Before revision:  To this extent, we decompose the problem in two nested optimization steps: in the inner one we characterize the optimal operating point of the network subject to a required energy consumption figure, while in the  outer step , we provide optimal energy management policies to make the system self-sufficient , given the the statistical description of the energy source .
After revision:  To this extent, we decompose the problem in two nested optimization steps: in the inner one we characterize the optimal operating point of the network subject to a required energy consumption figure, while in the inner step characterizes the optimal network operating point subject to an average energy consumption constraint, while the outer step , we provide optimal energy management policies to make the system self-sufficient , given the the statistical description of the energy source .