TY JOUR TI Mathematical Model for Control Channel of GSM-R Radiocommunication Standard KW Radiocommunication KW GSM-R KW communication channel KW control channel KW frame KW communication standard KW model JO Proceedings of Petersburg Transport University AU Boldinov, A.M. AU Privalov, A.A. PY 2022 IS 19 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"