5.1 Interface to FCM

The two kernel modules of FCM will be loaded by the user using the insmod or modprobe tools provided with the Debian linux distribution. If the user wishes to unload one of the modules, the rmmod tool, again provided with Debian, will be used to remove it. Additionally, when logging is required, the user will run the separate logging component, which will be a command line interface.

The following options will be accepted by the Router component:

• maxrate
  Type: int
  The rate of the low bandwidth link from the Router, in kilobits/sec. There is no default value, so this must be specified.
• bval
  Type: int
  The value of $b$, used to determine the sensitivity of the queue to the number of streams passing through the Router. Default value is 10.
• q_min
  Type: int
  The queue size above which $p(q)$ becomes non-zero, specified in packets. Default value of 30 packets.

The following options will be accepted by the Receiver component:

• tauval
  Type: int
  The value of $\tau$ in [4], which affects the rate at which the window increases. It has units of Bytes/sec and a default value of 1.
• alphaval
  Type: int
  The value corresponding to $\alpha$ in [4], which is a smoothing factor. The value here is divided by 100 to give the value of $\alpha$. The interval of alphaval is [1,100], specified as an integer. The default value is 25.
• ps_thresh
  Type: int
  The value corresponding to PS_THRESH, specified as a positive integer, but corresponding to a real negative number. The value here is an integer, which has the following relationship to PS_THRESH: ${\rm PS\_THRESH} = - \frac{{\rm ps\_thresh}}{100}$. The default value is 20.