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We consider the defocusing, energy subcritical wave equation $\partial_t^2 u- \Delta u = -|u|^{p-1} u$ in 4 to 6 dimensional spaces with radial initialdata. We define $w=r^{(d-1)/2} u$, reduce the equation above to one-dimensionalequation of $w$ and apply method of characteristic lines. This gives scatteringof solutions outside any given light cone as long as the energy is finite. Thescattering in the whole space can also be proved if we assume the energy decaysat a certain rate as $x\rightarrow +\infty$. This generalize the 3-dimensionalresults in Shen[27] to higher dimensions.

Long time behaviour of finite-energy radial solutions to energy subcritical wave equation in higher dimensions