Vector Boson Scattering prospects for High-Luminosity LHC at CMS in the same sign WW final state

A feasibility study is presented for Vector Boson Scattering measurements in the same-sign WW final state, that can be performed during the high luminosity phase of the LHC. Particular emphasis is given to the expected performances of the detector in different upgrade scenarios, which are compared to each other and to the results attained with the current, aged technology.