Patent ID: 6728209
Filing Date: 2004-04-27
Classification: H04L

Abstract:
A method for use in a packet communication system for calculating a real-time estimate of a quality of service metric for the packet communication system delivering packets to a Jitter Absorption Buffer (JAB), the JAB comprising: a set of storage slots corresponding to a set of memory addresses, a Current Read Pointer, and a Tail Pointer; the JAB having a drain rate of R, the method comprising:A) initializing: A LWM value; A HWM value; and A Timer running for period P; B) Placing an incoming packet into a storage slot in the JAB corresponding to a memory address; C) Calculating the number of Buffer Spaces Used; D) If Buffer Spaces UsedE) If Buffer Spaces Used>HWM then HWM=Buffer Spaces Used; and F) If Timer has reached time P â€ƒTHEN Store the current value for (HWMâˆ’LWM)/R for the current period P; and GOTO Step A; â€ƒELSE GOTO Step B.