Resource pooling system and method in communication systems

• US 6,195,362 B1
• Filed: 11/08/1996
• Issued: 02/27/2001
• Est. Priority Date: 11/08/1996
• Status: Expired due to Term

• Current Assignee: AT&T Corporation (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Darcie, Thomas Edward, Gnauck, Alan H., Lu, Xiaolin
• Primary Examiner(s): TON, DANG T
• Application Number:
  US08/745,764
• Time in Patent Office: 1,572 Days
• Field of Search: 370/431, 370/434, 370/442, 370/510, 370/516, 370/462, 370/444, 370/445, 370/447, 370/449, 370/450, 370/451, 370/454, 370/455, 370/456, 370/459, 370/461, 370/441, 370/535, 370/537, 370/480, 370/458, 370/407, 370/408, 370/254, 370/256, 370/347, 370/345, 370/465, 455/17, 455/77, 455/509, 455/517, 340/825.08, 340/825.5, 340/825.51, 340/825.52, 359/135, 359/136, 359/123, 359/115, 359/113, 359/118
• US Class Current: 370/431
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04Q 11/0001 using optical switching

Abstract

This invention provides a method and apparatus for allocating pools of resources of a communication system to nodes and end users serviced by the nodes. The nodes are coupled to a communications network through interface units. The interface units are organized as a pool and may be either preassigned to each of the nodes or may be dynamically allocated to the nodes based on end user requests. All the nodes of the communication system uses a common frequency band. Each of the nodes is coupled to the communication network through a dedicated channel. Thus, bandwidth available to the end users are greatly expanded without expensive and complex upgrades to existing equipment.

Claims

1. A communication system in a network, comprising:

a plurality of nodes;

a head-end coupled to the nodes, the head-end including;

a controller;

a plurality of network interface units; and

a pooling unit, wherein the pooling unit maps communication signals received from the nodes into combined signals based on resource allocation information generated by the controller, each of the combined signals being transmitted to the network through one of the network interface units.

2. The communication system of claim 1, wherein the network interface units are coupled to the nodes through a signal physical connection.

3. The communication system of claim 1, wherein each of the nodes are associated with a corresponding plurality of end users, the nodes communicating information with the corresponding plurality of end users using a common frequency band.

4. The communication system of claim 1, wherein the controller assigns a channel to an end user based on a predetermined plan.

5. The communication system of claim 1, wherein an end user sends a channel request to the controller and the controller grants a channel to the end user based on the channel request.

6. The communication system of claim 5, wherein the end user searches for a quiet channel and sends the channel request to the controller on one of the quiet channel and a signaling channel, the controller sending a grant message to the end user on one of the quiet channel and the signaling channel to grant the quiet channel to the end user.

7. The communication system of claim 5, wherein the controller broadcasts available channel information on a signaling channel, the end user selecting an available channel as a selected channel and sending the channel request to the controller on one of the selected channel and the signaling channel, the controller sending a grant message to the end user to grant the selected channel to the end user.

8. The communication system of claim 5, wherein the controller broadcasts available channel information on a head-end channel, the end user sending the channel request to the on one of the head-end channel and a signaling channel, the control unit sending a grant message to the end user to grant the head-end channel to the end user.

9. The communication system of claim 5, wherein the channel includes a downstream channel and an upstream channel, the end user receiving information from the controller through the downstream channel and sending other information to the controller through the upstream channel.

10. The communication system of claim 5, wherein if the controller does not grant the channel to the end user, then the end user sends another channel request to the controller or generates a busy signal.

11. The communication system of claim 5, wherein the controller loops back channel requests received on the channel, the channel being granted to the end user if the channel request sent by the end user is also received by the end user on the channel.

12. The communication system of claim 5, wherein the controller receives the channel request from the end user and other channel requests from other end users, if more than one end user requests the channel, the controller selecting one of the more than one end user and grants the channel to the selected end user.

13. The communication system of claim 5, wherein the controller allocates one of the network interface units to a node associated with the end user if a network interface unit is not already allocated to the node, the controller storing a correspondence between the allocated one of the interface units and the node as well as a correspondence between the end user and the granted channel in a memory device.

14. The communication system of claim 5, wherein the controller routes communications addressed to the end user through the allocated one of the network interface units on the granted channel.

15. The communication system of claim 1, wherein the controller and the nodes are coupled by an optical fiber.

16. A method for operating a communication system, comprising:

transferring information between a control unit and a plurality of nodes, the information being transferred between the control unit and each of the plurality of nodes through at least one dedicated channel; and

allocating at least one of a plurality of banks of interface units to each of the nodes, wherein communication signals received from the nodes are mapped to at least one interface unit banks as combined signals.

17. A method for operating a communication system, comprising:

transferring information between a control unit and a plurality of nodes, the information being transferred between the control unit and each of the plurality of nodes through at least one dedicated channel; and

allocating at least one of a plurality of interface units to any one of the nodes, wherein communication signals received from the nodes are mapped to at least one interface unit as combined signals.

18. The method of claim 17, further comprising:

coupling the interface units to the nodes through a single physical connection.

19. The method of claim 17, further comprising:

transferring data between the nodes and a plurality of end users associated with each of the nodes, wherein the data is transferred using a common frequency band.

20. The method of claim 17, further comprising:

assigning a channel to an end user associated with one of the nodes based on a predetermined plan.

21. The method of claim 17, further comprising:

sending a channel request to the control unit to request a channel; and

granting the channel to an end user based on the channel request.

22. The method of claim 21, further comprising:

searching for a quiet channel, wherein the channel request is sent on one of the quiet channel and a signaling channel, the control unit granting the quiet channel to the end user by sending a grant message on one of the quiet channel and the signaling channel.

23. The method of claim 21, further comprising:

broadcasting available channel information on a signaling channel, wherein the end user selects an available channel as a selected channel and sends the channel request on one of the selected channel and the signaling channel, the control unit sending a grant message to the end user to grant the selected channel to the end user.

24. The method of claim 21, further comprising:

broadcasting available channel information on a head-end channel, wherein the end user sending the channel request to the control unit on one of the head-end channel and a signaling channel, the control unit sending a grant message to the end user to grant the head-end channel to the end user.

25. The method of claim 21, further comprising:

sending another channel request to the control unit if the control unit does not grant the channel to the end user.

26. The method of claim 21, further comprising:

generating a busy signal if the control unit does not grant the channel to the end user.

27. The method of claim 21, further comprising:

receiving the channel request from the end user and other channel requests from other end users, wherein if more than one end user requests the channel, the control unit selects one of the more than one end user and grants the channel to the selected end user.

28. The method of claim 21, further comprising:

looping back channel requests received on the channel, the channel being granted to the end user if the channel request sent by the end user is received by the end user on the channel.

29. The method of claim 21, further comprising:

allocating one of the interface units to a node associated with the end user if an interface unit is not already allocated to the node; and

storing a correspondence between the allocated one of the interface units and the node as well as a correspondence between the end user and the granted channel in a memory device.

30. The method of claim 21, further comprising:

routing communications addressed to the end user through the allocated one of the interface units on the granted channel.

31. A communication system in a network, comprising:

a plurality of nodes;

a head-end coupled to the nodes, the head-end including;

a controller;

a plurality of banks of network interface units; and

a pooling unit, wherein the pooling unit maps communication signals received from the nodes into combined signals based on resource allocation information generated by the controller, each of the combined signals being transmitted to the network through one of the network interface units.