CN112770363A

CN112770363A - VoLTE residence problem positioning method, device and equipment

Info

Publication number: CN112770363A
Application number: CN201911002710.7A
Authority: CN
Inventors: 王国荣; 王广平; 王丽莉; 李蔚; 桂国富; 胡晶; 王君诚; 武苑
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Anhui Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Anhui Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2021-05-07
Anticipated expiration: 2039-10-21
Also published as: CN112770363B

Abstract

The embodiment of the invention relates to the technical field of communication, and discloses a method, a device and equipment for positioning a VoLTE (Voice over Long term evolution) residence problem. The method comprises the following steps: for a CSFB (Circuit switched Fall Back) scene, establishing a signaling feature library related to a CSFB call and signaling features; judging the state of the user in the IMS domain when the CSFB occurs according to the CSFB backflow signaling feature library; and determining the reason of the CSFB backflow according to the state of the user in the IMS domain when the CSFB occurs. The embodiment of the invention can quickly and effectively position the problem area.

Description

VoLTE residence problem positioning method, device and equipment

Technical Field

The embodiment of the invention relates to the technical field of communication, in particular to a method, a device and equipment for positioning a VoLTE (voice over long term evolution) residence problem.

Background

Voice over Long-Term Evolution (VoLTE) is a Long Term Evolution (LTE) Voice solution based on an IP Multimedia System (IMS) network, that is, a high definition Voice service based on IP is provided in an LTE coverage area. The most immediate experience that VoLTE technology brings to 4G users is shorter turn-on latency, and higher quality, more natural voice-video call effects.

The duration residence ratio of the VoLTE user refers to the ratio of the duration of the VoLTE service of the user with successful VoLTE opening to the total call duration, and is important embodiment of the comprehensive utilization rate and the comprehensive benefit of the VoLTE network. Based on automatic opening of VoLTE, an inventory user can be converted into a VoLTE user, but in the actual situation, after the inventory user is converted into the VoLTE user, telephone traffic is not completely transferred to 4G, and the time length residence ratio depth analysis optimization of the VoLTE user is needed. The duration residence ratio of the VoLTE user is improved, and the method has very important significance for improving user perception, 2G frequency replanning and frequency clearing network quitting, saving network resources, improving the income of the VoLTE user and the like. The prior art can not quickly and effectively locate the problem area, and further improves the duration residence ratio of the VoLTE service.

Disclosure of Invention

In view of the above problems, embodiments of the present invention provide a method, an apparatus, and a device for locating a VoLTE camping problem, so as to quickly and effectively locate a problem area.

According to an aspect of the embodiments of the present invention, there is provided a method for positioning a VoLTE camping problem, the method including:

for a CSFB (Circuit switched Fall Back) scene, establishing a signaling feature library related to a CSFB call and signaling features;

judging the state of the user in the IMS domain when the CSFB occurs according to the CSFB backflow signaling feature library;

and determining the reason of the CSFB backflow according to the state of the user in the IMS domain when the CSFB occurs.

In an optional manner, the signaling feature library for establishing a CSFB call and signaling feature association includes:

and establishing a signaling feature library related to the CSFB call and the signaling features by combining TAU signaling, Detach signaling, IMS registration and IMS deregistration signaling before and after the occurrence time of the CSFB call.

In an alternative form, the signalling features include:

CSFB communication occurs after registration;

CSFB communication occurs after logout;

after IMS continuous registration fails or is cancelled, TAU occurs in the 4G environment, the soft switch is displayed to be in an open state in the TAU, and the terminal does not initiate a registration process after the TAU process;

after the called domain selects the IMS domain, triggering the CS Retry after the called domain is not paged;

selecting a CS domain when the called domain is selected; and

when called, it is not anchored to the IMS domain, but to one or more of the CS domains.

In an optional manner, the method further comprises:

performing grid division in a set region for an SRVCC backflow scene and a CS backflow scene;

counting the call duration and VOLTE duration residence ratio of each grid;

and outputting a quality difference grid according to a screening rule based on the call duration and the VOLTE duration residence ratio.

In an alternative mode, performing grid division in the set area includes:

and performing grid division in a set area according to the longitude and latitude of the wireless cell to obtain a plurality of small grids of 500m x 500 m.

In an optional manner, the screening rule is that the average daily call duration is greater than a first preset value, and the grid with the retention ratio of the duration of the grid VOLTE being lower than a second preset value is a poor quality grid.

In an alternative mode, the first preset value is 10 hours, and the second preset value is 90%.

According to another aspect of the embodiments of the present invention, there is provided a positioning apparatus for a VoLTE camping problem, the apparatus including:

the establishment module is used for establishing a signaling feature library related to the CSFB call and the signaling features for the CSFB backflow scene;

the judging module is used for judging the state of the user in the IMS domain when the CSFB occurs according to the CSFB backflow signaling feature library;

and the determining module is used for determining the reason of the CSFB backflow according to the state of the user in the IMS domain when the CSFB occurs.

According to another aspect of the embodiments of the present invention, there is provided a positioning apparatus for a VoLTE camping problem, including: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is used for storing at least one executable instruction which is executed by the processor to realize the VoLTE residence problem positioning method.

According to another aspect of the embodiments of the present invention, there is provided a computer-readable storage medium, in which at least one executable instruction is stored, and the executable instruction is executed by a processor to implement the VoLTE parking problem location method as described above.

The embodiment of the invention carries out fine analysis by constructing the grid, can visually display the position of the high backflow area, can avoid the blindness of positioning the network problem by the grid or the cell and the one-sidedness of positioning the network problem by the abnormal event point, can quickly and effectively position the problem area, improves the optimization efficiency and improves the duration residence ratio of the VoLTE service.

The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and the embodiments of the present invention can be implemented according to the content of the description in order to make the technical means of the embodiments of the present invention more clearly understood, and the detailed description of the present invention is provided below in order to make the foregoing and other objects, features, and advantages of the embodiments of the present invention more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 shows a flowchart of a VoLTE camping problem positioning method according to an embodiment of the present invention;

FIG. 2 shows a schematic diagram of a grid cut refinement analysis;

fig. 3 shows a schematic flow chart of positioning VoLTE camping problem by using a signaling feature library correlation analysis method;

fig. 4 shows a schematic diagram of a CSFB backflow signaling feature library;

fig. 5 shows a schematic structural diagram of a VoLTE camping problem positioning apparatus according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram illustrating a VoLTE camping problem positioning apparatus according to another embodiment of the present invention;

fig. 7 is a schematic structural diagram illustrating a VoLTE camping problem positioning apparatus according to another embodiment of the present invention;

fig. 8 is a schematic structural diagram illustrating a VoLTE camping problem positioning apparatus according to another embodiment of the present invention;

fig. 9 shows a schematic structural diagram of a positioning apparatus for a VoLTE camping problem according to an embodiment of the present invention.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

The embodiment of the invention provides a VoLTE residence problem positioning method, which is based on a signaling data platform and adopts a grid deletion fine analysis method and a signaling feature library correlation analysis method to perform accurate positioning analysis on a backflow scene, so that the VoLTE duration residence ratio is improved. The backflow scene includes a Single Radio Voice Call Continuity (SRVCC), a Circuit Switch (CS), a Circuit Switched Fallback (CSFB), and other scenes.

Srvcc (single Radio Voice service continuity) is a Voice over LTE (Voice over LTE) service continuity scheme proposed by the third Generation Partnership Project (3 GPP), and mainly aims to solve the problem of how to ensure Voice Call continuity when a single Radio frequency User Equipment (UE) moves between an LTE/Pre-LTE network and a 2G/3G CS network, i.e., to ensure smooth handover of the single Radio frequency UE between VoIP Voice and CS domain Voice controlled by an IP Multimedia System (IMS).

CS is an earliest switching method in a communication network, and is also a switching method most commonly applied, and is mainly applied to a telephone communication network to complete telephone switching.

The CSFB technology is suitable for a scene of overlapping coverage of a 2G/3G circuit domain and a TD-LTE wireless network, the network structure is simple, an IMS system does not need to be deployed, and the investment of the existing CS network can be effectively utilized.

The residence ratio of the VoLTE duration is the proportion of the VoLTE call duration of the user with successful VoLTE opening to the total call duration, and is shown in the following formula:

for backflow scenes with clear reasons such as SRVCC and CS, a multidimensional clustering analysis method is adopted, single-factor influence analysis is carried out according to clustering and a control variable method by means of a signaling system, centralized problems of cities, manufacturers, terminals, scenes and the like are discovered, TOP cells, TOP manufacturers and TOP terminals are output, and optimization is carried out by combining wireless departments and terminal departments. The TOP cell in the communication field refers to a problem cell, such as a cell with a quality difference in the front, a TOP manufacturer is a manufacturer with a quality difference in the front, and a TOP terminal is a terminal with a quality difference in the front. The quality difference refers to the quality difference of the call, and is generally divided into three types, one is the quality difference caused by over coverage, one is the quality difference caused by weak coverage, and the other is the frequency point quality difference.

Specifically, a lattice-deletion fine analysis method is adopted during multi-dimensional cluster analysis, so that the position of a high backflow area can be visually displayed, the blindness of network problem positioning by a grid or a cell and the one-sidedness of network problem positioning by an abnormal event point can be avoided, and the optimization efficiency is improved.

As shown in fig. 1, a schematic flow diagram for positioning the VoLTE camping problem by using a grid-deletion refinement analysis method is shown. The method comprises the following steps:

step 110: performing grid division in a set region for an SRVCC backflow scene and a CS backflow scene;

specifically, the wireless cell may be divided into a plurality of small grids in a set area according to the longitude and latitude of the wireless cell, and the wireless cell may be divided into a plurality of small grids according to administrative areas, such as provinces, cities, and districts. The size of the grid can be defined according to the actual situation, such as 500m by 500 m. For example, in one specific example, the total province is divided into a grid of 500m by 500m and 24G cells within the grid are associated, as shown in fig. 2.

Step 120: counting the call duration and the VoLTE duration residence ratio of each grid;

after the grids are divided, the call duration and the residence time ratio of VoLTE duration of each grid can be counted, and the call duration and residence time ratio of VoLTE duration of all grids in the administrative area need to be counted.

Step 130: and outputting a quality difference grid according to a screening rule based on the call duration and the VoLTE duration residence ratio.

The screening rule can be set to be that the average daily call time is greater than a first preset value, and the grid with the residence ratio of the grid VoLTE time being lower than a second preset value is a quality difference grid. For example, the first preset value is 10 hours, the second preset value is 90%, that is, the grid-level average daily call duration is greater than 10 hours, and the grid VoLTE retention ratio is lower than 90%.

For a CSFB backflow scene, a signaling feature library correlation analysis method is adopted, detailed signaling such as Tracking Area Update (TAU), Detach (Detach), IMS registration, IMS logout and the like is combined, a signaling feature library is established in a combing mode, the state of a user in an IMS domain when CSFB occurs is judged, accurate positioning of problems is carried out, and the problems of a Random Adaptation Algorithm (RAA) message problem, a terminal abnormal mechanism, a user anchoring data error and the like of a Digital rising Audio Digital Rise (DRA) probabilistic non-forwarding Rate Adaptive Algorithm (RAA) can be found.

As shown in fig. 3, a schematic flow diagram for positioning the VoLTE camping problem by using the signaling feature library correlation analysis method is shown. The method comprises the following steps:

step 310: for a CSFB (Circuit switched Fall Back) scene, establishing a signaling feature library related to a CSFB call and signaling features;

step 320: judging the state of the user in the IMS domain when the CSFB occurs according to the CSFB backflow signaling feature library;

step 330: and determining the reason of the CSFB backflow according to the state of the user in the IMS domain when the CSFB occurs.

In this embodiment, a signaling feature library associated with the CSFB call and the signaling feature is established in combination with the TAU signaling, the Detach signaling, the IMS registration, and the IMS deregistration signaling before and after the CSFB call occurs. Wherein the signaling features include: CSFB communication occurs after registration; CSFB communication occurs after logout; after IMS continuous registration fails or is cancelled, TAU occurs in the 4G environment, the soft switch is displayed to be in an open state in the TAU, and the terminal does not initiate a registration process after the TAU process; after the called domain selects the IMS domain, the CS Retry is triggered after the called domain is not paged; selecting a CS domain when the called domain is selected; and one or more of not anchored to the IMS domain, anchored to the CS domain at the time of the call. As shown in fig. 4, it is a CSFB backflow signaling feature library.

The analysis idea and problem positioning method of six signaling features in the signaling feature library are introduced below, wherein the first three signaling features are three scenarios of MO (calling) and the last three signaling features are three scenarios of MT (called). The signaling analysis part is the state of the user in the IMS domain when CSFB occurs.

(1) The signaling characteristics are as follows: registration + CSFB

The signaling is characterized in that a user directly initiates a CSFB call or a user call failure is transferred to the CSFB call. The ratio of the situation is generally the highest, and is counted to 36.49% of the total ratio of the CSFB backflow scene, mainly because of failure of the terminal protection mechanism and the network side.

For the terminal protection mechanism to result in CSFB:

and (3) signaling analysis: the user registers in the IMS network, and directly carries out CSFB conversation when initiating a call.

The reason of the problem is as follows: the main scene is a weak coverage or poor quality area, and is a protection mechanism of the terminal in a weak field environment.

For network side failures resulting in CSFB:

and (3) signaling analysis: when a user calls a call, a network side fails, and the terminal falls back to trigger CSFB call according to failure reasons.

The reason of the problem is as follows: radio network reasons and DRA probabilistic non-forwarding of RAA messages result in failure of dedicated bearer establishment, or other network failures.

(2) The signaling characteristic II: user logout + CSFB

The user logout comprises terminal automatic logout and user active logout.

And automatically logging out the terminal:

and (3) signaling analysis: the CSFB call occurs after the user logs off.

The reason of the problem is as follows: the automatic terminal logout is mainly centralized on a certain type of terminal, and the terminal actively initiates logout when the electric frequency is confirmed to be lower than a certain value (such as-110 dbm) through field test.

For the user to log off actively:

and (3) signaling analysis: the CSFB call occurs after the user logs off.

The reason of the problem is as follows: and the user actively closes the VoLTE switch to trigger the logout of the IMS, and the calls are all CSFB after the logout.

(3) The signaling characteristics are three: TAU + CSFB

The signaling is characterized in that a TAU occurs in the 4G environment after the user fails to register or deregisters the IMS continuously, and the TAU displays that the soft switch is in an open state, but the terminal does not initiate a registration process after the TAU process. This accounts for a CSFB reflux ratio of 14.88%. The main reason is related to the terminal mechanism.

And (3) signaling analysis: TAU under 4G but no registration occurs after IMS continuous registration failure or logoff

The reason of the problem is as follows: the IMS continuous registration fails, and according to the terminal specification, the terminal does not register after the registration fails in the IMS domain for 2 times.

(4) The signaling characteristic is four: CS Retry

The signaling is characterized in that after the called domain selects the IMS domain, the CS Retry triggered after the called domain is not paged. This accounts for 22.21% of the CSFB reflux ratio. The main reason is that the terminal is in a weak coverage scenario.

And (3) signaling analysis: IMS domain paging fails, timer overtime triggers CS Retry

The reason of the problem is as follows: the terminal is in a weak coverage scene and cannot be paged when the IMS domain is paged, and the CSFB is triggered when the CS Retry is paged to the terminal.

(5) And a fifth signaling characteristic: domain selection to CS Domain

The signaling is characterized in that the CS domain is directly selected when the called domain is selected. This accounts for a CSFB reflux ratio of 15.37%. The main reason is that the user logs off in the IMS domain or after IMS registration, the SGSN information is not cleared at the HSS for some reason, resulting in the domain being selected to the CS domain.

And (3) signaling analysis: direct Domain selection to CS Domain

The reason of the problem is as follows: after the user logs off, the domain is selected to the CS domain; or the user is registered in the IMS, but the HSS for some reason does not clear the SGSN information resulting in a domain selection to the CS domain.

(6) Sixth, signaling characteristics: anchoring to CS Domain

This type of signaling is characterized by being not anchored to the IMS domain when called. The main reason is that when a user opens an account, the anchoring data is wrong, and a call directly occurs in the CS domain.

And (3) signaling analysis: direct anchoring to CS Domain

The reason of the problem is as follows: when the anchoring of the user is failed due to abnormal user account opening data, paging is sent to a CS domain, paging is carried out through SGSN vacancy, and CSFB communication occurs.

The embodiment of the invention aims at implementing the fine analysis on three backflow scenes, namely SRVCC, pure CS and CSFB, by constructing a grid fine analysis method and a signaling feature library analysis method, and can efficiently and accurately position the problems of abnormal account opening data, user behaviors, terminal mechanisms, network coverage and the like which influence the use of VoLTE high-definition services, thereby formulating an effective coping strategy and improving the duration residence ratio of the VoLTE user.

The grid deletion fine analysis method and the signaling feature library correlation analysis method aim at different backflow scenes respectively. The above methods may be used alone or in combination. For example, a signaling feature library correlation analysis method is only adopted for a CSFB backflow scene, or a lattice deletion refinement analysis method is only adopted for an SRVCC backflow scene and a CS backflow scene.

Fig. 5 shows a schematic structural diagram of a VoLTE camping problem positioning apparatus according to an embodiment of the present invention. As shown in fig. 5, the apparatus 500 includes: a setup module 510, a decision module 520, and a determination module 530.

The establishing module 510 is configured to establish a signaling feature library associated with a CSFB call and a signaling feature for a CSFB backflow scene; the judging module 520 is configured to judge, according to the CSFB backflow signaling feature library, a state of the user in the IMS domain when CSFB occurs; the determining module 530 is configured to determine a reason for CSFB backflow according to a state of a user in an IMS domain when CSFB occurs.

The establishing module 510 is configured to establish a signaling feature library associated with the CSFB call and the signaling feature in combination with the TAU signaling, the Detach signaling, the IMS registration, and the IMS deregistration signaling before and after the CSFB call occurs.

The signaling features include: CSFB communication occurs after registration; CSFB communication occurs after logout; after IMS continuous registration fails or is cancelled, TAU occurs in the 4G environment, the soft switch is displayed to be in an open state in the TAU, and the terminal does not initiate a registration process after the TAU process; after the called domain selects the IMS domain, triggering the CS Retry after the called domain is not paged; selecting a CS domain when the called domain is selected; and one or more of not anchored to the IMS domain, anchored to the CS domain at the time of the call.

As shown in fig. 6, the apparatus 500 further includes a grid module 540, a statistics module 550, and an output module 560.

The grid module 540 is configured to perform grid division in a set region for an SRVCC backflow scene and a CS backflow scene; the statistic module 550 is configured to count a call duration and a VOLTE duration residence ratio of each grid; the output module 560 is configured to output a quality difference grid according to a screening rule based on the call duration and the residence time ratio of the VOLTE duration.

The grid module 540 is configured to perform grid division in a set area according to the longitude and latitude of a wireless cell, so as to obtain a plurality of small grids of 500m × 500 m.

The screening rule is that the average daily call time is greater than a first preset value, and the grids with the grid VOLTE time residence ratio lower than a second preset value are poor grids. For example, the first preset value is 10 hours, and the second preset value is 90%.

For the specific implementation process of this embodiment, reference may be made to the description of the foregoing method embodiment, which is not described herein again.

Fig. 7 shows a schematic structural diagram of a VoLTE camping problem positioning apparatus according to an embodiment of the present invention. As shown in fig. 7, the apparatus 700 includes: a grid module 710, a statistics module 720, and an output module 730.

The grid module 710 is configured to perform grid division in a set region for an SRVCC backflow scene and a CS backflow scene; the statistic module 720 is configured to count the call duration and the VOLTE duration residence ratio of each grid; the output module 730 is configured to output the quality difference grid according to a screening rule based on the call duration and the residence ratio of the VOLTE duration.

The grid module 710 is configured to perform grid division in a set area according to the longitude and latitude of a wireless cell to obtain a plurality of small grids of 500m × 500 m.

As shown in fig. 8, the apparatus 700 further includes a setup module 740, a determination module 750, and a determination module 760.

The establishing module 740 is configured to establish a signaling feature library associated with a CSFB call and a signaling feature for a CSFB backflow scene; the judging module 750 is configured to judge, according to the CSFB backflow signaling feature library, a state of the user in the IMS domain when the CSFB occurs; the determining module 760 is configured to determine a reason for CSFB backflow according to a state of a user in an IMS domain when CSFB occurs.

The establishing module 740 is configured to establish a signaling feature library associated with the CSFB call and the signaling feature in combination with the TAU signaling, the Detach signaling, the IMS registration, and the IMS deregistration signaling before and after the CSFB call occurs.

An embodiment of the present invention provides a computer-readable storage medium, where at least one executable instruction is stored in the storage medium, and the executable instruction is executed by a processor to implement the VoLTE camping problem positioning method in any of the above method embodiments.

An embodiment of the present invention provides a computer program product, where the computer program product includes a computer program stored on a computer storage medium, and the computer program includes program instructions, and when the program instructions are executed by a computer, the VoLTE residence problem positioning method in any of the above-mentioned method embodiments is implemented.

Fig. 9 shows a schematic structural diagram of a VoLTE camping problem positioning device according to an embodiment of the present invention. As shown in fig. 9, the apparatus may include: a processor (processor)902, a communication Interface 904, a memory 906, and a communication bus 908.

Wherein: the processor 902, communication interface 904, and memory 906 communicate with one another via a communication bus 908. A communication interface 904 for communicating with other devices, such as a wechat server. The processor 902 is configured to execute the program 910, and may specifically execute the VoLTE camping problem positioning method in any of the above method embodiments.

In particular, the program 910 may include program code that includes computer operating instructions.

The processor 902 may be a central processing unit CPU, or an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits configured to implement an embodiment of the invention. The network device includes one or more processors, which may be the same type of processor, such as one or more CPUs; or may be different types of processors such as one or more CPUs and one or more ASICs.

A memory 906 for storing a program 910. The memory 906 may comprise high-speed RAM memory, and may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems may also be used with the teachings herein. The required structure for constructing such a system will be apparent from the description above. In addition, embodiments of the present invention are not directed to any particular programming language. It is appreciated that a variety of programming languages may be used to implement the teachings of the present invention as described herein, and any descriptions of specific languages are provided above to disclose the best mode of the invention.

In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the invention and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.

Furthermore, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specified otherwise.

Claims

1. A VoLTE camping problem positioning method, the method comprising:

2. The method of claim 1, wherein establishing a signaling feature library of CSFB calls and signaling feature associations comprises:

3. The method of claim 1, wherein the signaling feature comprises:

CSFB communication occurs after registration;

CSFB communication occurs after logout;

selecting a CS domain when the called domain is selected; and

4. The method of claim 1, further comprising:

counting the call duration and VOLTE duration residence ratio of each grid;

5. The method of claim 4, wherein performing the grid division in the defined area comprises:

6. The method of claim 5, wherein the filtering rule is that the average daily call duration is greater than a first preset value, and the grid with the grid VOLTE duration residence ratio lower than a second preset value is a poor quality grid.

7. The method according to claim 6, wherein the first preset value is 10 hours and the second preset value is 90%.

8. A VoLTE camping problem location apparatus, the apparatus comprising:

9. A VoLTE camping problem locating device, comprising: the system comprises a processor, a memory, a communication interface and a communication bus, wherein the processor, the memory and the communication interface complete mutual communication through the communication bus;

the memory is configured to store at least one executable instruction that is executed by the processor to implement the VoLTE park problem locating method of any one of claims 1-7.

10. A computer-readable storage medium having stored therein at least one executable instruction executed by a processor to implement the VoLTE park problem locating method as recited in any one of claims 1-7.