Methods and apparatus for providing timing analysis for packet streams over packet carriers

A network device, configured to generate timing offsets associated with a network transmission, comprising:

• an egress element configured to send data streams based on an adjusted egress rate;
• a jitter buffer coupled to the egress element and configured to temporarily store packets;
• and
• an ingress component coupled to the jitter buffer and coupled to a circuit emulation service (“CES”) circuit for receiving data packets, wherein the ingress component includes,
• a monitor component configured to monitor incoming packets from a packet switching network (“PSN”);
• a stamp generator coupled to the monitor component and configured to generate a timestamp each time a packet arrives;
• an offset calculator coupled to the stamp generator and configured to calculate time difference between the arrival time of the most recent packet and arrival time of oldest packet stored in a timestamp buffer, wherein the offset calculator includes a timestamp buffer for storing arrival timestamps based on a first-in first-out (“FIFO”) storage sequence, a rate calculator for comparing an oldest timestamp in the timestamp buffer with a newly arrived timestamp to identify an offset, and a log coupled to an ingress rate manager and configured to record rate lock status when the offset falls within a predefined range.

A network device, configured to generate timing offsets associated with a network transmission, comprising:

• an egress element configured to send data streams based on an adjusted egress rate;
• a jitter buffer coupled to the egress element and configured to temporarily store packets;
• and
• an ingress component coupled to the jitter buffer and coupled to a circuit emulation service (“CES”) circuit for receiving data packets, wherein the ingress component includes,
• a monitor component configured to monitor incoming packets from a packet switching network (“PSN”);
• a stamp generator coupled to the monitor component and configured to generate a timestamp each time a packet arrives;
• a timing analyzer coupled to the ingress component and configured to calculate a timing offset in accordance with the first timestamp, wherein the offset calculator includes a timestamp buffer for storing arrival timestamps based on a first-in first-out (“FIFO”) storage sequence, a rate calculator for comparing an oldest timestamp in the timestamp buffer with a newly arrived timestamp to identify an offset, and a log coupled to an ingress rate manager and configured to record rate lock status when the offset falls within a predefined range.