Patent ID: 11937225
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. A master radio access network (RAN) node providing a first radio access technology, the master RAN node comprising:
at least one memory storing instructions, and
at least one processor configured to execute the instructions to:
transmit, to a communication terminal, a Non Access Stratum (NAS) message received from a core network node and including first information indicating the communication terminal is permitted to use dual connectivity using a second radio access technology, and
transmit, to the communication terminal, second information including one or more frequency bands corresponding to the second radio access technology and used for dual connectivity with a serving cell associated with the master RAN node,
wherein the second information is used to indicate that the communication terminal has entered a coverage area associated with the second radio access technology provided by a secondary RAN node.