  The initial temperature $T_{i}$, energy density $\varepsilon_{i}$, and
formation time $\tau_{i}$ of the initial state of the QGP formed in the heavy
ion collisions at RHIC and LHC energies are determined using the data driven
Color String Percolation Model (CSPM). Multiparticle production by interacting
strings stretched between projectile and target form a spanning cluster at the
percolation threshold. The relativistic kinetic theory relation for $\eta/s$ is
evaluated as a function of $\it T$ and the mean free path ($\lambda_{mfp}$)
using data and CSPM. $\eta/s$($T_{i}$, $\lambda_{mfp}$) describes the
transition from a strongly interacting QGP at $T/T_{c} \sim 1$ to a weakly
coupled QGP at $T/T_{c} \ge 6$. We find that the reciprocal of $\eta/s$ is
equal to the trace anomaly $\Delta = \varepsilon-3P/T^{4}$ which also describes
the transition. We couple this initial state of the QGP to a 1D Bjorken
expansion to determine the sound velocity $c_{s}^{2}$ of the QGP for 0.85 $\le
T/T_{c} \leq 3$. The bulk thermodynamic quantities and the equation of state
are in excellent agreement with LQCD results.
