WO2005002111A3 - Diversity control in wireless communications devices and methods - Google Patents

Diversity control in wireless communications devices and methods Download PDF

Info

Publication number
WO2005002111A3
WO2005002111A3 PCT/US2004/014058 US2004014058W WO2005002111A3 WO 2005002111 A3 WO2005002111 A3 WO 2005002111A3 US 2004014058 W US2004014058 W US 2004014058W WO 2005002111 A3 WO2005002111 A3 WO 2005002111A3
Authority
WO
WIPO (PCT)
Prior art keywords
wireless communications
methods
communications devices
diversity control
diversity
Prior art date
Application number
PCT/US2004/014058
Other languages
French (fr)
Other versions
WO2005002111A2 (en
Inventor
Robert T Love
Kenneth A Stewart
Original Assignee
Motorola Inc
Robert T Love
Kenneth A Stewart
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
Application filed by Motorola Inc, Robert T Love, Kenneth A Stewart filed Critical Motorola Inc
Priority to EP04751450.0A priority Critical patent/EP1632096B1/en
Priority to CN2004800144638A priority patent/CN1795687B/en
Priority to KR1020057023608A priority patent/KR101164686B1/en
Priority to JP2006532805A priority patent/JP4820951B2/en
Priority to BRPI0411307-1A priority patent/BRPI0411307B1/en
Publication of WO2005002111A2 publication Critical patent/WO2005002111A2/en
Publication of WO2005002111A3 publication Critical patent/WO2005002111A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/42—TPC being performed in particular situations in systems with time, space, frequency or polarisation diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
    • H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0825—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with main and with auxiliary or diversity antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0874—Hybrid systems, i.e. switching and combining using subgroups of receive antennas
    • H04B7/0877—Hybrid systems, i.e. switching and combining using subgroups of receive antennas switching off a diversity branch, e.g. to save power
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

A wireless communications device (100) includes a primary radio frequency branch (134) and a diversity branch (136), which is enabled and disabled to balance performance and power consumption. Diversity mode operation of the device is controlled, for example, based on one or more of an estimated channel quality indicator, data reception, data rate, state or mode of the station, estimated signal to noise ratio of a pilot signal, battery power level, distance from a serving cell, among other factors.
PCT/US2004/014058 2003-06-10 2004-05-05 Diversity control in wireless communications devices and methods WO2005002111A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP04751450.0A EP1632096B1 (en) 2003-06-10 2004-05-05 Diversity control in wireless communications devices and methods
CN2004800144638A CN1795687B (en) 2003-06-10 2004-05-05 Diversity control in wireless communications devices and methods
KR1020057023608A KR101164686B1 (en) 2003-06-10 2004-05-05 Diversity control in wireless communications devices and methods
JP2006532805A JP4820951B2 (en) 2003-06-10 2004-05-05 Diversity control in wireless communication devices and methods
BRPI0411307-1A BRPI0411307B1 (en) 2003-06-10 2004-05-05 METHOD FOR DETERMINING A CHANNEL QUALITY INDICATOR

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US10/458,701 2003-06-10
US10/458,701 US7929921B2 (en) 2003-06-10 2003-06-10 Diversity control in wireless communications devices and methods

Publications (2)

Publication Number Publication Date
WO2005002111A2 WO2005002111A2 (en) 2005-01-06
WO2005002111A3 true WO2005002111A3 (en) 2005-06-16

Family

ID=33510637

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2004/014058 WO2005002111A2 (en) 2003-06-10 2004-05-05 Diversity control in wireless communications devices and methods

Country Status (7)

Country Link
US (1) US7929921B2 (en)
EP (1) EP1632096B1 (en)
JP (1) JP4820951B2 (en)
KR (1) KR101164686B1 (en)
CN (1) CN1795687B (en)
BR (1) BRPI0411307B1 (en)
WO (1) WO2005002111A2 (en)

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