Techniques to restrict radio access technology utilization of serving public land mobile network
The described methods for managing UE RAT utilization through capability negotiation and network-provided restrictions address inefficiencies in existing systems, reducing signaling loads and outages by ensuring controlled access to radio technologies, thereby improving network performance.
Patent Information
- Application Number
- PCT/CN2024/105423
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-15
- Publication Date
- 2025-11-06
AI Technical Summary
Current mechanisms for restricting UE Radio Access Technology (RAT) utilization result in higher signaling loads and service outages due to UE re-attempts on the same PLMN/RAT, necessitating improved methods to manage RAT utilization proactively.
Implementing methods for capability negotiation between UE and network, providing RAT utilization restriction information to UE, and defining corresponding UE behavior, including support for 5G and EPS architectures, to manage RAT access effectively.
Reduces signaling loads and minimizes service outages by enabling controlled RAT utilization, allowing UEs to adhere to network-imposed restrictions on access technology, enhancing network efficiency and user experience.
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Figure CN2024105423_06112025_PF_FP_ABST
Abstract
Description
TECHNIQUES TO RESTRICT RADIO ACCESS TECHNOLOGY UTILIZATION OF SERVING PUBLIC LAND MOBILE NETWORKTECHNICAL FIELD
[0001] This document is directed generally to digital wireless communications.BACKGROUND
[0002] Mobile telecommunication technologies are moving the world toward an increasingly connected and networked society. In comparison with the existing wireless networks, next generation systems and wireless communication techniques will need to support a much wider range of use-case characteristics and provide a more complex and sophisticated range of access requirements and flexibilities.
[0003] Long-Term Evolution (LTE) is a standard for wireless communication for mobile devices and data terminals developed by 3rd Generation Partnership Project (3GPP) . LTE Advanced (LTE-A) is a wireless communication standard that enhances the LTE standard. The 5th generation of wireless system, known as 5G, advances the LTE and LTE-Awireless standards and is committed to supporting higher data-rates, large number of connections, ultra-low latency, high reliability and other emerging business needs.SUMMARY
[0004] Techniques are disclosed for supporting restriction of radio access technology (RAT) utilization.
[0005] A first example wireless communication method includes sending, by a communication device to a device comprising a mobility management function, a request that includes an indication that the communication device supports radio access technology (RAT) utilization restriction information; and receiving, by the communication device from the device, the RAT utilization restriction information.
[0006] In some embodiments, the RAT utilization restriction information includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs. In some embodiments, the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMNs) . In some embodiments, the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN. In some embodiments, the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.
[0007] In some embodiments, the RAT utilization restriction information is included in any one or more of the following messages: a registration accept message, an attach accept message, a tracking area updating (TAU) accept message, a registration reject message, an attach reject message, or a TAU reject message. In some embodiments, the communication device receives another indication that acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device. In some embodiments, the method further comprises performing, by the communication device, an operation in response to receiving the RAT utilization restriction information, where the operation comprises any one or more of: storing the RAT utilization restriction information, replacing a stored RAT utilization restriction information for a serving public land mobile network (PLMN) with the RAT utilization restriction information that is received, replacing the stored RAT utilization restriction information for each equivalent PLMN with the RAT utilization restriction information that is received, indicating the RAT utilization restriction information to an access stratum (AS) for cell selection and / or cell reselection, refraining from utilizing one or more restricted RATs for the cell selection and / or the cell reselection as indicated by the RAT utilization restriction information, and / or utilizing one or more supported or recommended RATs for the cell selection and / or the cell reselection as indicated by the RAT utilization restriction information.
[0008] In some embodiments, the method further comprises transmitting, by the communication device to the mobility management function, an acknowledgement of successful reception of the RAT utilization restriction information. In some embodiments, the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .
[0009] A second example wireless communication method includes receiving, by a device comprising a mobility management function, a request that includes an indication that a communication device supports radio access technology (RAT) utilization restriction information; and transmitting, by the device to the communication device, the RAT utilization restriction information.
[0010] In some embodiments, the RAT utilization restriction information includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs. In some embodiments, the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMNs) . In some embodiments, the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN. In some embodiments, the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list. In some embodiments, the RAT utilization restriction information is included in any one or more of the following messages: a registration accept message, an attach accept message, a tracking area updating (TAU) accept message, a registration reject message, an attach reject message, or a TAU reject message.
[0011] In some embodiments, the device sends another indication that acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device. In some embodiments, the method further comprises sending, by the device to a second device comprising a subscription management function, any one or more of the following: the indication that the communication device supports RAT utilization restriction information, another indication that the mobility management function supports a RAT utilization restriction functionality, and / or a list of equivalent public land mobile network (PLMN) . In some embodiments, the device receives the RAT utilization restriction information from a second device comprising a subscription management function or a policy control function prior to transmitting the RAT utilization restriction information to the communication device. In some embodiments, the device modifies the RAT utilization restriction information received from the second device prior to transmitting the RAT utilization restriction information to the communication device. In some embodiments, the device receives from the second device another indication that an acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device.
[0012] In some embodiments, the RAT utilization restriction information is determined based on a local configuration of the device. In some embodiments, the local configuration includes a home public land mobile network (HPLMN) identifier (ID) of the communication device derived from an international mobile subscriber identity (IMSI) . In some embodiments, the method further comprises receiving, by the device from the communication device, an indication of an acknowledgement that the communication device has received the RAT utilization restriction information. In some embodiments, the method further comprises transmitting, by the device to a second device comprising a subscription management function, another indication of an acknowledgement that the communication device has received the RAT utilization restriction information. In some embodiments, the subscription management function includes a home subscriber server (HSS) or a unified data management (UDM) . In some embodiments, the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .
[0013] A third example wireless communication method includes receiving, by a second device comprising a subscription management function from a device comprising a mobility management function, an indication that a communication device supports RAT utilization restriction information; and transmitting, by the second device to the device, the RAT utilization restriction information.
[0014] In some embodiments, a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs. In some embodiments, the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMN) . In some embodiments, the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN. In some embodiments, the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.
[0015] In some embodiments, the method further comprises transmitting, by the second device to the device, another indication that an acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device. In some embodiments, the method further comprises receiving, by the second device from the device, a message that indicates that the mobility management function subscribes to be notified when the RAT utilization restriction information is modified. In some embodiments, the method further comprises receiving, by the second device from the device, another indication of an acknowledgement of successful reception of the RAT utilization restriction information by the communication device. In some embodiments, the subscription management function includes a home subscriber server (HSS) or a unified data management (UDM) . In some embodiments, the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .
[0016] In yet another exemplary aspect, the above-described methods are embodied in the form of processor-executable code and stored in a non-transitory computer-readable storage medium. The code included in the computer readable storage medium when executed by a processor, causes the processor to implement the methods described in this patent document.
[0017] In yet another exemplary embodiment, a device that is configured or operable to perform the above-described methods is disclosed.
[0018] The above and other aspects and their implementations are described in greater detail in the drawings, the descriptions, and the claims.
[0019] BRIEF DESCRIPTION OF THE DRAWING
[0020] FIG. 1 shows an example 5G System (5GS) architecture.
[0021] FIG. 2 shows an example Evolved Packet System (EPS) architecture.
[0022] FIG. 3 shows an example flowchart for RAT utilization restriction information provision during registration procedure in 5GS.
[0023] FIG. 4 shows an example flowchart for RAT utilization restriction information provision during initial attach procedure or tracking area updating (TAU) procedure in EPS.
[0024] FIG. 5 shows an exemplary block diagram of a hardware platform that may be a part of a network device or a communication device.
[0025] FIG. 6 shows an example of wireless communication including a base station (BS) and user equipment (UE) based on some implementations of the disclosed technology.
[0026] FIG. 7 shows an exemplary flowchart for receiving radio access technology (RAT) utilization restriction information.
[0027] FIG. 8 shows an exemplary flowchart for transmitting radio access technology (RAT) utilization restriction information.
[0028] FIG. 9 shows another exemplary flowchart for transmitting radio access technology (RAT) utilization restriction information.DETAILED DESCRIPTION
[0029] In 3GPP release 19, a new work item is approved to specify how to control UE Radio Access Technology (RAT) utilization proactively. Because current mechanism to limit UE utilization of certain RAT employed by network operators involves rejecting the UE’s attach / Tracking Area Updating (TAU) request or the registration request with cause value #15 ‘no suitable cells in tracking area’ extended with value ‘E-UTRAN not allowed’ or #27 ‘N1 mode not allowed’ upon UE attempts to attach / register via a specific RAT. However, this existing mechanism resulted in e.g., higher signaling loads within the network, service outage until the UE selects another RAT, and UE keeping re-attempting on the same public land mobile network (PLMN) / RAT upon the UE re-enabling the corresponding RAT. Therefore, methods to support restriction of RAT utilization of serving PLMN by UE are required.
[0030] The example headings for the various sections below are used to facilitate the understanding of the disclosed subject matter and do not limit the scope of the claimed subject matter in any way. Accordingly, one or more features of one example section can be combined with one or more features of another example section. Furthermore, 5G terminology is used for the sake of clarity of explanation, but the techniques disclosed in the present document are not limited to 5G technology only, and may be used in wireless systems that implemented other protocols.
[0031] I. Introduction
[0032] FIG. 1 shows an example 5G System (5GS) architecture. The 5GS architecture consists of the following network functions (NFs) :
[0033] ● UE -User Equipment.
[0034] ● RAN -Radio Access Network.
[0035] ● AMF -Access and Mobility Management Function: This NF includes functionalities such as UE Mobility Management, Reachability Management, Connection Management and Registration Management. The AMF terminates the RAN control plane (CP) interface N2 and NAS interface N1, NAS ciphering and integrity protection. It also distributes the SM NAS to the proper SMFs via N11 interface.
[0036] ● UDM -Unified Data Management: This NF manages the subscription profile for the UEs. The subscription data is stored in the Unified Data Repository (UDR) . The subscription information includes the data used for Mobility Management and Session Management. The AMF and SMF retrieve the subscription data from the UDM.
[0037] ● SMF -Session Management Function: This NF includes the following functionalities: session establishment, modification and release, UE IP address allocation &management, selection and control of user plane (UP) function, etc.
[0038] ● UPF -User Plane Function: This NF serves as an anchor point for intra- / inter-radio access technology (RAT) mobility and as the external PDU session point of interconnect to Data Network (DN) . The UPF also routes and forwards the data packet according to the indication from the SMF. It also buffers the downlink (DL) data when the UE is in idle mode.
[0039] FIG. 2 shows an example Evolved Packet System (EPS) architecture that includes the following:
[0040] ● Home Subscriber Server (HSS) : The permanent storage location for subscriber data, located in the home network where the user is subscribed.
[0041] ● Mobility Management Entity (MME) : The storage location for subscriber data in the current network, responsible for managing the Non-Access Stratum (NAS) signaling between the terminal and network, tracking and paging management for idle mode users, and bearer management.
[0042] ● Serving Gateway (S-GW) : The gateway between the core network and the radio system, responsible for user plane data between the terminal and core network, data buffering for idle mode terminals, network-initiated service requests, lawful interception, and packet data routing and forwarding.
[0043] ● PDN Gateway (P-GW) : The gateway between the EPS and external packet data networks, responsible for IP address allocation for terminals, charging functions, packet filtering, policy enforcement, etc.
[0044] ● Serving GPRS Support Node (SGSN) : The support node for GERAN and UTRAN users to access the EPC network, with functions similar to the MME, handling location updates, paging management, and bearer management.
[0045] ● Policy and Charging Rules Function (PCRF) : Provides policy control and charging rules to the Policy and Charging Enforcement Function (PCEF) .
[0046] II. Example Embodiments
[0047] This patent document provides example methods to support restriction of RAT utilization including but not limited to:
[0048] 1) capability negotiation between UE and network;
[0049] 2) provide RAT utilization restriction information of serving PLMN and equivalent PLMN (s) to UE by network; and
[0050] 3) corresponding UE behavior after UE receives RAT utilization restriction information.
[0051] In some embodiments, when a UE receives RAT utilization restriction information, the UE can be instructed to restrict access to or communicating with a wireless communication system (e.g., 4G or 5G systems) . An operator can change or indicate restriction information in the RAT utilization restriction information. An equivalent PLMN is a PLMN that is considered equivalent to a current serving PLMN for a UE. The examples given below are based on EPS and 5GS procedures. However, the proposed methods are not limited to EPS and 5GS and can be used also in 2G System, 3G System, 6G System and beyond.
[0052] II. (a) . Example 1: RAT utilization restriction information provision during Registration procedure in 5GS FIG. 3 shows an example flowchart for RAT utilization restriction information provision during registration procedure in 5GS. The numbers associated with the operations shown below correspond to the numbers shown in FIG. 3.
[0053] 1. UE to AMF: The UE initiates the registration procedure for initial registration or the registration procedure for mobility and periodic registration update by sending a REGISTRATION REQUEST message to the AMF. AMF is the Mobility Management Element in 5GS.
[0054] If the UE supports Radio Access Technology (RAT) utilization restriction information, e.g., information used by UE for restriction on utilization of certain RAT (s) , the UE includes an indication that the UE supports RAT utilization restriction information in the REGISTRATION REQUEST message. The indication may be included in 5GMM Capability information element (IE) of the REGISTRATION REQUEST message.
[0055] 2. AMF->UDM: The AMF registers with UDM using Nudm_UEContextManagement_Registration (Nudm _UECM_Registration) service operation. UDM is the Subscription Management Element in 5GS.
[0056] If the UE includes indication that the UE supports RAT utilization restriction information in the REGISTRATION REQUEST message, or if the indication is changed, the AMF may provide the RAT utilization restriction information support indication which indicates whether the UE supports RAT utilization restriction information to UDM. The indication may be included in Amf3GppAccessRegistration data or Amf3GppAccessRegistrationModification data of Nudm_UECM_Registration message.
[0057] AMF may indicate AMF’s support for RAT utilization restriction functionality. AMF may provide equivalent PLMN list to UDM.
[0058] 3. AMF->UDM: After AMF has successfully completed the registration service operation with UDM and if the AMF does not have subscription data for the UE, the AMF retrieves subscription data by sending Nudm_Subscriber DataManagement_Get (Nudm_SDM_Get) request message to UDM.
[0059] If the UE includes indication that the UE supports RAT utilization restriction information in the REGISTRATION REQUEST message, or if the indication is changed, the AMF may provide the RAT utilization restriction information support indication which indicates whether the UE supports RAT utilization restriction information to UDM in Nudm_SDM_Get request message.
[0060] AMF may indicate AMF’s support for RAT utilization restriction functionality. AMF may provide equivalent PLMN list to UDM.
[0061] 4. UDM->AMF: UDM may retrieve subscription data from UDR by using Nudr_DM_Query service operation. The UDM sends Nudm_SDM_Get response message to AMF including subscription data (which is retrieved from UDR if UDM retrieved subscription data from UDR) .
[0062] In one example, if the UDM received indication that UE supports RAT utilization restriction information and / or AMF supports RAT utilization restriction functionality, the UDM includes RAT utilization restriction information in the response message to AMF. In another example, the UDM includes RAT utilization restriction information in the response message to AMF if the RAT utilization restriction information is available. The RAT utilization restriction information may be included in AccessAndMobilitySubscriptionData of the response message.
[0063] The RAT utilization restriction information includes one or more of the following:
[0064] 1) list of restricted RAT (s) for the serving PLMN;
[0065] 2) list (s) of restricted RAT (s) for equivalent PLMN (s) ;
[0066] 3) list of restricted RAT Type (s) for the serving PLMN;
[0067] 4) list (s) of restricted RAT Type (s) for equivalent PLMN (s) ,
[0068] 5) list of supported or recommended RAT (s) for the serving PLMN;
[0069] 6) list (s) of supported or recommended RAT (s) for equivalent PLMN (s) ;
[0070] 7) list of supported or recommended RAT Type (s) for the serving PLMN;
[0071] 8) list (s) of supported or recommended RAT Type (s) for equivalent PLMN (s) ,
[0072] where RAT (s) includes e.g., NR and / or E-UTRA and / or UTRA and / or GSM, RAT Type (s) includes e.g., NR, NB-IoT, LTE-M, NR_REDCAP, NR_LEO, NB_IoT_LEO and etc. The RAT utilization restriction information may also include an applicability indication to indicate that whether restriction on the utilization of RAT applies within the current registered PLMN (the PLMN to which the UE is currently registered) or whether restriction on the utilization of RAT applies to any tracking area of a TAI list and the UDM may provide a TAI list.
[0073] UDM may indicate that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested.
[0074] 5. AMF->UDM: After a successful response is received, the AMF subscribes to be notified using Nudm_SDM_Subscribe service operation when the data requested is modified, e.g., when the RAT utilization restriction information is modified. UDM may subscribe to UDR by Nudr_DM_Subscribe.
[0075] 6. AMF->UE: In one example, if the AMF receives RAT utilization restriction information from UDM, the AMF provides to the UE the received RAT utilization restriction information. AMF also indicates that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested if received from UDM. In roaming scenarios, the AMF may modify the RAT utilization restriction information received from UDM and then send the modified RAT utilization restriction information to UE.
[0076] In another example, if the UE indicated that the UE supports RAT utilization restriction information and RAT utilization restriction information is available based on local configuration e.g. the AMF determines RAT utilization restriction information for the UE based on HPLMN ID of the UE e.g. derived from IMSI, or based on current TA etc, the AMF may provide RAT utilization restriction information to UE. In another example, RAT utilization restriction information is available based on local configuration e.g. the AMF determines RAT utilization restriction information for the UE based on HPLMN ID of the UE e.g. derived from IMSI, or based on current TA etc., the AMF may provide RAT utilization restriction information to UE.
[0077] In another example, the AMF may receive RAT utilization restriction information from PCF and the AMF sends RAT utilization restriction information received from PCF to UE.
[0078] The RAT utilization restriction information includes one or more of the following:
[0079] 1) list of restricted RAT (s) for the serving PLMN;
[0080] 2) list (s) of restricted RAT (s) for equivalent PLMN (s) ;
[0081] 3) list of restricted RAT Type (s) for the serving PLMN;
[0082] 4) list (s) of restricted RAT Type (s) for equivalent PLMN (s) ;
[0083] 5) list of supported or recommended RAT (s) for the serving PLMN;
[0084] 6) list (s) of supported or recommended RAT (s) for equivalent PLMN (s) ;
[0085] 7) list of supported or recommended RAT Type (s) for the serving PLMN;
[0086] 8) list (s) of supported or recommended RAT Type (s) for equivalent PLMN (s) ;
[0087] 9) an applicability indication to indicate that whether restriction on the utilization of RAT applies within the current registered PLMN or restriction on the utilization of RAT applies to any tracking area of a TAI list and the AMF may provide a TAI list, if the AMF doesn’ t provide a TAI list then the TAI list refers to Registration Area, where RAT (s) includes e.g. NR and / or E-UTRA and / or UTRA and / or GSM, RAT Type (s) includes e.g. NR, NB-IoT, LTE-M, NR_REDCAP, NR_LEO, NB_IoT_LEO and etc.
[0088] If the registration request message is accepted, the RAT utilization restriction information is included in the registration accept message sent by AMF to UE. AMF may also indicate that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested.
[0089] If the registration request message is rejected, the RAT utilization restriction information is included in the registration reject message sent by AMF to UE.
[0090] 7. UE: The UE performs any one or more of the following operations: (1) the UE stores the RAT utilization restriction information if received; (2) the UE replaces the stored RAT utilization restriction information for the serving PLMN with the received information; (3) the UE replaces the stored RAT utilization restriction information for each equivalent PLMN with the received information; (4) the UE indicates the RAT utilization restriction information to the access stratum (AS) for cell selection and cell reselection purpose; (5) UE refrains from utilizing the restricted RAT (s) for cell selection and cell reselection as per indicated by RAT utilization restriction information; and / or (6) UE uses supported or recommended RAT (s) for cell selection and cell reselection as per indicated by RAT utilization restriction information.
[0091] 8. UE->AMF: In one example, if UE receives registration accept message including RAT utilization restriction information and UE receives indicate that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested, UE sends registration complete message to AMF to acknowledge the successful reception of the RAT utilization restriction information.
[0092] In another example, if the UE receives registration accept message including RAT utilization restriction information, the UE sends registration complete message to AMF to acknowledge the successful reception of the RAT utilization restriction information.
[0093] 9. AMF->UDM: If the AMF receives UE acknowledgement of successful reception of the RAT utilization restriction information and the AMF received the request from UDM, the AMF provides the UE acknowledgement of successful reception of the RAT utilization restriction information to UDM.
[0094] II. (b) . Example 2: RAT utilization restriction information provision during initial attach procedure or TAU procedure in EPS
[0095] FIG. 4 shows an example flowchart for RAT utilization restriction information provision during initial attach procedure or TAU procedure in EPS. The numbers associated with the operations shown below correspond to the numbers shown in FIG. 4.
[0096] 1. UE->MME: The UE initiates the attach procedure by sending ATTACH REQUEST message to MME or initiates the tracking area updating procedure by sending TRACKING AREA UPDATE REQUEST message to MME. MME is the Mobility Management Element in EPS.
[0097] If the UE supports RAT utilization restriction information, e.g., information used by UE for restriction on utilization of certain RAT (s) , the UE includes an indication that the UE supports RAT utilization restriction information in the ATTACH REQUEST message or the TRACKING AREA UPDATE REQUEST message. The indication may be included in UE network capability IE of the ATTACH REQUEST message or the TRACKING AREA UPDATE REQUEST message.
[0098] 2. MME -> HSS: The MME sends an Update Location Request message to HSS e.g., if there is no valid subscription context for the UE in the MME. HSS is the Subscription Management Element in EPS.
[0099] If the UE includes indication that the UE supports RAT utilization restriction information in the ATTACH REQUEST message or the TRACKING AREA UPDATE REQUEST message, or if the indication is changed, the MME may provide the RAT utilization restriction information support indication which indicates whether the UE supports RAT utilization restriction information to HSS.
[0100] MME may indicate MME’s support for RAT utilization restriction functionality. MME may provide equivalent PLMN list to HSS.
[0101] 3. HSS-> MME: The HSS acknowledges the Update Location Request message by sending an Update Location Ack message including subscription data to the MME.
[0102] In one example, if the HSS received indication that UE supports RAT utilization restriction information and / or MME supports RAT utilization restriction functionality, the HSS includes RAT utilization restriction information in the response message to MME. In another example, the HSS includes RAT utilization restriction information in the response message to MME if the RAT utilization restriction information is available.
[0103] The RAT utilization restriction information includes one or more of the following:
[0104] 1) list of restricted RAT (s) for the serving PLMN;
[0105] 2) list (s) of restricted RAT (s) for equivalent PLMN (s) ;
[0106] 3) list of restricted RAT Type (s) for the serving PLMN;
[0107] 4) list (s) of restricted RAT Type (s) for equivalent PLMN (s) ;
[0108] 5) list of supported or recommended RAT (s) for the serving PLMN;
[0109] 6) list (s) of supported or recommended RAT (s) for equivalent PLMN (s) ;
[0110] 7) list of supported or recommended RAT Type (s) for the serving PLMN;
[0111] 8) list (s) of supported or recommended RAT Type (s) for equivalent PLMN (s) ;
[0112] 9) an applicability indication to indicate that whether restriction on the utilization of RAT applies within the current registered PLMN or restriction on the utilization of RAT applies to any tracking area of a TAI list and the HSS may provide a TAI list,
[0113] where RAT (s) includes e.g., NR and / or E-UTRA and / or UTRA and / or GSM, RAT Type (s) includes e.g., NR, NB-IoT, LTE-M, NR_REDCAP, NR_LEO, NB_IoT_LEO and etc.
[0114] HSS may indicate that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested.
[0115] 4. MME->UE: In one example, if the MME receives RAT utilization restriction information from HSS, the MME provides the received RAT utilization restriction information to UE. MME also indicates that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested if received from HSS. In roaming scenarios, the MME may modify the RAT utilization restriction information received from HSS and then send the modified RAT utilization restriction information to UE.
[0116] In another example, if the UE indicated that the UE supports RAT utilization restriction information and RAT utilization restriction information is available based on local configuration, e.g. the MME determines RAT utilization restriction information for the UE based on HPLMN ID of the UE e.g. derived from IMSI, or based on current TA etc, the MME may provide RAT utilization restriction information to UE. In another example, RAT utilization restriction information is available based on local configuration e.g. the MME determines RAT utilization restriction information for the UE based on HPLMN ID of the UE e.g. derived from IMSI, or based on current TA etc, the MME may provide RAT utilization restriction information to UE.
[0117] In another example, the MME may receive RAT utilization restriction information from PCRF and the AMF sends RAT utilization restriction information received from PCRF to UE.
[0118] The RAT utilization restriction information includes one or more of the following:
[0119] 1) list of restricted RAT (s) for the serving PLMN;
[0120] 2) list (s) of restricted RAT (s) for equivalent PLMN (s) ;
[0121] 3) list of restricted RAT Type (s) for the serving PLMN;
[0122] 4) list (s) of restricted RAT Type (s) for equivalent PLMN (s) ;
[0123] 5) list of supported or recommended RAT (s) for the serving PLMN;
[0124] 6) list (s) of supported or recommended RAT (s) for equivalent PLMN (s) ;
[0125] 7) list of supported or recommended RAT Type (s) for the serving PLMN;
[0126] 8) list (s) of supported or recommended RAT Type (s) for equivalent PLMN (s) ;
[0127] 9) an applicability indication to indicate that whether restriction on the utilization of RAT applies within the current registered PLMN or restriction on the utilization of RAT applies to any tracking area of a TAI list and the MME may provide a TAI list. If the MME doesn’ t provide a TAI list, then the TAI list refers to Registration Area,
[0128] where RAT (s) includes e.g. NR and / or E-UTRA and / or UTRA and / or GSM, RAT Type (s) includes e.g. NR, NB-IoT, LTE-M, NR_REDCAP, NR_LEO, NB_IoT_LEO and etc.
[0129] If the ATTACH REQUEST message or the TRACKING AREA UPDATE REQUEST message is accepted, the RAT utilization restriction information is included in the ATTACH ACCEPT message or the TRACKING AREA UPDATE ACCEPT message sent by MME to UE. MME may also indicate that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested.
[0130] If the ATTACH REQUEST message or the TRACKING AREA UPDATE REQUEST message is rejected, the RAT utilization restriction information is included in the ATTACH REJECT message or the TRACKING AREA UPDATE REJECT message sent by MME to UE.
[0131] 5. UE: The UE performs any one or more of the following operations: (1) the UE stores the RAT utilization restriction information if received; (2) the UE replaces the stored RAT utilization restriction information for the serving PLMN with the received information; (3) the UE replaces the stored RAT utilization restriction information for each equivalent PLMN with the received information; (4) the UE indicates the RAT utilization restriction information to the access stratum (AS) for cell selection and cell reselection purpose; (5) UE refrains from utilizing the restricted RAT (s) for cell selection and cell reselection as per indicated by RAT utilization restriction information; and / or (6) UE uses supported or recommended RAT (s) for cell selection and cell reselection as per indicated by RAT utilization restriction information.
[0132] 6. UE->MME: In one example, if UE receives ATTACH ACCEPT message or the TRACKING AREA UPDATE ACCEPT message including RAT utilization restriction information and UE receives indicate that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested, UE sends ATTACH COMPLETE message or the TRACKING AREA UPDATE COMPLETE message to MME to acknowledge the successful reception of the RAT utilization restriction information.
[0133] In another example, if the UE receives ATTACH ACCEPT message or the TRACKING AREA UPDATE ACCEPT message including RAT utilization restriction information, the UE sends ATTACH COMPLETE message or the TRACKING AREA UPDATE COMPLETE message to MME to acknowledge the successful reception of the RAT utilization restriction information.
[0134] 7. MME->HSS: If the MME receives UE acknowledgement of successful reception of the RAT utilization restriction information and the MME received the request from HSS, the MME provides the UE acknowledgement of successful reception of the RAT utilization restriction information to HSS in e.g., Notify Request message.
[0135] This patent document describes at least the following technical features:
[0136] ● UE:
[0137] ○ Send Registration Request / Attach Request / TAU Request message to Mobility Management Element (e.g., MME in EPS / AMF in 5GS)
[0138] ■ The request message includes indication of support of RAT utilization restriction information
[0139] ○ Receive from Mobility Management Element RAT utilization restriction information
[0140] ■ RAT utilization restriction information includes list of restricted RAT (s) and / or list of restricted RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0141] ■ RAT utilization restriction information may include list (s) of supported or recommended RAT (s) and / or list of supported or recommended RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0142] ■ RAT utilization restriction information includes indication that whether restriction on the utilization of RAT applies within the current registered PLMN or any tracking area of a TAI list (or Registration Area) and a TAI list.
[0143] ■ The RAT utilization restriction information is included in registration accept / attach accept / TAU accept message or included in registration reject / attach reject / TAU reject message
[0144] ■ May also receive from Mobility Management Element an indication that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested
[0145] ○ UE behavior after receiving RAT utilization restriction information from Mobility Management Element
[0146] ○ Send to Mobility Management Element acknowledgement of successful reception of RAT utilization restriction information
[0147] ● Mobility Management Element (e.g., MME in EPS / AMF in 5GS) :
[0148] ○ Receive from UE Registration Request / Attach Request / TAU Request message
[0149] ■ The request message includes indication of support of RAT utilization restriction information
[0150] ○ Send to Subscription Management Element (HSS in EPS / UDM in 5GS) UE indication of support of RAT utilization restriction information
[0151] ■ May send indication that Mobility Management Element supports RAT utilization restriction functionality
[0152] ■ May send equivalent PLMN list
[0153] ○ Receive from Subscription Management Element RAT utilization restriction information
[0154] ■ RAT utilization restriction information includes list of restricted RAT (s) and / or list of restricted RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0155] ■ RAT utilization restriction information may include list (s) of supported or recommended RAT (s) and / or list of supported or recommended RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0156] ■ RAT utilization restriction information includes indication that whether restriction on the utilization of RAT applies within the current registered PLMN or any tracking area of a TAI list (or Registration Area) and a TAI list.
[0157] ■ May also receive indication that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested
[0158] ■ May receive from Policy Control Element (e.g. PCF in 5GS / PCRF in EPS) RAT utilization restriction information
[0159] ○ Subscribe to Subscription Management Element to be notified when RAT utilization restriction information is modified
[0160] ○ Send to UE RAT utilization restriction information
[0161] ■ RAT utilization restriction information includes list of restricted RAT (s) and / or list of restricted RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0162] ■ RAT utilization restriction information may include list (s) of supported or recommended RAT (s) and / or list of supported or recommended RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0163] ■ RAT utilization restriction information includes indication that whether restriction on the utilization of RAT applies within the current registered PLMN or any tracking area of a TAI list (or Registration Area) and a TAI list.
[0164] ■ The RAT utilization restriction information is included in registration accept / attach accept / TAU accept message or included in registration reject / attach reject / TAU reject message
[0165] ■ May also send an indication that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested
[0166] ■ May determine RAT utilization restriction information based on e.g. HPLMN ID of the UE derived from IMSI
[0167] ■ May modify the RAT utilization restriction information received from Subscription Management Element
[0168] ○ Receive from UE acknowledgement of successful reception of RAT utilization restriction information
[0169] ○ Send to Subscription Management Element UE acknowledgement of successful reception of RAT utilization restriction information
[0170] ● Subscription Management Element (HSS in EPS / UDM in 5GS) :
[0171] ○ Receive from Mobility Management Element (e.g., MME in EPS / AMF in 5GS) UE indication of support of RAT utilization restriction information
[0172] ■ May receive indication that Mobility Management Element supports RAT utilization restriction functionality
[0173] ■ May receive equivalent PLMN list
[0174] ○ Send to Mobility Management Element RAT utilization restriction information
[0175] ■ RAT utilization restriction information includes list of restricted RAT (s) and / or list of restricted RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0176] ■ RAT utilization restriction information may include list (s) of supported or recommended RAT (s) and / or list of supported or recommended RAT Type (s) for serving PLMN and / or equivalent PLMN (s)
[0177] ■ RAT utilization restriction information includes indication that whether restriction on the utilization of RAT applies within the current registered PLMN or any tracking area of a TAI list (or Registration Area) and a TAI list.
[0178] ■ May also send indication that acknowledgement of successful reception of RAT utilization restriction information from the UE is requested
[0179] ○ Receive from Mobility Management Element subscription to be notified when RAT utilization restriction information is modified
[0180] ○ Receive from Mobility Management Element acknowledgement of successful reception of RAT utilization restriction information
[0181] FIG. 5 shows an exemplary block diagram of a hardware platform 500 that may be a part of a network device (e.g., base station) or a communication device (e.g., a user equipment (UE) ) . The hardware platform 500 includes at least one processor 510 and a memory 505 having instructions stored thereupon. The instructions upon execution by the processor 510 configure the hardware platform 500 to perform the operations described in FIGS. 1 to 4 and 6 to 9 in the various embodiments described in this patent document. The transmitter 515 transmits or sends information or data to another device. For example, a network device transmitter can send a message to a user equipment. The receiver 520 receives information or data transmitted or sent by another device. For example, a user equipment can receive a message from a network device.
[0182] The implementations as discussed above will apply to a wireless communication. FIG. 6 shows an example of a wireless communication system (e.g., a 5G or NR cellular network) that includes a base station 620 and one or more user equipment (UE) 611, 612 and 613. In some embodiments, the UEs access the BS (e.g., the network) using a communication link to the network (sometimes called uplink direction, as depicted by dashed arrows 631, 632, 633) , which then enables subsequent communication (e.g., shown in the direction from the network to the UEs, sometimes called downlink direction, shown by arrows 641, 642, 643) from the BS to the UEs. In some embodiments, the BS send information to the UEs (sometimes called downlink direction, as depicted by arrows 641, 642, 643) , which then enables subsequent communication (e.g., shown in the direction from the UEs to the BS, sometimes called uplink direction, shown by dashed arrows 631, 632, 633) from the UEs to the BS. The UE may be, for example, a smartphone, a tablet, a mobile computer, a machine to machine (M2M) device, an Internet of Things (IoT) device, and so on.
[0183] FIG. 7 shows an exemplary flowchart for receiving radio access technology (RAT) utilization restriction information. Operation 702 includes sending, by a communication device to a device comprising a mobility management function, a request that includes an indication that the communication device supports radio access technology (RAT) utilization restriction information. Operation 704 includes receiving, by the communication device from the device, the RAT utilization restriction information.
[0184] In some embodiments, the RAT utilization restriction information includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs. In some embodiments, the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMNs) . In some embodiments, the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN. In some embodiments, the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.
[0185] In some embodiments, the RAT utilization restriction information is included in any one or more of the following messages: a registration accept message, an attach accept message, a tracking area updating (TAU) accept message, a registration reject message, an attach reject message, or a TAU reject message. In some embodiments, the communication device receives another indication that acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device. In some embodiments, the method further comprises performing, by the communication device, an operation in response to receiving the RAT utilization restriction information, where the operation comprises any one or more of: storing the RAT utilization restriction information, replacing a stored RAT utilization restriction information for a serving public land mobile network (PLMN) with the RAT utilization restriction information that is received, replacing the stored RAT utilization restriction information for each equivalent PLMN with the RAT utilization restriction information that is received, indicating the RAT utilization restriction information to an access stratum (AS) for cell selection and / or cell reselection, refraining from utilizing one or more restricted RATs for the cell selection and / or the cell reselection as indicated by the RAT utilization restriction information, and / or utilizing one or more supported or recommended RATs for the cell selection and / or the cell reselection as indicated by the RAT utilization restriction information.
[0186] In some embodiments, the method further comprises transmitting, by the communication device to the mobility management function, an acknowledgement of successful reception of the RAT utilization restriction information. In some embodiments, the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .
[0187] FIG. 8 shows an exemplary flowchart for transmitting radio access technology (RAT) utilization restriction information. Operation 802 includes receiving, by a device comprising a mobility management function, a request that includes an indication that a communication device supports radio access technology (RAT) utilization restriction information. Operation 804 includes transmitting, by the device to the communication device, the RAT utilization restriction information.
[0188] In some embodiments, the RAT utilization restriction information includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs. In some embodiments, the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMNs) . In some embodiments, the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN. In some embodiments, the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list. In some embodiments, the RAT utilization restriction information is included in any one or more of the following messages: a registration accept message, an attach accept message, a tracking area updating (TAU) accept message, a registration reject message, an attach reject message, or a TAU reject message.
[0189] In some embodiments, the device sends another indication that acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device. In some embodiments, the method further comprises sending, by the device to a second device comprising a subscription management function, any one or more of the following: the indication that the communication device supports RAT utilization restriction information, another indication that the mobility management function supports a RAT utilization restriction functionality, and / or a list of equivalent public land mobile network (PLMN) . In some embodiments, the device receives the RAT utilization restriction information from a second device comprising a subscription management function or a policy control function prior to transmitting the RAT utilization restriction information to the communication device. In some embodiments, the device modifies the RAT utilization restriction information received from the second device prior to transmitting the RAT utilization restriction information to the communication device. In some embodiments, the device receives from the second device another indication that an acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device.
[0190] In some embodiments, the RAT utilization restriction information is determined based on a local configuration of the device. In some embodiments, the local configuration includes a home public land mobile network (HPLMN) identifier (ID) of the communication device derived from an international mobile subscriber identity (IMSI) . In some embodiments, the method further comprises receiving, by the device from the communication device, an indication of an acknowledgement that the communication device has received the RAT utilization restriction information. In some embodiments, the method further comprises transmitting, by the device to a second device comprising a subscription management function, another indication of an acknowledgement that the communication device has received the RAT utilization restriction information. In some embodiments, the subscription management function includes a home subscriber server (HSS) or a unified data management (UDM) . In some embodiments, the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .
[0191] FIG. 9 shows another exemplary flowchart for transmitting radio access technology (RAT) utilization restriction information. Operation 902 includes receiving, by a second device comprising a subscription management function from a device comprising a mobility management function, an indication that a communication device supports RAT utilization restriction information. Operation 904 includes transmitting, by the second device to the device, the RAT utilization restriction information.
[0192] In some embodiments, a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs. In some embodiments, the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMN) . In some embodiments, the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN. In some embodiments, the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.
[0193] In some embodiments, the method further comprises transmitting, by the second device to the device, another indication that an acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device. In some embodiments, the method further comprises receiving, by the second device from the device, a message that indicates that the mobility management function subscribes to be notified when the RAT utilization restriction information is modified. In some embodiments, the method further comprises receiving, by the second device from the device, another indication of an acknowledgement of successful reception of the RAT utilization restriction information by the communication device. In some embodiments, the subscription management function includes a home subscriber server (HSS) or a unified data management (UDM) . In some embodiments, the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .
[0194] In this document the term “exemplary” is used to mean “an example of” and, unless otherwise stated, does not imply an ideal or a preferred embodiment.
[0195] Some of the embodiments described herein are described in the general context of methods or processes, which may be implemented in one embodiment by a computer program product, embodied in a computer-readable medium, including computer-executable instructions, such as program code, executed by computers in networked environments. A computer-readable medium may include removable and non-removable storage devices including, but not limited to, Read Only Memory (ROM) , Random Access Memory (RAM) , compact discs (CDs) , digital versatile discs (DVD) , etc. Therefore, the computer-readable media can include a non-transitory storage media. Generally, program modules may include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. Computer-or processor-executable instructions, associated data structures, and program modules represent examples of program code for executing steps of the methods disclosed herein. The particular sequence of such executable instructions or associated data structures represents examples of corresponding acts for implementing the functions described in such steps or processes.
[0196] Some of the disclosed embodiments can be implemented as devices or modules using hardware circuits, software, or combinations thereof. For example, a hardware circuit implementation can include discrete analog and / or digital components that are, for example, integrated as part of a printed circuit board. Alternatively, or additionally, the disclosed components or modules can be implemented as an Application Specific Integrated Circuit (ASIC) and / or as a Field Programmable Gate Array (FPGA) device. Some implementations may additionally or alternatively include a digital signal processor (DSP) that is a specialized microprocessor with an architecture optimized for the operational needs of digital signal processing associated with the disclosed functionalities of this application. Similarly, the various components or sub-components within each module may be implemented in software, hardware or firmware. The connectivity between the modules and / or components within the modules may be provided using any one of the connectivity methods and media that is known in the art, including, but not limited to, communications over the Internet, wired, or wireless networks using the appropriate protocols.
[0197] While this document contains many specifics, these should not be construed as limitations on the scope of an invention that is claimed or of what may be claimed, but rather as descriptions of features specific to particular embodiments. Certain features that are described in this document in the context of separate embodiments can also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment can also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination can in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or a variation of a sub-combination. Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results.
[0198] Only a few implementations and examples are described and other implementations, enhancements and variations can be made based on what is described and illustrated in this disclosure.
Claims
1.A wireless communication method, comprising:sending, by a communication device to a device comprising a mobility management function, a request that includes an indication that the communication device supports radio access technology (RAT) utilization restriction information; andreceiving, by the communication device from the device, the RAT utilization restriction information.2.The method of claim 1, wherein the RAT utilization restriction information includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs.3.The method of claim 1, wherein the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMNs) .4.The method of any one of claim 2 or 3, wherein the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN.5.The method of claim 1, wherein the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.6.The method of claim 1, wherein the RAT utilization restriction information is included in any one or more of the following messages: a registration accept message, an attach accept message, a tracking area updating (TAU) accept message, a registration reject message, an attach reject message, or a TAU reject message.7.The method of claim 1, wherein the communication device receives another indication that acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device.8.The method of claim 1, further comprising:performing, by the communication device, an operation in response to receiving the RAT utilization restriction information, wherein the operation comprises any one or more of:storing the RAT utilization restriction information,replacing a stored RAT utilization restriction information for a serving public land mobile network (PLMN) with the RAT utilization restriction information that is received,replacing the stored RAT utilization restriction information for each equivalent PLMN with the RAT utilization restriction information that is received,indicating the RAT utilization restriction information to an access stratum (AS) for cell selection and / or cell reselection,refraining from utilizing one or more restricted RATs for the cell selection and / or the cell reselection as indicated by the RAT utilization restriction information, orutilizing one or more supported or recommended RATs for the cell selection and / or the cell reselection as indicated by the RAT utilization restriction information.9.The method of claim 1, further comprising:transmitting, by the communication device to the mobility management function, an acknowledgement of successful reception of the RAT utilization restriction information.10.The method of any one of claims 1 to 9, wherein the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .11.A wireless communication method, comprising:receiving, by a device comprising a mobility management function, a request that includes an indication that a communication device supports radio access technology (RAT) utilization restriction information; andtransmitting, by the device to the communication device, the RAT utilization restriction information.12.The method of claim 11, wherein the RAT utilization restriction information includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs.13.The method of claim 11, wherein the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMNs) .14.The method of any one of claim 12 or 13, wherein the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN.15.The method of claim 11, wherein the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.16.The method of claim 11, wherein the RAT utilization restriction information is included in any one or more of the following messages: a registration accept message, an attach accept message, a tracking area updating (TAU) accept message, a registration reject message, an attach reject message, or a TAU reject message.17.The method of claim 11, wherein the device sends another indication that acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device.18.The method of claim 11, further comprising:sending, by the device to a second device comprising a subscription management function, any one or more of the following:the indication that the communication device supports RAT utilization restriction information,another indication that the mobility management function supports a RAT utilization restriction functionality, and / ora list of equivalent public land mobile network (PLMN) .19.The method of claim 11, wherein the device receives the RAT utilization restriction information from a second device comprising a subscription management function or a policy control function prior to transmitting the RAT utilization restriction information to the communication device.20.The method of claim 19, wherein the device modifies the RAT utilization restriction information received from the second device prior to transmitting the RAT utilization restriction information to the communication device.21.The method of claim 19, wherein the device receives from the second device another indication that an acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device.22.The method of claim 11, wherein the RAT utilization restriction information is determined based on a local configuration of the device.23.The method of claim 22, wherein the local configuration includes a home public land mobile network (HPLMN) identifier (ID) of the communication device derived from an international mobile subscriber identity (IMSI) .24.The method of claim 11, further comprising:receiving, by the device from the communication device, an indication of an acknowledgement that the communication device has received the RAT utilization restriction information.25.The method of claim 11, further comprisingtransmitting, by the device to a second device comprising a subscription management function, another indication of an acknowledgement that the communication device has received the RAT utilization restriction information.26.The method of any one of claims 18 to 21 and 25, wherein the subscription management function includes a home subscriber server (HSS) or a unified data management (UDM) .27.The method of any one of claims 11 to 25, wherein the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .28.A wireless communication method, comprising:receiving, by a second device comprising a subscription management function from a device comprising a mobility management function, an indication that a communication device supports RAT utilization restriction information; andtransmitting, by the second device to the device, the RAT utilization restriction information.29.The method of claim 28, includes a first set of one or more lists of one or more restricted RATs for one or more public land mobile networks (PLMNs) and / or a second set of one or more lists of one or more restricted RAT types for one or more PLMNs.30.The method of claim 28, wherein the RAT utilization restriction information includes a set of one or more list of one or more supported RATs or one or more recommended RATs and / or a set of one or more lists of one or more supported RAT Types or one or more recommended RAT Types for one or more public land mobile networks (PLMN) .31.The method of any one of claim 29 or 30, wherein the one or more PLMNs include a serving PLMN or an equivalent PLMN that is equivalent to the serving PLMN.32.The method of claim 28, wherein the RAT utilization restriction information includes another indication of whether a restriction on a utilization of a RAT applies within a public land mobile network (PLMN) on which the communication device is registered or whether the restriction on the utilization of the RAT applies to any tracking area of a tracking area identity (TAI) list and a TAI list.33.The method of claim 28, further comprising:transmitting, by the second device to the device, another indication that an acknowledgement of successful reception of the RAT utilization restriction information is requested from the communication device.34.The method of claim 28, further comprising:receiving, by the second device from the device, a message that indicates that the mobility management function subscribes to be notified when the RAT utilization restriction information is modified.35.The method of claim 28, further comprising:receiving, by the second device from the device, another indication of an acknowledgement of successful reception of the RAT utilization restriction information by the communication device.36.The method of any one of claims 28 to 35, wherein the subscription management function includes a home subscriber server (HSS) or a unified data management (UDM) .37.The method of any one of claims 28 to 35, wherein the mobility management function incudes a mobility management entity (MME) or an access and mobility management function (AMF) .38.An apparatus for wireless communication comprising one or more processors, configured to cause the apparatus to implement a method recited in one or more of claims 1 to 37.39.A non-transitory computer readable program storage medium having code stored thereon, the code, when executed by one or more processors, causing an apparatus to implement a method recited in one or more of claims 1 to 37.
Citation Information
Patent Citations
V2x UE with different PC5 rat capability in 5gs
US20220053449A1
Method and apparatus for roaming restrictions of forbidden radio access networks in a wireless system
WO2012140475A1
Management of vehicle-to-everything PC5 capability in 5g systems
WO2020150268A1
Roaming radio access to a public land mobile network
WO2024002963A1
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