CN109818816B - A VoLTE call delay analysis method and device - Google Patents

Abstract

Embodiments of the present invention provide a VoLTE call delay analysis method and device. The method includes acquiring an interface data set related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user ID and a time stamp; according to the user ID and the time stamp, each interface data is attributed to the user The group call bills are sorted according to the order of time stamps; the user group call bills are divided into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated during the VoLTE call process; according to the segmented bills The time delay of each segmented bill is obtained from the timestamp of the interface data in the Segment CDRs are used to calculate segment delays, so as to establish a VoLTE call multi-interface correlation analysis system and multi-interface correlation analysis tools to meet the maintenance requirements for quickly locating and solving problems.

Description

A VoLTE call delay analysis method and device

technical field

Embodiments of the present invention relate to the field of mobile communication technologies, and in particular, to a method and device for analyzing VoLTE call delay.

Background technique

With the rapid development of mobile communication technology and mobile terminal technology, LTE voice service, as the current mainstream language communication service, compared with traditional voice and OTT (over the top), can provide lower call delay, higher voice quality, and support High-definition voice, high-definition video and other communication services, and at the same time, it can realize the voice interworking with the existing network 2G/3G. Especially the call delay can directly reflect the user experience, so the end-to-end perception delay analysis is particularly important.

Most of the existing call delay analysis solutions count the call delay from a single interface (MW interface or GM interface), start timing from the first Invite message received on the interface, and receive a 180 response message, which is determined as connected. The delay can be estimated from the overall network connection delay of the existing network.

The traditional call delay analysis can only evaluate the overall quality from the data of a single interface. The analysis of the overall delay quality is not precise enough, and the location of the delay problem is not accurate enough.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a VoLTE call delay analysis method and device, which are used to solve the problem that in the prior art, the overall quality assessment can only be made from single interface data, the overall delay quality analysis is not precise enough, and the location of the delay problem is not enough. Inaccurate question.

In a first aspect, an embodiment of the present invention provides a VoLTE call delay analysis method, including:

Acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user ID and a time stamp;

According to the user identification and time stamp, attributing each interface data to the user group call bill, and sorting according to the sequence of the time stamps;

Divide the user group call bills into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated during the VoLTE call;

According to the time stamp of the interface data in the segmented bills, the time delay of each segmented bills is acquired.

In a second aspect, an embodiment of the present invention provides a VoLTE call delay analysis device, including:

an acquisition unit, configured to acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user identifier and a time stamp;

a screening unit, configured to attribute each interface data to the user group call bill according to the user identifier and the time stamp, and sort the data in the order of the time stamp;

an extraction unit, configured to divide the user group call bills into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated in the VoLTE call process;

A calculation unit, configured to acquire the delay of each segmented bill according to the timestamp of the interface data in the segmented bill.

In a third aspect, an embodiment of the present invention also provides an electronic device, including:

processors, memories, communication interfaces and buses; where,

The processor, the memory, and the communication interface communicate with each other through the bus;

The communication interface is used for information transmission between communication devices of the electronic device;

The memory stores program instructions executable by the processor, and the processor invokes the program instructions to execute the following methods:

Acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user ID and a time stamp;

According to the user identification and time stamp, attributing each interface data to the user group call bill, and sorting according to the sequence of the time stamps;

Divide the user group call bills into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated during the VoLTE call;

According to the time stamp of the interface data in the segmented bills, the time delay of each segmented bills is acquired.

In a fourth aspect, an embodiment of the present invention also provides a computer program, including program code, where the program code is configured to perform the following operations:

The processor is configured to invoke logic instructions in the memory to perform the following methods:

Acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user ID and a time stamp;

According to the user identification and time stamp, attributing each interface data to the user group call bill, and sorting according to the sequence of the time stamps;

Divide the user group call bills into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated during the VoLTE call;

According to the time stamp of the interface data in the segmented bills, the time delay of each segmented bills is acquired.

In a fifth aspect, an embodiment of the present invention further provides a storage medium for storing the aforementioned computer program.

In the VoLTE call delay analysis method and device provided by the embodiments of the present invention, the collected interface data is formed into a user group call bill corresponding to the VoLTE call process, and the key segmented bills are extracted to calculate the segmented bills. Based on this, a VoLTE call multi-interface correlation analysis system is established, and a VoLTE multi-interface correlation analysis tool is formed to meet the maintenance requirements of quickly locating and solving problems.

Description of drawings

1 is a flowchart of a VoLTE call delay analysis method according to an embodiment of the present invention;

2 is a schematic structural diagram of a VoLTE call delay analysis apparatus according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

FIG. 1 is a flowchart of a method for analyzing VoLTE call delay according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:

Step S01: Acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user identifier and a time stamp.

The VoLTE call service process is complex and tedious, and involves many network elements, which makes the signaling process very complicated. Therefore, it is particularly meaningful to analyze the end-to-end delay of VoLTE calls. The analysis of the end-to-end delay of VoLTE calls is part of the end-to-end quality analysis research. On this basis, a VoLTE call multi-interface correlation analysis system is established, and a VoLTE multi-interface correlation analysis tool is formed to meet the maintenance requirements of quickly locating and solving problems.

This embodiment of the present invention first acquires interface data related to the VoLTE call process within a preset time period, for example, an S1-MME interface used to connect a mobility management entity (Mobility Management Entity, MME) and the S1-MME of the base station eNodeB Data, use the Gx data of the connection policy and charging rules function (Policy and Charging Rules Function, PCRF) and the Gx of the system architecture evolution gateway (System Architecture Evolution GateWay, SAEGW) to connect the UE and the session border controller (Session Border Control) , SBC) Gm Gm interface data and so on. The interface data transmitted by each interface includes at least a subscriber identity and a time stamp, and the subscriber identity may be a Mobile Subscriber International ISDN number (MSISDN) used to identify a user's mobile phone number or an International Mobile Subscriber Identity. IMSI (International Mobile Subscriber Indentification number, IMSI), the two can be uniquely corresponding in a call process. The data collection method for each interface varies according to the corresponding interface. For example, the data collection method is performed on the transmission side by means of a hardware acquisition card or on the Operation and Maintenance Center (OMC) side by software. to collect information.

Step S02: According to the user identifier and the time stamp, assign each interface data to the user group call bill, and sort according to the order of the time stamps.

Extract the interface data with the same user ID, and then according to the time stamp, assign the interface data that meets the preset time threshold to the corresponding user group call bill, where the time threshold is set differently according to the VoLTE call process. The time relationship generated by the interface data is specifically set. Correlate all interface data belonging to the same user group call bill and add a unique group identifier, and simultaneously sort all interface data in the user group call bill according to the sequence of the timestamps. Thus, a user group call bill associated with end-to-end multi-interface data in a VoLTE single-user, single-service call process is obtained.

In this way, a large amount of collected interface information can be formed into multiple user group call bills, and the interface data of each user group call bill includes a unique group identifier.

Step S03: Divide the user group call bills into segmented bills with a preset number of segments according to the order in which the related interface data is generated during the VoLTE calling process.

According to the call service characteristics of LTE users, the call scenarios of VoLTE users can be divided into VoLTE calling VoLTE, VoLTE calling CS (2/3G users), VoLTE calling CS (Circuit Switch) (the domain is selected to CS), CS calling VoLTE, CS calling CS and other business scenarios. According to different service scenarios and the sequence of interface data generated during signaling transmission during call connection, multiple segmented CDRs can be extracted from user group call CDRs as required, for example: calling in the IMS domain Establish and called paging, etc. Specifically, according to the signaling transmission process corresponding to each segmented bill, find the first occurrence of the interface data corresponding to the segmented bill in the user group call bill and the last occurrence of the interface data corresponding to the The interface data corresponding to the segmented bill, the interface data between the two interface data found constitutes the segmented bill.

Step S04: Acquire the time delay of each segmented bill according to the timestamp of the interface data in the segmented bill.

According to the time stamps of the interface data in the segmented CDRs, the delay of each segmented CDR can be calculated separately, that is, the time stamp difference between the starting interface data and the ending interface data in the segmented CDRs. Values, such as: calling IMS domain call setup delay and called paging delay, etc. At this time, the segmented delay analysis table of the call bills of multiple user groups can be obtained, so that the connection delay can be refined in different stages, and the delay situation of each stage can be sorted out and evaluated.

Through further analysis, we can understand the reasons for the long connection delay in the process of VoLTE call service, for example: the delay is too long due to the loss of Invite signaling and multiple retransmissions, the LTE side bearer establishment and update connection delay is too long, IMS network element service trigger control leads to long connection delay, DRA message forwarding delay is too long, PCC domain policy control is too long to connect, intelligent network service trigger delay is too long, inter-office routing process leads to connection The delay is too long, the called paging time is too long, the called domain selection process delay is too long, the resource reservation time is too long, the VoLTE HD CRBT process triggering time is too long, and so on. Through the analysis of the above reasons, the specific situation of the delay consumption of each stage of the VoLTE call service is gradually refined, and the statistical values such as the maximum value, minimum value, average value, median value, and mode are defined, and the basic recommended delay value of each stage is established. VoLTE call end-to-end delay analysis standard.

In the embodiment of the present invention, the collected interface data is formed into a user group call bill corresponding to the VoLTE call process, and the key segmented bills are extracted to calculate the segment delay, and based on this, a VoLTE call multi-channel bill is established. The interface correlation analysis system forms a VoLTE multi-interface correlation analysis tool to meet the maintenance requirements of quickly locating and solving problems.

Based on the above embodiment, further, the interface data set includes at least a subset of IMS interface data related to the IMS domain, a subset of EPC interface data related to the EPC domain, and a subset of PCC interface data related to the PCC domain. Correspondingly, the According to the user ID and time stamp, each interface data is assigned to the user group call bill, and sorted according to the order of the time stamps; specifically:

According to the user ID and time stamp, each IMS interface data belongs to the IMS domain group call bill, each EPC interface data belongs to the EPC domain group call bill, and each PCC interface data belongs to the PCC domain group call bill;

According to the user ID and time stamp, associate the IMS domain group call bill, the EPC domain group call bill, and the PCC domain group call bill as the user group call bill, and add a group ID, where the user group The interface data in the call bill is sorted according to the sequence of the timestamps.

According to the VoLTE call process, the collected interface data can be divided into IMS interface data related to the IP Multimedia SubSystem (IMS) domain, for example: Gm interface data; and Evolved Packet Core (EPC) ) domain related EPC interface data, for example: S1-MME interface data; and PCC interface data related to Policy and Charging Control (PCC) domain. Then, according to the user ID and time stamp, each IMS interface data is assigned to the corresponding IMS domain group call bill, so that multiple IMS domain group call bills are formed in the IMS interface data subset, and each IMS domain group call bill is assigned to each IMS domain group. A unique first group identifier is added to the IMS interface data in the group call bill; each EPC interface data is assigned to the corresponding ECP domain group call bill, so that multiple EPC domain group calls are formed in the EPC interface data subset CDRs, and add a unique second group identifier to the EPC interface data in each EPC domain group call CDR; at the same time, each PCC interface data is also attributed to the corresponding PCC domain group call CDR, so that in the PCC A plurality of PCC domain group call bills are formed in the interface data subset, and a unique third group identifier is added to the PCC interface data in each PCC domain group call bill.

Then, according to the user ID and time stamp of each IMS interface data, EPC interface data and PCC interface data, associate the IMS domain group call bill, EPC domain group call bill and PCC domain group call bill as the VoLTE call bills in the whole process. The user group calls the CDR, and replaces the first group ID, the second group ID, and the third group ID with the new unique group ID, so that all interface data in the user group call CDR is added with the same ID. Group ID. Of course, the interface data in the call bill of the user group needs to be sorted in the order of time stamps. The first group identification, the second group identification, the third group identification and the group identification involved in the embodiment are all unique identifications that are different from each other, and the specific design is not specifically limited.

In the embodiment of the present invention, the collected interface data is divided into the IMS domain, the EPC domain and the PCC domain according to the characteristics of the VoLTE call process to be correlated respectively, and then correlated with each other to form the call bill of the user group corresponding to the VoLTE call process. A VoLTE call multi-interface correlation analysis system is basically established, and a VoLTE multi-interface correlation analysis tool is formed to meet the maintenance requirements of quickly locating and solving problems.

Based on the above embodiment, further, the IMS interface data subset includes at least Gm interface data, Mw interface data, ISC interface data, Mg interface data, Mj interface data, Cx interface data and Sh interface data, wherein the Gm interface data data, Mw interface data, ISC interface data and Mj interface data at least include the ICID field, the Mw interface data and the Gm interface data at least include the Call-ID field, the Mw interface data, the Cx interface data and the Sh interface data at least include all The user identifier, correspondingly, according to the user identifier and time stamp, attributing each IMS interface data to the IMS domain group call bill, specifically:

associating the Gm interface data, Mw interface data, ISC interface data and Mj interface data with the same ICID field and meeting the preset first time threshold range, and adding a first group of identifiers respectively;

Associating the Gm interface data with the same Call-ID field and satisfying the preset second time threshold range with the Mw interface data, and adding the first group identifier of the associated Mw interface data to the Gm interface data;

The Cx interface data and the Sh interface data that are the same as the user identifiers and satisfy the preset third time threshold range are respectively associated with the Mw interface data, and the first group identifiers of the associated Mw interface data are added respectively;

All IMS interface data with the same first group of identifiers are formed into an IMS domain group call bill.

The interfaces related to the IMS domain include at least Gm, Mw, ISC, Mg, Mj, Cx, and Sh, etc. The data of the above interfaces is collected to obtain a subset of IMS interface data, including Gm interface data, Mw interface data, and ISC interface data. , Mg interface data, Mj interface data, Cx interface data and Sh interface data.

The fields in the various interface data collected in the actual application process may be incomplete, so in the process of associating each interface data, not only the user ID but also some other fields will be used. Correlations are made to increase the reliability and confidence of the correlation. In the following embodiments, the fields used are only examples of them, and different fields can also be used according to different needs in the actual operation process.

Because the Gm interface data, the Mw interface data, the ISC interface data and the Mj interface data at least include an Internet Credit Identity (ICID) field. Therefore, the Gm interface data, Mw interface data, ISC interface data, and Mj interface data whose ICID fields are the same and satisfy the first time threshold range, for example, 12 seconds, are associated, and the first set of identifiers are added to these interface data. The first time threshold range and the multiple time threshold ranges involved in the association described in the following embodiments are also preset empirical values, which can be performed according to the actual situation and needs of the interface data collected. The setting is not specifically limited here.

The Gm interface data and the Mw interface data include at least a Call-ID field. Therefore, the Gm interface data with the same Call-ID field and satisfying the second time threshold range, such as 2 seconds, is associated with the Mw interface data. And since the Mw interface data has already added the first group of identifiers through the above-mentioned association process, the first group of identifiers can also be added to the associated Gm interface data.

It should be noted that the above-mentioned interface data can be divided into calling-side interface data and called-side interface data according to the location of the corresponding interface. For example, the Gm interface data is divided into calling-side Gm interface data and called-side interface data. Gm interface data on the calling side and Mw interface data on the calling side are also divided into Mw interface data on the calling side and Mw interface data on the called side, so when the association is performed, the Gm interface data on the calling side and the Mw interface data on the calling side can also be respectively Perform association, and the called side Gm interface data is associated with the called side Mw data. The interface data involved in the following embodiments can also be associated with each other in the same manner, but for the convenience of description, only one side is used as an example for illustration in the following embodiments.

Before the association operation is performed on the Cx interface data and the Sh interface data, the XDR data of the LIR/LIA type message should be removed from all the Cx interface data, and the XDR data of the UDR/UDA type message should be removed from all the Sh interface data. Then, associate the Cx interface data and Sh interface data with the same user ID and meet the third time threshold range, for example, 2 seconds, with the Mw interface data, and then add the first set of IDs of the Mw interface data to the associated Cx interface data and Sh interface data.

At this point, each interface data in the IMS interface data subset has been added with a corresponding first group of identifiers. Multiple IMS domain group call bills can be formed by combining the Gm interface data, Mw interface data, ISC interface data, Mg interface data, Mj interface data, Cx interface data, and Sh interface data with the same identifier in the first group.

The embodiment of the present invention correlates the collected data of multiple IMS interfaces, and then further composes the call bill of the user group corresponding to the VoLTE call process, and establishes a VoLTE call multi-interface correlation analysis system based on this, forming a VoLTE multi-interface Correlation analysis tools meet the maintenance requirements of quickly locating and solving problems.

Based on the above embodiment, further, the EPC interface data subset includes at least S1-MME interface data, S11 interface data and S6a interface data, wherein the S1-MME interface data and S6a interface data at least include a GUTI field, and the The S11 interface data and the S1-MME interface data include at least the user identifier; correspondingly, each EPC interface data is assigned to the EPC domain group call bill, specifically:

Associating the S1-MME interface data and the S6a interface data with the same GUTI field and satisfying the preset fourth time threshold range, and adding a second group of identifiers respectively;

Associating the S11 interface data with the same user identifier and satisfying the fifth time threshold range with the S1-MME interface data, and adding the second group identifier of the associated S1-MME to the S11 interface data

All EPC interface data with the same identifier of the second group are formed into an EPC domain group call bill.

The interfaces related to the EPC domain include at least S1-MME, S11 and S6a, etc. Data collection on these interfaces can obtain a subset of EPC interface data, including at least S1-MME interface data, S11 interface data and S6a interface data.

The S1-MME interface data and the S6a interface data at least include a Globally Unique Temporary UE Identity (GUTI) field, and the GUTI is composed of mcc+mnc+mme_code+m-tmsi. Associate the S1-MME interface data and the S6a interface data with the same GUTI field and meet the fourth time threshold range, such as 4 seconds, and respectively add a second set of identifiers to the associated interface data.

The S1-MME interface data and the S11 interface data both include at least a user identifier, so the S11 interface data that is the same as the user identifier and satisfies the fifth time threshold range, such as 2 seconds, is associated with the S1-MME interface data, and The second set of identifiers that have been added to the S1-MME interface data is added to the associated S11 interface data.

Then, in the EPC interface data subset, each interface data with the same identifier of the second group can be formed into multiple EPC domain group call bills.

The embodiment of the present invention correlates the collected data of multiple EPC interfaces, and then further composes the user group call bills corresponding to the VoLTE call process, and establishes a VoLTE call multi-interface correlation analysis system based on this, forming VoLTE multi-interfaces Correlation analysis tools meet the maintenance requirements of quickly locating and solving problems.

Based on the above embodiment, further, the PCC interface data subset includes at least Rx interface data and Gx interface data, wherein the Rx interface data and Gx interface data at least include the session_id field and the user identifier; The data of each PCC interface belongs to the PCC domain group call bill, which is as follows:

Associating the Rx interface data and Gx interface data with the same session_id field and meeting the preset sixth time threshold range as the Rx data group with the first sub-identity and the Gx data group with the second sub-identity added;

If there are Rx interface data and Gx interface data in the Rx data group and the Gx data group that have the same user ID and meet the preset seventh time threshold range, then associate the Rx data group and the Gx data group, and use the first Three sets of identifications replace the first sub-identity and the second sub-identity;

The third group of PCC interface data with the same identifier is formed into a PCC domain group call bill.

The interface related to the PCC domain includes at least Rx interface data and Gx interface data, wherein the Rx interface data and Gx interface data at least include a session_id field and a user ID.

First, combine the Rx interface data and Gx interface data respectively according to the session_id field, that is, combine the Rx interface data with the same session_id field and meet the sixth time threshold, such as 6 seconds, into an Rx data group, and give the Rx interface data in the group. A first sub-identity is added; at the same time, Gx interface data with the same session_id field and satisfying the sixth time threshold is combined into a Gx data group, and a second sub-identity is added to the Gx interface data in the group.

Then compare the Rx interface data in the Rx data group with the Gx interface data in the Gx data group respectively, if there are Rx interface data and Gx interface data with the same user ID and satisfying the preset seventh time threshold range, such as 2 seconds, data, then associate the Rx data group with the Gx data group to form the PCC domain group call bill, and replace the first sub-identity or the second sub-identity of the interface data in the PCC domain group call bill with the third group identification.

If both the Rx interface data and the Gx interface data further include an ICID field, when associating the Rx data group with the Gx data group, the ICID fields of the Rx interface data and the Gx interface data can also be compared. If there are Rx interface data and Gx interface data that have the same ICID field and meet the seventh time threshold range, associate the corresponding Rx data group and Gx data group as a PCC domain group call bill.

The embodiment of the present invention correlates the collected data of multiple PCC interfaces, and then further composes the user group call bills corresponding to the VoLTE call process, and establishes a VoLTE call multi-interface correlation analysis system based on this, forming VoLTE multi-interfaces Correlation analysis tools meet the maintenance requirements of quickly locating and solving problems.

Based on the above embodiment, further, the IMS domain group call bill, the EPC domain group call bill, and the PCC domain group call bill are associated with the user group call bill according to the user identifier and the time stamp, And add a group identifier, wherein the interface data in the user group call bill is sorted according to the sequence of the timestamps, specifically:

If the Mw interface data and the Rx interface data with the same user ID and satisfying the preset eighth time threshold range exist in the IMS domain group call bill, the PCC domain group call bill and the EPC domain group call bill Or the Gx interface data and the S1-MME interface data, then associate the IMS domain group call bill, the PCC domain group call bill, and the EPC domain group call bill to form the user group call bill, and use all The group identifier replaces the first group identifier, the second group identifier and the third group identifier, wherein the interface data in the user group call bill is sorted according to the sequence of the time stamps.

Through the above embodiments, multiple IMS domain group call bills, EPC domain group call bills, and PCC domain group call bills have been formed in the interface data set. Then, it is necessary to associate the IMS domain group call bills, the EPC domain group call bills, and the PCC domain group call bills that belong to the same user group. In the process of correlation, the correlation may be performed after the pairwise comparison, or the comparison may be performed at the same time, which is not specifically limited here, and only one of the methods is used for illustration in this embodiment.

Compare the Mw interface data in the IMS domain group call bill with the user ID and timestamp in the Rx interface data in the PCC domain group call bill. If there is Mw interface data with the same user ID and meeting the eighth time threshold range and Rx interface data, then associate the IMS domain group call bill with the PCC domain group call bill, and generate a new group ID to replace the associated IMS domain group call bill and PCC domain group call bill The first set of identifiers and the third set of identifiers of the interface data.

Then compare the Mw interface data in the IMS domain group call bill with the S1-MME interface data in the EPC domain group call bill. -MME interface data, then associate the EPC domain group call bill with the IMS domain group call bill, and at the same time replace the second group ID with the group ID. Combining the above associated PCC domain group call bills, a user group call bill is formed, wherein all interface data in the user group call bills are sorted in the order of time stamps.

In the above process of associating the IMS domain group call bill, the PCC domain group call bill and the EPC domain group call bill, different interface data can also be used, for example, in the IMS domain group call bill and the PCC domain group call bill During the association process of the CDR, the Gx interface data of the PCC domain group call CDR is used to compare with the Mw interface data in the IMS domain group call CDR. Which interface data to use can be determined according to the actual data collection situation, which is not specifically limited here.

So far, in the interface data set, a plurality of user group call bills identified by group identification can be formed.

In the embodiment of the present invention, the associated IMS domain group call record, EPC domain group call record, and PCC domain group call record are associated to form a user group call record corresponding to the VoLTE call process, and a VoLTE call is established on this basis. The multi-interface correlation analysis system forms a VoLTE multi-interface correlation analysis tool to meet the maintenance requirements of quickly locating and solving problems.

Based on the above embodiment, further, the segmented CDR specifically includes the establishment of the calling default bearer, the establishment of the calling dedicated bearer, the establishment of the calling IMS domain call, the inter-office addressing of the called ISCSF, the addressing of the called SCSCF, and the addressing of the called SCSCF. Call pre-selection, called IMS domain call establishment, called paging, called default bearer establishment, called dedicated bearer establishment, resource reservation, ringing trigger; ,Specifically:

Obtain the calling default bearer establishment delay, the calling dedicated bearer establishment delay, the calling IMS domain call establishment delay, the called ISCSF interoffice addressing delay, the called SCSCF addressing delay, the called preselection delay, Called IMS domain call establishment delay, called paging delay, called default bearer establishment delay, called dedicated bearer establishment delay, resource reservation delay, ringing trigger delay.

According to the definition of the end-to-end connection delay for VoLTE calls, that is, the time difference between when the calling terminal initiates a SIP (Session Initiation Protocol) INVITE message and receives the SIP 180Ring message sent by the network side. When the calling terminal is in an idle state, since there is a service to be transmitted, the terminal will first initiate a random access message, a Service Request process, return to the RRC connection state, and then send a SIP INVITE message to establish a session connection. At this time, the VoLTE call connection delay calculation is the time difference between when the calling terminal initiates the Service Request message and receives the SIP 180Ring message sent by the network side.

The above-obtained VoLTE user group call bills for calling VoLTE can be divided into multiple segmented bills. In this embodiment, only the following 12 segmented bills are used as examples for illustration, which are the default bearer establishment of the calling party. , Calling Dedicated Bearer Establishment, Calling IMS Domain Call Establishment, Called ISCSF Interoffice Addressing, Called SCSCF Addressing, Called IMS Domain Call Establishment, Called Domain Selection, Called Paging, Called Default Bearer Establishment , the called dedicated bearer is established, resources are reserved, and ringing is triggered.

Then, according to the time stamp of the interface data in the segmented CDRs, the above 12 segmented CDRs are calculated to obtain 12 segment delays: the calling party's default bearer setup delay, the calling party's dedicated bearer setup delay, and the calling party's dedicated bearer setup delay. IMS domain call setup delay, called ISCSF interoffice addressing delay, called SCSCF addressing delay, called preselection delay, called IMS domain call setup delay, called paging delay, called default Bearer establishment delay, called dedicated bearer establishment delay, resource reservation delay, and ringing trigger delay.

Each of these stages is as follows:

(1) The calling default bearer is established

It mainly refers to the process of establishing or restoring the default bearer of QCI=5 when the calling user initiates a VoLTE call in the LTE idle state. The calling user sends an Invite message to indicate that the calling party's default bearer is established. This segmented delay can be evaluated as a short delay in starting the preparation process in the LTE network after the user initiates a call.

(2) Calling dedicated bearer establishment

Mainly refers to that the calling SBC starts the resource reservation Precondition after receiving a request for establishing a VoLTE session from the calling user, and initiates the process of establishing a dedicated bearer with QCI=1/2. This segment delay can evaluate the IP-CAN (IP-Connectivity Access Network) session modification delay caused by the establishment of the PCC domain application function (Application Function, AF) session on the calling side, and the response process of the calling side mobile terminal to the establishment of the dedicated bearer time delay.

(3) The calling IMS domain call is established

Mainly refers to the process delay that the Proxy Call Session Control Function (PCSCF) on the calling side receives the Invite message from the Gm interface, and the SIP signaling message starts to trigger the service in the IMS domain core network, until the last application The server (Application Server, AS) returns an Invite message. This segmented delay evaluates the total delay of the initial processing of SIP signaling in the calling IMS domain as a whole. According to different user subscription services, the IMS domain establishment delay will also vary greatly. Processing performance of SIP signaling messages.

The difference between the minimum delay and the maximum delay for the establishment of the calling IMS domain is that the NEs process and forward the SIP signaling during the interaction of several interfaces in the IMS domain. It can be about 10ms, and in extreme cases it can reach tens of milliseconds. Due to the cumbersome IMS domain signaling process, the accumulated delay becomes very large.

(4) Inter-office addressing of the called ISCSF

Mainly refers to the signaling routing process delay between the calling service session control function (Serving Call Session Control Function, SCSCF) to the called negotiation session control function (Interrogating Call Session Control Function, ICSCF). The segment delay can be used to evaluate the process delay of querying DNS routing ICSCF, and the transmission delay of local inter-office or long-distance signaling network.

(5) The called SCSCF addressing

Mainly refers to the signaling routing process delay between the called ICSCF and the called SCSCF. Query the HSS to select the SCSCF process delay and the calling and called SCSCF inter-office signaling processing delay.

(6) The called IMS domain call is established

The call establishment delay in the calling IMS domain is the opposite process. It refers to the delay that the Invite initial session message reaches the called SCSCF and performs subscription service trigger control in the called IMS core network until the call is transferred out of the Invite through the called Gm interface. .

(7) Called domain selection delay

The MMTel AS/SCC AS sends a UDR message to the called converged HLR/HSS, requesting to obtain the T-ADS information of the called user. The called converged HLR/HSS returns the T-ADS information through the UDA message according to the IDA message returned by the called MME. To the called MMTel AS/SCC AS. In this process, the called user domain selection process delay is established, which is used for statistical analysis of the called domain selection delay. The delay at this stage is included in the called IMS domain establishment delay.

(8) Called paging delay

The called-side EPC sends an Invite message to the called user in the idle state. Since the called user is in the idle state, the called-side EPC triggers a paging process to page the called user in the idle state. This segment delay can evaluate the LTE paging delay of VoLTE calls and evaluate whether the paging mechanism of the LTE system is reasonable.

(9) The called default bearer is established

It mainly refers to the delay of the process of triggering RRC connection, security mode, establishing or restoring the default bearer of QCI=5 after the called user receives the paging message. The segmented delay can evaluate the short time extension of the LTE network where the called user is located for the VoLTE call initiation preparation process.

(10) The called dedicated bearer is established

After receiving the 183 session processing message of the called user, the called SBC starts Precondition and initiates the process of establishing dedicated bearers with QCI=1 and 2. This segment delay can evaluate the IP-CAN session modification delay caused by the establishment of the AF session in the PCC domain on the called side, and the response process delay of the called mobile terminal to the establishment of the dedicated bearer.

(11) Resource reservation

Refers to the delay process from the 183 message returned by the called side IMS network to the calling side carrying the SDP media resource negotiation content until the calling side receives the media resource negotiation process complete message. This segment delay can evaluate the delay of the media resource reservation process on the calling side and the called side, the processing and forwarding delay of each network element in VoLTE on the media resource negotiation process, the terminal's response delay on the media resource negotiation process, and the temporary response delay. Reliability confirmation process delay

(12) Ringing trigger

Refers to the process delay that after the media negotiation resource reservation is completed, the called mobile phone triggers a 180 ringing message until the calling mobile phone receives the ringing message. This segment delay mainly considers the short time extension of the CRBT triggering process. If there is no CRBT, the delay in this segment is usually very short.

The embodiment of the present invention establishes a VoLTE call multi-interface correlation analysis system by dividing the formed VoLTE call process corresponding user group call bills into multiple segmented bills and calculating the delay of each segmented bill. , forming a VoLTE multi-interface correlation analysis tool to meet the maintenance requirements of quickly locating and solving problems.

FIG. 2 is a schematic structural diagram of a VoLTE call delay analysis apparatus according to an embodiment of the present invention. As shown in FIG. 2 , the apparatus includes: an acquisition unit 10, a screening unit 11, an extraction unit 12, and a calculation unit 13, wherein,

The acquiring unit 10 is configured to acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user ID and a time stamp; the screening unit 11 is configured to For the user ID and time stamp, each interface data belongs to the user group call bill, and is sorted according to the order of the time stamps; the extraction unit 12 is used for according to the relevant interface data in the VoLTE call process The generated order divides the user group call bills into segmented bills with a preset number of segments; the computing unit 13 is configured to obtain each segmented bill according to the timestamp of the interface data in the segmented bills. The delay of the segment bill. specifically:

The obtaining unit 10 first obtains interface data related to the VoLTE call process, such as S1-MME interface data, Gx interface data and Gm interface data, within a preset time period. The interface data transmitted by each interface includes at least a user identifier and a time stamp, and the user identifier may be MSISDN or IMSI used to identify the user's mobile phone number, and the two may uniquely correspond during a call. The acquisition unit 10 sends all the received interface data to the screening unit 11 .

The screening unit 11 extracts the interface data with the same user ID, and then according to the time stamp, assigns the interface data that meets the preset time threshold to the user group call bill, wherein the setting of the time threshold will vary according to the VoLTE call process. The time relationship generated by the interface data is specifically set. Correlate all interface data belonging to the user group call bill and add a unique group identifier, and at the same time sort all the interface data in the user group call bill according to the sequence of the timestamps. Thus, a user group call bill associated with end-to-end multi-interface data in a VoLTE single-user, single-service call process is obtained.

In this way, the screening unit 11 can form a plurality of user group call bills from a large amount of collected interface information, and the interface data of each user group call bill includes a unique group identifier. The screening unit 11 sends the obtained call bills of all user groups to the extraction unit 12 .

The extracting unit 12 can extract a plurality of user group call bills as needed according to the characteristics of the LTE user call service, according to different service scenarios, and the sequence of interface data generated in the process of signaling transmission during the call connection process. The segmented bills are then sent to the computing unit 13 for all user group call bills and segmented bills.

The calculation unit 13 can separately calculate the delay of each segmented bill according to the time stamp of the interface data in the segmented bill, that is, the time from the starting interface data to the ending interface data in the segmented bill. Stamp difference. At this time, the segmented delay analysis table of the call bills of multiple user groups can be obtained, so that the connection delay can be refined in different stages, and the delay situation of each stage can be sorted out and evaluated.

The apparatus provided in the embodiment of the present invention is used to execute the foregoing method, and its function refers to the foregoing method embodiment for details, and the specific method flow is not repeated here.

In the embodiment of the present invention, the collected interface data is formed into a user group call bill corresponding to the VoLTE call process, and the key segmented bills are extracted to calculate the segment delay, and based on this, a VoLTE call multi-channel bill is established. The interface correlation analysis system forms a VoLTE multi-interface correlation analysis tool to meet the maintenance requirements of quickly locating and solving problems.

FIG. 3 is a schematic structural diagram of an electronic device according to an embodiment of the present invention. As shown in FIG. 3 , the electronic device includes: a processor (processor) 601, a memory (memory) 602 and a bus 603;

Wherein, the processor 601 and the memory 602 communicate with each other through the bus 603;

The processor 601 is configured to call the program instructions in the memory 602 to execute the methods provided by the above method embodiments, for example, including: acquiring the interface data related to the VoLTE call process within a preset time period. An interface data set, wherein each interface data includes at least a user ID and a time stamp; according to the user ID and time stamp, each interface data is assigned to a user group call bill, and sorted according to the order of the time stamps ; According to the order in which the relevant interface data is generated in the VoLTE calling process, the user group call bill is divided into segmented bills with a preset number of segments; according to the time stamp of the interface data in the segmented bills, Obtain the delay of each segmented CDR.

Further, an embodiment of the present invention discloses a computer program product, the computer program product includes a computer program stored on a non-transitory computer-readable storage medium, the computer program includes program instructions, and when the program instructions are executed by a computer During execution, the computer can execute the methods provided by the above method embodiments, for example, including: acquiring an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user identifier. and time stamp; according to the user ID and time stamp, each interface data is attributed to the user group call bill, and sorted according to the order of the time stamp; according to the relevant interface data generated during the VoLTE call The user group call bills are sequentially divided into segmented bills with a preset number of segments; and the time delay of each segmented bill is acquired according to the timestamp of the interface data in the segmented bills.

Further, an embodiment of the present invention provides a non-transitory computer-readable storage medium, where the non-transitory computer-readable storage medium stores computer instructions, and the computer instructions cause the computer to execute the methods provided by the foregoing method embodiments. The method, for example, includes: acquiring an interface data set consisting of interface data related to a VoLTE call process within a preset time period, wherein each interface data at least includes a user identifier and a time stamp; Each interface data belongs to the user group call bill, and is sorted according to the sequence of the timestamps; the user group call bill is divided into preset points according to the order in which the relevant interface data is generated during the VoLTE call process. The segmented bills with the number of segments; according to the timestamp of the interface data in the segmented bills, the time delay of each segmented bills is obtained.

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by program instructions related to hardware, the aforementioned program can be stored in a computer-readable storage medium, and when the program is executed, execute It includes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

The above-described electronic equipment and other embodiments are only illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, It can be located in one place, or it can be distributed over multiple network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment. Those of ordinary skill in the art can understand and implement it without creative effort.

From the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus a necessary general hardware platform, and certainly can also be implemented by hardware. Based on this understanding, the above-mentioned technical solutions can be embodied in the form of software products in essence or the parts that make contributions to the prior art, and the computer software products can be stored in computer-readable storage media, such as ROM/RAM, magnetic A disc, an optical disc, etc., includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the methods described in various embodiments or some parts of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand: it can still be Modifications are made to the technical solutions described in the foregoing embodiments, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. a VoLTE call time delay analysis method, is characterized in that, comprises: Acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user ID and a time stamp; wherein the interface data set at least includes IMS interfaces related to the IMS domain Data subset, EPC interface data subset related to EPC domain and PCC interface data subset related to PCC domain; According to the user identification and time stamp, attributing each interface data to the user group call bill, and sorting according to the sequence of the time stamps; Divide the user group call bills into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated during the VoLTE call; Obtain the delay of each segmented bill according to the timestamp of the interface data in the segmented bill; Wherein, according to the user ID and time stamp, each interface data is attributed to the user group call bill, and sorted according to the order of the time stamps; specifically: According to the user ID and time stamp, each IMS interface data belongs to the IMS domain group call bill, each EPC interface data belongs to the EPC domain group call bill, and each PCC interface data belongs to the PCC domain group call bill; According to the user ID and time stamp, associate the IMS domain group call bill, the EPC domain group call bill, and the PCC domain group call bill as the user group call bill, and add a group ID, where the user group The interface data in the call bill is sorted according to the sequence of the timestamps. 2. The method according to claim 1, wherein the IMS interface data subset comprises at least Gm interface data, Mw interface data, ISC interface data, Mg interface data, Mj interface data, Cx interface data and Sh interface data, wherein the Gm interface data, the Mw interface data, the ISC interface data and the Mj interface data at least include the ICID field, the Mw interface data and the Gm interface data at least include the Call-ID field, the Mw interface data, the Cx interface data and Sh interface data at least include the user identifier, and correspondingly, according to the user identifier and time stamp, the attribution of each IMS interface data to the IMS domain group call bill is specifically: associating the Gm interface data, Mw interface data, ISC interface data and Mj interface data with the same ICID field and meeting the preset first time threshold range, and adding a first group of identifiers respectively; Associating the Gm interface data with the same Call-ID field and satisfying the preset second time threshold range with the Mw interface data, and adding the first group identifier of the associated Mw interface data to the Gm interface data; The Cx interface data and the Sh interface data that are the same as the user identifiers and satisfy the preset third time threshold range are respectively associated with the Mw interface data, and the first group identifiers of the associated Mw interface data are added respectively; All IMS interface data with the same first group of identifiers are formed into an IMS domain group call bill. 3. The method according to claim 2, wherein the EPC interface data subset comprises at least S1-MME interface data, S11 interface data and S6a interface data, wherein the S1-MME interface data and S6a interface data It includes at least the GUTI field, and the S11 interface data and the S1-MME interface data include at least the user identifier; correspondingly, each EPC interface data belongs to the EPC domain group call bill, specifically: Associating the S1-MME interface data and the S6a interface data with the same GUTI field and satisfying the preset fourth time threshold range, and adding a second group of identifiers respectively; Associating the S11 interface data with the same user identifier and satisfying the fifth time threshold range with the S1-MME interface data, and adding the second group identifier of the associated S1-MME to the S11 interface data All EPC interface data with the same identifier of the second group are formed into an EPC domain group call bill. 4. The method according to claim 3, wherein the PCC interface data subset includes at least Rx interface data and Gx interface data, wherein the Rx interface data and Gx interface data at least include a session_id field and the user correspondingly, attribute each PCC interface data to the PCC domain group call bill, specifically: Associating the Rx interface data and Gx interface data with the same session_id field and meeting the preset sixth time threshold range as the Rx data group with the first sub-identity and the Gx data group with the second sub-identity added; If there are Rx interface data and Gx interface data in the Rx data group and the Gx data group that have the same user ID and meet the preset seventh time threshold range, then associate the Rx data group and the Gx data group, and use the first Three sets of identifications replace the first sub-identity and the second sub-identity; The third group of PCC interface data with the same identifier is formed into a PCC domain group call bill. 5. The method according to claim 4, wherein, according to the user ID and the time stamp, the IMS domain group call bill, the EPC domain group call bill, and the PCC domain group call bill are associated with each other. The user group call bill is added, and the group identifier is added, wherein the interface data in the user group call bill is sorted according to the sequence of the timestamps, specifically: If there are MW interface data and Rx interface data that have the same user ID and meet the preset eighth time threshold range in the IMS domain group call bill, the PCC domain group call bill, and the EPC domain group call bill Or the Gx interface data and the S1-MME interface data, then associate the IMS domain group call bill, the PCC domain group call bill, and the EPC domain group call bill to form the user group call bill, and use all The group identifier replaces the first group identifier, the second group identifier and the third group identifier, wherein the interface data in the user group call bill is sorted according to the sequence of the time stamps. 6. The method according to any one of claims 1-5, wherein the segmented CDR specifically includes the establishment of a calling default bearer, the establishment of a calling dedicated bearer, the establishment of a calling IMS domain call, and the establishment of a called ISCSF office. Indirect addressing, called SCSCF addressing, called preselection, called IMS domain call establishment, called paging, called default bearer establishment, called dedicated bearer establishment, resource reservation, ringing trigger; The delay for obtaining each segmented CDR is described as follows: Obtain the calling default bearer establishment delay, the calling dedicated bearer establishment delay, the calling IMS domain call establishment delay, the called ISCSF interoffice addressing delay, the called SCSCF addressing delay, the called preselection delay, Called IMS domain call establishment delay, called paging delay, called default bearer establishment delay, called dedicated bearer establishment delay, resource reservation delay, ringing trigger delay. 7. A VoLTE call delay analysis device, characterized in that, comprising: an acquisition unit, configured to acquire an interface data set consisting of interface data related to the VoLTE call process within a preset time period, wherein each interface data at least includes a user identifier and a time stamp; wherein the interface data set at least includes an IMS Domain-related IMS interface data subsets, EPC domain-related EPC interface data subsets, and PCC domain-related PCC interface data subsets; a screening unit, configured to attribute each interface data to the user group call bill according to the user identifier and the time stamp, and sort the data in the order of the time stamp; an extraction unit, configured to divide the user group call bills into segmented bills with a preset number of segments according to the order in which the relevant interface data is generated in the VoLTE call process; a computing unit, configured to obtain the time delay of each segmented bill according to the timestamp of the interface data in the segmented bill; Wherein, the screening unit is specifically used for: According to the user ID and time stamp, each IMS interface data belongs to the IMS domain group call bill, each EPC interface data belongs to the EPC domain group call bill, and each PCC interface data belongs to the PCC domain group call bill; According to the user ID and time stamp, associate the IMS domain group call bill, the EPC domain group call bill, and the PCC domain group call bill as the user group call bill, and add a group ID, where the user group The interface data in the call bill is sorted according to the sequence of the timestamps. 8. An electronic device, characterized in that it comprises a memory and a processor, and the processor and the memory communicate with each other through a bus; the memory stores program instructions that can be executed by the processor. The processor invokes the program instructions to be able to perform the method as claimed in any one of claims 1 to 6. 9. A computer-readable storage medium on which a computer program is stored, characterized in that, when the computer program is executed by a processor, the method according to any one of claims 1 to 6 is implemented.

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