WO1997044983A3 - Method and apparatus for providing diversity in hard handoff for a cdma system - Google Patents

Method and apparatus for providing diversity in hard handoff for a cdma system Download PDF

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Publication number
WO1997044983A3
WO1997044983A3 PCT/US1997/008671 US9708671W WO9744983A3 WO 1997044983 A3 WO1997044983 A3 WO 1997044983A3 US 9708671 W US9708671 W US 9708671W WO 9744983 A3 WO9744983 A3 WO 9744983A3
Authority
WO
WIPO (PCT)
Prior art keywords
base station
remote unit
communication signal
active communication
antenna
Prior art date
Application number
PCT/US1997/008671
Other languages
French (fr)
Other versions
WO1997044983A2 (en
Inventor
Edward G Tiedemann Jr
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24612837&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO1997044983(A3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to JP54270997A priority Critical patent/JP4191249B2/en
Priority to CA2256409A priority patent/CA2256409C/en
Priority to BR9712090-1A priority patent/BR9712090A/en
Priority to EP97927692A priority patent/EP0900512B1/en
Priority to AU32091/97A priority patent/AU3209197A/en
Application filed by Qualcomm Inc filed Critical Qualcomm Inc
Priority to AT97927692T priority patent/ATE302535T1/en
Priority to IL12717197A priority patent/IL127171A/en
Priority to DE69733997T priority patent/DE69733997T2/en
Publication of WO1997044983A2 publication Critical patent/WO1997044983A2/en
Publication of WO1997044983A3 publication Critical patent/WO1997044983A3/en
Priority to HK99103922A priority patent/HK1018874A1/en

Links

Classifications

    • 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
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0667—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal
    • H04B7/0671—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of delayed versions of same signal using different delays between 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
    • H04B7/022—Site diversity; Macro-diversity
    • 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
    • H04B7/2603—Arrangements for wireless physical layer control
    • H04B7/2606—Arrangements for base station coverage control, e.g. by using relays in tunnels
    • 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
    • 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
    • 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
    • H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
    • 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
    • H04W52/0203—Power saving arrangements in the radio access network or backbone network of wireless communication networks
    • 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
    • H04W52/06—TPC algorithms
    • H04W52/16—Deriving transmission power values from another channel
    • 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

In a communications network, a network user communicates using a remote unit (125) with another user (30) via at least one base station (B1A). The communications network has a first base station (B1A) having a first coverage area and a second base station (B2A) having a second coverage area. In the situation where communication is not established between the second base station (B2A) and the remote unit (125), in order to provide communication between the remote unit (125) and the first base station (B1A) when the remote unit (125) is in the first coverage and simultaneously in the second coverage area, the first base station (B1A) produces a first active communication signal as intended for the remote unit (125). The first base station transmits the first active communication signal from a first antenna (130). The base station delays the first active communication signal to produce a first delayed active communication signal and transmits it from a second antenna (135) wherein the second antenna (135) is oriented with respect to the first antenna (130) such that the first active communication signal and the first delayed active communication signal fade independently as perceived by the remote unit. The first base station (B1A) may measure a round trip delay of the first active communication signal in order to identify that the remote unit (125) is located within the second coverage area.
PCT/US1997/008671 1996-05-22 1997-05-22 Method and apparatus for providing diversity in hard handoff for a cdma system WO1997044983A2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DE69733997T DE69733997T2 (en) 1996-05-22 1997-05-22 METHOD AND DEVICE FOR DIVERSITY IN HARD DISTRIBUTION IN A CDMA SYSTEM
CA2256409A CA2256409C (en) 1996-05-22 1997-05-22 Method and apparatus for providing diversity in hard handoff for a cdma system
BR9712090-1A BR9712090A (en) 1996-05-22 1997-05-22 Method and equipment to provide diversity in hard transfer to a cdma system.
EP97927692A EP0900512B1 (en) 1996-05-22 1997-05-22 Method and apparatus for providing diversity in hard handoff for a cdma system
AU32091/97A AU3209197A (en) 1996-05-22 1997-05-22 Method and apparatus for providing diversity in hard handoff for a cdma system
JP54270997A JP4191249B2 (en) 1996-05-22 1997-05-22 Method and apparatus for providing diversity in hard handoff for CDMA systems
AT97927692T ATE302535T1 (en) 1996-05-22 1997-05-22 METHOD AND APPARATUS FOR HARD TRANSFER DIVERSITY IN A CDMA SYSTEM
IL12717197A IL127171A (en) 1996-05-22 1997-05-22 Method for providing diversity in hard handoff for cdma system
HK99103922A HK1018874A1 (en) 1996-05-22 1999-09-09 Method and apparatus for providing diversity in hard handoff for a cdma system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US651,430 1996-05-22
US08/651,430 US5926470A (en) 1996-05-22 1996-05-22 Method and apparatus for providing diversity in hard handoff for a CDMA system

Publications (2)

Publication Number Publication Date
WO1997044983A2 WO1997044983A2 (en) 1997-11-27
WO1997044983A3 true WO1997044983A3 (en) 1997-12-24

Family

ID=24612837

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/008671 WO1997044983A2 (en) 1996-05-22 1997-05-22 Method and apparatus for providing diversity in hard handoff for a cdma system

Country Status (14)

Country Link
US (1) US5926470A (en)
EP (1) EP0900512B1 (en)
JP (2) JP4191249B2 (en)
CN (1) CN1158889C (en)
AT (1) ATE302535T1 (en)
AU (1) AU3209197A (en)
BR (1) BR9712090A (en)
CA (1) CA2256409C (en)
DE (1) DE69733997T2 (en)
HK (1) HK1018874A1 (en)
IL (1) IL127171A (en)
TW (1) TW361021B (en)
WO (1) WO1997044983A2 (en)
ZA (1) ZA974384B (en)

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IL127171A0 (en) 1999-09-22

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