WO2021001946A1 - Terminal - Google Patents

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Publication number
WO2021001946A1
WO2021001946A1 PCT/JP2019/026387 JP2019026387W WO2021001946A1 WO 2021001946 A1 WO2021001946 A1 WO 2021001946A1 JP 2019026387 W JP2019026387 W JP 2019026387W WO 2021001946 A1 WO2021001946 A1 WO 2021001946A1
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WO
WIPO (PCT)
Prior art keywords
cell
serving cell
adjacent cell
ssb
index
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Application number
PCT/JP2019/026387
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English (en)
Japanese (ja)
Inventor
卓馬 高田
浩樹 原田
Original Assignee
株式会社Ｎｔｔドコモ
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 株式会社Ｎｔｔドコモ filed Critical 株式会社Ｎｔｔドコモ
Priority to CN201980097989.3A priority Critical patent/CN114097269A/zh
Priority to PCT/JP2019/026387 priority patent/WO2021001946A1/fr
Publication of WO2021001946A1 publication Critical patent/WO2021001946A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to a terminal that executes measurement of adjacent cells.
  • LTE Long Term Evolution
  • NR New Radio
  • NG Next Generation
  • the network can notify the terminal (User Equipment, UE) whether or not the serving cell and the adjacent cell using the same frequency are synchronized. Specifically, it is notified by "deriveSSB-IndexFromCell" included in the information element (IE) of "MeasObjectNR” (Non-Patent Document 1).
  • MeasObjectNR is information applied to intra-frequency / inter-frequency measurement of SSB (SS / PBCH Block) composed of a synchronization signal (SS: Synchronization Signal) and a downlink physical broadcast channel (PBCH: Physical Broadcast CHannel). Further, the diveSSB-IndexFromCell is information indicating whether or not the terminal can use the timing of the serving cell to derive the index of the SSB transmitted by the adjacent cell.
  • SSB Synchronization Signal
  • PBCH Physical Broadcast CHannel
  • the terminal determines whether the frequency and subcarrier interval (SCS) included in the serving cell setting information (ServingCellConfigCommon) are the same as the frequency and SCS included in the MeasObjectNR. Check.
  • SCS frequency and subcarrier interval
  • the terminal assumes that the frame boundary and the System Frame Number (SFN) match between the serving cell and the adjacent cell, and measures the quality of the adjacent cell.
  • SFN System Frame Number
  • the detection of SSB index can be omitted (Non-Patent Document 2). As a result, the efficiency of quality measurement of adjacent cells is improved.
  • RRC Radio Resource Control
  • the above-mentioned derivativeSSB-IndexFromCell can notify whether the serving cell and the adjacent cell using the same frequency are synchronized, but in actual network operation, the serving cell and the adjacent cell using a different frequency are synchronized. There are cases where it exists.
  • Release 15 cannot notify whether or not the serving cell and the adjacent cell using a frequency different from that of the serving cell are synchronized.
  • an object of the present invention is to provide a terminal having improved efficiency of quality measurement of adjacent cells.
  • One aspect of the present disclosure is a case where a receiving unit (wireless receiving unit 220) that receives synchronization information indicating that the serving cell and an adjacent cell using a frequency different from the serving cell are synchronized, and the synchronization information is received.
  • a terminal including a control unit (control unit 250) that executes measurement of the adjacent cell without acquiring an index of a synchronization signal block from the adjacent cell.
  • FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10.
  • FIG. 2 is a diagram showing a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10 (NR).
  • FIG. 3 shows a setting example of an SSB (SS / PBCH Block) composed of a synchronization signal (SS: Synchronization Signal) used in the wireless communication system 10 (NR) and a downlink physical broadcast channel (PBCH: Physical Broadcast CHannel). It is a figure which shows.
  • FIG. 4 is a functional block configuration diagram of the UE 200.
  • FIG. 5 is a diagram showing a communication sequence relating to quality measurement of adjacent cells by the UE 200.
  • FIG. 6 is a diagram showing a quality measurement operation flow of adjacent cells by the UE 200.
  • FIG. 7 is a diagram showing a processing content (No. 1) to be replaced with the processing of S130 of the operation example 1.
  • FIG. 8 is a diagram showing a processing content (No. 2) to be replaced with the processing of S130 of the operation example 1.
  • FIG. 9 is a diagram showing an example of the hardware configuration of UE200.
  • FIG. 1 is an overall schematic configuration diagram of the wireless communication system 10 according to the present embodiment.
  • the wireless communication system 10 is a wireless communication system according to 5G New Radio (NR), and includes Next Generation-Radio Access Network 20 (hereinafter, NG-RAN20, and user terminal 200 (hereinafter, UE200)). .. To.
  • NR 5G New Radio
  • NG-RAN20 Next Generation-Radio Access Network 20
  • UE200 user terminal 200
  • NG-RAN20 includes radio base stations 100A and 100B (hereinafter, gNB100A and gNB100B).
  • the specific configuration of the wireless communication system 10 including the number of gNBs and UEs is not limited to the example shown in FIG.
  • NG-RAN20 actually includes multiple NG-RAN Nodes, specifically gNB (or ng-eNB), and is connected to a core network (5GC, not shown) according to 5G.
  • NG-RAN20 and 5GC may be simply expressed as a network.
  • GNB100A, 100B are wireless base stations that comply with 5G, and execute wireless communication according to UE200 and 5G.
  • gNB100A, 100B and UE200 are Massive MIMO that generates a beam with higher directivity by controlling radio signals transmitted from multiple antenna elements, and carrier aggregation (CA) that uses multiple component carriers (CC) in a bundle. ), And dual connectivity (DC) that communicates between the UE and multiple NG-RAN Nodes at the same time.
  • Massive MIMO that generates a beam with higher directivity by controlling radio signals transmitted from multiple antenna elements
  • CA carrier aggregation
  • CC component carriers
  • DC dual connectivity
  • FIG. 2 shows a configuration example of a wireless frame, a subframe, and a slot used in the wireless communication system 10 (NR).
  • NR is based on 15kHz, which is the same subcarrier spacing (SCS) as LTE, and can support a wider range of 30kHz, and 60, 120, and 240kHz (not shown).
  • SCS subcarrier spacing
  • slots, subframes, and wireless frames are composed of multiple Orthogonal Frequency Division Multiplexing (OFDM) symbols.
  • a slot is composed of 14 OFDM symbols regardless of the subcarrier interval, a subframe is defined as a 1 ms interval, and a frame is defined by 10 subframes.
  • FIG. 3 shows a setting example of an SSB (SS / PBCH Block) composed of a synchronization signal (SS: Synchronization Signal) used in the wireless communication system 10 (NR) and a downlink physical broadcast channel (PBCH: Physical Broadcast CHannel). Shown.
  • the SSB may be referred to as a sync signal block.
  • SSB can be set for each cell (Cell A, B in the figure).
  • the transmission cycle of SSB can be set for each cell in the range of 5, 10, 20, 40, 80, 160 ms.
  • the number of SSBs can be set for each frequency.
  • the reception quality measurement cycle by the UE200 does not necessarily have to be the same as the SSB transmission cycle, and by setting an appropriate measurement cycle according to the environment, avoid unnecessary measurement operations and reduce the power consumption of the UE200. Can be done.
  • the network can notify the UE 200 whether or not the serving cell and the adjacent cell using the same frequency are synchronized. Specifically, it is notified by "deriveSSB-IndexFromCell" included in the information element (IE) of "MeasObjectNR".
  • IE information element
  • MeasObjectNR specifies information applicable to SSB intra-frequency / inter-frequency measurement and / or Channel State Information Reference Signal (CSI-RS) intra-frequency / inter-frequency measurement.
  • CSI-RS Channel State Information Reference Signal
  • One MeasObjectNR may be set for one SSB frequency.
  • DefiveSSB-IndexFromCell is information indicating whether the terminal can use the timing of the serving cell to derive the index of the SSB transmitted by the adjacent cell. If this field is set to "true", the UE200 expects a System Frame Number (SFN, radio frame number) and frame boundary alignment between cells at the serving frequency as specified in 3GPP TS 38.133. ..
  • UE200 assumes that the serving cell and the adjacent cell are synchronized. "Synchronized” may be interpreted as having a frame boundary and SFN between the serving cell and the adjacent cell.
  • deriveSSB-IndexFromCell can be set for each SSB frequency.
  • the notification that the serving cell and the adjacent cell are synchronized by such a deviveSSB-IndexFromCell is also applied to the adjacent cells using different frequencies.
  • the serving cell and the adjacent cell using different frequencies may be synchronized, and such a case can be dealt with.
  • deriveSSB-IndexFromCell For the synchronization between the serving cell and the adjacent cell of different frequency, the debugSSB-IndexFromCell may be diverted or a new IE (field) may be defined.
  • the UE200 determines whether the frequency and subcarrier interval (SCS) included in the serving cell setting information (ServingCellConfigCommon) are the same as the frequency and SCS included in the MeasObjectNR. Check.
  • SCS frequency and subcarrier interval
  • the UE200 assumes that the frame boundary and SFN match between the serving cell and the adjacent cell when the frequency and SCS are the same, and omits the detection of the SSB index in the quality measurement of the adjacent cell. ..
  • FIG. 4 is a functional block configuration diagram of the UE 200.
  • the wireless transmitter 210 transmits an uplink signal (UL signal) according to NR.
  • the wireless receiver 220 receives the downlink signal (DL signal) according to the NR.
  • the wireless transmission unit 210 and the wireless reception unit 220 execute wireless communication via a control channel or a data channel.
  • Control channels include PDCCH (Physical Downlink Control Channel), PUCCH (Physical Uplink Control Channel), RACH (Random Access Channel, Random Access Radio Network Temporary Identifier (RA-RNTI), Downlink Control Information (DCI)), and Physical. Broadcast Channel (PBCH) etc. are included.
  • PDCCH Physical Downlink Control Channel
  • PUCCH Physical Uplink Control Channel
  • RACH Random Access Channel
  • DCI Downlink Control Information
  • PBCH Broadcast Channel
  • the data channels include PDSCH (Physical Downlink Shared Channel) and PUSCH (Physical Downlink Shared Channel).
  • PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Downlink Shared Channel
  • the wireless receiving unit 220 constitutes a receiving unit that receives synchronization information indicating that the serving cell and the adjacent cell using a frequency different from the serving cell are synchronized.
  • the synchronization information will be referred to as "different frequency synchronization IE" for convenience.
  • the different frequency synchronization IE may actually use the same name as the above-mentioned deliveSSB-IndexFromCell, or a new name may be used.
  • the serving cell may be simply interpreted as a cell to which the UE 200 is connected, but more strictly speaking, in the case of an RRC_CONNECTED UE that is not configured with carrier aggregation (CA), the serving cell that constitutes the primary cell is 1. There is only one. For RRC_CONNECTED UEs configured with CA, the serving cell may be interpreted to represent a set of one or more cells including the primary cell and all secondary cells.
  • CA carrier aggregation
  • the adjacent cell may be interpreted as a cell in which the UE 200 can measure the reception quality of the reference signal, or a cell adjacent to the serving cell (formed in the serving cell).
  • the SSB acquisition unit 230 acquires the SSB transmitted from the network. Specifically, the SSB acquisition unit 230 acquires the SSB that is periodically transmitted at a predetermined position on the wireless frame (for example, 5 ms in the first half). The acquired SSB information is used for detecting reference signals and PDCCH.
  • the quality measuring unit 240 measures the reception quality of the serving cell based on the control by the control unit 250. In addition, the quality measuring unit 240 measures the reception quality of the adjacent cell formed in the vicinity (or in the serving cell) of the serving cell.
  • the quality measurement unit 240 measures the Reference Signal Received Power (RSRP) of the serving cell and the adjacent cell.
  • RSRP Reference Signal Received Power
  • RSS Reference Signal Received Quality
  • SINR Signal-to-Interference plus Noise power Ratio
  • the control unit 250 controls each functional block constituting the UE 200.
  • the control unit 250 executes control regarding measurement of the serving cell and the adjacent cell.
  • control unit 250 when the control unit 250 receives a different frequency synchronization IE indicating that the serving cell and the adjacent cell using a different frequency from the serving cell are synchronized, the control unit 250 acquires the SSB index from the adjacent cell. It is possible to perform measurements on adjacent cells.
  • control unit 250 receives the different frequency synchronization IE, it is assumed that the adjacent cell is synchronized with the serving cell, and the acquisition of the SSB index (SSB index) transmitted from the adjacent cell is omitted.
  • SSB index SSB index
  • the measurement itself such as RSRP can be executed regardless of the presence or absence of SSB index. If the network has instructed UE200 to notify RSRP together with SSBindex, it is necessary to acquire (detect) the SSBindex by decoding PBCH, etc., but the control unit 250 can omit this operation. ..
  • control unit 250 when the control unit 250 receives the different frequency synchronous IE, it may acquire only the index of the SSB of any of the plurality of adjacent cells (when the SSB can be received from the plurality of adjacent cells). That is, the control unit 250 assumes that the other adjacent cells for which the acquisition of the SSB is omitted are synchronized with the serving cell or the other adjacent cells for which the SSB has been acquired.
  • control unit 250 when the control unit 250 receives the different frequency synchronous IE, it may acquire only the SSB index (SSB index) from the serving cell and derive the SSB index of the adjacent cell from the value of the SSB index.
  • SSB index the SSB index
  • control unit 250 may acquire only the SSB index (SSB index) from the serving cell and derive the SSB index (SSB index) from the adjacent cell. In other words, the control unit 250 may omit the acquisition of the SSB index (SSB index) transmitted from the adjacent cell, assuming that the adjacent cell is synchronized with the serving cell.
  • SSB index SSB index
  • the control unit 250 can derive the SSB index from the adjacent cell by using the frame timing of the serving cell. Specifically, the control unit 250 identifies the transmission timing of the SSB from the adjacent cell based on the frame boundary of the serving cell and the SFN, and detects the index of the SSB from the adjacent cell.
  • FIG. 5 shows a communication sequence related to quality measurement of adjacent cells by UE200.
  • gNB100A which may be gNB100B
  • S10 MeasObjectNR
  • MeasObjectNR specifies information applicable to SSB intra-frequency / inter-frequency measurements and / or Channel State Information Reference Signal (CSI-RS) intra-frequency / inter-frequency measurements.
  • CSI-RS Channel State Information Reference Signal
  • the UE200 executes quality measurement based on the acquired contents of MeasObjectNR (S30). Specifically, the UE 200 acquires the SSB transmitted from the adjacent cell and measures the reception quality (RSPP, etc.) of the adjacent cell (which may include a serving cell).
  • S30 MeasObjectNR
  • the UE 200 acquires the SSB transmitted from the adjacent cell and measures the reception quality (RSPP, etc.) of the adjacent cell (which may include a serving cell).
  • UE200 sends a measurement report including the received quality of the measured adjacent cell to gNB100A (S40).
  • FIG. 6 shows a quality measurement operation flow of an adjacent cell by the UE 200. As shown in FIG. 6, UE200 acquires MeasObjectNR (S110).
  • MeasObjectNR includes different frequency synchronization IE (S120). As described above, it shows that the serving cell and the adjacent cell using a different frequency from the serving cell are synchronized, and the difference is that it is applied to the adjacent cell having a different frequency, but it is the same as the 3GPP Release 15 derivativeSSB-IndexFromCell. ..
  • MeasObjectNR includes different frequency synchronization IE
  • UE200 acquires only the SSB index (SSB index) of any of multiple adjacent cells, and omits detection for the other cells (S130).
  • the UE200 when the received MeasObjectNR includes the different frequency synchronization IE, the UE200 has the frequency and subcarrier interval (SCS) included in the serving cell setting information (ServingCellConfigCommon) as the frequency and SCS included in the MeasObjectNR. Check if it is the same as.
  • SCS subcarrier interval
  • 3GPP TS38.133 (Chapter 9.2.5) defines the following two patterns for intra-frequency measurements.
  • T identify_intra_without_index (T PSS / SSS_sync_intra + T SSB_measurement_period_intra ) ms
  • T identify_intra_with_index (T PSS / SSS_sync_intra + T SSB_measurement_period_intra + T SSB_time_index_intra ) ms Similar to the provisions of 3GPP TS38.133 (Chapter 9.2.5), when different frequency synchronization IE is included, even if it is set to send the measurement result of reception quality as a measurement report together with SSB index, it is always the above. (i), T identify_intra_without_index is applied (that is, T SSB_time_index_intra can be omitted).
  • the SSB index and / and the measurement result of the adjacent cell in which the SSB index is detected may be diverted.
  • UE200 gets the SSB index of all adjacent cells (S140). In this case, the UE 200 may assume that the adjacent cell is out of sync with the serving cell.
  • UE200 executes quality measurement of adjacent cells based on the acquired SSB index (S150).
  • FIG. 7 shows the processing content (No. 1) to be replaced with the processing of S130 of the operation example 1.
  • UE200 acquires only the SSB index (SSB index) of the serving cell (S130A).
  • the UE200 may consider the acquisition result of the SSB index in the serving cell as the SSB index of the adjacent cell using a different frequency.
  • FIG. 8 shows a processing content (No. 2) that can be replaced with the processing of S130 of the operation example 1.
  • UE200 acquires the frame timing of the serving cell (S131B). Specifically, as described above, the UE 200 specifies the frame boundary of the serving cell and the SFN.
  • the UE200 derives the SSB index (SSB index) of the adjacent cell based on the acquired frame timing of the serving cell (S132B). Specifically, the UE 200 identifies the transmission timing of the SSB from the adjacent cell based on the frame boundary of the serving cell and the SFN, and detects the index of the SSB from the adjacent cell.
  • SSB index SSB index
  • the UE200 may assume that the synchronization source, that is, the serving cell to be referred to is one of the following.
  • the following action / effect can be obtained.
  • the UE 200 when the UE 200 receives the different frequency synchronization IE, it can perform the measurement of the adjacent cell without acquiring the SSB index (SSB index) from the adjacent cell.
  • SSB index SSB index
  • the UE200 can omit the acquisition of the SSB index of the adjacent cell, and can realize efficient measurement of the adjacent cell.
  • the efficiency of quality measurement of adjacent cells can be further improved. As a result, it is possible to reduce the power consumption of the UE 200, shorten the measurement time, and improve the efficiency of network control.
  • the measurement result of reception quality is transmitted as a measurement report together with the SSB index for the adjacent cell.
  • the T identify_inter_with_index described above will always apply. Therefore, UE200 cannot omit T SSB_time_index_inter, and even if the serving cell and the adjacent cell using different frequencies are synchronized, the SSB index of the adjacent cell must be acquired, which is an unnecessary measurement (SSB). (Acquisition of index). According to UE200, such unnecessary measurements can be avoided.
  • the UE 200 when the UE 200 receives the different frequency synchronization IE, it suffices to acquire only the SSB index of any of a plurality of adjacent cells and use that value. Therefore, unnecessary measurement for adjacent cells can be avoided.
  • the UE 200 can acquire only the SSB index from the serving cell when it receives the different frequency synchronized IE. Therefore, the SSB index of the adjacent cell can be derived based on the SSB index of the serving cell, and unnecessary measurement can be avoided.
  • the SSB index from the adjacent cell can be derived by using the frame timing of the serving cell. Therefore, by deriving the SSB index of the adjacent cell from the frame timing of the serving cell, it is possible to improve the acquisition accuracy of the SSB index of the adjacent cell and avoid unnecessary measurement.
  • the synchronization signal block from the adjacent cell may be applied to either SS or PBCH. That is, either SS or PBCH, or both, may be interpreted as a sync signal block.
  • the serving cell may be read as a connected cell, a connected cell, a primary cell, or the like.
  • the adjacent cell may be read as a neighboring cell, a peripheral cell, or the like.
  • each functional block is realized by any combination of at least one of hardware and software.
  • the method of realizing each functional block is not particularly limited. That is, each functional block may be realized by using one device that is physically or logically connected, or directly or indirectly (for example, by using two or more physically or logically separated devices). , Wired, wireless, etc.) and may be realized using these plurality of devices.
  • the functional block may be realized by combining the software with the one device or the plurality of devices.
  • Functions include judgment, decision, judgment, calculation, calculation, processing, derivation, investigation, search, confirmation, reception, transmission, output, access, solution, selection, selection, establishment, comparison, assumption, expectation, and assumption.
  • broadcasting notifying, communicating, forwarding, configuring, reconfiguring, allocating, mapping, assigning, etc., but only these.
  • a functional block that makes transmission function is called a transmitting unit or a transmitter.
  • the method of realizing each is not particularly limited.
  • FIG. 9 is a diagram showing an example of the hardware configuration of UE200.
  • the UE 200 may be configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.
  • the word “device” can be read as a circuit, device, unit, etc.
  • the hardware configuration of the device may be configured to include one or more of the devices shown in the figure, or may be configured not to include some of the devices.
  • Each functional block of UE200 (see FIG. 4) is realized by any hardware element of the computer device or a combination of the hardware elements.
  • each function in the UE 200 is such that the processor 1001 performs an operation by loading predetermined software (program) on the hardware such as the processor 1001 and the memory 1002 to control the communication by the communication device 1004 and the memory 1002. And by controlling at least one of reading and writing of data in the storage 1003.
  • predetermined software program
  • Processor 1001 operates, for example, an operating system to control the entire computer.
  • the processor 1001 may be composed of a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic unit, a register, and the like.
  • CPU central processing unit
  • the processor 1001 reads a program (program code), a software module, data, etc. from at least one of the storage 1003 and the communication device 1004 into the memory 1002, and executes various processes according to these.
  • a program program code
  • a program that causes a computer to execute at least a part of the operations described in the above-described embodiment is used.
  • the various processes described above may be executed by one processor 1001 or may be executed simultaneously or sequentially by two or more processors 1001.
  • Processor 1001 may be implemented by one or more chips.
  • the program may be transmitted from the network via a telecommunication line.
  • the memory 1002 is a computer-readable recording medium, and is composed of at least one such as ReadOnlyMemory (ROM), ErasableProgrammableROM (EPROM), Electrically ErasableProgrammableROM (EEPROM), and RandomAccessMemory (RAM). May be done.
  • the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
  • the memory 1002 can store a program (program code), a software module, or the like that can execute the method according to the embodiment of the present disclosure.
  • the storage 1003 is a computer-readable recording medium, for example, an optical disk such as a Compact Disc ROM (CD-ROM), a hard disk drive, a flexible disk, a photomagnetic disk (for example, a compact disk, a digital versatile disk, or a Blu-ray). It may consist of at least one (registered trademark) disk), smart card, flash memory (eg, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like.
  • Storage 1003 may be referred to as an auxiliary storage device.
  • the recording medium described above may be, for example, a database, server or other suitable medium containing at least one of the memory 1002 and the storage 1003.
  • the communication device 1004 is hardware (transmission / reception device) for communicating between computers via at least one of a wired network and a wireless network, and is also referred to as, for example, a network device, a network controller, a network card, a communication module, or the like.
  • Communication device 1004 includes, for example, a high frequency switch, a duplexer, a filter, a frequency synthesizer, etc. in order to realize at least one of frequency division duplex (FDD) and time division duplex (TDD). It may be composed of.
  • FDD frequency division duplex
  • TDD time division duplex
  • the input device 1005 is an input device (for example, keyboard, mouse, microphone, switch, button, sensor, etc.) that accepts input from the outside.
  • the output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that outputs to the outside.
  • the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
  • each device such as the processor 1001 and the memory 1002 is connected by the bus 1007 for communicating information.
  • the bus 1007 may be configured by using a single bus, or may be configured by using a different bus for each device.
  • the device includes hardware such as a microprocessor, a digital signal processor (Digital Signal Processor: DSP), an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), and a Field Programmable Gate Array (FPGA).
  • the hardware may implement some or all of each functional block.
  • processor 1001 may be implemented using at least one of these hardware.
  • information notification includes physical layer signaling (for example, Downlink Control Information (DCI), Uplink Control Information (UCI), upper layer signaling (eg, RRC signaling, Medium Access Control (MAC) signaling, broadcast information (Master Information Block)). (MIB), System Information Block (SIB)), other signals or combinations thereof.
  • DCI Downlink Control Information
  • UCI Uplink Control Information
  • RRC signaling may also be referred to as an RRC message, for example, RRC Connection Setup. ) Message, RRC Connection Reconfiguration message, etc. may be used.
  • LTE LongTermEvolution
  • LTE-A LTE-Advanced
  • SUPER3G IMT-Advanced
  • 4G 4th generation mobile communication system
  • 5G 5th generation mobile communication system
  • FutureRadioAccess FAA
  • NewRadio NR
  • W-CDMA registered trademark
  • GSM registered trademark
  • CDMA2000 Code Division Multiple Access 2000
  • UMB UltraMobile Broadband
  • IEEE802.11 Wi-Fi (registered trademark)
  • IEEE802.16 WiMAX®
  • IEEE802.20 Ultra-WideBand (UWB), Bluetooth®, and other systems that utilize appropriate systems and at least one of the next generation systems extended based on them.
  • a plurality of systems may be applied in combination (for example, a combination of at least one of LTE and LTE-A and 5G).
  • the specific operation performed by the base station in the present disclosure may be performed by its upper node (upper node).
  • various operations performed for communication with the terminal are performed by the base station and other network nodes other than the base station (for example, MME or). It is clear that it can be done by at least one of (but not limited to, S-GW, etc.).
  • S-GW network nodes
  • the case where there is one network node other than the base station is illustrated above, it may be a combination of a plurality of other network nodes (for example, MME and S-GW).
  • Information and signals can be output from the upper layer (or lower layer) to the lower layer (or upper layer).
  • Input / output may be performed via a plurality of network nodes.
  • the input / output information may be stored in a specific location (for example, memory) or may be managed using a management table.
  • the input / output information can be overwritten, updated, or added.
  • the output information may be deleted.
  • the input information may be transmitted to another device.
  • the determination may be made by a value represented by 1 bit (0 or 1), by a boolean value (Boolean: true or false), or by comparing numerical values (for example, a predetermined value). It may be done by comparison with the value).
  • the notification of predetermined information (for example, the notification of "being X") is not limited to the explicit notification, but is performed implicitly (for example, the notification of the predetermined information is not performed). May be good.
  • Software is an instruction, instruction set, code, code segment, program code, program, subprogram, software module, whether called software, firmware, middleware, microcode, hardware description language, or another name.
  • Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, features, etc. should be broadly interpreted to mean.
  • software, instructions, information, etc. may be transmitted and received via a transmission medium.
  • a transmission medium For example, a website, where the software uses at least one of wired technology (coaxial cable, fiber optic cable, twist pair, Digital Subscriber Line (DSL), etc.) and wireless technology (infrared, microwave, etc.).
  • wired technology coaxial cable, fiber optic cable, twist pair, Digital Subscriber Line (DSL), etc.
  • wireless technology infrared, microwave, etc.
  • the information, signals, etc. described in this disclosure may be represented using any of a variety of different techniques.
  • data, instructions, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these. It may be represented by a combination of.
  • a channel and a symbol may be a signal (signaling).
  • the signal may be a message.
  • the component carrier (CC) may be referred to as a carrier frequency, a cell, a frequency carrier, or the like.
  • system and “network” used in this disclosure are used interchangeably.
  • the information, parameters, etc. described in the present disclosure may be expressed using absolute values, relative values from predetermined values, or using other corresponding information. It may be represented.
  • the radio resource may be one indicated by an index.
  • Base Station BS
  • Wireless Base Station Wireless Base Station
  • NodeB NodeB
  • eNodeB eNodeB
  • gNodeB gNodeB
  • Base stations are sometimes referred to by terms such as macrocells, small cells, femtocells, and picocells.
  • the base station can accommodate one or more (for example, three) cells (also called sectors). When a base station accommodates multiple cells, the entire coverage area of the base station can be divided into multiple smaller areas, each smaller area being a base station subsystem (eg, a small indoor base station (Remote Radio)). Communication services can also be provided by Head: RRH).
  • a base station subsystem eg, a small indoor base station (Remote Radio)
  • Communication services can also be provided by Head: RRH).
  • cell refers to a base station that provides communication services in this coverage, and part or all of the coverage area of at least one of the base station subsystems.
  • MS mobile station
  • UE user equipment
  • terminal terminal
  • Mobile stations can be subscriber stations, mobile units, subscriber units, wireless units, remote units, mobile devices, wireless devices, wireless communication devices, remote devices, mobile subscriber stations, access terminals, mobile terminals, wireless, depending on the trader. It may also be referred to as a terminal, remote terminal, handset, user agent, mobile client, client, or some other suitable term.
  • At least one of the base station and the mobile station may be called a transmitting device, a receiving device, a communication device, or the like.
  • At least one of the base station and the mobile station may be a device mounted on the mobile body, the mobile body itself, or the like.
  • the moving body may be a vehicle (eg, car, airplane, etc.), an unmanned moving body (eg, drone, self-driving car, etc.), or a robot (manned or unmanned). ) May be.
  • at least one of the base station and the mobile station includes a device that does not necessarily move during communication operation.
  • at least one of a base station and a mobile station may be an Internet of Things (IoT) device such as a sensor.
  • IoT Internet of Things
  • the base station in the present disclosure may be read as a mobile station (user terminal, the same applies hereinafter).
  • communication between a base station and a mobile station has been replaced with communication between a plurality of mobile stations (for example, it may be called Device-to-Device (D2D), Vehicle-to-Everything (V2X), etc.).
  • D2D Device-to-Device
  • V2X Vehicle-to-Everything
  • Each aspect / embodiment of the present disclosure may be applied to the configuration.
  • the mobile station may have the function of the base station.
  • words such as "up” and “down” may be read as words corresponding to communication between terminals (for example, "side”).
  • the uplink, downlink, and the like may be read as side channels.
  • the mobile station in the present disclosure may be read as a base station.
  • the base station may have the functions of the mobile station.
  • the radio frame may be composed of one or more frames in the time domain. Each one or more frames in the time domain may be referred to as a subframe. Subframes may further consist of one or more slots in the time domain.
  • the subframe may have a fixed time length (eg, 1 ms) that is independent of numerology.
  • the numerology may be a communication parameter that applies to at least one of the transmission and reception of a signal or channel.
  • Numerology includes, for example, SubCarrier Spacing (SCS), bandwidth, symbol length, cyclic prefix length, transmission time interval (TTI), number of symbols per TTI, wireless frame configuration, transmission / reception.
  • SCS SubCarrier Spacing
  • TTI transmission time interval
  • At least one of a specific filtering process performed by the machine in the frequency domain, a specific windowing process performed by the transmitter / receiver in the time domain, and the like may be indicated.
  • the slot may be composed of one or more symbols (Orthogonal Frequency Division Multiple Access (OFDM) symbol, Single Carrier Frequency Division Multiple Access (SC-FDMA) symbol, etc.) in the time domain. Slots may be unit of time based on numerology.
  • OFDM Orthogonal Frequency Division Multiple Access
  • SC-FDMA Single Carrier Frequency Division Multiple Access
  • the slot may include a plurality of mini slots. Each minislot may consist of one or more symbols in the time domain. Further, the mini slot may be called a sub slot. A minislot may consist of a smaller number of symbols than the slot.
  • PDSCH (or PUSCH) transmitted in time units larger than the minislot may be referred to as PDSCH (or PUSCH) mapping type A.
  • PDSCH (or PUSCH) transmitted using the minislot may be referred to as PDSCH (or PUSCH) mapping type B.
  • the wireless frame, subframe, slot, mini slot and symbol all represent the time unit when transmitting a signal.
  • the radio frame, subframe, slot, minislot and symbol may have different names corresponding to each.
  • one subframe may be referred to as a transmission time interval (TTI)
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI transmission time interval
  • TTI slot or one minislot
  • at least one of the subframe and TTI may be a subframe (1ms) in existing LTE, a period shorter than 1ms (eg, 1-13 symbols), or a period longer than 1ms. It may be.
  • the unit representing TTI may be called a slot, a mini slot, or the like instead of a subframe.
  • TTI refers to, for example, the minimum time unit of scheduling in wireless communication.
  • the base station schedules each user terminal to allocate wireless resources (frequency bandwidth that can be used in each user terminal, transmission power, etc.) in TTI units.
  • the definition of TTI is not limited to this.
  • the TTI may be a transmission time unit such as a channel-encoded data packet (transport block), a code block, or a code word, or may be a processing unit such as scheduling or link adaptation.
  • the time interval for example, the number of symbols
  • the transport block, code block, code word, etc. may be shorter than the TTI.
  • one or more TTIs may be the minimum time unit for scheduling. Further, the number of slots (number of mini-slots) constituting the minimum time unit of the scheduling may be controlled.
  • a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel.8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, a long subframe, a slot, or the like.
  • TTIs shorter than normal TTIs may also be referred to as shortened TTIs, short TTIs, partial TTIs (partial or fractional TTIs), shortened subframes, short subframes, minislots, subslots, slots, and the like.
  • long TTIs eg, normal TTIs, subframes, etc.
  • short TTIs eg, shortened TTIs, etc.
  • TTI length the TTI length of long TTIs and 1 ms. It may be read as a TTI having the above TTI length.
  • a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers in the frequency domain.
  • the number of subcarriers contained in RB may be the same regardless of numerology, and may be, for example, 12.
  • the number of subcarriers contained in the RB may be determined based on numerology.
  • the time domain of RB may include one or more symbols, and may have a length of 1 slot, 1 mini slot, 1 subframe, or 1 TTI.
  • Each 1TTI, 1 subframe, etc. may be composed of one or a plurality of resource blocks.
  • One or more RBs include a physical resource block (Physical RB: PRB), a sub-carrier group (Sub-Carrier Group: SCG), a resource element group (Resource Element Group: REG), a PRB pair, an RB pair, etc. May be called.
  • Physical RB Physical RB: PRB
  • Sub-Carrier Group: SCG sub-carrier Group: SCG
  • REG resource element group
  • PRB pair an RB pair, etc. May be called.
  • the resource block may be composed of one or a plurality of resource elements (ResourceElement: RE).
  • RE resource elements
  • 1RE may be a radio resource area of 1 subcarrier and 1 symbol.
  • Bandwidth Part (which may also be called partial bandwidth, etc.) may represent a subset of consecutive common resource blocks (RBs) for a neurology in a carrier. Good.
  • the common RB may be specified by the index of the RB with respect to the common reference point of the carrier.
  • PRBs may be defined in a BWP and numbered within that BWP.
  • BWP may include BWP for UL (UL BWP) and BWP for DL (DL BWP).
  • BWP for UL
  • DL BWP BWP for DL
  • One or more BWPs may be set in one carrier for the UE.
  • At least one of the configured BWPs may be active, and the UE may not expect to send or receive a given signal / channel outside the active BWP.
  • “cell”, “carrier” and the like in this disclosure may be read as “BWP”.
  • the above-mentioned structures such as wireless frames, subframes, slots, mini slots and symbols are merely examples.
  • the number of subframes contained in a wireless frame the number of slots per subframe or wireless frame, the number of minislots contained within a slot, the number of symbols and RBs contained in a slot or minislot, included in RB.
  • the number of subcarriers, the number of symbols in the TTI, the symbol length, the cyclic prefix (CP) length, and other configurations can be changed in various ways.
  • connection means any direct or indirect connection or connection between two or more elements, and each other. It can include the presence of one or more intermediate elements between two “connected” or “combined” elements.
  • the connection or connection between the elements may be physical, logical, or a combination thereof.
  • connection may be read as "access”.
  • the two elements use at least one of one or more wires, cables and printed electrical connections, and, as some non-limiting and non-comprehensive examples, the radio frequency domain.
  • Electromagnetic energies with wavelengths in the microwave and light (both visible and invisible) regions can be considered to be “connected” or “coupled” to each other.
  • the reference signal can also be abbreviated as Reference Signal (RS), and may be called a pilot (Pilot) depending on the applicable standard.
  • RS Reference Signal
  • Pilot pilot
  • references to elements using designations such as “first”, “second” as used in this disclosure does not generally limit the quantity or order of those elements. These designations can be used in the present disclosure as a convenient way to distinguish between two or more elements. Thus, references to the first and second elements do not mean that only two elements can be adopted there, or that the first element must somehow precede the second element.
  • determining and “determining” used in this disclosure may include a wide variety of actions.
  • “Judgment” and “decision” are, for example, judgment (judging), calculation (calculating), calculation (computing), processing (processing), derivation (deriving), investigation (investigating), search (looking up, search, inquiry). It may include (eg, searching in a table, database or another data structure), ascertaining as “judgment” or “decision”.
  • judgment and “decision” are receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (Accessing) (for example, accessing data in memory) may be regarded as “judgment” or “decision”.
  • judgment and “decision” mean that “resolving”, “selecting”, “choosing”, “establishing”, “comparing”, etc. are regarded as “judgment” and “decision”. Can include. That is, “judgment” and “decision” may include that some action is regarded as “judgment” and “decision”. Further, “judgment (decision)” may be read as “assuming”, “expecting”, “considering” and the like.
  • the term "A and B are different” may mean “A and B are different from each other”.
  • the term may mean that "A and B are different from C”.
  • Terms such as “separate” and “combined” may be interpreted in the same way as “different”.
  • Wireless communication system 20 Wireless access network 100A, 100B gNB 200 UE 210 Wireless transmitter 220 Wireless receiver 230 SSB acquisition unit 240 Quality measurement unit 250 Control unit 1001 Processor 1002 Memory 1003 Storage 1004 Communication device 1005 Input device 1006 Output device 1007 Bus

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

Abstract

Un terminal reçoit un IE de synchronisation de fréquence différente indiquant qu'une cellule de desserte et une cellule adjacente qui utilise une fréquence différente de celle de la cellule de desserte se synchronisent l'une avec l'autre. Le terminal, lors de la réception de l'IE de synchronisation de fréquence différente, sans acquérir un indice d'un bloc de signal de synchronisation (SSB) provenant de la cellule adjacente, exécute une mesure de la cellule adjacente.　
PCT/JP2019/026387 2019-07-02 2019-07-02 Terminal WO2021001946A1 (fr)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11516683B2 (en) * 2018-01-11 2022-11-29 Ntt Docomo, Inc. Terminal, radio communication method, base station and system for measurements using a synchronization signal block
EP4167640A1 (fr) * 2021-10-18 2023-04-19 MediaTek Inc. Changement de synchronisation et nouvelle procédure de mobilité radio
WO2024060137A1 (fr) * 2022-09-22 2024-03-28 Mavenir Systems, Inc. Procédé pour améliorer le sinr d'un ssb nr 5g à l'aide d'un décalage temporel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Enhancements to initial access procedure", 3GPP TSG RAN WG1 #97 R1-1907455, 13 May 2019 (2019-05-13), pages 1 - 3, XP051728886 *
SAMSUNG: "Introducing T312 for Pcell in NR", 3GPP TSG RAN WG2 #105BIS R2-1905149, 12 April 2019 (2019-04-12), pages 8 - 11 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11516683B2 (en) * 2018-01-11 2022-11-29 Ntt Docomo, Inc. Terminal, radio communication method, base station and system for measurements using a synchronization signal block
EP4167640A1 (fr) * 2021-10-18 2023-04-19 MediaTek Inc. Changement de synchronisation et nouvelle procédure de mobilité radio
WO2024060137A1 (fr) * 2022-09-22 2024-03-28 Mavenir Systems, Inc. Procédé pour améliorer le sinr d'un ssb nr 5g à l'aide d'un décalage temporel

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