CN113423078B - Application program network fragment selection method, application server and PCF - Google Patents

Application program network fragment selection method, application server and PCF Download PDF

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CN113423078B
CN113423078B CN202110618099.1A CN202110618099A CN113423078B CN 113423078 B CN113423078 B CN 113423078B CN 202110618099 A CN202110618099 A CN 202110618099A CN 113423078 B CN113423078 B CN 113423078B
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nssai
pdu session
application server
network
application
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CN113423078A (en
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张伦泳
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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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
    • H04W4/20—Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0893—Assignment of logical groups to network elements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/50—Network services
    • H04L67/55—Push-based network services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • 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

Abstract

The present disclosure provides a method for selecting application program network segments, an application server, a PCF, an electronic device, and a storage medium, the method comprising: after identifying that the data stream in the current session of the UE needs network fragments of various types, the application server sends the network fragments to the UE; sending a second S-NSSAI and an application identifier required by other service data different from the data flow characteristics borne by the PDU session to the PCF, enabling the PCF to select the second S-NSSAI from the NSSAIs ordered by the server and send the second S-NSSAI to the AMF, and indicating the second S-NSSAI to select a corresponding network fragment instance for a new session between the application server and the UE; and the application server initiates a new PDU session for the UE according to the network fragment instance and indicates the UE to use the new PDU session for carrying the other service data. The technical scheme of the disclosure can realize that one application program uses a plurality of network fragments to bear the data flow of the application program.

Description

Application program network fragment selection method, application server and PCF
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a method for selecting an application network segment, an application server, a PCF, an electronic device, and a computer-readable storage medium.
Background
The 5G network allows the application program to correspond to one or more S-NSSAIs (Single network Slice Selection Assistance Information). Therefore, when a User Equipment (UE) creates a Protocol Data Unit (PDU) session for an application program, a Data stream related to the application program can be corresponded to a network fragment instance determined according to the S-NSSAI; or when the UE selects the existing PDU session for the application program, the PDU session associated with the same S-NSSAI is selected to carry the data flow related to the application program.
In the existing 5G specification, when a UE selects an S-NSSAI for an application, only one S-NSSAI can be selected, even though a plurality of S-NSSAIs related to the application are included in a URSP (UE Route Selection Policy) or an NSSP (Network Slice Selection Policy) issued by a PCF (Policy Control Function).
However, in practical applications, an application may need to use multiple different network segments to carry its data stream at the same time, which requires that the application can correspond to at least 2S-NSSAIs, and there is no specific method available in the prior art.
Disclosure of Invention
The application program network fragment selection method, the application server, the PCF, the electronic equipment and the computer readable storage medium can realize that a plurality of different network fragment instances are simultaneously distributed to one application program, so that one application program simultaneously uses a plurality of different network fragments to bear the data stream of the application program, and the user experience is improved.
In a first aspect, an embodiment of the present disclosure provides an application program network segment selection method, which is applied to an application server, and the method includes:
after UE selects a first S-NSSAI for an application program on the UE and creates a PDU session according to the first S-NSSAI, if an application server identifies that a data stream of the PDU session needs to use at least two different types of network fragment bearers, a first S-NSSAI used by the PDU session is obtained from the UE;
a second S-NSSAI required by other service data which is different from the data flow characteristic corresponding to the first S-NSSAI in the data flow of the PDU session, and the application identifier of the application program is sent to the PCF, so that the PCF obtains the NSSAI (Network Slice Selection Assistance Information) ordered by the application server according to the application identifier, if the second S-NSSAI is judged to be in the NSSAI ordered by the application server, it is sent to an Access and Mobility Management Function (AMF) serving the UE, and instructs the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server with the UE according to the second S-NSSAI, then, first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI is returned to the application server through the PCF;
and after receiving the first confirmation information, initiating a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI, and indicating the UE to use the new PDU session to carry other service data.
Further, the method further comprises:
after sending the second S-NSSAI and the application identifier of the application program to the PCF, if the PCF determines that there is no second S-NSSAI in the NSSAIs subscribed by the application server, the PCF selects an S-NSSAI from the NSSAIs that is closest to the network fragmentation characteristic of the second S-NSSAI as a third S-NSSAI to send to the AMF, and instructs the AMF to select a corresponding network fragmentation instance for a new PDU session with the UE to be initiated by the application server according to the third S-NSSAI, and then returns second confirmation information that the network fragmentation instance corresponding to the third S-NSSAI can be used to the application server through the PCF;
and after receiving the second confirmation information, initiating a new PDU session to the UE according to the network fragment instance corresponding to the third S-NSSAI, and indicating the application program to use the new PDU session to carry the other service data.
Further, the data flow characteristics of the other service data are multiple, and each data flow characteristic corresponds to one second S-NSSAI, so that the number of the second S-NSSAIs sent to the PCF is multiple.
Further, the instructing the UE to use the new PDU session to carry the other service data includes:
after the new PDU session is established, instructing the application program on the UE to use the new PDU session to carry other service data with different data flow characteristics corresponding to the first S-NSSAI, so that the application program instructs the UE to use the new PDU session to carry the other service data.
In a second aspect, an embodiment of the present disclosure provides an application network segment selection method, where the method is applied to a PCF, and the method includes:
receiving a second S-NSSAI sent by an application server and an application identifier of an application program, wherein the second S-NSSAI is obtained by the application server after the UE selects a first S-NSSAI for a certain application program on the application server and creates a PDU session according to the first S-NSSAI, if the fact that data flow in the PDU session needs to use network fragment bearers of at least two different types is identified, a first S-NSSAI used by the PDU session is obtained from the UE, and the second S-NSSAI is determined according to S-NSSAI needed by other service data which are different from data flow characteristics corresponding to the first S-NSSAI in the data flow of the PDU session;
acquiring NSSAI ordered by the application server according to the application identifier;
judging whether the second S-NSSAI exists in NSSAIs ordered by the application server;
if so, sending the second S-NSSAI to an AMF providing service for the UE, indicating the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by an application server and the UE according to the second S-NSSAI, and returning the network fragment instance corresponding to the second S-NSSAI to the PCF;
and returning first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI to the application server, so that after the application server receives the first confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the second S-NSSAI, and the UE is instructed to use the new PDU session to carry other service data.
Further, the method further comprises:
if the second S-NSSAI is not in the NSSAIs subscribed by the application server, selecting one S-NSSAI closest to the network fragmentation characteristic of the second S-NSSAI from the NSSAIs as a third S-NSSAI to be sent to the AMF, indicating the AMF to select a corresponding network fragmentation instance for a new PDU session to be initiated by the application server and the UE according to the third S-NSSAI, and returning the network fragmentation instance corresponding to the third S-NSSAI to the PCF;
and returning second confirmation information which can use the network fragment instance corresponding to the third S-NSSAI to the application server, so that after the application server receives the second confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the third S-NSSAI, and the application program is instructed to use the new PDU session to carry other service data.
In a third aspect, an embodiment of the present disclosure provides an application server, including:
the identification and acquisition module is arranged for acquiring a first S-NSSAI used by the PDU session from the UE if the application server identifies that the data stream of the PDU session needs to use at least two different types of network fragment bearers after the UE selects the first S-NSSAI for a certain application program on the UE and creates the PDU session according to the first S-NSSAI;
a first sending module, configured to send a second S-NSSAI required by other service data different from the data flow characteristic corresponding to the first S-NSSAI in the data flow of the PDU session and an application identifier of the application program to the PCF, so that the PCF obtains the NSSAI ordered by the application server according to the application identifier, and if it is determined that there is the second S-NSSAI in the NSSAI ordered by the application server, send the second S-NSSAI to an AMF that is serving the UE, and instruct the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server and associated with the UE according to the second S-NSSAI, and then return first confirmation information that the network fragment instance corresponding to the second S-NSSAI can be used to the application server through the PCF;
a first receiving module configured to receive the first acknowledgement information;
and the session module is configured to initiate a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI after the first receiving module receives the first acknowledgment information, and instruct the UE to use the new PDU session to carry the other service data.
In a fourth aspect, an embodiment of the present disclosure provides a PCF, including:
a second receiving module, configured to receive a second S-NSSAI sent by an application server and an application identifier of an application program, where the second S-NSSAI is obtained by the application server after the UE selects a first S-NSSAI for an application program on the second S-NSSAI and creates a PDU session based on the first S-NSSAI, and if it is identified that a data stream in the PDU session needs to use network segment bearers of at least two different types, a first S-NSSAI used by the PDU session is obtained from the UE, and the first S-NSSAI is determined according to S-NSSAI needed by other service data that is different from a data stream characteristic corresponding to the first S-NSSAI in the data stream of the PDU session;
the acquisition module is arranged for acquiring NSSAI ordered by the application server according to the application identifier;
a judging module configured to judge whether the second S-NSSAI exists among NSSAIs subscribed by the application server;
a second sending module, configured to send the second S-NSSAI to an AMF that is providing service for the UE if the determining module determines that the second S-NSSAI is included in the NSSAIs subscribed by the application server, and instruct the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server with the UE according to the second S-NSSAI, and return the network fragment instance corresponding to the second S-NSSAI to the PCF; and the number of the first and second groups,
and returning first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI to the application server, so that after the application server receives the first confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the second S-NSSAI, and the UE is instructed to use the new PDU session to carry other service data.
In a fifth aspect, an embodiment of the present disclosure further provides an electronic device, including a memory and a processor, where the memory stores a computer program, and when the processor runs the computer program stored in the memory, the processor executes the application network slice selection method according to any one of the first aspect and the second aspect.
In a sixth aspect, this disclosed embodiment also provides a computer-readable storage medium, including: a computer program which, when run on a computer, causes the computer to perform the method for application network slice selection as defined in any one of the first and second aspects.
Has the advantages that:
when the application server identifies that a data flow between a current client and the client needs a plurality of different network fragments to carry the data flow, the application server requests one or more S-NSSAIs which are in accordance with the characteristics of the application service data flow and are different from the currently used network fragment from the PCF, the PCF indicates the AMF to distribute a corresponding network fragment instance, and then a server initiates one or more session connections to the client according to the corresponding network fragment instance distributed by the AMF so as to indicate the client to carry predetermined service data on the corresponding newly established session. The technical scheme of the disclosure can realize that a plurality of different network fragment instances are simultaneously distributed to one application program, one application program simultaneously uses a plurality of different network fragments to bear the data stream of the application program, a plurality of different S-NSSAIs fully exert the application performance of the application program, and the user experience is improved.
Drawings
Fig. 1 is a schematic flowchart of a method for selecting an application network segment according to a first embodiment of the present disclosure;
fig. 2 is a schematic flowchart of a method for selecting an application network segment according to a second embodiment of the present disclosure;
fig. 3 is a schematic flowchart of a method for selecting an application network segment according to a third embodiment of the present disclosure;
fig. 4 is an architecture diagram of an application server according to a fourth embodiment of the present disclosure;
fig. 5 is an architecture diagram of a PCF according to a fifth embodiment of the present disclosure;
fig. 6 is an architecture diagram of an electronic device according to a sixth embodiment of the disclosure.
Detailed Description
In order to make the technical solutions of the present disclosure better understood by those skilled in the art, the present disclosure is further described in detail below with reference to the accompanying drawings and examples.
In which the terminology used in the embodiments of the disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in the disclosed embodiments and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
In the prior art, the method used to determine the S-NSSAI for an application is to first select from among the URSPs from the PCF or a given one or more of the NSSPs in the URSP. If the appropriate S-NSSAI cannot be selected from, then one is selected for the application based on the UE' S local policy. If this does not yet determine the appropriate S-NSSAI, then the S-NSSAI in the default rule in URSP is used. However, in either approach, the S-NSSAI employed by the application needs to be determined before creating or selecting a PDU session for the application on the user terminal equipment. Moreover, when the UE selects an S-NSSAI for an application, only one S-NSSAI can be selected, and when an application may need to use multiple different network segments to carry its data stream at the same time, there is no specific method in the prior art.
The following describes the technical solutions of the present disclosure and how to solve the above problems in detail with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic flowchart of a method for selecting an application network fragment according to an embodiment of the present disclosure, which is applied to an application server, and as shown in fig. 1, the method includes:
step S101: after UE selects a first S-NSSAI for an application program on the UE and creates a PDU session according to the first S-NSSAI, if an application server identifies that a data stream of the PDU session needs to use at least two different types of network fragment bearers, a first S-NSSAI used by the PDU session is obtained from the UE;
step S102: sending a second S-NSSAI required by other service data different from the data flow characteristics corresponding to the first S-NSSAI in the data flow of the PDU session and an application identifier of the application program to the PCF, so that the PCF obtains the NSSAI ordered by the application server according to the application identifier, if the second S-NSSAI is judged to exist in the NSSAI ordered by the application server, the second S-NSSAI is sent to the AMF which is providing service for the UE, the AMF is indicated to select a corresponding network fragment instance for a new PDU session which is about to be initiated by the application server and is about to be used with the UE, and then first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI is returned to the application server through the PCF;
step S103: and after receiving the first confirmation information, initiating a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI, and indicating the UE to use the new PDU session to carry other service data.
The 5G core Network supports a PDU connection service, which is a service for exchanging PDU packets between the UE and a DN (Data Network, such as an operator service, internet or third party service, etc.); the PDU connection service is implemented by the UE initiating the establishment of a PDU session. After a PDU session is established, a data transmission channel between the UE and the DN is established. The UE may establish multiple PDU session connections to the same DN and connect to the DN through different UPFs.
The UE selects a first single network segment selection assistance information (denoted S-NSSAI-1) for the application on it and accordingly creates (or selects) a PDU session carrying data transfer between the application and the application server. After the application server identifies that the data stream in the PDU session needs to use at least two different types of network fragments (to ensure user service experience), the application program requests the single network fragment selection auxiliary information used by the PDU session, the application program obtains the single network fragment selection auxiliary information used by the PDU session from the UE as the first S-NSSAI, i.e., S-NSSAI-1, and then sends the S-NSSAI-1 to the application server. And the application server sends second single-Network fragment selection auxiliary information (marked as S-NSSAI-2), a UE identifier (a user mobile phone number and the like) and an application identifier on the UE, which are required by service data different from the PDU session data stream characteristic corresponding to the S-NSSAI-1, to the PCF through an NEF (Network Function opening) entity. In the embodiment of the present disclosure, if the application server is a server of the operator itself or a server considered by the operator as trusted, the sending process may not pass through the NEF, in an implementation manner of the embodiment of the present disclosure, the application program camera monitoring program of the UE may be a data stream that is carried by the PDU session corresponding to the first S-NSSAI and may be a data stream that is downloaded by a video stream as a main, such as a camera monitoring video, and the data stream carried by the application program camera monitoring program is characterized by a larger bandwidth required by the video stream downloading and is insensitive to delay, and further, in the service data of the camera monitoring program, there is a control signaling stream that is used for operating the camera platform in real time and is characterized by a second S-NSSAI that is relatively small in bandwidth requirement and sensitive to delay, so that the application server determines other service data (control signaling stream for operating in real time) that is different from the data stream characteristic carried by the PDU session corresponding to the first S-NSSAI, and sends it to the PCF. PCF inquires NSSAI subscribed by the server of the application from UDR (Unified Data Repository) according to the application identification, and the UDR returns NSSAI subscribed by the application server to PCF. The PCF checks whether S-NSSAI-2 (second S-NSSAI) is in NSSAI subscribed by an application service end, if yes, S-NSSAI-2 is selected and is used as finally selected single network fragment selection auxiliary information to be sent to AMF providing service for UE, the AMF is indicated to select a network fragment instance corresponding to the finally selected single network fragment selection auxiliary information for PDU conversation to be initiated by the application server and the UE, namely the network fragment instance corresponding to S-NSSAI-2, the AMF selects the auxiliary information (namely S-NSSAI-2) according to the single network fragment from the PCF, selects a corresponding core network fragment instance, and indicates the RAN to select the wireless network fragment instance. The AMF returns an acknowledgement message to the PCF, which returns an acknowledgement message to the application server via the NEF. And after receiving the confirmation information, the application server initiates a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI and indicates the UE to use the new PDU session for carrying the other service data.
Therefore, the embodiment of the disclosure can realize that a plurality of different network fragment instances are used for carrying the service data according to the characteristics of different service data generated by one application program, thereby fully exerting the application performance of the network fragment instances.
Further, the method further comprises:
after sending the second S-NSSAI and the application identifier of the application program to the PCF, if the PCF determines that there is no second S-NSSAI in the NSSAIs subscribed by the application server, the PCF selects an S-NSSAI from the NSSAIs that is closest to the network fragmentation characteristic of the second S-NSSAI as a third S-NSSAI to send to the AMF, and instructs the AMF to select a corresponding network fragmentation instance for a new PDU session with the UE to be initiated by the application server according to the third S-NSSAI, and then returns second confirmation information that the network fragmentation instance corresponding to the third S-NSSAI can be used to the application server through the PCF;
and after receiving the second confirmation information, initiating a new PDU session to the UE according to the network fragment instance corresponding to the third S-NSSAI, and indicating the application program to use the new PDU session to carry the other service data.
If the PCF checks that the application server subscribes to NSSAI without the second S-NSSAI, the PCF selects a single network segment selection auxiliary information (denoted as a third S-NSSAI) closest to the network segment characteristics of the second S-NSSAI (S-NSSAI-2) from the NSSAIs. And sending the third S-NSSAI to the AMF, and indicating the AMF to select a network fragment instance corresponding to the third S-NSSAI for the PDU session to be initiated by the application server and the UE. And carrying other service data different from the data flow characteristics carried by the PDU session corresponding to the first S-NSSAI by the network fragment instance corresponding to the third S-NSSAI.
In another embodiment of the present disclosure, the PCF may also return a request failure message directly to the application server if the second S-NSSAI is not in the NSSAI returned by the UDR.
Further, the data flow characteristics of the other service data are multiple, and each data flow characteristic corresponds to one second S-NSSAI, so that the number of the second S-NSSAIs sent to the PCF is multiple.
In the ongoing data session, if a plurality of network fragments with different characteristics are also needed, a plurality of different S-NSSAIs may be requested from the PCF at the same time, not limited to 1, and a plurality of corresponding network fragment instances are obtained, and the application server instructs the UE to determine its corresponding network fragment instance of the bearer according to the data characteristics, respectively.
Further, the instructing the UE to use the new PDU session to carry the other service data includes:
after the new PDU session is established, instructing the application program on the UE to use the new PDU session to carry other service data with different data flow characteristics corresponding to the first S-NSSAI, so that the application program instructs the UE to use the new PDU session to carry the other service data.
The application server initiates one or more session connections to the client and instructs the client to carry predetermined data over the newly established session. The method can be respectively loaded on different network fragment examples according to the characteristics of the service data, so that the method is more suitable for the transmission of the service data.
The embodiment of the disclosure can realize that one application program simultaneously distributes a plurality of different network fragment instances, realize that one application program simultaneously uses a plurality of different network fragments to bear the data stream thereof, and fully exert the application performance thereof by a plurality of different S-NSSAIs. The user experience is improved.
Fig. 2 is a schematic flowchart of a method for selecting an application network fragment according to a second embodiment of the present disclosure, which is applied to a PCF, and as shown in fig. 2, the method includes:
step S201: receiving a second S-NSSAI sent by an application server and an application identifier of an application program, wherein the second S-NSSAI is obtained by the application server after the UE selects a first S-NSSAI for a certain application program on the application server and creates a PDU session according to the first S-NSSAI, if the fact that data flow in the PDU session needs to use network fragment bearers of at least two different types is identified, a first S-NSSAI used by the PDU session is obtained from the UE, and the second S-NSSAI is determined according to S-NSSAI needed by other service data which are different from data flow characteristics corresponding to the first S-NSSAI in the data flow of the PDU session;
step S202: acquiring NSSAI ordered by the application server according to the application identifier;
step S203: judging whether the second S-NSSAI exists in NSSAIs ordered by the application server;
step S204: if yes, sending the second S-NSSAI to an AMF providing service for the UE, instructing the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by an application server and the UE according to the second S-NSSAI, and returning the network fragment instance corresponding to the second S-NSSAI to the PCF;
step S205: and returning first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI to the application server, so that after the application server receives the first confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the second S-NSSAI, and the UE is instructed to use the new PDU session to carry other service data.
The PCF can provide extra S-NSSAI for the application program in a targeted manner according to the request of the application server, so that the application program can simultaneously use a plurality of different network fragments to bear the data stream of the application program, the application performance of the application program is fully exerted, and the user experience is improved.
Further, the method further comprises:
if the second S-NSSAI is not in the NSSAIs subscribed by the application server, selecting one S-NSSAI closest to the network fragmentation characteristic of the second S-NSSAI from the NSSAIs as a third S-NSSAI to be sent to the AMF, indicating the AMF to select a corresponding network fragmentation instance for a new PDU session to be initiated by the application server and the UE according to the third S-NSSAI, and returning the network fragmentation instance corresponding to the third S-NSSAI to the PCF;
and returning second confirmation information which can use the network fragment instance corresponding to the third S-NSSAI to the application server, so that after the application server receives the second confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the third S-NSSAI, and the application program is instructed to use the new PDU session to carry other service data. When the NSSAI subscribed by the application server does not have the second S-NSSAI additionally required by the application program service data, the PCF provides the third S-NSSAI with the closest corresponding network fragmentation characteristic for the application server, so that the requirement of the application program can be met to the maximum extent.
In order to more clearly and completely describe the technical solution of the present disclosure, a third embodiment of the present disclosure further provides an application program network segment selection method, as shown in fig. 3, where the method includes:
step 1: the UE selects a piece of single network fragmentation selection auxiliary information (denoted as S-NSSAI-1) for the application program on the UE, and accordingly creates (or selects) a PDU session for carrying data transmission between the application program and the application program server;
step 2: the application server identifies that the data flow in the PDU session in the step 1 needs to use at least two different types of network fragments to ensure the user service experience;
and step 3: the application server requests the single network fragment selection auxiliary information used by the PDU session in the step 1 from the application program;
and 4, step 4: the application program acquires the single network fragmentation selection auxiliary information used by the PDU session in the step 1 from the UE, wherein the auxiliary information is S-NSSAI-1;
and 5: the application program sends S-NSSAI-1 to an application server;
step 6: the application server sends single network fragment selection auxiliary information (marked as S-NSSAI-2), UE identification (user mobile phone number and the like) and application identification (on the UE) required by service data which is different from the PDU session data stream characteristic in the step 1 to the PCF through the NEF;
and 7: PCF inquires NSSAI subscribed by the service end of the application from UDR according to the application identifier;
and 8: the UDR returns NSSAI subscribed by the application server to the PCF;
and step 9: PCF checks whether the S-NSSAI marked as S-NSSAI-2 is in the NSSAI subscribed by the application server; if the network fragment is in the S-NSSAI-2, selecting a single network fragment selection auxiliary information (denoted as S-NSSAI-3) which is closest to the network fragment characteristic of the S-NSSAI-2 from the NSSAI; sending the finally selected single network fragment selection auxiliary information to an AMF providing service for the UE, and indicating the AMF to select a network fragment instance corresponding to the finally selected single network fragment selection auxiliary information (S-NSSAI-2 or S-NSSAI-3) for a PDU session to be initiated by an application server and the UE;
step 10: AMF selects corresponding core network fragmentation example according to single network fragmentation selection auxiliary information (namely S-NSSAI-2 or S-NSSAI-3) from PCF, and instructs RAN to select wireless network fragmentation example;
step 11: AMF returns confirmation message to PCF;
step 12: PCF, through NEF, returns confirmation message to application server;
step 13: the application server initiates a PDU session to the UE; after the session is established, the application server instructs an application on the UE to transmit predetermined service data using the newly created session, and the application instructs the UE to transmit the portion of data using the newly created session.
Description of the drawings:
in this embodiment, NSSAI is a set of one or more S-NSSAIs;
in step 9, if the S-NSSAI-2 is not in the NSSAI returned by the UDR, the PCF may also skip the subsequent steps of step 9, as well as steps 10 and 11, and directly return a request failure message to the application server. Namely, an S-NSSAI-3 is not selected for the application server;
if the application server is the server of the operator's own, or the server the operator considers trusted, then steps 6 and 12 may not go through NEF;
the PDU session in step 1 may carry a data stream mainly downloaded from a video stream, such as a camera surveillance video;
the PDU session in step 13 may carry a control signaling flow for performing real-time operation on the camera pan-tilt;
the two data streams in step 1 and step 13 obviously have different requirements on bandwidth and delay. The video stream downloading needs larger bandwidth but is not sensitive to time delay; control flow has relatively small bandwidth requirements but is delay sensitive.
In step 6, the application server may request multiple different S-NSSAIs from the PCF at the same time, as needed (for example, in an ongoing data session, multiple network segments with different characteristics are needed), instead of being limited to 1.
Fig. 4 is an architecture diagram of an application server according to a fourth embodiment of the present disclosure, as shown in fig. 4, including:
the identification and acquisition module 11 is configured to, after the UE selects the first single network segment selection auxiliary information S-NSSAI for an application thereon and creates a protocol data unit PDU session based on the first single network segment selection auxiliary information S-NSSAI, acquire, from the UE, the first S-NSSAI used by the PDU session if the application server identifies that a data stream of the PDU session needs to use at least two different types of network segment bearers;
a first sending module 12 configured to send a second S-NSSAI required by other service data in the data stream of the PDU session, which is different from the data stream characteristic corresponding to the first S-NSSAI, and the application identifier of the application program is sent to a policy control function entity PCF, so that the PCF obtains the network fragment selection auxiliary information NSSAI ordered by the application server according to the application identifier, if the NSSAI ordered by the application server is judged to have the second S-NSSAI, it is sent to the access and mobility management function entity AMF which is serving the UE, and instruct the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server with the UE according to the second S-NSSAI, then, first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI is returned to the application server through the PCF;
a first receiving module 13 configured to receive the first acknowledgement information;
a session module 14, configured to initiate a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI after the first receiving module 13 receives the first acknowledgement information, and instruct the UE to use the new PDU session to carry the other service data.
Further, the first sending module 12 is further configured to, after sending the second S-NSSAI and the application identifier of the application program to the PCF, if the PCF determines that there is no second S-NSSAI in the NSSAIs subscribed by the application server, enable the PCF to select, from the NSSAIs, one S-NSSAI that is closest to the network fragmentation characteristic of the second S-NSSAI as a third S-NSSAI to send to the AMF, and instruct the AMF to select, according to the third S-NSSAI, a network fragmentation instance corresponding to a new PDU session to be initiated by the application server and associated with the UE, and then return, to the application server via the PCF, second confirmation information that the network fragmentation instance corresponding to the third S-NSSAI can be used;
the first receiving module 13 is further configured to receive the second acknowledgement information;
the session module 14 is further configured to, after the first receiving module 13 receives the second acknowledgment information, initiate a new PDU session to the UE according to the network fragment instance corresponding to the third S-NSSAI, and instruct the application program to use the new PDU session to carry the other service data.
Further, if the identifying and acquiring module 11 determines that the data stream characteristics of the other service data are multiple, and each data stream characteristic corresponds to a second S-NSSAI, the number of the second S-NSSAIs sent to the PCF by the first sending module 12 is multiple.
Further, the session module 14 is specifically configured to:
after the new PDU session is established, instructing the application program on the UE to use the new PDU session to carry other service data with different data flow characteristics corresponding to the first S-NSSAI, so that the application program instructs the UE to use the new PDU session to carry the other service data.
Fig. 5 is an architecture diagram of a PCF according to a fifth embodiment of the present disclosure, as shown in fig. 5, including:
a second receiving module 21, configured to receive a second single network segment selection auxiliary information S-NSSAI sent by an application server, and an application identifier of an application program, where the second S-NSSAI is obtained by the application server after the UE selects a first S-NSSAI for an application program on the application server and creates a protocol data unit PDU session according to the first S-NSSAI, and if it is identified that a data stream in the PDU session needs to use at least two different types of network segment bearers, a first S-NSSAI used by the PDU session is obtained from the UE, and is determined according to S-NSSAI needed by other service data different from a data stream characteristic corresponding to the first S-NSSAI in the data stream of the PDU session;
an obtaining module 22, configured to obtain, according to the application identifier, network fragment selection auxiliary information NSSAI ordered by the application server;
a determining module 23, configured to determine whether there is the second S-NSSAI in the NSSAIs subscribed by the application server;
a second sending module 24, configured to, if the determining module 23 determines that there is the second S-NSSAI in the NSSAIs subscribed by the application server, send the second S-NSSAI to an AMF that is a mobility management function entity providing a service for the UE, and instruct the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server and associated with the UE according to the second S-NSSAI, and return the network fragment instance corresponding to the second S-NSSAI to the PCF; and the number of the first and second groups,
and returning first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI to the application server, so that after the application server receives the first confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the second S-NSSAI, and the UE is instructed to use the new PDU session to carry other service data.
Further, the PCF further comprises a selection module 25;
the selecting module 25 is configured to, if the determining module 23 determines that the second S-NSSAI is not present in the NSSAIs subscribed by the application server, select one S-NSSAI from the NSSAIs that is closest to the network fragmentation characteristic of the second S-NSSAI as a third S-NSSAI, enable the second sending module 24 to send the third S-NSSAI to the AMF, instruct the AMF to select a corresponding network fragmentation instance for a new PDU session to be initiated by the application server with the UE according to the third S-NSSAI, and return the network fragmentation instance corresponding to the third S-NSSAI to the PCF;
the second sending module 24 is further configured to return second acknowledgement information that can use the network fragment instance corresponding to the third S-NSSAI to the application server, so that after receiving the second acknowledgement information, the application server initiates a new PDU session to the UE according to the network fragment instance corresponding to the third S-NSSAI, and instructs the application program to use the new PDU session to carry the other service data.
The application server and the PCF in the embodiments of the present disclosure are used to implement the application program network segment selection method in the first to third embodiments of the method, so the description is simpler, and reference may be specifically made to the related description in the first and second embodiments of the method, and details are not described here again.
Furthermore, as shown in fig. 6, a sixth embodiment of the present disclosure further provides an electronic device, which includes a memory 10 and a processor 20, where the memory 10 stores a computer program, and when the processor 20 runs the computer program stored in the memory 10, the processor 20 executes the above-mentioned various possible application network partition selecting methods.
The memory 10 is connected to the processor 20, the memory 10 may be a flash memory, a read-only memory or other memories, and the processor 20 may be a central processing unit or a single chip microcomputer.
In addition, the embodiments of the present disclosure also provide a computer-readable storage medium, in which computer-executable instructions are stored, and when at least one processor of the user equipment executes the computer-executable instructions, the user equipment executes the above-mentioned various possible methods.
Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC (Application Specific Integrated Circuit). Additionally, the ASIC may reside in user equipment. Of course, the processor and the storage medium may reside as discrete components in a communication device.
It is to be understood that the above embodiments are merely exemplary embodiments that are employed to illustrate the principles of the present disclosure, and that the present disclosure is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the disclosure, and these are to be considered as the scope of the disclosure.

Claims (10)

1. A method for selecting application program network fragments is applied to an application server, and the method comprises the following steps:
when UE selects first single network fragment selection auxiliary information S-NSSAI for a certain application program on the UE and creates a Protocol Data Unit (PDU) session according to the auxiliary information S-NSSAI, if an application server identifies that a data stream of the PDU session needs to use at least two different types of network fragment bearers, acquiring first S-NSSAI used by the PDU session from the UE;
sending a second S-NSSAI required by other service data different from the data flow characteristics corresponding to the first S-NSSAI in the data flow of the PDU session and an application identifier of the application program to a policy control function entity PCF, so that the PCF obtains network fragment selection auxiliary information NSSAI ordered by an application server according to the application identifier, if the second S-NSSAI is judged to exist in the NSSAI ordered by the application server, the second S-NSSAI is sent to an access and mobility management function entity AMF providing service for UE, and the AMF is indicated to select a corresponding network fragment instance for a new PDU session to be initiated by the application server and corresponding to the UE according to the second S-NSSAI, and then first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI is returned to the application server through the PCF;
and after receiving the first confirmation information, initiating a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI, and indicating the UE to use the new PDU session to carry other service data.
2. The method of claim 1, further comprising:
after sending the second S-NSSAI and the application identifier of the application program to the PCF, if the PCF determines that there is no second S-NSSAI in the NSSAIs subscribed by the application server, the PCF selects an S-NSSAI from the NSSAIs that is closest to the network fragmentation characteristic of the second S-NSSAI as a third S-NSSAI to send to the AMF, and instructs the AMF to select a corresponding network fragmentation instance for a new PDU session with the UE to be initiated by the application server according to the third S-NSSAI, and then returns second confirmation information that the network fragmentation instance corresponding to the third S-NSSAI can be used to the application server through the PCF;
and after receiving the second confirmation information, initiating a new PDU session to the UE according to the network fragment instance corresponding to the third S-NSSAI, and indicating the application program to use the new PDU session to carry the other service data.
3. The method of claim 1, wherein the other service data has a plurality of data flow characteristics, and each data flow characteristic corresponds to one second S-NSSAI, and the number of second S-NSSAIs sent to the PCF is plural.
4. The method of claim 1, wherein the instructing the UE to use the new PDU session to carry the other traffic data comprises:
after the new PDU session is established, instructing the application program on the UE to use the new PDU session to carry other service data with different data flow characteristics corresponding to the first S-NSSAI, so that the application program instructs the UE to use the new PDU session to carry the other service data.
5. A method for selecting application program network fragments is applied to a policy control function entity (PCF), and comprises the following steps:
receiving second single network fragment selection auxiliary information S-NSSAI sent by an application server and an application identifier of an application program, wherein after the second S-NSSAI is selected by the application server for a certain application program on the UE and a Protocol Data Unit (PDU) session is established according to the first S-NSSAI, if the fact that data streams in the PDU session need to use at least two different types of network fragment bearers is identified, a first S-NSSAI used by the PDU session is obtained from the UE and determined according to the S-NSSAI needed by other service data which are different from data stream characteristics corresponding to the first S-NSSAI in the data streams of the PDU session;
acquiring network fragment selection auxiliary information NSSAI ordered by the application server according to the application identifier;
judging whether the second S-NSSAI exists in NSSAIs ordered by the application server;
if so, sending the second S-NSSAI to an access and mobility management function (AMF) entity providing service for the UE, and indicating the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by an application server and the UE according to the second S-NSSAI, and returning the network fragment instance corresponding to the second S-NSSAI to the PCF;
and returning first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI to the application server, so that after the application server receives the first confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the second S-NSSAI, and the UE is instructed to use the new PDU session to carry other service data.
6. The method of claim 5, further comprising:
if the second S-NSSAI is not in the NSSAIs subscribed by the application server, selecting one S-NSSAI closest to the network fragmentation characteristic of the second S-NSSAI from the NSSAIs as a third S-NSSAI to be sent to the AMF, indicating the AMF to select a corresponding network fragmentation instance for a new PDU session to be initiated by the application server and the UE according to the third S-NSSAI, and returning the network fragmentation instance corresponding to the third S-NSSAI to the PCF;
and returning second confirmation information which can use the network fragment instance corresponding to the third S-NSSAI to the application server, so that after the application server receives the second confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the third S-NSSAI, and the application program is instructed to use the new PDU session to carry other service data.
7. An application server, comprising:
the device comprises an identification and acquisition module, a Protocol Data Unit (PDU) session establishment module and a processing module, wherein the identification and acquisition module is arranged for acquiring a first network fragment selection auxiliary information S-NSSAI used by the PDU session from a UE (user equipment) if an application server identifies that a data stream of the PDU session needs to use at least two different types of network fragment bearers after the UE selects the first single network fragment selection auxiliary information S-NSSAI for a certain application program on the UE and establishes the PDU session according to the auxiliary information S-NSSAI;
a first sending module configured to send a second S-NSSAI required by other service data different from the data flow characteristic corresponding to the first S-NSSAI in the data flow of the PDU session, and the application identifier of the application program is sent to a policy control function entity PCF, so that the PCF obtains the network fragment selection auxiliary information NSSAI ordered by the application server according to the application identifier, if the NSSAI ordered by the application server is judged to have the second S-NSSAI, it is sent to the access and mobility management function entity AMF which is serving the UE, and instruct the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server with the UE according to the second S-NSSAI, then, first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI is returned to the application server through the PCF;
a first receiving module configured to receive the first acknowledgement information;
and the session module is configured to initiate a new PDU session to the UE according to the network fragment instance corresponding to the second S-NSSAI after the first receiving module receives the first acknowledgment information, and instruct the UE to use the new PDU session to carry the other service data.
8. A policy control function, PCF, comprising:
a second receiving module, configured to receive a second single network segment selection auxiliary information S-NSSAI sent by an application server, and an application identifier of an application program, where the second S-NSSAI is obtained by the application server after the UE selects a first S-NSSAI for an application program on the UE and creates a PDU session based on the first S-NSSAI, and if it is recognized that a data stream in the PDU session needs to use at least two different types of network segment bearers, a first S-NSSAI used by the PDU session is obtained from the UE, and the first S-NSSAI is determined according to S-NSSAI required by other service data that is different from a data stream characteristic corresponding to the first S-NSSAI in the data stream of the PDU session;
the acquisition module is configured to acquire network fragment selection auxiliary information NSSAI ordered by the application server according to the application identifier;
a judging module configured to judge whether the second S-NSSAI exists among NSSAIs subscribed by the application server;
a second sending module, configured to send the second S-NSSAI to an AMF that is providing service for the UE if the determining module determines that the second S-NSSAI is included in the NSSAIs subscribed by the application server, and instruct the AMF to select a corresponding network fragment instance for a new PDU session to be initiated by the application server and for the UE according to the second S-NSSAI, and return the network fragment instance corresponding to the second S-NSSAI to PCF; and the number of the first and second groups,
and returning first confirmation information which can use the network fragment instance corresponding to the second S-NSSAI to the application server, so that after the application server receives the first confirmation information, a new PDU session for the UE is initiated according to the network fragment instance corresponding to the second S-NSSAI, and the UE is instructed to use the new PDU session to carry other service data.
9. An electronic device comprising a memory and a processor, the memory having a computer program stored therein, the processor, when executing the computer program stored in the memory, performing the application network slice selection method of any of claims 1-4 and claims 5-6.
10. A computer-readable storage medium, comprising: computer program which, when run on a computer, causes the computer to perform the application network slice selection method of any one of claims 1-4 and claims 5-6.
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