Ø
ØConsider the matrix Qv, whose entries are the measured QoS values r≥0 over links (i,j) whenever such a link
exists, or otherwise have an initial value, e.g. +∞ for delay and variance or
0 for bandwidth.
ØThe matrix Kv provides us with the ``best QoS value'' for
every path between every pair of vertices (i,j).
Ø
Ø or
Ø
ØWhere the operator between two real valued matrices B, C
is defined as
Ø
Ø The operator
between two QoS parameters depends on the QoS metric that is being considered
and can be the addition (+) for delay and variance, the minimum (min) for
bandwidth etc. The is also an
operator that depends on the specific QoS metric q, and selects the
``best value'' among the elements on which it operates, e.g. in case of the
delay, loss or variance metric it will obtain the minimum value, while
for bandwidth it will select the maximum value, for all paths going from i to j.