Wireless digital personal communications system having voice/data/image two-way calling and intercell hand off provided through distributed logic

• US 5,657,375 A
• Filed: 11/15/1994
• Issued: 08/12/1997
• Est. Priority Date: 01/04/1993
• Status: Expired due to Term

• Current Assignee: SBC Properties, L.P.
• Original Assignee: Ameritech Corp. (AT&T, Inc.)
• Inventors: Zellner, Samuel N., Bannack, Gary J., Holt, Lewis, Westerhold, Morris W., Connolly, David A., Ciannella, Frank A. Jr., Hallman, Kenneth B., Czaplewski, Ronald L.
• Primary Examiner(s): Bost, Dwayne
• Assistant Examiner(s): TROST IV, WILLIAM GEORGE
• Application Number:
  US08/339,913
• Time in Patent Office: 1,001 Days
• Field of Search: 379/58, 379/59, 379/60, 379/61, 379/62, 379/63, 455/33.1, 455/33.2, 455/53.1, 455/54.1, 455/54.2, 455/56.1, 380/28, 380/46, 380/47, 370/95.1, 370/95.3, 370/110.1
• US Class Current: 455/436
• CPC Class Codes: H04M 15/00 Arrangements for metering, time-control or time indication ; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP
• CPC Class Codes: H04M 2203/1091 Fixed mobile conversion
• CPC Class Codes: H04M 3/42229 Personal communication services, i.e. services related to one subscriber independent of his terminal and/or location diverting calls from one subscriber to another subscriber, i.e. two different subscriptions H04M3/54; selecting arrangements in intelligent networks H04Q3/005
• CPC Class Codes: H04M 3/4228 in networks
• CPC Class Codes: H04M 7/00 Arrangements for interconnection between switching centres
• CPC Class Codes: H04Q 2213/13209 ISDN
• CPC Class Codes: H04Q 2213/13339 Ciphering, encryption, security
• CPC Class Codes: H04Q 2213/13513 UPT - personal as opposed to terminal mobility, inc. number portability
• CPC Class Codes: H04Q 2213/13515 authentication, authorisation - fraud prevention
• CPC Class Codes: H04Q 2213/13532 mobile networks
• CPC Class Codes: H04Q 3/0029 Provisions for intelligent networking
• CPC Class Codes: H04W 12/04 Key management, e.g. using generic bootstrapping architecture [GBA]
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 36/08 Reselecting an access point

Abstract

A wireless digital personal communications system (or PCS) having a plurality of intelligent base stations and portable handset terminals, each having a predetermined radio cell coverage area. The radio cell, radio-telephone PCS has a full digital network interface. The personal communications system facilitates direct interconnection and switching of PCS call traffic through the digital network interface and the public switched telephone network, or any switched network. The personal communications system has voice/data/image (or any combination thereof), and incoming and outgoing calling capability. The PCS is fully operational and compatible with any modulation approach selected. The intercell protocol hand-off being provided through distributed logic which is implemented in software that is resident in the intelligent portable handset terminals, in the intelligent base stations, and in the public switched telephone network (or any switched network).

Claims

1. A wireless digital personal communications system comprising in combination:

a plurality of radio cell base stations, each radio cell base station having a respective radio cell coverage area, each radio cell base station comprising;

means for digital communications with a switched network via a digital network interface protocol;

means for assigning a communications channel to a specific handset terminal in the coverage area from a plurality of available communications channels; and

means for effectuating communications between the handset terminals in said radio cell coverage area and a switched network;

a plurality of handset terminals operatively disposed with said radio cell base stations, each handset terminal comprising;

means for receiving and transmitting signal messages and communications messages to one or more of the radio cell base stations;

means for selecting a radio cell base station for location registration of the handset terminal with a switched network;

means for seeking and determining an intercell hand-off from an existing radio cell base station to a second radio cell base station;

at least one switched network, each switched network operatively disposed with said radio cell base stations, each switched network comprising;

means for connecting each of the radio cell base stations to the switched network;

means for effectuating intercell hand-off from a first radio cell coverage area to a second radio cell coverage area;

means for converting the interface protocol to a second protocol for interconnection to a service control point data base; and

means for determining and accepting calls to and from a plurality of switched networks; and

a service control point data base comprising;

means for location registration of the handset terminals with at least one radio cell coverage area,

said personal communications system providing intercell hand-off through distributed logic that is resident in the handset terminals, distributed logic that is resident in the radio cell base stations, and distributed logic that is resident at predetermined locations in the switched network.

2. The wireless digital personal communications system according to claim 1 wherein said plurality of radio cell base stations, said plurality of handset terminals, and said service control point data base further comprise means for authenticating each handset terminal.

3. The wireless digital personal communications system according to claim 1 wherein said plurality of radio cell base stations, said plurality of handset terminals and said service control point data base further comprise means for securing communications between each handset terminal and said radio cell base station in accordance with a predetermined encryption and decryption technique.

4. The wireless digital personal communications system according to claim 1 wherein said plurality of radio cell base stations and said plurality of handset terminals further comprise switched network means for grouping each handset terminal into predetermined zone configurations, said configurations capable of being changed over the air.

5. The wireless digital personal communications system according to claim 1 wherein said switched network and said service control point data base further comprise means for call forwarding an unanswered call to a predetermined location.

6. The wireless digital personal communications system according to any of claims 1-5 where the second protocol is a transaction application protocol.

7. The wireless digital personal communications system according to any of claims 1-5 where said second protocol is an Advanced Intelligent Network (AIN) transaction application protocol.

8. The wireless digital personal communications system according to any of claims 1-5 where said second protocol is an X.25 transaction application protocol.

9. The wireless digital personal communications system according to any of claim 1-5 where the means for location registration of the handset terminals includes a means for storing handset terminal profiles.

10. The wireless digital personal communications system according to any of claims 1-5 where the means for location registration of the handset terminals include a means for storing handset terminal user profiles.

11. The wireless digital personal communications system according to claim 1 wherein said switched network is a public switched telephone network.

12. The wireless digital personal communications system according to claim 1 wherein said digital network interface protocol is ISDN.

13. The wireless digital personal communications system according to claim 1 wherein at least some of the handset terminals are portable.

14. The wireless digital personal communications system according to claim 1 wherein the handset terminals each comprise means for selecting a voice communications channel of an operatively disposed radio cell base station by scanning the available channels, comparing the quality of the signals, and then selecting one of the communications channels.

15. The wireless digital personal communications system according to claim 1 wherein the handset terminal means for seeking and determining an intercell handoff is operative to send a handoff request to a second radio cell base station, said handoff request identifying the respective handset terminal and a first radio cell base station with which the handset terminal is currently in communication.

16. The wireless digital personal communications system according to claim 1 where the radio cell coverage area has a radius of less than 5280 feet.

17. A wireless digital personal communications system comprising in combination:

a plurality of radio cell base station sites having at least one radio cell base station, each radio cell base station site having a respective radio cell coverage area, each radio cell base station comprising;

means for digital communications with a switched network via a digital network interface protocol;

means for assigning a communications channel to a specific handset terminal in the coverage area from a plurality of available communications channels; and

means for effectuating communications between the handset terminals in said radio cell coverage area and a switched network;

a plurality of handset terminal sites, each handset terminal site operatively disposed initially with an associated radio cell base station site, each handset terminal site having a respective radio cell reception area, each handset terminal site having a plurality of handset terminals, each handset terminal comprising;

means for receiving and transmitting signal messages and communications messages to one or more of the radio cell base stations;

means for selecting a radio cell base station for location registration of the handset terminal with a switched network;

means for seeking and determining an intercell hand-off from an existing radio cell base station to a second radio cell base station;

at least one switched network, each switched network operatively disposed with said radio cell base stations, each switched network comprising;

means for connecting each of the radio cell base stations to the switched network;

means for effectuating intercell hand-off from a first radio cell coverage area to a second radio cell coverage area;

means for converting the interface protocol to a second protocol for interconnection to a service control point data; and

means for determining and accepting calls to and from a plurality of switched networks; and

a service control point data base comprising;

means for location registration of the handset terminals with at least one radio cell coverage area,

said personal communications system providing intercell hand-off through distributed logic that is resident in the handset terminals, distributed logic that is resident in the radio cell base stations, and distributed logic that is resident at predetermined locations in the switched network.

18. The wireless digital personal communications system according to claim 17 wherein said plurality of radio cell base stations, said plurality of handset terminals, and said service control point data base further comprise means for authenticating each handset terminal.

19. The wireless digital personal communications system according to claim 17 wherein said plurality of radio cell base stations, said plurality of handset terminals and said service control point data base further comprise means for securing communications between each handset terminal and said radio cell base station in accordance with a predetermined encryption and decryption technique.

20. The wireless digital personal communications system according to claim 17 wherein said plurality of radio cell base stations and said plurality of handset terminals further comprise switched network means for grouping each handset terminal into predetermined zone configurations, said configurations capable of being changed over the air.

21. The wireless digital personal communications system according to claim 17 wherein said switched network and said service control point data base further comprise means for call forwarding an unanswered call to a predetermined location.

22. The wireless digital personal communications system according to claim 17 wherein said switched network is a public switched telephone network.

23. The wireless digital personal communications system according to claim 17 wherein said digital network interface protocol is ISDN.

24. The wireless digital personal communications system according to claim 17 wherein at least some of the handset terminals are portable.

25. The wireless digital personal communications system according to claim 17 wherein the handset terminals each comprise means for selecting a voice communications channel of an operatively disposed radio cell base station by scanning the available channels, comparing the quality of the signals, and then selecting one of the communications channels.

26. The wireless digital personal communications system according to claim 17 wherein the handset terminal means for seeking and determining an intercell handoff is operative to send a handoff request to a second radio cell base station, said handoff request indentifying the respective handset terminal and a first radio cell base station with which the handset terminal is currently in communication.