Facilitating bandwidth allocation in a passive optical network

• US 7,430,221 B1
• Filed: 12/26/2003
• Issued: 09/30/2008
• Est. Priority Date: 12/26/2003
• Status: Expired due to Fees

• Current Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Original Assignee: Alcatel-Lucent SA (Nokia Corporation)
• Inventors: Waters, Kenneth, Kovacs, Andras, Mallory, Cha'Masian
• Primary Examiner(s): Vu; Huy D.
• Assistant Examiner(s): Phung; Luat
• Application Number:
  US10/746,075
• Time in Patent Office: 1,740 Days
• Field of Search: 370/477, 370/468, 713/2, 717/168
• US Class Current: 370/477
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062

Abstract

A bandwidth allocation system configured for in-service upgrading of bandwidth allocation functionality comprises dynamic bandwidth allocation software, a first processor, a second processor, first memory and second memory. The bandwidth allocation software includes an image representing firmware configured for determining bandwidth allocation requirements. A first processor interprets the firmware for facilitating determination of bandwidth allocation settings for a plurality of optical network termination units of a PON system. The second processor interprets the software for managing information upon which the bandwidth allocation settings are dependent.

Claims

1. A bandwidth allocation system, comprising:

dynamic bandwidth allocation software including an image representing firmware configured for determining bandwidth allocation requirements;

a first processor that interprets said firmware for facilitating determination of bandwidth allocation settings for a plurality of optical network termination units of a Passive Optical Network system;

a second processor interpreting said software for managing information upon which said bandwidth allocation settings are dependent, determining revised bandwidth allocation parameters for altering the bandwidth allocation settings, and configuring the revised version of said bandwidth allocation parameters for said firmware prior to loading said firmware,

wherein said revised bandwidth allocation functionality includes one of;

adjusting a bandwidth recalculation time interval, calculating a bandwidth adjustment amount, calculating a number of idle cells to be received for initiating a bandwidth recalculation operation, and calculating a buffer zone size;

first memory from which a current version of said firmware is accessible by the first processor; and

second memory from which said software is accessible by the second processor, wherein said second memory is different than said first memory.

2. The system of claim 1 wherein said firmware and the first processor are comprised by a field programmable gate array.

3. The system of claim 1:

wherein said first memory includes a portion from which a current version of said firmware is accessible and a portion including instructions that the first processor executes in accordance with during upgrade to a revised version of said firmware.

4. The method of claim 3 wherein the first processor and said first memory are comprised by a field programmable gate array.

5. The system of claim 3 wherein the revised version of said firmware provides for altered bandwidth allocation functionality with respect to the current version of said firmware.

6. The system of claim 1 wherein the first processor:

analyzes idle-cell information;

determines bandwidth allocation parameters dependent upon said idle-cell information; and

facilitates transmission of at least a portion of said bandwidth allocation parameters to a processor of the Passive Optical Network system.

7. The system of claim 1 wherein said software is configured for facilitating in-service alteration of bandwidth allocation functionality, wherein facilitating in service alteration of bandwidth allocation functionality includes facilitating in-service upgrading of said firmware.

8. The system of claim 1 wherein said software is configured for:

creating a revised version of said firmware;

instructing the first processor to achieve an idle state;

loading the revised version of said firmware to said first memory while the first processor is in the idle state; and

instructing the first processor to execute in accordance with said firmware after loading the revised version of said firmware.

9. The system of claim 8, further comprising:

at least one grant generator, wherein said at least one grant generator operates in accordance with last-known bandwidth settings with respect to instructing the first processor to achieve the idle state.

10. The system of claim 1, further comprising:

software configured for facilitating at least one of altering a bandwidth recalculation time interval, altering a bandwidth adjustment amount, altering a number of idle cells to be received for initiating a bandwidth recalculation operation, and altering a buffer zone size, wherein said software performs such altering without having to freeze bandwidth allocation calculations.

11. The system of claim 1, further comprising:

at least one grant generator configured for producing data grants in accordance with said bandwidth allocation settings.

12. The system of claim 11 wherein said firmware, the first processor and said at least one grant generator are comprised by a common system hardware element.

13. The system of claim 12 wherein the common system hardware element is a field programmable gate array.

14. A method for facilitating bandwidth allocation in a network system, comprising:

discontinuing operation of a first processor in accordance with dynamic bandwidth allocation firmware residing in first memory;

determining bandwidth allocation settings independent of said dynamic bandwidth allocation firmware;

receiving a revised version of said bandwidth allocation firmware to said first memory;

resuming operation of the first processor in accordance with the revised version of said bandwidth allocation firmware after performing loading of said revised version, thereby enabling in-service upgrade of said firmware;

determining revised bandwidth allocation parameters for altering bandwidth allocation functionality;

configuring the revised version of said bandwidth allocation firmware to reflect said revised bandwidth allocation parameters, wherein configuring the revised version of the bandwidth allocation firmware is performed prior to loading the revised version of the bandwidth allocation firmware;

wherein said determining revised bandwidth allocation parameters and configuring the revised version are facilitated by a second processor executing in accordance with dynamic bandwidth allocation software accessible from second memory different than said first memory;

wherein said configuring the revised version includes altering a current version of said firmware for providing revised bandwidth allocation functionality;

wherein said revised bandwidth allocation functionality includes one of;

adjusting a bandwidth recalculation time interval, calculating a bandwidth adjustment amount, calculating a number of idle cells to be received for initiating a bandwidth recalculation operation, and calculating a buffer zone size.

15. The method of claim 14 wherein determining bandwidth allocation settings independent of said dynamic bandwidth allocation firmware includes instructing a grant generator to determine bandwidth allocation settings in accordance with last-known bandwidth settings with respect to instructing the first processor to discontinue execution in accordance with said dynamic bandwidth allocation firmware.

16. The method of claim 14 wherein:

discontinuing operation of the first processor in accordance with dynamic bandwidth allocation firmware includes determining last-known bandwidth allocation settings and instructing the first processor to achieve an idle state; and

determining said bandwidth allocation settings independent of said dynamic bandwidth allocation firmware is performed in accordance with said last-known bandwidth allocation settings.

17. A bandwidth allocation system, comprising:

at least one data processing device;

first memory;

second memory different than said first memory;

instructions processable by said at least one data processing device; and

an apparatus within a Passive Optical Network from which said instructions are accessible by said at least one data processing device;

wherein said instructions am configured for enabling said at least one data processing device to facilitate;

discontinuing operation of a first processor in accordance with dynamic bandwidth allocation firmware residing in first memory;

determining bandwidth allocation settings independent of said dynamic bandwidth allocation firmware;

receiving a revised version of said bandwidth allocation firmware to said first memory; and

resuming operation of the first processor in accordance with the revised version of said bandwidth allocation firmware after performing loading of said revised version, thereby enabling in-service upgrade of said firmware;

wherein said instructions are further configured for enabling said at least one data processing device to facilitate;

determining revised bandwidth allocation parameters for altering bandwidth allocation functionality; and

configuring the revised version of said bandwidth allocation firmware to reflect said revised bandwidth allocation parameters, wherein configuring the revised version of the bandwidth allocation firmware is performed prior to loading the revised version of the bandwidth allocation firmware;

wherein said determining revised bandwidth allocation parameters and configuring the revised version are facilitated by a second processor executing in accordance with dynamic bandwidth allocation software accessible from second memory different than said first memory;

wherein said revised bandwidth allocation functionality includes one of;

adjusting a bandwidth recalculation time interval, calculating a bandwidth adjustment amount, calculating a number of idle cells to be received for initiating a bandwidth recalculation operation, and calculating a buffer zone size.

18. The system of claim 17 wherein determining bandwidth allocation settings independent of said dynamic bandwidth allocation firmware includes instructing a grant generator to determine bandwidth allocation settings in accordance with last-known bandwidth settings with respect to instructing the first processor to discontinue execution in accordance with said dynamic bandwidth allocation firmware.

19. The system of claim 17 wherein:

discontinuing operation of the first processor in accordance with dynamic bandwidth allocation firmware includes determining last-known bandwidth allocation settings and instructing the first processor to achieve an idle state; and

determining said bandwidth allocation settings independent of said dynamic bandwidth allocation firmware is performed in accordance with said last-known bandwidth allocation settings.

20. The system of claim 17 wherein configuring the revised version includes altering a current version of said firmware for providing revised bandwidth allocation functionality.

21. The system of claim 20 wherein said revised bandwidth allocation functionality includes at least one of functionality dependent upon a bandwidth recalculation time interval, functionality dependent upon a bandwidth adjustment amount, functionality dependent upon a number of idle cells to be received for initiating a bandwidth recalculation operation, and functionality dependent upon a buffer zone size.