Patent ID: 11864149
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 3:
4. A method for registering a user equipment (UE), the method comprising:
the UE transmitting towards a signal handling function (SHF) a request message to register the UE, the request message including a registration type Information Element (IE) indicating that either i) the request message is for an initial registration if it is determined that the UE is not in a registered state or ii) the request message is not for an initial registration if it is determined that the UE is in a registered state; and
receiving a registration accept message transmitted by the SHF after the first SHF processes the request message, wherein
the request message transmitted by the UE towards the SHF further comprises:
i) an identifier allocated to the UE, wherein the identifier is a permanent identifier (PID), and
ii) a message type identifier separate from the registration type IE wherein the message type identifier identifies the request message as a registration request message

the registration accept message comprises a globally unique temporary identifier (GUTI) allocated to the UE, and
the method further comprises:
the UE transmitting, in response to the registration accept message, a registration complete message to acknowledge the GUTI that has been allocated.