Patent ID: 8830860
Filing Date: 2014-09-09
Classification: H04B,H04J,H04L

Abstract:
1. A method of determining a latency of a path segment in a communication network having multiple path segments, that uses multi-bit data packets, said method comprising generating a test packet for use in determining the latency of each of said multiple path segments in said network, transmitting said test packet between first and second devices coupled to said network at opposite ends of a first path segment, and then between said second device and a third device coupled to opposite ends of a second path segment, storing in said test packet a transmit time when a first preselected bit in said test packet is transmitted from said first device, when said test packet is received by said second device coupled to said network, storing in said second device the difference between (i) the transmit time when said first preselected bit in said test packet is transmitted from said first device and (ii) a receipt time when a second preselected bit in said test packet is received by said second device, and when said test packet is received by said third device coupled to said network, storing in said third device the difference between (i) the transmit time when said preselected bit in said test packet is transmitted from said first device and (ii) a receipt time when a second preselected bit in said test packet is received by said third device.