Method for achieving an optimal shaping rate for a new packet flow

A communication network node for achieving an optimal initial shaping rate for a new packet flow on a transport network between said communication network node and a second communication network node in a communication network system, the communication network node comprises:

• a processor arranged to determine shaping rates of ongoing packet flows on said transport network and to select an initial shaping rate for said new packet flow based on said determined shaping rates of ongoing packet flows so as to obtain a maximized fairness among all shaping rates,
• the processor being further arranged to determine said shaping rate of said new packet flow by calculating a fairness optimal initial shaping rate from capacity allocations (CA) of ongoing flows, and the processor being further arranged to calculate said fairness optimal initial shaping rate using the formula Avg(CA)+Var(CA)/Avg(CA), wherein Avg(CA) is an average shaping rate of ongoing flows and Var(CA)/Avg(CA) is the relative variance of a shaping rate of ongoing flows, wherein the communication network node comprises:
• a radio receiver for receiving a radio signal, a radio transmitter for transmitting a radio signal.