BR0015248A - Transmissão de referência piloto sincronizada para um sistema de comunicação sem fio - Google Patents

Transmissão de referência piloto sincronizada para um sistema de comunicação sem fio

Info

Publication number
BR0015248A
BR0015248A BR0015248-0A BR0015248A BR0015248A BR 0015248 A BR0015248 A BR 0015248A BR 0015248 A BR0015248 A BR 0015248A BR 0015248 A BR0015248 A BR 0015248A
Authority
BR
Brazil
Prior art keywords
communication system
wireless communication
reference transmission
pilot reference
pilot
Prior art date
Application number
BR0015248-0A
Other languages
English (en)
Other versions
BRPI0015248B1 (pt
Inventor
Roberto Padovani
Peter J Black
Nagabhushana T Sindhushayana
Original Assignee
Qualcomm Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US09/702,142 external-priority patent/US7289473B1/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to BR122015025889A priority Critical patent/BR122015025889B1/pt
Publication of BR0015248A publication Critical patent/BR0015248A/pt
Publication of BRPI0015248B1 publication Critical patent/BRPI0015248B1/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2668—Arrangements for Wireless Code-Division Multiple Access [CDMA] System Synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70702—Intercell-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678—Time synchronisation
    • H04B7/2687—Inter base stations synchronisation
    • H04B7/2693—Centralised synchronisation, i.e. using external universal time reference, e.g. by using a global positioning system [GPS] or by distributing time reference over the wireline network
    • 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
    • H04L7/041—Speed or phase control by synchronisation signals using special codes as synchronising signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Radio Relay Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

"TRANSMISSãO DE REFERêNCIA PILOTO SINCRONIZADA PARA UM SISTEMA DE COMUNICAçãO SEM FIO". Um esquema de transmissão de referência piloto bem adequado para sistemas de comunicação sem fio de taxa alta de dados. Para maximizar a quantidade de interferência a partir de transmissões provenientes de fontes de transmissão vizinhas (por exemplo, pontos de acesso ou estações base) durante o intervalo piloto, e; portanto, minimizar a quantidade de interferência a partir de fontes de não transmissão durante os intervalos de dados, as referências piloto são transmitidas em rajadas em intervalos de tempo pré-determinados, e as rajadas piloto a partir do pontos de acesso estão sincronizadas. Isso resulta em contribuições de interferência máximas a partir de pontos de acesso vizinhos de não transmissão, facilitando a estimativa confiável do pior caso da portadora/interferência (C/I), e, além disso, permite aos dispositivos de recebimento (por exemplo, terminais de acesso) reconhecer facilmente as rajadas como referência piloto. Cada ponto de acesso transmite as rajadas piloto no ou próximo de seu nível de potência de transmissão máximo e nenhum dado específico quanto ao usuário é transmitido durante as rajadas piloto. Como um resultado, as rajadas piloto são recebidas nos terminais de acesso somente na presença de pilotos a partir de outros pontos de acesso e não são afetados por outras transmissões de dados. Isso resulta em uma relação sinal/ruído para a referência piloto, que representa a relação sinal/ruído mínima durante a transmissão de dados a partir do dado ponto de acesso, o que auxilia na estimativa rápida e confiável do pior caso da C/I.
BRPI0015248A 1999-11-03 2000-10-31 método para transmitir referências piloto a partir de uma pluralidade de fontes de transmissão, sistema de comunicação sem fio e terminal de acesso BRPI0015248B1 (pt)

Priority Applications (1)

Application Number Priority Date Filing Date Title
BR122015025889A BR122015025889B1 (pt) 1999-11-03 2000-10-31 método para transmitir referências piloto a partir de uma pluralidade de fontes de transmissão e aparelho

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16335099P 1999-11-03 1999-11-03
US09/702,142 US7289473B1 (en) 1997-11-03 2000-10-30 Pilot reference transmission for a wireless communication system
PCT/US2000/030102 WO2001033744A1 (en) 1999-11-03 2000-10-31 Synchronized pilot reference transmission for a wireless communication system

Publications (2)

Publication Number Publication Date
BR0015248A true BR0015248A (pt) 2002-11-26
BRPI0015248B1 BRPI0015248B1 (pt) 2016-01-12

Family

ID=26859573

Family Applications (2)

Application Number Title Priority Date Filing Date
BRPI0015248A BRPI0015248B1 (pt) 1999-11-03 2000-10-31 método para transmitir referências piloto a partir de uma pluralidade de fontes de transmissão, sistema de comunicação sem fio e terminal de acesso
BR122015025889A BR122015025889B1 (pt) 1999-11-03 2000-10-31 método para transmitir referências piloto a partir de uma pluralidade de fontes de transmissão e aparelho

Family Applications After (1)

Application Number Title Priority Date Filing Date
BR122015025889A BR122015025889B1 (pt) 1999-11-03 2000-10-31 método para transmitir referências piloto a partir de uma pluralidade de fontes de transmissão e aparelho

Country Status (11)

Country Link
EP (2) EP1835638B1 (pt)
JP (1) JP4607407B2 (pt)
KR (1) KR100726743B1 (pt)
CN (1) CN100481753C (pt)
AT (2) ATE446623T1 (pt)
AU (1) AU1914601A (pt)
BR (2) BRPI0015248B1 (pt)
DE (2) DE60043203D1 (pt)
ES (2) ES2290060T3 (pt)
HK (2) HK1052593B (pt)
WO (1) WO2001033744A1 (pt)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATE446623T1 (de) 1999-11-03 2009-11-15 Qualcomm Inc Synchronisierte pilotreferenzübertragung für ein drahtloses kommunikationssystem
KR101069304B1 (ko) 2001-05-14 2011-10-05 인터디지탈 테크날러지 코포레이션 다운링크 자원 할당을 위한 채널 품질 측정값 제공 방법, 무선 디지털 통신 시스템 및 사용자 장치
AU2006252118B8 (en) * 2001-05-14 2010-03-04 Interdigital Technology Corporation Channel quality measurements for downlink resource allocation
US6795489B2 (en) 2001-08-09 2004-09-21 Qualcomm Inc. Acquisition of a gated pilot
ATE398365T1 (de) 2004-02-05 2008-07-15 Koninkl Philips Electronics Nv Verfahren und vorrichtung zum synchronisieren über 802.3af
US7372831B2 (en) 2004-08-11 2008-05-13 Lg Electronics Inc. Packet transmission acknowledgement in wireless communication system
WO2006119453A1 (en) 2005-05-04 2006-11-09 Mediacell Licensing Corp Self synchronized beacon
US8259852B2 (en) * 2006-07-19 2012-09-04 Broadcom Corporation Method and system for satellite communication
NZ547713A (en) * 2006-06-07 2008-06-30 Tait Electronics Ltd Transmission constellation density varied in accordance with time between bursts
US9603062B2 (en) * 2007-11-16 2017-03-21 Qualcomm Incorporated Classifying access points using pilot identifiers
US8848656B2 (en) 2007-11-16 2014-09-30 Qualcomm Incorporated Utilizing broadcast signals to convey restricted association information
US8902867B2 (en) 2007-11-16 2014-12-02 Qualcomm Incorporated Favoring access points in wireless communications
CN101741420B (zh) 2008-11-12 2013-08-07 华为技术有限公司 信道估计方法、装置及***
WO2010133028A1 (zh) * 2009-05-21 2010-11-25 华为技术有限公司 一种功率控制方法、装置和基站
US8817936B2 (en) * 2012-05-23 2014-08-26 The Boeing Company Multiple synchronous IQ demodulators

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US575073A (en) 1897-01-12 Fence-post
US5614914A (en) * 1994-09-06 1997-03-25 Interdigital Technology Corporation Wireless telephone distribution system with time and space diversity transmission for determining receiver location
KR0142497B1 (ko) 1995-06-23 1998-08-01 양승택 역방향 링크에 버스트 파일럿을 갖는 채널구조
JPH1098763A (ja) * 1996-09-20 1998-04-14 Oki Electric Ind Co Ltd パイロット信号の基地局間同期方法及び回路
SE518224C2 (sv) * 1997-06-24 2002-09-10 Ericsson Telefon Ab L M Sätt och system i ett cellbaserat nät
DE19757367C2 (de) * 1997-12-22 2003-03-13 Siemens Ag Anordnung zum Synchronisieren von Funkbasisstationen
ATE446623T1 (de) 1999-11-03 2009-11-15 Qualcomm Inc Synchronisierte pilotreferenzübertragung für ein drahtloses kommunikationssystem

Also Published As

Publication number Publication date
EP1835638A1 (en) 2007-09-19
DE60035891D1 (de) 2007-09-20
CN100481753C (zh) 2009-04-22
EP1226665A1 (en) 2002-07-31
DE60035891T2 (de) 2008-04-24
HK1052593A1 (en) 2003-09-19
EP1835638B1 (en) 2009-10-21
DE60043203D1 (de) 2009-12-03
ES2332947T3 (es) 2010-02-15
HK1114473A1 (en) 2008-10-31
JP4607407B2 (ja) 2011-01-05
ATE446623T1 (de) 2009-11-15
ATE369669T1 (de) 2007-08-15
BRPI0015248B1 (pt) 2016-01-12
WO2001033744A1 (en) 2001-05-10
KR20020044589A (ko) 2002-06-15
KR100726743B1 (ko) 2007-06-11
BR122015025889B1 (pt) 2016-12-27
AU1914601A (en) 2001-05-14
EP1226665B1 (en) 2007-08-08
CN1415143A (zh) 2003-04-30
ES2290060T3 (es) 2008-02-16
HK1052593B (zh) 2010-02-12
JP2003529971A (ja) 2003-10-07

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Legal Events

Date Code Title Description
B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B15K Others concerning applications: alteration of classification

Free format text: AS CLASSIFICACOES ANTERIORES ERAM: H04B 7/26 , H04J 13/02

Ipc: H04L 7/04 (2006.01), H04B 7/26 (2006.01), H04J 13/

B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 12/01/2016, OBSERVADAS AS CONDICOES LEGAIS.