Method for steering traffic in wireless communication system and device using same
A method for steering traffic performed by a terminal in a wireless communication system and a terminal using the method are provided. The method is characterized by: receiving first system information including a PLMN-ID list on which identities (ID) of a public land mobile network (PLMN) are listed according to a specific order; receiving second system information including RAN auxiliary information related to steering traffic between a first network and a second network; and steering traffic between the first and the second networks based on the first and second system information, wherein the second system information provides RAN auxiliary information for each PLMN, includes the same number of pieces of RAN auxiliary information as the number of PLMNs on the PLMN-ID list, and includes the RAN auxiliary information in the same order as the specific order of the PLMNs on the PLMN-ID list.
1. A method of steering traffic by a User Equipment (UE) in a wireless communication system, the method comprising:
receiving first system information comprising a public land mobile network identity (PLMN-ID) list in which identities of a PLMN are listed in specific order;
receiving second system information comprising entries, each entry being information about traffic steering between a first network and a second network; and
steering traffic between the first network and the second network based on the first system information and the second system information,
wherein the second system information provides the information about traffic steering between the first network and the second network per PLMN,
wherein the second system information comprises a number of entries equal to the PLMNs included in the PLMN-ID list, and
wherein the second system information comprises the entries in the same order as the specific order of PLMNs included in the PLMN-ID list.
2. The method of claim 1 , wherein the first system information comprises information relevant when the UE evaluates whether the UE is allowed to access a cell.
3. The method of claim 1 , wherein when the PLMN-ID list includes N PLMN IDs in specific order, the second system information includes N entries in the same order as the specific order of PLMN IDs included in the PLMN-ID list, and wherein N is a natural number equal to or greater than 2.
4. The method of claim 1 , wherein a PLMN ID firstly listed in the PLMN-ID list is an ID of a primary PLMN.
5. The method of claim 1 , wherein the first network is an Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), and the second network is a Wireless Local Area Network (WLAN).
6. A user equipment (UE) that operates in a wireless communication system, the UE comprising:
a Radio Frequency (RF) unit that transmits and receives a wireless signal; and
a processor, functionally coupled to the RF unit, that:
controls the RF unit to receive first system information comprising a public land mobile network identity (PMMN-ID) list in which identities of a PLMN are listed in specific order,
controls the RF unit to receive second system information comprising entries, each entry being information about traffic steering between a first network and a second network, and
steers traffic between the first network and the second network based on the first system information and the second system information,
wherein the second system information provides the information about traffic steering between the first network and the second network per PLMN,
wherein the second system information comprises a number of entries equal to the PLMNs included in the PLMN-ID list, and
wherein the second system information comprises the entries in the same order as the specific order of PLMNs included in the PLMN-ID list.
7. The UE of claim 6 , wherein the first system information comprises information relevant when the UE evaluates whether the UE is allowed to access a cell.
8. The UE of claim 6 , wherein when the PLMN-ID list includes N PLMN IDs in specific order, the second system information includes N entries in the same order as the specific order of PLMN IDs included in the PLMN-ID list, wherein N is a natural number equal to or greater than 2.
9. The UE of claim 6 , wherein a PLMN ID firstly listed in the PLMN-ID list is an ID of a primary PLMN.
10. The UE of claim 6 , wherein the first network is an Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), and the second network is a Wireless Local Area Network (WLAN).