Patent ID: 8064356

Claim:
A system comprising: a session sender configured to define and transmit a sender test packet; and a session reflector communicatively coupled to said session sender and configured to receive said sender test packet from said session sender, determine whether said sender test packet is received by a predetermined time, and upon a determination that said sender test packet is received by said predetermined time, define a response test packet, and transmit said response test packet to said session sender, said response test packet being defined to include data for calculating at least one two-way performance metric, said data including a reflector sequence number and a reflector error estimate determined by said session reflector; and upon a determination that said sender test packet is received after expiration of said predetermined time, identify the sender test packet as an out-of-time sender test packet; not generate said response test packet to the out-of-time sender test packet; and record receipt of, and any data included in, the out-of-time sender test packet.