Method and user equipment for enhancing network slicing
Provided are procedures for initial UE registration and periodic or movement-based registration, and a communication unit to achieve management of the maximum number of UEs connected to each slice in 5GS. Furthermore, a method for managing a timer running after completion of the registration procedure, and a method of registration procedure and a communication unit for both a UE in which the timer is running and a UE in which the timer is not running are provided, thus providing a communication unit to implement functions related to the management of the maximum number of UEs connected to each slice in 5GS.
1. A User Equipment (UE) comprising:
transmission and reception circuitry;
control circuitry; and
a storage,
wherein
the transmission and reception circuitry are configured to:
send a registration request message including requested Network Slice Selection Assistance Information (NSSAI) including a Single Network Slice Selection Assistance Information (S-NSSAI); and
receive a registration accept message including the S-NSSAI, a cause value indicating that the S-NSSAI is not available due to maximum number of UEs reached, and a back-off timer value, and
the control circuitry is configured to:
add the S-NSSAI in a rejected NSSAI regarding the S-NSSAI for which the maximum number of UEs has been reached in the storage;
start a timer with the back-off timer value; and
remove the S-NSSAI from the rejected NSSAI regarding the S-NSSAI for which the maximum number of UEs has been reached when the timer expires, and
the rejected NSSAI regarding the S-NSSAI for which the maximum number of UEs has been reached is information for each access type.
2. A communication method performed by a User Equipment (UE), the communication method comprising:
sending a registration request message including requested Network Slice Selection Assistance Information (NSSAI) including a Single Network Slice Selection Assistance Information (S-NSSAI);
receiving a registration accept message including the S-NSSAI, a cause value indicating that the S-NSSAI is not available due to maximum number of UEs reached, and a back-off timer value;
adding the S-NSSAI in a rejected NSSAI regarding the S-NSSAI for which the maximum number of UEs has been reached in the UE;
starting a timer with the back-off timer value; and
removing the S-NSSAI from the rejected NSSAI regarding the S-NSSAI for which the maximum number of UEs has been reached when the timer expires,
wherein
the rejected NSSAI regarding the S-NSSAI for which the maximum number of UEs has been reached is information for each access type.