EP0516651A1 - Procede et systeme destines a etablir des liaisons a l'aide d'un telephone sans fil - Google Patents

Procede et systeme destines a etablir des liaisons a l'aide d'un telephone sans fil

Info

Publication number
EP0516651A1
EP0516651A1 EP91903472A EP91903472A EP0516651A1 EP 0516651 A1 EP0516651 A1 EP 0516651A1 EP 91903472 A EP91903472 A EP 91903472A EP 91903472 A EP91903472 A EP 91903472A EP 0516651 A1 EP0516651 A1 EP 0516651A1
Authority
EP
European Patent Office
Prior art keywords
telephone
call
information
base station
available
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.)
Withdrawn
Application number
EP91903472A
Other languages
German (de)
English (en)
Other versions
EP0516651A4 (en
Inventor
Prabhakar Muppidi
Gary Steven Lobel
Steven Curtis Shapiro
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.)
Motorola Solutions Inc
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of EP0516651A1 publication Critical patent/EP0516651A1/fr
Publication of EP0516651A4 publication Critical patent/EP0516651A4/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M1/00—Substation equipment, e.g. for use by subscribers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W68/00—User notification, e.g. alerting and paging, for incoming communication, change of service or the like
    • H04W68/12—Inter-network notification
    • 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]
    • H04W84/022—One-way selective calling networks, e.g. wide area paging

Definitions

  • This invention relates to radio communication systems in general and particularly to a system for interconnecting telephone calls to portable radio devices.
  • the second generation cordless telephone system or CT-2 system that has been proposed envisions utilization of a plurality of RF channels for radio communication.
  • the proposed system would include forty channels for providing the RF links between the cordless telephones or CT-2 handsets and the base system which is connected to the existing telephone network.
  • the cordless telephone unit can be used to originate telephone calls when the user is within range of a a telepoint or callpoint.
  • the cordless telephone would scan the 40 channels to find an available channel and then attempt to access the telepoint.
  • the telepoint likewise, would be scanning the forty available channels for incoming radio calls and when it received a call request from a cordless telephone would provide the telephone interconnection.
  • a system provides for the placement of calls from the cordless telephone while away from home base.
  • it is not readily adaptable to the reception of phone calls.
  • This radio communication system includes a plurality of remote base stations or callpoints.
  • the identifying information for the cordless telephone along with a call back number or ID is transmitted as by a paging signal.
  • Each of the base stations can include a paging receiver for receiving the information . If the base station has a line available it would then initiating a call to the cordless telephone. A base station locating the cordless telephone would provide the connection for the call..
  • Fig. 1 is a block diagram of a radio communication system in accordance to the present invention.
  • Fig. 2 is a flow chart of the operation of the wireless PABX of Fig. 1.
  • Fig. 3 is a flow chart of the operation of a base station of
  • the radio communication system 10 is designed to interface cordless telephones to the Public Switched Telephone Network (PSTN). While the preferred embodiment is illustrated in the context of a CT-2 system, other similar systems could be utilized.
  • a plurality of portable radio telephone devices such as CT-2 handsets 11 can interface with the PSTN via any one of a plurality of CT-2 base stations 12.
  • Each CT-2 handset 11 is designed as a low power transceiver which, when at its home base, is designed for receiving and originating telephone calls. When away from its home base, the handset 11 can originate calls if it is within range of a CT-2 base station 12.
  • the present invention provides means for attempting to locate a CT-2 handset 11 when it is at a location other than its home base station.
  • each CT-2 handset would have two address codes, or phone numbers corresponding to home location and one for use when it is away from its home location.
  • a telephone number corresponding to the remote ID would be dialed to connect the phone user to the wireless PABX 14, which can be a CT-2 switch or a central telephone office.
  • Such a wireless PABX can be coupled to a network controller center 16 via a data link 18 for purposes of system billing, handset ID, and the like.
  • the wireless PABX 14 When a call is received at the wireless PABX 14 for a particular CT-2 handset 11 , the wireless PABX would originate a paging message, which would include an ID for the called CT-2 handset as well as connection information for connecting the CT-2 handset with the incoming phone call at the PABX. This information would be transmitted, as via a wide area paging transmitter 20.
  • Each of the CT-2 base stations 12 include a paging receiver for receiving the page transmissions.
  • the CT-2 base stations are also connected to the wireless PABX as by phone lines or trunks 22.
  • Each CT-2 base station 12 can include a plurality of transceivers, as for example 6 for the simultaneous connection of up to 6 CT-2 handsets to 6 phone lines.
  • forty RF channels are available for use by the handsets 11 and base station 12. If a CT-2 base station 12 has an available transceiver and phone line when the page is received, the base station would choose one of the available RF channels and transmit a call with the called CT-2 handsets ID. Such calls could go on essentially simultaneously at the various CT-2 base stations 12 but would not necessarily be made on the same frequency.
  • Each of the CT-2 handsets 11 if not in use, would have a receive mode in which it would be scanning the forty RF channels for calls with its ID.
  • the call that is made over one of the six voice channels would be received by the CT-2 handset which would then automatically acknowledge a call.
  • the CT-2 base station on receipt of the acknowledgement, would respond by dialing the wireless PABX 14 using the communication phone line ID received with the page and would also ring a signal to similarly causing a ring on the CT-2 handset to alert the user to the incoming phone call.
  • the wireless PABX 14 monitors the incoming phone lines to see if a call request has been received, decision block 32. If so, the address from the PSTN trunk line is identified, block 34, and the PABX then connects to the paging transmitter 20, block 36 to transmit a numeric page which would include the handset and phone line ID information, block 38. The PABX then monitors for a response to the page, decision block 40. If no response is received, an indication such as a digitized message would be given to the caller that there has been no answer, block 42 and the routine would then end, block 44 returning to start block 30.
  • the operation of the base station 12 is illustrated in flow chart Fig. 3.
  • the routine starts at block 50 and examines whether a call request has been received as via the paging signal, decision block 52. If not, the routine continues to monitor for a call request .
  • the handset ID is extracted from the numeric data, block 54.
  • the base station determines if a transceiver/phone line is available, decision block 56. If not the routine returns to start and does not attempt to locate the called handset 11. If a voice channel is available, a call including the handset ID is transmitted an an available RF channel, block 58.
  • the channel is monitored, block 60, for a handset response. If no response is received the routine would end and return to start, decision block 62. If response is received, the base station would dial back to the PABX, block 64 utilizing the the number received in the page and the CT-2 base station would provide the RF connection between the handset and phone line, block 66 until the conversation is ended, block 68.
  • this system does not require the use of a control channel for communications between the base stations 12 and handsets 11.
  • the locating of a particular handset 11 is accomplished by utilizing one of the available CT-2 RF channels. Consequently, the handset need only be monitoring these RF channels as by scanning. If a handset is within range of a base station that is not currently fully utilized, the handset can be located and connected to an incoming phone call.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

Système de communication radio (10) comportant une pluralité de sations de base décentralisées ou points d'appel (12). Lorsqu'un appel entrant doit être dirigé vers un téléphone sans fil (11), l'information identificatrice pour le téléphone sans fil (11), ainsi qu'un numéro de rappel ou identification, est transmis par l'intermédiaire d'un signal de recherche par un PABX (14). Chacune des stations de base (12) comporte un récepteur de signaux de recherche pour recevoir l'information. Si la station de base (12) a une ligne disponible, elle amorce un appel au téléphone sans fil. Une station de base (12) qui localise le téléphone sans fil (11) fournirait la connexion pour l'appel. En appelant le PABX (14) grâce au numéro d'identification de rappel, la station de base (12) peut compléter l'appel.
EP19910903472 1990-02-22 1991-01-07 Method and system for establishing link with wireless telephone Withdrawn EP0516651A4 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US48409790A 1990-02-22 1990-02-22
US484097 1990-02-22

Publications (2)

Publication Number Publication Date
EP0516651A1 true EP0516651A1 (fr) 1992-12-09
EP0516651A4 EP0516651A4 (en) 1993-08-04

Family

ID=23922734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910903472 Withdrawn EP0516651A4 (en) 1990-02-22 1991-01-07 Method and system for establishing link with wireless telephone

Country Status (6)

Country Link
EP (1) EP0516651A4 (fr)
JP (1) JPH05503619A (fr)
KR (1) KR960004959B1 (fr)
AU (1) AU633190B2 (fr)
CA (1) CA2075279A1 (fr)
WO (1) WO1991013509A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008051211A1 (fr) 2006-10-23 2008-05-02 J.A. Woollam Co., Inc. Système et procédé pour régler et compenser des erreurs d'aoi et de poi d'un faisceau de rayonnement em

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG43212A1 (en) * 1991-12-12 1997-10-17 Nec Corp Personal mobile communications system having central station for paging mobile uers via base stations
SE500821C2 (sv) * 1992-02-17 1994-09-12 Ericsson Telefon Ab L M Sätt och anordning för att stödja kommunikation
US5361399A (en) * 1992-06-02 1994-11-01 Pagemart, Inc. Adaptive communication system for transmitting between base stations and portable transceivers via different data rate communication links
JPH06112889A (ja) * 1992-09-29 1994-04-22 Uniden Corp コードレスシステム電話装置
US5644621A (en) * 1994-01-11 1997-07-01 Matsushita Electric Industrial Co., Ltd. Point to multipoint radiotelephone system
WO1996009732A2 (fr) * 1994-09-22 1996-03-28 Philips Electronics N.V. Systeme telephonique sans fil, station de base et combine utilises dans ce systeme
US5594951A (en) * 1994-10-07 1997-01-14 Motorola, Inc. Method and apparatus for saving power in a radiotelephone
US7035914B1 (en) 1996-01-26 2006-04-25 Simpleair Holdings, Inc. System and method for transmission of data
GB2326310B (en) 1997-06-11 2002-04-17 Dsc Telecom Lp Establishing a wireless link between a central terminal and a subscriber terminal of a wireless telecommunications system

Family Cites Families (6)

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Publication number Priority date Publication date Assignee Title
NL7607300A (nl) * 1976-07-02 1978-01-04 Philips Nv Automatisch radio-telefoniesysteem.
JPS5919503B2 (ja) * 1978-02-24 1984-05-07 日本電信電話株式会社 追跡電話方式
GB8419003D0 (en) * 1984-07-25 1984-08-30 Racal Res Ltd Portable telephones
JPS61171299A (ja) * 1985-01-25 1986-08-01 Shingo Kato 呼出接続交換機
GB2179823A (en) * 1985-08-28 1987-03-11 Philips Electronic Associated Communications system
JP2580129B2 (ja) * 1986-07-18 1997-02-12 ソニー株式会社 送受信装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9113509A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008051211A1 (fr) 2006-10-23 2008-05-02 J.A. Woollam Co., Inc. Système et procédé pour régler et compenser des erreurs d'aoi et de poi d'un faisceau de rayonnement em

Also Published As

Publication number Publication date
EP0516651A4 (en) 1993-08-04
KR920704486A (ko) 1992-12-19
AU7225991A (en) 1991-09-18
WO1991013509A1 (fr) 1991-09-05
JPH05503619A (ja) 1993-06-10
KR960004959B1 (ko) 1996-04-18
AU633190B2 (en) 1993-01-21
CA2075279A1 (fr) 1991-08-23

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