Patent ID: 11968752
Assignee: CISCO TECHNOLOGY, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. A system comprising:
one or more processors; and, at least one computer-readable storage medium having stored therein instructions which, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
establishing a connection for a device between one of a 2G or 3G network, and a 5G network, by establishing a Gn-4G interworking function (IWF) between a client access network and a packet anchor network that is part of a 5G core network;
while the device is connected within the one of the 2G or 3G network, detecting a switch in an operation mode between an active mode and an idle mode and performing one or more network functions through the Gn-4G IWF by:
establishing a tunnel between a serving gateway and a Gn-Serving GPRS Support Node (Gn-SGSN) when the Gn-4G IWF is a Gn-S4 IWF; and
establishing a tunnel between a packet anchor gateway and the Gn-SGSN when the Gn-4G IWF is a Gn-S5 IWF.