CA2135220A1 - Bimodal portable telephone - Google Patents

Bimodal portable telephone

Info

Publication number
CA2135220A1
CA2135220A1 CA2135220A CA2135220A CA2135220A1 CA 2135220 A1 CA2135220 A1 CA 2135220A1 CA 2135220 A CA2135220 A CA 2135220A CA 2135220 A CA2135220 A CA 2135220A CA 2135220 A1 CA2135220 A1 CA 2135220A1
Authority
CA
Canada
Prior art keywords
cordless
telephone
service
portable telephone
cellular
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA2135220A
Other languages
French (fr)
Other versions
CA2135220C (en
Inventor
Kyle Leslie Burson
Yum Cheng Chang
Wilson Fok
Andrzej Partyka
Kenneth White Leland
Denis P. Orlando
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co 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
Application filed by American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2135220A1 publication Critical patent/CA2135220A1/en
Application granted granted Critical
Publication of CA2135220C publication Critical patent/CA2135220C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A bimodal portable telephone provides cellular service and improved cordless service in a common handset. Operation of the bimodal portable telephone in a cellular telephone system provides telephone service over a wide geographical area of coverage through operation with multiple cellular bases and in a cordless telephone system provides telephone service over a localized geographical area of coverage through operation with an associated cordless base. The cordless service provides improved performance over convention cordless telephone service by advantageously employing a frequency hopping spread spectrum modulation technique for communications between the portable telephone and the cordless base unit. This improved performance achieves increased operating range of the cordless telephone system. This increased operating range is particular advantageous to the user of the portable telephone in that it permits this more economical system to be used over a much greater distance than is possible with convention cordless telephone service. Also commonality of circuitry within the portable telephone is facilitied through the selection of operating frequencies for the cordless telephone system to be in close proximity with those of the cellular telephone system.
CA002135220A 1993-12-02 1994-11-07 Bimodal portable telephone Expired - Fee Related CA2135220C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US160,135 1993-12-02
US08/160,135 US5550895A (en) 1993-12-02 1993-12-02 Bimodal portable telephone

Publications (2)

Publication Number Publication Date
CA2135220A1 true CA2135220A1 (en) 1995-06-03
CA2135220C CA2135220C (en) 1999-02-16

Family

ID=22575676

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002135220A Expired - Fee Related CA2135220C (en) 1993-12-02 1994-11-07 Bimodal portable telephone

Country Status (4)

Country Link
US (1) US5550895A (en)
EP (1) EP0656735A3 (en)
CA (1) CA2135220C (en)
SG (1) SG44359A1 (en)

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US6434184B2 (en) * 1998-12-30 2002-08-13 International Business Machines Corporation Orthogonal frequency hopping using skip zones
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Also Published As

Publication number Publication date
SG44359A1 (en) 1997-12-19
CA2135220C (en) 1999-02-16
US5550895A (en) 1996-08-27
EP0656735A3 (en) 1997-12-29
EP0656735A2 (en) 1995-06-07

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 20021107