Method and device using network slicing in mobile communication system
According to the disclosure, a communication method using a network slice by an access and mobility management function (AMF) comprises receiving one of subscribed single-network slice selection assistance information (S-NSSAI) or network slice selection policy (NSSP) information, requesting and receiving the other, non-received information of the subscribed S-NSSAI or the NSSP information, and transmitting a first message including the received subscribed S-NSSAI and the received NSSP information to a user equipment (UE).
1. A method of a user equipment (UE), the method comprising:
determining whether at least one single-network slice selection assistance information (S-NSSAI) in configured NSSAI stored in the UE is included in network slice selection policy (NSSP) information stored in the UE;
transmitting, to an access and mobility management function (AMF), a policy provisioning request message including the NSSP information in response to the at least one S-NSSAI in the configured NSSAI being not included in the NSSP information;
receiving, from the AMF, a response message including updated NSSP information as a response to the policy provisioning request message; and
updating a policy of the UE based on the updated NSSP information included in the response message,
wherein an update request message including the NSSP information is from the AMF to a policy control function (PCF) in response to the policy provisioning request message.
2. The method of claim 1 , wherein the updated NSSP information included in the response message is obtained from the PCF.
3. A user equipment (UE), the UE comprising:
a transceiver; and
at least one processor coupled with the transceiver, the at least one processor configured to:
determine whether at least one single-network slice selection assistance information (S-NSSAI) in configured NSSAI stored in the UE is included in network slice selection policy (NSSP) information stored in the UE;
transmit, to an access and mobility management function (AMF), a policy provisioning request message including the NSSP information in response to the at least one S-NSSAI in the configured NSSAI being not included in the NSSP information;
receive, from the AMF, a response message including updated NSSP information as a response to the policy provisioning request message; and
update a policy of the UE based on the updated NSSP information included in the response message,
wherein an update request message including the NSSP information is from the AMF to a policy control function (PCF) in response to the policy provisioning request message.
4. The UE of claim 3 , wherein the updated NSSP information included in the response message is obtained from the PCF.