WO1991012673A1 - Radio telephone with detachable selective call receiver - Google Patents

Radio telephone with detachable selective call receiver Download PDF

Info

Publication number
WO1991012673A1
WO1991012673A1 PCT/US1991/000061 US9100061W WO9112673A1 WO 1991012673 A1 WO1991012673 A1 WO 1991012673A1 US 9100061 W US9100061 W US 9100061W WO 9112673 A1 WO9112673 A1 WO 9112673A1
Authority
WO
WIPO (PCT)
Prior art keywords
radio telephone
selective call
call receiver
receiver
energy source
Prior art date
Application number
PCT/US1991/000061
Other languages
French (fr)
Inventor
Tuan K. Nguyen
Thomas J. Rollins
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 WO1991012673A1 publication Critical patent/WO1991012673A1/en

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/3805—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving with built-in auxiliary receivers

Definitions

  • This invention relates in general to radio telephones and more particularly to a portable radio telephone having a detachable selective call receiver.
  • Communication systems typically use a transmitter that broadcasts a signal for reception by a receiver.
  • the signal that is broadcast by the transmitter is used to convey information to a receiver that is selected by decoding an address corresponding with the targeted receiver.
  • the radio telephone user addresses other radio telephone units or land-line telephones by entering a telephone number that corresponds to the phone system address of the user to be contacted. Once the connection is complete, two way voice or data communications can take place. In the case where data reception is desired, the information must be received via a modem then presented to the user. This is typically not practical when using a portable cellular radio telephone because the modem and data terminal required results in a physical inconvenience (more equipment to carry) and added expense to the user.
  • Paging systems typically use a receiver that has at least one unique selective call address. This receiver is commonly referred to as a selective call receiver or pager. When a pager receives and decodes its address, the pager typically alerts the user to the presence of incoming information and operates to present this information. Paging systems are an excellent vehicle for delivering voice, numeric, alphanumeric or coded information to a subscriber.
  • Another object of the invention is to allow the radio telephone and selective call receiver to retain their intrinsic independent functions whether they are attached or detached.
  • a system comprising a radio telephone and a selective call receiver where the selective call receiver is capable of being removably detached from the radio telephone.
  • FIG. 1 is a system diagram of the radio telephone/selective call receiver system in accordance with the preferred embodiment.
  • FIG. 2A is a block diagram of the radio telephone.
  • FIG. 2B is a block diagram of the selective call receiver.
  • FIG. 3 is an front isometric view of the radio telephone/selective call receiver unit.
  • FIG. 4A is an front isometric view of the articulated portion of the radio telephone/selective call receiver unit showing the selective call receiver attached.
  • FIG. 4B is an front isometric view of the articulated portion of the radio telephone/selective call receiver unit showing the selective call receiver detached.
  • the preferred embodiment of the radio telephone/selective call receiver system comprises a telephone 101 connected by the standard telephone network to a system controller 102 which oversees the operation of the radio frequency transmitter/receiver 103 and encodes and decodes the inbound and outbound addresses into formats that are compatible the the respective land line and cellular radio telephone addressing requirements.
  • the system controller 102 can also function to encode paging messages for transmission by the radio frequency transmitter/receiver 103. Telephony signals are transmitted to and received from a radio telephone 105 by at least one antenna 104 coupled to the radio frequency transmitter/receiver 103.
  • the radio frequency transmitter/receiver 103 may also be used to transmit paging messages to the selective call receiver 106.
  • the system controller 102 is capable of operating in a distributed transmission control environment that allows mixing cellular, simulcast, master/slave, or any conventional wide and local area coverage scheme.
  • FIG. 2A a block diagram is shown of the battery 201 powered radio telephone.
  • a radio frequency signal is received or transmitted by the antenna 202.
  • the antenna is coupled to the receiver 203 and transmitter 204 by a diplexer 205.
  • the received signal is routed from the receiver 203 to the control circuitry 206 that recovers any information contained within the received signal. This recovered information is then used to activate the alert 207 (a ringer in the case of a cellular radio telephone) and after answering the call, sustain the connection.
  • the alert 207 a ringer in the case of a cellular radio telephone
  • the user aurally communicates with the other party via the speaker 208 and a microphone 209.
  • Recovered audio from the control circuitry 206 is routed to the speaker which converts electrical energy into acoustical energy thus enabling the user to hear any communications.
  • the microphone 209 is used to convert acoustic energy into electrical energy for use by the control circuitry 206 in modulating the radio frequency carrier produced by the transmitter 204.
  • the user may initiate a call by selecting the proper control 210 and dialing the ntimber of the party to be contacted. When dialed, the number is presented on a display 211 to provide visual feedback for the user.
  • the selective call receiver operates to receive a signal via an antenna 213.
  • the received signal is routed from the antenna 213 to the receiver 214.
  • the receiver 214 demodulates the received signals using conventional techniques and forwards the demodulated signal to the control circuitry 215, which decodes and recovers information contained within the received signal.
  • the selective call receiver presents at least a portion of the information, such as by a display 217, and signals the user via a sensible alert 218 that a message has been received.
  • the front isometric view of the radio telephone/selective call receiver shows the antenna, radio telephone portion 302, loudspeaker 303, display 304, control pad 305 including a dialing keypad and associated operational controls, a microphone 306, and a removably detachable selective call receiver 307.
  • Electrical contacts located on the back of the radio telephone portion 302 of the unit are provided for charging the individual power sources contained within the radio telephone and the selective call receiver. Charging is accomplished by folding the lower articulated portion including the selective call receiver upward against the control pad 305 then inserting the folded unit into a charging apparatus (not shown) .
  • a portable power pack can be coupled into a power jack located on the radio telephone portion 302 of the unit for charging.
  • the front isometric view of the articulated portion of the radio telephone/selective call receiver unit shows the attachment means 401 on which the articulated portion pivots when the complete unit is assembled.
  • the top section 402 of the articulated portion of the radio telephone/selective call receiver unit contains the microphone 403 that is used by the radio telephone.
  • the bottom section 404 comprises a selective call receiver with integral display means 405, function controls 406, and an alert transducer (not shown) .
  • the front isometric view of the articulated portion of the radio telephone/selective call receiver unit shows the selective call receiver 407 detached from the top section 402 of the articulated portion of the radio telephone/selective call receiver unit 408.
  • Mechanical contacts 409 that reside within the retaining slot for the selective call receiver, provide a connection means for coupling electrical power from the radio telephone to contacts (not shown) located on the top of the selective call receiver. This power is used to replenish charge in the selective call receiver's power source.
  • a flap 410 is provided to protect the electrical contacts 409 as well as the rails that form the retaining slot. This flap 410 folds flat and locks against the retaining area.
  • the selective call receiver 407 and radio telephone are fully functional as their own independent entities.
  • This feature offers the user additional utility in that they may on occasion choose to carry only the radio telephone or selective call receiver 407.
  • An example of this would be an executive that carries the complete unit in their briefcase would want to be in touch with his office during lunch. The executive would then detach the selective call receiver 407 from the radio telephone, store the radio telephone in their locked briefcase, and carry the selective call receiver 407 to lunch. Because the selective call receiver 407 is much less bulkier than the entire unit and offers a silent alerting (vibratory alert) message storage capability (this feature eliminates audible interruptions and allows the user to defer answering the message) , the user is offered an increased level of convenience.

Abstract

A system comprising a radio telephone (105) and a selective call receiver (106) where the selective call receiver (106) is capable of being removably detached from the radio telephone (407), providing an improved radio communications system that gives the user the convenience of a radio telephone (105) and the utility of a selective call receiver (106) in a modular assembly.

Description

RADIO TELEPHONE WITH DETACHABLE SELECTIVE CALL RECEIVER
Field of the Invention
This invention relates in general to radio telephones and more particularly to a portable radio telephone having a detachable selective call receiver.
Background of the Invention
Communication systems typically use a transmitter that broadcasts a signal for reception by a receiver. The signal that is broadcast by the transmitter is used to convey information to a receiver that is selected by decoding an address corresponding with the targeted receiver. In a radio telephone system, the radio telephone user addresses other radio telephone units or land-line telephones by entering a telephone number that corresponds to the phone system address of the user to be contacted. Once the connection is complete, two way voice or data communications can take place. In the case where data reception is desired, the information must be received via a modem then presented to the user. This is typically not practical when using a portable cellular radio telephone because the modem and data terminal required results in a physical inconvenience (more equipment to carry) and added expense to the user. In existing cellular radio telephone systems, the high cost of initiating or receiving a call at the cellular unit has prevented many potential users from subscribing to cellular services. If a call screening function could be implemented in the system at a minimal cost to the cellular subscriber, this would create a greater potential market for cellular services as a whole.
Paging systems typically use a receiver that has at least one unique selective call address. This receiver is commonly referred to as a selective call receiver or pager. When a pager receives and decodes its address, the pager typically alerts the user to the presence of incoming information and operates to present this information. Paging systems are an excellent vehicle for delivering voice, numeric, alphanumeric or coded information to a subscriber.
The existing infrastructure used by cellular service operators cannot directly accommodate standard selective call paging. Presently, cellular carriers are hesitant to support changes in their system's operation, signalling protocol, or frequency allocations to support a lower revenue service (paging) in their network. This position relegates the consumer to a decision of paying for an unnecessarily expensive system (cellular radio telephone) or compromising their communication requirements by giving up two way communication capability with the choice of paging. The subscription cost to a paging service is significantly lower that of a cellular radio telephone service. The present solution to this problem is to separately purchase both a cellular radio telephone and a pager, and to subscribe to each of their respective services. This requires the user to carry both units if they want the communications capability provided by each. In the case where a cellular radio telephone subscriber has a mobile unit (rigidly mounted in a vehicle) , the subscriber loses half of their communications capability when leaving their vehicle.
Thus, what is needed is an apparatus that combines a radio telephone and a selective call receiver in a convenient fashion.
Summary of the Invention
Accordingly, it is an object of the present invention to provide an improved communications system that gives the user the convenience of a radio telephone and the utility of a selective call receiver in a modular assembly.
Another object of the invention is to allow the radio telephone and selective call receiver to retain their intrinsic independent functions whether they are attached or detached.
In carrying out the above and other objects of the invention in one form, there is provided a system comprising a radio telephone and a selective call receiver where the selective call receiver is capable of being removably detached from the radio telephone.
Brief Description of the Drawings
FIG. 1 is a system diagram of the radio telephone/selective call receiver system in accordance with the preferred embodiment. FIG. 2A is a block diagram of the radio telephone. FIG. 2B is a block diagram of the selective call receiver.
FIG. 3 is an front isometric view of the radio telephone/selective call receiver unit. FIG. 4A is an front isometric view of the articulated portion of the radio telephone/selective call receiver unit showing the selective call receiver attached.
FIG. 4B is an front isometric view of the articulated portion of the radio telephone/selective call receiver unit showing the selective call receiver detached.
Description of a Preferred Embodiment
Referring to FIG. 1, the preferred embodiment of the radio telephone/selective call receiver system comprises a telephone 101 connected by the standard telephone network to a system controller 102 which oversees the operation of the radio frequency transmitter/receiver 103 and encodes and decodes the inbound and outbound addresses into formats that are compatible the the respective land line and cellular radio telephone addressing requirements. The system controller 102 can also function to encode paging messages for transmission by the radio frequency transmitter/receiver 103. Telephony signals are transmitted to and received from a radio telephone 105 by at least one antenna 104 coupled to the radio frequency transmitter/receiver 103. The radio frequency transmitter/receiver 103 may also be used to transmit paging messages to the selective call receiver 106. It should be noted that the system controller 102 is capable of operating in a distributed transmission control environment that allows mixing cellular, simulcast, master/slave, or any conventional wide and local area coverage scheme.
Referring to FIG. 2A, a block diagram is shown of the battery 201 powered radio telephone. A radio frequency signal is received or transmitted by the antenna 202. The antenna is coupled to the receiver 203 and transmitter 204 by a diplexer 205. The received signal is routed from the receiver 203 to the control circuitry 206 that recovers any information contained within the received signal. This recovered information is then used to activate the alert 207 (a ringer in the case of a cellular radio telephone) and after answering the call, sustain the connection. When a connection is completed, the user aurally communicates with the other party via the speaker 208 and a microphone 209. Recovered audio from the control circuitry 206 is routed to the speaker which converts electrical energy into acoustical energy thus enabling the user to hear any communications. The microphone 209 is used to convert acoustic energy into electrical energy for use by the control circuitry 206 in modulating the radio frequency carrier produced by the transmitter 204. The user may initiate a call by selecting the proper control 210 and dialing the ntimber of the party to be contacted. When dialed, the number is presented on a display 211 to provide visual feedback for the user.
Referring to FIG. 2B, a block diagram is shown of the battery 212 powered selective call receiver. The selective call receiver operates to receive a signal via an antenna 213. The received signal is routed from the antenna 213 to the receiver 214. The receiver 214 demodulates the received signals using conventional techniques and forwards the demodulated signal to the control circuitry 215, which decodes and recovers information contained within the received signal. In accordance with the recovered information and user controls 216, the selective call receiver presents at least a portion of the information, such as by a display 217, and signals the user via a sensible alert 218 that a message has been received.
Referring to FIG. 3, the front isometric view of the radio telephone/selective call receiver shows the antenna, radio telephone portion 302, loudspeaker 303, display 304, control pad 305 including a dialing keypad and associated operational controls, a microphone 306, and a removably detachable selective call receiver 307. Electrical contacts (not shown) located on the back of the radio telephone portion 302 of the unit are provided for charging the individual power sources contained within the radio telephone and the selective call receiver. Charging is accomplished by folding the lower articulated portion including the selective call receiver upward against the control pad 305 then inserting the folded unit into a charging apparatus (not shown) . Alternatively, a portable power pack can be coupled into a power jack located on the radio telephone portion 302 of the unit for charging.
Referring to FIG. 4A, the front isometric view of the articulated portion of the radio telephone/selective call receiver unit shows the attachment means 401 on which the articulated portion pivots when the complete unit is assembled. The top section 402 of the articulated portion of the radio telephone/selective call receiver unit contains the microphone 403 that is used by the radio telephone. The bottom section 404 comprises a selective call receiver with integral display means 405, function controls 406, and an alert transducer (not shown) .
Referring to FIG. 4B, the front isometric view of the articulated portion of the radio telephone/selective call receiver unit shows the selective call receiver 407 detached from the top section 402 of the articulated portion of the radio telephone/selective call receiver unit 408. Mechanical contacts 409 that reside within the retaining slot for the selective call receiver, provide a connection means for coupling electrical power from the radio telephone to contacts (not shown) located on the top of the selective call receiver. This power is used to replenish charge in the selective call receiver's power source. When the selective call receiver is detached from the radio telephone, a flap 410 is provided to protect the electrical contacts 409 as well as the rails that form the retaining slot. This flap 410 folds flat and locks against the retaining area. When disconnected, the selective call receiver 407 and radio telephone are fully functional as their own independent entities. This feature offers the user additional utility in that they may on occasion choose to carry only the radio telephone or selective call receiver 407. An example of this would be an executive that carries the complete unit in their briefcase would want to be in touch with his office during lunch. The executive would then detach the selective call receiver 407 from the radio telephone, store the radio telephone in their locked briefcase, and carry the selective call receiver 407 to lunch. Because the selective call receiver 407 is much less bulkier than the entire unit and offers a silent alerting (vibratory alert) message storage capability (this feature eliminates audible interruptions and allows the user to defer answering the message) , the user is offered an increased level of convenience.

Claims

1. A system comprising: a radio telephone; and a selective call receiver capable of being removably detached from said radio telephone.
2. The system according to claim 1 wherein said radio telephone functions independently when attached to said selective call receiver.
3. The system according to claim 1 wherein said radio telephone functions independently when detached from said selective call receiver.
4. The system according to claim 1 wherein said selective call receiver functions independently when attached to said radio telephone.
5. The system according to claim 1 wherein said selective call receiver functions independently when detached from said radio telephone.
6. The system according to claim 1 further comprising: means for electrically connecting said radio telephone and said selective call receiver.
7. The system according to claim 1 wherein said radio telephone is capable of receiving a first energy source which provides power to said radio telephone.
8. The system according to claim 7 further comprising: means for charging said first energy source that is used to power said radio telephone.
9. The system according to claim 1 wherein said selective call receiver is capable of receiving a second energy source which provides power to said selective call receiver.
10. The system according to claim 9 further comprising: means for charging said second energy source that is used to power said selective call receiver.
11. A system comprising: a radio telephone for initiating and receiving calls; and a selective call receiver for receiving selective call messages, said selective call receiver having the capability of being removably detached from said radio telephone.
12. The system according to claim 11 wherein said radio telephone functions independently when attached to said selective call receiver.
13. The system according to claim 11 wherein said radio telephone functions independently when detached from said selective call receiver.
14. The system according to claim 11 wherein said selective call receiver functions independently when attached to said radio telephone.
15. The system according to claim 11 wherein the said selective call receiver functions independently when detached from said radio telephone.
16. The system according to claim 11 further comprising: means for electrically connecting said radio telephone and said selective call receiver.
17. The system according to claim 11 wherein said radio telephone is capable of receiving a first energy source which provides power to said radio telephone.
18. The system according to claim 17 further comprising: means for charging said first energy source that is used to power said radio telephone.
19. The system according to claim 11 wherein said selective call receiver is capable of receiving a second energy source which provides power to said selective call receiver.
20. The system according to claim 19 further comprising: means for charging said second energy source that is used to power said selective call receiver.
PCT/US1991/000061 1990-02-09 1991-01-03 Radio telephone with detachable selective call receiver WO1991012673A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US47828490A 1990-02-09 1990-02-09
US478,284 1990-02-09

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994019898A1 (en) * 1993-02-22 1994-09-01 Motorola, Inc. Method and apparatus in a communication system for completing an inbound call
WO1995020273A1 (en) * 1994-01-24 1995-07-27 Motorola Inc. Carry case
WO1996024197A1 (en) * 1995-01-31 1996-08-08 Motorola Inc. Selective call receiver in a battery of a two-way communication device
GB2317288A (en) * 1996-09-13 1998-03-18 Motorola Gmbh A mobile radio with a pager acting as a removable interface
US6587700B1 (en) * 1994-06-23 2003-07-01 At&T Wireless Services, Inc. Personal communicator with flip element display

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263666A2 (en) * 1986-10-06 1988-04-13 Kabushiki Kaisha Toshiba Cordless telephone apparatus
US4882745A (en) * 1987-05-08 1989-11-21 Silver Alan H Cordless headset telephone
US4962528A (en) * 1989-05-22 1990-10-09 Herrera Juan H Beeper amplifier

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0263666A2 (en) * 1986-10-06 1988-04-13 Kabushiki Kaisha Toshiba Cordless telephone apparatus
US4882745A (en) * 1987-05-08 1989-11-21 Silver Alan H Cordless headset telephone
US4962528A (en) * 1989-05-22 1990-10-09 Herrera Juan H Beeper amplifier

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994019898A1 (en) * 1993-02-22 1994-09-01 Motorola, Inc. Method and apparatus in a communication system for completing an inbound call
WO1995020273A1 (en) * 1994-01-24 1995-07-27 Motorola Inc. Carry case
US5535434A (en) * 1994-01-24 1996-07-09 Motorola, Inc. Carry case having paging circuitry section
US6587700B1 (en) * 1994-06-23 2003-07-01 At&T Wireless Services, Inc. Personal communicator with flip element display
WO1996024197A1 (en) * 1995-01-31 1996-08-08 Motorola Inc. Selective call receiver in a battery of a two-way communication device
GB2317288A (en) * 1996-09-13 1998-03-18 Motorola Gmbh A mobile radio with a pager acting as a removable interface
GB2317288B (en) * 1996-09-13 2001-03-28 Motorola Gmbh Mobile radio and method of operation

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