CN116170859A - Wireless access method, wireless access device, computer equipment and storage medium - Google Patents
Wireless access method, wireless access device, computer equipment and storage medium Download PDFInfo
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- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W8/00—Network data management
- H04W8/02—Processing of mobility data, e.g. registration information at HLR [Home Location Register] or VLR [Visitor Location Register]; Transfer of mobility data, e.g. between HLR, VLR or external networks
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract
The application provides a wireless access method, a wireless access device, computer equipment and a storage medium, and relates to the technical field of communication. The method comprises the following steps: receiving an access request for terminal equipment sent by a trusted non-3GPP access point TNAP, wherein the access request comprises: identification of TNAP; acquiring a tracking area identifier of TNGF according to the TNAP identifier; and sending a notification message to a network slice auxiliary function NSSF through any AMF in the access and mobility management function AMF set, so that the NSSF selects a target AMF from the AMF set according to the tracking area identification, the target AMF accesses the terminal equipment to a core network through a target access network, and the target access network is an access network formed by target TNGF and TNAP in at least one TNGF. The method and the device can reduce the time delay of the terminal equipment for accessing the 5G core network.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a wireless access method, a wireless access device, a computer device, and a storage medium.
Background
The 5G network architecture supports access to the 5G core network (5G Core network,5GC) not only by a radio access network (Radio Access Network, RAN) defined by the third generation partnership project (3rd Generation Partnership Project,3GPP) standard group, but also by a Trusted non-3GPP access network (Trusted non-3GPP Access Network,TNAN) defined by a non-3GPP standard protocol.
When a Trusted non-3GPP access network through a 5G core network accesses and registers with the 5G core network, a Trusted non-3GPP gateway function (Trusted non-3GPP Gateway Function,TNGF) needs to select an access and mobility management function (Access and Mobility Management Function, AMF) for a service, a tracking area identifier (Tracking Area Identity, TAI) where the Trusted non-3GPP access point (Trusted non-3GPP Access Point,TNAP) is located needs to be acquired.
However, it is not disclosed in the prior art how to send TAIs to the network slice selection function (Network Slice Selection Function, NSSF), resulting in an increased delay of access of the terminal device to the 5G core network.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a wireless access method, a wireless access device, a wireless access computer device and a wireless access storage medium, so that a tracking area identifier is sent to NSSF, and the time delay of a terminal device in accessing a 5G core network is reduced.
In order to achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:
in a first aspect, embodiments of the present application provide a wireless access method applied to any one of at least one trusted non-3GPP gateway function, tnff, of a wireless communication network, the method comprising:
Receiving an access request sent by a trusted non-3 GPP access point TNAP for a terminal device, wherein the access request comprises: identification of the TNAP;
acquiring a tracking area identifier of the TNGF according to the identifier of the TNAP;
sending a notification message to a network slice assistance function NSSF through any one of a set of access and mobility management functions AMFs, the notification message comprising: and the tracking area identifier is used for enabling the NSSF to determine a target TNGF from the at least one TNGF according to the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
Optionally, after the acquiring the tracking area identifier of the TNGF according to the identifier of the TNAP, the method further includes:
a prediction request is sent to a network data analysis function NWDAF, wherein the prediction request comprises the tracking area identification and current time stamp information, and the NWDAF is used for determining timeliness of the tracking area identification by adopting a pre-trained timeliness prediction model according to the tracking area identification and the current time stamp information;
receiving timeliness of the tracking area identifier sent by the NWDAF;
The notification message includes: and a tracking area identifier with the timeliness, so that the NSSF determines the target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier.
Optionally, after the receiving the timeliness of the tracking area identifier sent by the NWDAF, the method further includes:
if the timeliness of the tracking area identification is effective, determining an timeliness range of the tracking area identification;
the notification message includes: a tracking area identification having the aging range such that the NSSF determines the target tnff from the at least one tnff within the aging range of the tracking area identification.
Optionally, before the sending of the notification message to the network slice assistance function NSSF by any AMF of the set of access and mobility management functions AMF, the method further comprises:
transmitting the network slice auxiliary information supported by the TNGF and the network slice auxiliary information requested by the terminal equipment to all AMFs in the AMF set; the network slice assistance information supported by the TNGF and the network slice assistance information requested by the terminal device are used to cause the any AMF to determine the target TNGF from the at least one TNGF.
In a second aspect, an embodiment of the present application further provides a wireless access method, applied to a network data analysis function NWDAF, where the method includes:
receiving a predictive request sent by any one TNGF of at least one trusted non-3 GPP gateway function TNGF of a wireless communication network, wherein the predictive request comprises a tracking area identification and current timestamp information, and the tracking area identification is determined by the TNGF according to an identifier of a TNAP in an access request sent by a trusted non-3 GPP access point TNAP for a terminal device;
determining timeliness of the tracking area identifier by adopting a pre-trained timeliness prediction model according to the tracking area identifier and the current timestamp information;
the timeliness of the tracking area identification is sent to the TNGF, so that the TNGF sends a notification message to a network slice auxiliary function NSSF through any AMF in an access and mobility management function AMF set, and the notification message comprises: and the tracking area identifier with the timeliness is provided, so that the NSSF determines a target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
Optionally, the aging prediction model is obtained by performing model training by using a plurality of sample area identifiers and corresponding historical aging data, and the historical aging data is historical timestamp information and historical aging of the plurality of sample area identifiers.
In a third aspect, embodiments of the present application also provide a wireless access device applied to any one of at least one trusted non-3 GPP gateway function, tnff, of a wireless communication network, the device comprising:
an access request receiving module, configured to receive an access request for a terminal device sent by a trusted non-3 GPP access point TNAP, where the access request includes: identification of the TNAP;
the area identification determining module is used for acquiring the tracking area identification of the TNGF according to the identification of the TNAP;
a notification message sending module, configured to send a notification message to a network slice assistance function NSSF through any AMF in the set of access and mobility management functions AMF, where the notification message includes: and the tracking area identifier is used for enabling the NSSF to determine a target TNGF from the at least one TNGF according to the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
Optionally, after the area identifier determining module, the apparatus further includes:
a prediction request sending module, configured to send a prediction request to a network data analysis function NWDAF, where the prediction request includes the tracking area identifier and current timestamp information, and the NWDAF is configured to determine timeliness of the tracking area identifier by using a pre-trained timeliness prediction model according to the tracking area identifier and the current timestamp information;
the timeliness receiving module is used for receiving timeliness of the tracking area identifier sent by the NWDAF;
the notification message includes: and a tracking area identifier with the timeliness, so that the NSSF determines the target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier.
Optionally, after the time-efficient receiving module, the apparatus further includes:
the aging range determining module is used for determining the aging range of the tracking area identifier if the aging of the tracking area identifier is effective;
the notification message includes: a tracking area identification having the aging range such that the NSSF determines the target tnff from the at least one tnff within the aging range of the tracking area identification.
Optionally, before the notification message sending module, the apparatus further includes:
a slice auxiliary information sending module, configured to send, to all AMFs in the AMF set, the network slice auxiliary information supported by the TNGF and the network slice auxiliary information requested by the terminal device; the network slice assistance information supported by the TNGF and the network slice assistance information requested by the terminal device are used to cause the any AMF to determine the target TNGF from the at least one TNGF.
In a fourth aspect, an embodiment of the present application further provides a wireless access device, applied to a network data analysis function NWDAF, where the device includes:
a prediction request receiving module, configured to receive a prediction request sent by any one of at least one trusted non-3 GPP gateway function, tnff, of a wireless communication network, where the prediction request includes a tracking area identifier and current timestamp information, where the tracking area identifier is determined by the tnff according to an identifier of a terminal device in an access request sent by a trusted non-3 GPP access point, TNAP;
the aging prediction module is used for determining the aging of the tracking area identification by adopting a pre-trained aging prediction model according to the tracking area identification and the current timestamp information;
A timeliness sending module, configured to send timeliness of the tracking area identifier to the TNGF, so that the TNGF sends a notification message to a network slice assistance function NSSF through any AMF in the set of access and mobility management functions AMF, where the notification message includes: and the tracking area identifier with the timeliness is provided, so that the NSSF determines a target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
Optionally, the aging prediction model is obtained by performing model training by using a plurality of sample area identifiers and corresponding historical aging data, and the historical aging data is historical timestamp information and historical aging of the plurality of sample area identifiers.
In a fifth aspect, embodiments of the present application further provide a computer device, including: a processor, a storage medium and a bus, the storage medium storing program instructions executable by the processor, the processor and the storage medium communicating over the bus when the computer device is running, the processor executing the program instructions to perform the steps of the radio access method according to any of the first aspect or to perform the steps of the radio access method according to any of the second aspect.
In a sixth aspect, embodiments of the present application further provide a computer readable storage medium, on which a computer program is stored, which when executed by a processor performs the steps of the radio access method according to any of the first aspect, or performs the steps of the radio access method according to any of the second aspect.
The beneficial effects of this application are:
the application provides a wireless access method, a wireless access device, computer equipment and a wireless access storage medium, wherein a tracking area identifier is sent to NSSF through TNGF, so that NSSF determines a target TNGF according to the tracking area identifier, an AMF accesses terminal equipment to a core network according to a target access network formed by the target TNGF and TNAP, and the time delay of the terminal equipment to access a 5G core network is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a network architecture diagram provided in an embodiment of the present application;
fig. 2 is a flowchart of a wireless access method according to an embodiment of the present application;
fig. 3 is a second flowchart of a wireless access method according to an embodiment of the present application;
fig. 4 is a flowchart of a wireless access method according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a training age prediction model provided in an embodiment of the present application;
fig. 6 is a transaction schematic diagram of a wireless access method according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a wireless access device according to an embodiment of the present application;
fig. 8 is a second schematic structural diagram of a wireless access device according to an embodiment of the present disclosure;
fig. 9 is a schematic diagram of a computer device according to an embodiment of the present application.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention.
Thus, the following detailed description of the embodiments of the present application, as provided in the accompanying drawings, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Furthermore, the terms first, second and the like in the description and in the claims and in the above-described figures, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Before describing the wireless access method, the wireless access device, the computer equipment and the storage medium provided by the embodiment of the application, a network architecture applied by the application is described.
Referring to fig. 1, a network architecture diagram provided in an embodiment of the present application is a network architecture diagram of a terminal device accessing a 5G core network through a trusted non-3 GPP access network TNAN, and as shown in fig. 1, the network architecture includes: terminal equipment (UE), trusted non-3 GPP access point TNAP, trusted non-3 GPP gateway function TNGF, access and mobility management function AMF, network slice assistance function NSSF, network data analysis function NWDAF, session management function SMF, user plane network element function UPF and data network DN.
The TNAP may be a terminal supporting a trusted non-3 GPP protocol, and the TNAP may provide the device with a trusted non-3 GPP gateway function as a TNGF, where the TNAN includes: TNAP and at least one TNGF, and TNAP may be combined with any TNGF to form TNAN.
The interface between the terminal and the AMF is an N1 interface, the interface between the AMF and the TNGF is an N2 interface, the interface between the AMF and the SMF is an N11 interface, the interface between the SMF and the UPF is an N4 interface, the interface between the UPF and the DN is an N6 interface, the interface between the UPF and the TNGF is an N3 interface, the interface between the terminal and the TNAP is a Yt interface, the interface between the TNAP and the TNGF is a Ta interface, and the interface between the terminal and the TNGF is a NWt interface.
It should be understood that the network architecture applied to the embodiments of the present application is merely an exemplary network architecture described from the perspective of a conventional point-to-point architecture and a service architecture, and the network architecture to which the embodiments of the present application are applicable is not limited thereto, and any network architecture capable of implementing the functions of the respective network elements described above is applicable to the embodiments of the present application. It should be understood that the foregoing network elements may communicate through a preset interface, which is not described herein. It should also be understood that the AMF entity, SMF entity, UPF entity, NSSF entity, NWDAF entity may be understood as network elements in the core network for implementing different functions, e.g. may be combined into network slices as required. The core network elements may be independent devices, or may be integrated in the same device to implement different functions, which is not limited in this application.
Based on the network architecture diagram, the embodiment of the application provides a wireless access method, which is applied to any TNGF. Referring to fig. 2, a first flowchart of a wireless access method according to an embodiment of the present application is shown in fig. 2, where the method may include:
s11: receiving an access request sent by TNAP for terminal equipment, wherein the access request comprises: identification of TNAP.
In this embodiment, when the UE determines that it needs to connect to a specified 5G public land mobile network (Public Land Mobile Network, PLMN) via a trusted non-3 GPP access network, the UE determines to support a TNAN connected to this 5G PLMN, and selects the TNAN to initiate a registration procedure for the trusted non-3 GPP access.
Specifically, the UE establishes a layer 2 (L2) connection with the TNAP in the TNAN, the L2 connection being a data link layer connection for providing a reliable communication connection for the UE and the TNAP. The TNAP initiates an extended authentication protocol (ExtensibleAuthentication Protocol, EAP) procedure to the UE based on the L2 connection, the EAP procedure allocates a new Internet protocol (Internet Protocol, IP) address to the UE and requests identity information of the UE, the UE sends a network access identifier (Network Access Identifier, NAI) to the TNAP based on the EAP procedure, the NAI indicating that the UE requests a "5G connection (5G connectivity)" to a particular PLMN, the NAI including network slice selection assistance information (Network Slice Selection Assistance Information, NSSAI) and the IP address requested by the UE.
The NAI triggers the TNAP to select the TNGF and sends an access request to the selected TNGF, such that the TNGF acts as a proxy, the access request may be an AAA (Authentication, authorization, and accounting: authentication, authorization, and accounting) request, the request message including a TNAP identifier and a nsai requested by the UE, the TNAP identifier being used to represent location information of the TNAP.
S12: and acquiring the tracking area identification of the TNGF according to the identification of the TNAP.
In this embodiment, there are multiple TNAPs that provide a trusted non-3 GPP gateway function to a device as a TNGF, where the multiple TNAPs are located in different tracking areas, and after the TNGF receives an access request sent by the TNAP, a Tracking Area Identifier (TAI) of a tracking area where the TNAP is located is determined from tracking areas corresponding to the multiple TNAPs according to identifiers of the TNAPs.
S13: sending a notification message to the NSSF through any one of the AMFs in the AMF set, the notification message including: and tracking the area identifier, so that the NSSF determines a target TNGF from at least one TNGF according to the tracking area identifier, and any AMF accesses the terminal equipment into a core network through a target access network, wherein the target access network is an access network formed by the target TNGF and the TNAP.
In this embodiment, the tnff sends a broadcast message to a plurality of AMFs in the AMF set, where the broadcast message includes a TAI, and after the plurality of AMFs receive the broadcast message, any one of the AMFs is randomly selected to send a notification message to the NSSF, where the notification message carries the TAI, and the NSSF determines, according to the received TAI, network slice auxiliary information supported by each tnff according to at least one tnff corresponding to the TAI, and determines a target tnff according to the network slice auxiliary information supported by each tnff.
And selecting a target AMF with the position closest to the tracking area corresponding to the TAI from the AMF set, providing the function of accessing the core network for the UE through the target access network by the target AMF, and creating a PDU session for the UE through the target AMF, the SMF and the UPF so that the UE can send communication data to the data network DN based on the PDU session.
In some embodiments, the determining manner of the target TNGF may be that the TNAP determines, according to the NSSAI requested by the UE and the NSSAIs supported by each of the TNGFs, that the TNGF including the NSSAI requested by the UE is the target TNGF.
In other embodiments, the determination of the target TNGF may be further:
before S13, transmitting network slice assistance information supported by the TNGF and network slice assistance information requested by the terminal device to all AMFs in the AMF set; the network slice assistance information supported by the TNGF and the network slice assistance information requested by the terminal device are used to cause any AMF to determine a target TNGF from the at least one TNGF.
In this embodiment, the TNAP does not select a target TNGF from at least one TNGF in advance, but selects one TNGF arbitrarily to send an access request, in which case, if the NSSAI supported by the selected TNGF does not include the NSSAI requested by the UE, it is necessary to reselect the TNGF.
Specifically, the TNGF sends a broadcast message to the AMF set, where the broadcast message includes: after the NSSF determines the target AMF from the multiple AMFs, the target AMF determines whether the tnff needs to be reselected according to the NSSAI supported by the tnff and the NSSAI requested by the UE, if the NSSAI supported by the tnff includes the NSSAI requested by the UE, the NSSAI supported by the tnff is determined to be the target tnff, otherwise, the target tnff is selected from other tnffs. In addition, the target AMF needs to subscribe the network slice corresponding to the nsai for the UE according to the nsai requested by the UE, so that the PDU session of the UE can transmit network data by using the resources of the subscribed network slice.
The NSSF may determine the target AMF from the multiple AMFs by:
the TNGF sends the supported TAI to the AMF, the AMF sends the TNGF supported TAI and the TNGF supported NSSAI, the NSSAI requested by the UE to the NSSF, the NSSF returns the requested slice of the UE based on the TNGF supported NSSAI and the NSSAI requested by the UE, and if the AMF cannot service the slice, AMF reselection is initiated based on the slice information to determine the target AMF that can service the slice.
According to the wireless access method provided by the embodiment, the tracking area identifier is sent to the NSSF through the TNGF, so that the NSSF determines the target TNGF according to the tracking area identifier, the AMF accesses the terminal equipment to the core network according to the target access network consisting of the target TNGF and the TNAP, and the time delay of the terminal equipment to the 5G core network is reduced.
In a possible implementation manner, please refer to fig. 3, which is a second flowchart of a wireless access method provided in an embodiment of the present application, as shown in fig. 3, after S12 obtains a tracking area identifier of a TNGF according to an identifier of a TNAP, the method may further include:
s21: and sending a prediction request to the NWDAF, wherein the prediction request comprises the tracking area identification and the current time stamp information, and the NWDAF is used for determining the timeliness of the tracking area identification by adopting a pre-trained timeliness prediction model according to the tracking area identification and the current time stamp information.
In this embodiment, an aging prediction model obtained by training in advance is deployed in the NWDAF, which is used for judging the aging of the tracking area identifier, where the aging of the tracking area identifier is used for indicating whether the network element in the tracking area corresponding to the tracking area identifier is effective at the time corresponding to the current timestamp information.
After determining the TAI, the TNGF sends a prediction request to the NWDAF, wherein the prediction request comprises the TAI and current time stamp information, the NWDAF adopts an aging prediction model, determines the timeliness of the tracking area identification according to the TAI and the current time stamp information, and the output result is valid or invalid.
S22: and receiving the timeliness of the tracking area identification sent by the NWDAF.
In this embodiment, the tnff receives the timeliness information of the TAI returned by the NWDAF, and the tnff sends a notification message to the NSSF through the AMF set, where the notification message includes: a TAI having timeliness such that the NSSF determines the target tnff from the at least one tnff based on the timeliness of the TAI. If the timeliness of the TAI is invalid, the TNGF cannot provide the access function, the NSSF cannot determine the target TNGF from the at least one TNGF, and the TNGF needs to be re-requested to send the TAI; if the timeliness of the TAI is valid, the NSSF may determine the target tnff from the at least one tnff.
In some embodiments, after the step S22 of receiving the timeliness of the NWDAF transmission tracking area identifier, the method may further include:
if the timeliness of the tracking area identification is effective, determining an timeliness range of the tracking area identification; the notification message includes: a tracking area identification having an aging range such that the NSSF determines a target tnff from the at least one tnff within the aging range of the tracking area identification.
In this embodiment, after receiving the aging information of the TAI, the tnff sets an aging range for the TAI, where the aging range is used to indicate that the TAI is only valid in the aging range, and is invalid after exceeding the aging range. Wherein the aging range may be a time period of a preset length.
The TNGF sends a notification message to the NSSF via the AMF set, the notification message comprising: a tracking area identification having an aging range such that the NSSF determines a target tnff from the at least one tnff at the aging range of the tracking area identification. Wherein, if the aging range of the TAI is exceeded, the NSSF cannot determine the target tnff from the at least one tnff.
According to the wireless access method provided by the embodiment, the timeliness and the timeliness range of the TAI are determined by using the timeliness prediction model, so that NSSF can select a target TNGF to provide an access function for the UE when the TAI is effective, thereby subscribing the network slice for the UE, improving the efficiency of subscribing the network slice flow, improving the response speed of the UE accessing the core network, and ensuring the information security.
Based on the network architecture diagram, the embodiment of the application provides a wireless access method, which is applied to NWDAF. Referring to fig. 4, a third flowchart of a wireless access method according to an embodiment of the present application is shown in fig. 4, where the method may include:
s31: a predictive request sent by any one of at least one TNGF of the wireless communication network is received, the predictive request including a tracking area identity and current timestamp information, the tracking area identity being determined by the TNGF from an identifier of a TNAP in an access request sent by the TNAP to the end device.
In this embodiment, the UE establishes a layer 2 (L2) connection with a TNAP in the TNAN, the TNAP initiates an EAP procedure to the UE based on the L2 connection, the UE sends a NAI to the TNAP based on the EAP procedure, the NAI triggers the TNAP to select the TNGF and sends an access request to the selected TNGF, the TNGF obtains the TAI of the TNGF according to the identity of the TNAP and sends a prediction request to the NWDAF, and the specific process may refer to S11-S12 described above, which is not repeated herein.
S32: and determining timeliness of the tracking area identification by adopting a pre-trained timeliness prediction model according to the tracking area identification and the current timestamp information.
In this embodiment, an aging prediction model obtained by training in advance is deployed in the NWDAF, which is used for judging the aging of the tracking area identifier, where the aging of the tracking area identifier is used for indicating whether the network element in the tracking area corresponding to the tracking area identifier is effective at the time corresponding to the current timestamp information. After the NWDAF receives the prediction request, determining the timeliness of the tracking area identifier according to the TAI and the current timestamp information, and outputting a result that the tracking area identifier is valid or invalid.
In some embodiments, the aging prediction model is model trained using a plurality of sample area identifiers and corresponding historical aging data, where the historical aging data is historical timestamp information and historical aging of the plurality of sample area identifiers.
Referring to fig. 5, for a structure diagram of a training aging prediction model provided in an embodiment of the present application, as shown in fig. 5, the structure of the training aging prediction model includes: the system comprises a data preprocessing module, a model training module and a result output module.
The data preprocessing model provides a data preprocessing function, and through acquiring historical aging data of a sample TAI from a third party, data segmentation and missing value processing are carried out on a sample area identifier and the historical aging data, wherein the missing value processing is used for acquiring complete time, wherein data of missing sample TAI and historical timestamp information are deleted, 0 supplementing operation is carried out on the data of missing historical aging, and the historical aging of the sample TAI is indicated to be invalid.
For example, please refer to table 1, which is an exemplary table of historical aging data for TAI.
Table 1 example table of historical aging data for TAI
| Parameter name | Annotating |
| Time(YYMMDD H:I:S) | Historical timestamp information |
| TAI | Tracking area identification |
| TAI_expire | Aging of TAI |
The predictive network module includes: the aging prediction model to be trained comprises an input layer, a convolution layer, an activation function layer, a pooling layer and an output layer. The specific network hierarchical structure information is shown in table 2, please refer to table 2, and is the hierarchical structure information of the aging prediction model, as shown in table 2, the whole network is divided into three layers, the first layer of convolution layer comprises a convolution layer and an excitation function layer, the second layer of convolution layer comprises a convolution layer and an excitation function layer, and the third layer of network comprises a convolution layer, an excitation function layer and a pooling layer.
Assuming that the input data is X, in the input layer, the input size is (60, 60), three dimensions (timestamp information, TAI age) of the input are taken as three channels of the input layer, the input layer size is (60, 60, 3), the first layer convolution layer conv1_1 is (60, 60, 10), the second layer convolution layer conv2_1 is (28, 28, 10), the third layer convolution layer conv3_1 is (26, 26, 10), w1×x1+w2×x2+w3×x3=y1 is obtained through the convolution layers, wherein X1 represents the first channel data (time) in the input layer, X2 represents the second channel data (reachable state) in the input layer, X3 represents the third channel data (covered state) in the input layer, W1 represents the first channel convolution weight of the first layer, W2 represents the first channel convolution weight of the first layer, W3 represents the first channel convolution weight of the first layer, w1+w2+w2=w3 is obtained through the convolution layer, and lu 1 is output by an excitation vector of the output vector of lu 1_is obtained through the output vector of lu 1.
Table 2 hierarchical information of age prediction model
The result output module comprises: the model optimization method comprises the steps of outputting a prediction result, multiplexing data and performing model iteration optimization, wherein the prediction result is output and used for sending prediction timeliness to TNGF, the data multiplexing is used for indicating that sample data can be multiplexed to perform multi-round training on the model, and the model iteration optimization is used for performing parameter optimization on the model in training.
S33: the timeliness of the tracking area identification is sent to the TNGF, causing the TNGF to send a notification message to the NSSF via any AMF of the set of AMFs.
In this embodiment, after the NWDAF sends the timeliness information of the TAI to the TNGF and the TNGF receives the timeliness information of the TAI returned by the NWDAF, the NWDAF sends a notification message to the NSSF through any AMF in the AMF set, where the notification message includes: a TAI having timeliness such that the NSSF determines the target tnff from the at least one tnff based on the timeliness of the TAI. If the timeliness of the TAI is invalid, the NSSF cannot determine the target tnff from the at least one tnff, and further needs to re-request the tnff to send the TAI; if the timeliness of the TAI is valid, the NSSF may determine the target tnff from the at least one tnff.
According to the wireless access method provided by the embodiment, the timeliness and the timeliness range of the TAI are determined by using the timeliness prediction model, so that NSSF can select a target TNGF to provide an access function for the UE when the TAI is effective, thereby subscribing the network slice for the UE, improving the efficiency of subscribing the network slice flow, improving the response speed of the UE accessing the core network, and ensuring the information security.
Referring to fig. 6, a transaction schematic diagram of a wireless access method according to an embodiment of the present application, as shown in fig. 6, the interaction process may include:
S101: the UE sends the L2 connection procedure to the TNAP.
S102: the TNAP sends an AAA request message to the TNGF.
S103: TNGF sends a prediction request to NWDAF, which includes TAI.
S104: NWDAF returns the prediction result.
S105: the TNGF sends a broadcast message to the AMF set, the broadcast message comprising: NSSAI supported by TNGF, UE-requested NSSAI, and TAI.
S106: any one of the AMFs in the AMF set sends NSSAI supported by tnff, UE-requested NSSAI, and TAI to the NSSF.
S107: the NSSF returns an acknowledgement.
If the AMF does not receive the acknowledgement message returned by the NSSF, or does not receive the acknowledgement message after the aging expires, S103-S107 are executed again until the acknowledgement message is received.
On the basis of the above embodiments, the embodiments of the present application further provide a wireless access device, which is applied to any one of at least one trusted non-3 GPP gateway function tnffs of a wireless communication network. Referring to fig. 7, a first structural diagram of a wireless access device according to an embodiment of the present application is shown in fig. 7, where the device may include:
an access request receiving module 11, configured to receive an access request for a terminal device sent by a trusted non-3 GPP access point TNAP, where the access request includes: identification of TNAP;
A region identifier determining module 12, configured to obtain a tracking region identifier of the TNGF according to the identifier of the TNAP;
a notification message sending module 13, configured to send a notification message to a network slice assistance function NSSF through any AMF in the set of access and mobility management functions AMF, where the notification message includes: and tracking the area identifier, so that the NSSF determines a target TNGF from at least one TNGF according to the tracking area identifier, and any AMF accesses the terminal equipment into a core network through a target access network, wherein the target access network is an access network formed by the target TNGF and the TNAP.
Optionally, after the area identifier determining module 12, the apparatus may further include:
the prediction request sending module is used for sending a prediction request to the network data analysis function NWDAF, wherein the prediction request comprises a tracking area identifier and current timestamp information, and the NWDAF is used for determining timeliness of the tracking area identifier by adopting a pre-trained timeliness prediction model according to the tracking area identifier and the current timestamp information;
the timeliness receiving module is used for receiving timeliness of the tracking area identification sent by the NWDAF;
the notification message includes: the tracking area identification is time-efficient such that the NSSF determines the target tnff from the at least one tnff based on the time-efficient of the tracking area identification.
Optionally, after the time-efficient receiving module, the apparatus may further include:
the aging range determining module is used for determining the aging range of the tracking area identifier if the aging of the tracking area identifier is effective;
the notification message includes: a tracking area identification having an aging range such that the NSSF determines a target tnff from the at least one tnff within the aging range of the tracking area identification.
Optionally, before notifying the message sending module 13, the apparatus may further include:
the slice auxiliary information sending module is used for sending network slice auxiliary information supported by TNGF and network slice auxiliary information requested by the terminal equipment to all AMFs in the AMF set; the network slice assistance information supported by the TNGF and the network slice assistance information requested by the terminal device are used to cause any AMF to determine a target TNGF from the at least one TNGF.
On the basis of the above embodiments, the embodiments of the present application further provide a wireless access device, which is applied to the network data analysis function NWDAF. Referring to fig. 8, a second structural diagram of a wireless access device provided in an embodiment of the present application is shown in fig. 8, where the device may include:
a prediction request receiving module 31, configured to receive a prediction request sent by any one of at least one trusted non-3 GPP gateway function TNGF of the wireless communication network, where the prediction request includes a tracking area identifier and current timestamp information, and the tracking area identifier is determined by the TNGF according to an identifier of a TNAP in an access request for the terminal device sent by the trusted non-3 GPP access point TNAP;
The aging prediction module 32 is configured to determine the aging of the tracking area identifier by using a pre-trained aging prediction model according to the tracking area identifier and the current timestamp information;
a timeliness sending module 33, configured to send timeliness of the tracking area identifier to the tnff, so that the tnff sends a notification message to the network slice assistance function NSSF through any AMF in the set of access and mobility management functions AMF, where the notification message includes: and the NSSF determines a target TNGF from at least one TNGF according to the timeliness of the tracking area identification, any AMF accesses the terminal equipment into a core network through a target access network, and the target access network is an access network formed by the target TNGF and TNAP.
Optionally, the aging prediction model is obtained by performing model training by using a plurality of sample area identifiers and corresponding historical aging data, where the historical aging data is historical timestamp information and historical aging of the plurality of sample area identifiers.
The foregoing apparatus is used for executing the method provided in the foregoing embodiment, and its implementation principle and technical effects are similar, and are not described herein again.
The above modules may be one or more integrated circuits configured to implement the above methods, for example: one or more application specific integrated circuits (Application Specific Integrated Circuit, abbreviated as ASICs), or one or more microprocessors, or one or more field programmable gate arrays (Field Programmable Gate Array, abbreviated as FPGAs), etc. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general-purpose processor, such as a central processing unit (Central Processing Unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
Referring to fig. 9, a schematic diagram of a computer device provided in an embodiment of the present application, as shown in fig. 9, the computer device 100 includes: processor 101, storage medium 102, and a bus, storage medium 102 storing program instructions executable by processor 101, processor 101 and storage medium 102 communicating over the bus when computer device 100 is running, processor 101 executing the program instructions to perform the method embodiments described above for TNGF or for NWDAF. The specific implementation manner and the technical effect are similar, and are not repeated here.
Optionally, the present invention further provides a computer readable storage medium, on which a computer program is stored, which when executed by a processor performs the above-described method embodiment applied to TNGF or performs the above-described method embodiment applied to NWDAF. The specific implementation manner and the technical effect are similar, and are not repeated here.
In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or units, which may be in electrical, mechanical or other form.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in hardware plus software functional units.
The integrated units implemented in the form of software functional units described above may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some of the steps of the methods according to the embodiments of the invention. And the aforementioned storage medium includes: u disk, mobile hard disk, read-Only Memory (ROM), random access Memory (Random Access Memory, RAM), magnetic disk or optical disk, etc.
The foregoing is merely illustrative of embodiments of the present invention, and the present invention is not limited thereto, and any changes or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and the present invention is intended to be covered by the present invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A wireless access method, characterized by any one of at least one trusted non-3 GPP gateway function, tnff, applied to a wireless communication network, the method comprising:
receiving an access request sent by a trusted non-3 GPP access point TNAP for a terminal device, wherein the access request comprises: identification of the TNAP;
acquiring a tracking area identifier of the TNGF according to the identifier of the TNAP;
sending a notification message to a network slice assistance function NSSF through any one of a set of access and mobility management functions AMFs, the notification message comprising: and the tracking area identifier is used for enabling the NSSF to determine a target TNGF from the at least one TNGF according to the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
2. The method of claim 1, wherein after the obtaining the tracking area identification of the TNGF based on the identification of the TNAP, the method further comprises:
a prediction request is sent to a network data analysis function NWDAF, wherein the prediction request comprises the tracking area identification and current time stamp information, and the NWDAF is used for determining timeliness of the tracking area identification by adopting a pre-trained timeliness prediction model according to the tracking area identification and the current time stamp information;
receiving timeliness of the tracking area identifier sent by the NWDAF;
the notification message includes: and a tracking area identifier with the timeliness, so that the NSSF determines the target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier.
3. The method of claim 2, wherein after the receiving the time-lapse of the tracking area identification transmitted by the NWDAF, the method further comprises:
if the timeliness of the tracking area identification is effective, determining an timeliness range of the tracking area identification;
the notification message includes: a tracking area identification having the aging range such that the NSSF determines the target tnff from the at least one tnff within the aging range of the tracking area identification.
4. The method of claim 1, wherein before the sending of the notification message to the network slice assistance function NSSF by any AMF of the set of access and mobility management functions AMF, the method further comprises:
transmitting the network slice auxiliary information supported by the TNGF and the network slice auxiliary information requested by the terminal equipment to all AMFs in the AMF set; the network slice assistance information supported by the TNGF and the network slice assistance information requested by the terminal device are used to cause the any AMF to determine the target TNGF from the at least one TNGF.
5. A wireless access method, applied to a network data analysis function NWDAF, the method comprising:
receiving a predictive request sent by any one TNGF of at least one trusted non-3 GPP gateway function TNGF of a wireless communication network, wherein the predictive request comprises a tracking area identification and current timestamp information, and the tracking area identification is determined by the TNGF according to an identifier of a TNAP in an access request sent by a trusted non-3 GPP access point TNAP for a terminal device;
determining timeliness of the tracking area identifier by adopting a pre-trained timeliness prediction model according to the tracking area identifier and the current timestamp information;
The timeliness of the tracking area identification is sent to the TNGF, so that the TNGF sends a notification message to a network slice auxiliary function NSSF through any AMF in an access and mobility management function AMF set, and the notification message comprises: and the tracking area identifier with the timeliness is provided, so that the NSSF determines a target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
6. The method of claim 5, wherein the age prediction model is model trained using a plurality of sample area identifiers and corresponding historical age data, the historical age data being historical timestamp information and historical age of the plurality of sample area identifiers.
7. A wireless access apparatus, characterized by any one of at least one trusted non-3 GPP gateway function, tnff, applied to a wireless communication network, the apparatus comprising:
an access request receiving module, configured to receive an access request for a terminal device sent by a trusted non-3 GPP access point TNAP, where the access request includes: identification of the TNAP;
The area identification determining module is used for acquiring the tracking area identification of the TNGF according to the identification of the TNAP;
a notification message sending module, configured to send a notification message to a network slice assistance function NSSF through any AMF in the set of access and mobility management functions AMF, where the notification message includes: and the tracking area identifier is used for enabling the NSSF to determine a target TNGF from the at least one TNGF according to the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
8. A wireless access device, characterized in that it is applied to a network data analysis function NWDAF, said device comprising:
a prediction request receiving module, configured to receive a prediction request sent by any one of at least one trusted non-3 GPP gateway function, tnff, of a wireless communication network, where the prediction request includes a tracking area identifier and current timestamp information, where the tracking area identifier is determined by the tnff according to an identifier of a terminal device in an access request sent by a trusted non-3 GPP access point, TNAP;
the aging prediction module is used for determining the aging of the tracking area identification by adopting a pre-trained aging prediction model according to the tracking area identification and the current timestamp information;
A timeliness sending module, configured to send timeliness of the tracking area identifier to the TNGF, so that the TNGF sends a notification message to a network slice assistance function NSSF through any AMF in the set of access and mobility management functions AMF, where the notification message includes: and the tracking area identifier with the timeliness is provided, so that the NSSF determines a target TNGF from the at least one TNGF according to the timeliness of the tracking area identifier, the terminal equipment is accessed to a core network through a target access network by any AMF, and the target access network is an access network formed by the target TNGF and the TNAP.
9. A computer device, comprising: a processor, a storage medium and a bus, the storage medium storing program instructions executable by the processor, the processor and the storage medium communicating via the bus when the computer device is running, the processor executing the program instructions to perform the steps of the radio access method according to any one of claims 1 to 4 or to perform the steps of the radio access method according to claim 5 or 6.
10. A computer readable storage medium, characterized in that the storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the radio access method according to any of claims 1 to 4 or performs the steps of the radio access method according to claim 5 or 6.
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