Method and apparatus for transporting deterministic traffic in a Gigabit Passive Optical Network

• US 10,757,490 B2
• Filed: 07/11/2018
• Issued: 08/25/2020
• Est. Priority Date: 06/23/2006
• Status: Active Grant

• Current Assignee: Sbc Knowledge Ventures, L.P.
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Siwko, John, Hall, Andrew Jeffrey
• Primary Examiner(s): Moutaouakil, Mounir
• Application Number:
  US16/032,753
• Publication Number:
  US 20180324506A1
• Time in Patent Office: 776 Days
• CPC Class Codes: H04B 10/272 Star-type networks or tree-type networks
• CPC Class Codes: H04J 14/08 Time-division multiplex systems
• CPC Class Codes: H04J 3/1694 Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers Passive Optical Networks H04Q11/0062
• 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 2011/0064 Arbitration, scheduling or medium access control aspects
• CPC Class Codes: H04Q 2011/0084 Quality of service aspects

Abstract

A system and method are disclosed for transporting deterministic traffic in a gigabit passive optical network. A system that incorporates teachings of the present disclosure may include, for example, an Optical Line Termination (OLT) for exchanging data traffic in a Gigabit Passive Optical Network (GPON) having a controller programmed to generate a timeslot schedule for transport of a desired bandwidth of constant bit rate (CBR) data traffic by selecting one or more timeslots from periodic frame clusters operating according to a GPON Transmission Convergence (GTC) protocol. Additional embodiments are disclosed.

Claims

1. A method for adjusting a time slot schedule comprising a first set of timeslots for transmitting a first type of data to a destination and a second set of timeslots for transmitting a second type of data to the destination, the method comprising:

detecting a change in an amount of the first type of data to be transmitted to the destination;

determining whether a change in an assignment of the first set of timeslots and a change in an assignment of the second set of timeslots supports the change in the amount of the first type of data to be transmitted to the destination; and

generating a new timeslot schedule comprising a plurality of timeslots of a periodic frame cluster in response to the detecting and the determining, wherein the generating the new timeslot schedule comprises increasing a number of the plurality of timeslots of the periodic frame cluster in response to determining that the change in the assignment of the first set of timeslots and the change in the assignment of the second set of timeslots does not support the change in the amount of the first type of data to be transmitted.

2. The method of claim 1, wherein the generating the new timeslot schedule further comprises changing a number of timeslots assigned to the first set of timeslots and changing a number of timeslots assigned to the second set of timeslots.

3. The method of claim 2, wherein the plurality of timeslots comprises the first set of timeslots and the second set of timeslots, the first type of data designated for user data traffic and the second type of data designated for management data traffic.

4. The method of claim 1,

wherein the generating the new timeslot schedule further comprises selecting specific timeslots to create a timeslot pattern across multiple periodic frame clusters.

5. An apparatus for adjusting a time slot schedule comprising a first set of timeslots for transmitting a first type of data to a destination and a second set of timeslots for transmitting a second type of data to the destination, the apparatus comprising:

a processor; and

a memory to store computer program instructions, the computer program instructions when executed on the processor cause the processor to perform operations comprising;

detecting a change in an amount of the first type of data to be transmitted to the destination;

determining whether a change in an assignment of the first set of timeslots and a change in an assignment of the second set of timeslots supports the change in the amount of the first type of data to be transmitted to the destination; and

generating a new timeslot schedule comprising a plurality of timeslots of a periodic frame cluster in response to the detecting and the determining, wherein the generating the new timeslot schedule comprises increasing a number of the plurality of timeslots of the periodic frame cluster in response to determining that the change in the assignment of the first set of timeslots and the change in the assignment of the second set of timeslots does not support the change in the amount of the first type of data to be transmitted.

6. The apparatus of claim 5, wherein the generating the new timeslot schedule further comprises changing a number of timeslots assigned to the first set of timeslots and changing a number of timeslots assigned to the second set of timeslots.

7. The apparatus of claim 6, wherein the plurality of timeslots comprises the first set of timeslots and the second set of timeslots, the first type of data designated for user data traffic and the second type of data designated for management data traffic.

8. The apparatus of claim 5,

wherein the generating the new timeslot schedule further comprises selecting specific timeslots to create a timeslot pattern across multiple periodic frame clusters.

9. A computer readable storage device storing computer program instructions for adjusting a time slot schedule comprising a first set of timeslots for transmitting a first type of data to a destination and a second set of timeslots for transmitting a second type of data to the destination, which, when executed on a processor, cause the processor to perform operations comprising:

detecting a change in an amount of the first type of data to be transmitted to the destination;

determining whether a change in an assignment of the first set of timeslots and a change in an assignment of the second set of timeslots supports the change in the amount of the first type of data to be transmitted to the destination; and

generating a new timeslot schedule comprising a plurality of timeslots of a periodic frame cluster in response to the detecting and the determining, wherein the generating the new timeslot schedule comprises increasing a number of the plurality of timeslots of the periodic frame cluster in response to determining that the change in the assignment of the first set of timeslots and the change in the assignment of the second set of timeslots does not support the change in the amount of the first type of data to be transmitted.

10. The computer readable storage device of claim 9, wherein the generating the new timeslot schedule further comprises changing a number of timeslots assigned to the first set of timeslots and changing a number of timeslots assigned to the second set of timeslots.

11. The computer readable storage device of claim 10, wherein the plurality of timeslots comprises the first set of timeslots and the second set of timeslots, the first type of data designated for user data traffic and the second type of data designated for management data traffic.