Patent ID: 11924900
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication terminal comprising:
a memory; and
one or more processors, comprising hardware, configured to:
send an Attach Request message to a MME (Mobility Management Entity) during an Attach procedure, the Attach Request message including first information indicating that the communication terminal supports a dual connectivity with a master base station providing E-UTRA (Evolved UTRA (Universal Terrestrial Radio Access)) and a secondary base station providing 5G wireless communication method;
receive a RRC Connection Reconfiguration message from the master base station during a Secondary Node Addition procedure for operating the dual connectivity, the RRC Connection Reconfiguration message being received after the Attach procedure; and
receive an Attach Accept message from the MME during the Attach procedure, the Attach Accept message including second information indicating whether the usage of a dual connectivity with the 5G wireless communication method is restricted, wherein
the communication terminal configures the dual connectivity with the 5G wireless communication method in case where the second information indicates that the usage of the dual connectivity with the 5G wireless communication method is not restricted.