WO2002039762A3 - Method of and apparatus for detecting tty type calls in cellular systems - Google Patents

Method of and apparatus for detecting tty type calls in cellular systems Download PDF

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Publication number
WO2002039762A3
WO2002039762A3 PCT/US2001/044142 US0144142W WO0239762A3 WO 2002039762 A3 WO2002039762 A3 WO 2002039762A3 US 0144142 W US0144142 W US 0144142W WO 0239762 A3 WO0239762 A3 WO 0239762A3
Authority
WO
WIPO (PCT)
Prior art keywords
tty
cellular system
call
user
type user
Prior art date
Application number
PCT/US2001/044142
Other languages
French (fr)
Other versions
WO2002039762A2 (en
Inventor
Ayman Mostafa
Lundqvist Patrik
Original Assignee
Ericsson 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 Ericsson Inc filed Critical Ericsson Inc
Priority to AU2002228646A priority Critical patent/AU2002228646A1/en
Publication of WO2002039762A2 publication Critical patent/WO2002039762A2/en
Publication of WO2002039762A3 publication Critical patent/WO2002039762A3/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/16—Communication-related supplementary services, e.g. call-transfer or call-hold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42025—Calling or Called party identification service
    • H04M3/42034—Calling party identification service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/42—Systems providing special services or facilities to subscribers
    • H04M3/42391—Systems providing special services or facilities to subscribers where the subscribers are hearing-impaired persons, e.g. telephone devices for the deaf
    • 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
    • H04W88/18—Service support devices; Network management devices
    • H04W88/181—Transcoding devices; Rate adaptation devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2207/00—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place
    • H04M2207/18—Type of exchange or network, i.e. telephonic medium, in which the telephonic communication takes place wireless networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04—Large scale networks; Deep hierarchical networks
    • H04W84/042—Public Land Mobile systems, e.g. cellular systems

Abstract

A cellular system detects, at system level, whether a calling or a called party is a TTY type user, and in response to a positive identification allocates resources to service the TTY mode call. Several techniques are provided for detecting occurrence of TTY mode. According to one, either the calling or called user originates a function code identifying to the cellular system that the call, or part of the call, is in TTY mode. According to another, identifications of subscribers as TTY type user's are entered by service operators, at the time of initiation or change of service, into an HLR and/or a VLR of an MSC, to enable the cellular system to identify TTY type users. It also is contemplated that the cellular system detect specific cues indicative of a user being a TTY type user, and from such cues built and update TTY type user databases that will enable the cellular system to subsequently identify occurrence of a call by a TTY type user.
PCT/US2001/044142 2000-11-07 2001-11-05 Method of and apparatus for detecting tty type calls in cellular systems WO2002039762A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002228646A AU2002228646A1 (en) 2000-11-07 2001-11-05 Method of and apparatus for detecting tty type calls in cellular systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70786100A 2000-11-07 2000-11-07
US09/707,861 2000-11-07

Publications (2)

Publication Number Publication Date
WO2002039762A2 WO2002039762A2 (en) 2002-05-16
WO2002039762A3 true WO2002039762A3 (en) 2003-02-13

Family

ID=24843449

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/044142 WO2002039762A2 (en) 2000-11-07 2001-11-05 Method of and apparatus for detecting tty type calls in cellular systems

Country Status (2)

Country Link
AU (1) AU2002228646A1 (en)
WO (1) WO2002039762A2 (en)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5257401A (en) * 1989-04-17 1993-10-26 Telefonaktiebolaget L M Ericsson Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels
WO1994008434A1 (en) * 1992-10-02 1994-04-14 Telefonaktiebolaget Lm Ericsson Communication channel selection in cellular radio communication systems
WO1996007288A1 (en) * 1994-09-01 1996-03-07 Ericsson Inc. Improving the performance of a mobile cellular communication system
WO2000003520A1 (en) * 1998-07-13 2000-01-20 Qualcomm Incorporated Method and apparatus for establishing tdd/tty service over vocoded channels
EP1020848A2 (en) * 1999-01-11 2000-07-19 Lucent Technologies Inc. Method for transmitting auxiliary information in a vocoder stream
EP1037486A2 (en) * 1999-03-16 2000-09-20 Siemens Aktiengesellschaft Method and system for selection of a transmission channel in a communication system
WO2000078029A1 (en) * 1999-06-15 2000-12-21 Telefonaktiebolaget Lm Ericsson (Publ) Low-rate speech coder for non-speech data transmission

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5257401A (en) * 1989-04-17 1993-10-26 Telefonaktiebolaget L M Ericsson Method of maintaining an established connection in a mobile radio system comprising both analog and digital radio channels
WO1994008434A1 (en) * 1992-10-02 1994-04-14 Telefonaktiebolaget Lm Ericsson Communication channel selection in cellular radio communication systems
WO1996007288A1 (en) * 1994-09-01 1996-03-07 Ericsson Inc. Improving the performance of a mobile cellular communication system
WO2000003520A1 (en) * 1998-07-13 2000-01-20 Qualcomm Incorporated Method and apparatus for establishing tdd/tty service over vocoded channels
EP1020848A2 (en) * 1999-01-11 2000-07-19 Lucent Technologies Inc. Method for transmitting auxiliary information in a vocoder stream
EP1037486A2 (en) * 1999-03-16 2000-09-20 Siemens Aktiengesellschaft Method and system for selection of a transmission channel in a communication system
WO2000078029A1 (en) * 1999-06-15 2000-12-21 Telefonaktiebolaget Lm Ericsson (Publ) Low-rate speech coder for non-speech data transmission

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JUDITH LOCKWOOD: "Opinion: Who's Not Hearing?", WIRELESS WEEK, 16 November 1998 (1998-11-16), XP002125708 *

Also Published As

Publication number Publication date
WO2002039762A2 (en) 2002-05-16
AU2002228646A1 (en) 2002-05-21

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