Handling of temporary non access stratum parameters during registration procedure for the ue supporting to the network using 3gpp network access and non-3gpp network access

A method of a user equipment configured to perform a registration procedure with a same Access and mobility Management Function (AMF) via a 3rd Generation Partnership Project (3GPP) access and a non-3GPP access, the method comprising:

• performing a registration with the AMF via one access network among the 3GPP access and the non-3GPP access, separately from a registration via another access network that is different from the one access network;
• starting a timer (T3510) in a case where the registration via the one access network is performed;
• incrementing a number of times of registration attempt via the one access network in a case where the timer (T3510) expires;
• and
• keeping a 5G-Globally Unique Temporary Identity (5G-GUTI) that is assigned for the another access network, in a case where the number of times of the registration attempt via the one access network is equal to a maximum number, wherein
• the 5G-GUTI is common to both the 3GPP access and the non-3GPP access.

A user equipment configured to perform a registration procedure with a same Access and mobility Management Function (AMF) via a 3rd Generation Partnership Project (3GPP) access and a non-3GPP access, the user equipment comprising:

• a memory;
• and
• at least one hardware processor coupled to the memory,
• wherein the at least one hardware processor is configured to:
• perform a registration with the AMF via one access network among the 3GPP access and the non-3GPP access, separately from a registration via another access network that is different from the one access network;
• start a timer (T3510) in a case where the registration via the one access network is performed;
• increment a number of times of registration attempt via the one access network in a case where the timer (T3510) expires;
• and
• keep a 5G-Globally Unique Temporary Identity (5G-GUTI) that is assigned for the another access network, in a case where the number of times of the registration attempt via the one access network is equal to a maximum number,
• wherein the 5G-GUTI is common to both the 3GPP access and the non-3GPP access.