METHOD AND EQUIPMENT FOR ESTABLISHING SESSION Russian patent published in 2022 - IPC H04W36/00 

FIELD: wireless communication.

SUBSTANCE: during the establishment of a package data transmission network (hereinafter – PDN) connection in 4G network, a terminal receives single network slice selection assistance information (hereinafter – S-NSSAI) corresponding to the established PDN connection, and a public land mobile network ID (hereinafter – PLMN ID), which indicates that received S-NSSAI is S-NSSAI of a home PLMN. When the terminal makes a decision to transfer the established PDN connection to 5G network, the terminal can use S-NSSAI of a guest PLMN corresponding to PDN connection, which is converted from received S-NSSAI.

EFFECT: providing successful transfer of established PDN connection in 4G network to 5G network in a roaming scenario with home routing.

56 cl, 6 dwg, 5 tbl