Test for preservation of differentiated service in an internet protocol network
AssigneePathSolutions, Inc.
InventorTimothy G. Titus
Life of this patent
Estimating the term…
Abstract
Measuring a quality of service in an Internet protocol network includes forming no more than one echo request packet in an originating device; transmitting the echo request packet to a destination device; swapping the source and destination addresses in the received echo request packet to form an echo reply packet without allocating memory for a new packet; receiving at the originating system the echo request packet repurposed as the echo reply packet; comparing a DSCP value in the echo request packet to a DSCP value in the echo reply packet; and when the DSCP values from the two packets are the same, asserting a prediction that the network will deliver a preferred quality of service for a streaming message service.
Claims20
A method for measuring a quality of service in an Internet protocol network, comprising:
- forming one echo request packet in an originating device;
- transmitting the echo request packet to a destination device through the Internet protocol network communicatively coupling the originating device to the destination device;
- receiving the echo request packet at the destination device;
- modifying the received echo request packet in the destination device to form an echo reply packet;
- receiving the echo reply packet at the originating device;
- comparing a Differentiated Services Code Point (DSCP) value in the echo request packet to the DSCP value in the echo reply packet;
- and
- when the DSCP value for the parameter in the echo request packet is equal to the DSCP value in the echo reply packet, asserting that Differential Service is preserved in the Internet protocol network from the originating device to the destination device.
The method of claim 6, further comprising asserting that Differential Service is not preserved in the Internet protocol network when a value for DSCP in the echo request packet is not equal to a value for DSCP in the echo reply packet.
Dependencies are inferred from the claim text.