-Let thus $R_h$, $R_h \geq 0$ be the encoding rate of video sensor $h$, $h \in V$.
-Let $\eta_{hi}$ be the production rate of the $i$ node, for the $h$ session. More precisely, we have
- $$
-\eta_{hi} =
-\left\{
- \begin{array}{rl}
- R_h & \textrm{if $i$ is $h$} \\
- -R_h & \textrm{if $i$ is the sink} \\
- 0 & \textrm{otherwise}
- \end{array}
- \right.$$
+Let thus $R_h$, $R_h \geq 0$,
+be the encoding rate of video sensor $h$, $h \in V$.
+Let $\eta_{hi}$ be the production rate of the node $i$,
+for the session initiated by $h$. More precisely, we have
+$ \eta_{hi}$ is equal to $ R_h$ if $i$ is $h$,
+is equal to $-R_h$ if $i$ is the sink, and $0$ otherwise.