Algorithm 3.

Queuing Delay Estimator, at each node i.

1. Initialization:${\widehat{d}}_q^i[\mathit{packet.type}]=0$

2. for each packet transmission do

3.   if${\widehat{d}}_q^i[\mathit{packet.type}]=0$then

4.      ${\widehat{d}}_q^i[\mathit{packet.type}]=d_q^i[\mathit{packet.type}]$

5.   else

6.      ${\widehat{d}}_q^i[\mathit{packet.type}]=(1-\alpha ){\widehat{d}}_q^i[\mathit{packet.type}]+{\alpha d}_q^i[\mathit{packet.type}]$

7.   end if

8. end for