  We study rate-distortion problems of a Poisson process using a group
theoretic approach. By describing a realization of a Poisson point process with
either point timings or inter-event (inter-point) intervals and by choosing
appropriate distortion measures, we establish rate-distortion problems of a
homogeneous Poisson process as ball- or sphere-covering problems for
realizations of the hyperoctahedral group in $\mathbb{R}^n$. Specifically, the
realizations we investigate are a hypercube and a hyperoctahedron. Thereby we
unify three known rate-distortion problems of a Poisson process (with different
distortion measures, but resulting in the same rate-distortion function) with
the Laplacian-$\ell_1$ rate-distortion problem.
