Patent ID: 8014340

Claim:
A method of optimising a bandwidth usage on a Real-Time Protocol managed link transporting media between a User Equipment and a Media Resource Function of a cellular telecommunications network, the method comprising: sampling, at one of the User Equipment and the Media Resource Function, a rate of packet loss on the link; applying a sliding window to the sampled values, and calculating an average or other statistically representative value across the window at one of the User Equipment and the Media Resource Function; comparing the representative loss rate to a pre-defined acceptable loss rate at one of the User Equipment and the Media Resource Function; if the representative loss rate exceeds the acceptable loss rate and if a pre-defined time period has elapsed since a sending rate over the link was last adapted, then decreasing the sending rate over the link at one of the User Equipment and the Media Resource Function; if the representative loss rate is less than the acceptable loss rate and if a pre-defined good performance time period has elapsed since the sending rate over the link was last adapted, then increasing the sending rate over the link at one of the User Equipment and the Media Resource Function; and in the event that the pre-defined time period and the pre-defined good performance time period have not elapsed since the sending rate was last adapted, keeping the sending rate over the link unchanged.