Spread spectrum wireless telephone system

• US 5,497,424 A
• Filed: 02/07/1994
• Issued: 03/05/1996
• Est. Priority Date: 06/03/1991
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Omnipoint Data Company, Incorporated
• Inventors: Vanderpool, Jeffrey S.
• Primary Examiner(s): Cain, David C.
• Application Number:
  US08/192,707
• Time in Patent Office: 757 Days
• Field of Search: 375/1, 380/34, 379/59, 379/60, 455/33.1, 455/33.2
• US Class Current: 380/34
• CPC Class Codes: H04B 7/2618 using hybrid code-time division multiple access [CDMA-TDMA]
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04W 36/0066 of control information between different types of networks in order to establish a new radio link in the target network
• CPC Class Codes: H04W 36/14 Reselecting a network or an air interface
• CPC Class Codes: H04W 36/142 over the same radio air interface technology
• CPC Class Codes: H04W 4/16 Communication-related supplementary services, e.g. call-transfer or call-hold
• CPC Class Codes: H04W 76/10 Connection setup
• CPC Class Codes: H04W 84/16 WPBX [Wireless Private Branch Exchange]

Abstract

A system for accessing a telephone system, in which a set of user stations are matched with a set of base stations for connection to a telephone network. Each base station may be coupled directly or indirectly to the telephone network and may be capable of initiating or receiving calls on the telephone network. Each user station may comprise a spread-spectrum transmitter or receiver and may be capable of dynamic connection to selected base stations. A plurality of base stations may be coupled to a private exchange telephone system for coupling user stations in calls outside the telephone network. User stations may use CDMA, FDMA, TDMA or other multiple-access techniques to obtain one or more clear communication paths to base stations. Base stations may be placed at convenient locations or may themselves be mobile. User stations may make and break connections with base stations as the user station moves between service regions, or is otherwise more advantageously serviced by, base stations. User stations may direct requests to and receive information from an enhanced telephone services processor, so as to obtain enhanced telephone services within the telephone network. Base stations may be coupled to each other by means of a private exchange. telephone system or other small business telephone system (such as a PBX, Centrex, or key-type system) so as to couple user stations in calls outside the telephone network. User stations may also be coupled directly or indirectly to the telephone network on their own or by another

Claims

1. A wireless communication system, comprising

a first base station coupled to a telephone network and having means for initiating a call on said telephone network and means for receiving a call on said telephone network,

means for establishing a first communication path between a user station and said first base station, said first communication path comprising a first link supporting spread-spectrum communication,

wherein said first communication path is completed between said first base station and said user station when said user station initiates or receives a call on said telephone network, and wherein said user station is capable of being handed-off from said first base station to a second base station,

means for establishing a second communication path between said first base station and said user station over which said user station is capable of initiating or receiving a different call, said second communication path comprising a second link between said user station and an intermediary communication element coupled to said first base station, and

means for transmitting a set of signals to be communicated between said base station and said user station by multiplexing said signals.

2. A system as in claim 1, wherein said intermediary communication element comprises a cellular base station.

3. A system as in claim 1, wherein said intermediary communication element comprises a cluster controller.

5. A system as in claim 1, wherein said intermediary communication element comprises an augmented base station.

6. A system as in claim 1, wherein a narrowband signal is transmitted over said second communication path.

7. A system as in claim 1, wherein said set of signals are multiplexed using different frequency bands.

8. A system as in claim 1, wherein said set of signals are multiplexed using different spread spectrum codes.

9. A system as in claim 1, wherein said set of sinals are multiplexed using different station identifiers.

10. A system as in claim 1, wherein said set of signals are multiplexed using different timeslots.

4. A system as in claim 16, wherein said second communication path further comprises a link from said intermediary communication element to a private exchange telephone system.