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KR-20260064441-A - METHOD AND USER EQUIPMENT FOR STORING RADIO ACCESS TECHNOLOGY UTILIZATION CONTROL INFORMATION

KR20260064441AKR 20260064441 AKR20260064441 AKR 20260064441AKR-20260064441-A

Abstract

According to one example of the present specification, a method of operation of a User Equipment (UE) is presented. The method may include the step of transmitting an attach request message; and the step of receiving a response message. Where the response message is an attach accept message and the attach message includes Radio Access Technology (RAT) utilization control information, the RAT utilization control information may be for a current PLMN and an equivalent PLMN. The method may include the step of: where the response message is an attach reject message and the attach reject message includes the RAT utilization control information, and an integrity check for the attach reject message is successfully completed, storing the RAT utilization control information in a list of PLMNs with associated RAT restrictions together with the PLMN identity of the current PLMN.

Inventors

  • 유상근

Assignees

  • 주식회사 멘타츠

Dates

Publication Date
20260507
Application Date
20250317
Priority Date
20241030

Claims (9)

  1. In the method of operation of user equipment (UE), Step of sending an attach request message; Step of receiving a response message, Where the response message is an attach accept message and the attach message includes Radio Access Technology (RAT) utilization control information, the RAT utilization control information is for the current PLMN and an equivalent PLMN; and A method comprising the step of, if the above response message is an attach reject message, the above attach reject message includes the above RAT utilization control information, and if an integrity check for the above attach reject message is successfully completed, storing the above RAT utilization control information together with the current PLMN's PLMN identity in a list of PLMNs with associated RAT restrictions.
  2. In paragraph 1, A method comprising the additional step of replacing previously stored RAT utilization control information associated with the current PLMN with new RAT utilization control information.
  3. In paragraph 1, A method in which, if the above response message is an attach reject message, the attachment reject message includes information indicating that there are no suitable cells within the tracking area.
  4. In paragraph 1, A method further comprising the step of, if the above response message includes the RAT utilization control information, storing the RAT utilization control information together with the current PLMN's PLMN identity in a list of PLMNs with associated RAT restrictions.
  5. In paragraph 1, A method comprising the additional step of maintaining a saved list when the above UE is switched off so that it can be used even after being switched on.
  6. In paragraph 1, A method comprising the additional step of deleting the stored list when the USIM (Universal Subscriber Identity Module) is removed from the above UE.
  7. As UE (User Equipment), The transmitting and receiving unit; and It includes a processor that controls the above-mentioned transmitting and receiving unit to perform an operation, and The operation performed by the above processor is: Step of sending an attach request message; Step of receiving a response message, Where the response message is an attach accept message and the attach message includes Radio Access Technology (RAT) utilization control information, the RAT utilization control information is for the current PLMN and an equivalent PLMN; and A UE comprising the step of, if the above response message is an attach reject message, the above attachment reject message includes the above RAT utilization control information, and if an integrity check for the above attachment reject message is successfully completed, storing the above RAT utilization control information together with the current PLMN's PLMN identity in a list of PLMNs with associated RAT restrictions.
  8. As a chipset mounted on UE (User Equipment), At least one processor and; and The operation performed based on the instruction being executed by the at least one processor includes at least one memory that stores instructions and is operablely electrically connected to the at least one processor: Step of sending an attach request message; Step of receiving a response message, Where the response message is an attach accept message and the attach message includes Radio Access Technology (RAT) utilization control information, the RAT utilization control information is for the current PLMN and an equivalent PLMN; and A chipset comprising the step of storing the RAT utilization control information in a list of PLMNs with associated RAT restrictions, together with the PLMN identity of the current PLMN, when the above response message is an attach reject message and the above attach reject message includes the above RAT utilization control information, and when an integrity check for the above attach reject message is successfully completed.
  9. As a non-volatile computer-readable storage medium that records instructions, Includes commands, When the above instructions are executed by one or more processors mounted on the device, the one or more processors cause the above instructions to perform an operation: The above operation is: Step of sending an attach request message; Step of receiving a response message, Where the response message is an attach accept message and the attach message includes Radio Access Technology (RAT) utilization control information, the RAT utilization control information is for the current PLMN and an equivalent PLMN; and A storage medium comprising the step of storing the RAT utilization control information in a list of PLMNs with associated RAT restrictions, together with the PLMN identity of the current PLMN, when the above response message is an attach reject message and the above attachment reject message includes the above RAT utilization control information, and when an integrity check for the above attachment reject message is successfully completed.

Description

Method and User Equipment for Storing Radio Access Technology Utilization Control Information This specification relates to 3GPP wireless communication systems. 3GPP, which establishes technical specifications for mobile communication systems, began research on LTE/SAE (Long Term Evolution/System Architecture Evolution) technology around the end of 2004 as part of an effort to optimize and improve the performance of 3GPP technologies in order to respond to various forums and new technologies related to 4th generation mobile communication. The SAE, conducted under the leadership of 3GPP SA WG2, is a study on network technology aimed at determining network architecture and supporting mobility between heterogeneous networks in parallel with the LTE work of 3GPP TSG RAN, and is one of the important standardization issues of 3GPP in recent years. This work aims to develop the 3GPP system into an IP-based system that supports various wireless access technologies, and has been carried out with the goal of an optimized packet-based system that minimizes transmission delay with enhanced data transmission capabilities. The high-level reference model of the EPS (Evolved Packet System) defined by 3GPP SA WG2 includes non-roaming cases and roaming cases for various scenarios, and details can be found in 3GPP standard documents TS 23.401 and TS 23.402. The network structure diagram in Figure 1 is a simplified reconstruction of this. Figure 1 is a structural diagram of an advanced mobile communication network. The EPC (Evolved Packet Core) may include various components, and Figure 1 illustrates some of them, such as the S-GW (Serving Gateway) (52), PDN GW (Packet Data Network Gateway) (53), MME (Mobility Management Entity) (51), SGSN (Serving GPRS (General Packet Radio Service) Supporting Node), and ePDG (enhanced Packet Data Gateway). The S-GW (52) acts as a boundary point between the radio access network (RAN) and the core network and is an element that maintains the data path between the eNodeB (22) and the PDN GW (53). Additionally, when a terminal (or User Equipment: UE) moves across an area served by the eNodeB (22), the S-GW (52) acts as a local mobility anchor point. That is, packets can be routed through the S-GW (52) for mobility within the E-UTRAN (Evolved-UMTS (Universal Mobile Telecommunications System) Terrestrial Radio Access Network defined after 3GPP Release-8). In addition, the S-GW (52) may also function as an anchor point for mobility with other 3GPP networks (RANs defined before 3GPP Release-8, e.g., UTRAN or GERAN (GSM (Global System for Mobile Communication)/EDGE (Enhanced Data rates for Global Evolution) Radio Access Network)). The PDN GW (or P-GW) (53) corresponds to the termination point of the data interface toward the packet data network. The PDN GW (53) can support policy enforcement features, packet filtering, charging support, etc. Additionally, it can serve as an anchor point for mobility management between the 3GPP network and non-3GPP networks (e.g., untrusted networks such as I-WLAN (Interworking Wireless Local Area Network), trusted networks such as CDMA (Code Division Multiple Access) networks or WiMAX). In the example of the network structure in Fig. 1, the S-GW (52) and PDN GW (53) are configured as separate gateways, but the two gateways may be implemented according to the Single Gateway Configuration Option. The MME (51) is an element that performs signaling and control functions to support access to the UE's network connection, allocation of network resources, tracking, paging, roaming, and handover. The MME (51) controls control plane functions related to subscriber and session management. The MME (51) manages numerous eNodeBs (22) and performs signaling for the selection of a conventional gateway for handover to another 2G/3G network. Additionally, the MME (51) performs functions such as security procedures, terminal-to-network session handling, and idle terminal location management. The SGSN handles all packet data, such as user mobility management and authentication for other 3GPP access networks (e.g., GPRS networks, UTRAN/GERAN). ePDG acts as a security node for untrusted non-3GPP networks (e.g., I-WLAN, WiFi hotspots, etc.). As described with reference to FIG. 1, a terminal (or UE) having IP capability can access an IP service network (e.g., IMS) provided by a carrier (i.e., operator) via various elements within the EPC, whether through 3GPP access or non-3GPP access. In addition, Figure 1 illustrates various reference points (e.g., S1-U, S1-MME, etc.). In the 3GPP system, a reference point is defined as a conceptual link connecting two functions existing in different functional entities of E-UTRAN and EPC. Table 1 below summarizes the reference points illustrated in Figure 1. In addition to the examples in Table 1, various reference points may exist depending on the network structure. Reference pointexplanationS1-MMEReference point for control plane protocols between E-UT