JP2020025340A - ユーザ端末及び無線通信方法 - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/14—Spectrum sharing arrangements between different networks
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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
- H04L5/0001—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
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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
- H04L5/0001—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
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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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
- H04L5/0091—Signaling for the administration of the divided path
- H04L5/0096—Indication of changes in allocation
- H04L5/0098—Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
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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
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/32—Hierarchical cell structures
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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
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0808—Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
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Abstract
Description
第1の実施形態では、センシングパターンは、TDD UL/DL構成と関連付けられている。言い換えると、第1の実施形態は、LBTを行うアンライセンスバンドがTDDキャリアである場合に適用することができる。
第2の実施形態では、センシングパターンは、TDD UL/DL構成と関連付けられていない。この場合、ユーザ端末は、暗黙的にセンシングパターンを判断して用いるか、明示的に通知されるセンシングパターンを用いる。
上記第1及び第2の実施形態では、センシングサブフレームを準静的(semi-statc)に設定する方法について説明した。これらの実施形態ではセンシングサブフレームはUL−LBTに使うことを想定しているため、ULデータの少ない(又は無い)端末にとっては、センシングサブフレームでLBTを実施することは無駄である。多くの場合、トラフィックはDL偏重であるため、例えば図6のConfig. 2の構成のように、20%のリソースをUL−LBTに使うのは無駄が大きい。
(Alt. 1)現在のサブフレームを特別サブフレームと認識して、UL−LBTを保留(pending)し、DL受信を実施する、
(Alt. 2)現在のサブフレームをセンシングサブフレームと認識して、DL受信を諦め、UL−LBTを実施する。
ここで、DL受信では、従来の特別サブフレームにおけるDwPTSと同様にしてPDSCHを受信し、復調する。なお、Alt. 2を実行する場合、DL受信を諦めたことを無線基地局に知らせるため、所定のタイミングでNACKを送信する構成とすることが好ましい。
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、上記第1−第3の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してもよいし、組み合わせて適用してもよい。
Claims (4)
- センシングの構成に関する情報に基づいて、所定の期間を決定する制御部と、
前記所定の期間において、信号の送信前にセンシングを行う受信部と、を有し、
前記所定の期間は、Physical Uplink Shared Channel(PUSCH)に関する所定の情報を送信する期間を含むことを特徴とするユーザ端末。 - 前記センシングの構成に関する情報は、TDD UL/DL構成と関連付けられていることを特徴とする請求項1に記載のユーザ端末。
- 前記センシングの構成に関する情報は、前記所定の期間の開始オフセットと、周期と、に関連付けられるインデックスであることを特徴とする請求項1に記載のユーザ端末。
- センシングの構成に関する情報に基づいて、所定の期間を決定する工程と、
前記所定の期間において、信号の送信前にセンシングを行う工程と、を有し、
前記所定の期間は、Physical Uplink Shared Channel(PUSCH)に関する所定の情報を送信する期間を含むことを特徴とするユーザ端末における無線通信方法。
Applications Claiming Priority (2)
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JP2014156209 | 2014-07-31 | ||
JP2014156209 | 2014-07-31 |
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JP2016538231A Division JPWO2016017355A1 (ja) | 2014-07-31 | 2015-07-01 | ユーザ端末、無線基地局、無線通信方法及び無線通信システム |
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JP2020025340A true JP2020025340A (ja) | 2020-02-13 |
JP6873214B2 JP6873214B2 (ja) | 2021-05-19 |
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JP2016538231A Pending JPWO2016017355A1 (ja) | 2014-07-31 | 2015-07-01 | ユーザ端末、無線基地局、無線通信方法及び無線通信システム |
JP2019205979A Active JP6873214B2 (ja) | 2014-07-31 | 2019-11-14 | 端末、無線通信方法及びシステム |
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Country Status (4)
Country | Link |
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US (2) | US20170223550A1 (ja) |
JP (2) | JPWO2016017355A1 (ja) |
CN (2) | CN111935720A (ja) |
WO (1) | WO2016017355A1 (ja) |
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US11452091B2 (en) * | 2016-02-04 | 2022-09-20 | Acer Incorporated | Device and method of handling hybrid automatic repeat request transmission |
CN107295694B (zh) * | 2016-03-30 | 2021-07-06 | 上海诺基亚贝尔股份有限公司 | 一种在基于eLAA的通信系统中用于实施上行信道接入的方法 |
JP6904969B2 (ja) * | 2016-03-31 | 2021-07-21 | 華為技術有限公司Huawei Technologies Co.,Ltd. | 無線通信方法、基地局、及び端末 |
JP6239672B2 (ja) * | 2016-03-31 | 2017-11-29 | 株式会社Nttドコモ | ユーザ端末、無線基地局及び無線通信方法 |
US10420135B2 (en) | 2016-04-01 | 2019-09-17 | HFI Innovation | Physical random access channel design in eLAA |
WO2017167746A1 (en) * | 2016-04-01 | 2017-10-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Methods for controlling relative measurements in the presence of lbt |
JP6404256B2 (ja) * | 2016-04-14 | 2018-10-10 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
US10517021B2 (en) | 2016-06-30 | 2019-12-24 | Evolve Cellular Inc. | Long term evolution-primary WiFi (LTE-PW) |
KR20210022526A (ko) | 2018-06-20 | 2021-03-03 | 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 | 물리 랜덤 액세스 채널 전송을 위한 채널 액세스 방법, 장치 및 프로그램 |
JP2020053870A (ja) * | 2018-09-27 | 2020-04-02 | ソニー株式会社 | 通信装置、制御装置及び通信システム |
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CN112654099B (zh) * | 2020-12-04 | 2023-01-06 | 京信网络系统股份有限公司 | 基于lbt的空口侦听方法、装置、系统及介质 |
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2015
- 2015-07-01 CN CN202010737165.2A patent/CN111935720A/zh active Pending
- 2015-07-01 US US15/500,635 patent/US20170223550A1/en not_active Abandoned
- 2015-07-01 CN CN201580041235.8A patent/CN106576349A/zh active Pending
- 2015-07-01 JP JP2016538231A patent/JPWO2016017355A1/ja active Pending
- 2015-07-01 WO PCT/JP2015/068990 patent/WO2016017355A1/ja active Application Filing
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2019
- 2019-01-10 US US16/244,969 patent/US11218883B2/en active Active
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Publication number | Publication date |
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CN106576349A (zh) | 2017-04-19 |
JPWO2016017355A1 (ja) | 2017-06-15 |
US20190150000A1 (en) | 2019-05-16 |
CN111935720A (zh) | 2020-11-13 |
WO2016017355A1 (ja) | 2016-02-04 |
US20170223550A1 (en) | 2017-08-03 |
JP6873214B2 (ja) | 2021-05-19 |
US11218883B2 (en) | 2022-01-04 |
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