Method and apparatus for guaranteeing quality of service in a residential ethernet system
A method and apparatus for ensuring QoS in a synchronous Ethernet bridge are disclosed, in which a classifier classifies an ingress packet according to a PHB mapped to a DSCP value of the packet and provides the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue, a buffer queue with a plurality of queues mapped to priority levels buffers the classified packet, a marker marks the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marks the packet in a predetermined format corresponding to a priority level of the packet, and a synchronous Ethernet scheduler schedules the marked packet.
1. An apparatus for ensuring Quality of Service (QoS) in a Layer 2 (L2) network in which a synchronous Ethernet bridge interfaces with the (L2) network, said apparatus comprising:
a classifier for classifying an ingress packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet and providing the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue;
a buffer queue with a plurality of queues mapped to priority levels, for buffering the classified packet;
a marker for marking the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marking the packet in a predetermined format corresponding to a priority level of the packet; and
a synchronous Ethernet scheduler for scheduling the marked packet;
wherein the marker marks the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet.
2. The apparatus of claim 1 , wherein the classifier classifies the packet as a synchronous packet, if the DSCP value indicates an Expedited Forwarding (EF) PHB.
3. The apparatus of claim 2 , wherein the classifier classifies the packet as a synchronous packet, if the DSCP value indicates a Class Selector (CS) PHB with high precedence.
4. An apparatus for ensuring Quality of Service (QoS) in a synchronous Ethernet bridge, comprising:
a classifier for classifying an ingress packet according to a Per-Hop Behavior (PHB) manned to a Differentiated Service Code Point (DSCP) value of the packet and providing the classified packet to one of a predetermined synchronous packet queue and a predetermined asynchronous packet queue;
a buffer queue with a plurality of queues mapped to priority levels, for buffering the classified packet;
a marker for marking the buffered packet as a synchronous packet or, if the buffered packet is an asynchronous packet, marking the packet in a predetermined format corresponding to a priority level of the packet; and
a synchronous Ethernet scheduler for scheduling the marked packet, wherein the marker marks the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet to 0x3305.
5. A method for ensuring Quality of Service (QoS) in a Layer 2 (L2) network in which a synchronous Ethernet bridge interfaces with the (L2) network, said method comprising machine executable code provided on a non-transitory computer readable medium causing a computer system to execute the steps of:
classifying an ingress packet as one of a synchronous packet and an asynchronous packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet;
buffering the packet in a predetermined highest-priority queue when said packet is determined is classified as a synchronous packet;
marking the buffered packet as a synchronous packet; and
scheduling the marked packet,
wherein the buffered packet is marked as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet.
6. The method of claim 5 , wherein the classification comprises the step of: classifying the packet as a synchronous packet, if the DSCP value indicates an Expedited Forwarding (EF) PHB.
7. The method of claim 6 , wherein the classification comprises the step of:
classifying the packet as an asynchronous packet, if the DSCP value indicates one of an Assured Forwarding (AF) PHB and a best-effort PHB, and
processing the asynchronous packet according to eight priority levels set as an Institute of Electrical and Electronics Engineers (IEEE) 802.1p/q Virtual Local Area Network (VLAN) tag.
8. The method of claim 5 , wherein the classification comprises classifying the packet as a synchronous packet, if the DSCP value indicates a Class Selector (CS) PHB with high precedence.
9. The method of claim 5 , wherein the marking comprises marking the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet to 0x3305.
10. A device for ensuring Quality of Service (QoS) in a Layer 2 (L2) network in which in a synchronous Ethernet bridge interfaces with the (L2) network, said device comprising:
a processor in communication with a non-transitory memory, the processor executing code stored in said memory for
classifying an ingress packet as one of a synchronous packet and an asynchronous packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet;
buffering the packet in a predetermined highest-priority queue, with in said memory, when said packet is determined is classified as a synchronous packet;
marking the buffered packet as a synchronous packet; and
scheduling the marked packet,
wherein the marker marks the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet.
11. The device of claim 10 , wherein the classification comprises the step of: classifying the packet as a synchronous packet, if the DSCP value indicates an Expedited Forwarding (EF) PHB.
12. The device of claim 11 , wherein the classification comprises the step of:
classifying the packet as an asynchronous packet, if the DSCP value indicates one of an Assured Forwarding (AF) PHB and a best-effort PHB, and
processing the asynchronous packet according to eight priority levels set as an IEEE) 802.1p/q Virtual Local Area Network (VLAN) tag.
13. The device of claim 10 , wherein the classification comprises classifying the packet as a synchronous packet, if the DSCP value indicates a Class Selector (CS) PHB with high precedence.
14. A device for ensuring Quality of Service (QoS) in a synchronous Ethernet bridge, comprising:
a processor in communication with a non-transitory memory, the processor executing code stored in said memory for
classifying an ingress packet as one of a synchronous packet and an asynchronous packet according to a Per-Hop Behavior (PHB) mapped to a Differentiated Service Code Point (DSCP) value of the packet;
buffering the packet in a predetermined highest-priority queue, with in said memory, when said packet is determined is classified as a synchronous packet;
marking the buffered packet as a synchronous packet; and
scheduling the marked packet, wherein the marking comprises marking the packet as a synchronous packet by converting an Ether Type (Etype) of a Media Access Control (MAC) header in the packet to 0x3305.