Method and apparatus for providing policy of user equipment in wireless communication system

1. An operating method of a visited-policy control function (V-PCF) of a visited public land mobile network (PLMN) providing a policy for processing traffic of a user equipment in a wireless communication system, the operating method comprising:

transmitting an indicator requesting transmission or allowance of transmission of a visited user equipment route selection policy (V-URSP) of the V-PCF to a home-policy control function (H-PCF) of a home PLMN;

receiving, from the H-PCF, an indicator indicating whether transmission of the V-URSP of the V-PCF is allowed;

receiving a home user equipment route selection policy (H-URSP) from the H-PCF; and

transmitting, to the user equipment via an access and mobility management function (AMF), a message including at least one of the H-URSP or the V-URSP, based on the indicator indicating whether the transmission of the V-URSP of the V-PCF is allowed.

2. The operating method of claim 1 , wherein the indicator requesting transmission or allowance of transmission of the V-URSP of the V-PCF is transmitted from the AMF to the V-PCF, based on an indicator allowing the transmission of the V-URSP of the V-PCF, and

the indicator allowing the transmission of the V-URSP of the V-PCF is transmitted to the AMF from unified data management (UDM) of the home PLMN.

3. The operating method of claim 1 , wherein the transmitting of the indicator requesting transmission or allowance of transmission of the V-URSP of the V-PCF to the H-PCF of the home PLMN comprises transmitting, to the H-PCF, an indicator requesting precedence of the V-URSP,

wherein the precedence of the V-URSP indicates that the V-URSP has a higher order of precedence than the H-URSP when a policy of the user equipment is selected.

4. The operating method of claim 1 , wherein the transmitting of the indicator requesting transmission or allowance of transmission of the V-URSP of the V-PCF to the H-PCF of the home PLMN is triggered by a message including the indicator requesting transmission or allowance of transmission of the V-URSP of the V-PCF transmitted from the AMF or a notification message transmitted from a visited unified data repository (V-UDR) of the visited PLMN.

5. An operating method of a home-policy control function (H-PCF) of a home public land mobile network (PLMN) providing a policy for processing traffic of a user equipment in a wireless communication system, the operating method comprising:

receiving, from a visited-PCF (V-PCF) of a visited PLMN, an indicator requesting transmission or allowance of transmission of a visited user equipment route selection policy (V-URSP) of the V-PCF;

determining, based on a pre-set criterion, whether to allow transmission of the V-URSP of the V-PCF;

transmitting, to the V-PCF, an indicator indicating whether the transmission of the V-URSP of the V-PCF is allowed, based on a result of the determining; and

transmitting a home-URSP (H-URSP) to the V-PCF.

6. The operating method of claim 5 , wherein the receiving, from the V-PCF of the visited PLMN, of the indicator requesting transmission or allowance of transmission of the V-URSP of the V-PCF comprises receiving, from the V-PCF, an indicator requesting precedence of the V-URSP,

wherein the precedence of the V-URSP indicates that the V-URSP has a higher order of precedence than the H-URSP when a policy of the user equipment is selected.

7. The operating method of claim 6 , further comprising determining whether to allow the precedence of the V-URSP, based on a policy of the home PLMN, subscription information of the user equipment, a roaming agreement between the home PLMN and the visited PLMN, or a service level agreement, in response to the receiving of the indicator requesting the precedence of the V-URSP,

wherein the transmitting, to the V-PCF, of the indicator indicating whether the transmission of the V-URSP of the V-PCF is allowed comprises transmitting, to the V-PCF, information about a result of the determining of whether to allow the precedence of the V-URSP.

8. The operating method of claim 7 , wherein the transmitting of the H-URSP to the V-PCF comprises transmitting, to the V-PCF, an indicator regarding the precedence of the V-URSP, based on the determination that the precedence of the V-URSP is allowed.

9. An operating method of a user equipment for providing a policy for processing traffic of the user equipment in a wireless communication system, the operating method comprising:

receiving a message including at least one of home user equipment route selection policy (H-URSP) or a visited-URSP (V-URSP) from a visited-policy control function (V-PCF) of a visited public land mobile network (PLMN) via a mobility management function (AMF);

checking whether the message comprises an indicator regarding precedence of the V-URSP; and

selecting a policy of the user equipment based on a result of the checking,

wherein the precedence of the V-URSP indicates that the V-URSP has a higher order of precedence than the H-URSP when a policy of the user equipment is selected.

10. The operating method of claim 9 , further comprising:

checking whether PLMN identification (ID) included in the message is home PLMN ID or visited PLMN ID, based on information about the home PLMN ID pre-set in the user equipment; and

identifying whether a network where the user equipment is registered is a visited network or a home network, based on a result of the checking.

11. The operating method of claim 9 , further comprising:

checking an indicator regarding the V-URSP included in the message; and

identifying a URSP included in the message as the V-URSP, based on the checking of the indicator regarding the V-URSP.

12. The operating method of claim 9 , wherein the selecting of the policy of the user equipment based on the result of the checking comprises:

selecting the policy of the user equipment based on the H-URSP, when the message does not include the indicator regarding the precedence of the V-URSP; and

selecting the policy of the user equipment based on the V-URSP when the message includes the indicator regarding the precedence of the V-URSP.

13. The operating method of claim 9 , further comprising detecting new traffic,

wherein the selecting of the policy of the user equipment based on the result of the verifying comprises:

checking whether the H-URSP corresponds to the new traffic when the message does not include the indicator regarding the precedence of the V-URSP; and

checking whether the V-URSP corresponds to the new traffic based on a result of checking whether the H-URSP corresponds to the new traffic.

14. The operating method of claim 9 , further comprising detecting new traffic,

wherein the selecting of the policy of the user equipment based on the result of the checking comprises:

checking whether the V-URSP corresponds to the new traffic when the message includes the indicator regarding the precedence of the V-URSP; and

checking whether the H-URSP corresponds to the new traffic based on a result of checking whether the V-URSP corresponds to the new traffic.

15. The operating method of claim 9 , wherein the selecting of the policy of the user equipment based on the result of the checking comprises, when precedence is set for each of the H-URSP and the V-URSP:

assigning an order of precedence of the V-URSP and the H-URSP, based on the indicator regarding precedence of the V-URSP; and

selecting the policy of the user equipment based on the order of precedence.