Integrated communication system

• US 5,574,771 A
• Filed: 08/15/1994
• Issued: 11/12/1996
• Est. Priority Date: 08/15/1994
• Status: Expired due to Term

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Greenstein, Lawrence J., Sabnani, Krishan K., Driessen, Peter F.
• Primary Examiner(s): Chan, Jason
• Assistant Examiner(s): Maung, Nay Aung
• Application Number:
  US08/290,168
• Time in Patent Office: 820 Days
• Field of Search: 379/56, 379/57, 379/58, 379/59, 379/60, 455/33.1, 455/33.2, 455/54.1
• US Class Current: 455/413
• CPC Class Codes: H04W 4/12 Messaging; Mailboxes; Announcements
• CPC Class Codes: H04W 76/20 Manipulation of established connections
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A telephone or two-way digital paging communication system providing an alternative partial communication format in which an acknowledgement signal is transmitted from a telephone device in response to a received voice or data signal. The communication system is switchable between different types of communication formats including full two-way voice or data service, partial two-way service and one-way pager service. The communication system may be implemented in a cellular network in which a portable cellular telephone is adapted to transmit signals at different transmission rates so as to increase its operable range.

Claims

1. A telephone system for establishing a connection between communicating devices of a first and a second user, comprising:

a) first and second telephone devices of said first and second users, respectively, at least said first telephone device being a cellular telephone and having a radio transceiver for receiving and transmitting messages, said cellular;

telephone including at least one modem for transmitting data at both a high bit rate and a low bit rate substantially less than said high bit rate;

b) a cellular network for transmitting telephone calls between the first and second telephone devices, said cellular network having a plurality of base stations each with a coverage area for servicing cellular telephone devices located within said coverage area, said cellular network including;

i) means for providing full two-way service at said high bit rate between said telephone devices of said first and second user; and

ii) means for providing partial communication service from said user of said first cellular telephone to said second user via one of said base stations, said partial service enabling a generally long message to be transmitted from said second to said first user at said high bit rate and a limited message of a duration shorter than said long message to be transmitted from said first to said second user at said low bit rate.

2. A telephone system as recited in claim 1, wherein said means for providing partial service is operative to transmit an acknowledgement response selected from one of a plurality of prearranged responses.

3. A telephone system as recited in claim 1, wherein said cellular network further includes:

iii) means for providing one-way pager service to said cellular telephone.

4. A telephone system as recited in claim 3, wherein said cellular network further includes:

iv) means for providing voice mail service wherein transmitted messages from a said telephone device user is stored in a data retrieval system from which said cellular telephone user may retrieve said stored messages at a later time.

5. A telephone system as recited in claim 3, wherein said cellular network further includes switching means for determining when said cellular telephone is located in a said coverage area of said base station at a sufficient distance from a said base station to establish said full two-way voice service with a said second user and to determine when said full two-way voice service is unavailable.

6. A telephone system as recited in claim 5, wherein said switching means is adapted to automatically provide said partial service when said full two-way voice service is determined unavailable.

7. A telephone system as recited in claim 6, wherein said switching means is further adapted to determine when said cellular telephone is located in a said coverage area of a base station at a sufficient distance from a said base station to establish said partial service with a said second user and to determine when said partial service is unavailable.

8. A telephone system as recited in claim 7, wherein said switching means is further adapted to automatically provide said one-way pager service when said partial service is determined unavailable.

9. A telephone system as recited in claim 1, wherein said cellular telephone includes a high speed modem for transmitting messages when said cellular telephone is operating in said full two-way service and said cellular telephone further includes a low speed modem for transmitting messages when said cellular telephone is operating in said partial service.

10. A telephone system as recited in claim 9, wherein said low speed modem utilizes a spread spectrum format whereby said low speed modem will nominally occupy the same bandwidth as said high speed modem.

11. A cellular network for establishing a connection between communicating devices of a first and second user wherein at least one of said communicating devices is a cellular telephone having at least one modem for transmitting data at both a high bit rate and a low bit rate substantially less than said high bit rate, said cellular network comprising:

a) a plurality of microcells with each said microcell having a base station for servicing said at least one cellular telephone with full two-way communication service when said cellular telephone is located within a said microcell; and

b) a plurality of macrocells with each said macrocell having a macrocell base station for providing said at least one cellular telephone with full two-way communication service at said high bit rate when said cellular telephone is located within a coverage area of one of said macrocells, and also for providing said cellular telephone with partial service when said cellular telephone is outside said coverage area, said partial service enabling a generally long message associated with the other communication device to be transmitted from said macrocell base station to said cellular telephone and a limited message of shorter duration than said long message to be transmitted from said cellular telephone to said macrocell base station, wherein said limited message is transmitted at said low bit rate.

12. A cellular network as recited in claim 11, further including switching means for determining when said cellular telephone is within a said microcell and within a said macrocell.

13. A cellular network as recited in claim 12, wherein each said cellular telephone includes control means for enabling said cellular telephone to be switchable between said full two-way service and said partial service when said cellular telephone is within a said microcell.

14. A cellular network as recited in claim 13, wherein each said macrocell base station is adapted to provide one-way pager service to a said cellular telephone when said cellular telephone is outside of a said macrocell.

15. A cellular telephone device comprising:

a) an antenna for receiving and transmitting communication signals;

b) control means connected with said antenna for processing signals related to said communication signals and for selecting between first and second transmission rates for transmitting signals from said antenna;

c) transceiver means connected to said antenna and said control means for receiving and transmitting voice and data signals from and to said antenna, and transporting said voice and data communication signals between said antenna and said control means;

d) a high speed modem connected to said antenna and said control means for transmitting voice and data signals at a first predetermined transmission rate from said antenna; and

e) a low speed modem connected to said antenna and said control means for transmitting data signals at a second predetermined transmission rate less than said first predetermined transmission rate from said antenna.

16. A cellular telephone device as recited in claim 15, wherein said first predetermined transmission rate is approximately 20 kilo bits per second and said second predetermined transmission rate is approximately 20 bits per second.

17. A cellular telephone device as recited in claim 15, wherein said second predetermined transmission rate is variable.

18. A cellular telephone as recited in claim 15, further including display means for displaying message data contained in incoming calls processed in said control means.

19. A cellular telephone as recited in claim 15, wherein said low speed modem utilizes a spread spectrum format, whereby said low speed modem will nominally occupy the same bandwidth as said high speed modem.

20. A two-way digital messaging system for communicating messages between messaging devices of a first and a second user, comprising:

a) messaging device of said first and second users, each said messaging device having a radio transceiver for receiving and transmitting messages with at least one of said messaging devices being a pager device;

b) a two-way pager network for transmitting messages between the messaging devices of said users, said two-way pager network having a plurality of base stations each with a coverage area for servicing a said pager device located within said coverage area, said two-way pager network including;

i) means for providing two-way service between said messaging devices of said first and second users, wherein said means is adapted to select a data bit transmission rate for a pager device in dependence upon a signal strength of signals transmitted between said pager device and a said base station, with lower and higher bit transmission rates being selected for lower and higher signal strength levels, respectively;

ii) means for providing one-way data service from a said base station to a said pager device; and

iii) means for enabling said pager device to be switchable between said two-way service and said one-way data service.

21. A two-way digital system as recited in claim 20, wherein said two-way pager network further includes switching means for determining when a said pager device is located in a said coverage area of a said base station at a sufficient signal strength from a said base station to establish said two-way service with a said second user and to determine when said two-way service is unavailable between a second user and a said pager device.

22. A two-way digital system as recited in claim 21, wherein said switching means is adapted to automatically provide said one-way service when said two-way service is determined unavailable.

23. A two-way digital system as recited in claim 20, wherein said transmission rate of said pager device is within the range of 2 to 1000 bits per second.

24. A two-way digital system as recited in claim 20, wherein said pager device includes a high speed modem for transmitting data messages at a first transmission rate and a low speed modem for transmitting data messages at a second transmission rate which is less than said first transmission rate.

25. A two-way digital system as recited in claim 21, wherein said low speed modem utilizes a spread spectrum format enabling said low speed modem to nominally occupy the same bandwidth as said high speed modem.

26. A two-way digital system as recited in claim 25, wherein said means for providing two-way service is adapted to provide both voice messages and data messages from a said base station to said pager device.

27. A two-way digital system as recited in claim 26, wherein said switching means is adapted to provide voice messages to said pager device when said pager device has a first predetermined signal strength with a said base station and to provide data messages to said pager device when said pager device has a second predetermined signal strength with a said base station wherein said second predetermined signal strength is less than said first predetermined signal strength.

28. In a wireless communications network wherein at least a first wireless or wireline communication terminal is capable of communicating voice/data with at least a second wireless terminal via at least one base station at a first bit rate when the second wireless terminal is within a predetermined coverage area of the base station, a method of communicating, comprising the steps of:

providing, within the second wireless terminal, means for transmitting data at both high and low bit rates;

receiving, by the second wireless terminal, data transmission by the base station;

transmitting data by the second wireless terminal to the base station at the high bit rate in response to the data transmission by the base station;

transmitting data by the second wireless terminal to the base station at the low data rate after a predetermined period of time following the high bit rate transmission by the second wireless terminal if the high bit rate transmission is not received by the base station;

determining, at the base station, whether the base station has received a communication from the second wireless terminal at the high or low bit rate;

establishing full two-way voice/data communication service if the communication from the second wireless terminal is received at the high bit rate;

establishing partial communication service if the communication from the second wireless terminal is received at the low bit rate, wherein data is communicated from the second wireless terminal to the base station at the low bit rate, and data associated with the first communication terminal is transmitted by the base station to the second wireless terminal at the first bit rate.

29. The method according to claim 28, wherein the communication from the second wireless terminal is a response to a transmission by the base station of data associated with the first communication terminal.

30. The method according to claim 28, wherein the high bit rate is about 20 kilobits per second and the low bit rate is in the range of about 1-1000 bits per second.

31. The method according to claim 28, wherein said full two-way communication service comprises transmission by the base station of voice or data information associated with the first terminal to the second terminal of about 20 watts per channel at about 20 kilobits per second and transmission by the second terminal to the base station of voice or data information intended for the first terminal of about 20 milliwatts per channel at about 20 kilobits per second.