Enhanced upstream data traffic management for EPON
View Patent ↗To enhance the upstream data traffic management in an EPON, a scheme is employed to allocate transmission windows for upstream data transmitted from the subscribers' ONUs to an OLT. The queues of a logical link are grouped into queue containers, and the OLT allocates upstream transmission windows to the queue containers. Logical links assigns the upstream transmission window allocated to a queue container to the queues in the queue containers.
1. A method for enhancing traffic management for an optical line termination (OLT) in an optical communication system, the method comprising:
identifying, by the OLT, associations of a plurality of queues of data packets in an optical network unit (ONU) with a plurality of queue containers in the ONU, wherein each queue container hosts two or more of the plurality of queues of data packets and each of the plurality of queues is hosted by one and only one such queue container, each of the plurality of queues being associated with a different traffic priority;
receiving, by the OLT, a first message from the ONU in the optical communication system through a network, the first message specifying transmission demands for transmitting the data packets in the plurality of queues through the network;
determining, by the OLT, an allocation of transmission windows among the plurality of queue containers based at least in part on the transmission demands specified in the first message;
generating, by the OLT, a second message containing the allocation of transmission windows; and
communicating, by the OLT, the second message to the ONU through the network.
2. The method of claim 1 , wherein data packets containing the first message are in a queue associated with a high traffic priority.
3. The method of claim 1 , wherein the ONU is communicatively coupled to a plurality of Ethernet ports, and wherein each of the plurality of queue containers being associated with one and only one Ethernet port and hosting queues of data packets originated from the associated Ethernet port.
4. The method of claim 1 , wherein the OLT is configured to provide a guaranteed quality of service for each of the plurality of queue containers.
5. The method of claim 4 , wherein the guaranteed quality of service for a queue container comprises a guaranteed minimum bandwidth to be shared by queues hosted by the queue container.
6. The method of claim 1 , wherein the ONU comprises a logical link.
7. The method of claim 1 , wherein the first message is a REPORT message as defined in IEEE 802.3ah and the second message is a GATE message as defined in IEEE 802.3ah.
8. An optical line termination (OLT) in an optical communication system, comprising:
a chipset; and
a memory unit comprising a persistent memory that contains microcode for execution by the chipset to cause the chipset to perform the operations:
identifying associations of a plurality of queues of data packets in an optical network unit (ONU) with a plurality of queue containers in the ONU, wherein each queue container hosts two or more of the plurality of queues of data packets and each of the plurality of queues is hosted by one and only one such queue container, each of the plurality of queues being associated with a different traffic priority;
receiving a first message from the ONU in the optical communication system through a network, the first message specifying transmission demands for transmitting the data packets in the plurality of queues through the network;
determining an allocation of transmission windows among the plurality of queue containers based at least in part on the transmission demands specified in the first message;
generating a second message containing the allocation of transmission windows; and
communicating the second message to the GNU through the network.
9. The OLT of claim 8 , wherein data packets containing the first message are in a queue associated with a high traffic priority.
10. The OLT of claim 8 , wherein the ONU is communicatively coupled to a plurality of Ethernet ports, and wherein each of the plurality of queue containers being associated with one and only one Ethernet port and hosting queues of data packets originated from the associated Ethernet port.
11. The OLT of claim 8 , wherein the OLT is configured to provide a guaranteed quality of service for each of the plurality of queue containers.
12. The OLT of claim 11 , wherein the guaranteed quality of service for a queue container comprises a guaranteed minimum bandwidth to be shared by queues hosted by the queue container.
13. The OLT of claim 8 , wherein the ONU comprises a logical link.
14. The OLT of claim 8 , wherein the first message is a REPORT message as defined in IEEE 802.3ah and the second message is a GATE message as defined in IEEE 802.3ah.