CN114845276A - Method and platform for realizing network capability opening - Google Patents
Method and platform for realizing network capability opening Download PDFInfo
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- CN114845276A CN114845276A CN202210409955.7A CN202210409955A CN114845276A CN 114845276 A CN114845276 A CN 114845276A CN 202210409955 A CN202210409955 A CN 202210409955A CN 114845276 A CN114845276 A CN 114845276A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/50—Service provisioning or reconfiguring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/60—Subscription-based services using application servers or record carriers, e.g. SIM application toolkits
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- 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
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- 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
- H04W8/205—Transfer to or from user equipment or user record carrier
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention discloses a method for realizing network capability opening, which obtains S-CSCF network element response by sending a request through an NEF network element interface at the time of subscribing by User Equipment (UE) to obtain UE information data of the S-CSCF network element, and stores these data in the NEF network element interface, when the respective network element as well as external network elements want to access the subscription information, the method can be used for inquiring at one time without frequently initiating subscription, UE initiates a subscription request, an interface is exposed through an NEF network element interface and called by an S-CSCF network element in an IMS, the S-CSCF network element responds to the request and sends storage data to the NEF network element interface for storage, meanwhile, NF is sent to a subscriber, the next subscription is initiated, namely, the modified user registration state stored in the S-CSCF network element is updated, the experience of external entity class friendliness is provided, and the problems of information redundancy and frequent interface access in the prior art are solved.
Description
Technical Field
The invention relates to the field of communication, in particular to a method and a platform for realizing network capability opening.
Background
IMS (IP Multimedia subsystem) is short for IP Multimedia subsystem, 3GPPP (the 3) rd Generation Partnership Project) Formally proposed in the UMTS (Universal Mobile Telecommunications System) R5 standard edition.
The network architecture of the IMS in 3GPP is divided into three layers from bottom to top, a transport and access layer, a control layer, a data and application layer, and the core of the control layer is a CSCF entity, where S-CSCF (serving CSCF) is the core session management node of the IMS and is responsible for all session control functions, and the monitoring event function aims to monitor a specific event in the 3GPP system and report such monitoring event information through NEF.
The NEF capability is opened to support the external exposure of the network capability, the service capability exposed to the external mainly comprises a monitoring function, a supply capability, a strategy/charging function and an analysis reporting function, and in addition, the NEF can also provide an open security service capability for third-party applications. The protocol of JSON/XML, such as HTTPS/HTTP, is adopted between the NEF and the third party application. When interacting with the network element, the corresponding protocol conversion work is needed.
Under an IMS framework, when a user terminal UE end wants to subscribe UE information, a UE entity initiates subscription to the UE information, an S-CSCF network element returns the UE information to a subscriber after finishing judgment, registration state information of the user in the S-CSCF network element is monitored, and the S-CSCF network element sends NOTIFY information to all subscribers to inform the subscribers of the change of the user state information when the user state information changes.
In the prior art, when a UE entity initiates a subscription to information such as a user registration status, an S-CSCF network element may determine whether a user has registered according to an identifier in a PAI message header, and then the S-CSCF network element may return NOTIFY information to the UE entity to NOTIFY the registration status and similar information of the user, but active subscription queries only data class once, and cannot query all current class data, so that information is redundant, and frequent access to an interface is not friendly to the UE operation.
Disclosure of Invention
Technical problem to be solved
In order to solve the above technical problems, the present invention provides a method for implementing network capability openness, which obtains all UE information by calling an S-CSCF network element in an IMS through an NEF network element interface exposure interface, and stores the UE information in the NEF network element interface, and when each network element and an external network element want to access subscription information, the UE can query once without frequently initiating a subscription.
(II) technical scheme
In order to solve the technical problems and achieve the purpose of the invention, the invention is realized by the following technical scheme:
a method for realizing network capability opening is characterized in that the method comprises the following steps:
user Equipment (UE) sends a request to an S-CSCF network element through an NEF network element interface, and the NEF network element interface sends a request for subscribing an event in the S-CSCF network element in the request;
the method comprises the steps that an S-CSCF network element acquires information of user equipment UE, and judges whether event subscription is authorized by an IMS (IP multimedia subsystem) or not and whether a user state is registered or not;
and if the user is registered, the S-CSCF network element returns confirmation information, then the S-CSCF network element sends a message to the NEF network element interface for response, the user registration state is informed, the SCSCF network element responds and replies the NEF network element interface, and user equipment UE information is sent to the NEF network element interface for storage. And the UE end of the user equipment calls an S-CSCF network element in the IMS through the NEF network element interface exposure interface to obtain the UE information.
And after receiving the subscription information request, the S-CSCF network element judges the identifier, sends a message to a subscriber, namely User Equipment (UE) after the information acquisition is completed, transmits the information, and exposes the information through an interface of the NEF network element to obtain a response message and manage the user data.
And when the user registration information state changes, the S-CSCF network element continuously sends the modified and changed UE information to the UE, namely the subscriber, and stores the modified and changed UE information in the S-CSCF network element, and when the UE initiates subscription next time, the stored UE information of the NEF network element interface is updated in response to the NEF network element interface.
Further, the NEF network element interface request defines the type of the requested report, and one or more subscribed receiving events are identified by the event ID.
Further, the method for judging whether the user state is registered specifically includes: and inquiring service session control equipment, wherein the S-CSCF network element needs to judge whether the identifier in the PAI message header file is registered on the S-CSCF network element or not under the condition that the S-CSCF network element receives an event subscription. And sending the subscription information only if the user equipment UE is registered on the S-CSCF network element, otherwise, refusing to send the subscription information by the S-CSCF network element.
Further, the UE information includes: PLMN (Public Land Mobile Network), IMPU (IP Multimedia Public Identity) IP Multimedia Public Identity, current SCSCF slice information, Visited domain (P-Visited-Network-ID), terminal IP and port.
Further, after the information acquisition is completed, the S-CSCF network element sends a NOTIFY message to the subscriber user equipment UE; the S-CSCF network element supports a public identity IMPU to share and use in a plurality of private identity IMPIs.
Further, when the user equipment UE communicates with the S-CSCF network element through the NEF network element interface, the SIP protocol and the SDP protocol are combined for application; JSON/XML protocol is adopted between the NEF network element interface and the IMS, such as HTTPS/HTTP;
when the NEF network element interface sends a request to the IMS, the S-CSCF network element checks the basic service data of the user in the IMS session process of the user and then authorizes the basic service data, the S-CSCF network element subscribes the content according to the SIP request after authorization, and the S-CSCF network element checks the media parameter of the SDP in the SIP request and limits the subscribed content.
The invention also provides a network capability open platform, comprising:
the interface transceiver module: the system comprises a network element used for receiving a sending request of User Equipment (UE) and sending the request to an S-CSCF network element; and receiving the user registration state sent by the S-CSCF network element, and sending the UE information to the NEF network element interface for storage. And the UE end calls an S-CSCF network element in the IMS through the NEF network element interface exposure interface to obtain the UE information.
A first storage module: and the UE is positioned in the NEF network element interface and used for storing the UE information.
A second storage module: and the UE information storage device is positioned in the S-CSCF network element and used for storing the updated UE information when the state of the user registration information is changed.
A user registration state verification module: the method is used for acquiring the information of the UE, and judging whether the event subscription is authorized by the IMS and whether the user state is registered.
Further, the NEF network element interface is bus-connected to all Network Functions (NF) based on the service fabric.
Furthermore, the north direction in the NEF network element interface is an open API interface, and the rest are south direction interfaces interfacing with the 5 GC.
Further, an internal SBA protocol is adopted between the NEF network element interface and other network elements.
Further, when the S-CSCF network element accepts the request, the user identity needs to be authenticated, and the user has a private identity IMPI and a public identity IMPU, and the SIP-URI is used to identify the user.
The invention also provides a computer readable storage medium, which stores a computer program, and the computer program realizes the method for realizing the network capability opening when being executed by a processor.
(III) advantageous effects
The invention obtains all UE information by calling the S-CSCF network element in the IMS through the NEF network element interface exposure interface on the basis of initiating the subscription by the UE entity, and stores the UE information in the NEF network element interface.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a flowchart of an S-CSCF network element generation subscription and notification operation according to an embodiment of the present application;
fig. 2 is a schematic diagram of a network capability open platform according to an embodiment of the present application.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be carried into practice or applied to various other specific embodiments, and various modifications and changes may be made in the details within the description and the drawings without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present disclosure, and the drawings only show the components related to the present disclosure rather than the number, shape and size of the components in actual implementation, and the type, amount and ratio of the components in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
An implementation method for opening network capability includes the following steps, which are shown in fig. 1:
s1: user Equipment (UE) sends a request to an S-CSCF network element through an NEF network element interface;
the NEF network element interface sends a request for subscribing to an event in the S-CSCF network element in an IMS _ reg _ EventExposure _ Subscribe request, which defines the type of report requested. The subscribed receiving events may be one or more and are identified by an event ID.
S2: and the S-CSCF network element acquires the information of the user equipment UE, and judges whether the event subscription is authorized by the IMS and whether the user state is registered.
The method for judging whether the user state is registered specifically comprises the following steps: and inquiring the service session control equipment, wherein the S-CSCF network element needs to judge whether the identifier in the PAI message header file is registered on the S-CSCF network element or not under the condition that the S-CSCF network element receives a subscription. And sending the subscription information only if the user equipment UE is registered on the S-CSCF network element, otherwise, refusing to send the subscription information by the S-CSCF network element.
S3: and if the user is registered, the S-CSCF network element returns confirmation information, then the S-CSCF network element sends a NOTIFY message to the NEF network element interface to perform IMS _ reg _ EventExposure _ Subscripte response, the user registration state is informed, and the SCSCF network element responds and replies the NEF network element interface to send user equipment UE information to the NEF network element interface for storage. And the UE end of the user equipment calls an S-CSCF network element in the IMS through the NEF network element interface exposure interface to obtain the UE information of the user equipment.
The user equipment UE information comprises the following information:
(1) PLMN (public Land Mobile network) public Land Mobile network. The network must be interconnected to the Public Switched Telephone Network (PSTN) to form a regional or national scale communications network, the PLMN MCC + MNC being 46000, 46002 for china mobile, 46001 for china unicom and 46003 for china telecom, the PLMN being a wireless communications system intended for users who travel or walk on land by means of vehicles. For a particular terminal, it is often necessary to maintain several different types of PLMN lists, with multiple PLMNs in each list.
(2) IMPU (IP Multimedia Identity) IP Multimedia Public Identity. When an IMS user wants to communicate with other users, it needs to use the IP multimedia public identity. IMS allows multiple IMPUs to be bound on one IMPI. IMPU may also be shared with other phones.
IMPI (IP multimedia private identity), which is a global identity permanently assigned by the main network operator, can be used for registration, authentication, administration, and billing purposes. There may be multiple IMPIs (equivalent to IMSIs) per IMS user
User state, number of users in registration state, registration type cancellation, and IMS call flow. And the user equipment UE verifies the AUTN, and the mobile phone successfully verifies the network after the AUTN is successfully verified. And calculates RES over RAND and the shared key.
(3) Current S-CSCF network element slicing information. When the user equipment UE registers to the PLMN through the access type, if the user equipment UE has any one or two of the following: the "configured NSSAI" for the PLMN, the "allowed NSSAI" for the PLMN and access type. The user equipment UE should provide a "requested NSSAI" to the network for use by the registration process of the user equipment UE, where the "requested NSSAI" includes the S-NSSAI corresponding to the network slice that the user equipment UE wishes to register.
(4) Current PANI (P-Access-Network-ID). Access Network Information uses the IMS control channel protocol between the User Equipment (UE) and the IMS Control Channel Function (ICCF) and Session Initiation Protocol (SIP) interfaces (and the ICCF, call session control function, and application server) to support an indication of Circuit Switched (CS) Access with P-Access-Network-Information. The S-CSCF network element may use the indication for different purposes such as routing decisions, charging and presence information.
(5) Visited domain (P-Visited-Network-ID). The entity in the IMS core network must forward the header field in the signaling domain, and when the signaling leaves the signaling domain, the last entity module must delete the header field. When the S-CSCF network element finds that the signaling request does not belong to the home network and should be forwarded to other visiting networks, the S-CSCF network element is used as the last entity S-CSCF network element in the signaling domain and deletes the header domain from the signaling for forwarding.
(6) Terminal ip, port. The IMS terminal address and the port IP address form a network address plus a host address, which is generally the IP of the visiting network where the P-CSCF network element is located.
Furthermore, the user equipment UE adopts the combination of the SIP protocol and the SDP protocol when communicating with the S-CSCF network element through the NEF network element interface. The SIP protocol, the session initiation protocol, is a signaling protocol that controls the initiation, modification and termination of interactive multimedia sessions. SDP, called session description protocol, is appended inside SIP messages, i.e. Body, and is used to negotiate the IP addresses, ports and media coding, bandwidth, etc. to be used by the RTP protocol. In communication, SIP does not define the type of session established itself, but only how the session is managed, and SDP transfers media stream information in a media session, allowing the recipient of the session description to participate in the session. When SIP initiates a session, firstly, the SIP sends an INVITE to indicate that a calling user initiates a session request to INVITE other users to join the session, a called side sends 180Ringing to represent that the INVITE message is sent to the called side, the calling side is informed that the called side rings, 200OK information is sent aiming at SIP INVITE message, the message is used as final response, and both sides of the SDP content part are completely exchanged.
S4: after receiving the subscription information request, the S-CSCF network element judges the identifier, sends a NOTIFY message to the subscriber, namely a user equipment UE end after the information is acquired, transmits IMS _ reg _ EventExposure _ info, obtains a response message through the NEF network element interface exposure information, manages user data, and supports a certain IMPU to be shared and used in a plurality of IMPIs.
Further, JSON/XML protocol is adopted between the NEF network element interface and the IMS, such as HTTPS/HTTP.
S5: and when the user registration information state changes, the S-CSCF network element continuously sends the modified and changed user equipment UE information to the user equipment UE, namely a subscriber, and stores the modified and changed user equipment UE information in the S-CSCF network element, and when the user equipment UE initiates subscription next time, the stored user equipment UE information of the NEF network element interface is updated in response to the NEF network element interface.
An embodiment of the present invention further provides a network capability opening platform, as shown in fig. 2, the platform includes:
an interface transceiver module: the system comprises a network element used for receiving a sending request of User Equipment (UE) and sending the request to an S-CSCF network element; and receiving the user registration state sent by the S-CSCF network element, and sending the UE information of the user equipment to the NEF network element interface for storage. And the UE end of the user equipment calls an S-CSCF network element in the IMS through the NEF network element interface exposure interface to obtain the UE information of the user equipment.
A first storage module: and the UE interface is positioned in the NEF network element interface and used for storing the UE information of the user equipment.
A second storage module: and the system is positioned in the S-CSCF network element and used for storing the updated UE information when the user registration information state changes.
A user registration state verification module: the method is used for acquiring the information of User Equipment (UE), and judging whether the event subscription is authorized by an IMS (IP multimedia subsystem) or not and whether the user state is registered or not.
The NEF network element interface is deployed in a 5GC, the NEF network element interface under the 5G network is connected with all Network Functions (NF) in a bus mode based on a service architecture, the S-CSCF network element under the IMS is the network element of the 4G, the north direction in the NEF is an open API interface, the rest are south direction interfaces in butt joint with the 5GC, and an internal SBA protocol is adopted between the NEF network element interface and other network elements, so that corresponding protocol conversion work is required. The IMS needs SIP protocol, different from the 5GC interface sending subscription request, the NEF network element interface sends a request to the IMS, the S-CSCF network element checks basic service data of the user in the user IMS session process and then authorizes the basic service data, the S-CSCF network element subscribes contents according to the SIP request after authorization, the S-CSCF network element checks media parameters of SDP in the SIP request and limits the subscribed contents, and a JSON/XML protocol is adopted between the NEF network element interface and the IMS, for example, HTTPS/HTTP is used.
The IMS network element is identified by adopting a SIP-URI way, the network element identification SIP-URI is used for identifying the network nodes in a message header field of a SIP message, when the S-CSCF network element receives a request, the user identification needs to be identified, the user has a private identification IMPI and a public identification IMPU, and the SIP-URI is also used for identifying the user.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements made to the technical solution of the present invention by those skilled in the art without departing from the spirit of the present invention shall fall within the protection scope defined by the claims of the present invention.
Claims (10)
1. A method for realizing network capability opening is characterized by comprising the following steps:
user Equipment (UE) sends a request to an S-CSCF network element through an NEF network element interface, and the NEF network element interface sends a request for subscribing an event in the S-CSCF network element in the request;
the method comprises the steps that an S-CSCF network element acquires information of user equipment UE, and judges whether event subscription is authorized by an IMS (IP multimedia subsystem) or not and whether a user state is registered or not;
if the user is registered, the S-CSCF network element returns confirmation information, then the S-CSCF network element sends a message to the NEF network element interface for response, the user registration state is informed, the SCSCF network element responds and replies the NEF network element interface, user equipment UE information is sent to the NEF network element interface for storage, and a user equipment UE end is called to the S-CSCF network element in the IMS through the NEF network element interface exposure interface to obtain the UE information;
after receiving the subscription information request, the S-CSCF network element judges the identifier, sends a message to a subscriber, namely User Equipment (UE) after the information acquisition is completed, transmits the information, and exposes the information through an interface of the NEF network element to obtain a response message and manage user data;
and when the user registration information state changes, the S-CSCF network element continuously sends the modified and changed UE information to the UE, namely the subscriber, and stores the modified and changed UE information in the S-CSCF network element, and when the UE initiates subscription next time, the stored UE information of the NEF network element interface is updated in response to the NEF network element interface.
2. The method as claimed in claim 1, wherein the NEF element interface request defines a type of the requested report, and one or more subscribed receiving events are identified by an event ID.
3. The method for implementing network capability opening according to claim 1, wherein the method for determining whether the user state is registered specifically includes: and inquiring service session control equipment, wherein the S-CSCF network element needs to judge whether the identifier in the PAI message header file is registered on the S-CSCF network element or not under the condition that the S-CSCF network element receives an event subscription.
4. The method of claim 3, wherein the UE information comprises: PLMN, IMPU, current SCSCF slice information, visit domain, terminal ip and port.
5. The method as claimed in claim 1, wherein the S-CSCF network element supports shared use of a public identity IMPU among multiple private identity IMPIs.
6. The method of claim 5, wherein the SIP protocol and the SDP protocol are applied in combination when the UE communicates with the S-CSCF via the NEF network element interface; JSON/XML protocol is adopted between the NEF network element interface and the IMS.
7. The method as claimed in claim 6, wherein the S-CSCF network element checks the media parameter of SDP in the SIP request, and restricts the subscription content.
8. A network capability opening platform, comprising:
the interface transceiver module: the system comprises a network element used for receiving a sending request of User Equipment (UE) and sending the request to an S-CSCF network element; receiving a user registration state sent by an S-CSCF network element, sending UE information to an NEF network element interface for storage, and calling the S-CSCF network element in the IMS through an NEF network element interface exposure interface by a UE end to obtain the UE information;
a first storage module: the network element interface is positioned in the NEF and used for storing the UE information;
a second storage module: the system comprises a network element of S-CSCF, a network element of S-CSCF and a network element of S-CSCF, wherein the network element is used for storing updated UE information when the state of the user registration information changes;
a user registration state verification module: the method is used for acquiring the information of the UE, judging whether the event subscription is authorized by the IMS and whether the user state is registered.
9. The platform of claim 8, wherein the NEF element interfaces are API interfaces with open north and are all southbound interfaces interfacing with 5 GC.
10. A computer-readable storage medium, in which a computer program is stored, which, when being executed by a processor, implements the method for implementing network capability openness as claimed in any one of claims 1 to 7.
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