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Structured FRW universe based on LTB junctions along the past light cone

We present a new model universe based on the junction of FRW to flat LTB solutions of Einstein equations along our past light cone, bringing structures within the FRW models. The model is assumed globally to be homogeneous, i.e. the cosmological principle is valid. Local inhomogeneities are modeled as a flat LTB in the vicinity of the observer along the light cone matched to a FRW. As a result it turns out that the Hubble parameter is uniquely defined and differences between different LTB Hubble parameter definitions and that of FRW vanishes. The model is singularity free, always FRW far from the observer along the past light cone, gives way to a different luminosity distance relation as for the CDM/FRW models, a negative deceleration parameter near the observer, and correct linear and non-linear density contrast.