TY JOUR TI Simulation Model of the PTP Protocol Operation in E2E Mode KW Network synchronization KW PTP KW precision time protocol KW E2E KW frequency-time provision KW time scale JO Proceedings of Petersburg Transport University AU Oparin, E.V. AU Proshin, F.A. AU Oparina, E.V. PY 2026 IS 23 PB FSBEI HE "Emperor Alexander I St. Petersburg State Transport University"