WO2018008574A1 - ユーザ端末および無線通信方法 - Google Patents
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- WO2018008574A1 WO2018008574A1 PCT/JP2017/024286 JP2017024286W WO2018008574A1 WO 2018008574 A1 WO2018008574 A1 WO 2018008574A1 JP 2017024286 W JP2017024286 W JP 2017024286W WO 2018008574 A1 WO2018008574 A1 WO 2018008574A1
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- signal
- synchronization signal
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- user terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
- H04W56/0015—Synchronization between nodes one node acting as a reference for the others
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/001—Synchronization between nodes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2602—Signal structure
- H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
- H04L27/2607—Cyclic extensions
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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
- H04L5/0078—Timing of allocation
- H04L5/0082—Timing of allocation at predetermined intervals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L7/00—Arrangements for synchronising receiver with transmitter
- H04L7/04—Speed or phase control by synchronisation signals
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/003—Arrangements to increase tolerance to errors in transmission or reception timing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
Definitions
- the present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system.
- LTE Long Term Evolution
- Non-Patent Document 1 LTE-Advanced
- FRA Full Radio Access
- 5G 5th generation mobile communication system
- NR New RAT (Radio Access Technology)
- a downlink (DL) and an uplink (UL: UL) are transmitted using a transmission time interval (TTI: Transmission Time Interval) of 1 [ms].
- TTI Transmission Time Interval
- Uplink or both of them are performed.
- the 1 [ms] TTI is a transmission time unit of one channel-encoded data packet, and is a processing unit such as scheduling and link adaptation.
- a TTI of 1 [ms] is also called a subframe, a subframe length, or the like.
- NR SS synchronization signal
- MIB future wireless communication system
- the frequency resource for transmitting the NR synchronization signal is always at the center of the system bandwidth, there is a possibility of problems in terms of forward compatibility due to lack of flexibility.
- the NR synchronization signal can be transmitted anywhere in the system bandwidth, the processing load when searching for the NR synchronization signal in the user terminal increases.
- the NR synchronization signal can be transmitted with a frequency resource other than the center within the system bandwidth (see FIG. 1), the user terminal receives MIB, PRACH (Physical Random Access Channel) transmission, or RRM (Radio Resource Management).
- MIB Physical Random Access Channel
- PRACH Physical Random Access Channel
- RRM Radio Resource Management
- the synchronization signal sequence is transmitted so that the user terminal can recognize the synchronization signal resource position (shift amount from the reference position) by detecting the synchronization signal. That is, the resource location is reported to the user terminal implicitly (Implicit) by the synchronization signal sequence pattern.
- the cyclic shift is not applied when the synchronization signal is transmitted in the central resource block.
- sequences # 0 to # N-1 are sequentially mapped to subcarriers and transmitted.
- m cyclic shifts are applied in units of resource blocks.
- n subcarriers are included in one resource block, n ⁇ m cyclic shifts are applied.
- the user terminal can recognize the shift amount of the time resource from the synchronization signal resource position, that is, the reference position, by receiving the synchronization signal to which m cyclic shifts are applied in resource block units.
- the embodiment 1-1 may be applied to notify the shift amount of the time resource from the reference position, or the embodiment 1-2 may be applied to notify the shift amount of the frequency resource from the reference position. May be.
- the resource with which the user terminal receives information (for example, MIB) is defined in the specification, for example.
- the received MIB includes resource position information of the MIB itself (for example, the shift amount or index of time or frequency resource from the reference position), the relative position between the MIB and the synchronization signal is known.
- the terminal can recognize the resource position of the synchronization signal.
- Example 2-1 As shown in FIG. 3, after detecting a synchronization signal, the user terminal receives a resource signal separated by a predetermined frequency resource from the detected synchronization signal, for example, a common control information (broadcast) channel.
- the user terminal recognizes the time index and the frequency index of the synchronization signal and / or the channel including the information from the received common control information (broadcast) channel.
- the frequency at which the user terminal searches for the synchronization signal may be on a predetermined channel raster that is a candidate for the center frequency of the NR carrier.
- the channel raster interval in NR may be different from the channel raster in LTE (100 [kHz]).
- the channel raster may be arranged only in a part of the band instead of the entire NR band.
- FIG. 6 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are applied. can do.
- DC dual connectivity
- a radio communication system 1 shown in FIG. 6 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. -12c). Moreover, the user terminal 20 is arrange
- the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12.
- the user terminal 20 is assumed to use the macro cell C1 and the small cell C2 simultaneously by CA or DC.
- the user terminal 20 may apply CA or DC using a plurality of cells (CC) (for example, 5 or less CCs, 6 or more CCs).
- CC cells
- an uplink shared channel (PUSCH) shared by each user terminal 20, an uplink control channel (PUCCH: Physical Uplink Control Channel), a random access channel (PRACH: Physical Random Access Channel) is used.
- PUSCH uplink shared channel
- PUCCH Physical Uplink Control Channel
- PRACH Physical Random Access Channel
- User data and higher layer control information are transmitted by PUSCH.
- downlink radio quality information CQI: Channel Quality Indicator
- delivery confirmation information and the like are transmitted by PUCCH.
- a random access preamble for establishing connection with a cell is transmitted by the PRACH.
- a cell-specific reference signal CRS
- CSI-RS channel state information reference signal
- DMRS demodulation reference signal
- PRS Positioning Reference Signal
- a measurement reference signal SRS: Sounding Reference Signal
- a demodulation reference signal DMRS
- the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
- the control unit (scheduler) 301 controls the entire radio base station 10.
- the control part 301 can be comprised from the controller, control circuit, or control apparatus demonstrated based on the common recognition in the technical field which concerns on this invention.
- the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
- the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
- the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when PUCCH including HARQ-ACK is received, HARQ-ACK is output to control section 301.
- the reception signal processing unit 304 outputs the reception signal and the signal after reception processing to the measurement unit 305.
- the control unit 401 controls the entire user terminal 20.
- the control unit 401 can be configured by a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the received signal processing unit 404 may be configured by a signal processor, a signal processing circuit or a signal processing device, and a measuring device, a measurement circuit or a measuring device which are described based on common recognition in the technical field according to the present invention. it can. Further, the reception signal processing unit 404 can constitute a reception unit according to the present invention.
- the channel and / or symbol may be a signal (signaling).
- the signal may be a message.
- the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
- a component carrier CC: Component Carrier
- CC Component Carrier
- 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 (subcarriers) in the frequency domain. Further, the RB may include one or a plurality of symbols in the time domain, and may have a length of 1 slot, 1 subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource blocks.
- the RB may be called a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, or the like.
- MS mobile station
- UE user equipment
- terminal may be used interchangeably.
- a base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
- NodeB NodeB
- eNodeB eNodeB
- access point transmission point
- reception point femtocell
- small cell small cell
- the specific operation assumed to be performed by the base station may be performed by the upper node in some cases.
- various operations performed for communication with a terminal are performed by the base station and one or more network nodes other than the base station (for example, It is obvious that the operation can be performed by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited to these) or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
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- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Synchronisation In Digital Transmission Systems (AREA)
Abstract
Description
第1の態様においては、ユーザ端末が同期信号の検出によって同期信号リソース位置(基準位置からのシフト量)を認識できるように同期信号系列を送信する。すなわち、ユーザ端末には、同期信号系列パターンによって黙示的(Implicit)にリソース位置が通知される。
同期信号系列の各サブキャリアへのマッピングにサブキャリア単位のサイクリックシフトを適用する。当該サイクリックシフト量は同期信号リソース位置、すなわち基準位置からの時間または周波数リソースのシフト量に応じて変更する。
同期信号系列の各サブキャリアへのマッピングにリソースブロック単位のサイクリックシフトを適用する。当該サイクリックシフト量は同期信号リソース位置、すなわち基準位置からの時間または周波数リソースのシフト量に応じて変更する。
実施例1-1および実施例1-2を組み合わせて適用し、同期信号の基準位置からの時間および周波数リソースのシフト量を通知する。
第2の態様においては、ユーザ端末が同期信号を検出した後、同期信号のリソースを基準として既知の所定量だけ相対的に離れたリソースで情報(たとえばMIB)を受信し、受信した情報から同期信号とその情報が含まれるチャネルの両方、またはいずれか一方のリソース位置(基準位置からのシフト量)を認識できるようにする。すなわち、ユーザ端末には、報知チャネル等を利用して明示的(Explicit)にリソース位置が通知される。
図3に示すように、ユーザ端末は、同期信号を検出した後、当該検出した同期信号から所定周波数リソース分離れたリソースの信号、たとえば共通制御情報(報知)チャネルを受信する。ユーザ端末は、受信した共通制御情報(報知)チャネルから、同期信号と当該情報が含まれるチャネルの両方、またはいずれか一方の、時間インデックスおよび周波数インデックスを認識する。
図4に示すように、ユーザ端末は、同期信号を検出した後、当該検出した同期信号から所定時間リソース分離れたリソースの信号、たとえば共通制御情報(報知)チャネルを受信する。ユーザ端末は、受信した共通制御情報(報知)チャネルから、同期信号と当該情報が含まれるチャネルの両方、またはいずれか一方の、時間インデックスおよび周波数インデックスを認識する。
図5に示すように、ユーザ端末は、同期信号を検出した後、当該検出した同期信号から所定の時間リソースおよび周波数リソース分離れたリソースの信号、たとえば共通制御情報(報知)チャネルを受信する。ユーザ端末は、受信した共通制御情報(報知)チャネルから、同期信号と当該情報が含まれるチャネルの両方、またはいずれか一方の、時間インデックスおよび周波数インデックスを認識する。
第3の態様においては、ユーザ端末が同期信号をサーチする範囲となる時間および周波数リソース群を、仕様やシグナリングにより限定可能とする。
以下、本発明の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本発明の上記各態様に係る無線通信方法のいずれかまたは組み合わせを用いて通信が行われる。
図7は、本発明の一実施形態に係る無線基地局の全体構成の一例を示す図である。無線基地局10は、複数の送受信アンテナ101と、アンプ部102と、送受信部103と、ベースバンド信号処理部104と、呼処理部105と、伝送路インタフェース106と、を備えている。なお、送受信アンテナ101、アンプ部102、送受信部103は、それぞれ1つ以上を含むように構成されればよい。
図9は、本発明の一実施形態に係るユーザ端末の全体構成の一例を示す図である。ユーザ端末20は、複数の送受信アンテナ201と、アンプ部202と、送受信部203と、ベースバンド信号処理部204と、アプリケーション部205と、を備えている。なお、送受信アンテナ201、アンプ部202、送受信部203は、それぞれ1つ以上を含むように構成されればよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェアおよび/またはソフトウェアの任意の組み合わせによって実現される。また、各機能ブロックの実現手段は特に限定されない。すなわち、各機能ブロックは、物理的および/または論理的に結合した1つの装置により実現されてもよいし、物理的および/または論理的に分離した2つ以上の装置を直接的および/または間接的に(たとえば、有線および/または無線)で接続し、これら複数の装置により実現されてもよい。
なお、本明細書で説明した用語および/または本明細書の理解に必要な用語については、同一のまたは類似する意味を有する用語と置き換えてもよい。たとえば、チャネルおよび/またはシンボルは信号(シグナリング)であってもよい。また、信号はメッセージであってもよい。参照信号は、RS(Reference Signal)と略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(CC:Component Carrier)は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (6)
- フレキシブルなリソースで送信された同期信号および/または共通制御情報チャネルを受信する受信部と、
前記同期信号または前記共通制御情報チャネルから、前記同期信号が送信されたリソース位置を認識する制御部と、を有することを特徴とするユーザ端末。 - 前記制御部が、前記同期信号に設定されたサイクリックシフト量によって、前記同期信号が送信されたリソース位置を認識することを特徴とする請求項1に記載のユーザ端末。
- 前記制御部が、サブキャリア単位で設定されたサイクリックシフトによって、前記同期信号の基準位置からの周波数リソースまたは時間リソースのシフト量を認識することを特徴とする請求項2に記載のユーザ端末。
- 前記制御部が、リソースブロック単位で設定されたサイクリックシフトによって、前記同期信号の基準位置からの時間リソースまたは周波数リソースのシフト量を認識することを特徴とする請求項2または請求項3に記載のユーザ端末。
- 前記受信部が、前記同期信号を受信した後に、
前記制御部が、前記同期信号がマッピングされたリソースから所定量だけ相対的に離れたリソースにおいて前記共通制御情報チャネルを受信するよう制御することを特徴とする請求項1に記載のユーザ端末。 - フレキシブルなリソースで送信された同期信号および共通制御情報チャネルを受信する工程と、
前記同期信号または前記共通制御情報チャネルから、前記同期信号が送信されたリソース位置を認識する工程と、を有することを特徴とする無線通信方法。
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BR112019000189-1A BR112019000189A2 (pt) | 2016-07-05 | 2017-07-03 | método de radiocomunicação e terminal de usuário |
EP17824178.2A EP3484112A4 (en) | 2016-07-05 | 2017-07-03 | USER TERMINAL, AND WIRELESS COMMUNICATION METHOD |
JP2018526351A JP7053464B2 (ja) | 2016-07-05 | 2017-07-03 | 端末、無線通信方法、基地局及びシステム |
RU2019101384A RU2741615C2 (ru) | 2016-07-05 | 2017-07-03 | Пользовательский терминал и способ радиосвязи |
CN201780041908.9A CN109417530B (zh) | 2016-07-05 | 2017-07-03 | 用户终端以及无线通信方法 |
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WO2020213126A1 (ja) * | 2019-04-18 | 2020-10-22 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
WO2021014507A1 (ja) * | 2019-07-19 | 2021-01-28 | 株式会社Nttドコモ | 端末及び無線通信方法 |
US20220322334A1 (en) * | 2019-08-14 | 2022-10-06 | Ntt Docomo, Inc. | Terminal and communication method |
US20220330230A1 (en) * | 2019-08-14 | 2022-10-13 | Ntt Docomo, Inc. | Terminal and communication method |
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CN112425126B (zh) * | 2018-07-24 | 2024-02-06 | 株式会社Ntt都科摩 | 用户装置和基站装置 |
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Also Published As
Publication number | Publication date |
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RU2019101384A (ru) | 2020-08-06 |
JPWO2018008574A1 (ja) | 2019-05-30 |
EP3484112A4 (en) | 2020-01-29 |
EP3484112A1 (en) | 2019-05-15 |
RU2741615C2 (ru) | 2021-01-27 |
BR112019000189A2 (pt) | 2019-04-24 |
US11147031B2 (en) | 2021-10-12 |
RU2019101384A3 (ja) | 2020-09-02 |
CN109417530B (zh) | 2022-05-17 |
CN109417530A (zh) | 2019-03-01 |
US20190239174A1 (en) | 2019-08-01 |
JP7053464B2 (ja) | 2022-04-12 |
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