US 2014/0153591 A1 · Packet Delay Distribution Rate Filtering

Abstract

To test the timing-recovery process of a receiving (i.e., slave) node in a packet-based network, a packet filter is configured in a test configuration that already contributes a natural delay distribution to the packet flow arriving at the slave node. The resulting delay distribution of the arriving packet flow is the combination of that natural delay distribution and the effects of the packet filter, which deterministically or statistically reduces the number of packets with delays within the anchor value window arriving at the slave node (i.e., received packets having packet delays within the slave node's anchor value window). The packet filter can be adjusted to test the slave node's timing-recovery process for a wide variety of packet-flow conditions (e.g., different rates of packets with delays within the anchor value window).

Claims20

Dependent claims

A machine-implemented method comprising:

(a) a packet filter determining, for a packet in a forward packet flow in a packet-based network, whether or not to shift the packet outside of an anchor value window of a timing-recovery process;
(b) if the packet filter determines to shift the packet outside of the anchor value window, then the packet filter adding a specified non-zero delay offset value to an incoming packet delay value for the packet to generate an outgoing packet delay value for the packet, such that the outgoing packet delay value for the packet will be outside of the anchor value window when the packet arrives at a slave node of the packet-based network, wherein the slave node is configured to perform the timing-recovery process;
and
(c) the packet filter transmitting the packet towards the slave node with the outgoing packet delay value.

1 more element

Dependencies are inferred from the claim text.

Packet Delay Distribution Rate Filtering

Life of this patent

Packet Delay Distribution Rate Filtering

Life of this patent

Abstract

Claims20