Method and apparatus of a communications system having a DMT infrastructure

• US 5,608,725 A
• Filed: 01/26/1995
• Issued: 03/04/1997
• Est. Priority Date: 01/26/1995
• Status: Expired due to Fees

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Markison, Timothy W., Grube, Gary W., Rybicki, Mathew A., Pendleton, Matthew A.
• Primary Examiner(s): Olms, Douglas W.
• Assistant Examiner(s): NGO, RICKY QUOC
• Application Number:
  US08/378,850
• Time in Patent Office: 768 Days
• Field of Search: 370/58.1, 370/58.2, 370/58.3, 370/77, 370/79, 370/85.1, 370/85.7, 370/85.9, 370/85.11, 370/95.1, 370/95.3, 370/110.1, 370/110.2, 370/110.3, 348/6-8, 375/211, 375/219, 375/295, 375/316, 455/3.1, 455/4.1, 455/4.2, 455/53.1, 455/54.1, 379/399
• US Class Current: 370/338
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04M 11/062 using different frequency bands for speech and other data
• CPC Class Codes: H04W 92/12 between access points and access point controllers

Abstract

A communication system (100) includes a primary site (102) coupled to a plurality of secondary sites (104-108) using DMT technology. The primary site (102) includes a controller, a data multiplexing switch, a Discrete Multi-Tone transmitter, and a Discrete Multi-Tone receiver. Each of the secondary sites (104-108) includes a site controller, a subscriber interface, and a secondary Discrete Multi-Tone receiver.

Claims

1. A communication system comprising:

a primary site that includes;

a controller,

a data multiplexing switch operably coupled to the controller, and

a Discrete Multi-Tone transmitter operably coupled to the controller and the data multiplexing switch;

a plurality of secondary sites, wherein each of the plurality of secondary sites includes;

a site controller,

a subscriber interface operably coupled to the site controller, and

a secondary Discrete Multi-Tone receiver operably coupled to the site controller and the subscriber interface; and

a single low pass transmission path, coupling the primary site to the plurality of secondary sites, that conveys a Discrete Multi-Tone symbol stream from the Discrete Multi-Tone transmitter of the primary site to the secondary Discrete Multi-Tone receiver of each of the plurality of secondary sites.

2. The communication system of claim 1, wherein at least one of the plurality of secondary sites further comprises:

a secondary data multiplexing switch operably coupled to the site controller and the subscriber interface; and

a secondary Discrete Multi-Tone transmitter operably coupled to the site controller and the secondary data multiplexing switch; and

wherein the primary site further includes a Discrete Multi-Tone receiver operably coupled to the controller and the data multiplexing switch.

3. The communication system of claim 1, wherein the subscriber interface of at least one of the plurality of secondary sites comprises a radio frequency transceiver such that the at least one of the plurality of secondary sites supports radio frequency communications for subscribers affiliated with the at least one of the plurality of secondary sites.

4. The communication system of claim 1, wherein the subscriber interface of at least one of the plurality of secondary sites comprises a radio frequency transmitter such that the at least one of the plurality of secondary sites supports radio frequency paging operations for subscribers proximately located to the at least one of the plurality of secondary sites.

5. The communication system of claim 1, wherein the subscriber interface of at least one of the plurality of secondary sites comprises a wireline data interface such that the at least one of the plurality of secondary sites provides at least one of video data, audio data, telephone communications, facsimile data, and data files to affiliated subscribers.

6. The communication system of claim 1, wherein the single low pass transmission path comprises a twisted pair telephone wire.

7. The communication system of claim 1, further comprising a repeater serially spliced in the single low pass transmission path when a distance between two of the plurality of secondary sites exceeds a predetermined distance.

8. A communication system infrastructure comprising:

a primary site that includes;

a controller,

a data multiplexing switch operably coupled to the controller,

a Discrete Multi-Tone transmitter operably coupled to the controller and the data multiplexing switch, and

a Discrete Multi-Tone receiver operably coupled to the controller and the data multiplexing switch;

a plurality of secondary sites, wherein each of the plurality of secondary sites includes;

a site controller,

a subscriber interface operably coupled to the site controller,

a secondary Discrete Multi-Tone receiver operably coupled to the site controller and the subscriber interface,

a secondary data multiplexing switch operably coupled to the site controller and the subscriber interface, and

a secondary Discrete Multi-Tone transmitter operably coupled to the site controller and the secondary data multiplexing switch;

a single outbound low pass transmission path, coupling the primary site to the plurality of secondary sites, that conveys a Discrete Multi-Tone symbol stream from the Discrete Multi-Tone transmitter of the primary site to the secondary Discrete Multi-Tone receiver of each of the plurality of secondary sites; and

a single inbound low pass transmission path, coupling the primary site to the plurality of secondary sites, that conveys at least one Discrete Multi-Tone symbol stream from the secondary Discrete Multi-Tone transmitter of at least one of the plurality of secondary sites to the Discrete Multi-Tone receiver of the primary site.

9. A primary site for use in a communication system, the primary site comprising:

a controller;

a data multiplexing switch operably coupled to the controller;

a Discrete Multi-Tone transmitter, operably coupled to the controller and data multiplexing switch, for transmitting a Discrete Multi-Tone symbol stream simultaneously to a plurality of secondary sites via a single outbound low pass transmission path;

a memory operably coupled to the controller; and

a Discrete Multi-Tone receiver, operably coupled to the controller, for receiving at least one Discrete Multi-Tone Symbol stream from at least one of the plurality of secondary sites via a single inbound low pass transmission path.

10. The primary site of claim 9, further comprising a data bus that provides at least part of the operable coupling between the controller, the data multiplexing switch, the Discrete Multi-Tone transmitter, and the Discrete Multi-Tone receiver.

11. The primary site of claim 9, further comprising a control bus that provides at least part of the operable coupling between the controller, the Discrete Multi-Tone transmitter, the data multiplexing switch, and the Discrete Multi-Tone receiver.

12. The primary site of claim 9, further comprising an address bus that provides at least part of the operable coupling between the controller, the memory and the Discrete Multi-Tone receiver.

13. The primary site of claim 9, further comprising an output port and an input port operably coupled to the controller, wherein the input port and the output port provide access to an external database.

14. The primary site of claim 9, further comprising an input port and an output port operably coupled to the controller, wherein the input port and the output port provide interfacing with a system manager.

15. The primary site of claim 9, wherein the controller comprises a processor operably coupled to the memory.

16. The primary site of claim 9, wherein the data multiplexing switch comprises a Time Division Multiplexing switch.

17. The primary site of claim 9, wherein the Discrete Multi-Tone transmitter comprises an Asymmetrical Digital Subscriber Link transmitter.

18. The primary site of claim 9, wherein the Discrete Multi-Tone receiver comprises an Asymmetrical Digital Subscriber Link receiver.

19. A secondary site for use in a communication system, the secondary site comprising:

a site controller,

a subscriber interface operably coupled to the site controller,

a memory operably coupled to the site controller; and

a Discrete Multi-Tone receiver, operably coupled to the site controller and the subscriber interface, for receiving a Discrete Multi-Tone symbol stream transmitted by a primary site via a single outbound low pass transmission path that is shared by the secondary site and at least one other secondary site.

20. The secondary site of claim 19, further comprising:

a data multiplexing switch operably coupled to the site controller; and

a Discrete Multi-Tone transmitter, operably coupled to the site controller and the data multiplexing switch, for transmitting a Discrete Multi-Tone Symbol stream to the primary site via a single inbound low pass transmission path that is shared by the secondary site and the at least one other secondary site.

21. The secondary site of claim 20, further comprising a data bus that provides at least part of the operable coupling between the site controller, the data multiplexing switch, the Discrete Multi-Tone transmitter, the subscriber interface, and the Discrete Multi-Tone receiver.

22. The secondary site of claim 20, further comprising a control bus that provides at least part of the operable coupling between the site controller, the Discrete Multi-Tone transmitter, the data multiplexing switch, the subscriber interface, and the Discrete Multi-Tone receiver.

23. The secondary site of claim 19, further comprising an address bus that provides at least part of the operable coupling between the controller, the memory and the Discrete Multi-Tone receiver.

24. The secondary site of claim 19, wherein the site controller comprises a processor operably coupled to memory.

25. The secondary site of claim 19, wherein the data multiplexing switch comprises a Time Division Multiplexing switch.

26. The secondary site of claim 20, wherein the Discrete Multi-Tone transmitter comprises an Asymmetrical Digital Subscriber Link transmitter.

27. The secondary site of claim 26, wherein the Discrete Multi-Tone receiver comprises an Asymmetrical Digital Subscriber Link receiver.

28. The secondary site of claim 19, wherein the subscriber interface comprises a base interface module such that the secondary site supports two way wireless communications.

29. The secondary site of claim 19, wherein the subscriber interface comprises a paging interface module such that the secondary site supports paging communications.

30. The secondary site of claim 19, wherein the subscriber interface comprises an audio/video interface module such that the secondary site supports at least audio or visual communications.

31. The secondary site of claim 19, wherein the subscriber interface comprises a data interface module such that the secondary site supports at least one of facsimile, data file, or data communications.

32. The secondary site of claim 19, wherein the subscriber interface comprises a plain old telephone interface module such that the secondary site supports plain old telephone communications.

33. A method for a primary site to support a data communication in a communication system, the method comprises the steps of:

obtaining outbound bit loading information from a plurality of secondary sites;

obtaining inbound bit loading information from the plurality of secondary sites;

utilizing the outbound bit loading information to establish an outbound control channel;

utilizing the inbound bit loading information to establish an inbound control channel; and

utilizing the outbound bit loading information to establish an infrastructure path for a data transmission.

34. A method for a secondary site to support a data communication with a primary site in a communication system, the method comprising the steps of:

generating outbound bit loading information when requested by the primary site;

transmitting a training signal when requested by the primary site, such that inbound bit loading information is obtained;

receiving and storing a bit loading table transmitted by the primary site;

receiving and storing carrier channel allocation information transmitted by the primary site; and

the carrier channel allocation information contains relevant information for the secondary site, routing the relevant information to an affiliated target.