WO2015174628A1 - Volte quality measuring system and volte quality measuring method utilizing terminal agent - Google Patents

Abstract

Disclosed is a method for measuring the quality of a VoLTE service using a quality assurance client installed in a user terminal. A method for measuring the quality of a VoLTE service according to one embodiment comprises the steps of: receiving, from a communication device, information about a VoLTE client which is subject to VoLTE service quality measurement; transmitting a request for quality information to the VoLTE client; and receiving, from the VoLTE client, static information and dynamic state information of the VoLTE client.

Description

VOLTE Quality Measurement System and VOLTE Quality Measurement Method Using Terminal Agent

The following examples relate to quality analysis of VoLTE, and more particularly to quality analysis methods and systems that help find the cause of errors or analyze the cause of customer complaints when an error event occurs in a VoLTE call.

3rd Generation Partnership Project (3GPP) mobile communication systems based on Wideband Code Division Multiple Access (WCDMA) radio access technology are widely deployed around the world. High Speed Downlink Packet Access (HSDPA), which can be defined as the first evolution of WCDMA, provides 3GPP mobile communication systems with highly competitive wireless access technologies in the mid-term future.

Long Term Evolution (LTE) is a standard technology for 4G mobile communication that European camps have introduced after GSM and WCDMA, and is standardized by the Workgroup under the 3rd Generation Partnership Project (3GPP). LTE is a technology that overcomes the technical limitations of existing 3rd generation mobile communication systems and meets the needs of users for the next 10 years or more.It can expand coverage, improve system capacity, reduce data rate and delay, and reduce costs. At the same time, all measures to improve the quality of services provided are considered, and the mobile internet is strong.

Evolved Packet Core (EPC) or Long Term Evolution (LTE), the fourth generation of mobile communication, is a data-only network and provides Voice over Internet Protocol (VoIP) technology based on IP multimedia subsystem (IMS) to provide voice services that are the basis of mobile communication services. The service proposed to enable voice calls from EPC or LTE is referred to as VoLTE (Voice over LTE) service. In other words, VoLTE is a type of VoIP that refers to a communication technology for implementing a voice call through packet data based on an LTE network.

Users can experience various kinds of error events such as abnormal call drop, sound quality degradation, circuit switched fall back (CSFB), etc. while using VoLTE service. This phenomenon may occur due to various causes such as entry into a shadow area, an abnormality of a base station equipment, an equipment overload, an abnormality of a transmission equipment, an abnormality of an IMS network, and a malfunction of a terminal.

In order to find the cause of the error, there is an attempt to identify a problem in the network by placing a deep packet inspection (DPI) or a protocol analyzer in the network, but the state between the terminal and the base station and the state in the user terminal are unknown. I can't.

Embodiments can provide a technique for installing the agent in the user terminal to collect a variety of information through this and analyze the collected information to quickly determine the cause of the error.

In addition, embodiments may provide a technique for receiving information accumulated from a plurality of user terminals and using the same in quality analysis to increase the accuracy and reliability of error cause detection.

In addition, embodiments may provide a technique for identifying jitter, delay, packet loss, and the like without using a separate packet by using a voice RTP packet.

According to an embodiment, a method of measuring a service quality of VoLTE in a quality analysis server is provided.

The method of measuring the quality of service of the VoLTE may include receiving information about a VoLTE client to be VoLTE quality of service from a communication device, transmitting a request for quality information to the VoLTE client, and staticizing the VoLTE client from the VoLTE client. Receiving information and dynamic state information.

According to one side, receiving the dynamic state information of the VoLTE client from the VoLTE client may include receiving the dynamic state information collected by the VoLTE client from the VoLTE client before receiving the quality information request. .

According to another aspect, receiving dynamic state information of a VoLTE client from the VoLTE client may include receiving dynamic state information collected from the VoLTE client from the VoLTE client after receiving the quality information request. have.

In addition, according to one side, the method of measuring the quality of service of the VoLTE, transmitting a QCI control command to the PCRF server to ensure the same QoS as the packet of the VoLTE call, the channel is allocated, quality assurance using the assigned channel Exchanging a test packet with a client and collecting dynamic measurement information using the test packet.

According to another aspect, receiving information about a VoLTE client to be VoLTE quality of service measurement target from the communication device, receiving a telephone number of the VoLTE client associated with CSFB or abnormal call termination from the communication device can do.

In this case, receiving the information about the VoLTE client to be VoLTE quality measurement target from the communication device may include receiving a telephone number of the VoLTE client from a customer care server. The method may further include transmitting a report generated by processing at least one of the static information, the dynamic state information, and the dynamic measurement information to the customer management server.

According to one side, the static information of the VoLTE client, at least one of the model name of the terminal on which the VoLTE client is installed, the kernel version of the terminal on which the VoLTE client is installed, the OS version of the terminal on which the VoLTE client is installed, and the version of the VoLTE client. It may include.

According to the other side, the dynamic state information collected by the VoLTE client, the information of the LTE cell to which the VoLTE client belongs, the location information of the terminal where the VoLTE client is installed, the strength of the LTE signal received by the VoLTE client and the VoLTE It may include at least one of information of at least one other application installed in the terminal in which the client is installed.

According to another aspect, the step of collecting the dynamic measurement information using the test packet, the quality assurance client to the first dynamic measurement information collected by the quality assurance client from the test packet received by the quality assurance client Receiving from a client, measuring second dynamic measurement information from a test packet received from the quality assurance client over the assigned channel and using the first dynamic measurement information and the second dynamic measurement information Collecting measurement information.

At this time, the dynamic measurement information, the network round-trip delay time between the user terminal and the quality analysis server, jitter of the communication between the user terminal and the quality analysis server, the transmission and reception packets between the user terminal and the quality analysis server The number of received missing packets between the user terminal and the quality analysis server, the number of consecutive received missing packets between the user terminal and the quality analysis server, the number of rearranged received packets between the user terminal and the quality analysis server, Mean Opinion Score), and at least one of an R-Factor.

The collecting of the dynamic measurement information using the test packet may include transmitting the test packet including a time stamp through the assigned channel, from the VoLTE client to the VoLTE client. The method may include receiving a response packet including a time when the test packet was received and a time when the test packet was received, and collecting the dynamic measurement information using the test packet and the response packet.

According to another aspect, the VoLTE quality measurement method may further comprise analyzing the static information, the dynamic state information and the dynamic measurement information.

According to another aspect, the analyzing of the static information, the dynamic state information and the dynamic measurement information, the combination of at least one of the static information, the dynamic state information and the dynamic measurement information having an abnormality in VoLTE quality of service The method may further include reporting the combination when the predetermined condition is satisfied.

According to another embodiment, the method of measuring the quality of service of the VoLTE may include receiving information about a VoLTE client and a quality assurance client of a user terminal to be VoLTE quality of service measured from a communication device; Transmitting an information request and receiving static information and dynamic state information of a user terminal from the quality assurance client.

According to one side, receiving the dynamic status information from the quality assurance client may include receiving from the quality assurance client the dynamic status information collected at the quality assurance client prior to receiving the quality information request. .

According to another aspect, receiving dynamic status information from the quality assurance client may include receiving, from the quality assurance client, dynamic status information collected at the quality assurance client after receiving the quality information request. have.

According to an embodiment, a method of measuring a quality of service of a VoLTE in a VoLTE client may be provided.

The method of measuring a VoLTE quality of service includes collecting dynamic state information while performing a call in the VoLTE client, and in the event that a CSFB or abnormal call termination occurs, the static information and the dynamic state information of the VoLTE client. And transmitting to the quality analysis server.

According to one side, the VoLTE quality of service measuring method, transmitting and receiving a test packet with the quality analysis server using a channel allocated by the request of the quality analysis server, collecting the dynamic measurement information using the test packet And transmitting the collected dynamic measurement information to the quality analysis server.

According to another embodiment, a method of measuring a quality of service of a VoLTE in a VoLTE client may include collecting dynamic state information and dynamic measurement information while performing a call in the VoLTE client and the dynamic of the VoLTE client. And transmitting the status information and the dynamic measurement information to a quality analysis server.

According to one side, the step of collecting dynamic measurement information while performing a call (call) in the VoLTE client, the transmission time stamp in the RTP Extension field of the RTP packets associated with the VoLTE call that the VoLTE client exchanges with the SBC server, And transmitting and receiving including a time stamp recorded in an RTP extension field of a most recently received RTP packet and a time difference between a reception time of the most recently received RTP packet and a transmission time of a transmission RTP packet.

According to the other side, the step of collecting the dynamic measurement information while performing a call (call) in the VoLTE client, the first time stamp in the RTP Extension field of the first RTP packet associated with the call by the SBC server Receiving the inserted first RTP packet, and inserting a second time stamp into the RTP Extension field of the second RTP packet associated with the call and transmitting the second time stamp to the SBC server to collect the dynamic measurement information. .

According to an embodiment, a method of measuring a VoLTE service quality of a user terminal in a quality assurance client is provided. In the quality assurance client, a method of measuring the quality of a VoLTE service includes detecting a progress of a VoLTE call from an operating system of a user terminal, collecting dynamic state information about the VoLTE call, and when a CSFB or abnormal call termination occurs. And transmitting the static information of the user terminal and the collected dynamic state information to the quality analysis server.

According to one side, the method of measuring the quality of the VoLTE service in the quality assurance client, exchanging a test packet with the quality analysis server using a channel allocated by the request of the quality analysis server, using the test packet Collecting the dynamic measurement information and transmitting the collected dynamic measurement information to the quality analysis server.

1 is a diagram illustrating a method of collecting static information and dynamic state information to analyze VoLTE quality by installing a quality assurance client separately from a VoLTE client in a user terminal according to an embodiment.

2 is a diagram illustrating a method of collecting dynamic measurement information using a test packet to analyze a VoLTE quality by installing a quality assurance client separately from a VoLTE client in a user terminal according to an embodiment.

3 is a diagram for describing a method of receiving static information and dynamic state information by instructing a VoLTE client to measure quality when there is a request for quality information from a customer management server, according to an exemplary embodiment.

4 is a diagram for describing a method of receiving static information, dynamic state information, and dynamic measurement information by instructing a VoLTE client to measure quality when a request for quality information is made from a customer management server, according to an exemplary embodiment. .

FIG. 5 is a diagram for describing a method in which a VoLTE client directly generates quality information to detect an error event and delivers static information and dynamic state information to a quality analysis server.

6 illustrates a method in which a VoLTE client directly generates quality information to detect an error event, delivers static information and dynamic state information to a quality analysis server, and collects dynamic measurement information using a test packet. It is a figure for following.

FIG. 7 is a diagram for describing a method of measuring quality of VoLTE by generating dynamic measurement information using an RTP packet between a VoLTE client and a session border controller according to an embodiment.

FIG. 8 illustrates a method of measuring quality of VoLTE by receiving static information request from a customer management server and generating static information, dynamic state information, and dynamic measurement information by using an RTP packet between a VoLTE client and a session border controller. A diagram for explaining.

9 is a diagram illustrating a configuration of a quality analysis server in a VoLTE quality measurement system according to an embodiment.

FIG. 10 illustrates a configuration of a VoLTE client device in a VoLTE quality measurement system according to an exemplary embodiment.

FIG. 11 illustrates an RTP packet in a VoLTE quality measuring method according to an exemplary embodiment.

Specific structural or functional descriptions of the embodiments according to the inventive concept disclosed herein are merely illustrated for the purpose of describing the embodiments according to the inventive concept, and the embodiments according to the inventive concept. These may be embodied in various forms and are not limited to the embodiments described herein.

Terms such as first or second may be used to describe various components, but the components should not be limited by the terms. The terms are only for the purpose of distinguishing one component from another component, for example, without departing from the scope of the rights according to the inventive concept, the first component may be called a second component, Similarly, the second component may also be referred to as the first component.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and are not construed in ideal or excessively formal meanings unless expressly defined herein. Do not.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a method of collecting static information and dynamic state information to analyze VoLTE quality by installing a quality assurance client separately from a VoLTE client in a user terminal according to an embodiment.

Referring to FIG. 1, a VoLTE quality measurement system according to an embodiment may include a VoLTE client, a quality assurance (QA) client, a quality analysis server, and a call server. According to an embodiment, a separate quality assurance client may be installed on the client device in addition to the VoLTE client. According to one side, the quality assurance client may be embedded in the client device from the beginning, or may be installed as an application that can be downloaded and installed.

According to an embodiment, the quality assurance client may detect the progress call from the operating system of the user terminal and collect quality analysis information. Here, the quality analysis information may be classified into static information, dynamic state information, and dynamic measurement information according to Table 1.

Referring to Table 1, static information of a user terminal according to an embodiment may include a model name of a user terminal on which a VoLTE client is installed, a kernel version of a terminal on which a VoLTE client is installed, an OS version of a terminal on which a VoLTE client is installed, and a version of a VoLTE client. It may include at least one.

The dynamic state information of the user terminal according to an embodiment may include at least one of information of an LTE cell to which the user terminal belongs, location information of the user terminal, strength of the LTE signal, and information of at least one other application installed in the user terminal. Can be.

Dynamic measurement information according to an embodiment, the network round-trip delay time between the user terminal and the quality analysis server, jitter of the communication between the user terminal and the quality analysis server, the number of packets transmitted and received between the user terminal and the quality analysis server, the user terminal And at least one of the number of received missing packets between the quality analysis server, the number of consecutive received missing packets between the user terminal and the quality analysis server, the number of rearranged received packets between the user terminal and the quality analysis server, a mean opinion score (MOS), and an R-factor. It may include.

The round trip delay time is the time taken for a packet to go to and from the receiving end. If this value is large, it may be a reason to suspect a delay for buffering or the like.

The number of transmitted and received packets, packet loss, missing packets, and rearranged received packets can be used to measure the current network state.

Jitter refers to signal instability, which is a measure of how accurately a packet arrives at the time it needs to arrive. That is, it is possible to measure how constant the interval of arrival time between each packet is. For example, when the sender sends a packet every one second, the jitter is low when the receiver comes in at one second intervals, and when the interval is farther or narrower, the jitter is high. This jitter can be obtained by including the time stamp in the packet and sending it to the receiver to find the deviation using this value.

The estimated MOS, R-Factor, is a quantitative measure of the voice quality that a person feels.

Static and dynamic state information is based on accumulated history to infer that a problem occurs in some combinations, or to collect values to speculate the cause of the problem by looking at the value of specific information. This value is measured to test sound quality quantitatively.

In steps 101, 102 and 103, whenever the VoLTE client 110 has a VoLTE call 111, 112, 113, the operating system of the user terminal notifies the quality assurance client of the call start event and finds out that the call is present. Quality assurance client 120 may collect quality information for VoLTE calls. Here, the quality information may be dynamic state information on the current VoLTE call. According to one side, the quality assurance client 120 may also collect static information about the user terminal. According to an embodiment, the quality assurance client may collect the terminal model number and the operating system version, which are static information, and the base station information, the location information, the strength of the LTE signal, the information of the applications installed on the client device, and the noise of the dynamic state information. Ratios (SNR) and the like. The quality assurance client collects quality information and sends it only when requested by the quality analysis server instead of every time it collects the collected quality information, thereby preventing excessive data from being stored in the quality analysis server and overloading the network. Can be prevented.

In step 104, the communication device may inform the Quality Analysis Server that an error event has occurred. The communication device may be a call server 140. According to an embodiment, a communication device, a billing device, or another network device for VoLTE, such as a Call Session Control Function (CSCF) of an IP Multimedia Subsystem (IMS), may have an abnormal call drop or a circuit switched fall back (CSFB). When an error event, such as the like, it is possible to inform the quality analysis server of which number of terminals an error event has occurred. Here, the CSFB means that the call is not connected to VoLTE but is connected to the 3G CS network and degraded in quality. According to one side, it is possible to receive the telephone number of the VoLTE client associated with the CSFB or abnormal call termination from the communication device.

In step 105, the quality analysis server 130 may request the quality assurance client 120 to deliver quality information. According to an embodiment, the quality assurance client 120 may detect the VoLTE call and collect the quality information in advance before the quality analysis server 130 requests the quality information. According to an embodiment, the quality analysis server may transmit a quality information request message while continuously establishing a TCP connection with the quality assurance client. According to another embodiment, the quality analysis server may request quality information by sending a push message or an SMS to a terminal where a quality assurance client is installed.

In step 106, the quality assurance client can convey the previously collected static information and dynamic state information. According to an embodiment, the quality assurance client may deliver the quality information according to a predetermined method. For example, the dynamic state information corresponding to three VoLTE calls may be delivered immediately before the request for quality information. As another example, dynamic state information corresponding to a VoLTE call for 30 minutes immediately before a request for quality information may be delivered. According to an embodiment, the quality assurance client may deliver specified quality information according to a predetermined method. For example, when an error event is abnormal call termination, only base station information and SNR information may be transmitted. According to an embodiment, the quality analysis server may determine quality information required by the quality assurance client.

According to an embodiment, the quality analysis server may analyze the cause of the error event by using the received quality information.

For example, if an abnormal call drop event occurs frequently when the SNR is low in a cell or a specific location of a specific base station, the location may be a shadow area, and thus additional repeaters or base stations may be solved.

For another example, in the case of a combination of a specific operating system and a specific terminal model, if there are many CSFB events, it can be expected that there is a software conflict between the operating system and the terminal model.

In another example, if a lot of abnormal call termination events occur even though the SNR is high, the problem occurs even though it is not a shaded area, so the problem can be solved by inspecting other equipment in the network.

For another example, by collecting information of the applications installed in the terminal, it is possible to analyze the influence of the specific application on the service quality based on the occurrence of a lot of abnormalities in the quality when the specific application is installed.

As another example, one may find that a particular combination of kernel version, VoLTE application version, base station information, operating system version, etc. causes many problems.

According to an embodiment, a method for measuring a service quality of VoLTE in the quality analysis server 130 may be provided.

First, the quality analysis server may receive information about a VoLTE client, which is a VoLTE service quality measurement target, from a communication device. According to an example, the communication device may include a call server 140. According to another example, the communication device may be a charging device or other network equipment. The information about the VoLTE client may include a phone number of a terminal where the VoLTE client is installed.

According to an embodiment, the quality analysis server may transmit a quality information request to a VoLTE client including a quality assurance client function. According to another embodiment, the quality analysis server may transmit a quality information request to a quality assurance client that is detecting a VoLTE call of a VoLTE client. In this case, the quality assurance client may be installed in the terminal where the VoLTE client is installed.

According to an embodiment, the quality analysis server may receive static information and dynamic state information of a terminal on which a VoLTE client is installed from a VoLTE client including a quality assurance client function. According to one side, the quality assurance client may collect the dynamic state information of the VoLTE call before receiving the quality information request. In this case, the quality analysis server may use the collected dynamic state information to find the cause of the error event of another VoLTE call.

2 is a diagram illustrating a method of collecting dynamic measurement information using a test packet to analyze a VoLTE quality by installing a quality assurance client separately from a VoLTE client in a user terminal according to an embodiment.

Referring to FIG. 2, in the method of collecting dynamic measurement information according to an embodiment, a channel is allocated by transmitting a QCI control command to a PCRF server to ensure the same QoS as a packet of a VoLTE call from a network. Exchanging a test packet with the quality assurance client using the data collection method and collecting dynamic measurement information using the test packet.

In steps 201, 202, and 203, whenever there is a VoLTE call 211, 212, 213 in the VoLTE client 210, the operating system of the user terminal sends a call start event through a call-related event receiver registered in advance. The quality assurance client 220, which informs of the presence of a VoLTE call, may collect quality information about the VoLTE call. Here, the quality information may include static information and dynamic state information of the terminal.

In step 204, the communication device may inform the Quality Analysis Server that an error event has occurred. The communication device may be a call server 250. In this case, the error event may include a call drop or a circuit switched fall back (CSFB). According to one side, it is possible to receive the telephone number of the VoLTE client associated with the CSFB or abnormal call termination from the communication device.

In step 205, the quality analysis server 230 receiving the notification of the error event from the call server 250 according to an embodiment may issue a QCI control command to the PCRF 240. Here, PCRF (Policy and Charging Rules Function) is a system that provides a charging policy based on the service and subscriber profile. The PCRF may receive service-related information and subscriber information to provide QoS and billing policies for services required by the subscriber.

According to an embodiment, the quality analysis server 230 may be assigned a channel by sending a QoS Class Identifier (QCI) control command which is previously present in the PCRF. Here, QCI is a standard technology for guaranteeing VoIP service quality in LTE / IMS network defined in 3GPP TS23.320, and QoS priority is specified in 1 ~ 9 levels for each service. According to one side, the PCRF may allocate a channel having the same QoS as that of the voice packet of the VoLTE call.

In step 206, the quality analysis server 230 may request the quality assurance client 220 to deliver quality information. According to an embodiment, the quality assurance client 220 may detect the VoLTE call and collect the quality information in advance before the quality analysis server 230 requests the quality information.

In step 207, the quality assurance client can convey the previously collected static information and dynamic state information. According to an embodiment, the quality assurance client may deliver the quality information according to a predetermined method.

In step 208, the quality analysis server 230 may predict the dynamic measurement information of the VoLTE call while exchanging test packets with the QA client 220.

According to an embodiment, the quality analysis server 230 may include a time stamp in the test packet and transmit the test packet to the QA client through a channel allocated from the PCRF 240. Here, the time stamp is a time mark displayed at a specific position to prove that data existed at a certain point, and refers to a time displacement parameter indicating a starting point of time. For example, the quality analysis server may transmit to the QA client using a channel having the same QoS as the voice packet of the VoLTE call. In this case, the QA client may collect first dynamic measurement information from the received test packet. For example, the first dynamic measurement information may be dynamic measurement information for the downstream.

According to an embodiment, the packet including the time stamp may be transmitted at a predetermined cycle. For example, a packet having a size similar to that of a voice packet of a VoLTE call may be transmitted in a period of 20 msec which is the same period as that of the voice packet of the VoLTE call. According to an embodiment, the packet including the time stamp may be transmitted for a predetermined time. For example, you can send for 10 seconds to make a statistically meaningful measurement.

According to an embodiment, the QA client 220 may transmit a response packet by including a time stamp including a time of receiving a test packet and a response time of transmitting a response packet. In this case, the quality analysis server may measure the second dynamic measurement information directly from the response packet received from the QA client. Here, the second dynamic measurement information may be dynamic measurement information for the upstream.

According to an embodiment, the quality analysis server may receive first dynamic measurement information from a QA client. According to another embodiment, the VoLTE client may deliver the first dynamic measurement information to the quality assurance client, and again the quality assurance client may deliver the first dynamic measurement information to the quality analysis server. According to an embodiment, the quality analysis server may collect dynamic measurement information by using the first dynamic measurement information and the second dynamic measurement information.

According to one embodiment, the VoLTE client may include a quality assurance client. In this case, VoLTE clients can collect quality information directly.

The quality analysis server 230 according to an embodiment may measure the service quality of VoLTE by analyzing static information, dynamic state information, and dynamic measurement information. According to an embodiment, the quality analysis server may analyze the cause of the error event by using the received quality information. For example, if an abnormal call drop event occurs frequently when the SNR is low in a cell or a specific location of a specific base station, the location may be a shadow area, and thus additional repeaters or base stations may be solved. For another example, in the case of a combination of a specific operating system and a specific terminal model, if there are many CSFB events, it can be expected that there is a software conflict between the operating system and the terminal model. In another example, if a lot of abnormal call termination events occur even though the SNR is high, the problem occurs even though it is not a shaded area, so the problem can be solved by inspecting other equipment in the network.

3 illustrates a method of receiving static information and dynamic state information by instructing a VoLTE client including quality assurance client to measure quality when there is a request for quality information from a customer management server, according to an exemplary embodiment. Drawing.

Referring to FIG. 3, a method of measuring quality of a VoLTE service according to an embodiment includes requesting quality information, instructing a quality measurement to be performed by a VoLTE client including a quality assurance client function, and a VoLTE client including a quality assurance client function. Collecting dynamic state information, generating static information and dynamic state information in the quality analysis server, and reporting to the customer management server.

In operation 301, the customer management server 330 may request quality information of the VoLTE network from the quality analysis server 320. According to an embodiment, the customer management server may be a server operated by a customer care center. For example, when the customer management center receives a complaint of a customer, the quality management server 320 may request quality information of the VoLTE network through the customer management server. In another example, the customer care center may send the VoLTE client's phone number to the quality analysis server.

In step 302, the quality analysis server may instruct the VoLTE client 310, including the quality assurance client function, to measure the quality of the VoLTE network. According to an embodiment, the quality analysis server may instruct measurement of quality information through a TCP connection with a VoLTE client including a quality assurance client function. According to another embodiment, the quality analysis server may request measurement of the quality information by sending a push message or SMS to a terminal on which a VoLTE client including a quality assurance client function is installed.

In step 303, the VoLTE client including the quality assurance client function may collect dynamic state information during the VoLTE call 311 progress. According to one side, the VoLTE client 310 including the quality assurance client function may also collect static information about the terminal.

In step 304, the VoLTE client including the quality assurance client function may deliver the generated dynamic state information and static information, which is unique to the terminal, to the quality analysis server. According to an embodiment, the VoLTE client including the quality assurance client function may deliver the quality information according to a predetermined method. For example, the dynamic state information corresponding to three VoLTE calls may be delivered immediately before the request for quality information. As another example, dynamic state information corresponding to a VoLTE call for 30 minutes immediately before a request for quality information may be delivered. According to an embodiment, the quality assurance client may deliver specified quality information according to a predetermined method. For example, when an error event is abnormal call termination, only base station information and SNR information may be transmitted. According to an embodiment, the quality analysis server may determine quality information required for a VoLTE client including a quality assurance client function.

In step 305, the quality analysis server 320 may deliver the collected quality information to the customer management server 330. According to an embodiment, the quality analysis server may store the collected data in the quality analysis server. According to another embodiment, the quality analysis server may process the collected quality information and transmit a report generated for the VoLTE network to the customer management server 330.

For example, when the SNR is low and the packet loss is large in a specific area where the user terminal device of the customer who requested the measurement is located, the shadow area may be determined and the report may be transmitted to the customer management server. If the problem is identified through the customer management server, the service provider can solve the problem by installing an additional base station, femtocell or repeater. Here, a femto cell refers to a very small mobile communication base station that connects a wireless LAN repeater (AP) to a high-speed internet line in a home or an office to make the Internet available to a mobile device.

In another example, where the measured customer's user terminal is located, if the SNR is high but jitter is high, you only need to find the cause of the jitter. In case of using a base station manufactured by two vendors (company A and company B), an error event does not occur at the company A base station, but if a problem occurs only at the company B base station, the model and operating system of the terminal may collide with the specific base station. You can check whether it is causing it.

4 illustrates a method of receiving static information, dynamic status information, and dynamic measurement information by instructing a VoLTE client including quality assurance client to measure quality when there is a request for quality information from a customer management server, according to an exemplary embodiment. A diagram for explaining.

Referring to FIG. 4, a VoLTE quality measurement system according to an embodiment may include a VoLTE client 410 including a quality assurance client function, a quality analysis server 420, a PCRF 430, and a customer management server 440. have.

In operation 401, the customer management server 440 may request quality information of the VoLTE network from the quality analysis server 420. According to an embodiment, the customer management server may be a server operated by a customer care center. For example, when a customer receives a complaint about the quality of a VoLTE service from the customer care center, the customer care center can forward the phone number of the customer with the complaint to the quality analysis server 420 via the customer management server 440. have.

In step 402, the quality analysis server may instruct the VoLTE client 410, including the quality assurance client function, to measure the quality of the VoLTE network. According to an embodiment, the quality analysis server may request quality information from a quality assurance client installed in a terminal of a customer who has received a complaint. According to another embodiment, the quality analysis server may request quality information directly from a VoLTE client including a quality assurance client function installed in a terminal of a customer who has received a complaint.

In step 403, the VoLTE client including the quality assurance client function installed in the terminal of the customer who received the complaint may collect dynamic state information during the VoLTE call 411 proceeding. According to one side, the VoLTE client 410 including the quality assurance client function may also collect static information about the terminal.

In step 404, the VoLTE client including the quality assurance client function may deliver the generated dynamic state information and static information, which is unique to the terminal, to the quality analysis server. According to an embodiment, the VoLTE client including the quality assurance client function may collect dynamic state information during a VoLTE call and transmit dynamic state information and static information while notifying the call analysis to the quality analysis server at the same time as the call is terminated. have. However, the timing of sending the collected static and dynamic state information does not necessarily have to be at this time.

In step 405, the quality analysis server 420 may send a QCI control command to the PCRF 430. According to an embodiment, the quality analysis server 420 may be assigned a channel by sending a QoS Class Identifier (QCI) control command that is previously present in the PCRF.

In step 406, the quality analysis server 420 may collect dynamic measurement information while exchanging test packets with the VoLTE client 410 including the quality assurance client function.

According to an embodiment, the quality analysis server 420 may include a time stamp in the test packet and transmit the test packet to a VoLTE client including a quality assurance client function through a channel allocated from the PCRF 430. For example, the quality analysis server may transmit to the VoLTE client including the quality assurance client function using the same channel as the voice packet of the VoLTE call. In this case, the VoLTE client including the quality assurance client function may collect first dynamic measurement information from the received test packet.

According to an embodiment, the VoLTE client 410 including the quality assurance client function may transmit a response packet by including a time stamp including a time of receiving a test packet and a response time of transmitting a response packet thereto. In this case, the quality analysis server may measure the second dynamic measurement information directly from the response packet received from the VoLTE client including the quality assurance client function. Here, the second dynamic measurement information may be dynamic measurement information for the upstream.

According to an embodiment, the quality analysis server may receive first dynamic measurement information from a VoLTE client including a quality assurance client function. According to another embodiment, the VoLTE client including the quality assurance client function may deliver the first dynamic measurement information to the quality assurance client, and a separate quality assurance client may also transmit the first dynamic measurement information to the quality analysis server. . According to an embodiment, the quality analysis server may collect dynamic measurement information by using the first dynamic measurement information and the second dynamic measurement information.

In step 407, the quality analysis server 420 may deliver the collected quality information to the customer management server 440. According to one embodiment, the quality analysis server may process the collected quality information and transmit a report generated for the VoLTE network to the customer management server 330. According to an embodiment, the quality of the VoLTE service may be measured by analyzing static information, dynamic state information, and dynamic measurement information. For example, when at least one combination of static information, dynamic state information, and dynamic measurement information satisfies a predetermined condition, it may be determined that there is an abnormality in VoLTE service quality. For another example, the quality management server may report to the customer management server a combination of at least one of static information, dynamic state information, and dynamic measurement information having an abnormality in VoLTE service quality. For example, there are more than a predetermined number of VoLTE clients having a first combination that shares a model version and a VoLTE application version, and if more than 50% of them experience an error event, the first combination may be reported to a customer management server. . As another example, when there are n VoLTE clients having a second combination that shares a certain position with a model version, and there is an abnormality of quality at 20% or more, the second combination may be reported.

FIG. 5 is a diagram illustrating a method in which a VoLTE client including a quality assurance client function directly collects quality information to detect an error event and delivers static information and dynamic state information to a quality analysis server.

Referring to FIG. 5, a quality measurement system of a VoLTE network according to an embodiment may include a VoLTE client and a quality analysis server. According to an embodiment, the VoLTE client may include a quality assurance client. Therefore, a quality assurance client included in VoLTE may collect information for quality analysis whenever a VoLTE call occurs (511, 512, 513). In other words, the VoLTE client has a quality assurance client function installed.

In steps 501, 502, and 503, the VoLTE client may collect dynamic state information whenever there is a VoLTE call (511, 512, 513). According to an embodiment, the dynamic state information may be collected while performing a call in the VoLTE client.

At step 504, the VoLTE client can detect itself that an error event has occurred. According to one embodiment, the error event may be an abnormal call termination or a CFSB.

In operation 505, when the VoLTE client detects an error event, the VoLTE client may transmit static information and dynamic state information related to the VoLTE client to the quality analysis server. According to an embodiment, the quality analysis server included in the VoLTE client may transmit to the quality analysis server.

6 illustrates a method in which a VoLTE client directly generates quality information to detect an error event, delivers static information and dynamic state information to a quality analysis server, and collects dynamic measurement information using a test packet. It is a figure for following. In this case, it is assumed that the VoLTE client includes the quality assurance client's functions.

Referring to FIG. 6, a quality measurement system of a VoLTE network according to an embodiment may include a VoLTE client 610, a quality analysis server 620, and a PCRF 630.

In steps 601, 602, and 603, the VoLTE client 610 may collect dynamic state information whenever there is a VoLTE call (611, 612, 613). According to an embodiment, the dynamic state information may be collected while performing a call in the VoLTE client.

In step 604, the VoLTE client can detect that an error event has occurred. According to one embodiment, the error event may be an abnormal call termination or a CFSB.

In step 605, the VoLTE client according to one embodiment may deliver static and dynamic state information related to the VoLTE client to the quality analysis server. According to an embodiment, the static information and the dynamic state information may be transmitted to the quality analysis server through the quality assurance client included in the VoLTE client.

In step 606, the quality analysis server according to an embodiment may transmit a QCI control command to the PCRF 630. According to an embodiment, the quality analysis server 630 may be assigned a channel by sending a QoS Class Identifier (QCI) control command that is previously present in the PCRF. According to one side, the PCRF may allocate a channel having the same QoS as that of the voice packet of the VoLTE call.

In step 607, the quality analysis server according to an embodiment may collect dynamic measurement information by exchanging test packets with a VoLTE client using a channel allocated from a PCRF at the request of the quality analysis server.

FIG. 7 is a diagram for describing a method of measuring quality of VoLTE by generating dynamic measurement information using an RTP packet between a VoLTE client and a session border controller according to an embodiment.

Referring to FIG. 7, a quality measurement system of a VoLTE network according to an embodiment may include a VoLTE client 710, a session border controller server 720, a quality analysis server 730, and a PCRF 740. Here, a session border controller (SBC) is a device installed in a VoIP network, and is a device that controls media streams and signals related to establishing, performing, and terminating telephone signals or other interactive media communications. According to one side, other equipment through which voice packets pass may be used instead of the session border controller.

In steps 701, 702, and 703, the VoLTE client 710 and the session border controller 720 including the quality assurance client function according to an embodiment may perform dynamic measurement information while performing a VoLTE call using a voice RTP packet. Can be collected.

According to one side, the VoLTE client may transmit and receive a time stamp for measuring the dynamic measurement information in the RTP Extension field of the RTP packet exchanged with the Session Border Controller (SBC) server 720.

According to an embodiment, the session border controller 720 may collect dynamic measurement information regarding the upstream. The VoLTE client can collect dynamic measurement information about the downstream.

At this time, the VoLTE client and the SBC server 720 transmit a time stamp in the RTP Extension field of the RTP packets associated with the VoLTE calls 711, 712, and 713, a time stamp recorded in the RTP Extension field of the most recently received RTP packet, and The dynamic measurement information can be collected by inserting and exchanging three pieces of information, the time difference between the reception time of the most recently received RTP packet and the transmission time of the transmission RTP packet. The RTP packet will be described in detail with reference to FIG. 11.

In step 704, the call server 740 may inform the quality analysis server that an error event has occurred. In this case, the error event may include a call drop or a circuit switched fall back (CSFB). According to one side, it is possible to receive the telephone number of the VoLTE client associated with the CSFB or abnormal call termination from the call server.

In operation 705, the quality analysis server 730 may request the session border controller 720 to transmit quality information.

In step 706, the quality analysis server 730 may request the VoLTE client 710 to deliver quality information.

In step 707, the VoLTE client may pass static information, dynamic state information, and dynamic measurement information to the quality analysis server. According to one embodiment, the VoLTE client may deliver dynamic measurement information about the downstream to the quality analysis server.

According to an embodiment, the static information, the dynamic state information, and the dynamic measurement information may be transmitted to the quality analysis server through the quality assurance client included in the VoLTE client.

In step 708, the session border controller 720 may pass the static information, dynamic state information, and dynamic measurement information to the quality analysis server. According to an embodiment, the session border controller 720 may transmit dynamic measurement information regarding the upstream to the quality analysis server.

FIG. 8 illustrates a method of measuring quality of VoLTE by receiving static information request from a customer management server and generating static information, dynamic state information, and dynamic measurement information by using an RTP packet between a VoLTE client and a session border controller. A diagram for explaining.

Referring to FIG. 8, a quality measurement system of a VoLTE network according to an embodiment may include a VoLTE client 810, a session border controller server 820, a quality analysis server 830, a PCRF 840, and a customer management server 850. It may include.

In operation 801, the customer management server 850 may request quality information of the VoLTE service from the quality analysis server 830.

In operation 802, the quality analysis server 830 may request quality information of the VoLTE service from the VoLTE client 810 and the session border controller 820.

In step 803, the VoLTE client 810 and the session border controller server 820 use voice RTP packets to generate static information, dynamic state information, and the like while the VoLTE client designated by the customer management server performs the VoLTE call 811. Dynamic measurement information can be collected.

According to one side, the VoLTE client may transmit and receive a time stamp for measuring the dynamic measurement information in the RTP Extension field of the RTP packet exchanged with the Session Border Controller (SBC) server 820.

According to an embodiment, the session border controller 820 may collect dynamic measurement information regarding the upstream. The VoLTE client 810 can collect dynamic measurement information about the downstream.

In step 804, the VoLTE client 810 may deliver quality information to the quality analysis server 830. The quality information may include at least one of static information, dynamic state information, and dynamic measurement information. According to one embodiment, the VoLTE client may deliver dynamic measurement information about the downstream to the quality analysis server.

In operation 805, the session border controller server 820 may transmit quality information to the quality analysis server 830. The quality information may include at least one of static information, dynamic state information, and dynamic measurement information. According to an embodiment, the session border controller 820 may deliver dynamic measurement information about the upstream to the quality analysis server.

9 is a diagram illustrating a configuration of a quality analysis server in a VoLTE quality measurement system according to an embodiment.

9, the quality analysis server according to an embodiment may include a client information receiver 910, a controller 920, and an information collector 930.

According to an embodiment, the client information receiver 910 may receive information about a VoLTE client, which is a VoLTE quality of service measurement object, from a communication device. The client information receiver 910 may receive information about a VoLTE client, which is a VoLTE quality of service measurement object, from a communication device. According to one side, the client information receiving unit 910 may receive the telephone number of the VoLTE client associated with the CSFB or abnormal call termination from the communication device. According to one side, the client information receiving unit may receive the telephone number of the VoLTE client from a customer care server (customer care server).

According to an embodiment, the controller 920 may control to transmit a quality information request to the VoLTE client. According to another embodiment, the controller 920 may transmit a quality information request to a quality assurance client that detects a VoLTE call of a VoLTE client. In this case, the quality assurance client may be installed in the terminal where the VoLTE client is installed.

According to an embodiment, the control unit may be assigned a channel by transmitting a QCI control command to the PCRF server. According to one side, the PCRF may allocate a channel having the same QoS as that of the voice packet of the VoLTE call.

According to an embodiment, the information collector 930 may receive static information and dynamic state information of the VoLTE client from the VoLTE client.

According to an embodiment, the information collector may transmit a test packet to the VoLTE client using an allocated channel by transmitting a QCI control command to a PCRF server.

According to an embodiment, the information collector may collect the dynamic measurement information by using the voice test packet. According to an embodiment, the first dynamic measurement information collected at the VoLTE client side from the test packet received by the VoLTE client is received from the VoLTE client, and the second dynamic measurement information is received from the test packet received from the VoLTE client through the assigned channel. May be measured, and dynamic measurement information may be collected using the first dynamic measurement information and the second dynamic measurement information.

FIG. 10 illustrates a configuration of a VoLTE client device in a VoLTE quality measurement system according to an exemplary embodiment.

Referring to FIG. 10, the VoLTE client 1000 according to an embodiment may include a dynamic state information collecting unit 1010, a dynamic measurement information collecting unit 1020, a test unit 1030, and a transmitting unit 1040. .

According to an embodiment, the dynamic state information collector 1010 may collect dynamic state information while performing a call.

According to an embodiment, when a CSFB or abnormal call termination occurs, the test unit 1030 may transmit and receive a test packet with the quality analysis server using a channel allocated by a request of the quality analysis server.

The quality analysis server may include a time stamp in the voice test packet and transmit the test packet to the VoLTE client through a channel allocated from the PCRF. Here, the time stamp is a time mark displayed at a specific position to prove that data existed at a certain point, and refers to a time displacement parameter indicating a starting point of time. For example, the quality analysis server may transmit to the VoLTE client using the same channel as the VoLTE voice packet. In this case, the VoLTE client may collect first dynamic measurement information from the received test packet. For example, the first dynamic measurement information may be dynamic measurement information for the downstream.

According to an embodiment, the test unit 1030 of the VoLTE client may transmit a response packet including a time stamp including a time when the test packet is received and a response time for transmitting the response packet.

According to an embodiment, the dynamic measurement information collection unit 1020 may collect dynamic measurement information by using a test packet.

According to an embodiment, the transmitter 1040 may transmit static information, dynamic state information, and dynamic measurement information of the VoLTE client device to the quality analysis server.

According to an embodiment, the transmitter may transmit the first dynamic measurement information to the quality analysis server. According to an embodiment, the transmitter may transmit the first dynamic measurement information to the quality assurance client, and the quality assurance client may also transmit the first dynamic measurement information to the quality analysis server.

FIG. 11 illustrates an RTP packet in a VoLTE quality measuring method according to an exemplary embodiment.

Referring to FIG. 11, a real-time transport protocol (RTP) packet according to an embodiment may include an RTP header 1110 and an RTP payload 1120.

By adding a time stamp to the voice real-time transport protocol (RTP) packet, only the voice RTP packet can check jitter, delay, packet loss, and the like.

According to one embodiment, a method is provided for determining the number of received missing packets, rearranged received packets, and jitter downstream. A Session Border Controller can be used to time stamp RTP packets on the network, and VoLTE clients can receive them to measure downstream missed packets, rearranged packets, and jitter. . For example, since the RTP packet already contains a sequence number indicating the packet sequence number, the number of missed packets and rearranged packets can be determined by looking at the sequence number of the RTP packet. At this time, jitter can be calculated based on the time stamp and the time the actual packet arrived.

According to one embodiment, a method is provided for determining the number of received missing packets, rearranged received packets, and jitter in an upstream. In this case, the VoLTE client sends a time stamp to the RTP packet, and the session border controller receives the received time stamp to measure the number of missed packets, rearranged packets, and jitter of the upstream.

In addition, the VoLTE client transmits a time stamp in the RTP Extension field of the RTP packets, a time stamp recorded in the RTP Extension field of the most recently received RTP packet, and a reception time of the most recently received RTP packet and a transmission time of the transmission RTP packet. If three pieces of information of time difference are inserted and transmitted, the session border controller can use this information to calculate the round trip delay time. Similarly, the Session Border Controller may include a transmission time stamp in the RTP Extension field of the RTP packets, a time stamp recorded in the RTP Extension field of the most recently received RTP packet, and a reception time of the most recently received RTP packet. If three pieces of information of the time difference between transmission times of the transmission RTP packet are inserted and transmitted, the VoLTE client can calculate the round trip delay time based on the three pieces of information.

If no session border controller exists in the network, other equipment (eg, P-CSCF, etc.) through which voice packets pass may be used to collect dynamic measurement information. According to one embodiment, upstream measurement information may be collected by a session border controller, and downstream measurement information may be collected by a VoLTE client device. The quality analysis server may receive quality measurement information collected from the VoLTE client. This has the effect of ensuring quality in real time during VoLTE calls without the need for extra steps and additional packets for quality assurance. The Timestamp 1111 of the RTP Header 1110 is not a sending time but a value indicating a time to be played and cannot be used for measuring dynamic measurement information.

According to an embodiment, time stamp information may be added using the RTP extension 1112 defined in the international standard for measuring packet delay. According to an embodiment, the RTP Extension 1112 may be defined according to a use purpose since only the standard for displaying the length is defined but the type is not defined. For legacy peers that recognize the RTP extension as an anomaly packet, although the RTP extension is an international standard, the session border controller removes the RTP extension 1112 (e.g., an RTP packet from the terminal to the peer to the peer), or adds it. (RTP packet from the peer to the measurement target terminal) and the role of collecting the quality measurement data.

Although the embodiments have been described by the limited embodiments and the drawings as described above, various modifications and variations are possible to those skilled in the art from the above description. For example, the described techniques may be performed in a different order than the described method, and / or components of the described systems, structures, devices, circuits, etc. may be combined or combined in a different form than the described method, or other components. Or even if replaced or substituted by equivalents, an appropriate result can be achieved.

Therefore, other implementations, other embodiments, and equivalents to the claims are within the scope of the claims that follow.

The method according to the embodiment may be embodied in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the media may be those specially designed and constructed for the purposes of the embodiments, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Claims (28)

1. In the VoLTE service quality measurement method,

   Receiving information about a VoLTE client to be VoLTE quality of service measurement from the communication device;

   Sending a request for quality information to the VoLTE client; And

   Receiving static and dynamic state information of a VoLTE client from the VoLTE client.
2. The method of claim 1,

   Receiving dynamic state information of a VoLTE client from the VoLTE client,

   Receiving dynamic state information collected from the VoLTE client from the VoLTE client prior to receiving the quality information request.

   VoLTE service quality measurement method comprising a.
3. The method of claim 1,

   Receiving dynamic state information of a VoLTE client from the VoLTE client,

   Receiving dynamic state information collected at the VoLTE client from the VoLTE client after receiving the quality information request.

   VoLTE service quality measurement method comprising a.
4. The method of claim 1,

   Sending a QCI control command to the PCRF server to receive a channel;

   Transmitting a test packet to the VoLTE client using the assigned channel; And

   Collecting dynamic measurement information using the test packet

   VoLTE service quality measurement method further comprising.
5. The method of claim 4, wherein

   Receiving information on the VoLTE client to be VoLTE quality of service measurement from the communication device,

   Receiving a telephone number of a VoLTE client associated with a CSFB or abnormal call termination from the communication device

   VoLTE service quality measurement method comprising a.
6. The method of claim 4, wherein

   Receiving information on the VoLTE client to be VoLTE quality of service measurement from the communication device,

   Receiving a phone number of the VoLTE client from a customer care server

   VoLTE service quality measurement method comprising a.
7. The method of claim 6,

   Transmitting a report generated by processing at least one of the static information, the dynamic state information, and the dynamic measurement information to the customer care server;

   VoLTE service quality measurement method further comprising.
8. The method of claim 1,

   Static information of the VoLTE client,

   A model name of a terminal on which the VoLTE client is installed;

   A kernel version of a terminal on which the VoLTE client is installed;

   An OS version of the terminal on which the VoLTE client is installed; And

   Version of the VoLTE client

   Method of measuring the quality of service of VoLTE comprising at least one of.
9. The method of claim 1,

   Dynamic state information collected by the VoLTE client,

   Information of the LTE cell to which the VoLTE client belongs,

   Location information of a terminal on which the VoLTE client is installed;

   The strength of the LTE signal received by the VoLTE client, and

   Information of at least one other application installed in the terminal where the VoLTE client is installed

   Method of measuring the quality of service of VoLTE comprising at least one of.
10. The method of claim 4, wherein

    Collecting dynamic measurement information using the test packet,

    Receiving first dynamic measurement information collected at the VoLTE client side from the VoLTE client from the test packet received by the VoLTE client;

    Measuring second dynamic measurement information from a test packet received from the VoLTE client over the assigned channel; And

    Collecting the dynamic measurement information by using the first dynamic measurement information and the second dynamic measurement information.

    VoLTE service quality measurement method comprising a.
11. The method of claim 4, wherein

    The dynamic measurement information,

    Network round trip delay time between the VoLTE client and the quality analysis server;

    Jitter in communication between the VoLTE client and the quality analysis server;

    Number of packets transmitted and received between the VoLTE client and the quality analysis server;

    Number of missing packets received between the VoLTE client and the quality analysis server;

    The number of consecutive received missing packets between the VoLTE client and the quality analysis server;

    A number of rearranged received packets between the VoLTE client and the quality analysis server;

    Mean Opinion Score (MOS), and

    R-Factor

    Method of measuring the quality of service of VoLTE comprising at least one of.
12. The method of claim 4, wherein

    Collecting dynamic measurement information using the test packet,

    Transmitting the test packet including a time stamp on the assigned channel;

    Receiving, from the VoLTE client, a response packet including a time when the VoLTE client receives the test packet and a response time; And

    Collecting the dynamic measurement information using the test packet and the response packet.

    VoLTE service quality measurement method comprising a.
13. The method of claim 4, wherein

    Analyzing the static information, the dynamic state information and the dynamic measurement information

    VoLTE service quality measurement method further comprising.
14. The method of claim 13,

    Analyzing the static information, the dynamic state information and the dynamic measurement information,

    Reporting a combination of at least one of the static information, the dynamic state information, and the dynamic measurement information having an abnormality in VoLTE quality of service satisfying a predetermined condition;

    VoLTE service quality measurement method further comprising.
15. In the method of measuring the quality of service of VoLTE in VoLTE client,

    Collecting dynamic state information while performing a call at the VoLTE client; And

    Transmitting static information and the dynamic state information of the VoLTE client to a quality analysis server when a CSFB or abnormal call termination occurs

    VoLTE service quality measurement method comprising a.
16. The method of claim 15,

    Transmitting and receiving a test packet to and from the quality analysis server using a channel allocated at the request of the quality analysis server;

    Collecting dynamic measurement information using the test packet; And

    Transmitting the collected dynamic measurement information to the quality analysis server.

    VoLTE service quality measurement method further comprising.
17. In the method of measuring the quality of service of VoLTE in VoLTE client,

    Collecting dynamic state information and dynamic measurement information while performing a call at the VoLTE client; And

    Transmitting the dynamic state information and the dynamic measurement information of the VoLTE client to a quality analysis server.

    VoLTE service quality measurement method comprising a.
18. The method of claim 17,

    Collecting dynamic measurement information while performing a call in the VoLTE client,

    Transmitting / receiving, by the VoLTE client, including a time stamp for measuring the dynamic measurement information in an RTP extension field of an RTP packet exchanged with an SBC server;

    VoLTE service quality measurement method comprising a.
19. The method of claim 18,

    Collecting dynamic measurement information while performing a call in the VoLTE client,

    Receiving, by the SBC server, the first RTP packet having a first time stamp inserted into the RTP Extension field of the first RTP packet associated with the call;

    Collecting the dynamic measurement information by inserting a second time stamp into the RTP Extension field of a second RTP packet associated with the call and sending it to the SBC server.

    VoLTE service quality measurement method comprising a.
20. In the method of measuring the quality of service VoLTE of the user terminal in the quality assurance client,

    Receiving a progress notification of a VoLTE call from an operating system of the user terminal;

    Collecting dynamic state information for the VoLTE call;

    Transmitting a static information of the user terminal and the collected dynamic state information to a quality analysis server when a CSFB or abnormal call termination occurs

    How to measure the quality of the VoLTE service on the quality assurance client, including.
21. The method of claim 20,

    Exchanging test packets with the quality analysis server using a channel allocated at the request of the quality analysis server;

    Collecting dynamic measurement information using the test packet; And

    Transmitting the collected dynamic measurement information to the quality analysis server.

    How to measure the quality of the VoLTE service in the quality assurance client that includes more.
22. A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 1 to 21.
23. In the server analyzing the quality of service of VoLTE,

    A client information receiver configured to receive information about a VoLTE client, which is a VoLTE service quality measurement target, from a communication device;

    A control unit which transmits a quality information request to the VoLTE client; And

    Information collecting unit for receiving static and dynamic state information of the VoLTE client from the VoLTE client

    VoLTE's service quality analysis server including.
24. The method of claim 23, wherein

    The control unit

    The channel is allocated by sending the QCI control command to the PCRF server,

    The information collecting unit,

    Send a test packet to the VoLTE client using the assigned channel,

    Collecting dynamic measurement information using the test packet

    VoLTE's quality of service analysis server.
25. The method of claim 23, wherein

    The client information receiver,

    Receiving a telephone number of a VoLTE client associated with CSFB or abnormal call termination from the communication device

    VoLTE's quality of service analysis server.
26. The method of claim 23, wherein

    The client information receiver,

    Receiving the VoLTE client's telephone number from a customer care server

    VoLTE's quality of service analysis server.
27. The method of claim 24,

    The information collecting unit,

    Receiving first dynamic measurement information collected at the VoLTE client side from the VoLTE client from the test packet received by the VoLTE client,

    Measure second dynamic measurement information from a test packet received from the VoLTE client through the assigned channel;

    Collecting the dynamic measurement information using the first dynamic measurement information and the second dynamic measurement information.

    VoLTE's quality of service analysis server.
28. For a VoLTE client device that measures VoLTE's quality of service,

    A dynamic state information collecting unit which collects dynamic state information while performing a call;

    When a CSFB or abnormal call termination occurs, the test unit for transmitting and receiving a test packet with the quality analysis server using a channel assigned by the request of the quality analysis server;

    A dynamic measurement information collection unit which collects dynamic measurement information using the test packet; And

    Transmitter for transmitting the static information, the dynamic state information and the dynamic measurement information of the VoLTE client device to the quality analysis server

    VoLTE client device comprising a.

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