Wireless communication method and related apparatuses
By allowing the LMF to subscribe to the SMF's notification service for PS Data Off status updates, the solution addresses inefficiencies in the 3GPP architecture, reducing network resource waste and improving communication performance.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- GUANGDONG OPPO MOBILE TELECOMMUNICATIONS CORP LTD
- Filing Date
- 2025-10-10
- Publication Date
- 2026-05-15
AI Technical Summary
The existing 3GPP architecture lacks a mechanism for the Location Management Function (LMF) to remain updated on the Packet Switched (PS) Data Off status in User Equipment (UE), leading to inefficiencies and wasted network resources due to repeated connection attempts and lack of direct communication with the Session Management Function (SMF).
The LMF subscribes to the SMF's notification service, such as the Notify SM Context Status or Nsmf_EventExposure_Notify service, to directly receive updates on the PS Data Off status in UE, enabling efficient and timely awareness of status changes.
This solution reduces time and network resources by eliminating the need for repeated connection setups and indirect signaling, ensuring the LMF is always aware of the UE's PS Data Off status, enhancing communication performance and reliability.
Smart Images

Figure CN2025126625_15052026_PF_FP_ABST
Abstract
Description
WIRELESS COMMUNICATION METHOD AND RELATED APPARATUSESTECHNICAL FIELD
[0001] The present application relates to wireless communication, and more particularly, to a wireless communication method and related apparatuses.BACKGROUND ART
[0002] In cellular wireless communication systems developed by the Third Generation Partnership Project (3GPP) , user equipment (UE) is connected by a wireless link to a radio access network (RAN) . The RAN includes a set of base stations (BSs) which provide wireless links to UEs located in cells covered by the base station and an interface to a core network (CN) which provides overall network control. The RAN and CN each conduct respective functions in relation to the overall network. The so-called 4G Long Term Evolution (LTE) system, namely, an Evolved Universal Mobile Telecommunication System Territorial Radio Access Network (E-UTRAN) has been developed for a mobile access network where one or more macro-cells are supported by a base station known as an eNodeB or eNB (evolved NodeB) . Evolved from LTE, the so-called 5G or new radio (NR) systems where one or more cells are supported by a base station known as a gNB. Envisioned to succeed the current 5G networks, the 6G cellular system is the forthcoming generation of wireless communication technology.
[0003] Location-Based Services (LBS) acquire terminal location data via wireless communication networks or other positioning systems, then integrate this information with Geographic Information Systems (GIS) to deliver a range of location-based information to end users. Today, outdoor positioning based on the Global Navigation Satellite System (GNSS) is widely adopted in various fields. As wireless communication technologies advance, the high-precision positioning technology based on the mobile communication network effectively fill the gaps left by satellite navigation in certain scenarios. The location network architecture demands even higher accuracy and lower latency. In the core network architecture, the LMF (Location Management Function) is the network entity responsible for supporting positioning and location services for user equipment (UE) .
[0004] The 3GPP specification introduces a feature known as 3GPP Packet Switched (PS) Data Off. The 3GPP PS Data Off feature, when activated by the user, prevents traffic over 3GPP access for all IP packets, Unstructured data, and Ethernet data -except for those services designated as 3GPP PS Data Off Exempt Services that are the only allowed services when the 3GPP PS Data Off is active. Examples of the 3GPP PS Data Off Exempt Services include MMTel Voice (voice over IMS) , SMS over IMS (SMS over IP) , and etc.
[0005] When a user equipment (UE) requests establishment of a Protocol Data Unit (PDU) Session (associated with 3GPP access and / or non-3GPP access) , the UE reports its 3GPP PS Data Off status in the Protocol Configuration Option (PCO) to the Session Management Function (SMF) in the PDU Session Establishment procedure. Critically, the PS Data Off status of a PDU Session applies only to 3GPP access. It does not affect data transfer over non-3GPP access.
[0006] Once the PS Data Off feature is activated, the UE suppresses the sending of uplink IP packets, unstructured data, and Ethernet data except for those related to 3GPP PS Data Off Exempt Services. If the PS Data Off status changes (e.g., is deactivated) , the UE has to inform the network immediately via a UE-initiated PDU Session Modification procedure, updating its PCO to reflect the new status. In this way, the SMF is kept informed about current PS Data Off status for the PDU Session.
[0007] The Access and Mobility Management Function (AMF) however transparently forwards this information to the SMF within Create SM Context service operation and also within Update SM Context service operation (which may be referred to clause 5.2.2.2 and clause 5.2.2.3 in 3GPP TS 29.502) . In both cases, the PS Data Off status is “hidden” to AMF within N1 SM Message binary data ( “n1SmMsg” attribute of type “RefToBinaryData” within “SmContextUpdateData” and “SmContextCreateData” structures) .
[0008] Currently, two significant shortcomings remain in the existing 3GPP architecture as follows: (1) The LMF is not a subscriber to the SMF’s Notify SM Context Status service operation. As a result, there is no straightforward mechanism by which the LMF can remain up to date on the PS Data Off status in the UE. (2) The LMF is not provided with any information to facilitate communication with the SMF that has been selected for a given UE. Thus, even if the LMF were interested in tracking or reacting to the PS Data Off status, it lacks the necessary link or addressing information to coordinate with the SMF.
[0009] Because many location or positioning services may need to consider or adapt to the PS Data Off status (for example, for power saving, data usage policies, or service continuity) , these gaps in visibility and connectivity pose a barrier to more integrated, efficient, and responsive operations.
[0010] In the state of the art, which may be referred to 3GPP TS 24.572 in particular, 3GPP CT1 attempts to address the interaction between UE location services and the PS Data Off feature by specifying a workaround as follows. Despite the fact that the LMF cannot know if the UE can send uplink necessary user plane data, LMF triggers a network-initiated user plane connection establishment procedure. If in the UE the PS Data Off status is “activated” , the UE should reject the connection establishment request, returning a failure cause value “user plane not available” . If the LMF receives such a failure cause value, the LMF knows that the PS Data Off status in the UE is probably activated. However, This leads to wasted time and network resources (especially the radio resources) since the network has to perform attempted connection setups.
[0011] Another deficiency lies in how the UE’s PS Data Off status transitions are handled. Suppose the PS Data Off status in the UE changes from “activated” to “deactivated. ” Under the existing specification (3GPP TS 24.572) , there is no defined procedure for informing the LMF of this status change. 3GPP CT1 discussed two proposals but could not reach any agreement. One of these proposes to trigger the existing NAS message with a new indication, while the other proposes to trigger a new NAS message. In either case, the time and the network resources will be spared.SUMMARY
[0012] An object of the present application is to propose a wireless communication method and related apparatuses, which can keep a network node aware of packet switched (PS) data off status in the UE, reduce the time and the network resources, increase communication performance, and / or provide high reliability.
[0013] In a first aspect of the present application, provided is a wireless communication method, performed by a first network node, including obtaining information of a second network node; subscribing to a notification service of the second network node according to the information of the second network node; and receiving, by using the notification service of the second network node, a notification containing packet switched (PS) data off status in a user equipment (UE) .
[0014] In a second aspect of the present application, provided is a wireless communication method, performed by a second network node, including sending to a first network node a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node is subscribed to a notification service of the second network node to receive the notification.
[0015] In a third aspect of the present application, provided is a first network node, including an obtaining module, configured to obtain information of a second network node; a subscribing module, configured to subscribe to a notification service of the second network node according to the information of the second network node; and a receiving module, configured to use the notification service of the second network node to receive a notification containing packet switched (PS) data off status in a user equipment (UE) .
[0016] In a fourth aspect of the present application, provided is a second network node, including a sending module, configured to send to a first network node a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node is subscribed to a notification service of the second network node to receive the notification.
[0017] In a fifth aspect of the present application, provided is a first network node, including at least one memory configured to store program instructions; and at least one processor configured to execute the program instructions, which cause the at least one processor to execute the method in accordance with the first aspect described above.
[0018] In a sixth aspect of the present application, provided is a second network node, including at least one memory configured to store program instructions; and at least one processor configured to execute the program instructions, which cause the at least one processor to execute the method in accordance with the second aspect described above.
[0019] In a seventh aspect of the present application, a non-transitory machine-readable storage medium has stored thereon instructions that, when executed by a computer, cause the computer to execute any of the above methods.
[0020] In an eighth aspect of the present application, a chip includes a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute any of the above methods.
[0021] In a ninth aspect of the present application, a computer readable storage medium, in which a computer program is stored, causes a computer to execute any of the above methods.
[0022] In a tenth aspect of the present application, a computer program product includes a computer program, and the computer program causes a computer to execute any of the above methods.
[0023] In an eleventh aspect of the present application, a computer program causes a computer to execute any of the above methods.DESCRIPTION OF DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present application or related art, the following figures that will be described in the embodiments are briefly introduced. It is obvious that the drawings are merely some embodiments of the present application, a person having ordinary skill in this field can obtain other figures according to these figures without paying the premise.
[0025] FIG. 1 is a schematic diagram illustrating a 5th-Generation (5G) architecture according to an embodiment of the present application.
[0026] FIG. 2 is a schematic diagram illustrating a 5G architecture in a service-based representation.
[0027] FIG. 3 is a flowchart of a wireless communication method implemented by a first network node (e.g., LMF) according to an embodiment of the present application.
[0028] FIG. 4 is a flowchart of a wireless communication method implemented by a second network node (e.g., SMF) according to an embodiment of the present application.
[0029] FIG. 5 is a block diagram of a first network node (e.g., LMF) according to an embodiment of the present application.
[0030] FIG. 6 is a block diagram of a second network node (e.g., SMF) according to an embodiment of the present application.DETAILED DESCRIPTION OF EMBODIMENTS
[0031] Embodiments of the disclosure are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. Specifically, the terminologies in the embodiments of the present application are merely for describing the purpose of the certain embodiment, but not to limit the disclosure.
[0032] In this document, the term “ / ” should be interpreted to indicate “and / or. ” A combination such as “at least one of A, B, or C, ” “one or more of A, B, or C, ” “at least one of A, B, and C, ” “one or more of A, B, and C, ” or “A, B, and / or C” may be A only, B only, C only, A and B, A and C, B and C, or A and B and C, where any combination may contain one or more members of A, B, or C.
[0033] The following table includes some abbreviations that may be used in some embodiments of the present application:
[0034] This application proposes solutions for allowing a location management function (LMF) to identify a session management function (SMF) and to subscribe to the SMF notification service so as to keep the LMF aware of the packet switched (PS) data off status in a user equipment (UE) . This approach can reduce the time and the network resources (e.g., radio resources) as compared to the existing arts. In one embodiment, the SMF notification service can be a context status notification service (e.g., which provides the Notify SM Context Status service) . In another embodiment, the SMF notification service can be an event exposure notification service (e.g., which provides the Nsmf_EventExposure_Notify service operation) . It is noted that the solutions proposed in this application may be related to 3GPP TS 23.273.
[0035] FIG. 1 shows a 5G architecture. Devices involved in the 5G architecture include UE, a Radio Access Network (RAN) , a User Plane Function (UPF) , an Access and Mobility Management Function (AMF) , a Location Management Function (LMF) , a Unified Data Management (UDM) , a Network Exposure Function (NEF) , a Network Data Analytics Function (NWDAF) , a Gateway Mobile Location Center (GMLC) , a Local Retrieval Function (LRF) and an Application Function (AF) . It is noted that this application may be illustrated by using the architecture shown in FIG. 1; however, this application may be applicable to future communication system such as 6G system.
[0036] As shown in FIG. 1, the UPF plays a crucial role in the user plane architecture of the core network, specifically within the 5G Core (5GC) . The UPF is responsible for managing and forwarding user plane data traffic between the RAN and external data networks, such as the Internet or private networks. The AMF is mainly responsible for executing access and UE mobility management tasks. The LMF provides the overall co-ordination and scheduling of resources required for the location of a UE that is registered with or accessing 5GCN. It also calculates a final location or any velocity estimate. Some of the UDM functionalities are user identification handling and access authorization based on subscription data. Some of the functionalities of NEF are exposure of capabilities, events and analytics, and secure provisioning of information from external applications to the 5G network. GMLC functionalities include the support for 5GC related periodic, triggered and UE available location events to external clients after performing authorization. The LRF’s responsibility is to retrieve or validate the location information for a UE which has initiated an IMS emergency session. The NWDAF collects, analyzes, and provides insights from network data, enabling various applications and improving network performance. The AF interacts with the 3GPP Core Network to provide services.
[0037] FIG. 2 shows a 5G architecture in a service-based representation. It is noted that this application is applicable to the architecture shown in FIG. 2, but is not limited thereto. The application can also be applied to future communication system such as 6G system.
[0038] The illustrated 5G system architecture in FIG. 2 can be service-based and interaction between network functions can be represented by corresponding service-based interfaces. As illustrated in FIG. 2, service-based representations can be used to represent network functions that enable other authorized network functions to access their services. In this regard, 5G system architecture can include the following service-based interfaces: Namf (a service-based interface exhibited by the AMF) , Nlmf (a service-based interface exhibited by the LMF) , Ngmlc (a service-based interface exhibited by the GMLC) , Nnef (a service-based interface exhibited by the NEF) , a Nudr (a service-based interface exhibited by the UDR) , a Nudm (a service-based interface exhibited by the UDM) , Naf (a service-based interface exhibited by the AF) , Nnwdaf (a service-based interface exhibited by the NWDAF) . Other service-based interfaces can also be used.
[0039] FIG. 3 is a flowchart of a wireless communication method 100 implemented by a first network node (e.g., LMF) according to an embodiment of the present application. Referring to FIG. 3, the method 100 includes the following steps.
[0040] In Step 102, the first network node (e.g., LMF) obtains information of a second network node (e.g., SMF) .
[0041] In this step, the LMF obtains information of the SMF. The information of the SMF may be location information of the SMF. For example, the location information of the SMF may include a fully qualified domain name (FQDN) or an internet protocol (IP) address of the SMF. This can be accomplished in the following two alternative embodiments.
[0042] In a first embodiment, the obtaining information of the SMF may include obtaining the location information of the SMF from a third network node (e.g., AMF) with a notification service operation associated with the third network node (e.g., AMF) . For example, the AMF may send the SMF's FQDN and / or IP addresses to the LMF with the notification service operation (e.g., Namf_N1MessageNotify service operation) .
[0043] More specifically, the notification service operation associated with the AMF may query a data structure including an attribute name and a data type that are associated with the location information of the SMF. In an exemplary example, the notification service operation associated with the AMF can be N1MessageNotify service operation. As to this service operation, N1MessageNotification type defined in clause 6.1.6.2.16 in the existing 3GPP TS 29.518 will have to be enhanced. A new attribute of type such as “IpAddress” may have to be added. The corresponding attribute name can be “smfIpAddr” or the like. In such a way, the AMF can inform the LMF of the IP address of the selected SMF with the N1MessageNotify service operation.
[0044] In a second embodiment, the obtaining information of the SMF may include sending to a fourth network node (e.g., UDM) a UE context request message to request UE context; and receiving from the fourth network node (e.g., UDM) a UE context response message to receive the UE context which is used to obtain the location information of the SMF. For example, the LMF may send to the UDM UE context request message (e.g., the Nudm_UECM_Get_Request message) and receives the SMF information (e.g., the SMF’s location information or useful information to get the SMF’s location information) with UE context response message (e.g., the Nudm_UECM_Get_Response message) .
[0045] More specifically, the received UE context may contain an instance identifier of the SMF, which can be resolved to obtain the location information of the SMF. In an exemplary example, the Nudm_UECM Get service operation in Nudm_UEContextManagement Service can be used. The LMF can discover the UDM by querying NRF. After sending a GET request message to the UDM, the LMF will receive a GET response message, which contains SmfRegistration data structure, which in turn currently contains “smfInstanceId” attribute. The LMF may further need to resolve the value of the “smfInstanceId” attribute to the IP address of the SMF.
[0046] In this step, the information of the SMF may also be an identifier of the SMF. For example, the AMF may provision the LMF with the SMF identifier and Session ID of the dedicated PDU Session for the user plane positioning with the Nlmf_Location_UPConfig Request message (which may be referred to clause 5.2.2.9 in 3GPP TS 29.572) .
[0047] In Step 104, the first network node (e.g., LMF) subscribes to a notification service of the second network node (e.g., SMF) according to the information of the second network node (e.g., SMF) .
[0048] Since the LMF possesses the location information and / or the identifier of the SMF, it can subscribe to a notification service of the SMF. In one exemplary example, the SMF notification service may be a context status notification service (e.g., the Notify SM Context Status service, which may be referred to clause 5.2.8.1 in 3GPP TS 23.502) . In another exemplary example, the SMF notification service can be an event exposure notification service (e.g., the Nsmf_EventExposure_Notify service operation, which may be referred to clause 4.4.2 in 3GPP TS 29.508) .
[0049] In Step 106, the first network node (e.g., LMF) receives, by using the notification service of the second network node (e.g., SMF) , a notification containing packet switched (PS) data off status in a user equipment (UE) .
[0050] In this step, with the notification service of the SMF, the LMF can acquire the PS data off status in the UE directly from the SMF. The notification containing the PS data off status of the UE may be received by the LMF every time the PS data off status changes in the UE. Compared to the existing arts, the time and the network resources (e.g., radio resources) are reduced since the LMF does not need to repeatedly trigger unsuccessful user plane connection establishment procedures or rely on indirect signaling exchanges, but instead, the LMF receives the PS data off status through a direct and efficient notification mechanism from the SMF.
[0051] It is noted that the PS data off feature, when activated by the user, prevents traffic over 3GPP access for all IP packets, unstructured data, and ethernet data -except for those services designated as PS data off exempt services that are the only allowed services when the PS data off is active.
[0052] More specifically, for the context status notification service (e.g., the Notify SM Context Status service) , the notification containing the PS data off status in the UE may be included in a notification of context status associated with the SMF. In addition, the notification of context status associated with the SMF may contain a resource status parameter indicating the PS data off status in the UE. For example, the LMF can subscribe to the Notify SM Context Status service operation (Nsmf_PDUSession_SMContextStatusNotify, which may be referred to clause 5.2.8.1 in 3GPP TS 23.502) . Every time the PS data off status changes in the UE, the LMF will receive the SM Context Status Notification request message (which may be referred to clause 6.1.5.2 in 3GPP TS 29.502) . In this message, the “SmContextStatusNotification” data structure contains a mandatory “statusInfo” attribute of type “StatusInfo” , which in turn contains the “ResourceStatus” enumeration. All other attributes are irrelevant for the LMF and therefore the SMF will not send them.
[0053] For example, the SMF supports the following services as shown in Table 1 below, including Nsmf_PDUSession, Nsmf_EventExposure and Nsmf_NIDD.
[0054] Table 1: NF Services provided by SMF
[0055] The Nsmf_PDUSession service supports the Notify SM Context Status service operation, as shown in Table 2 below.
[0056] Table 2: Service operations supported by the Nsmf_PDUSession service
[0057] An example of the “SmContextStatusNotification” request data structure is shown in Table 3 below.
[0058] Table 3: Data structures supported by the POST Request Body
[0059] The definition of type “SmContextStatusNotification” is shown in Table 4 below, which contains a mandatory “statusInfo” attribute of type “StatusInfo” .
[0060] Table 4: Definition of type SmContextStatusNotification
[0061] The definition of type “StatusInfo” is shown in Table 5 below, which contains a mandatory “resourceStatus” attribute of type “ResourceStatus” .
[0062] Table 5: Definition of type StatusInfo
[0063] In some embodiments, the resource status parameter (e.g., the “ResourceStatus” enumeration) includes a first value used to indicate that the PS data off status is activated and a second value used to indicate that the PS data off status is deactivated. It is noted that in current 3GPP specification, the “ResourceStatus” enumeration does not support informing the receiver on the PS data off status in the UE. This application proposes to add two new values to the “ResourceStatus” enumeration, that is “3GPP_PSDATAOFF_ACTIVATED” and “3GPP_PSDATAOFF_DEACTIVATED” , as shown in Table 6 below.
[0064] Table 6: Enumeration ResourceStatus
[0065] For the event exposure notification service (e.g., the Nsmf_EventExposure service) , the notification containing the PS data off status in the UE may be included in a notification of event exposure associated with the SMF. For example, the LMF can subscribe to the Nsmf_EventExposure service. Every time the PS data off status changes in the UE, Nsmf_EventExposure_Notify service operation will inform the LMF about this (which may be referred to clause 4.4.2 in 3GPP TS 29.508) .
[0066] In the embodiments of the present application, the proposed solutions (a) enable the LMF to identify the already selected SMF, (b) enable subscription to some SMF notification service and (c) specify new encoding of the notification request message. This will keep the LMF aware of the PS data off status in the UE.
[0067] FIG. 4 is a flowchart of a wireless communication method 200 implemented by a second network node (e.g., SMF) according to an embodiment of the present application. Referring to FIG. 4, the wireless communication method 200 includes the following steps. In Step 202, the SMF sends to a first network node (e.g., LMF) a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node is subscribed to a notification service of the second network node to receive the notification. This can reduce the time and the network resources (e.g., radio resources) as compared to the existing arts. Other details of the method 200 may be referred to the method 100 described above and are not repeated herein.
[0068] FIG. 5 is a block diagram of a first network node (e.g., LMF) according to an embodiment of the present application. As shown in FIG. 5, the first network node (e.g., LMF) 1000 includes an obtaining module 1001, a subscribing module 1002 and a receiving module 1003. The obtaining module 1001 is configured to obtain information of a second network node (e.g., SMF) . The subscribing module 1002 is configured to subscribe to a notification service of the second network node (e.g., SMF) according to the information of the second network node (e.g., SMF) . The receiving module 1003 is configured to use the notification service of the second network node (e.g., SMF) to receive a notification containing packet switched (PS) data off status in a user equipment (UE) . This can reduce the time and the network resources (e.g., radio resources) as compared to the existing arts. Other details of the first network node 1000 may be referred to the method 100 described above and are not repeated herein.
[0069] In some embodiments of the first network node, the notification is received by the first network node every time the PS data off status changes in the UE.
[0070] In some embodiments of the first network node, the information of the second network node includes location information of the second network node.
[0071] In some embodiments of the first network node, the location information of the second network node includes a fully qualified domain name (FQDN) or an internet protocol (IP) address of the second network node.
[0072] In some embodiments of the first network node, the obtaining module is further configured to obtain the location information of the second network node from a third network node with a notification service operation associated with the third network node.
[0073] In some embodiments of the first network node, the notification service operation associated with the third network node queries a data structure including an attribute name and a data type that are associated with the location information of the second network node.
[0074] In some embodiments of the first network node, the third network node includes an access and mobility management function (AMF) .
[0075] In some embodiments of the first network node, the obtaining module is further configured to send to a fourth network node a UE context request message to request UE context and receive from the fourth network node a UE context response message to receive the UE context which is used to obtain the location information of the second network node.
[0076] In some embodiments of the first network node, the UE context contains an instance identifier of the second network node, which is resolved to obtain the location information of the second network node.
[0077] In some embodiments of the first network node, the fourth network node includes a unified data management (UDM) function.
[0078] In some embodiments of the first network node, the notification service includes a context status notification service, and the notification containing the PS data off status in the UE is included in a notification of context status associated with the second network node.
[0079] In some embodiments of the first network node, the notification of context status associated with the second network node contains a resource status parameter indicating the PS data off status in the UE.
[0080] In some embodiments of the first network node, the resource status parameter includes a first value used to indicate that the PS data off status is activated and a second value used to indicate that the PS data off status is deactivated.
[0081] In some embodiments of the first network node, the information of the second network node includes an identifier of the second network node.
[0082] In some embodiments of the first network node, the notification service includes an event exposure notification service, and the notification containing the PS data off status in the UE is included in a notification of event exposure associated with the second network node.
[0083] FIG. 6 is a block diagram of a second network node (e.g., SMF) according to an embodiment of the present application. As shown in FIG. 6, the second network node (e.g., SMF) 2000 includes a sending module 2001. The sending module 2001 is configured to send to a first network node (e.g., LMF) a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node (e.g., LMF) is subscribed to a notification service of the second network node (e.g., SMF) to receive the notification. This can reduce the time and the network resources (e.g., radio resources) as compared to the existing arts. Other details of the second network node 2000 may be referred to the method 200 described above and are not repeated herein.
[0084] In some embodiments of the second network node, the notification is sent by the second network node every time the PS data off status changes in the UE.
[0085] In some embodiments of the second network node, the notification service includes a context status notification service, and the notification containing the PS data off status in the UE is included in a notification of context status associated with the second network node.
[0086] In some embodiments of the second network node, the notification of context status associated with the second network node contains a resource status parameter indicating the PS data off status in the UE.
[0087] In some embodiments of the second network node, the resource status parameter includes a first value used to indicate that the PS data off status is activated and a second value used to indicate that the PS data off status is deactivated.
[0088] In some embodiments of the second network node, the notification service includes an event exposure notification service, and the notification containing the PS data off status in the UE is included in a notification of event exposure associated with the second network node.
[0089] The embodiment of the present application further provides a first network node (e.g., LMF) , which includes at least one memory configured to store program instructions and at least one processor configured to execute the program instructions, which cause the at least one processor to obtain information of a second network node (e.g., SMF) , subscribe to a notification service of the second network node according to the information of the second network node, and use the notification service of the second network node to receive a notification containing packet switched (PS) data off status in a user equipment (UE) . This can reduce the time and the network resources (e.g., radio resources) as compared to the existing arts. Other details of the first network node may be referred to the method 100 described above and are not repeated herein.
[0090] The embodiment of the present application further provides a second network node (e.g., SMF) , which includes at least one memory configured to store program instructions and at least one processor configured to execute the program instructions, which cause the at least one processor to send to a first network node (e.g., LMF) a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node is subscribed to a notification service of the second network node to receive the notification. This can reduce the time and the network resources (e.g., radio resources) as compared to the existing arts. Other details of the second network node may be referred to the method 200 described above and are not repeated herein.
[0091] The embodiment of the present application further provides a computer readable storage medium for storing a computer program. The computer readable storage medium enables a computer to execute corresponding processes implemented in each of the methods of the embodiments of the present application. For brevity, details will not be described herein again.
[0092] The embodiment of the present application further provides a computer program product including computer program instructions. The computer program product enables a computer to execute corresponding processes implemented in each of the methods of the embodiments of the present application. For brevity, details will not be described herein again.
[0093] The embodiment of the present application further provides a computer program. The computer program enables a computer to execute corresponding processes implemented in each of the methods of the embodiments of the present application. For brevity, details will not be described herein again.
[0094] The description of above device embodiments is similar to the description of above method embodiments, having beneficial effects similar to the method embodiments. For technical details not disclosed in the device embodiments of the present application, please refer to the description of the method embodiments of the present application for the purpose of understanding.
[0095] Those of skill in the art will appreciate that information and signals may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the above description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0096] Further, those of skill in the art will appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
[0097] The methods, sequences and / or algorithms described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
[0098] It should be understood that any embodiments disclosed herein as being “non-transitory” do not exclude any physical storage medium, but rather exclude only the interpretation that the medium can be construed as a transitory propagating signal.
[0099] The elements and components of an embodiment of the invention may be physically, functionally and logically implemented in any suitable way. Indeed, the functionality may be implemented in a single unit, in a plurality of units or as part of other functional units. Although the present invention has been described in connection with some embodiments, it is not intended to be limited to the specific form set forth herein. Rather, the scope of the present invention is limited only by the accompanying claims. Additionally, although a feature may appear to be described in connection with particular embodiments, one skilled in the art would recognize that various features of the described embodiments may be combined in accordance with the invention. In the claims, the term ‘including’ does not exclude the presence of other elements or steps.
[0100] Furthermore, although individually listed, a plurality of means, elements or method steps may be implemented by, for example, a single unit or processor. Additionally, although individual features may be included in different claims, these may possibly be advantageously combined, and the inclusion in different claims does not imply that a combination of features is not feasible and / or advantageous. Also, the inclusion of a feature in one category of claims does not imply a limitation to this category, but rather indicates that the feature is equally applicable to other claim categories, as appropriate.
[0101] Furthermore, the order of features in the claims does not imply any specific order in which the features must be performed and in particular the order of individual steps in a method claim does not imply that the steps must be performed in this order. Rather, the steps may be performed in any suitable order. In addition, singular references do not exclude a plurality. Thus, references to ‘a’ , ‘an’ , ‘first’ , ‘second’ , etc. do not preclude a plurality.
[0102] Above all, while the preferred embodiments of the present application have been illustrated and described in detail, various modifications and alterations can be made by persons of ordinary skill in the art. The embodiment of the present application is therefore described in an illustrative but not restrictive sense. It is intended that the present application should not be limited to the particular forms as illustrated, and that all modifications and alterations which maintain the spirit and realm of the present application are within the scope as defined in the appended claims.
Claims
1.A wireless communication method, performed by a first network node, comprising:obtaining information of a second network node;subscribing to a notification service of the second network node according to the information of the second network node; andreceiving, by using the notification service of the second network node, a notification containing packet switched (PS) data off status in a user equipment (UE) .2.The method of claim 1, wherein the notification is received by the first network node every time the PS data off status changes in the UE.3.The method of claim 1 or 2, wherein the first network node comprises a location management function (LMF) .4.The method of any of claims 1 to 3, wherein the second network node comprises a session management function (SMF) .5.The method of any of claims 1 to 4, wherein the information of the second network node comprises location information of the second network node.6.The method of claim 5, wherein the location information of the second network node comprises a fully qualified domain name (FQDN) or an internet protocol (IP) address of the second network node.7.The method of claim 5 or 6, wherein the obtaining information of the second network node comprises:obtaining the location information of the second network node from a third network node with a notification service operation associated with the third network node.8.The method of claim 7, wherein the notification service operation associated with the third network node queries a data structure comprising an attribute name and a data type that are associated with the location information of the second network node.9.The method of claim 7 or 8, wherein the third network node comprises an access and mobility management function (AMF) .10.The method of claim 5 or 6, wherein the obtaining information of the second network node comprises:sending to a fourth network node a UE context request message to request UE context; andreceiving from the fourth network node a UE context response message to receive the UE context which is used to obtain the location information of the second network node.11.The method of claim 10, wherein the UE context contains an instance identifier of the second network node, which is resolved to obtain the location information of the second network node.12.The method of claim 10 or 11, wherein the fourth network node comprises a unified data management (UDM) function.13.The method of any of claims 1 to 12, wherein the notification service comprises a context status notification service, and the notification containing the PS data off status in the UE is included in a notification of context status associated with the second network node.14.The method of claim 13, wherein the notification of context status associated with the second network node contains a resource status parameter indicating the PS data off status in the UE.15.The method of claim 14, wherein the resource status parameter comprises a first value used to indicate that the PS data off status is activated and a second value used to indicate that the PS data off status is deactivated.16.The method of any of claims 1 to 15, wherein the information of the second network node comprises an identifier of the second network node.17.The method of any of claims 1 to 16, wherein the notification service comprises an event exposure notification service, and the notification containing the PS data off status in the UE is included in a notification of event exposure associated with the second network node.18.A wireless communication method, performed by a second network node, comprising:sending to a first network node a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node is subscribed to a notification service of the second network node to receive the notification.19.The method of claim 18, wherein the notification is sent by the second network node every time the PS data off status changes in the UE.20.The method of claim 18 or 19, wherein the first network node comprises a location management function (LMF) .21.The method of any of claims 18 to 20, wherein the second network node comprises a session management function (SMF) .22.The method of any of claims 18 to 21, wherein the notification service comprises a context status notification service, and the notification containing the PS data off status in the UE is included in a notification of context status associated with the second network node.23.The method of claim 22, wherein the notification of context status associated with the second network node contains a resource status parameter indicating the PS data off status in the UE.24.The method of claim 23, wherein the resource status parameter comprises a first value used to indicate that the PS data off status is activated and a second value used to indicate that the PS data off status is deactivated.25.The method of any of claims 18 to 24, wherein the notification service comprises an event exposure notification service, and the notification containing the PS data off status in the UE is included in a notification of event exposure associated with the second network node.26.A first network node, comprising:an obtaining module, configured to obtain information of a second network node;a subscribing module, configured to subscribe to a notification service of the second network node according to the information of the second network node; anda receiving module, configured to use the notification service of the second network node to receive a notification containing packet switched (PS) data off status in a user equipment (UE) .27.A second network node, comprising:a sending module, configured to send to a first network node a notification containing packet switched (PS) data off status in a user equipment (UE) , wherein the first network node is subscribed to a notification service of the second network node to receive the notification.28.A first network node, comprising:at least one memory configured to store program instructions; andat least one processor configured to execute the program instructions, which cause the at least one processor to execute the method of any of claims 1 to 17.29.A second network node, comprising:at least one memory configured to store program instructions; andat least one processor configured to execute the program instructions, which cause the at least one processor to execute the method of any of claims 18 to 25.30.A non-transitory machine-readable storage medium having stored thereon instructions that, when executed by a computer, cause the computer to perform the method of any one of claims 1 to 17 or the method of any one of claims 18 to 25.31.A chip, comprising:a processor, configured to call and run a computer program stored in a memory, to cause a device in which the chip is installed to execute the method of any one of claims 1 to 17 or the method of any one of claims 18 to 25.32.A computer readable storage medium, in which a computer program is stored, wherein the computer program causes a computer to execute the method of any one of claims 1 to 17 or the method of any one of claims 18 to 25.33.A computer program product, comprising a computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 17 or the method of any one of claims 18 to 25.34.A computer program, wherein the computer program causes a computer to execute the method of any one of claims 1 to 17 or the method of any one of claims 18 to 25.