition.
  • the UE decodes the time index of the SS block conditionally.
  • the UE performs RRM measurement by the UE in a CONNECTED state based on the received RRM measurement configuration, wherein the UE only decodes a time index of configured SS block when one or more time-index triggering conditions are detected.
  • the UE performs RRM measurement on SS block of a serving cell and one or more neighboring cells to derive SS-block measurement.
  • the time-index triggering conditions comprising: a channel condition, a random-access channel (RACH) optimization is disabled, and a NBR CSI-RS is configured and is sufficient for RACH optimization.
  • the RRM measurement configuration includes a conditional measurement configuration for CSI-RS measurement based on one of triggering conditions comprising: a measurement result for beam management from a serving cell, a SS block measurement result, and no triggering condition.
  • Figure 1 illustrates a system diagram of a NR wireless network 100 with SS block and/or CSI-RS measurement configured for the RRM measurement in accordance with embodiments of the current invention.
  • Figure 2 illustrates exemplary diagrams of measurement gap configuration for the UE in the NR network such that the SS black and CSI-RS measurement are performed in one measurement gap in accordance with embodiments of the current invention.
  • Figure 3 illustrates exemplary diagrams of a UE performs an initial synchronization and fine synchronization with different RRM measurement configuration in accordance with embodiments of the current invention.
  • Figure 4A illustrates an exemplary table of the CSI-RS configuration with exemplary configuration values in accordance with embodiments of the current invention.
  • Figure 4B illustrates an exemplary table of the CSI-RS configuration with exemplary configuration values when reusing configuration of CSI-RS for beam management in accordance with embodiments of the current invention.
  • Figure 5 illustrates exemplary diagrams for the UE handover procedure in the CONNECTED mode with RRM measurement in the NR network in accordance with embodiments of the current invention.
  • Figure 6A exemplary diagrams of CSI-RS placement within five milliseconds of the SS burst and is adjacent to the SS block for 15/30/120kHz scenarios in accordance with embodiments of the current invention.
  • Figure 6B exemplary diagrams of CSI-RS placement within five milliseconds of the SS burst and is adjacent to the SS block for 240 kHz scenarios in accordance with embodiments of the current invention.
  • Figure 7 illustrates exemplary diagrams for the CSI-RS being placed after the SS burst window in accordance with embodiments of the current invention.
  • Figure 8 illustrates an exemplary flow chart for a RRM measurement configuration with one measurement gap for SS block and CSI-RS in accordance with embodiments of the current invention.
  • Figure 9 illustrates an exemplary flow chart of allocating the CSI-RS adjacent to the SS blocks for RRM measurement in accordance with embodiments of the current invention.
  • Figure 10 illustrates an exemplary flow chart of the conditionally configures the CSI-RS for RRM measurement in accordance with embodiments of the current invention.
  • Figure 11 illustrates an exemplary flow chart of UE decoding the time index of the SS block conditionally in accordance with embodiments of the current invention.
  • FIG. 1 illustrates a system diagram of a NR wireless network 100 with SS block and/or CSI-RS measurement configured for the RRM measurement in accordance with embodiments of the current invention.
  • Wireless communication system 100 includes one or more wireless networks each of the wireless communication network has fixed base infrastructure units, such as receiving wireless communications devices or base unit 102 103, and 104, forming wireless networks distributed over a geographical region.
  • the base unit may also be referred to as an access point, an access terminal, a base station, a Node-B, an eNode-B, a gNB, or by other terminology used in the art.
  • Each of the base unit 102, 103, and 104 serves a geographic area.
  • the base unit performs beamforming in the NR network.
  • Backhaul connections 113, 114 and 115 connect the non-co-located receiving base units, such as 102, 103, and 104. These backhaul connections can be either ideal or non-ideal.
  • a wireless communications device 101in wireless network 100 is served by base station 102 via uplink 111 and downlink 112.
  • Other UEs 105, 106, 107, and 108 are served by different base stations.
  • UEs 105 and 106 are served by base station 102.
  • UE107 is served by base station 104.
  • UE 108 is served by base station 103.
  • RRM measurement is configured by NR network 100 such that the SS block and the CSI-RS are measured within one measurement gap.
  • the measurement gap length (MGL) can be configured with a standard MGL (6ms) , or an extended length, the eMGL or a short length, the sMGL.
  • the UE performing an initial synchronization that both the SS block and the CSI-RS are measured may be configured with one standard MGL, or one eMGL, or one sMGL. Both SS block and the CSI-RS can be measured within one measurement gap, such that UE doesn’t need to retune its RF twice.
  • the UE performing an initial synchronization with only SS block may be configured with the standard MGL, or the eMGL, or the sMGL. Which types of MGL is configured depends on the length of SMTC (SS block based RRM measurement timing configuration) window duration.
  • the UE performing a fine synchronization with only CSI-RS may be configured with the standard MGL, or the eMGL, or the sMGL.
  • the CRI-RS is allocated adjacent to the SS block.
  • a single common measurement duration and a single common timing offset for different CSI-RS resource are signaling to form the CSI-RS burst.
  • Figure 1 further shows simplified block diagrams of wireless device /UE 101 and base station 102 in accordance with the current invention.
  • Base station 102 has an antenna 126, which transmits and receives radio signals.
  • a RF transceiver module 123 coupled with the antenna, receives RF signals from antenna 126, converts them to baseband signals and sends them to processor 122.
  • RF transceiver 123 also converts received baseband signals from processor 122, converts them to RF signals, and sends out to antenna 126.
  • Processor 122 processes the received baseband signals and invokes different functional modules to perform features in base station 102.
  • Memory 121 stores program instructions and data 124 to control the operations of base station 102.
  • Base station 102 also includes a set of control modules, such as a RRM measurement circuit 181 that configures RRM measurement and communicates with UEs to implement the RRM measurement functions.
  • UE 101 has an antenna 135, which transmits and receives radio signals.
  • a RF transceiver module 134 coupled with the antenna, receives RF signals from antenna 135, converts them to baseband signals and sends them to processor 132.
  • RF transceiver 134 also converts received baseband signals from processor 132, converts them to RF signals, and sends out to antenna 135.
  • Processor 132 processes the received baseband signals and invokes different functional modules to perform features in mobile station 101.
  • Memory 131 stores program instructions and data 136 to control the operations of mobile station 101.
  • a RRM measurement configuration circuit 191 configures a RRM measurement configuration, wherein the RRM measurement configuration includes a conditional measurement configuration for channel state information reference signal (CSI-RS) measurement.
  • a RRM measurement circuit 192 performs a RRM measurement based on the RRM measurement configuration and the measurement gap configuration and performs a RRM measurement in a UE CONNECTED state based on the received RRM measurement configuration.
  • a RRM measurement gap circuit 193 obtains a measurement gap configuration such that all configured RRM measurements are performed within one configured measurement gap.
  • a RRM measurement report circuit transmits a measurement report to the NR network, wherein the NR network determines a target cell for handover based on the measurement report.
  • the measurement gap is configured such that the SS block and CSI-RS measurements are performed within one measurement gap.
  • MGL is configured to accommodate both the SS block and CSI-RS measurements.
  • Figure 2 illustrates exemplary diagrams of measurement gap configuration for the UE in the NR network such that the SS black and CSI-RS measurement are performed in one measurement gap in accordance with embodiments of the current invention.
  • measurement gap is used for inter-frequency measurement.
  • the measurement gap is specified by MGL and measurement gap repetition period (MGRP) .
  • Diagram 210 illustrates the measurement gap configuration with the MGL 211 and MGRP 212.
  • the MGL and MGRP has standard or default configuration values. In one example, the standard MGL value is 6ms and the standard MGRP value is 40ms.
  • the UE performs RRM measurement during the MGL period. Longer MGL reduces scheduling opportunities and degrades system performance and blocks HARQ transmission.
  • the UE can be configured to measure both the SS block and/or CSI-RS. The transmission of SS blocks is confirmed in SMTC window duration, while the transmission of CSI-RS could have more flexibility. Such combination complicates the design of the measurement gap for the NR network.
  • the extended MGL eMGL
  • Diagram 220 illustrates the eMGL configuration. Configuration 220 has an eMGL 221 and an MGRP 222.
  • the MGRP 222 is the standard MGRP value of 40ms.
  • the eMGL is longer than the standard MGL by x ms as shown in 223.
  • the eMGL has a value of the standard MGL plus x. In one example, the eMGL is 6ms+x.
  • SS block burst 225 and CSI-RS burst 226 cannot fit in the standard MGL but can be measured within one eMGL 221. The same is the SS burst 227 and CSI-RS burst 228.
  • the UE can perform the SS block and CSI-RS RRM measurement within one measurement gap. With the short MGL configuration, the system performance is improved.
  • a short MGL can be configured when only the CSI-RS needs to measured.
  • MGL 231 is a sMGL.
  • sMGL is x ms shorter than the standard MGL, as illustrated by 233.
  • MGL 231 is a value of (6-x) milliseconds.
  • MGRP 232 remains the standard MGRP value.
  • only CSI-RS burst 236 is measured during the measurement gap while SS burst 235 falls outside the measurement gap and is not measured.
  • SS burst 237 which falls outside of the measurement gap and is not measured while CSI-RS burst 238 is measured during the measurement gap with the sMGL.
  • the RRM measurement configuration process configures RRM measurement gap as well as other RRM measurement parameters including the SS block configuration and the CSI-RS configuration.
  • the RRM measurement gap configuration includes MGL, MGRP and the time offset of measurement gap. These RRM measurement related configuration can be signaled to the UE by the network. The configuration can be updated /changed based on one or more conditions.
  • FIG. 3 illustrates exemplary diagrams of a UE performs an initial synchronization and fine synchronization with different RRM measurement configuration in accordance with embodiments of the current invention.
  • the UE in the CONNECTED mode performs RRM measurement with standard MGL, or eMGL, or sMGL based on the synchronization stage.
  • the UE starts the RRM measurement procedure in CONNECTED mode.
  • the UE determines whether an initial synchronization is performed. If step 302 determines yes that an initial synchronization is performed, at step 311, the initial synchronization is performed based on SS block of other cells.
  • the UE measures both the SS block and the CSI-RS.
  • the UE is configured with the eMGL for step 321. In another embodiment, the UE is configured with the standard MGL. If step 302 determines no that it is not an initial synchronization, the UE performs fine synchronization without SS block at step 312. At step 322, the UE measures the CSI-RS only. In one embodiment, the UE is configured with sMGL.
  • Block 331 also illustrates an exemplary configuration for RRM measurement in the NR network.
  • the configuration may include a RRM measurement gap configuration and a RRM measurement configuration.
  • the RRM measurement configuration may include configuration parameters including the MGL, the MGRP and the time offset of the measurement gap.
  • the RRM measurement configuration may include the SMTC configurations and the CSI-RS configuration.
  • the SMTC configurations may include one or more elements including the SMTC window periodicity, SMTC window duration, and the timing offset of the SMTC window, and the power offset on NR-SSS and PBCH demodulation reference signal (DMRS) .
  • DMRS power offset on NR-SSS and PBCH demodulation reference signal
  • the CSI-RS configuration includes one or more elements including the cell identification (ID) , the scrambling ID, the CSI-RS periodicity and timing offset, the measurement bandwidth of the CSI-RS, the frequency location/the starting point of the sequence of the CSI-RS, the numerology of the CSI-RSI and the quasi-co-location (QCL) of the CSI-RS.
  • the RRM configuration parameters are configured by dedicated signaling.
  • Figure 4A illustrates an exemplary table of the CSI-RS configuration with exemplary configuration values in accordance with embodiments of the current invention.
  • the CSI-RS measurement configuration is DMTC (discovery reference signal measurement timing configuration) -type of CSI-RS burst.
  • the configuration parameters, as illustrated include the bandwidth, the numerology, the measurement duration, the periodicity, the timing offset, the resource ID, and the cell ID.
  • the single measurement duration and the single measurement timing offset for different CSI-RS ID can be signaled.
  • Figure 4B illustrates an exemplary table of the CSI-RS configuration with exemplary configuration values when reusing configuration of CSI-RS for beam management in accordance with embodiments of the current invention.
  • the CSI-RS measurement configuration can reuse the CSI-RS for beam management configuration if the corresponding cell ID indicates the serving cell.
  • the configuration parameters include the bandwidth, the numerology, the periodicity, the resource ID, the cell ID, and the timing offset to the time reference.
  • the time reference is the SS block.
  • the UE in the CONNECTED mode in the NR network performs RRM measurement for handover procedures with SS block and CSI-RS measurements.
  • the UE configures the CSI-RS measurement conditionally based on one or more predefined triggering events.
  • the UE decodes the time index of the SS block conditionally based on one or more predefined triggering conditions.
  • Figure 5 illustrates exemplary diagrams for the UE handover procedure in the CONNECTED mode with RRM measurement in the NR network in accordance with embodiments of the current invention.
  • the UE performs handover procedure in the CONNECTED mode.
  • the UE obtains the RRM measurement configuration.
  • the UE obtains the measurement configuration from the network including the measurement configuration for the SS block, the reporting configuration, and other parameters comprising a white list of candidate neighboring gNBs and a frequency priority list.
  • the SS block configuration includes one or more elements including the time to trigger, the measurement gap configuration, and the indicator of whether to measure the RSRQ.
  • the reporting configuration includes one or more elements including the handover criterion, the indicator of whether it is periodic or event-driven, and the NR measurement reporting event.
  • the UE may need to measure many CSI-RS.
  • the CSI-RS measurement can be conditionally configured.
  • the CSI-RS measurement configuration can be triggered based on channel condition by monitoring the beam and be associated with the beam, such as the SS block.
  • the CRI-RS measurement configuration can also be triggered by SS-block RSRP, including the serving cell and /or the neighboring cells. It can also be triggered by the CSI-RS for beam management, which is not performed for the neighboring CSI-RS.
  • the RRM CSI-RS for the serving cell could be burst-like, the CSI-RS are confined within a given time interval.
  • the CSI-RS measurement is unconditionally configured, which is the same as the triggering condition no triggering condition required.
  • the UE performs RRM measurement.
  • the UE performs the measurement on SS block of the serving cell and the one or more neighboring cells to drive SS-block RSRP and/or RSRQ.
  • the UE decodes the time index of SS block conditionally based on one or more predefined conditions. The conditionally triggered decoding the time index increases the UE computation and reduces power consumption.
  • the time index reporting is not decoded when detecting a high signal noise ratio (SNR) .
  • SNR signal noise ratio
  • the time index reporting not decoded when the RACH optimization is not desirable.
  • the time index reporting is not reported when the NBR CSI-RS is configured and its channel quality is sufficient for RACH optimization.
  • the UE performs measurement on CSI- RS and derives CSI-RS RSRP and/or CSI-RS RSRQ.
  • the UE sends the measurement report to the serving cell.
  • the measurement report is sent when the corresponding reporting condition is met and the corresponding measurement event is triggered.
  • the measurement report at least includes the cell ID and the measurement results.
  • the measurement results can be one or more of the RSRP, the RSRQ or the RSSI.
  • the measurement report could also include the time index of the SS block.
  • the UE receives a handover command.
  • the serving cell decides the target cell and prepares the candidate target cell via the backhaul based on the measurement report.
  • the handover command at least includes the target cell ID.
  • the contention-free RACH optimization with beam correspondence is implemented to save the RACH resource. Instead of allocating dedicated RACH on every beam, the beam correspondence RACH optimization is implement.
  • the dedicated RACH parameters can be configured in the handover command and is associated with the DL SS block or the CSI-RS.
  • the UE connects to the target cell. If the handover procedure is successful, the UE sends the handover complete message to the target gNB.
  • the CSI-RS placement is adjacent to the SS block as much as possible such that the single measurement gap configuration is enough for both the CSI-RS and the SS block measurement.
  • the CSI-RS placement is within five milliseconds of the SS burst and is adjacent to the SS block.
  • CSI-RS placement is after the SS burst.
  • the SS block includes the primary SS (PSS) and the secondary SS (SSS) block.
  • PSS primary SS
  • SSS secondary SS
  • the channel structure of the SS block may have the PSS and the SSS block right next to each other.
  • the PSS block and the SSS block are adjacent to each with other channel block in between.
  • the physical broadcast channel (PBCH) , the PSS block and the SSS are in consecutive symbols and form the SS/PBCH blocks.
  • a PBCH block, an SSS block, a PSS block, and a PBCH block occupy consecutive symbols in ascending order.
  • a PSS block, a PBCH block, an SSS block, and a PBCH block occupy consecutive symbols in ascending order.
  • Other possible channel structures are possible. It is understood by one of ordinary skills in the art that the general principle of having the CSI-RS placement to be adjacent to the SS block as much as possible such that the single measurement gap configuration is enough for both the CSI-RS and the SS block measurement applies to different channel structures.
  • the CSI-RS is allocated in the PDSCH symbol adjacent to the SS block. There is at least one symbol PDSCH after each SS block, which can be used for the CSI-RS transmission.
  • the CSI-RS can share the same analog beamforming with the SS block.
  • the CSI_RS can additionally have its own digital beamforming.
  • the CSI-RS can be placed before or after the SS block. There is no need to configure two different MGLs for the SS block and the CSI-RS separately.
  • the UE can receive the SS blocks and the CSI_RS of particular cell within one MGL. The RF tuning time is saved.
  • the MGL can remain to be standard MGL as six milliseconds when the CSI-RS is placed adjacent to the SS blocks.
  • the following figures are exemplary scenarios for the placement of the CSI-RS. The examples are not exhausted. Other possibilities of placing the CSI-RS block adjacent to the SS blocks are also valid.
  • Figure 6A exemplary diagrams of CSI-RS placement within five milliseconds of the SS burst and is adjacent to the SS block for 15/30/120kHz scenarios in accordance with embodiments of the current invention.
  • Diagram 610 illustrates a first exemplary allocation of the CSI-RS.
  • the CSI-RS are allocated in the NR-PDSCH.
  • the NR-PDSCH are within the SS block 615 next to the PBCH and adjacent to the SS block and so is the same configuration for SS block 617.
  • both the NR-PDSCH block with the CSI-RS and the SS block are within the same analog beam, namely analog beam 611 and analog beam 613.
  • SS block 612 and SS block 614 contains NR-PDSCH, which are after the PSS and PBCH to be adjacent to the SS.
  • the NR-PDSCH containing the CSI-RS are within the same analog beam, namely analog beams 616 and 618, respectively.
  • the CSI-RS blocks are allocated in the NR-PDSCH.
  • the NR-PDSCH are within the SS block 625 next to the PBCH and adjacent to the SS block and so is the same configuration for SS block 627.
  • both the NR-PDSCH block with the CSI-RS and the SS block are within the same analog beam, namely analog beam 621 and analog beam 623.
  • SS block 622 and SS block 624 contains NR-PDSCH, which are next to the PBCH to be adjacent to the SS.
  • the NR-PDSCH containing the CSI-RS are within the same analog beam, namely analog beams 626 and 628, respectively.
  • the CSI-RS are allocated in the NR-PDSCH.
  • the NR-PDSCH are within the SS block 636 next to the PBCH and adjacent to the SS block and so is the same configuration for SS block 638.
  • both the NR-PDSCH block with the CSI-RS and the SS block are within the same analog beam, namely analog beam 632 and analog beam 634.
  • SS block 631 and SS block 633 contains NR-PDSCH, which are after the PSS and PBCH to be adjacent to the SS.
  • the NR-PDSCH containing the CSI-RS are within the same analog beam, namely analog beams 635 and 637, respectively.
  • the SS blocks, also shown as the SS/PBCH blocks, 615-618, 625-628, and 635-638 are exemplary structures and so are the channel structure are exemplary. It is understood that other configurations of the SS block or SS/PBCH block apply as well.
  • Figure 6B exemplary diagrams of CSI-RS placement within five milliseconds of the SS burst and is adjacent to the SS block for 240 kHz scenarios in accordance with embodiments of the current invention.
  • the CSI-RS are allocated in the NR-PDSCH.
  • the NR-PDSCH are within the SS block 655 next to the PBCH and adjacent to the SS block and so is the same configuration for SS block 656, 657, and 658.
  • both the NR-PDSCH block with the CSI-RS and the SS block are within the same analog beam, namely analog beams 651, 652, 653, and 654, respectively.
  • the CSI-RS are allocated in the NR-PDSCH.
  • the NR-PDSCH are within the SS block 665 next to the PBCH and adjacent to the SS block and so is the same configuration for SS block 667. Further both the NR-PDSCH block with the CSI-RS and the SS block are within the same analog beam, namely analog beam 661 and analog beam 663. Similarly, SS block 662 and SS block 664 contains NR-PDSCH, which are after the PSS and PBCH to be adjacent to the SS. The NR-PDSCH containing the CSI-RS are within the same analog beam, namely analog beams 666 and 668, respectively.
  • the SS blocks, also shown as the SS/PBCH blocks, 655-658 and 665-668 are exemplary structures and so are the channel structure are exemplary. It is understood that other configurations of the SS block or SS/PBCH block apply as well.
  • CSI-RS is allocated after the SS burst window with the same analog beam forming order as the SS blocks. In one embodiment, the CSI-RS is right after the SS burst window. There is no need to configure two different MGLs for the SS blocks and the CSI-RS separately.
  • the UE can receive SS blocks and the CSI-RS of particular cell within one MGL. It saves the RF tuning time. The number and the bandwidth of the transmitted CSI-RS can be extended to improve measurement accuracy.
  • Figure 7 illustrates exemplary diagrams for the CSI-RS being placed after the SS burst window in accordance with embodiments of the current invention.
  • SS burst 710 includes multiple SS blocks including SS 711, SS 712, and SS 715.
  • the CSI-RS burst 720 is placed right after SS burst 710.
  • CSI-RS burst 720 has CSI-RS 721, CSI-RS 722, and CSI-RS 725.
  • SS burst 750 includes multiple SS blocks including SS 751, SS 752, and SS 755.
  • the CSI-RS burst 760 is placed right after SS burst 750.
  • CSI-RS burst 760 has CSI-RS 761, CSI-RS 762, and CSI-RS 765.
  • the CSI-RS burst has the same analog beam forming order as the SS blocks.
  • SS 711 has the same beamforming as CSI-RS 721.
  • SS 712 and 715 have the same beamforming as CSI-RS 722 and 725, respectively.
  • SS 751 has the same beamforming as CSI-RS 761.
  • SS 752 and 755 have the same beamforming as CSI-RS 762 and 765, respectively.
  • Figure 8 illustrates an exemplary flow chart for a RRM measurement configuration with one measurement gap for SS block and CSI-RS in accordance with embodiments of the current invention.
  • the UE obtains a RRM measurement configuration in a NR network, wherein the RRM measurement requires the UE performing at least one measurement comprising: a SS measurement and a CSI-RS measurement.
  • the UE obtains a measurement gap configuration by the UE such that all configured RRM measurements are performed within one configured measurement gap.
  • the UE performs a RRM measurement based on the RRM measurement configuration and the measurement gap configuration.
  • Figure 9 illustrates an exemplary flow chart of allocating the CSI-RS adjacent to the SS blocks for RRM measurement in accordance with embodiments of the current invention.
  • the UE obtains a RRM measurement configuration in a NR network, wherein the RRM measurement is performed on a SS block and a CSI-RS.
  • the UE obtains a RRM measurement gap configuration, wherein the SS block and the CSI-RS measurements are performed within one measurement gap.
  • the UE performs a RRM measurement, wherein the CSI-RS is adjacent to the SS block.
  • Figure 10 illustrates an exemplary flow chart of the conditionally configures the CSI-RS for RRM measurement in accordance with embodiments of the current invention.
  • the UE receives a RRM measurement configuration in a NR network, wherein the RRM measurement configuration includes a conditional measurement configuration for CSI-RS measurement.
  • the UE performs RRM measurement by the UE in a CONNECTED state based on the received RRM measurement configuration.
  • the UE transmits a measurement report to the NR network, wherein the NR network determines a target cell for handover based on the measurement report.
  • Figure 11 illustrates an exemplary flow chart of UE decoding the time index of the SS block conditionally in accordance with embodiments of the current invention.
  • the UE receives a RRM measurement configuration in a NR network, wherein the RRM measurement configuration configures at least one measurement comprising: a SS measurement and a CSI-RS measurement.
  • the UE performs RRM measurement by the UE in a CONNECTED state based on the received RRM measurement configuration, wherein the UE only decodes a time index of configured SS block when one or more time-index triggering conditions are detected.
  • the UE transmits a measurement report to the NR network, wherein the NR network determines a target cell for handover based on the measurement report.

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un appareil et des procédés destinés à la mesure RRM dans le réseau NR. Selon un nouvel aspect, la mesure RRM est configurée de manière à comprendre un intervalle de mesure pour le bloc SS et pour les CSI-RS. Selon un mode de réalisation, un MGL étendu (eMGL) est configuré de sorte que le bloc SS et les CSI-RS représentent la mesure dans un intervalle de mesure. Selon un autre mode de réalisation, le MGL plus court (sMGL), qui est plus court que le MGL standard, est configuré. Selon un autre aspect nouveau, le CSI-RS est attribué de manière à être adjacent aux blocs SS de sorte qu'un seul intervalle de mesure est configuré pour le bloc SS et pour la mesure CSI-RS. Selon un autre nouvel aspect, la mesure CSI-RS est configurée de manière conditionnelle. Selon un autre nouvel aspect, l'UE décode l'indice temporel du bloc SS de manière conditionnelle.
PCT/CN2018/091848 2017-06-16 2018-06-19 Mesure de gestion des ressources radio (rrm) destinée au réseau de nouvelle radio (nr) WO2018228593A1 (fr)

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