Handling of URSP regarding S-NSSAI and PDU type

A method of User Equipment (UE) Route Selection Policy (URSP) rule matching, comprising:

• receiving request from upper layers for protocol data unit (PDU) session information of the UE in a mobile communication network;
• selecting a URSP rule from one or more configured URSP rules, wherein a traffic descriptor of the selected URSP rule matches with an application;
• obtaining a PDU session that matches a route selection descriptor (RSD) from a list of RSDs of the selected URSP rule, wherein the PDU session is established with a set of requested parameters, wherein the UE has only one allowed S-NSSAI in an allowed NSSAI list, wherein the PDU session is established with the allowed S-NSSAI, and wherein the matched RSD has no S-NSSAI component;
• and
• associating the PDU session with the application and providing the PDU session information to the upper layers.

A method of User Equipment (UE) Route Selection Policy (URSP) rule matching, comprising:

• receiving a request from upper layers for protocol data unit (PDU) session information of the UE in a mobile communication network;
• selecting a URSP rule from one or more configured URSP rules, wherein a traffic descriptor of the selected URSP rule matches with an application;
• obtaining a PDU session that matches a route selection descriptor (RSD) from a list of RSDs of the selected URSP rule, wherein the RSD has a first PDU session type set to IPv4v6, and wherein the PDU session has a second PDU session type set to IPv4 in a PDU SESSION ESTABLISHMENT ACCEPT message from the network;
• and
• associating the PDU session with the application and providing the PDU session information to the upper layers, wherein the UE does not receive any 5G session management (5GSM) cause value, or the UE receives a 5GSM cause value other than IPv4 only allowed.