CN117041938A - Satellite-based roaming call method, system and storage medium - Google Patents

Satellite-based roaming call method, system and storage medium Download PDF

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Publication number
CN117041938A
CN117041938A CN202310989734.6A CN202310989734A CN117041938A CN 117041938 A CN117041938 A CN 117041938A CN 202310989734 A CN202310989734 A CN 202310989734A CN 117041938 A CN117041938 A CN 117041938A
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China
Prior art keywords
network element
function network
management function
session
session management
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CN202310989734.6A
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Chinese (zh)
Inventor
黄志聪
谢涵
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Guangzhou Aipu Road Network Technology Co Ltd
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Guangzhou Aipu Road Network Technology Co Ltd
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Priority to CN202310989734.6A priority Critical patent/CN117041938A/en
Publication of CN117041938A publication Critical patent/CN117041938A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/26—Network addressing or numbering for mobility support
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/185—Space-based or airborne stations; Stations for satellite systems
    • H04B7/18521—Systems of inter linked satellites, i.e. inter satellite service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0016—Hand-off preparation specially adapted for end-to-end data sessions
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • 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
    • H04W8/08—Mobility data transfer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/18—Processing of user or subscriber data, e.g. subscribed services, user preferences or user profiles; Transfer of user or subscriber data
    • H04W8/20—Transfer of user or subscriber data

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Databases & Information Systems (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The application discloses a roaming call method, a roaming call system and a storage medium based on satellites, which can be widely applied to the technical field of satellite communication. When a target terminal accesses a visiting place network through a satellite, determining that an AMF receives a protocol data unit session establishment request of the target terminal, requesting to establish session management context session information to a V-SMF so as to establish an N4 session between the V-SMF and the V-UPF, then after the V-SMF requests to access a home session management function network element, applying subscription data of the target terminal to the unified data management function network element by the H-SMF, acquiring policy information, transmitting the policy information to the visiting place user plane function network element, establishing a first data packet detection rule corresponding to a 5G virtual network group according to the subscription data, and performing roaming call of the target terminal according to the first data packet detection rule, thereby realizing normal communication after the target terminal leaves the home place.

Description

Satellite-based roaming call method, system and storage medium
Technical Field
The application relates to the technical field of satellite communication, in particular to a roaming call method, a roaming call system and a storage medium based on satellites.
Background
In a 5G mobile communication network, when a mobile terminal of a target object accesses the internet, the mobile terminal needs to connect to a home network through a home base station of the mobile terminal, so as to meet the requirement of accessing the internet. In the communication access mode, once the mobile terminal leaves the home location, the mobile terminal cannot be normally connected with the home location network, and therefore the use requirement of a target object in actual life cannot be met.
Disclosure of Invention
The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a roaming call method, a roaming call system and a storage medium based on satellites, which can solve the problem of access restriction of a regional network.
In one aspect, an embodiment of the present application provides a satellite-based roaming call method, including the following steps:
when a target terminal accesses a visiting place network through a satellite and an access and mobility management function network element receives a protocol data unit session establishment request of the target terminal, the access and mobility management function network element requests to create session management context session information to the visiting place session management function network element so as to establish an N4 session between the visiting place session management function network element and a visiting place user plane function network element;
the visit place session management function network element requests to visit the home place session management function network element, and the home place session management function network element applies the subscription data of the target terminal to the unified data management function network element, wherein the subscription data comprises virtual network group data;
after the attribution session management function network element acquires the subscription data, acquiring policy information from an attribution policy control function network element;
the home session management function network element sends the subscription data and the policy information to the visiting session management function network element;
the visiting place session management function network element transmits the strategy information to the visiting place user plane function network element, and establishes a first data packet detection rule corresponding to a 5G virtual network group according to the subscription data;
and the visiting place user plane function network element carries out roaming call of the target terminal according to the first data packet detection rule.
In some embodiments, the access and mobility management function network element requesting creation of session management context session information from the visited session management function network element to establish an N4 session between the visited session management function network element and the visited user plane function network element, comprising:
the access and mobility management function network element sends a creation request of session management context session information to the visiting place session management function network element, wherein the session management context session information comprises parameter information of the home place session management function network element;
the access and mobility management function network element receives a creation response of the session management context session information returned by the visiting place session management function network element, and determines that the visiting place session management function network element completes the creation process of the session management context session information;
the visited place session management function network element establishes an N4 session to the visited place user plane function network element.
In some embodiments, the visiting place session management function network element requests to visit the home place session management function network element, and the home place session management function network element applies for subscription data of the target terminal to the unified data management function network element, including:
the visiting place session management function network element sends a protocol data unit session establishment request of the target terminal to the home place session management function network element;
the home session management function network element sends a search request of subscription data to the unified data management function network element so that the unified data management function network element performs subscription data search.
In some embodiments, the visiting place user plane function network element performs a roaming call of the target terminal according to the first data packet detection rule, including:
the visiting place user plane function network element judges that the first data packet detection rule belongs to an internal rule of a 5G virtual network group, determines that the data message has session information stored with a destination address, and routes the data message to the destination address.
In some embodiments, the method for determining that the first packet detection rule belongs to a 5G virtual network group internal rule by the visited user plane function network element, determining that session information storing a destination address exists in the data packet, and routing the data packet to the destination address includes:
when a visiting place user plane function network element receives a data message containing uplink flow of the target terminal, matching a first data packet detection rule with priority meeting preset requirements according to N4 session information of the target terminal;
determining that the first data packet detection rule belongs to an internal rule of a 5G virtual network group, forwarding the data packet to a classifier of a visiting place user plane function network element, and matching a second data packet detection rule of a dialogue terminal for the 5G virtual network group;
and inquiring N4 session information of the dialogue terminal according to the second data packet detection rule, and routing the data message to the dialogue terminal.
In some embodiments, the first packet detection rule according to the N4 session information matching priority of the target terminal meets a preset requirement includes:
according to the N4 session information of the target terminal, matching the available data packet detection rule with the highest priority as a first data packet detection rule;
and acquiring a packet forwarding rule corresponding to the first data packet detection rule, wherein a Destination Interface field in the packet forwarding rule is used for characterizing the 5G virtual network group processed inside the visiting place user plane function network element to obtain a data forwarding interface.
In some embodiments, the method further comprises the steps of:
and discarding the data message according to the available data packet detection rule of the highest priority which is not matched with the N4 session information of the target terminal.
In some embodiments, the parameter information of the home session management function network element includes hSmfId, hSmfUri and Snssai, where the hSmfId is used to characterize an identity of the home session management function network element, the hSmfUri is used to characterize a uniform resource identifier that invokes a service session interface of the home session management function network element, and the Snssai is used to characterize the requested slice information.
In another aspect, an embodiment of the present application provides a roaming call system based on a satellite, including:
at least one memory for storing a program;
at least one processor configured to load the program to perform the satellite-based roaming call method.
In another aspect, an embodiment of the present application provides a storage medium having stored therein a computer executable program for implementing the satellite-based roaming call method when executed by a processor.
The embodiment of the application has the following beneficial effects:
when a target terminal accesses a visiting place network through a satellite, a mobility management function network element is determined to receive a protocol data unit session establishment request of the target terminal, the access and mobility management function network element requests to establish session management context session information to the visiting place session management function network element, so as to establish an N4 session between the visiting place session management function network element and the visiting place user plane function network element, then after the visiting place session management function network element requests to access a home place session management function network element, the home place session management function network element applies to a unified data management function network element for subscription data of the target terminal, and a home place policy control function network element obtains policy information, issues the policy information to the visiting place user plane function network element, establishes a first data packet detection rule corresponding to a 5G virtual network group according to the subscription data, and the visiting place user plane function network element carries out roaming call of the target terminal according to the first data packet detection rule, so that after leaving a home place, the target terminal can still normally communicate, the problem of access limitation is solved, and the use requirement of the target terminal in actual life is met.
Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.
Drawings
The application is further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a flow chart of a method for satellite-based roaming call in accordance with an embodiment of the present application;
fig. 2 is a schematic diagram of network element interaction according to an embodiment of the present application;
fig. 3 is a flow chart of a locally enabled exchange of VN Group according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.
In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
In the description of the present application, the meaning of a number is one or more, the meaning of a number is two or more, and greater than, less than, exceeding, etc. are understood to exclude the present number, and the meaning of a number is understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.
In the description of the present application, the descriptions of the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Before describing particular embodiments of the present application, the terms referred to herein will be explained as follows:
AMF: english is called Access and Mobility Management Function, chinese is interpreted as access and mobility management function network elements, and the functions include connection management, reachability management, mobility management, access authorization and the like.
UPF: english is fully called User plane Function, chinese is interpreted as a user plane functional network element whose functions include session points where external PDUs are interconnected with the data network, packet routing and forwarding, e.g. supporting an uplink classifier to route traffic to an instance of the data network.
SMF: english is fully named Session Management Function and chinese is interpreted as a session management function network element whose functions include session management, such as session establishment, modification and release, etc., including maintenance of channels between UPF and AN nodes, etc.
V-SMF: english is called as visual-Session Managerment Function, chinese is interpreted as a visiting place conversation management function network element.
H-SMF: english is called Home-Session Managerment Function, chinese is interpreted as Home session management function network element.
V-UPF: english is called as visual-User plane Function, chinese is interpreted as visiting place user plane function network element.
H-UPF: english is called Home-User plane Function, chinese is interpreted as Home user plane function network element.
H-PCF: english is called Home-Policy Control Function, chinese is interpreted as Home policy control function network element.
UE: english is interpreted as User Equipment and Chinese is interpreted as User terminal. The user terminal may be a cell phone, tablet computer, notebook computer or other device.
GNB: english is interpreted as next generation node B and Chinese is interpreted as 5G base station.
UDM: english is interpreted as Unified Data Management Function, chinese is interpreted as unified data management function network element.
SM: english is called Session Managerment in full, chinese is interpreted as session management.
URI: english is called Uniform Resource Identifier and Chinese is interpreted as a uniform resource identifier.
PDU: english is called Protocol Data Unit and Chinese is interpreted as a protocol data unit.
PSA: PDU session anchor.
N1: the N1 interface is a signaling interface between the terminal and the AMF.
N2: the N2 interface is a signaling plane interface between the (R) AN and the AMF.
And N3: the N3 interface is a user plane interface between the (R) AN and the UPF.
N4: interface between SMF and UPF.
N4 session: for controlling the functions of the UPF, the SMF may create, alter, and delete N4 session contexts in the UPF.
N9: I-UPF and PSA interface. In a mobile scene, an I-UPF is inserted between the UE and the PSA to forward traffic.
N19: interface between two PSAs. In a 5G LAN scenario, the user plane interface between two PSAs directly routes traffic between different PDU sessions without using an N6 interface.
AUSF: english is called Authentication Server Function, chinese is interpreted as authentication service function.
NRF: english is called Network Repository Function, chinese is interpreted as network storage function.
5G LAN: english is fully called 5G Local Area Network, chinese is interpreted as 5G local network.
5G VN Group: english is fully called 5G Virtual Netwok Group, chinese is interpreted as 5G virtual network group.
PDR: english is called Packet Detection Information, chinese is interpreted as a data packet detection rule.
FAR: english is called Forwarding Action Rule, chinese is interpreted as packet forwarding rule.
QER: english is called QoS Enforcement Rule and Chinese is interpreted as QoS enforcement rules.
SUPI: the user's 5G globally unique user permanent identifier.
Based on the above term explanation, the embodiment of the application provides a roaming call method based on a satellite, which is based on the 5G LAN function to realize the roaming call.
It will be appreciated that referring to fig. 1, an embodiment of the present application provides a satellite-based roaming call method, including, but not limited to, the following steps:
step S110, when a target terminal accesses a visiting place network through a satellite and an access and mobility management function network element (AMF) receives a Protocol Data Unit (PDU) session establishment request of the target terminal, the access and mobility management function network element (AMF) requests to create session management context session information to the visiting place session management function network element (V-SMF) so as to establish an N4 session between the visiting place session management function network element (V-SMF) and a visiting place user plane function network element (V-UPF);
step S120, a visiting place session management function network element (V-SMF) requests to visit a home place session management function network element (H-SMF), and the home place session management function network element (H-SMF) applies subscription data of a target terminal to a unified data management function network element (UDM), wherein the subscription data comprises virtual network group data;
step S130, after the attribution session management function network element (H-SMF) acquires the subscription data, acquiring policy information from the attribution policy control function network element (H-PCF);
step S140, the home session management function network element (H-SMF) sends the subscription data and the policy information to the visiting session management function network element (V-SMF);
step S150, a visiting place session management function network element (V-SMF) transmits policy information to a visiting place user plane function network element (V-UPF), and establishes a first data packet detection rule corresponding to the 5G virtual network group according to subscription data;
step S160, the visiting place user plane function network element (V-UPF) carries out the roaming call of the target terminal according to the first data packet detection rule.
In the embodiment of the application, the AMF requests to the V-SMF to create session management context session information to establish an N4 session between the V-SMF and the V-UPF, and the process can be realized by the following ways:
the AMF sends a creation request of session management context session information to the V-SMF, wherein the session management context session information comprises parameter information of the H-SMF; the parameter information of the H-SMF comprises hSmfId, hSmfUri and Snssai, and the hSmfId is used for representing the identity of the H-SMF; the hSmfUri is used for representing a Uniform Resource Identifier (URI) for calling the H-SMF service call interface; the Snssai is used to characterize the requested slice information, and if the requested V-SMF does not contain the slice capability, the AMF needs to request the NSSF to find a V-SMF that satisfies the slice capability.
The AMF receives a creation response of the session management context session information returned by the V-SMF, determines that the V-SMF completes the creation process of the session management context session information, and establishes an N4 session to the V-UPF.
In the embodiment of the present application, step S120 may be implemented by the following steps:
V-SMF sends a protocol data unit session establishment request of the target terminal to H-SMF; the H-SMF then sends a subscription data retrieval request to the UDM to cause the UDM to retrieve the subscription data.
In the embodiment of the present application, step S160 may be to determine that the first packet detection rule belongs to an internal rule of a 5G virtual network Group (5G VN Group) through V-UPF, determine that the data packet has session information stored with a destination address, and route the data packet to the destination address. It can be understood that, in this embodiment, when the V-UPF receives a data packet including uplink traffic of the target terminal, a first packet detection rule is matched according to N4 session information of the target terminal, where the priority meets a preset requirement; determining that the first data packet detection rule belongs to an internal rule of the 5G virtual network group, forwarding the data packet to a V-UPF classifier, and matching a second data packet detection rule of the dialogue terminal for the 5G virtual network group; and inquiring N4 session information of the dialogue terminal according to the second data packet detection rule, and routing the data message to the dialogue terminal so as to realize roaming call.
In this embodiment, the first packet detection rule with the matching priority meeting the preset requirement according to the N4 session information of the target terminal may be an available packet detection rule with the highest priority according to the N4 session information of the target terminal as the first packet detection rule, and then a packet forwarding rule (FAR) corresponding to the first packet detection rule is obtained. The Destination Interface field in the packet forwarding rule is used for characterizing that the 5G virtual network group processed inside the visiting place user plane function network element obtains a data forwarding interface. And if the available data packet detection rule of the highest priority is not matched according to the N4 session information of the target terminal, discarding the data packet.
For the purpose of the interaction schematic diagram between the terminals or network elements shown in fig. 2, the method according to the embodiment of the present application includes, but is not limited to, the following steps:
step one, when a target terminal (UE) accesses a visiting place network through a satellite, the UE sends a PDU session request (PDU session establish request) to an AMF;
step two, after the AMF receives the PDU conversation request, sending a request for creating SM context to the V-SMF (Create SmContext Request);
step three, after the V-SMF sends an SM context creation response (Create SmContext Response) to the AMF, an N4 session between the V-SMF and the V-UPF is established (N4 Session Establish);
step four, the V-SMF sends PDU session establishment request (PDUSation_CreateRequest) to the H-SMF;
step five, H-SMF searches the application UDM subscription data (Subscription data retrieval) after receiving PDU session establishment request;
step six, after receiving the subscription data returned by the UDM, the H-SMF sends a session policy establishment request (SM Policy Establish) to the H-PAF;
step seven, after the H-SMF receives the strategy information returned by the H-PAF, an N4 session (N4 Session Establish) between the H-SMF and the H-UPF is established;
step eight, the H-SMF sends PDU Session establishment response (PDUSation_CreateResponse) to the V-SMF, modifies N4 Session (N4 Session modification) between the V-SMF and the V-UPF, and carries out N1N2 message transparent transmission between the V-SMF and the AMF;
and step nine, the AMF sends an N2 PDU session resource establishment request to the GNB so as to realize the roaming call between the target terminal and the dialogue terminal.
Based on the interaction diagram of fig. 2, the method of the embodiment of the present application can be summarized as follows:
when the target object encounters an emergency and needs rescue when the target object explores an area outside the home location, the target object accesses a visiting area network through a satellite in a roaming mode, and after the AMF receives a PDU session establishment request of the terminal, the AMF requests the NRF to find out H-SMF meeting the conditions and requests the V-SMF to create SM context session information. The SM context session information carries information about H-SMF, such as hSmfId, hSmfUri and Snssai. It can be appreciated that hSmfId is an identity ID identifying the H-SMF network element; hSmfUri is uri for calling H-SMF service call interface and is used for subsequent V-SMF request to access H-SMF; the Snssai is the requested slice information, and if the requested V-SMF does not contain the slice capability, the AMF needs to request the NSSF to find the V-SMF that satisfies the slice capability.
The V-SMF then establishes an N4 session to the V-UPF and issues a default rate rule. After waiting for the V-UPF reply to succeed, the V-SMF requests access to the H-SMF. Specifically, the request information carries information such as supi, vsmfId, vsmfUri and the like. The H-SMF applies udm for subscription data of the corresponding terminal to the target. The subscription data returned by the UDM includes vnGroupdata related information, such as dnn and sNssai. The vnGroupdata stores 5G VN Group information, dnn is a data network, the sndsai is a slice capability set, and the data network and the slice capability set used for accessing the subsequent H-SMF detection request of the subscription data meet the requirement of supporting transmission to the V-SMF and issuing the corresponding 5G VN Group rule. Acquiring subscription information of a current user from an H-SMF, acquiring policy information from a PCF, after the PCF returns corresponding policy information, issuing the policy information to the H-UPF by the H-SMF, transmitting the policy information and vnGroupdata to a V-SMF through callback vsmfUri, issuing the policy information to the V-UPF by the V-SMF, and independently establishing a corresponding PDR of a 5G VN Group.
If the received data message belongs to the 5G VN Group, the V-UPF inquires whether the session information of the destination address is stored, and if so, the V-UPF forwards the data message to the destination address in a routing way.
It will be appreciated that end-to-end conversations are implemented based on 5G LANs. It can be understood that the 5G LAN performs grouping operation on each terminal by using the 5G technology, and divides the object terminals into different groups, and when the object terminals belonging to the same group directly communicate, the UPF forwards the data stream to the destination address through the local enabling exchange. The administrator can divide the designated terminals into the same or different VN GROUP (Virtural Network Group virtual network GROUPs) by modifying the data in the UDM network element. The 5G VN Group communication includes one-to-one communication and one-to-many communication. One-to-one communication supports forwarding unicast traffic between two UEs within a 5G VN Group or between one UE and a device on the DN. One-to-many communication supports forwarding multicast traffic and broadcast traffic from one UE (or device on DN) to many/all UEs and devices on DN within a 5G VN Group.
As shown in fig. 3, the local enabled exchange flow of the VN Group in this embodiment is as follows:
when the UPF receives uplink data of the UE1, it is first detected whether the UPF stores N4 session information of the UE1, for example, information of UE IP, user ID, N4 session ID, gating status, etc., and the User ID includes IMSI, IMEI, MSISDN. If the detection does not exist, the data packet (namely uplink data) is directly discarded;
if the detection exists, detecting rules according to the data packet with highest matching priority in the PDR issued by the SMF, and detecting whether Destination Interface fields in FARs corresponding to the PDR are 5G VN International. Destination Interface marks the UPF internal processing VNGroup data forwarding interface. If the detected data packet is not 5G VN international, executing other corresponding forwarding rules to forward the data packet;
if the packet is detected as 5G VN International, forwarding the packet (namely uplink data) to a UPF classifier, matching PDR of the UE2 for 5G VN Group, and if the matching fails, discarding the packet;
if the matching is successful, the N4 session information of the UE2 is queried through the matched PDR, and the data packet is routed to the UE2.
In summary, it is known that, due to the continuous turnover operation of the satellite, the handoff process between satellites is involved after the satellite is operated to an out-of-service area. In order to ensure that a data message based on a 5G LAN can be normally forwarded during satellite switching, after a new serviceable UPF is found, a V-SMF preferentially transmits policy information to the new on-satellite UPF, and a downlink FAR address of an H-UPF is modified to be an N9 address of a Ho-UPF, at the moment, a data stream initiated from a UE2 is forwarded from the H-UPF to the Ho-UPF, so that the downlink data is ensured to be normally forwarded to the UE1 during switching, at the moment, the data stream initiated from the UE1 can be forwarded from the V-UPF or the Ho-UPF to the H-UPF, and after 5s, the V-SMF decides to delete a session on the V-UPF, so that the V-UPF is removed, the switching of the inter-satellite UPF is realized, and the problem of access limitation of an area network is solved, so that the use requirement of a target object in actual life is met.
The embodiment of the application provides a roaming call system based on satellites, which comprises:
at least one memory for storing a program;
at least one processor for loading the program to perform the satellite-based roaming call method of fig. 1.
The content of the method embodiment of the application is suitable for the system embodiment, the specific function of the system embodiment is the same as that of the method embodiment, and the achieved beneficial effects are the same as those of the method.
An embodiment of the present application provides a storage medium in which a computer-executable program is stored, which when executed by a processor, is configured to implement the satellite-based roaming call method shown in fig. 1.
The content of the method embodiment of the application is suitable for the system embodiment, the specific function of the system embodiment is the same as that of the method embodiment, and the achieved beneficial effects are the same as those of the method.
Embodiments of the present application also provide a computer program product or computer program comprising computer instructions stored in a computer readable storage medium. The computer instructions may be read from a computer-readable storage medium by a processor of a computer device, and executed by the processor, to cause the computer device to perform the satellite-based roaming call method shown in fig. 1.
The embodiments of the present application have been described in detail with reference to the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present application. Furthermore, embodiments of the application and features of the embodiments may be combined with each other without conflict.

Claims (10)

1. A satellite-based roaming call method, comprising the steps of:
when a target terminal accesses a visiting place network through a satellite and an access and mobility management function network element receives a protocol data unit session establishment request of the target terminal, the access and mobility management function network element requests to create session management context session information to the visiting place session management function network element so as to establish an N4 session between the visiting place session management function network element and a visiting place user plane function network element;
the visit place session management function network element requests to visit the home place session management function network element, and the home place session management function network element applies the subscription data of the target terminal to the unified data management function network element, wherein the subscription data comprises virtual network group data;
after the attribution session management function network element acquires the subscription data, acquiring policy information from an attribution policy control function network element;
the home session management function network element sends the subscription data and the policy information to the visiting session management function network element;
the visiting place session management function network element transmits the strategy information to the visiting place user plane function network element, and establishes a first data packet detection rule corresponding to a 5G virtual network group according to the subscription data;
and the visiting place user plane function network element carries out roaming call of the target terminal according to the first data packet detection rule.
2. The method of claim 1, wherein the access and mobility management function network element requests creation of session management context session information from the visitor session management function network element to establish an N4 session between the visitor session management function network element and the visitor user plane function network element, comprising:
the access and mobility management function network element sends a creation request of session management context session information to the visiting place session management function network element, wherein the session management context session information comprises parameter information of the home place session management function network element;
the access and mobility management function network element receives a creation response of the session management context session information returned by the visiting place session management function network element, and determines that the visiting place session management function network element completes the creation process of the session management context session information;
the visited place session management function network element establishes an N4 session to the visited place user plane function network element.
3. The method of claim 1, wherein the visiting place session management function network element requests access to a home place session management function network element, and wherein the home place session management function network element applies for subscription data of the target terminal to a unified data management function network element, and the method comprises:
the visiting place session management function network element sends a protocol data unit session establishment request of the target terminal to the home place session management function network element;
the home session management function network element sends a search request of subscription data to the unified data management function network element so that the unified data management function network element performs subscription data search.
4. The method of claim 1, wherein the visiting place user plane function network element performs the roaming call of the target terminal according to the first packet detection rule, and comprises:
the visiting place user plane function network element judges that the first data packet detection rule belongs to an internal rule of a 5G virtual network group, determines that the data message has session information stored with a destination address, and routes the data message to the destination address.
5. The method of claim 4, wherein the visitor location user plane function network element determines that the first packet detection rule belongs to a 5G virtual network group internal rule, determines that the data packet has session information stored with a destination address, and routes the data packet to the destination address, comprising:
when a visiting place user plane function network element receives a data message containing uplink flow of the target terminal, matching a first data packet detection rule with priority meeting preset requirements according to N4 session information of the target terminal;
determining that the first data packet detection rule belongs to an internal rule of a 5G virtual network group, forwarding the data packet to a classifier of a visiting place user plane function network element, and matching a second data packet detection rule of a dialogue terminal for the 5G virtual network group;
and inquiring N4 session information of the dialogue terminal according to the second data packet detection rule, and routing the data message to the dialogue terminal.
6. The method for satellite-based roaming call as claimed in claim 5, wherein the matching the first packet detection rule with priority satisfying a preset requirement according to the N4 session information of the target terminal includes:
according to the N4 session information of the target terminal, matching the available data packet detection rule with the highest priority as a first data packet detection rule;
and acquiring a packet forwarding rule corresponding to the first data packet detection rule, wherein a Destination Interface field in the packet forwarding rule is used for characterizing the 5G virtual network group processed inside the visiting place user plane function network element to obtain a data forwarding interface.
7. The method of satellite-based roaming call of claim 6, further comprising the steps of:
and discarding the data message according to the available data packet detection rule of the highest priority which is not matched with the N4 session information of the target terminal.
8. The method of claim 2, wherein the parameter information of the home session management function network element includes hSmfId, hSmfUri and Snssai, the hSmfId is used to characterize an identity of the home session management function network element, the hSmfUri is used to characterize a uniform resource identifier for calling a service session interface of the home session management function network element, and the Snssai is used to characterize the requested slice information.
9. A satellite-based roaming call system, comprising:
at least one memory for storing a program;
at least one processor configured to load the program to perform the satellite-based roaming call method of any one of claims 1-8.
10. A storage medium having stored therein a computer executable program for implementing the satellite-based roaming call method of any one of claims 1-8 when executed by a processor.
CN202310989734.6A 2023-08-07 2023-08-07 Satellite-based roaming call method, system and storage medium Pending CN117041938A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117580025A (en) * 2023-11-14 2024-02-20 广州爱浦路网络技术有限公司 User equipment roaming method, electronic equipment and storage medium based on SNPN private network

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117580025A (en) * 2023-11-14 2024-02-20 广州爱浦路网络技术有限公司 User equipment roaming method, electronic equipment and storage medium based on SNPN private network
CN117580025B (en) * 2023-11-14 2025-09-23 广州爱浦路网络技术有限公司 User equipment roaming method, electronic equipment and storage medium based on SNPN private network

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