Distributed telecommunications switching system

• US 5,495,484 A
• Filed: 10/12/1993
• Issued: 02/27/1996
• Est. Priority Date: 10/12/1993
• Status: Expired due to Term

• Current Assignee: Alcatel-Lucent USA, Inc. (Nokia Corporation)
• Original Assignee: DSC Communications Corp. (Nokia Corporation)
• Inventors: Nickle, Clement R. Jr., Self, L. David, Skoog, Frederick H.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): HOM, SHICK C
• Application Number:
  US08/135,724
• Time in Patent Office: 868 Days
• Field of Search: 370/55, 370/60, 370/60.1, 370/61, 370/94.1, 370/94.2, 370/109, 370/110.1, 370/95.1, 370/95.3, 370/85.12, 379/84, 379/309, 348/12
• US Class Current: 370/338
• CPC Class Codes: H04L 2012/5607 Radio
• CPC Class Codes: H04L 2012/5612 Ring
• CPC Class Codes: H04L 2012/5619 Network Node Interface, e.g. tandem connections, transit switching
• CPC Class Codes: H04L 2012/5626 Network management, e.g. Intelligent nets
• CPC Class Codes: H04L 2012/5672 Multiplexing, e.g. coding, scrambling
• CPC Class Codes: H04Q 11/0062 Network aspects
• CPC Class Codes: H04Q 11/0066 Provisions for optical burst or packet networks
• CPC Class Codes: H04Q 11/0067 Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
• CPC Class Codes: H04Q 11/0478 Provisions for broadband connections
• CPC Class Codes: H04Q 2011/0043 Fault tolerance
• CPC Class Codes: H04Q 2011/0081 Fault tolerance; Redundancy; Recovery; Reconfigurability
• CPC Class Codes: H04Q 2011/0092 Ring
• CPC Class Codes: H04Q 2213/13513 UPT - personal as opposed to terminal mobility, inc. number portability
• CPC Class Codes: H04Q 2213/13532 mobile networks
• CPC Class Codes: H04Q 2213/13535 distributed systems - also domains in service creation
• CPC Class Codes: H04Q 3/0029 Provisions for intelligent networking
• CPC Class Codes: H04Q 3/005 Personal communication services, e.g. provisions for portability of subscriber numbers
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

A distributed personal communication service system (30) includes a plurality of delivery units (14) under the control and supervision of a service unit (12). Each delivery unit (14) receives wireless call information from a plurality of radio transceivers (32) as transmitted by wireless hand held personal telephone units (34) within a zone of coverage (36) of the radio transceivers (32). Each delivery unit (14) provides the switching function and network interfaces to transmit the call information to other delivery units (14) along a fiber optic ring (16) or other wireless or wire line networks. Each delivery unit (14) also outputs call information to the radio transceiver (32) for transmission to and receipt by the wireless personal telephone unit (34). Each delivery unit (14) supports wire line telephony network interfaces through interconnection to central offices (38), local exchange carriers, and interexchange carrier carriers. The service unit (12) controls and directs each delivery unit (14) in the switching of call information from origination to destination.

Claims

1. A distributed telecommunications switching system, comprising:

a plurality of delivery units for providing subscriber line and/or network trunk interfaces to receive and transmit call control information and call traffic information for a particular call, each of said plurality of delivery units distributed throughout the system to provide a local switching function for said call traffic information according to destination and service requirements of said call control information;

a service unit for providing centralized control, management, and maintenance functions for each of said plurality of delivery units in order to direct where and how each of said plurality of delivery units is to deliver said call traffic information in response to said call control information, said service unit providing said centralized control, management, and maintenance functions independently and separately from said local switching function provided by said plurality of delivery units; and

a distributed center stage switching fabric providing a communication path between each of said plurality of delivery units and other of said plurality of delivery units and between said service unit and each of said plurality of delivery units.

2. The system of claim 1, further comprising:

a plurality of radio frequency transceivers each associated with one of said plurality of delivery units for receiving and transmitting call traffic and call control information from and to a plurality of individual radio frequency portable units associated with each radio frequency transceiver, each of said plurality of delivery units receiving said call traffic and call control information from a corresponding originating radio frequency transceiver and delivering said call traffic information to an appropriate destination radio frequency transceiver as directed by said service unit in response to said call control information.

3. The system of claim 2, wherein each of said plurality of delivery units includes a plurality of radio banks to provide wireless interfaces to local subscribers.

4. The system of claim 1, wherein said distributed center stage switching fabric includes a fiber optic ring that provides multiple communication paths for simultaneous delivery of said call traffic and call control information for a plurality of calls and a plurality of call types.

5. The system of claim 1, wherein said distributed center stage switching fabric includes point to point fiber optic connections to provide multiple communication paths for simultaneous delivery of said call traffic and call control information for a plurality of calls.

6. The system of claim 1, further comprising:

a local central office associated with each of said plurality of delivery to allow communications between subscribers served by said plurality of delivery units and subscribers served by said local central office.

7. The system of claim 1, wherein each of said plurality of delivery includes a plurality of channel banks to provide wireline interfaces to local subscribers.

8. The system of claim 1, wherein each of said plurality of delivery includes a common control element to perform switching of said call traffic and call control information to and from other of said plurality of delivery units under the direction of said service unit.

9. The system of claim 1, wherein each of said plurality of delivery units processes call traffic and call control information in asynchronous transfer mode cells for transfer of call traffic information between said plurality of delivery units and call control information between each of said plurality of delivery units and said service unit.

10. The system of claim 1, wherein said service unit provides various services to subscribers of the network, said service unit being adaptable to provide additional services without affecting operation of existing services.

11. The system of claim 1, wherein each delivery unit includes a cable bank to accommodate cable television distribution for telecommunications services.

12. A distributed personal communications services system, comprising:

a plurality of delivery units for providing wireline and wireless communication interfaces to a plurality of wireless subscribers in order to transmit and receive call traffic information and call control information to and from said wireless subscribers, each delivery unit distributed throughout the system to provide local switching of call traffic information to and from said wireless subscribers according to destination and service requirements within said call control information;

a service unit for providing centralized control, management, and maintenance of each delivery unit to direct where and how each delivery unit is to deliver said call traffic information in response to said call control information;

a fiber optic ring for providing a communication path between each delivery unit and other delivery units and between said service unit and each delivery unit, each delivery unit including an add/drop multiplexer for interfacing with said fiber optic ring in order to process and communicate call traffic and call control information through asynchronous transfer mode cells; and

a plurality of radio frequency transceivers associated with each delivery unit for transmitting and receiving said call traffic and call control information to and from said wireless subscribers, each delivery unit receiving said call traffic information from a corresponding originating radio frequency transceiver and delivering said call traffic information to an appropriate destination radio frequency transceiver as directed by said service unit in response to said call control information.

13. The system of claim 12, further comprising:

a local central office associated with each delivery unit to allow communications between a wireless subscriber and a wireline subscriber and between wireline subscribers.

14. The system of claim 12, wherein each delivery unit includes a channel bank to allow communications between a wireless subscriber and a wireline subscriber and between wireline subscribers.

15. The system of claim 12, wherein each delivery unit allows wireline and wireless communications between local subscribers and subscribers on other networks including public and private switched telephone network.

16. The system of claim 12, wherein said service unit locates a particular subscriber and determines that said particular subscriber is capable of communicating call traffic and call control information destined for said particular subscriber, said service unit directing a particular delivery unit associated with a zone of coverage where said particular subscriber is found to establish a communication path to a particular radio frequency transceiver within said zone of coverage and associated with said particular delivery unit and said particular subscriber.

17. The system of claim 16, wherein said service unit controls a transfer of said communication path between delivery units and radio frequency transceivers in the event of subscriber movement from one zone of coverage to a different zone of coverage during a single continuous call.

18. The system of claim 12, wherein said service unit directs a specific delivery unit associated with an originating subscriber to establish an originating connection path for call traffic and call control information from said originating subscriber.

19. The system of claim 18, wherein said service unit controls a transfer of said originating connection path between delivery units and radio frequency transceivers in the event of subscriber movement from one zone of coverage to a different zone of coverage during a single continuous call.

20. The system of claim 12, wherein said service unit performs database queries and initiates call setup procedures for call traffic information destined for external wireline or wireless networks in response to said call control information.

21. A distributed telecommunication switching system, comprising:

a plurality of delivery units each operable to provide at least one of a plurality of telecommunication services, each of said plurality of delivery units being distributed throughout the system and operable to provide a switching function for information to other delivery units according to a telecommunication service associated with said information and according to destination requirements of said information;

a service unit operable to provide control, management, and maintenance functions for each of said plurality of delivery units, said service unit operable to direct how each of said plurality of delivery units is to perform said plurality of telecommunication services said service unit providing said control, management, and maintenance functions independently and separately from said switching function provided by said delivery units; and

a fiber optic ring operable to provide a communication path for said plurality of delivery units and said service unit.

22. The distributed telecommunications switching system of claim 21, wherein said plurality of services include broadband, conventional telephone, video, and wireless services.

23. The distributed telecommunications switching system of claim 21, wherein one of said plurality of delivery units provides different services than another of said plurality of delivery units.

24. The distributed telecommunications switching system of claim 21, wherein said fiber optic ring has a bandwidth allocated to support concurrent multiple services and concurrent multi-service transport of said information.

25. The distributed telecommunications switching system of claim 24, wherein each of said plurality of delivery units dynamically allocates said bandwidth of said fiber optic ring according to said information and services associated with said information.

26. The distributed telecommunications switching system of claim 21, wherein said service unit and said plurality of delivery units are adaptable to provide additional telecommunication services without affecting operation of existing telecommunication services.

27. The distributed telecommunication switching system of claim 21, wherein said fiber optic ring provides multiple communication paths between said plurality of delivery units to allow for multiple transfers of information among said plurality of delivery units.