Communication system topology providing dynamic allocation of B-channels

• US 5,553,071 A
• Filed: 10/14/1994
• Issued: 09/03/1996
• Est. Priority Date: 10/14/1994
• Status: Expired due to Term

• Current Assignee: Avaya Incorporated
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Baker, Albert D., Aranguren, William L.
• Primary Examiner(s): Safourek, Benedict V.
• Application Number:
  US08/323,184
• Time in Patent Office: 690 Days
• Field of Search: 370/58.3, 370/85.1, 370/85.2, 370/85.3, 370/85.7, 370/85.8, 370/85.11, 370/85.9, 370/95.1, 370/95.2, 370/110.1, 340/825.03, 340/825.04
• US Class Current: 370/433
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/6435 Bus
• CPC Class Codes: H04L 2012/6454 Random, e.g. Ethernet
• CPC Class Codes: H04L 2012/6456 Channel and bandwidth allocation
• CPC Class Codes: H04L 2012/6475 N-ISDN, Public Switched Telephone Network [PSTN]
• CPC Class Codes: H04Q 11/04 for time-division multiplexing H04Q11/0001 takes precedence

Abstract

Communications systems and methods are directed to a novel communications platform which employs a TDM bus, a TDM bus controller, a passive Ethernet bus, and a centralized Ethernet hub to provide for the communication of data, voice, and/or video signals among a plurality of endpoint devices. The TDM bus controller provides a plurality of B-Channels on the TDM bus. The centralized Ethernet hub is coupled to the TDM bus controller via a control link. Each endpoint device is connected to at least one of the passive Ethernet bus and the TDM bus. The centralized Ethernet hub operates over the passive Ethernet bus to dynamically allocate one or more individual B-Channels of a single B-Channel set amongst a group of endpoint devices, such as telephone equipment, video communications equipment, processors, and/or computing devices. The centralized Ethernet hub provides a logical control channel to each endpoint device for call establishment. Each endpoint device is coupled to the logical control channel over at least one of a first path comprising the passive Ethernet bus and a second path comprising the TDM bus, the TDM bus controller, and the control link. The logical control channel executes B-channel seizure algorithms for establishment of communications to and from selected endpoint devices.

Claims

1. A centralized Ethernet hub being adapted for use in a communications system including:

(i) a TDM bus adapted for connection to one or more endpoint devices;

(ii) a TDM bus controller for providing a set of B-Channels comprised of a plurality of time-division multiplexed B-Channels on the TDM bus;

(iii) a passive bus for providing access to the set of B-Channels; and

(iv) a plurality of endpoint devices, each endpoint device including channel allocation request means coupled to at least one of the passive bus and the TDM bus for requesting one or more B-Channels from the set of B-Channels;

characterized in that the Ethernet hub provides;

(a) a control link for coupling the centralized Ethernet hub to the TDM bus controller;

(b) a plurality of Ethernet communication channels; and

(c) channel allocation means responsive to the channel allocation request means of an endpoint device to allocate one or more individual B-Channels of a single B-Channel set amongst a plurality of endpoint devices.

2. A centralized Ethernet hub as set forth in claim 1 wherein the endpoint devices are telephone equipment, video communications equipment, processors, and/or computing devices.

3. A centralized Ethernet hub as set forth in claim 1 further including logical control channel means for providing a logical control channel to each endpoint device for establishment of communications, each endpoint device being coupled to the logical control channel means over at least one of a first path comprising the passive bus and a second path comprising the TDM bus, the TDM bus controller, and the control link;

the logical control channel means adapted to execute B-Channel seizure algorithms for establishment of communications to and from selected endpoint devices.

4. A communications system comprising:

(a) a TDM bus controller for providing a set of B-Channels comprised of a plurality of time-division multiplexed B-Channels on a TDM bus;

(b) a centralized Ethernet hub for providing a plurality of Ethernet communication channels;

the Ethernet hub including channel allocation means responsive to a channel allocation request means of an endpoint device to allocate one or more individual B-Channels of the B-Channel set amongst a plurality of endpoint devices, and a centralized passive bus controller for controlling electronic communication on a passive Ethernet bus; and

(c) a control link for coupling the centralized passive bus controller to the TDM bus controller;

the communications system adapted for use in conjunction with;

(i) an existing TDM bus adapted for connection to one or more endpoint devices;

(ii) an existing passive Ethernet bus adapted for connection to one or more endpoint devices, and

(iii) an existing plurality of endpoint devices, each endpoint device including channel allocation request means coupled to at least one of the passive Ethernet bus and the TDM bus for requesting one or more B-Channels from the set of B-Channels.

5. A communications system as set forth in claim 4 further including a plurality of endpoint devices, wherein the endpoint devices telephone equipment, video communications equipment, processors, and/or computing devices.

6. A communications system as set forth in claim 5 wherein the centralized passive bus controller further includes logical control channel means for providing a logical control channel to each endpoint device for establishment of communications, each endpoint device being coupled to the logical control channel means over at least one of a first path comprising the passive Ethernet bus and a second path comprising the TDM bus, the TDM bus controller, and the control link;

the logical control channel means adapted to execute B-Channel seizure algorithms for establishment of communications to and from selected endpoint devices.

7. A communications system comprising:

(a) a TDM bus adapted for connection to one or more endpoint devices;

(b) a TDM bus controller for providing a set of B-Channels comprised of a plurality of time-division multiplexed B-Channels on the TDM bus;

(c) a passive Ethernet bus adapted for connection to one or more endpoint devices;

(d) a centralized Ethernet hub for providing a plurality of Ethernet communication channels; and

(e) a control link for coupling the centralized Ethernet hub to the TDM bus controller;

the centralized Ethernet hub including channel allocation means responsive to a channel allocation request means of the endpoint devices to allocate one or more individual B-Channels of a single B-Channel set amongst the plurality of endpoint devices;

the communications system adapted for use in conjunction with a plurality of endpoint devices, each endpoint device including channel allocation request means coupled to at least one of the passive Ethernet bus and the TDM bus for requesting one or more B-Channels from the set of B-Channels.

8. A communications system as set forth in claim 7, further including a plurality of endpoint devices, wherein the endpoint devices are telephone equipment, video communications equipment, processors, and/or computing devices.

9. A communications system as set forth in claim 7, wherein the centralized Ethernet hub further includes logical control channel means for providing a logical control channel to each endpoint device for establishment of communications, each endpoint device being coupled to the logical control channel means over at least one of a first path comprising the passive Ethernet bus and a second path comprising the TDM bus, the TDM bus controller, and the control link;

the logical control channel means adapted to execute B-channel seizure algorithms for establishment of communications to and from selected endpoint devices.

10. A communications system comprising:

(a) a TDM bus adapted for connection to one or more endpoint devices;

(b) time-division multiplex controller means for providing a plurality of time-division multiplexed B-Channels on the TDM bus;

(c) centralized Ethernet hub means for providing a plurality of Ethernet communications channels;

(d) a control link coupling the centralized Ethernet hub means to the TDM bus controller means; and

(e) a B-channel bus for providing a plurality of time-division-multiplexed B-channels;

the Ethernet hub, the TDM bus, the centralized Ethernet hub means, the control link, and the time-division multiplex controller means together comprising dynamic B-Channel allocation means for allocating a single B-Channel set consisting of a plurality of B-Channels among a plurality of endpoint devices such that the B-Channel set is shared among the plurality of endpoint devices;

the dynamic B-Channel allocation means being coupled to the B-Channel bus and capturing selected ones of said B-Channels in response to the channel allocation request means of an endpoint device for establishing a communications link between a plurality of endpoint devices;

the communications system adapted for use in conjunction with a plurality of endpoint devices, each endpoint device being adapted for connection to any of the Ethernet hub and the TDM bus;

at least one endpoint device including channel allocation request means coupled to the Ethernet hub for establishing a communications link between a plurality of endpoint devices.

11. A communications system as set forth in claim 10 wherein the B-Channel set includes a number of B-Channels in the range of 48-192, inclusive.

12. A communications system as set forth in claim 11 wherein each B-Channel set includes 96 B-Channels.

13. The communications system of claim 10 wherein the channel allocation means includes control software distributed amongst a plurality of endpoint devices to provide an endpoint device to endpoint device communications structure that does not require logical switching means connected between endpoint devices.

14. The communications system of claim 10 wherein the communications hub means further includes Ethernet repeater means for providing a dedicated logical control channel on the communications trunk means for establishing communications with at least one endpoint device, such that the logical control channel executes channel seizure algorithms for establishment of communications to and from selected endpoint devices.

15. A communications system comprising:

(a) a TDM bus;

(b) a TDM bus controller for providing a set of B-Channels comprised of a plurality of time-division multiplexed B-Channels on the TDM bus;

(c) a passive Ethernet bus;

(d) a centralized Ethernet hub for providing a plurality of Ethernet communication channels on the passive Ethernet bus;

(e) a plurality of endpoint devices, each endpoint device including channel allocation request means coupled to at least one of the passive Ethernet bus and the TDM bus for requesting one or more B-Channels from the set of B-Channels; and

(f) a control link for coupling the centralized Ethernet hub to the TDM bus controller;

the centralized Ethernet hub including channel allocation means responsive to the channel allocation request means of the endpoint devices to allocate one or more individual B-Channels of a single B-Channel set amongst the plurality of endpoint devices.

16. A communications system comprising:

(a) a TDM bus;

(b) a passive Ethernet bus;

(c) a plurality of endpoint devices, each endpoint device being adapted for connection to any of the TDM bus and the passive Ethernet bus, at least one endpoint device including channel allocation request means coupled to the Ethernet bus for establishing a communications link between a plurality of endpoint devices;

(d) time-division multiplex controller means for providing a plurality of time-division multiplexed B-Channels on the TDM bus;

(e) centralized Ethernet hub means for providing a plurality of Ethernet communications channels on the Ethernet bus; and

(f) a control link coupling the centralized Ethernet hub means to the TDM bus controller means;

the TDM bus, the centralized Ethernet hub means, the control link, and the time-division multiplex controller means together comprising dynamic B-Channel allocation means for allocating a single B-Channel set consisting of a plurality of B-Channels among a plurality of endpoint devices such that the B-Channel set is shared among the plurality of endpoint devices;

the dynamic B-Channel allocation means being coupled to the B-Channel bus and capturing selected ones of said B-Channels in response to the channel allocation request means of an endpoint device for establishing a communications link between a plurality of endpoint devices.

17. The communications system of claim 16 wherein the channel allocation means includes control software distributed amongst a plurality of endpoint devices to provide an endpoint device to endpoint device communications structure that does not require logical switching means connected between endpoint devices.

18. The communications system of claim 16 wherein the communications hub means further includes Ethernet repeater means for providing a dedicated logical control channel on the communications trunk means for establishing communications with at least one endpoint device, such that the logical control channel executes channel seizure algorithms for establishment of communications to and from selected endpoint devices.