Support for vplmn ursp rules

A network node comprising:

• a processor configured to:
• determine a wireless transmit and receive unit (WTRU) is not configured to support route selection policy rules;
• receive a first message, the first message comprising service parameters associated with the WTRU, the service parameters applying if the WTRU is registered in a first visited public land mobile network (VPLMN) and the service parameters for use in generating route selection policy rules for the WTRU;
• on a condition that the WTRU is not configured to support route selection policy rules, send a second message, the second message indicating that the route selection policy rules are to be sent to the WTRU if the WTRU becomes registered in the first VPLMN;
• receive a third message from a network function;
• generate route selection policy rules applicable to the WTRU while the WTRU is located in the first VPLMN;
• and
• on a condition that the third message indicates the WTRU is registered in the first VPLMN, send a fourth message to the WTRU, the fourth message comprising the generated route selection policy rules for the WTRU while in the first VPLMN.

A method comprising:

• a computing system determining a wireless transmit and receive unit (WTRU) is not configured to support route selection policy rules;
• the computing system receiving a first message, the first message comprising service parameters associated with the WTRU, the service parameters applying if the WTRU is registered in a first visited public land mobile network (VPLMN) and the service parameters for use in generating route selection policy rules for the WTRU;
• the computing system, on a condition that the WTRU is not configured to support route selection policy rules, sending a second message, the second message indicating that the route selection policy rules are to be sent to the WTRU if the WTRU becomes registered in the first VPLMN;
• the computing system receiving a third message from a network function;
• the computing system generating route selection policy rules applicable to the WTRU while the WTRU is located in the first VPLMN;
• and
• the computing system, on a condition that the third message indicates the WTRU is registered in the first VPLMN, sending a fourth message to the WTRU, the fourth message comprising the generated route selection policy rules for the WTRU while in the first VPLMN.

A network node comprising:

• a processor configured to:
• receive a first message, the first message comprising service parameters associated with a wireless transmit and receive unit (WTRU), the service parameters applying if the WTRU is registered in a first visited public land mobile network (VPLMN) and the service parameters for use in generating route selection policy rules for the WTRU;
• on a condition that the WTRU is not configured to support route selection policy rules, send a second message, the second message indicating that the route selection policy rules are to be sent to the WTRU if the WTRU becomes registered in the first VPLMN;
• generate route selection policy rules applicable to the WTRU while the WTRU is located in the first VPLMN;
• and
• on a condition that the WTRU becomes registered in the first VPLMN, send a third message to the WTRU, the third message comprising the generated route selection policy rules for the WTRU while in the first VPLMN.