TY JOUR TI MODEL OF CALCULATING DIFFICULTY OF NEW GENERATION OPTICAL COMMUTATION SYSTEMS KW optical switch KW non-blocking capacity KW self-routing KW multi-stage scheme KW switching difficulty JO Vestnik of Astrakhan State Technical University. Series: Management, computer science and informatics AU Nguyen, T.. AU Barabanova, E.. AU Vytovtov, K.. PY 2019 IS 2019 PB Astrakhan State Technical University