WO2018233641A1 - Procédé, dispositif, système, et support de stockage lisible par ordinateur, employés pour analyser un message de signalisation triangulaire - Google Patents

Procédé, dispositif, système, et support de stockage lisible par ordinateur, employés pour analyser un message de signalisation triangulaire Download PDF

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Publication number
WO2018233641A1
WO2018233641A1 PCT/CN2018/092039 CN2018092039W WO2018233641A1 WO 2018233641 A1 WO2018233641 A1 WO 2018233641A1 CN 2018092039 W CN2018092039 W CN 2018092039W WO 2018233641 A1 WO2018233641 A1 WO 2018233641A1
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Prior art keywords
signaling
session record
sip
session
triangle
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PCT/CN2018/092039
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English (en)
Chinese (zh)
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高志森
燕晓
高锦花
阚长江
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中兴通讯股份有限公司
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Publication of WO2018233641A1 publication Critical patent/WO2018233641A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/40—Network security protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1069—Session establishment or de-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a triangular signaling analysis method, apparatus, system, and computer readable storage medium.
  • the Long Term Evolution (LTE) network has been deployed and experimented by operators in various countries, and people are living in the 4G era.
  • the multimedia service implementation scheme of LTE network evolution is the IP Multimedia Subsystem (IMS), which is the 4G terminal ( The UE, User Equipment) accesses the IMS through an Evolved Packet System (EPS) to implement media services such as voice and short message, that is, a VOLTE network.
  • IMS IP Multimedia Subsystem
  • EPS Evolved Packet System
  • the VOLTE network signaling detection system is used to maintain and monitor the quality of the VOLTE network. It is required to collect the SIP (Session Initiation Protocol) signaling, process and session, call analysis, and obtain the SIP signaling indicators and voice media of VOLTE. Indicators, through the comparison of indicators, to achieve network anomaly discovery, network optimization recommendations, and ultimately improve the overall quality of VOLTE networks.
  • SIP Session Initiation Protocol
  • a common and common signaling analysis system is a process for requesting and responding to signaling of interfaces between two network elements, and obtaining service indicators of the interface process; that is, all processes of a common protocol. Messages are exchanged between the same two network elements. When analyzing, two network element addresses are used as keywords to implement association analysis of all messages in a process.
  • a triangular signaling process occurs in the SIP signaling. That is, three network elements are involved in one process. Some messages in the process pass through some network elements and some messages do not pass. The method by which a keyword is associated with the overall process.
  • Embodiments of the present invention are directed to providing a triangular signaling analysis method, apparatus, system, and computer readable storage medium.
  • a method for analyzing a triangular signaling includes:
  • SIP signaling Determining whether the SIP signaling is SIP triangular signaling, and if so, creating a left session record, a right session record, and a bottom virtual session record under the call flow table;
  • the SIP triangle signaling is analyzed and processed by the complete session record and the half session record.
  • the receiving session creation protocol SIP signaling, and establishing a call flow table according to the SIP signaling includes:
  • the signaling of the access is a signaling fragment
  • the signaling fragment is grouped to form a complete SIP signaling
  • the analyzing and processing the SIP triangle signaling by using the complete session record and the half session record includes:
  • the SIP triangle signaling When the SIP triangle signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangle signaling belongs to the signaling corresponding to the initial request of the right session record; when the SIP triangle signaling When the signaling corresponding to the initial request recorded by the right session record is performed, the SIP triangle signaling is analyzed and processed by the first half session record;
  • the SIP triangular signaling is analyzed and processed by the first complete session record.
  • the analyzing and processing the SIP triangle signaling by using the complete session record and the half session record includes:
  • the SIP triangle signaling When the SIP triangle signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangle signaling belongs to the signaling corresponding to the initial request of the right session record; when the SIP triangle signaling When the signaling corresponding to the initial request recorded by the right session record is performed, the SIP triangle signaling is analyzed and processed by the second complete session record;
  • the SIP triangular signaling is analyzed and processed by the second complete session record.
  • the network element involved in the SIP triangle signaling includes: a calling service network element, a called service network element, and an inquiry network element, and the left side is created under the call flow table.
  • the session record, the right session record, and the bottom edge virtual session record including: creating a left session record based on SIP initial request signaling and corresponding response signaling between the calling service network element and the querying network element; Creating a right session record by using SIP initial request signaling and corresponding response signaling between the serving network element and the querying network element; based on the SIP initial request signaling between the calling service network element and the called service network element Subsequent request signaling and corresponding response signaling create a bottom virtual session record.
  • a triangular signaling analysis apparatus including:
  • the signaling receiving module is configured to receive SIP signaling, and establish a call flow table according to the SIP signaling;
  • the determining module is configured to determine whether the SIP signaling is SIP triangular signaling, and if yes, create a left session record, a right session record, and a bottom virtual session record in the call flow table;
  • a setting module configured to merge the bottom virtual session record and the left session record into a complete session record, or merge the bottom virtual session record and the right session record into a complete session record, and set the corresponding complete session record a complete triangle signaling session identifier; setting a half-side triangular signaling session identifier corresponding to the right session record or the left session record that does not form a complete session record;
  • the analysis processing module is configured to analyze and process the SIP triangle signaling by using the complete session record and the half session record.
  • the signaling receiving module includes:
  • a data access unit configured to collect signaling of access
  • the packet unit is configured to: if the signaling to be accessed is a signaling fragment, group the signaling fragment to form a complete SIP signaling;
  • a distribution unit configured to perform first decoding on the key segment of the SIP signaling, and distribute the decoded SIP signaling according to the session;
  • a codec unit configured to perform second decoding on the distributed SIP signaling to obtain field information of the SIP signaling
  • the call management unit is configured to perform session service logic analysis processing on the distributed SIP signaling according to the field information, and establish a call flow table.
  • the setting module comprises:
  • a first setting unit configured to merge the bottom virtual session record and the left session record into a first complete session record, set a first complete triangle signaling session identifier corresponding to the first complete session record; and set a right session record Setting, for the first half session record, a first half triangle signaling session identifier corresponding to the first half session record;
  • a second setting unit configured to merge the bottom virtual session record and the right session record into a second complete session record, set a second complete triangle signaling session identifier corresponding to the second complete session record; and set a left session record For the second half session record, set the second half triangle signaling session identifier corresponding to the second half session record.
  • the analysis processing module includes a determination unit, a first half triangle processing unit, and a first complete triangle processing unit;
  • the determining unit is configured to determine whether the SIP triangle signaling is signaling corresponding to an initial request that is attributed to the left session record; and when the SIP triangle signaling is a signaling corresponding to the initial request recorded by the left session record And sending the signaling corresponding to the initial request to the first complete triangular processing unit; when the SIP triangular signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangular signaling is a belonging The signaling corresponding to the initial request of the right session record; when the SIP triangle signaling is the signaling corresponding to the initial request recorded by the right session record, the signaling corresponding to the initial request is sent to the first half triangle processing unit; And configured to determine whether the SIP triangular signaling is signaling corresponding to a response corresponding to a subsequent request or a subsequent request after the initial request; if yes, sending the SIP triangular signaling to the first complete triangular processing unit;
  • the first half-edge triangular processing unit is configured to analyze the SIP triangular signaling by using the first half-side session record when the SIP triangle signaling is the signaling corresponding to the initial request and belongs to the right session record. deal with;
  • the first complete triangulation processing unit is configured to analyze the SIP triangulation signaling by using the first complete session record when the SIP triangulation signaling is signaling corresponding to an initial request and belongs to a left session record.
  • the processing is further configured to analyze and process the SIP triangular signaling by using the first complete session record when the SIP triangle signaling is a subsequent request and corresponding signaling after the initial request.
  • the analysis processing module includes a determination unit, a second half triangle processing unit, and a second complete triangle processing unit;
  • the determining unit is configured to determine whether the SIP triangle signaling is signaling corresponding to an initial request that is attributed to the left session record; and when the SIP triangle signaling is a signaling corresponding to the initial request recorded by the left session record And sending the signaling corresponding to the initial request to the second half triangle processing unit; when the SIP triangular signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangular signaling is a attribution The signaling corresponding to the initial request of the right session record; when the SIP triangle signaling is the signaling corresponding to the initial request recorded by the right session record, the signaling corresponding to the initial request is sent to the second complete triangular processing unit; And configured to determine whether the SIP triangular signaling is signaling corresponding to a response corresponding to a subsequent request or a subsequent request after the initial request; if yes, sending the SIP triangular signaling to the second complete triangular processing unit;
  • the second half triangle processing unit is configured to analyze the SIP triangle signaling by using the second half session record when the SIP triangle signaling is signaling corresponding to the initial request and belongs to the left session record. deal with;
  • the second complete triangle processing unit is configured to analyze the SIP triangular signaling by using the second complete session record when the SIP triangle signaling is signaling corresponding to the initial request and belongs to the right session record.
  • the processing is further configured to analyze and process the SIP triangular signaling by using the second complete session record when the SIP triangle signaling is a subsequent request and corresponding signaling after the initial request.
  • the network element involved in the SIP triangle signaling includes: a calling service network element, a called service network element, and a querying network element; and the determining module is configured to be based on the calling service network element Creating a left session record with SIP initial request signaling and corresponding response signaling between the querying network element; creating based on SIP initial request signaling and corresponding response signaling between the called service network element and the querying network element The right session record; creating a bottom virtual session record based on subsequent request signaling and corresponding response signaling after the SIP initial request signaling between the calling service network element and the called service network element.
  • a triangular signaling analysis system includes a memory, a processor, and at least one application stored in the memory and configured to be executed by the processor, The application is configured to perform the triangular signaling analysis method described above.
  • a computer readable storage medium having stored thereon a computer program that, when executed by a processor, implements the triangular signaling analysis method described above.
  • a method, device, system and computer readable storage medium for analyzing a triangular signaling comprising: receiving SIP signaling, establishing a call flow table according to the SIP signaling, and determining whether the SIP signaling is For SIP triangle signaling, if yes, create a left session record, a right session record, and a bottom virtual session record under the call flow table; merge the bottom virtual session record and the left session record into a complete session record, or Combining the bottom virtual session record and the right session record into a complete session record, setting a complete triangle signaling session identifier corresponding to the complete session record; setting a half session corresponding to the right session record or the left session record that does not form a complete session record a triangular signaling session identifier; analyzing and processing the SIP triangular signaling by using the complete session record and the half-side session record, and dividing the triangular signaling into a complete session record and a half-side session record, and the two cooperate with each
  • FIG. 1 is a flowchart of a method for analyzing a triangular signaling according to an embodiment of the present invention
  • step S10 of FIG. 1 is a flow chart of the method of step S10 of FIG. 1;
  • FIG. 5 is a schematic diagram of a method for analyzing a triangular signaling according to an embodiment of the present invention
  • FIG. 6 is a block diagram showing an exemplary structure of a triangular signaling analysis apparatus according to an embodiment of the present invention.
  • FIG. 7 is a block diagram showing an exemplary structure of the signaling receiving module of FIG. 6;
  • FIG. 8 is a schematic structural diagram of a triangular signaling analysis apparatus according to an embodiment of the present invention.
  • a method for analyzing a triangular signaling including:
  • S20 Determine whether the SIP signaling is SIP triangular signaling, and if yes, execute S30, and create a left session record, a right session record, and a bottom virtual session record in the call flow table;
  • step S60 if the SIP signaling is not SIP triangular signaling, the process proceeds to step S60, and the complete triangular signaling session identifier is not set.
  • the two by dividing the triangular signaling into a complete session record and a half session record, the two cooperate with each other, notify each other, and jointly analyze and process the triangular signaling, thereby improving the accuracy and rationality of the analysis process. Achieve full process management.
  • FIG. 2 it is a signaling flowchart of the triangular signaling in the SIP call flow in the prior art, and the network element involved in the SIP triangular signaling includes: the SCSCF as the calling service network element.
  • the called service network element SCSCF and the inquiry network element ICSCF As the called service network element SCSCF and the inquiry network element ICSCF; one call flow, through the calling SCSCF, ICSCF and called SCSCF, the call from the calling UE to the called SCSCF, initial request (invite) signaling, initial request (invite) signaling 180 response signaling, initial request (invite) signaling 200 response signaling has passed through the calling SCSCF, ICSCF and called SCSCF, but subsequent request (prack) signaling and subsequent request (prack) 200 response signaling does not pass through the ICSCF.
  • initial request (invite) signaling initial request (invite) signaling 180 response signaling
  • initial request (invite) signaling 200 response signaling has passed through the calling SCSCF, ICSCF and called SCSCF, but subsequent request (prack) signaling and subsequent request (prack) 200 response signaling does not pass through the ICSCF.
  • the protocol specifies that only the initial request (invite) signaling and the initial request (invite) response signaling will pass through the ICSCF, subsequent request signaling and response signaling. Does not pass the ICSCF. If the SIP signaling analysis is performed only on the interface between the calling SCSCF and the ICSCF, or only the SIP signaling analysis is performed on the interface between the ICSCF and the called SCSCF, only the invite signaling and the invite response signaling can be analyzed. The process is incomplete. If only SIP signaling analysis is performed on the interface between the calling SCSCF and the called SCSCF, only some messages in the process can be obtained, and the complete process cannot be analyzed; therefore, a method of overall combined analysis is needed.
  • the signaling analysis system may only collect signaling of half of the network elements.
  • the signaling analysis system can only collect. Incomplete signaling between the calling SCSCF and the ICSCF, incomplete signaling between the calling SCSCF and the called SCSCF, and lack of signaling between the ICSCF and the called SCSCF. This scenario cannot be analyzed and processed by the prior art. .
  • the signaling process when the triangle call signaling processing is performed, the signaling process performs association processing according to the call flow and the session record two-layer structure.
  • Table 1 is an example of a call flow table:
  • a Session[4] message is added to the call flow record, and the Session[4] represents a virtual session record.
  • Session record table Table content Session[1] Sip1 Dip1 Direct1
  • Triangleflag NULL Session[2]/Session[4]
  • Triangleflag fulltriangle
  • TriangleIndex 0x1
  • RelatedSession 3 Session[3] Sip3 Dip3 Direct3
  • Table 2 is an example of a session record table.
  • Add a virtual session record Session[4], and use the session record Session[2] to use an entity session record, and set the identifier Triangleflag fulltriangle, that is, the complete triangle signaling identifier.
  • a call signaling is received, and a call flow table record is created according to callid+from-tag+to-tag, and the multi-session session signaling of a call of the same callid+from-tag+to-tag is registered to
  • the flow chart of the multi-session session is based on sip+dip+direct (sip is source ip source IP, dip is destination) to create multiple session record tables, all hanging in a callid+from-tag+to-tag process Below the table.
  • the initial request invite request message from the calling SCSCF to the ICSCF creates a session record, using sip-main scscf+dip-icscf as the key, which is the left half session record; encounters the subsequent response letter from the calling SCSCF to the ICSCF When you use sip-scscf+dip-icscf, you can query this session record for request and response processing.
  • the initial invite signaling of the ICSCF to the called SCSCF is created to create a session record, using sip-icscf+dip-by scscf as the key, which is the right half session record; when encountering the subsequent response signaling from the ICSCF to the called SCSCF Use sip-icscf+dip-scsc to query this session record for request and response processing.
  • the sip-main scscf+dip- can not be queried by the scscf to the session record; but the half sip-main scscf+from-tag can be used to query
  • the left half of the session record is the sip-main scscf+dip-icscf record; using the half-dip-scsccftoto-tag can query the right half of the session record ie sip-icscf+dip-recorded by scscf. It can be presumed that the triangle signaling scenario is currently encountered, and a bottom-side session record is created.
  • the sip-main scscf+dip- is the keyword of scscf, the subsequent request and the corresponding response, and the sip-main scscf+dip- can be queried by scscf. Go to this session record for subsequent requests and corresponding response processing. If a call flow message is split into three session records on the left, right, and bottom sides, and each record can only obtain part of the signaling, the information is seriously lost. Therefore, the bottom session record is recorded as a virtual session record, and the left side (if the left side does not exist, then the right side) merges to share an entity session record, called a complete session record, which can obtain all signaling of the process, and process information. Complete and accurate.
  • the complete session record identifier is a complete triangle session record, and the right session record index is registered; the right session record identifier is a half session record, and its complete session record index is also registered; they have the same triangle call number, so that the upper layer system Two session information can be associated with each other during processing; they notify each other and collate statistics during data processing.
  • a full session record can receive a session release BYE message, notifying that the right session record is released (the right session record cannot receive subsequent requests and corresponding responses).
  • the full session record is counted as a triangle call, and the right session record is counted as a half-triangle call.
  • the reported call carries the same triangle call number, indicating that it is the same record of the same triangle call. Calculate as needed and count as 2 calls or one call.
  • the ACK message is received, the complete session record enters the stable call state, and the subsequent request and the corresponding response process are continued; the right session record can release the session record as needed, and report a half session record, because there will be no subsequent messages.
  • the session record on the right side it can also continue to hang, waiting for the full session record release, notify the right half of the session record release, can be processed according to business needs. At this point, the triangular signaling process is successfully processed, and data statistics and analysis are performed normally.
  • the left session record is created by the initial request signaling of the left session, and the session key of the left session record is set (the session keyword includes at least one of the following callid, ip1+from-tag) , ip2+to-tag); create a right session record by initial request signaling of the right session, set a session key of the right session record; create a bottom virtual session record from subsequent requests after the initial request, and set a bottom virtual session record Session keyword.
  • the step S10 includes:
  • the signaling of the access is a signaling fragment
  • the signaling fragment is grouped to form a complete SIP signaling.
  • S13 Perform first decoding on the key segment of the SIP signaling, and distribute the decoded SIP signaling according to the session;
  • the first decoding is fast decoding, and only the key segment is decoded.
  • the key segment may be a call identifier (Callid) or the like to facilitate signaling distribution;
  • the second decoding is detailed decoding to obtain field information.
  • the step S40 includes the following two situations:
  • the bottom virtual session record can be merged with the left session record into the first full session record, or merged with the right session record into the second full session record.
  • the priority can be pre-configured, for example, Priority is merged with the left session record; of course, the priority configuration is not limited to the above, and may be preferentially combined with the right session record, which is not limited in this embodiment.
  • the step S50 includes:
  • the SIP triangle signaling is the signaling corresponding to the response corresponding to the subsequent request or the subsequent request after the initial request, the SIP triangle signaling is analyzed and processed by the complete session record.
  • an initial request (invite) message and a response message corresponding to the initial request (invite) message are two segments, that is, the calling SCSCF and the called SCSCF.
  • the forwarding between the ICSCF has two initial request (invite) messages, and two response messages corresponding to the initial request (invite) message (ie, 180 response messages), then for the calling side, based on the initial request of the calling side (
  • the invite message creates a left session record, and for the called side, creates a right session record based on the initial request (invite) message of the called side; and after merging the complete session record, whether the complete session record is merged for the calling side or the called side, For the other side, it is still an incomplete left session record or a right session record; based on this, for the signaling corresponding to the initial request, the SIP triangle signaling needs to be analyzed and processed through the half session record and the complete session record.
  • the SIP triangular signaling is analyzed and processed by the complete session record for the type of signaling.
  • the analyzing, by the complete session record and the half session record, the SIP triangle signaling includes:
  • the SIP triangle signaling When the SIP triangle signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangle signaling belongs to the signaling corresponding to the initial request of the right session record; when the SIP triangle signaling When the signaling corresponding to the initial request recorded by the right session record is performed, the SIP triangle signaling is analyzed and processed by the first half session record;
  • the SIP triangular signaling is analyzed and processed by the first complete session record.
  • the analyzing, by the complete session record and the half session record, the SIP triangle signaling includes:
  • the SIP triangle signaling When the SIP triangle signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangle signaling belongs to the signaling corresponding to the initial request of the right session record; when the SIP triangle signaling When the signaling corresponding to the initial request recorded by the right session record is performed, the SIP triangle signaling is analyzed and processed by the second complete session record;
  • the SIP triangular signaling is analyzed and processed by the second complete session record.
  • the SIP triangle signaling includes: a calling service network element, a called service network element, and an inquiry network element; then, creating a left session record and a right side under the call flow table.
  • the session record and the bottom edge virtual session record include: creating a left session record based on SIP initial request signaling and corresponding response signaling between the calling service network element and the querying network element; the initial request signaling and the corresponding response Also referred to as initial request signaling and corresponding response signaling of the left session record; creating a right session record based on SIP initial request signaling and corresponding response signaling between the called service network element and the querying network element;
  • the request signaling and the corresponding response are also referred to as the initial request signaling and the corresponding response signaling of the right session record; a subsequent request letter after the SIP initial request signaling between the calling service network element and the called service network element Create and create a bottom virtual session record for the corresponding response signaling.
  • the calling UE initiates a SIP call, and sends an Invite signaling to the PCSCF network element, indicating that it is performed once. call.
  • the PCSCF forwards the call, sends (SM1) Invite signaling to the calling SCSCF network element; the calling SCSCF network element sends (SM2) Invite signaling to the ICSCF network element, and the ICSCF network element queries the called home SCSCF, and sends (SM3) Invite To the called SCSCF network element, the called SCSCF sends (SM4) Invite to the associated network element on the called side.
  • the called side returns a 180 response message (which can be recorded as (SM5) 180) to the called SCSCF, the called SCSCF sends (SM6) 180 response to the ICSCF, and the ICSCF forwards (SM7) 180 response to the calling SCSCF, and the calling SCSCF forwards ( SM8) 180 responds to the calling side network element.
  • the calling side network element returns a PURL request (the Provisional Response ACKnowledgement for the reliable temporary response), the request (SM9) Prack is forwarded to the calling SCSCF, and the calling SCSCF requests the subsequent request (SM10) Prack is forwarded directly to the called SCSCF and no longer passes through the ICSCF.
  • the called SCSCF forwards the request (SM11) to the called side network element.
  • the called side returns (SM12) the Prack-200 response, and the called SCSCF forwards (SM13) the Prack-200 directly to the calling SCSCF without passing through the ICSCF; the calling SCSCF forwards (SM14) the Prack-200 to the PCSCF.
  • the called side returns (SM15) Invite-200 response, the called SCSCF forwards (SM16) Invite-200 to the ISCSCF, the ICSCF forwards (SM17) Invite-200 to the calling SCSCF, passes through the ICSCF, and the calling SCSCF forwards (SM18) Invite- 200 to PCSCF. Subsequent requests and responses do not pass through the ICSCF after the session is established.
  • the PCSCF sends an acknowledgment (SM19) (Ack) message to the calling SCSCF; the calling SCSCF does not send (SM20) Ack message to the called SCSCF without forwarding through the ICSCF; the called SCSCF sends (SM21) Ack message to the called side network element.
  • the called side network element sends (SM22) Bye message to the called SCSCF; the called SCSCF sends a (SM23) Bye message to the calling SCSCF without forwarding through the ICSCF; the calling SCSCF sends the message to the PCSCF. (SM24) Bye message.
  • the PCSCF sends a (SM25) Bye-200 response message to the calling SCSCF; the calling SCSCF sends a (SM26) Bye-200 response message to the called SCSCF without forwarding through the ICSCF; the called SCSCF sends (SM27) Bye to the called side network element. -200 response message.
  • the PCSCF is a proxy network element.
  • the calling party is the IMS initial access point of the calling UE, and the called side can forward the message to the called UE through the called PCSCF;
  • the SCSCF is The service network element is used by both the calling and called parties to complete the call session control on the local side, and the service is triggered;
  • the ICSCF is the inquiry network element, and only the called party uses the initial entry point of the called network.
  • the triangular signaling analysis device is also applicable to other processes that the call process considers.
  • the subscription process also has a triangular signaling scenario in the registration process, and the like.
  • the embodiment of the present invention further provides a triangular signaling analysis device.
  • the triangular signaling analysis device includes:
  • the signaling receiving module 10 is configured to receive SIP signaling, and establish a call flow table according to the SIP signaling;
  • the determining module 20 is configured to determine whether the SIP signaling is SIP triangular signaling, and if yes, create a left session record, a right session record, and a bottom virtual session record in the call flow table; otherwise, the setting is not required to be complete. Triangular signaling session identifier;
  • the setting module 30 is configured to merge the bottom virtual session record and the left session record into a complete session record, or merge the bottom virtual session record and the right session record into a complete session record, and set the complete session record correspondingly Complete triangle signaling session identifier; set the half-side triangular signaling session identifier corresponding to the right session record or the left session record that does not form a complete session record;
  • the analysis processing module 40 is configured to perform analysis processing on the SIP triangle signaling by using the complete session record and the half session record.
  • the two by dividing the triangular signaling into a complete session record and a half session record, the two cooperate with each other, notify each other, and jointly analyze and process the triangular signaling, thereby improving the accuracy and rationality of the analysis process. Achieve full process management.
  • the signaling process when the triangle call signaling processing is performed, performs association processing according to the call flow and the session record two-layer structure.
  • Receiving a call signaling, creating a call flow table record according to callid+from-tag+to-tag, and multi-session session signaling of a call of the same callid+from-tag+to-tag is registered under the flow table;
  • the session call flow creates multiple session record tables according to sip+dip+direct (sip is source ip source IP, dip is destination), and is hung in a callid+from-tag+to-tag flow table.
  • the initial request invite request message from the calling SCSCF to the ICSCF creates a session record, using sip-main scscf+dip-icscf as the key, which is the left half session record; encounters the subsequent response letter from the calling SCSCF to the ICSCF When you use sip-scscf+dip-icscf, you can query this session record for request and response processing.
  • the initial invite signaling of the ICSCF to the called SCSCF is created to create a session record, using sip-icscf+dip-by scscf as the key, which is the right half session record; when encountering the subsequent response signaling from the ICSCF to the called SCSCF Use sip-icscf+dip-scsc to query this session record for request and response processing.
  • the sip-main scscf+dip- can not be queried by the scscf to the session record; but the half sip-main scscf+from-tag can be used to query
  • the left half of the session record is the sip-main scscf+dip-icscf record; using the half-dip-scsccftoto-tag can query the right half of the session record ie sip-icscf+dip-recorded by scscf. It can be presumed that the triangle signaling scenario is currently encountered, and a bottom-side session record is created.
  • the sip-main scscf+dip- is the keyword of scscf, the subsequent request and the corresponding response, and the sip-main scscf+dip- can be queried by scscf. Go to this session record for subsequent requests and corresponding response processing. If a call flow message is split into three session records on the left, right, and bottom sides, and each record can only obtain part of the signaling, the information is seriously lost. Therefore, the bottom session record is recorded as a virtual session record, and the left side (if the left side does not exist, then the right side) merges to share an entity session record, called a complete session record, which can obtain all signaling of the process, and process information. Complete and accurate.
  • the complete session record identifier is a complete triangle session record, and the right session record index is registered; the right session record identifier is a half session record, and its complete session record index is also registered; they have the same triangle call number, so that the upper layer system Two session information can be associated with each other during processing; they notify each other and collate statistics during data processing.
  • a full session record can receive a session release BYE message, notifying that the right session record is released (the right session record cannot receive subsequent requests and corresponding responses).
  • the full session record is counted as a triangle call, and the right session record is counted as a half-triangle call.
  • the reported call carries the same triangle call number, indicating that it is the same record of the same triangle call. Calculate as needed and count as 2 calls or one call.
  • the ACK message is received, the complete session record enters the stable call state, and the subsequent request and the corresponding response process are continued; the right session record can release the session record as needed, and report a half session record, because there will be no subsequent messages.
  • the session record on the right side it can also continue to hang, waiting for the full session record release, notify the right half of the session record release, can be processed according to business needs. At this point, the triangular signaling process is successfully processed, and data statistics and analysis are performed normally.
  • the signaling receiving module includes:
  • the data access unit 11 is configured to collect signaling of access
  • the packet unit 12 is configured to: if the signaling to be accessed is a signaling fragment, group the signaling fragments to form complete SIP signaling, and deliver the complete SIP signaling to the distribution unit 13 ;
  • the distribution unit 13 is configured to perform first decoding on the key segment of the SIP signaling, and distribute the decoded SIP signaling according to the session; wherein the distribution unit 13 performs the first decoding on the key segment of the SIP signaling After the callid information is obtained, the session is distributed according to the callid, and the same session signaling is distributed to the same codec unit 14;
  • the codec unit 14 is configured to perform second decoding on the distributed SIP signaling, and obtain field information of the SIP signaling, and transmit the field information to the service analyzing unit 15;
  • the call management unit 15 is configured to perform session service logic analysis processing on the distributed SIP signaling according to the field information to establish a call flow table.
  • the session service logic analysis process may specifically include call session context management processing.
  • the call management can be used according to the call management unit to realize the logical processing and data statistics of the business, and realize the correct, reasonable and flexible SIP call analysis and processing.
  • the setting module includes:
  • a first setting unit configured to merge the bottom virtual session record and the left session record into a first complete session record, set a first complete triangle signaling session identifier corresponding to the first complete session record; and set a right session record For the first half session record, set the first half triangle signaling session identifier corresponding to the first half session record.
  • the analysis processing module 40 includes a determination unit, a first half triangle processing unit, and a first complete triangle processing unit;
  • the determining unit is configured to determine whether the SIP triangle signaling is signaling corresponding to an initial request that is attributed to the left session record; and when the SIP triangle signaling is a signaling corresponding to the initial request recorded by the left session record And sending the signaling corresponding to the initial request to the first complete triangular processing unit; when the SIP triangular signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangular signaling is a belonging The signaling corresponding to the initial request of the right session record; when the SIP triangle signaling is the signaling corresponding to the initial request recorded by the right session record, the signaling corresponding to the initial request is sent to the first half triangle processing unit; And configured to determine whether the SIP triangular signaling is signaling corresponding to a response corresponding to a subsequent request or a subsequent request after the initial request; if yes, sending the SIP triangular signaling to the first complete triangular processing unit;
  • the first half-edge triangular processing unit is configured to analyze the SIP triangular signaling by using the first half-side session record when the SIP triangle signaling is the signaling corresponding to the initial request and belongs to the right session record. deal with;
  • the first complete triangulation processing unit is configured to analyze the SIP triangulation signaling by using the first complete session record when the SIP triangulation signaling is signaling corresponding to an initial request and belongs to a left session record.
  • the processing is further configured to analyze and process the SIP triangular signaling by using the first complete session record when the SIP triangle signaling is a subsequent request and corresponding signaling after the initial request.
  • the setting module includes: a second setting unit configured to merge the bottom virtual session record and the right session record into a second complete session record, and set a second corresponding to the second complete session record
  • the second complete triangle signaling session identifier is set; the left session record is set as the second half session record, and the second half triangle signaling session identifier corresponding to the second half session record is set.
  • the analysis processing module 40 includes a determination unit, a second half triangle processing unit, and a second complete triangle processing unit;
  • the determining unit is configured to determine whether the SIP triangle signaling is signaling corresponding to an initial request that is attributed to the left session record; and when the SIP triangle signaling is a signaling corresponding to the initial request recorded by the left session record And sending the signaling corresponding to the initial request to the second half triangle processing unit; when the SIP triangular signaling is not the signaling corresponding to the initial request recorded by the left session record, determining whether the SIP triangular signaling is a attribution The signaling corresponding to the initial request of the right session record; when the SIP triangle signaling is the signaling corresponding to the initial request recorded by the right session record, the signaling corresponding to the initial request is sent to the second complete triangular processing unit; And configured to determine whether the SIP triangular signaling is signaling corresponding to a response corresponding to a subsequent request or a subsequent request after the initial request; if yes, sending the SIP triangular signaling to the second complete triangular processing unit;
  • the second half triangle processing unit is configured to analyze the SIP triangle signaling by using the second half session record when the SIP triangle signaling is signaling corresponding to the initial request and belongs to the left session record. deal with;
  • the second complete triangle processing unit is configured to analyze the SIP triangular signaling by using the second complete session record when the SIP triangle signaling is signaling corresponding to the initial request and belongs to the right session record.
  • the processing is further configured to analyze and process the SIP triangular signaling by using the second complete session record when the SIP triangle signaling is a subsequent request and corresponding signaling after the initial request.
  • the network element involved in the SIP triangle signaling includes: a calling service network element, a called service network element, and an inquiry network element.
  • the determining module 20 is configured to be based on the calling service network element. Creating a left session record with SIP initial request signaling and corresponding response signaling between the querying network element; creating based on SIP initial request signaling and corresponding response signaling between the called service network element and the querying network element The right session record; creating a bottom virtual session record based on subsequent request signaling and corresponding response signaling after the SIP initial request signaling between the calling service network element and the called service network element.
  • the calling UE initiates a SIP call and sends Invite signaling to the PCSCF network element to indicate that a call is made.
  • the PCSCF forwards the call, sends (SM1) Invite signaling to the calling SCSCF network element; the calling SCSCF network element sends (SM2) Invite signaling to the ICSCF network element, and the ICSCF network element queries the called home SCSCF, and sends (SM3) Invite To the called SCSCF network element, the called SCSCF sends (SM4) Invite to the associated network element on the called side.
  • the called side returns a 180 response message (which can be recorded as (SM5) 180) to the called SCSCF, the called SCSCF sends (SM6) 180 response to the ICSCF, and the ICSCF forwards (SM7) 180 response to the calling SCSCF, and the calling SCSCF forwards ( SM8) 180 responds to the calling side network element.
  • the calling side network element returns a Prack request (the Provisional Response ACKnowledgement for confirming the reliable subsequent request message), the request (SM9) Prack is forwarded to the calling SCSCF, and the calling SCSCF forwards the subsequent request (SM10) Prack directly to The called SCSCF no longer passes the called ICSCF.
  • the called SCSCF forwards the request (SM11) to the called side network element.
  • the PCSCF is a proxy network element.
  • the calling party is the IMS initial access point of the calling UE, and the called side can forward the message to the called UE through the called PCSCF;
  • the SCSCF is The service network element is used by both the calling and called parties to complete the call session control on the local side, and the service is triggered;
  • the ICSCF is the inquiry network element, and only the called party uses the initial entry point of the called network.
  • FIG. 8 is an overall architecture diagram of a SIP triangulation signaling analysis apparatus of a VoLTE network
  • the flow relationship of each unit in the SIP triangulation signaling analysis apparatus can be better understood according to FIG. 8 , wherein the codec unit, the service analysis unit, and There can be more than one call management unit.
  • the triangular signaling analysis device is also applicable to other processes that the call process considers.
  • the subscription process also has a triangular signaling scenario in the registration process, and the like.
  • a triangular signaling analysis system comprising a memory, a processor and at least one application stored in the memory and configured to be executed by the processor, the application being configured It is used to perform the triangular signaling analysis method described in the embodiment.
  • the embodiment of the invention provides a computer readable storage medium, on which a computer program is stored, and when the program is executed by the processor, the method embodiment as described in any one of the foregoing embodiments of the triangular signaling analysis method is implemented.
  • a method, device, system and computer readable storage medium for analyzing a triangular signaling comprising: receiving a session creation protocol SIP signaling, establishing a call flow table according to the SIP signaling; determining the SIP Whether the signaling is SIP triangular signaling, and if so, creating a left session record, a right session record, and a bottom virtual session record under the call flow table; and the bottom virtual session record and the left session record or the right session record Merging into a complete session record, set to a full triangle signaling session identifier; setting the right session record or the left session record that does not form a complete session record to a half-edge triangular signaling session identifier; through the full session record and the half-session session Recording and analyzing the SIP triangle signaling, and dividing the triangular signaling into a complete session record and a half session record, the two cooperate with each other, notify each other, and jointly analyze and process the triangular signaling, thereby
  • the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and can also be implemented by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
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  • General Business, Economics & Management (AREA)
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Abstract

Des modes de réalisation de la présente invention concernent un procédé, un dispositif, un système, et un support de stockage lisible par ordinateur, employés pour analyser un message de signalisation triangulaire. Le procédé consiste à : recevoir un message de signalisation de protocole d'ouverture de session (SIP) et, d'après le message de signalisation SIP, établir une table de flux d'appel; déterminer si le message de signalisation SIP est un message de signalisation triangulaire SIP et, dans l'affirmative, établir un enregistrement de session gauche, un enregistrement de session droite, et un enregistrement de session virtuelle de fond en dessous de la table de flux d'appel; fusionner l'enregistrement de session virtuelle de fond et l'enregistrement de session gauche en un enregistrement de session complète, ou fusionner l'enregistrement de session virtuelle de fond et l'enregistrement de session droite en un enregistrement de session complète, et configurer un identificateur de session de signalisation triangulaire complet correspondant à l'enregistrement de session complète; configurer un identificateur de demi-session de signalisation triangulaire correspondant à l'enregistrement de session droite ou à l'enregistrement de session gauche non inclus dans l'enregistrement de session complète; et analyser le message de signalisation triangulaire SIP au moyen de l'enregistrement de session complète et de l'enregistrement de demi-session.
PCT/CN2018/092039 2017-06-20 2018-06-20 Procédé, dispositif, système, et support de stockage lisible par ordinateur, employés pour analyser un message de signalisation triangulaire WO2018233641A1 (fr)

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