RU2414051C1 - Распределение и отображение ресурсов в системе беспроводной связи - Google Patents

Распределение и отображение ресурсов в системе беспроводной связи Download PDF

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Publication number
RU2414051C1
RU2414051C1 RU2009129965A RU2009129965A RU2414051C1 RU 2414051 C1 RU2414051 C1 RU 2414051C1 RU 2009129965 A RU2009129965 A RU 2009129965A RU 2009129965 A RU2009129965 A RU 2009129965A RU 2414051 C1 RU2414051 C1 RU 2414051C1
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switching
subcarriers
ports
port
subcarrier
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RU2009129965A
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Russian (ru)
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Рави ПАЛАНКИ (US)
Рави ПАЛАНКИ
Аамод КХАНДЕКАР (US)
Аамод КХАНДЕКАР
Алексей ГОРОХОВ (US)
Алексей ГОРОХОВ
Нага БХУШАН (US)
Нага БХУШАН
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Квэлкомм Инкорпорейтед
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/04Wireless resource allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/713Spread spectrum techniques using frequency hopping
    • H04B1/7143Arrangements for generation of hop patterns
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/0008Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
    • 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
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/0012Hopping in multicarrier systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/692Hybrid techniques using combinations of two or more spread spectrum techniques
    • 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
    • H04L5/0014Three-dimensional division
    • H04L5/0023Time-frequency-space
    • 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
    • H04L5/0037Inter-user or inter-terminal allocation
    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
RU2009129965A 2007-01-05 2008-01-04 Распределение и отображение ресурсов в системе беспроводной связи RU2414051C1 (ru)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US88375807P 2007-01-05 2007-01-05
US88372907P 2007-01-05 2007-01-05
US60/883,729 2007-01-05
US60/883,758 2007-01-05
US11/969,200 2008-01-03

Publications (1)

Publication Number Publication Date
RU2414051C1 true RU2414051C1 (ru) 2011-03-10

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RU2009129965A RU2414051C1 (ru) 2007-01-05 2008-01-04 Распределение и отображение ресурсов в системе беспроводной связи

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Country Link
US (1) US8305999B2 (enExample)
EP (1) EP2100383A2 (enExample)
JP (2) JP5248522B2 (enExample)
CN (1) CN101578772B (enExample)
BR (1) BRPI0806293B1 (enExample)
CA (1) CA2674616C (enExample)
IN (1) IN2009CN03483A (enExample)
RU (1) RU2414051C1 (enExample)
TW (1) TWI470977B (enExample)
WO (1) WO2008086163A2 (enExample)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013112214A3 (en) * 2011-10-18 2013-10-03 California Institute Of Technology Efficient active multi-drive radiator
US9485076B2 (en) 2012-02-17 2016-11-01 California Institute Of Technology Dynamic polarization modulation and control
US9621269B2 (en) 2012-07-26 2017-04-11 California Institute Of Technology Optically driven active radiator
US9921255B2 (en) 2012-02-13 2018-03-20 California Institute Of Technology Sensing radiation metrics through mode-pickup sensors
RU2648610C2 (ru) * 2014-01-10 2018-03-26 Хуавей Текнолоджиз Ко., Лтд. Система и способ зонирования в программно определяемых сетях
RU2731872C1 (ru) * 2016-08-12 2020-09-08 Панасоник Интеллекчуал Проперти Корпорэйшн оф Америка Динамическое выделение ресурсов между различными схемами ofdm-нумерологии
RU2781273C2 (ru) * 2018-02-15 2022-10-11 Хуавей Текнолоджиз Ко., Лтд. Системы связи ofdm со способом определения смещения поднесущей для формирования символов ofdm
US11936508B2 (en) 2018-02-15 2024-03-19 Huawei Technologies Co., Ltd. OFDM communications system with method for determination of subcarrier offset for OFDM symbol generation

Families Citing this family (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8305999B2 (en) * 2007-01-05 2012-11-06 Ravi Palanki Resource allocation and mapping in a wireless communication system
GB2446197A (en) 2007-02-05 2008-08-06 Nec Corp Frequency-hopping method and mobile communication system
US20080240032A1 (en) * 2007-03-27 2008-10-02 Clearwire Corporation System and method for condensed frequency reuse in a wireless communication system
US7995529B2 (en) * 2007-03-27 2011-08-09 Clear Wireless Llc System and method for cell planning in a wireless communication network
TWI502933B (zh) * 2007-05-02 2015-10-01 Koninkl Philips Electronics Nv 於正交分頻多工網路中的通信方法
US8169992B2 (en) 2007-08-08 2012-05-01 Telefonaktiebolaget Lm Ericsson (Publ) Uplink scrambling during random access
KR101492566B1 (ko) * 2008-03-26 2015-02-12 삼성전자주식회사 광대역 무선통신 시스템에서 복합 자동 재전송 요청을지원하기 위한 장치 및 방법
KR101700184B1 (ko) * 2008-07-01 2017-02-13 엘지전자 주식회사 무선 통신을 위한 향상된 자원 입도를 갖는 퍼뮤테이션 장치 및 방법
KR20100008150A (ko) * 2008-07-15 2010-01-25 삼성전자주식회사 광대역 무선통신 시스템에서 복합 자동 재전송 요청 재결합이득을 향상시키기 위한 장치 및 방법
CN101635595B (zh) * 2008-07-24 2013-12-04 中兴通讯股份有限公司 无线资源的子信道化和资源映射方法
US8295373B2 (en) * 2008-09-30 2012-10-23 Intel Corporation Virtual multicarrier design for orthogonal frequency division multiple access communications
CN101730237B (zh) * 2008-10-28 2012-06-06 中兴通讯股份有限公司 无线资源映射方法
CN102308653B (zh) 2008-12-08 2015-03-11 诺基亚通信公司 蜂窝电信系统中的上行链路控制信令
CN104683083B (zh) * 2008-12-08 2018-07-20 无线未来科技公司 用于蜂窝电信系统中的方法及设备
US20100172318A1 (en) * 2009-01-05 2010-07-08 Intel Corporation Handling Hybrid Automatic Repeat Requests in Wireless Systems
KR101608784B1 (ko) * 2009-01-21 2016-04-20 엘지전자 주식회사 무선 통신 시스템에서의 멀티캐스트 및/또는 브로드캐스트 서비스 데이터를 위한 자원 할당 방법 및 이를 위한 장치
US8472304B2 (en) * 2009-03-31 2013-06-25 Mitsubishi Electric Research Laboratories, Inc. Carrier allocation and time sharing for OFDMA/TDMA networks
CN102244631B (zh) * 2010-05-11 2014-12-17 华为技术有限公司 一种中心子载波的配置方法和设备
US9740762B2 (en) 2011-04-01 2017-08-22 Mongodb, Inc. System and method for optimizing data migration in a partitioned database
US11544288B2 (en) 2010-12-23 2023-01-03 Mongodb, Inc. Systems and methods for managing distributed database deployments
US9805108B2 (en) 2010-12-23 2017-10-31 Mongodb, Inc. Large distributed database clustering systems and methods
US10977277B2 (en) 2010-12-23 2021-04-13 Mongodb, Inc. Systems and methods for database zone sharding and API integration
US10997211B2 (en) * 2010-12-23 2021-05-04 Mongodb, Inc. Systems and methods for database zone sharding and API integration
US10262050B2 (en) 2015-09-25 2019-04-16 Mongodb, Inc. Distributed database systems and methods with pluggable storage engines
US11615115B2 (en) 2010-12-23 2023-03-28 Mongodb, Inc. Systems and methods for managing distributed database deployments
US10346430B2 (en) 2010-12-23 2019-07-09 Mongodb, Inc. System and method for determining consensus within a distributed database
US10713280B2 (en) 2010-12-23 2020-07-14 Mongodb, Inc. Systems and methods for managing distributed database deployments
US10698775B2 (en) 2016-05-31 2020-06-30 Mongodb, Inc. Method and apparatus for reading and writing committed data
US10740353B2 (en) 2010-12-23 2020-08-11 Mongodb, Inc. Systems and methods for managing distributed database deployments
US8996463B2 (en) 2012-07-26 2015-03-31 Mongodb, Inc. Aggregation framework system architecture and method
US11544284B2 (en) 2012-07-26 2023-01-03 Mongodb, Inc. Aggregation framework system architecture and method
US10872095B2 (en) 2012-07-26 2020-12-22 Mongodb, Inc. Aggregation framework system architecture and method
US11403317B2 (en) 2012-07-26 2022-08-02 Mongodb, Inc. Aggregation framework system architecture and method
CN104378829B (zh) * 2013-08-15 2019-01-11 上海诺基亚贝尔股份有限公司 一种基于业务类型实施信道分配和调度的方法及其设备
JP5738377B2 (ja) * 2013-10-04 2015-06-24 ワイアレス フューチャー テクノロジーズ インコーポレイテッド セルラー電話通信システムにおけるアップリンク制御シグナリング
JP2015156711A (ja) * 2015-04-21 2015-08-27 ワイアレス フューチャー テクノロジーズ インコーポレイテッド セルラー電話通信システムにおけるアップリンク制御シグナリング
US10496669B2 (en) 2015-07-02 2019-12-03 Mongodb, Inc. System and method for augmenting consensus election in a distributed database
CN107836129B (zh) * 2015-07-06 2020-04-14 华为技术有限公司 一种数据传输的方法、无线网络设备和通信系统
US10673623B2 (en) 2015-09-25 2020-06-02 Mongodb, Inc. Systems and methods for hierarchical key management in encrypted distributed databases
US10846411B2 (en) 2015-09-25 2020-11-24 Mongodb, Inc. Distributed database systems and methods with encrypted storage engines
US10135596B2 (en) * 2016-01-20 2018-11-20 Qualcomm Incorporated Narrow band ACK / NACK transmissions
US10621050B2 (en) 2016-06-27 2020-04-14 Mongodb, Inc. Method and apparatus for restoring data from snapshots
CN109041092B (zh) * 2017-06-12 2021-04-09 华为技术有限公司 网络资源分配方法及网络控制器
US10866868B2 (en) 2017-06-20 2020-12-15 Mongodb, Inc. Systems and methods for optimization of database operations
CN108880716A (zh) * 2018-07-05 2018-11-23 中国电子科技集团公司第五十四研究所 一种基于数字信道化技术的卫星信道模拟器设计方法
CN113348629B (zh) * 2018-12-29 2023-07-07 华为技术有限公司 通信方法和装置
CN113424486B (zh) * 2019-04-01 2022-12-30 华为技术有限公司 一种多跳网络的跳频方法及装置
US11563507B2 (en) * 2019-05-14 2023-01-24 Infinera Corporation Efficient adaptive optical spectrum partitioning and allocation scheme
CN110808822B (zh) * 2019-10-09 2021-05-04 西北大学 一种数字随机多频点跳频跳时信息传输方法及系统

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2181229C1 (ru) * 2001-10-04 2002-04-10 Оао "Персональные Коммуникации" Способ динамического перераспределения загрузки базовых станций сотовой сети связи и устройство для его осуществления (варианты)
WO2006069301A2 (en) * 2004-12-22 2006-06-29 Qualcomm Incorporated Methods and apparatus for flexible hopping in a multiple-access communication network

Family Cites Families (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5841813A (en) * 1996-09-04 1998-11-24 Lucent Technologies Inc. Digital communications system using complementary codes and amplitude modulation
EP0992129A1 (de) * 1997-06-24 2000-04-12 Siemens Aktiengesellschaft Verfahren und vorrichtung zur funk-übertragung
FR2767007B1 (fr) * 1997-08-01 1999-11-05 France Telecom Procede d'acces multiple dans un reseau cellulaire de radiocommunication
US7280580B1 (en) * 1999-10-15 2007-10-09 Telefonaktlebolaget Lm Ericsson (Publ.) Hop sequence adaptation in a frequency-hopping communications system
DE50104407D1 (de) * 2000-06-14 2004-12-09 Rohde & Schwarz System zur datenübertragung nach dem frequenzsprungverfahren
US7532610B2 (en) * 2001-01-16 2009-05-12 Texas Instruments Incorporated Structured adaptive frequency hopping
US7248559B2 (en) * 2001-10-17 2007-07-24 Nortel Networks Limited Scattered pilot pattern and channel estimation method for MIMO-OFDM systems
US6934901B2 (en) * 2001-12-04 2005-08-23 Intel Corporation Block interleaver method and system
US7054301B1 (en) * 2001-12-31 2006-05-30 Arraycomm, Llc. Coordinated hopping in wireless networks using adaptive antenna arrays
US20030147453A1 (en) * 2002-02-06 2003-08-07 Texas Instruments Incorporated Adaptive frequency hopping communication scheme
WO2004038972A1 (en) * 2002-10-26 2004-05-06 Electronics And Telecommunications Research Institute Frequency hopping ofdma method using symbols of comb pattern
WO2004077777A1 (en) * 2003-02-28 2004-09-10 Nortel Networks Limited Sub-carrier allocation for ofdm
JP3860556B2 (ja) * 2003-04-04 2006-12-20 松下電器産業株式会社 基地局装置及び通信方法
KR100606105B1 (ko) * 2003-07-04 2006-07-28 삼성전자주식회사 다중 접속 방식을 사용하는 이동 통신 시스템의 셀 탐색장치 및 방법
WO2005018185A1 (en) * 2003-08-13 2005-02-24 Philips Intellectual Property & Standards Gmbh Encryption method and decoding method for a digital transmission system
US7421005B2 (en) * 2003-10-09 2008-09-02 Telefonaktiebolaget Lm Ericsson (Publ) Frequency offset hopping for telecommunications
US7489621B2 (en) * 2003-12-30 2009-02-10 Alexander A Maltsev Adaptive puncturing technique for multicarrier systems
US8611283B2 (en) * 2004-01-28 2013-12-17 Qualcomm Incorporated Method and apparatus of using a single channel to provide acknowledgement and assignment messages
US7724777B2 (en) * 2004-06-18 2010-05-25 Qualcomm Incorporated Quasi-orthogonal multiplexing for a multi-carrier communication system
US20060067293A1 (en) * 2004-09-24 2006-03-30 John Santhoff Digital synthesis of communication signals
US8571132B2 (en) * 2004-12-22 2013-10-29 Qualcomm Incorporated Constrained hopping in wireless communication systems
US9184870B2 (en) * 2005-04-01 2015-11-10 Qualcomm Incorporated Systems and methods for control channel signaling
US7957327B2 (en) * 2005-05-18 2011-06-07 Qualcomm Incorporated Efficient support for TDD beamforming via constrained hopping and on-demand pilot
US9055552B2 (en) 2005-06-16 2015-06-09 Qualcomm Incorporated Quick paging channel with reduced probability of missed page
US7965789B2 (en) * 2005-08-22 2011-06-21 Qualcomm Incorporated Reverse link power control for an OFDMA system
GB2432752B (en) * 2005-11-29 2008-04-09 Motorola Inc Resource partitioning in a cellular communication system
US8005175B2 (en) * 2006-03-17 2011-08-23 Futurewei Technologies, Inc. Method and apparatus for interference mitigation in an OFDMA-based communication system
WO2007112547A1 (en) * 2006-03-20 2007-10-11 Nortel Networks Limited Method & system for fractional frequency reuse in a wireless communication network
US20080049692A1 (en) * 2006-08-23 2008-02-28 Motorola, Inc. Apparatus and Method For Resource Allocation and Data Transmission Using Heterogeneous Modulation Formats in a Wireless Packet Communication System
US8085711B2 (en) * 2006-08-24 2011-12-27 Futurewei Technologies, Inc. Method and system for managing radio resources for soft handoff in an OFDMA-based communication system
US20080062936A1 (en) * 2006-09-08 2008-03-13 Motorola, Inc. Method and system for processing group resource allocations
US8340070B2 (en) * 2006-10-03 2012-12-25 Qualcomm Incorporated Resource partitioning for wireless communication systems
US8305999B2 (en) * 2007-01-05 2012-11-06 Ravi Palanki Resource allocation and mapping in a wireless communication system
US8861549B2 (en) * 2007-11-05 2014-10-14 Telefonaktiebolaget Lm Ericsson (Publ) Multiple compatible OFDM systems with different bandwidths

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2181229C1 (ru) * 2001-10-04 2002-04-10 Оао "Персональные Коммуникации" Способ динамического перераспределения загрузки базовых станций сотовой сети связи и устройство для его осуществления (варианты)
WO2006069301A2 (en) * 2004-12-22 2006-06-29 Qualcomm Incorporated Methods and apparatus for flexible hopping in a multiple-access communication network

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013112214A3 (en) * 2011-10-18 2013-10-03 California Institute Of Technology Efficient active multi-drive radiator
US9225069B2 (en) 2011-10-18 2015-12-29 California Institute Of Technology Efficient active multi-drive radiator
US10290944B2 (en) 2011-10-18 2019-05-14 California Institute Of Technology Efficient active multi-drive radiator
US9921255B2 (en) 2012-02-13 2018-03-20 California Institute Of Technology Sensing radiation metrics through mode-pickup sensors
US9485076B2 (en) 2012-02-17 2016-11-01 California Institute Of Technology Dynamic polarization modulation and control
US9686070B2 (en) 2012-02-17 2017-06-20 California Institute Of Technology Dynamic polarization modulation and control
US9621269B2 (en) 2012-07-26 2017-04-11 California Institute Of Technology Optically driven active radiator
RU2648610C2 (ru) * 2014-01-10 2018-03-26 Хуавей Текнолоджиз Ко., Лтд. Система и способ зонирования в программно определяемых сетях
RU2731872C1 (ru) * 2016-08-12 2020-09-08 Панасоник Интеллекчуал Проперти Корпорэйшн оф Америка Динамическое выделение ресурсов между различными схемами ofdm-нумерологии
RU2781273C2 (ru) * 2018-02-15 2022-10-11 Хуавей Текнолоджиз Ко., Лтд. Системы связи ofdm со способом определения смещения поднесущей для формирования символов ofdm
US11936508B2 (en) 2018-02-15 2024-03-19 Huawei Technologies Co., Ltd. OFDM communications system with method for determination of subcarrier offset for OFDM symbol generation

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Publication number Publication date
BRPI0806293B1 (pt) 2020-05-12
US8305999B2 (en) 2012-11-06
US20080165743A1 (en) 2008-07-10
IN2009CN03483A (enExample) 2015-08-07
CN101578772A (zh) 2009-11-11
JP5431538B2 (ja) 2014-03-05
JP5248522B2 (ja) 2013-07-31
JP2013009374A (ja) 2013-01-10
WO2008086163A3 (en) 2008-11-13
TWI470977B (zh) 2015-01-21
WO2008086163A2 (en) 2008-07-17
CA2674616A1 (en) 2008-07-17
BRPI0806293A2 (pt) 2011-09-06
CA2674616C (en) 2016-03-01
TW200838236A (en) 2008-09-16
EP2100383A2 (en) 2009-09-16
CN101578772B (zh) 2015-05-06
JP2010516115A (ja) 2010-05-13

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