Private/residential code division multiple access wireless communication system

• US 6,529,491 B1
• Filed: 11/05/1998
• Issued: 03/04/2003
• Est. Priority Date: 11/05/1997
• Status: Expired due to Term

• Current Assignee: Apple Inc.
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Ghaleb, Ibrahim, Chenhong, Huang, Chang, Kim
• Primary Examiner(s): Olms, Douglas
• Assistant Examiner(s): NGUYEN, BRIAN D
• Application Number:
  US09/186,534
• Time in Patent Office: 1,580 Days
• Field of Search: 370/335, 370/342, 370/336, 370/203, 370/252, 370/229, 370/441, 370/515, 370/310, 370/320, 370/328, 370/479, 455/403, 455/426, 455/447
• US Class Current: 370/335
• CPC Class Codes: H04W 16/16 for PBS [Private Base Station] arrangements
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service

Abstract

The private/residential wireless communication system uses the code division multiple access air interface to provide communication with radiotelephones. The present invention provides support for both physical and virtual private systems. A radiotelephone monitors the broadcast channel of the public system to obtain private system information. The radiotelephone use the broadcast information together with pre-programmed stored private system information in the radiotelephone memory to acquire and register with the private systems. If the radiotelephone locates a private system that is not stored in its memory, it obtains relevant information for registering with that system. The radiotelephone then stores the information of accepting systems. This information is displayed so that a system can be chosen. The radiotelephone then registers with the chosen system.

Claims

1. A method for radiotelephone operation in a wireless communications system using CDMA air interface, the wireless communications system comprising a public system and a plurality of underlaid private systems, the radiotelephone having a display and memory that stores private systems information, the method comprising the steps of:

the public system broadcasting private systems information on a predetermined paging channel;

the radiotelephone monitoring the predetermined paging channel; and

the radiotelephone locating and acquiring a subset of private systems of the plurality of underlaid private systems in response to the broadcast private systems information and the stored private systems information by;

matching broadcast user zone identifications supported by the plurality of underlaid private systems to stored user zone identifications in the radiotelephone;

if a single stored user zone identification is matched, attempting to access a corresponding private system of the plurality of underlaid private systems;

if multiple stored user zone identifications are matched, using a predetermined priority list to select and attempt access a corresponding private system of the plurality of underlaid private systems; and

if an initial access of the corresponding private system is not successful, attempting to access another private system supporting the user zone identification.

2. A method for radiotelephone operation in a wireless communication system using CDMA air interface, the wireless communication system including a public system and a plurality of underlaid private systems, the radiotelephone having a display and memory, the method comprising:

receiving broadcast information from the public system;

attempting to retrieve private system/user zone information from the broadcast information;

if the broadcast information includes private system/user zone, storing the private system/user zone information in memory;

attempting to retrieve additional private system/user zone information from memory;

compiling all retrieved private system/user zone information;

determining at least one private system of the plurality of underlaid private systems to access based upon the all retrieved private system/user zone information by matching broadcast user zone identifications supported by the plurality of underlaid private systems to user zone identifications stored in the radiotelephone;

if a single stored user zone identification is matched, selecting and attempting to access a corresponding first private system of the plurality of underlaid private systems;

if multiple stored user zone identifications are matched, using a predetermined priority list to select, and attempt to access a corresponding first private system of the plurality of underlaid private systems; and

if an initial access of the first private system is not successful, selecting and attempting to access a second private system corresponding to a matched user zone identification.

3. The method of claim 2, further comprising if attempting to register with the first private system is unsuccessful, attempting to register with the public system.

4. The method of claim 2, further comprising:

displaying at least one matched user zone identification to a user of the radiotelephone on the display;

receiving instructions from the user regarding private system selection; and

based upon the instructions from the user, determining the first private system.

5. The method of claim 2, wherein the broadcast information from the public system does not include user zone identifications.

6. The method of claim 2, wherein:

the public system and the plurality of underlaid private systems share a common carrier frequency; and

each of the public system and the plurality of underlaid private systems has a unique respective pseudo-noise offset.

7. The method of claim 2, wherein:

the public system operates on a first carrier frequency;

the plurality of underlaid private systems operate on a second carrier frequency; and

each of the plurality of underlaid private systems has a unique respective pseudo-noise offset.

8. The method of claim 2, wherein each of the plurality of underlaid private systems corresponds to a respective premises.

9. A radiotelephone that operates in a wireless communication system using CDMA air interface, the wireless communication system including a public system and a plurality of underlaid private systems, the radiotelephone having a display and memory, the radio telephone comprising:

means for receiving broadcast information from the public system;

means for attempting to retrieve private system/user zone information from the broadcast information;

means for, if the broadcast information includes private system/user zone, storing the private system/user zone information in memory;

means for attempting to retrieve additional private system/user zone information from memory;

means for compiling all retrieved private system/user zone information;

means for determining at least one private system of the plurality of underlaid private systems to access based upon the all retrieved private system/user zone information by matching broadcast user zone identifications supported by the plurality of underlaid private systems to user zone identifications stored in the radiotelephone;

means for, if a single stored user zone identification is matched, selecting and attempting to access a corresponding first private system of the plurality of underlaid private systems;

means for, if multiple stored user zone identifications are matched, using a predetermined priority list to select, and attempt to access a corresponding first private system of the plurality of underlaid private systems; and

means for, if an initial access of the first private system is not successful, selecting and attempting to access a second private system corresponding to a matched user zone identification.

10. The radiotelephone of claim 9, further comprising:

means for, if attempting to register with the first private system is unsuccessful, attempting to register with the public system.

11. The radiotelephone of claim 9, further comprising:

means for displaying at least one matched user zone identification to a user of the radiotelephone on the display;

means for receiving instructions from the user regarding private system selection; and

means for, based upon the instructions from the user, determining the first private system.

12. The radiotelephone of claim 9, wherein the broadcast information from the public system does not include user zone identifications.

13. The radiotelephone of claim 9, wherein:

the public system and the plurality of underlaid private systems share a common carrier frequency; and

each of the public system and the plurality of underlaid private systems has a unique respective pseudo-noise offset.

14. The radiotelephone of claim 9, wherein:

the public system operates on a first carrier frequency;

the plurality of underlaid private systems operate on a second carrier frequency; and

each of the plurality of underlaid private systems has a unique respective pseudo-noise offset.

15. The radiotelephone of claim 9, wherein each of the plurality of underlaid private systems corresponds to a respective premises.