WO2016121914A1 - ユーザ端末、無線基地局及び無線通信方法 - Google Patents
ユーザ端末、無線基地局及び無線通信方法 Download PDFInfo
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- WO2016121914A1 WO2016121914A1 PCT/JP2016/052618 JP2016052618W WO2016121914A1 WO 2016121914 A1 WO2016121914 A1 WO 2016121914A1 JP 2016052618 W JP2016052618 W JP 2016052618W WO 2016121914 A1 WO2016121914 A1 WO 2016121914A1
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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
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
-
- 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
Definitions
- the present invention relates to a user terminal, a radio base station, and a radio communication method in a next-generation mobile communication system.
- LTE Rel One of the 10 to 12 broadband technologies is carrier aggregation (CA).
- CA carrier aggregation
- CC component carrier
- LTE Rel LTE Rel. This corresponds to 8 system bands.
- a network for example, a radio base station notifies a user terminal of a signal for dynamically changing the UL-DL configuration of each CC. Since the signal is premised on 5 CC or less, when CA of 6 CC or more is applied, communication may not be performed appropriately.
- LTE Rel LTE Rel.
- CA a multiple timing advance (MTA) that enables different timing control between CCs is introduced.
- the CA to which MTA is applied supports timing advance groups (TAG: Timing Advance Group) classified by transmission timing.
- TAG Timing Advance Group
- the signal transmission timing is controlled for each TAG by the scheduler of one radio base station.
- TAG Timing Advance Group
- RRH Remote Radio Head
- LTE Rel. 10-12 the number of CCs that can be set per user terminal is limited to a maximum of five.
- extended carrier aggregation also called CA enhancement, enhanced CA, etc.
- CA enhancement also called CA enhancement, enhanced CA, etc.
- the user terminal dynamically sets (or resets or updates) the UL / DL ratio of the TDD cell to which eIMTA is applied by PDCCH (Physical Downlink Control Channel).
- PDCCH Physical Downlink Control Channel
- the radio base station dynamically signals the number (for example, 0 to 6) of the UL-DL configuration to be used from the TDD UL-DL configuration of FIG. 2 to the user terminal using the PDCCH.
- the UL / DL ratio can be changed independently for each cell (CC) having a different carrier.
- the UE checks whether there is dynamic TDD control using each eIMTA-RNTI at the time of DCI format 1C blind decoding.
- the UE may detect a plurality of eIMTA-RNTIs in one subframe.
- dynamic change signaling of a plurality of CCs is transmitted in temporally different subframes.
- the user terminal determines the DCI format 1C notified in the corresponding subframe for each serving cell, and operates the UL-DL configuration with a predetermined number of bit strings (for example, three bit strings) included in the DCI format 1C. Can be set automatically.
- the large-capacity DCI format may be, for example, the same payload (28 bits) as the DCI format 1A, or a DCI format of a length (96 bits) that allows dynamic TDD of all 32 CCs independently. A payload larger than 96 bits may be used.
- the PDCCH common search space can be used. 12 Can be controlled in the same way as CA's eIMTA. If the payload is larger than 96 bits, it can be controlled more flexibly. When the size of the dynamic change signaling is large (for example, larger than 96 bits), it may be transmitted in a user terminal specific search space (UE-SS: UE-specific Search Space) instead of the common search space.
- UE-SS user terminal specific search space
- the UL / DL subframe configuration that can be set by dynamic TDD is limited (restricted) by higher layer signaling (for example, RRC signaling).
- RRC signaling for example, RRC signaling
- dynamic change signaling can be reduced from the conventional 3 bits.
- the dynamic change signaling is 2 bits, 7 dynamic change signalings can be included with the maximum payload size (15 bits) of the DCI format 1C.
- FIG. 6B is a diagram showing an example of a DCI format 1C masked with eIMTA-RNTI when a limited UL-DL configuration as shown in FIG. 6A is adopted.
- the UL-DL configuration after DCI limitation used in a predetermined serving cell can be indicated by, for example, 2 bits.
- more dynamic change signaling can be included in the DCI format than in the past (Rel. 12).
- This allows the user terminal to dynamically set the UL-DL configuration for 6 or more CCs without increasing the number of bits for eIMTA signaling.
- the blind decoding operation performed by the user terminal is not different from the conventional dynamic change signaling detection operation (Rel. 12). Therefore, it is possible to dynamically set the UL-DL configuration for a larger number of cells with a processing load equivalent to that of the prior art.
- the UE may notify the network as capability information about information related to the number of eIMTA-RNTIs (for example, total number, maximum number, etc.) that can be detected in one subframe. Further, the UE may notify the network as capability information about information on the number of cells (for example, the total number, the maximum number, etc.) to which dynamic TDD can be applied separately. Further, the UE may notify the network as capability information about information regarding frequency bands to which dynamic TDD can be applied separately.
- the number of eIMTA-RNTIs for example, total number, maximum number, etc.
- the network may notify the network as capability information about information on the number of cells (for example, the total number, the maximum number, etc.) to which dynamic TDD can be applied separately.
- the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
- the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
- the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
- the radio base stations 10 that share and use the same unlicensed band are configured to be synchronized in time.
- downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by PDSCH. Also, MIB (Master Information Block) is transmitted by PBCH.
- PDSCH downlink shared channel
- PBCH Physical Broadcast Channel
- SIB System Information Block
- MIB Master Information Block
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), and a random access channel (PRACH) shared by each user terminal 20 are used. Physical Random Access Channel) is used.
- PUSCH Physical Uplink Shared Channel
- PUCCH Physical Uplink Control Channel
- PRACH random access channel
- Physical Random Access Channel Physical Random Access Channel
- User data and higher layer control information are transmitted by PUSCH.
- downlink radio quality information (CQI: Channel Quality Indicator), a delivery confirmation signal, and the like are transmitted by PUCCH.
- a random access preamble for establishing connection with a cell is transmitted by the PRACH.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access Control
- HARQ Hybrid Automatic Repeat reQuest
- the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
- the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
- the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
- the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device which is described based on common recognition in the technical field according to the present invention.
- the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
- FIG. 9 is a diagram illustrating an example of a functional configuration of the radio base station according to the present embodiment. Note that FIG. 9 mainly shows functional blocks of characteristic portions in the present embodiment, and the wireless base station 10 also has other functional blocks necessary for wireless communication. As shown in FIG. 9, the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. Yes.
- the baseband signal processing unit 104 includes a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305.
- the RRC signaling may include notifying the dynamic change signaling with a signal of a large capacity format as compared with the format used for the dynamic change signaling of the existing system (Rel. 12) (third Embodiment).
- the “notification to be notified” may be information indicating whether to notify, or information used for receiving a large format signal (for example, payload length, modulation scheme, code of large format) Or the like.
- control unit 301 uses Rel. As a downlink control signal including information related to the change of the UL-DL configuration. Control may be made so as to notify eIMTA signaling newly defined in 13 or later. For example, the control unit 301 performs control to notify the dynamic change signaling using a format having a larger payload than the dynamic change signaling of the existing system (Rel. 10 to 12) in which the number of CCs is 5 or less. May be.
- 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, a UL signal (uplink control signal, uplink data 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.
- FIG. 11 is a diagram illustrating an example of a functional configuration of the user terminal according to the present embodiment. Note that FIG. 11 mainly shows functional blocks of characteristic portions in the present embodiment, and the user terminal 20 also has other functional blocks necessary for wireless communication. As shown in FIG. 11, the baseband signal processing unit 204 included in the user terminal 20 includes a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. I have.
- the transmission signal generation unit 402 generates an uplink control signal related to a delivery confirmation signal (HARQ-ACK) or channel state information (CSI) based on an instruction from the control unit 401, for example.
- the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401.
- the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
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Abstract
Description
本発明の第1の実施形態では、ユーザ端末に対して、動的変更シグナリングの検出を行うための識別子(eIMTA-RNTI)を複数設定する。これにより、ユーザ端末は、サービングセル毎に、対応するeIMTA-RNTIでマスキングされるDCIフォーマット1Cを判断し、当該DCIフォーマット1Cに含まれる所定数のビット列(例えば、3ビット列)でUL-DL構成を動的に設定することができる。
本発明の第2の実施形態では、複数のCCの動的変更シグナリングを、時間的に異なるサブフレームで送信する。これにより、ユーザ端末は、サービングセル毎に、対応するサブフレームで通知されるDCIフォーマット1Cを判断し、当該DCIフォーマット1Cに含まれる所定数のビット列(例えば、3ビット列)でUL-DL構成を動的に設定することができる。
本発明の第3の実施形態では、複数のCCの動的変更シグナリングを、CCの設定数が5個以下となる既存システム(Rel.10~12)の動的変更シグナリングと比較してペイロードの大きい(容量の大きい)構成とする。当該ペイロードの大きい動的変更シグナリングは、Rel.13 eIMTAシグナリングと呼ばれてもよい。
本発明の第4の実施形態では、サービングセルあたりの動的変更シグナリングのビット数を削減する。これにより、動的変更シグナリングのオーバーヘッドを削減することができ、より多くのサービングセルの情報を動的変更シグナリングに含めることができる。
本発明の第5の実施形態では、eIMTAで設定する複数のCCをグルーピングするRRCシグナリングを用いる。これにより、1つの動的変更シグナリングで複数のCCのUL-DL構成を変更することができる。
UEは、上述の各実施形態のように、6CC以上のUL/DL構成の動的変更をサポートしていることを、無線基地局(ネットワーク)に通知してもよい。例えば、UEは、6CC以上のeIMTAをサポートすることを、能力情報(capability)として無線基地局に報告することができる。
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、本発明の上記実施形態に係る無線通信方法が適用される。なお、上記の各実施形態に係る無線通信方法は、それぞれ単独で適用されてもよいし、組み合わせて適用してもよい。
図8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、伝送路インターフェース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10は、本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。
Claims (10)
- 6個以上のコンポーネントキャリア(CC:Component Carrier)を利用して通信可能なユーザ端末であって、
所定の上位レイヤシグナリングと、UL-DL構成の変更に関する情報を含む下り制御信号と、を受信する受信部と、
前記UL-DL構成の変更に関する情報を用いて、CCのUL-DL構成を設定する制御部と、を有し、
前記制御部は、6個以上のCCから、前記UL-DL構成の変更に関する情報を用いて設定するCCを、前記所定の上位レイヤシグナリングに基づいて判断することを特徴とするユーザ端末。 - 前記所定の上位レイヤシグナリングは、前記下り制御信号の検出を行うための識別子を複数含むことを特徴とする請求項1に記載のユーザ端末。
- 前記所定の上位レイヤシグナリングは、所定のサブフレームで送信される前記下り制御信号により設定対象となるCCの情報を含むことを特徴とする請求項1に記載のユーザ端末。
- 前記所定の上位レイヤシグナリングは、前記下り制御信号が、DCI(Downlink Control Information)フォーマット1Cと比較して容量が大きいフォーマットを用いて通知される旨を含むことを特徴とする請求項1に記載のユーザ端末。
- 前記受信部は、DCIフォーマット1Cを用いて通知される下り制御信号を復号しないことを特徴とする請求項4に記載のユーザ端末。
- 前記受信部は、前記容量が大きいフォーマットを用いて通知される下り制御信号と、DCIフォーマット1Cを用いて通知される下り制御信号と、を復号することを特徴とする請求項4に記載のユーザ端末。
- 前記所定の上位レイヤシグナリングは、設定可能なUL-DL構成を限定する情報を含むことを特徴とする請求項1に記載のユーザ端末。
- 前記所定の上位レイヤシグナリングは、複数のCCをグルーピングする情報を含むことを特徴とする請求項1に記載のユーザ端末。
- 6個以上のコンポーネントキャリア(CC:Component Carrier)を利用するユーザ端末と通信可能な無線基地局であって、
前記ユーザ端末のUL-DL構成を制御する制御部と、
所定の上位レイヤシグナリングと、前記UL-DL構成の変更に関する情報を含む下り制御信号と、を送信する送信部と、
前記所定の上位レイヤシグナリングは、前記ユーザ端末において、6個以上のCCから、前記UL-DL構成の変更に関する情報を用いて設定するCCを判断するために用いられることを特徴とする無線基地局。 - 6個以上のコンポーネントキャリア(CC:Component Carrier)を利用して通信可能なユーザ端末の無線通信方法であって、
所定の上位レイヤシグナリングと、UL-DL構成の変更に関する情報を含む下り制御信号と、を受信する工程と、
前記UL-DL構成の変更に関する情報を用いて、CCのUL-DL構成を設定する工程と、を有し、
6個以上のCCから、前記UL-DL構成の変更に関する情報を用いて設定するCCを、前記所定の上位レイヤシグナリングに基づいて判断することを特徴とする無線通信方法。
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US15/545,568 US20170359806A1 (en) | 2015-01-29 | 2016-01-29 | User terminal, radio base station and radio communication method |
JP2016572173A JP6740139B2 (ja) | 2015-01-29 | 2016-01-29 | 端末、基地局及び無線通信方法 |
EP16743517.1A EP3253155A4 (en) | 2015-01-29 | 2016-01-29 | User terminal, wireless base station, and wireless communication method |
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WO2018173646A1 (ja) * | 2017-03-21 | 2018-09-27 | 三菱電機株式会社 | 通信システム |
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EP3783950A4 (en) * | 2018-04-17 | 2022-01-05 | Ntt Docomo, Inc. | USER END DEVICE |
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WO2024031291A1 (zh) * | 2022-08-08 | 2024-02-15 | 富士通株式会社 | 小区改变的方法及装置 |
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2016
- 2016-01-29 US US15/545,568 patent/US20170359806A1/en not_active Abandoned
- 2016-01-29 WO PCT/JP2016/052618 patent/WO2016121914A1/ja active Application Filing
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- 2016-01-29 EP EP16743517.1A patent/EP3253155A4/en not_active Withdrawn
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Cited By (5)
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WO2018173646A1 (ja) * | 2017-03-21 | 2018-09-27 | 三菱電機株式会社 | 通信システム |
JPWO2018173646A1 (ja) * | 2017-03-21 | 2020-01-30 | 三菱電機株式会社 | 通信システム |
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JPWO2016121914A1 (ja) | 2017-11-24 |
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