JP6573874B2 - 時分割ロングタームエボリューション(td−lte)フレーム構造の修正 - Google Patents

時分割ロングタームエボリューション(td−lte)フレーム構造の修正 Download PDF

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JP6573874B2
JP6573874B2 JP2016516913A JP2016516913A JP6573874B2 JP 6573874 B2 JP6573874 B2 JP 6573874B2 JP 2016516913 A JP2016516913 A JP 2016516913A JP 2016516913 A JP2016516913 A JP 2016516913A JP 6573874 B2 JP6573874 B2 JP 6573874B2
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extended
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JP2016536832A (ja
JP2016536832A5 (OSRAM
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リウ、ルオヘン
ナムゴーング、ジューン
ラジャゴパラン、ベンカトラマン
ジャヤラマン、スリカント
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Qualcomm Inc
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Qualcomm Inc
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • H04W72/044Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446Resources in time domain, e.g. slots or frames
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/14Relay systems
    • H04B7/15Active relay systems
    • H04B7/185Space-based or airborne stations; Stations for satellite systems
    • H04B7/18502Airborne stations
    • H04B7/18506Communications with or from aircraft, i.e. aeronautical mobile service
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/24Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H04B7/2656Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA] for structure of frame, burst
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04JMULTIPLEX COMMUNICATION
    • H04J3/00Time-division multiplex systems
    • H04J3/02Details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867Arrangements specially adapted for the transmitter end
    • H04L1/1887Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048Allocation of pilot signals, i.e. of signals known to the receiver
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055Physical resource allocation for ACK/NACK
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0058Allocation criteria
    • H04L5/0069Allocation based on distance or geographical location
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0078Timing of allocation
    • H04L5/0082Timing of allocation at predetermined intervals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/14Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/0005Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1822Automatic repetition systems, e.g. Van Duuren systems involving configuration of automatic repeat request [ARQ] with parallel processes
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00Arrangements for detecting or preventing errors in the information received
    • H04L1/12Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829Arrangements specially adapted for the receiver end
    • H04L1/1854Scheduling and prioritising arrangements
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0026Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
JP2016516913A 2013-09-26 2014-09-19 時分割ロングタームエボリューション(td−lte)フレーム構造の修正 Expired - Fee Related JP6573874B2 (ja)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US201361883169P 2013-09-26 2013-09-26
US61/883,169 2013-09-26
US14/105,106 2013-12-12
US14/105,106 US20150085834A1 (en) 2013-09-26 2013-12-12 Time division long term evolution (td-lte) frame structure modification
PCT/US2014/056674 WO2015047917A1 (en) 2013-09-26 2014-09-19 Time division long term evolution (td-lte) frame structure modification

Publications (3)

Publication Number Publication Date
JP2016536832A JP2016536832A (ja) 2016-11-24
JP2016536832A5 JP2016536832A5 (OSRAM) 2017-10-05
JP6573874B2 true JP6573874B2 (ja) 2019-09-11

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JP2016516913A Expired - Fee Related JP6573874B2 (ja) 2013-09-26 2014-09-19 時分割ロングタームエボリューション(td−lte)フレーム構造の修正
JP2016516859A Ceased JP2016538739A (ja) 2013-09-26 2014-09-19 時分割ロングタームエボリューション(td−lte)フレーム構造

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US (2) US20150085834A1 (OSRAM)
EP (2) EP3050225A1 (OSRAM)
JP (2) JP6573874B2 (OSRAM)
KR (1) KR20160062072A (OSRAM)
CN (2) CN105580290A (OSRAM)
BR (1) BR112016006530A2 (OSRAM)
WO (2) WO2015047917A1 (OSRAM)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106063149B (zh) 2013-12-04 2017-09-26 瑞典爱立信有限公司 时分双工系统中的下行链路子帧缩短方法和装置
EP3832905B1 (en) * 2013-12-04 2023-09-27 Telefonaktiebolaget LM Ericsson (publ) Uplink subframe shortening in time-division duplex (tdd) systems
US9876666B2 (en) * 2014-01-24 2018-01-23 Lg Electronics Inc. Method and apparatus for acquiring synchronization by device-to-device terminal in wireless communication system
JP6362118B2 (ja) * 2014-05-15 2018-07-25 ホアウェイ・テクノロジーズ・カンパニー・リミテッド データ送信装置及び方法
US10033513B2 (en) * 2015-02-09 2018-07-24 Huawei Technologies Co., Ltd. Channel impulse response estimation for full-duplex communication networks
CN105991229B (zh) * 2015-02-16 2020-02-11 电信科学技术研究院 一种时分双工系统中的数据传输方法及装置
US10075970B2 (en) 2015-03-15 2018-09-11 Qualcomm Incorporated Mission critical data support in self-contained time division duplex (TDD) subframe structure
US10342012B2 (en) 2015-03-15 2019-07-02 Qualcomm Incorporated Self-contained time division duplex (TDD) subframe structure
US9936519B2 (en) 2015-03-15 2018-04-03 Qualcomm Incorporated Self-contained time division duplex (TDD) subframe structure for wireless communications
WO2016161438A1 (en) * 2015-04-03 2016-10-06 Dali Systems Co. Ltd. Method and system for link synchronization in an lte-tdd architecture
CN106160838B (zh) * 2015-04-16 2020-02-07 电信科学技术研究院 一种传输数据的方法和设备
US9814058B2 (en) * 2015-05-15 2017-11-07 Qualcomm Incorporated Scaled symbols for a self-contained time division duplex (TDD) subframe structure
CN107852271B (zh) * 2015-05-15 2021-04-20 瑞典爱立信有限公司 用于跨多个子帧接收或传送下行链路传送的方法和装置
CN112242897B (zh) 2015-06-24 2022-02-18 中兴通讯股份有限公司 一种传输信号的方法和装置
US10693574B2 (en) * 2015-07-02 2020-06-23 Qualcomm Incorporated Method and apparatus for efficient data transmissions in half-duplex communication systems with large propagation delays
US9992790B2 (en) 2015-07-20 2018-06-05 Qualcomm Incorporated Time division duplex (TDD) subframe structure supporting single and multiple interlace modes
US10542541B2 (en) * 2015-08-19 2020-01-21 Qualcomm, Incorporated Re-contention-based co-existence on a shared communication medium
US10356816B2 (en) * 2015-08-19 2019-07-16 Qualcomm Incorporated Re-contention-based co-existence on a shared communication medium
US10091789B2 (en) * 2015-08-19 2018-10-02 Qualcomm, Incorporated Re-contention-based co-existence on a shared communication medium
WO2017107195A1 (zh) * 2015-12-25 2017-06-29 海能达通信股份有限公司 一种lte-tdd系统中的数据调度方法、装置和基站
KR102410282B1 (ko) * 2016-04-05 2022-06-17 한국전자통신연구원 확장 상향링크 서브프레임을 이용한 상향링크 전송 방법 및 장치
CN105818961A (zh) * 2016-05-13 2016-08-03 黄剑锋 一种多天线机身融合无人机
KR102327817B1 (ko) * 2016-06-01 2021-11-19 한국전자통신연구원 고속 열차 통신 네트워크의 신호 송수신 방법 및 장치
CN109716840A (zh) * 2016-09-28 2019-05-03 华为技术有限公司 数据传输方法、基站及用户设备
WO2018137150A1 (zh) * 2017-01-24 2018-08-02 华为技术有限公司 一种调谐方法及装置
GB2559382B (en) * 2017-02-03 2021-10-20 Tcl Communication Ltd Systems and methods for cell range extension
US10548153B2 (en) * 2017-04-04 2020-01-28 Qualcomm Incorporated Methods and apparatus for supporting frequency division multiplexing of multiple waveforms
WO2018218507A1 (en) 2017-05-31 2018-12-06 SZ DJI Technology Co., Ltd. Information broadcasting method and system
US10965360B2 (en) * 2017-08-23 2021-03-30 Qualcomm Incorporated Methods and apparatus related to beam refinement
WO2019218108A1 (en) * 2018-05-14 2019-11-21 Nec Corporation Sounding reference signal transmission
GB2582136B (en) * 2019-03-11 2022-08-03 Airspan Ip Holdco Llc Timing adjustment within a wireless communication system for a moving vehicle
CN113647178B (zh) * 2019-04-01 2022-07-01 日立能源瑞士股份公司 用于工业机器到机器通信的包括传播延迟感知调度的无线tdma调度的方法和系统
RU2763775C1 (ru) * 2019-07-26 2022-01-11 Гуандун Оппо Мобайл Телекоммьюникейшнз Корп., Лтд. Способ и устройство беспроводной связи
CN114424644B (zh) * 2019-08-16 2025-06-10 高通股份有限公司 空对地通信调度
CN115250132B (zh) * 2021-04-25 2025-02-21 华为技术有限公司 天线模式的选择方法和选择装置
CN117499003A (zh) * 2022-07-20 2024-02-02 华为技术有限公司 通信方法、装置、设备以及存储介质
EP4666748A1 (en) * 2023-02-17 2025-12-24 Telefonaktiebolaget LM Ericsson (publ) Systems and methods for optimization of time division duplex slot utilization for air to ground

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5959980A (en) * 1995-06-05 1999-09-28 Omnipoint Corporation Timing adjustment control for efficient time division duplex communication
US6633559B1 (en) * 1999-08-11 2003-10-14 Ericsson Inc. Apparatus and methods for extended base station range using staggered uplink frame structures
EP1213855A1 (en) * 2000-12-08 2002-06-12 Lucent Technologies Inc. Frame structure for TDD telecommunication systems
KR100547717B1 (ko) * 2003-01-29 2006-01-31 삼성전자주식회사 하이브리드 듀플렉싱 통신 방식을 제공하기 위한 무선통신시스템 및 방법
US20050157694A1 (en) * 2004-01-21 2005-07-21 Nec Laboratories America, Inc. Time division duplex system and method with improved guard time
EP2104984A4 (en) * 2007-01-15 2012-12-26 Ericsson Telefon Ab L M METHOD AND DEVICE FOR ENHANCED PERFORMANCE IN A WIRELESS ACCESS TIME TIME DIVISION DUPLEX SYSTEM
US8155093B2 (en) * 2007-08-01 2012-04-10 Harris Corporation Mobile ad-hoc network providing desired link delay offset without guard times and related methods
CN101414902B (zh) * 2007-10-16 2010-05-12 大唐移动通信设备有限公司 长期演进时分双工系统的传输方法及装置
CN101159483B (zh) * 2007-10-28 2013-05-08 中兴通讯股份有限公司 一种时分双工系统信号的传输方法及其采用的帧结构
CN101425839B (zh) * 2007-10-31 2011-09-14 电信科学技术研究院 一种确定数据发送偏移量的方法、系统和装置
EP2234292B1 (en) * 2007-11-02 2014-08-27 China Academy of Telecommunications Technology A method and an apparatus for determining the radio frame structure of time division duplex system
US8457032B2 (en) * 2007-11-02 2013-06-04 China Academy Of Telecommunications Technology Method and apparatus for data transmission in a time division duplexing system
CN101425844B (zh) * 2007-11-02 2013-03-20 电信科学技术研究院 一种时分双工系统的数据传输方法和系统
US7978610B1 (en) * 2008-01-24 2011-07-12 L-3 Communications Corp. Method for asynchronous transmission of communication data between periodically blanked terminals
US8130680B1 (en) * 2008-01-24 2012-03-06 L-3 Communications, Corp. Method for timing a pulsed communication system
US9184899B2 (en) * 2009-10-14 2015-11-10 Qualcomm Incorporated Downlink association set for uplink ACK/NACK in time division duplex system
EP2727305A4 (en) * 2011-07-01 2015-01-07 Intel Corp LAYER SHIFT IN OPEN LOOP MIMO COMMUNICATIONS
WO2013027985A2 (ko) * 2011-08-23 2013-02-28 엘지전자 주식회사 무선 통신 시스템에서 동적 서브프레임 변경을 위한 harq 버퍼 운용 방법 및 이를 위한 장치
KR20130069284A (ko) * 2011-12-16 2013-06-26 주식회사 팬택 송수신 포인트, 송수신 포인트의 타이밍 설정 방법, 단말, 및 단말의 pdsch a/n 전송 방법
JP6006336B2 (ja) * 2012-02-03 2016-10-12 インターデイジタル パテント ホールディングス インコーポレイテッド 同じスペクトルで動作するワイヤレス送信/受信ユニット(wtru)同士の共存のための方法および装置
CN103326806B (zh) * 2012-03-19 2016-08-03 电信科学技术研究院 一种下行控制信令的传输方法及装置
CN103906261B (zh) * 2012-12-28 2018-06-05 中兴通讯股份有限公司 随机接入前导处理方法及装置
US9319188B2 (en) * 2013-01-17 2016-04-19 Sharp Laboratories Of America, Inc. Systems and methods for special subframe configuration for carrier aggregation
US9510389B2 (en) * 2013-09-26 2016-11-29 Blackberry Limited Discontinuous reception configuration

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Publication number Publication date
US20150085834A1 (en) 2015-03-26
JP2016536832A (ja) 2016-11-24
CN105580291B (zh) 2019-08-20
BR112016006530A2 (pt) 2017-08-01
WO2015047917A1 (en) 2015-04-02
CN105580291A (zh) 2016-05-11
JP2016538739A (ja) 2016-12-08
US20150085840A1 (en) 2015-03-26
CN105580290A (zh) 2016-05-11
KR20160062072A (ko) 2016-06-01
EP3050225A1 (en) 2016-08-03
EP3050226A1 (en) 2016-08-03
EP3050226B1 (en) 2019-06-12
WO2015047916A1 (en) 2015-04-02

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