Message processing method and device, proxy call session control function network element, message processing system, readable storage medium and computer program product

Abstract

The invention relates to a message processing method and device, a proxy call session control function network element, a message processing system, a readable storage medium and a computer program product. The method comprises the following steps: a proxy call session control function network element applied to a calling network receives an IMS session invitation message sent by calling UE, and identifies a network access type of the calling UE; processing the IMS session invitation message according to the network access type of the calling UE; and forwarding the processed IMS session invitation message to a called network to establish an IMS session. By adopting the method, the service stability of the IMS network can be improved.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to a message processing method, a message processing device, a proxy call session control function network element of a calling network, a proxy call session control function network element of a called network, a message processing system, a computer-readable storage medium, and a computer program product. Background Art

[0002] IMS DC, or IMS (IP Multimedia Subsystem) data channel (DC), is used to carry text, pictures, files, menus and other data information between the two parties of a call. IMS DC can be divided into two types: one is the boot data channel established between the terminal and the network, which is used for DC application downloads, DC application list updates, and DC application version updates; the other is the application data channel established between terminals or between terminals and the network, which is used for data or message transmission between DC applications at both ends.

[0003] With the development of the integrated space-ground network, user terminals (UE) can access the IMS network through various networks such as the terrestrial network or the non-terrestrial network (NTN). With the development of IMS DC services, users' demand for network channel bandwidth will increase significantly. Traditional technologies are prone to unstable IMS services when UE is in access scenarios of specific types of networks.

[0004] Therefore, the traditional technology has the problem of low stability of IMS services. Summary of the invention

[0005] Based on this, it is necessary to provide a message processing method, a message processing device, a proxy call session control function network element of a calling network, a proxy call session control function network element of a called network, a message processing system, a computer-readable storage medium and a computer program product to address the above technical problems.

[0006] In a first aspect, the present application provides a message processing method, which is applied to a proxy call session control function network element of a calling network, and the method includes:

[0007] receiving an IMS session invite message sent by a calling UE, and identifying a network access type of the calling UE;

[0008] Processing the IMS session invite message according to the network access type of the calling UE;

[0009] The processed IMS session invitation message is forwarded to the called network to establish an IMS session.

[0010] In one of the embodiments, identifying the network access type of the calling UE includes:

[0011] Parsing the PANI header field in the IMS session invitation message to obtain the network type identification information carried by the IMS session invitation message;

[0012] The network access type of the calling UE is determined according to the network type identification information carried in the IMS session invite message.

[0013] In one of the embodiments, determining the network access type of the calling UE according to the network type identification information carried by the IMS session invite message includes:

[0014] When the network type identification information carried in the PANI header field of the IMS session invite message is one of “NR(LEO)”, “NR(MEO)”, “NR(GEO)”, and “NR(OTHERSAT)”, determining that the network access type of the calling UE is a non-terrestrial network;

[0015] When the network type identification information carried in the PANI header field of the IMS session invitation message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the calling UE is a terrestrial network.

[0016] In one of the embodiments, identifying the network access type of the calling UE includes:

[0017] Querying the policy control function network element to obtain the network type identification information of the calling UE;

[0018] The network access type of the calling UE is determined according to the network type identification information of the calling UE returned by the policy control function network element.

[0019] In one of the embodiments, determining the network access type of the calling UE according to the network type identification information of the calling UE returned by the policy control function network element includes:

[0020] When the network type identification information of the calling UE returned by the policy control function network element is one of “NR(LEO)”, “NR(MEO)”, “NR(GEO)”, and “NR(OTHERSAT)”, determining that the network access type of the calling UE is a non-terrestrial network;

[0021] When the network type identification information of the calling UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the calling UE is a terrestrial network.

[0022] In one of the embodiments, the processing of the IMS session invite message according to the network access type of the calling UE includes:

[0023] If the network access type of the calling UE is a non-terrestrial network, determining whether the IMS session invite message carries a data channel capability tag and data channel provision information;

[0024] If the IMS session invite message carries the data channel capability label and the data channel provision information, the data channel capability label and the data channel provision information carried by the IMS session invite message are deleted to obtain the processed IMS session invite message.

[0025] In a second aspect, the present application further provides a message processing method, which is applied to a proxy call session control function network element of a called network, and the method includes:

[0026] receiving an IMS session response message sent by the called UE, and identifying a network access type of the called UE;

[0027] Processing the IMS session response message according to the network access type of the called UE;

[0028] The processed IMS session response message is forwarded to the calling network to establish an IMS session.

[0029] In one of the embodiments, identifying the network access type of the called UE includes:

[0030] Parsing the PANI header field in the IMS session response message to obtain the network type identification information carried by the IMS session response message;

[0031] The network access type of the called UE is determined according to the network type identification information carried in the IMS session response message.

[0032] In one of the embodiments, determining the network access type of the called UE according to the network type identification information carried by the IMS session response message includes:

[0033] When the network type identification information carried in the PANI header field of the IMS session response message is one of “NR(LEO)”, “NR(MEO)”, “NR(GEO)”, and “NR(OTHERSAT)”, determining that the network access type of the called UE is a non-terrestrial network;

[0034] When the network type identification information carried in the PANI header field of the IMS session response message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the called UE is a terrestrial network.

[0035] In one of the embodiments, identifying the network access type of the called UE includes:

[0036] Querying the policy control function network element to obtain the network type identification information of the called UE;

[0037] The network access type of the called UE is determined according to the network type identification information of the called UE returned by the policy control function network element.

[0038] In one of the embodiments, determining the network access type of the called UE according to the network type identification information of the called UE returned by the policy control function network element includes:

[0039] When the network type identification information of the called UE returned by the policy control function network element is one of “NR(LEO)”, “NR(MEO)”, “NR(GEO)”, and “NR(OTHERSAT)”, determining that the network access type of the called UE is a non-terrestrial network;

[0040] When the network type identification information of the called UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the called UE is a terrestrial network.

[0041] In one of the embodiments, the processing of the IMS session response message according to the network access type of the called UE includes:

[0042] If the network access type of the called UE is a non-terrestrial network, determining whether the IMS session response message carries a data channel capability tag and data channel response information;

[0043] If the IMS session response message carries the data channel capability label and the data channel response information, the data channel capability label and the data channel response information carried by the IMS session response message are deleted to obtain the processed IMS session response message.

[0044] In a third aspect, the present application further provides a message processing device, which is applied to a proxy call session control function network element of a calling network, and the device includes:

[0045] A first identification module, configured to receive an IMS session invitation message sent by a calling UE, and identify a network access type of the calling UE;

[0046] A first processing module, configured to process the IMS session invite message according to the network access type of the calling UE;

[0047] The first sending module is used to forward the processed IMS session invitation message to the called network to establish an IMS session.

[0048] In a fourth aspect, the present application further provides a message processing device, which is applied to a proxy call session control function network element of a called network, and the device includes:

[0049] A second identification module is used to receive an IMS session response message sent by the called UE and identify the network access type of the called UE;

[0050] A second processing module, configured to process the IMS session response message according to the network access type of the called UE;

[0051] The second sending module is used to forward the processed IMS session response message to the calling network to establish an IMS session.

[0052] In a fifth aspect, the present application further provides a proxy call session control function network element of a calling network, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0053] In a sixth aspect, the present application further provides a proxy call session control function network element of a called network, comprising a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the above method when executing the computer program.

[0054] In a seventh aspect, the present application further provides a message processing system, comprising a proxy call session control function network element of a calling network as described above, and a proxy call session control function network element of a called network as described above.

[0055] In an eighth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0056] In a ninth aspect, the present application also provides a computer program product, including a computer program, which implements the steps of the above method when executed by a processor.

[0057] The above-mentioned message processing method, device, proxy call session control function network element, message processing system, readable storage medium and computer program product, the proxy call session control function network element of the calling network receives the IMS session invitation message sent by the calling UE, identifies the network access type of the calling UE, and processes the IMS session invitation message according to the network access type of the calling UE; and then forwards the processed IMS session invitation message to the called network to establish an IMS session; in this way, it is possible to identify the network access type of the calling UE after receiving the IMS session invitation message sent by the calling UE, and adaptively process the IMS session invitation message according to the network access type of the calling UE, so that the stability of the IMS session established by using the processed IMS session invitation message can be more adapted to the current network access type of the calling UE, effectively improving the stability of the IMS service. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0059] Figure 1 An application environment diagram of a message processing method in an embodiment;

[0060] Figure 2 A schematic diagram of a flow chart of a message processing method in an embodiment;

[0061] Figure 3 A schematic diagram of a flow chart of another message processing method in one embodiment;

[0062] Figure 4 is a timing diagram of a message processing method in an embodiment;

[0063] Figure 5 A schematic diagram of a flow chart of a message processing method in another embodiment;

[0064] Figure 6is a flow chart of another message processing method in another embodiment;

[0065] Figure 7 is a timing diagram of another message processing method in one embodiment;

[0066] Figure 8 is a structural block diagram of a message processing device in one embodiment;

[0067] Fig. 9 is a structural block diagram of another message processing device in one embodiment;

[0068] Fig.10 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0069] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0070] The message processing method provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown, the calling UE 102 communicates with the IMS network through the proxy call session control function network element 104 of the calling network; the called UE 106 communicates with the IMS network through the proxy call session control function network element 108 of the called network.

[0071] In actual applications, the proxy call session control function network element 104 of the calling network receives the IMS session invite message sent by the calling UE 102, and identifies the network access type of the calling UE 102; the proxy call session control function network element 104 of the calling network processes the IMS session invite message according to the network access type of the calling UE 102; the proxy call session control function network element 104 of the calling network forwards the processed IMS session invite message to the called network to establish an IMS session.

[0072] After responding to the IMS session invitation message, the called UE 106 may send an IMS session response message to the proxy call session control function network element 108 of the called network; the proxy call session control function network element 108 of the called network receives the IMS session response message sent by the called UE 106, and identifies the network access type of the called UE 106; the proxy call session control function network element 108 of the called network processes the IMS session response message according to the network access type of the called UE 106; the proxy call session control function network element 108 of the called network forwards the processed IMS session response message to the calling network to establish an IMS session.

[0073] UE is the abbreviation of User Equipment, which refers to the terminal equipment used by users to access the communication network and use communication services.

[0074] In an exemplary embodiment, Figure 2 As shown, a message processing method is provided, which is applied to Figure 1 The proxy call session control function network element 104 of the calling network (hereinafter referred to as "the P-CSCF network element of the calling network") is used as an example to illustrate, including the following steps S202 to S206. Among them:

[0075] Step S202: receiving an IMS session invite message sent by the calling UE, and identifying the network access type of the calling UE.

[0076] In a specific implementation, when the calling UE needs to establish an IMS session with the called UE, the calling UE can send an IMS session invitation message, such as a SIP invitation message (SIP Invite message), to the P-CSCF network element of the calling network; the P-CSCF network element of the calling network receives the IMS session invitation message sent by the calling UE, and can identify the network access type of the calling UE and determine whether the network access type of the calling UE is a specific type of network. In practical applications, a specific type of network may refer to a network with limited air interface wireless resources, such as a non-terrestrial network.

[0077] Specifically, the P-CSCF network element of the calling network can identify the network type information carried in the IMS session invitation message, and identify the network access type of the calling UE according to the network type information carried in the session invitation message. Of course, the P-CSCF network element of the calling network can also query the network type identification information of the calling UE through the Policy Control Function (PCF) network element, and identify the network access type of the calling UE based on the network type identification information of the calling UE.

[0078] In actual applications, network access types may include non-terrestrial networks and terrestrial networks. When the calling UE is in a non-terrestrial network access environment, the IMS session invitation message sent by the calling UE carries the type information of accessing the non-terrestrial network. In actual applications, the method for the calling UE to obtain the type information of the non-terrestrial network may include: obtaining it through the satellite ephemeris information of the calling UE, or obtaining it through the NAS (Non-Access Stratum) message of the AMF (Access and Mobility Management Function) network element during the registration process of the calling UE to the 5GC.

[0079] Step S204: Process the IMS session invite message according to the network access type of the calling UE.

[0080] In a specific implementation, when the P-CSCF network element of the calling network determines that the network access type of the calling UE is a non-terrestrial network, the P-CSCF network element of the calling network processes the IMS session invitation message to obtain a processed IMS session invitation message. The processed IMS session invitation message is restricted from calling the DC service of the IMS network. Specifically, the P-CSCF network element of the calling network can delete the information used to call the DC service in the IMS session invitation message, such as the data channel capability label (DC capability label) and the data channel offer information (DC offer information), so that the processed IMS session invitation message is an IMS session invitation message that is restricted from calling the DC service of the IMS network.

[0081] Of course, the P-CSCF network element of the calling network may also add a DC service restriction calling identifier to the IMS session invitation message to control the IMS session between the calling UE and the called UE not to use the DC service through the DC service restriction calling identifier.

[0082] Step S206: forwarding the processed IMS session invitation message to the called network to establish an IMS session.

[0083] After the P-CSCF network element of the calling network obtains the processed IMS session invitation message, the P-CSCF network element of the calling network can send the processed IMS session invitation message to the called network, so as to send the processed IMS session invitation message to the called UE, so as to continue the subsequent IMS session establishment process and establish the IMS session.

[0084] When the network access type of the calling UE is a terrestrial network, the P-CSCF network element of the calling network directly sends the IMS session invitation message sent by the calling UE to the called network, does not process the IMS session invitation message, and establishes an IMS session based on the unprocessed IMS session invitation message.

[0085] In the above message processing method, the proxy call session control function network element of the calling network identifies the network access type of the calling UE by receiving the IMS session invitation message sent by the calling UE, and processes the IMS session invitation message according to the network access type of the calling UE; and then forwards the processed IMS session invitation message to the called network to establish an IMS session; in this way, it is possible to identify the network access type of the calling UE upon receiving the IMS session invitation message sent by the calling UE, and adaptively process the IMS session invitation message according to the network access type of the calling UE, so that the stability of the IMS session established by using the processed IMS session invitation message can be more adapted to the current network access type of the calling UE, thereby effectively improving the stability of the IMS service.

[0086] In an exemplary embodiment, identifying the network access type of the calling UE includes: parsing the PANI header field in the IMS session invitation message to obtain the network type identification information carried by the IMS session invitation message; and determining the network access type of the calling UE according to the network type identification information carried by the IMS session invitation message.

[0087] Among them, the PANI (P - Asserted - Identity) header field is an important component of the SIP (Session Initiation Protocol) message, which is mainly used to clarify the identity of the communication subject in a specific communication scenario.

[0088] The network type identification information may refer to type information used to identify the network currently accessed by the UE. In the case where the network currently accessed by the UE is a non-terrestrial network, the network type identification information may include one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)".

[0089] In a specific implementation, during the process of identifying the network access type of the calling UE, the P-CSCF network element of the calling network can parse the PANI header field in the SIP Invite message (i.e., the IMS session invitation message) sent by the calling UE to obtain the network type identification information carried by the SIP Invite message; then, the P-CSCF network element of the calling network can determine the network access type of the calling UE based on the network type identification information carried by the SIP Invite message.

[0090] Optionally, the process in which the P-CSCF network element of the calling network determines the network access type of the calling UE based on the network type identification information carried by the IMS session invitation message specifically includes: when the network type identification information carried in the PANI header field of the IMS session invitation message is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the calling UE is a non-terrestrial network; when the network type identification information carried in the PANI header field of the IMS session invitation message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the calling UE is a terrestrial network.

[0091] Specifically, when the P-CSCF network element of the calling network determines that the network type identification information carried in the SIP Invite message is any one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", the P-CSCF network element of the calling network determines that the network access type of the calling UE is a non-terrestrial network (NTN); when the P-CSCF network element of the calling network determines that the network type identification information carried in the SIP Invite message is not any one of NR(LEO), NR(MEO), NR(GEO), and NR(OTHERSAT), the P-CSCF network element of the calling network determines that the network access type of the calling UE is a terrestrial network.

[0092] The technical solution of this embodiment configures network type identification information for identifying the network type currently accessed by the UE in the PANI header field in the session invitation message, so that the P-CSCF of the calling network can quickly and accurately identify the current network access type of the calling UE by parsing the PANI header field in the session invitation message.

[0093] In an exemplary embodiment, identifying the network access type of the calling UE includes: querying a policy control function network element to obtain network type identification information of the calling UE; and determining the network access type of the calling UE based on the network type identification information of the calling UE returned by the policy control function network element.

[0094] In a specific implementation, during the process of identifying the network access type of the calling UE, the P-CSCF network element of the calling network may also query the policy control function network element to obtain the network type identification information of the calling UE; specifically, the P-CSCF network element of the calling network may send a network type query request for the calling UE to the policy control function network element; the policy control function network element may receive and respond to the network type query request, and query the network type identification information of the calling UE; the policy control function network element returns the network type identification information of the calling UE to the P-CSCF network element of the calling network; then, the P-CSCF network element of the calling network may determine the network access type of the calling UE based on the network type identification information of the calling UE returned by the policy control function network element.

[0095] Optionally, the process in which the P-CSCF network element of the calling network determines the network access type of the calling UE based on the network type identification information of the calling UE returned by the policy control function network element specifically includes: when the network type identification information of the calling UE returned by the policy control function network element is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the calling UE is a non-terrestrial network; when the network type identification information of the calling UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the calling UE is a terrestrial network.

[0096] In an exemplary embodiment, the IMS session invitation message is processed according to the network access type of the calling UE, including: if the network access type of the calling UE is a non-terrestrial network, determining whether the IMS session invitation message carries a data channel capability tag and data channel provision information; if the IMS session invitation message carries a data channel capability tag and data channel provision information, deleting the data channel capability tag and data channel provision information carried by the IMS session invitation message, and obtaining a processed IMS session invitation message.

[0097] In a specific implementation, the P-CSCF network element of the calling network processes the IMS session invitation message according to the network access type of the calling UE, specifically including: when the P-CSCF network element of the calling network determines that the network access type of the calling UE is a non-terrestrial network, the P-CSCF network element of the calling network can determine whether the IMS session invitation message carries a data channel capability tag and data channel provision information.

[0098] Among them, the P-CSCF network element of the calling network can detect whether the IMS session invitation message carries the DC capability tag and DC offer information. Specifically, the P-CSCF network element of the calling network can determine whether the SIP Invite message (i.e., the IMS session invitation message) carries the DC capability tag by judging the Contact header field of the SIP Invite message; the P-CSCF network element of the calling network can determine whether the DC offer information is carried by judging the media line description information in the SDP offer of the SIP Invite message; when the P-CSCF network element of the calling network detects that the IMS session invitation message carries the DC capability tag and DCoffer information, the P-CSCF network element of the calling network deletes the data channel capability tag and data channel provision information carried by the IMS session invitation message to obtain the processed IMS session invitation message.

[0099] The technical solution of this embodiment can effectively and conveniently realize that the processed IMS session invitation message is restricted from calling the DC service of the IMS network by detecting whether the IMS session invitation message carries the data channel capability tag and the data channel provision information, and deleting the data channel capability tag and the data channel provision information carried by the IMS session invitation message when the IMS session invitation message carries the data channel capability tag and the data channel provision information, so as to restrict the UE's use of the IMS DC service when it is detected that the network type currently connected to the UE is a non-terrestrial network.

[0100] In another embodiment, Figure 3 As shown, a message processing method is provided, which is applied to Figure 1 The proxy call session control function network element 104 of the calling network includes the following steps:

[0101] Step S302: receiving an IMS session invite message sent by the calling UE.

[0102] Step S304: parse the PANI header field in the IMS session invite message to obtain the network type identification information carried in the IMS session invite message.

[0103] Step S306: Determine the network access type of the calling UE according to the network type identification information carried in the IMS session invite message.

[0104] Step S308: If the network access type of the calling UE is a non-terrestrial network, it is determined whether the IMS session invite message carries a data channel capability tag and data channel provision information.

[0105] Step S310: If the IMS session invite message carries the data channel capability tag and the data channel provision information, the data channel capability tag and the data channel provision information carried by the IMS session invite message are deleted to obtain a processed IMS session invite message.

[0106] Step S312: forwarding the processed IMS session invitation message to the called network to establish an IMS session.

[0107] In order to facilitate the understanding of those skilled in the art, Figure 4 A timing diagram of a message processing method is provided exemplarily; it should be noted that the specific limitations of the above steps can refer to the specific limitations of a message processing method above, which will not be repeated here.

[0108] In an exemplary embodiment, Figure 5 As shown, a message processing method is provided, which is applied to Figure 1 Taking the proxy call session control function network element of the called network (hereinafter referred to as "the P-CSCF network element of the called network") 108 as an example, the method includes the following steps S502 to S506. Among them:

[0109] Step S502: receiving an IMS session response message sent by the called UE, and identifying the network access type of the called UE.

[0110] The IMS session response message may refer to a response message sent by the called UE in response to the IMS session invite message. In practical applications, the IMS session response message may be a SIP 18X message; wherein the SIP 18X message belongs to the category of temporary response messages. The SIP 18X message is used to provide feedback on the call progress during the session establishment process. It is an intermediate response to the SIP Invite message, allowing the calling UE to understand the call processing status of the called UE.

[0111] In a specific implementation, the P-CSCF network element of the called network receives an IMS session response message, such as a SIP18X message, sent by the called UE, and identifies the network access type of the called UE, and determines whether the network access type of the called UE is a specific type of network. In practical applications, a specific type of network may refer to a network with limited air interface wireless resources, such as a non-terrestrial network.

[0112] Specifically, the P-CSCF network element of the called network can identify the network type information carried in the IMS session response message, and identify the network access type of the called UE according to the network type information carried in the session response message. Of course, the P-CSCF network element of the called network can also query the network type identification information of the called UE through the Policy Control Function (PCF) network element, and identify the network access type of the called UE based on the network type identification information of the called UE.

[0113] In practical applications, network access types may include non-terrestrial networks and terrestrial networks. When the called UE is in a non-terrestrial network access environment, the IMS session response message sent by the called UE carries the type information of accessing the non-terrestrial network. In practical applications, the method for the called UE to obtain the type information of the non-terrestrial network may include: obtaining it through the satellite ephemeris information of the called UE, or obtaining it through the NAS (Non-Access Stratum) message of the AMF (Access and Mobility Management Function) network element during the registration process of the called UE to the 5GC.

[0114] Step S504: Process the IMS session response message according to the network access type of the called UE.

[0115] In a specific implementation, when the P-CSCF network element of the called network determines that the network access type of the called UE is a non-terrestrial network, the P-CSCF network element of the called network processes the IMS session response message to obtain a processed IMS session response message. The processed IMS session response message is restricted from calling the DC service of the IMS network. Specifically, the P-CSCF of the called network can delete the information used to call the DC service in the IMS session response message so that the processed IMS session response message is an IMS session invitation message that is restricted from calling the DC service of the IMS network.

[0116] Of course, the P-CSCF network element of the called network can also add a DC service restriction calling identifier in the IMS session response message to control the IMS session between the calling UE and the called UE not to call the DC service through the DC service restriction calling identifier.

[0117] Step S506: forward the processed IMS session response message to the calling network to establish an IMS session.

[0118] After obtaining the processed IMS session response message, the P-CSCF network element of the called network can send the processed IMS session response message to the calling network, and forward the processed session response message to the calling UE through the IMS network, so as to send the processed IMS session response message to the calling UE, so as to continue the subsequent IMS session establishment process and establish the IMS session.

[0119] When the network access type of the called UE is a terrestrial network, the P-CSCF network element of the called network sends the IMS session response message sent by the called UE to the calling network, does not process the IMS session response message, and establishes an IMS session based on the unprocessed IMS session response message.

[0120] In the above message processing method, the proxy call session control function network element of the called network identifies the network access type of the called UE by receiving the IMS session response message sent by the called UE, processes the IMS session response message according to the network access type of the called UE, and then forwards the processed IMS session response message to the calling network to establish an IMS session; in this way, it is possible to identify the network access type of the called UE upon receiving the IMS session response message sent by the called UE, and adaptively process the IMS session response message according to the network access type of the called UE, so that the stability of the IMS session established by using the processed IMS session response message can be more adapted to the current network access type of the called UE, thereby effectively improving the stability of the IMS service.

[0121] In an exemplary embodiment, identifying the network access type of the called UE includes: parsing the PANI header field in the IMS session response message to obtain the network type identification information carried by the IMS session response message; and determining the network access type of the called UE according to the network type identification information carried by the IMS session response message.

[0122] In a specific implementation, during the process of identifying the network access type of the called UE, the P-CSCF network element of the called network can parse the PANI header field in the SIP 18X message sent by the called UE to obtain the network type identification information carried by the SIP 18X message; then, the P-CSCF network element of the called network can determine the network access type of the called UE based on the network type identification information carried by the SIP 18X message.

[0123] Optionally, the process in which the P-CSCF network element of the called network determines the network access type of the called UE based on the network type identification information carried by the IMS session response message specifically includes: when the network type identification information carried in the PANI header field of the IMS session response message is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the called UE is a non-terrestrial network; when the network type identification information carried in the PANI header field of the IMS session response message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the called UE is a terrestrial network.

[0124] Specifically, when the P-CSCF network element of the called network determines that the network type identification information carried by the SIP 18X message is any one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", the P-CSCF network element of the called network determines that the network access type of the called UE is a non-terrestrial network (NTN); when the P-CSCF network element of the called network determines that the network type identification information carried by the SIP 18X message is not any one of NR(LEO), NR(MEO), NR(GEO), and NR(OTHERSAT), the P-CSCF network element of the called network determines that the network access type of the called UE is a terrestrial network.

[0125] The technical solution of this embodiment configures network type identification information for identifying the network type currently accessed by the UE in the PANI header field in the session response message, so that the P-CSCF of the called network can quickly and accurately identify the current network access type of the called UE by parsing the PANI header field in the session response message.

[0126] In an exemplary embodiment, identifying the network access type of the called UE includes: querying a policy control function network element to obtain network type identification information of the called UE; and determining the network access type of the called UE according to the network type identification information of the called UE returned by the policy control function network element.

[0127] In a specific implementation, during the process of identifying the network access type of the called UE, the P-CSCF network element of the called network may also query the policy control function network element to obtain the network type identification information of the called UE; specifically, the P-CSCF network element of the called network may send a network type query request for the called UE to the policy control function network element; the policy control function network element may receive and respond to the network type query request, and query the network type identification information of the called UE; the policy control function network element returns the network type identification information of the called UE to the P-CSCF network element of the called network; then, the P-CSCF network element of the called network may determine the network access type of the called UE based on the network type identification information of the called UE returned by the policy control function network element.

[0128] Optionally, the process in which the P-CSCF network element of the called network determines the network access type of the called UE based on the network type identification information of the called UE returned by the policy control function network element specifically includes: when the network type identification information of the called UE returned by the policy control function network element is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the called UE is a non-terrestrial network; when the network type identification information of the called UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the called UE is a terrestrial network.

[0129] In an exemplary embodiment, the IMS session response message is processed according to the network access type of the called UE, including: if the network access type of the called UE is a non-terrestrial network, determining whether the IMS session response message carries a data channel capability tag and data channel response information; if the IMS session response message carries the data channel capability tag and data channel response information, deleting the data channel capability tag and data channel response information carried by the IMS session response message, and obtaining a processed IMS session response message.

[0130] In a specific implementation, the P-CSCF network element of the called network processes the IMS session response message according to the network access type of the called UE, specifically including: when the P-CSCF network element of the called network determines that the network access type of the called UE is a non-terrestrial network, the P-CSCF network element of the called network can determine whether the IMS session invitation message carries a data channel capability tag (i.e., a DC capability tag) and data channel provision information (i.e., DC answer information).

[0131] Among them, the P-CSCF network element of the called network can detect whether the IMS session response message carries the DC capability tag and DC answer information. Specifically, the P-CSCF network element of the called network determines whether the SIP 18X message (i.e., the IMS session response message) carries the DC capability tag by judging the Contact header field of the SIP 18X message; the P-CSCF of the called network determines whether the SIP 18X message carries the DC answer information by judging the media line description information in the SDP answer of the SIP 18X message; when the P-CSCF network element of the called network detects that the IMS session response message carries the DC capability tag and DCanswer information, the P-CSCF of the called network deletes the DC capability tag and DCanswer information carried by the IMS session response message to obtain the processed IMS session response message.

[0132] The technical solution of this embodiment can effectively and conveniently implement the capability of the processed IMS session response message to be restricted to call the DC service of the IMS network by detecting whether the IMS session response message carries the data channel capability label and the data channel response information, and deleting the data channel capability label and the data channel response information carried by the IMS session response message when the IMS session response message carries the data channel capability label and the data channel response information, so as to restrict the UE's use of the IMS DC service when it is detected that the network type currently accessed by the UE is a non-terrestrial network.

[0133] In another embodiment, Figure 6 As shown, a message processing method is provided, which is applied to Figure 1 The proxy call session control function network element 108 of the called network includes the following steps:

[0134] Step S602: receiving an IMS session response message sent by the called UE.

[0135] Step S604: parse the PANI header field in the IMS session response message to obtain the network type identification information carried in the IMS session response message.

[0136] Step S606: Determine the network access type of the called UE according to the network type identification information carried in the IMS session response message.

[0137] Step S608: If the network access type of the called UE is a non-terrestrial network, it is determined whether the IMS session response message carries a data channel capability tag and data channel response information.

[0138] Step S610: If the IMS session response message carries the data channel capability label and the data channel response information, the data channel capability label and the data channel response information carried by the IMS session response message are deleted to obtain a processed IMS session response message.

[0139] Step S612: forward the processed IMS session response message to the calling network to establish an IMS session.

[0140] In order to facilitate the understanding of those skilled in the art, Figure 7 A timing diagram of a message processing method is provided exemplarily; it should be noted that the specific limitations of the above steps can refer to the specific limitations of a message processing method above, which will not be repeated here.

[0141] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0142] Based on the same inventive concept, the embodiment of the present application also provides a message processing device for implementing the message processing method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in the one or more message processing device embodiments provided below can refer to the limitations on the message processing method above, and will not be repeated here.

[0143] In an exemplary embodiment, Figure 8 As shown, a message processing device is provided, which is applied to a proxy call session control function network element of a calling network, including:

[0144] A first identification module 810 is used to receive an IMS session invitation message sent by a calling UE and identify a network access type of the calling UE;

[0145] A first processing module 820, configured to process the IMS session invite message according to the network access type of the calling UE;

[0146] The first sending module 830 is configured to forward the processed IMS session invitation message to the called network to establish an IMS session.

[0147] In one of the embodiments, the first identification module 810 is specifically used to parse the PANI header field in the IMS session invitation message to obtain the network type identification information carried by the IMS session invitation message; and determine the network access type of the calling UE according to the network type identification information carried by the IMS session invitation message.

[0148] In one of the embodiments, the first identification module 810 is specifically used to determine that the network access type of the calling UE is a non-terrestrial network when the network type identification information carried in the PANI header field of the IMS session invitation message is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)"; when the network type identification information carried in the PANI header field of the IMS session invitation message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determine that the network access type of the calling UE is a terrestrial network.

[0149] In one of the embodiments, the first identification module 810 is specifically used to query the policy control function network element to obtain the network type identification information of the calling UE; and determine the network access type of the calling UE according to the network type identification information of the calling UE returned by the policy control function network element.

[0150] In one of the embodiments, the first identification module 810 is specifically used to determine that the network access type of the calling UE is a non-terrestrial network when the network type identification information of the calling UE returned by the policy control function network element is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)"; and determine that the network access type of the calling UE is a terrestrial network when the network type identification information of the calling UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)".

[0151] In one of the embodiments, the first processing module 820 is specifically used to determine whether the IMS session invitation message carries a data channel capability label and data channel provision information if the network access type of the calling UE is a non-terrestrial network; if the IMS session invitation message carries a data channel capability label and data channel provision information, delete the data channel capability label and data channel provision information carried by the IMS session invitation message to obtain the processed IMS session invitation message.

[0152] In an exemplary embodiment, Fig. 9 As shown, a message processing device is provided, which is applied to a proxy call session control function network element of a called network, including:

[0153] The second identification module 910 is used to receive an IMS session response message sent by the called UE and identify the network access type of the called UE;

[0154] A second processing module 920 is used to process the IMS session response message according to the network access type of the called UE;

[0155] The second sending module 930 is configured to forward the processed IMS session response message to the calling network to establish an IMS session.

[0156] In one of the embodiments, the second identification module 910 is specifically used to parse the PANI header field in the IMS session response message to obtain the network type identification information carried by the IMS session response message; and determine the network access type of the called UE according to the network type identification information carried by the IMS session response message.

[0157] In one of the embodiments, the second identification module 910 is specifically used to determine that the network access type of the called UE is a non-terrestrial network when the network type identification information carried in the PANI header field of the IMS session response message is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)"; and when the network type identification information carried in the PANI header field of the IMS session response message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determine that the network access type of the called UE is a terrestrial network.

[0158] In one of the embodiments, the second identification module 910 is specifically used to query the policy control function network element to obtain the network type identification information of the called UE; and determine the network access type of the called UE according to the network type identification information of the called UE returned by the policy control function network element.

[0159] In one of the embodiments, the second identification module 910 is specifically used to determine that the network access type of the called UE is a non-terrestrial network when the network type identification information of the called UE returned by the policy control function network element is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)"; and when the network type identification information of the called UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determine that the network access type of the called UE is a terrestrial network.

[0160] In one of the embodiments, the second processing module 920 is specifically used to determine whether the IMS session response message carries a data channel capability label and data channel response information if the network access type of the called UE is a non-terrestrial network; if the IMS session response message carries a data channel capability label and data channel response information, delete the data channel capability label and data channel response information carried by the IMS session response message to obtain the processed IMS session response message.

[0161] Each module in the above message processing device can be implemented in whole or in part by software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module above.

[0162] In an exemplary embodiment, a computer device is provided. The computer device may be a proxy call session control function network element of a calling network or a proxy call session control function network element of a called network. The internal structure diagram thereof may be as shown in FIG. Fig.10 As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a message processing method is implemented.

[0163] Those skilled in the art will understand that Fig.10 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0164] In one embodiment, a proxy call session control function network element of a calling network is provided, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above-mentioned message processing method. The steps of the message processing method here may be the steps of the message processing method in each of the above-mentioned embodiments.

[0165] In one embodiment, a proxy call session control function network element of a called network is provided, comprising a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the processor executes the steps of the above-mentioned message processing method. The steps of the message processing method here may be the steps of the message processing method in each of the above-mentioned embodiments.

[0166] In one embodiment, a message processing system is provided. The message processing system includes a proxy call session control function network element of a calling network and a proxy call session control function network element of a called network.

[0167] In one embodiment, a computer-readable storage medium is provided, which stores a computer program. When the computer program is executed by a processor, the processor executes the steps of the above-mentioned message processing method. The steps of the message processing method here can be the steps of the message processing method in each of the above-mentioned embodiments.

[0168] In one embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, causes the processor to execute the steps of the above-mentioned message processing method. The steps of the message processing method here may be the steps of the message processing method in each of the above-mentioned embodiments.

[0169] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0170] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magneto resistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0171] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0172] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A message processing method, characterized in that: A proxy call session control function network element applied to a calling network, the method comprising: receiving an IMS session invite message sent by a calling UE, and identifying a network access type of the calling UE; Processing the IMS session invite message according to the network access type of the calling UE; The processed IMS session invitation message is forwarded to the called network to establish an IMS session.

2. The method according to claim 1, characterized in that The identifying the network access type of the calling UE includes: Parsing the PANI header field in the IMS session invitation message to obtain the network type identification information carried by the IMS session invitation message; The network access type of the calling UE is determined according to the network type identification information carried in the IMS session invite message.

3. The method according to claim 2, characterized in that The determining, according to the network type identification information carried by the IMS session invite message, the network access type of the calling UE includes: When the network type identification information carried in the PANI header field of the IMS session invite message is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the calling UE is a non-terrestrial network; When the network type identification information carried in the PANI header field of the IMS session invite message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the calling UE is a terrestrial network.

4. The method according to claim 1, characterized in that The identifying the network access type of the calling UE includes: Querying the policy control function network element to obtain the network type identification information of the calling UE; The network access type of the calling UE is determined according to the network type identification information of the calling UE returned by the policy control function network element.

5. The method according to claim 4, characterized in that The determining the network access type of the calling UE according to the network type identification information of the calling UE returned by the policy control function network element includes: When the network type identification information of the calling UE returned by the policy control function network element is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the calling UE is a non-terrestrial network; When the network type identification information of the calling UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the calling UE is a terrestrial network.

6. The method according to claim 1, characterized in that The processing, according to the network access type of the calling UE, of the IMS session invite message includes: If the network access type of the calling UE is a non-terrestrial network, determining whether the IMS session invite message carries a data channel capability tag and data channel provision information; If the IMS session invite message carries the data channel capability label and the data channel provision information, the data channel capability label and the data channel provision information carried by the IMS session invite message are deleted to obtain the processed IMS session invite message.

7. A message processing method, characterized in that: A proxy call session control function network element applied to a called network, the method comprising: receiving an IMS session response message sent by the called UE, and identifying a network access type of the called UE; Processing the IMS session response message according to the network access type of the called UE; The processed IMS session response message is forwarded to the calling network to establish an IMS session.

8. The method according to claim 7, characterized in that The identifying the network access type of the called UE includes: Parsing the PANI header field in the IMS session response message to obtain the network type identification information carried by the IMS session response message; The network access type of the called UE is determined according to the network type identification information carried in the IMS session response message.

9. The method according to claim 8, characterized in that The determining, according to the network type identification information carried in the IMS session response message, the network access type of the called UE includes: When the network type identification information carried in the PANI header field of the IMS session response message is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the called UE is a non-terrestrial network; When the network type identification information carried in the PANI header field of the IMS session response message is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the called UE is a terrestrial network.

10. The method according to claim 7, characterized in that The identifying the network access type of the called UE includes: Querying the policy control function network element to obtain the network type identification information of the called UE; The network access type of the called UE is determined according to the network type identification information of the called UE returned by the policy control function network element.

11. The method according to claim 10, characterized in that The determining the network access type of the called UE according to the network type identification information of the called UE returned by the policy control function network element includes: When the network type identification information of the called UE returned by the policy control function network element is one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", determining that the network access type of the called UE is a non-terrestrial network; When the network type identification information of the called UE returned by the policy control function network element is not one of "NR(LEO)", "NR(MEO)", "NR(GEO)", and "NR(OTHERSAT)", it is determined that the network access type of the called UE is a terrestrial network.

12. The method according to claim 7, characterized in that The processing of the IMS session response message according to the network access type of the called UE includes: If the network access type of the called UE is a non-terrestrial network, determining whether the IMS session response message carries a data channel capability tag and data channel response information; If the IMS session response message carries the data channel capability label and the data channel response information, the data channel capability label and the data channel response information carried by the IMS session response message are deleted to obtain the processed IMS session response message.

13. A message processing device, characterized in that: A proxy call session control function network element applied to a calling network, the device comprising: A first identification module, configured to receive an IMS session invitation message sent by a calling UE, and identify a network access type of the calling UE; A first processing module, configured to process the IMS session invite message according to the network access type of the calling UE; The first sending module is used to forward the processed IMS session invitation message to the called network to establish an IMS session.

14. A message processing device, characterized in that: A proxy call session control function network element applied to a called network, the device comprising: A second identification module is used to receive an IMS session response message sent by the called UE and identify the network access type of the called UE; A second processing module, configured to process the IMS session response message according to the network access type of the called UE; The second sending module is used to forward the processed IMS session response message to the calling network to establish an IMS session.

15. A proxy call session control function network element of a calling network, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

16. A proxy call session control function network element of a called network, comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 7 to 12 are implemented.

17. A message processing system, comprising the proxy call session control function network element of the calling network as claimed in claim 15, and the proxy call session control function network element of the called network as claimed in claim 16.

18. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are implemented.

19. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 12 are implemented.

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