Patent ID: 11889387
Assignee: NEC CORPORATION
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 1:
2. A communication system comprising:
an AMF (Access and Mobility Management Function) apparatus configured to manage access and mobility related to a UE (User Equipment); and
a CBC (Cell Broadcast Centre) configured to distribute emergency information, wherein the CBC sends a Write-Replace Warning Request message to the AMF apparatus, and
wherein the AMF connects to a 3GPP (3rd Generation Partnership Project) access network and an N3IWF (Non-3GPP InterWorking Function) node apparatus, and
wherein in a case where the Write-Replace Warning Request message does not include a list of TAIs (Tracking Area Identities), the AMF apparatus forwards the Write-Replace Warning Request message to an NG-RAN (Next Generation Radio Access Network) node apparatus indicated by information identifying a node apparatus of the 3GPP access network without forwarding the Write-Replace Warning Request message to the N3IWF node apparatus.