WO2015174628A1 - Système de mesure de qualité de service volte et procédé de mesure de qualité de service volte utilisant un agent de terminal - Google Patents

Système de mesure de qualité de service volte et procédé de mesure de qualité de service volte utilisant un agent de terminal Download PDF

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Publication number
WO2015174628A1
WO2015174628A1 PCT/KR2015/002525 KR2015002525W WO2015174628A1 WO 2015174628 A1 WO2015174628 A1 WO 2015174628A1 KR 2015002525 W KR2015002525 W KR 2015002525W WO 2015174628 A1 WO2015174628 A1 WO 2015174628A1
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volte
quality
client
information
dynamic
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PCT/KR2015/002525
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English (en)
Korean (ko)
Inventor
유용희
김대영
이준원
조종화
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주식회사 네이블커뮤니케이션즈
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Publication of WO2015174628A1 publication Critical patent/WO2015174628A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports

Definitions

  • 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.
  • 3GPP 3rd Generation Partnership Project
  • WCDMA Wideband Code Division Multiple Access
  • High Speed Downlink Packet Access 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.
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • 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.
  • EPC Evolved Packet Core
  • LTE Long Term Evolution
  • VoIP Voice over Internet Protocol
  • IMS IP multimedia subsystem
  • VoLTE Voice over LTE
  • VoIP Voice over LTE
  • VoIP Voice over LTE
  • VoIP Voice over LTE
  • 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.
  • DPI deep packet inspection
  • protocol analyzer a protocol analyzer
  • 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.
  • 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.
  • 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.
  • 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.
  • 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. .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the dynamic state information collected by the VoLTE client may include at least one of information of at least one other application installed in the terminal in which the client is installed.
  • 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.
  • 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 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.
  • the VoLTE quality measurement method may further comprise analyzing the static information, the dynamic state information and the dynamic measurement information.
  • 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 may further include reporting the combination when the predetermined condition is satisfied.
  • 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.
  • 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. .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • a method of measuring a VoLTE service quality of a user terminal in a quality assurance client 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.
  • 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.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • FIG. 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.
  • 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.
  • FIG. 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.
  • a VoLTE quality measurement system may include a VoLTE client, a quality assurance (QA) client, a quality analysis server, and a call server.
  • a separate quality assurance client may be installed on the client device in addition to the VoLTE client.
  • 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.
  • the quality assurance client may detect the progress call from the operating system of the user terminal and collect quality analysis information.
  • the quality analysis information may be classified into static information, dynamic state information, and dynamic measurement information according to Table 1.
  • static information of a user terminal 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 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 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.
  • MOS mean opinion score
  • 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.
  • Quality assurance client 120 may collect quality information for VoLTE calls.
  • the quality information may be dynamic state information on the current VoLTE call.
  • the quality assurance client 120 may also collect static information about the user terminal.
  • 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.
  • the communication device may inform the Quality Analysis Server that an error event has occurred.
  • the communication device may be a call server 140.
  • 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)
  • CSCF Call Session Control Function
  • IMS IP Multimedia Subsystem
  • CSFB circuit switched fall back
  • the CSFB means that the call is not connected to VoLTE but is connected to the 3G CS network and degraded in quality.
  • the quality analysis server 130 may request the quality assurance client 120 to deliver quality information.
  • 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.
  • the quality analysis server may transmit a quality information request message while continuously establishing a TCP connection with the quality assurance client.
  • 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.
  • the quality assurance client can convey the previously collected static information and dynamic state information.
  • the quality assurance client may deliver the quality information according to a predetermined method.
  • the dynamic state information corresponding to three VoLTE calls may be delivered immediately before the request for quality information.
  • dynamic state information corresponding to a VoLTE call for 30 minutes immediately before a request for quality information may be delivered.
  • 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.
  • the quality analysis server may determine quality information required by the quality assurance client.
  • the quality analysis server may analyze the cause of the error event by using the received quality information.
  • the location may be a shadow area, and thus additional repeaters or base stations may be solved.
  • kernel version 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.
  • a method for measuring a service quality of VoLTE in the quality analysis server 130 may be provided.
  • the quality analysis server may receive information about a VoLTE client, which is a VoLTE service quality measurement target, from a communication device.
  • the communication device may include a call server 140.
  • 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.
  • the quality analysis server may transmit a quality information request to a VoLTE client including a quality assurance client function.
  • 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.
  • the quality assurance client may be installed in the terminal where the VoLTE client is installed.
  • 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.
  • the quality assurance client may collect the dynamic state information of the VoLTE call before receiving the quality information request.
  • the quality analysis server may use the collected dynamic state information to find the cause of the error event of another VoLTE call.
  • FIG. 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.
  • 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.
  • 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.
  • the quality information may include static information and dynamic state information of the terminal.
  • the communication device may inform the Quality Analysis Server that an error event has occurred.
  • the communication device may be a call server 250.
  • 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.
  • CSFB circuit switched fall back
  • the quality analysis server 230 receiving the notification of the error event from the call server 250 may issue a QCI control command to the PCRF 240.
  • PCRF Policy and Charging Rules Function
  • the PCRF may receive service-related information and subscriber information to provide QoS and billing policies for services required by the subscriber.
  • 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.
  • QCI is a standard technology for guaranteeing VoIP service quality in LTE / IMS network defined in 3GPP TS23.320
  • QoS priority is specified in 1 ⁇ 9 levels for each service.
  • the PCRF may allocate a channel having the same QoS as that of the voice packet of the VoLTE call.
  • the quality analysis server 230 may request the quality assurance client 220 to deliver quality information.
  • 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.
  • the quality assurance client can convey the previously collected static information and dynamic state information.
  • the quality assurance client may deliver the quality information according to a predetermined method.
  • the quality analysis server 230 may predict the dynamic measurement information of the VoLTE call while exchanging test packets with the QA client 220.
  • 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.
  • 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.
  • 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.
  • the QA client may collect first dynamic measurement information from the received test packet.
  • the first dynamic measurement information may be dynamic measurement information for the downstream.
  • 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.
  • 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.
  • 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.
  • the quality analysis server may measure the second dynamic measurement information directly from the response packet received from the QA client.
  • the second dynamic measurement information may be dynamic measurement information for the upstream.
  • the quality analysis server may receive first dynamic measurement information from a QA client.
  • 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.
  • the quality analysis server may collect dynamic measurement information by using the first dynamic measurement information and the second dynamic measurement information.
  • the VoLTE client may include a quality assurance client.
  • VoLTE clients can collect quality information directly.
  • the quality analysis server 230 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.
  • FIG. 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.
  • a method of measuring quality of a VoLTE service 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.
  • the customer management server 330 may request quality information of the VoLTE network from the quality analysis server 320.
  • the customer management server may be a server operated by a customer care center.
  • the quality management server 320 may request quality information of the VoLTE network through the customer management server.
  • the customer care center may send the VoLTE client's phone number to the quality analysis server.
  • the quality analysis server may instruct the VoLTE client 310, including the quality assurance client function, to measure the quality of the VoLTE network.
  • the quality analysis server may instruct measurement of quality information through a TCP connection with a VoLTE client including a quality assurance client function.
  • 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.
  • 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.
  • 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.
  • the VoLTE client including the quality assurance client function may deliver the quality information according to a predetermined method.
  • the dynamic state information corresponding to three VoLTE calls may be delivered immediately before the request for quality information.
  • dynamic state information corresponding to a VoLTE call for 30 minutes immediately before a request for quality information may be delivered.
  • 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.
  • the quality analysis server may determine quality information required for a VoLTE client including a quality assurance client function.
  • the quality analysis server 320 may deliver the collected quality information to the customer management server 330.
  • the quality analysis server may store the collected data in the quality analysis server.
  • 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.
  • 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.
  • AP wireless LAN repeater
  • 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.
  • 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.
  • FIG. 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 VoLTE quality measurement system 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.
  • the customer management server 440 may request quality information of the VoLTE network from the quality analysis server 420.
  • 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.
  • the quality analysis server may instruct the VoLTE client 410, including the quality assurance client function, to measure the quality of the VoLTE network.
  • 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.
  • 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.
  • 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.
  • the VoLTE client 410 including the quality assurance client function may also collect static information about the terminal.
  • 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.
  • 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.
  • the timing of sending the collected static and dynamic state information does not necessarily have to be at this time.
  • the quality analysis server 420 may send a QCI control command to the PCRF 430.
  • 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.
  • QCI QoS Class Identifier
  • 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.
  • 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.
  • 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.
  • the VoLTE client including the quality assurance client function may collect first dynamic measurement information from the received test packet.
  • 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.
  • 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.
  • the second dynamic measurement information may be dynamic measurement information for the upstream.
  • the quality analysis server may receive first dynamic measurement information from a VoLTE client including a quality assurance client function.
  • 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.
  • the quality analysis server may collect dynamic measurement information by using the first dynamic measurement information and the second dynamic measurement information.
  • the quality analysis server 420 may deliver the collected quality information to the customer management server 440.
  • 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.
  • 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.
  • 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.
  • the first combination may be reported to a customer management server.
  • 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.
  • a quality measurement system of a VoLTE network may include a VoLTE client and a quality analysis server.
  • 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.
  • the VoLTE client may collect dynamic state information whenever there is a VoLTE call (511, 512, 513).
  • the dynamic state information may be collected while performing a call in the VoLTE client.
  • the VoLTE client can detect itself that an error event has occurred.
  • the error event may be an abnormal call termination or a CFSB.
  • the VoLTE client may transmit static information and dynamic state information related to the VoLTE client to the quality analysis server.
  • the quality analysis server included in the VoLTE client may transmit to the quality analysis server.
  • FIG. 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.
  • a quality measurement system of a VoLTE network may include a VoLTE client 610, a quality analysis server 620, and a PCRF 630.
  • 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.
  • the VoLTE client can detect that an error event has occurred.
  • the error event may be an abnormal call termination or a CFSB.
  • the VoLTE client may deliver static and dynamic state information related to the VoLTE client to the quality analysis server.
  • 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.
  • the quality analysis server may transmit a QCI control command to the PCRF 630.
  • 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.
  • the PCRF may allocate a channel having the same QoS as that of the voice packet of the VoLTE call.
  • QCI QoS Class Identifier
  • the quality analysis server 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.
  • a quality measurement system of a VoLTE network may include a VoLTE client 710, a session border controller server 720, a quality analysis server 730, and a PCRF 740.
  • 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.
  • the VoLTE client 710 and the session border controller 720 including the quality assurance client function may perform dynamic measurement information while performing a VoLTE call using a voice RTP packet. Can be collected.
  • 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.
  • SBC Session Border Controller
  • the session border controller 720 may collect dynamic measurement information regarding the upstream.
  • the VoLTE client can collect dynamic measurement information about the downstream.
  • 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.
  • the call server 740 may inform the quality analysis server that an error event has occurred.
  • the error event may include a call drop or a circuit switched fall back (CSFB).
  • CSFB circuit switched fall back
  • the quality analysis server 730 may request the session border controller 720 to transmit quality information.
  • the quality analysis server 730 may request the VoLTE client 710 to deliver quality information.
  • the VoLTE client may pass static information, dynamic state information, and dynamic measurement information to the quality analysis server.
  • the VoLTE client may deliver dynamic measurement information about the downstream to the quality analysis server.
  • 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.
  • 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.
  • a quality measurement system of a VoLTE network 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.
  • the customer management server 850 may request quality information of the VoLTE service from the quality analysis server 830.
  • the quality analysis server 830 may request quality information of the VoLTE service from the VoLTE client 810 and the session border controller 820.
  • 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.
  • 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.
  • SBC Session Border Controller
  • 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.
  • 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.
  • the VoLTE client may deliver dynamic measurement information about the downstream to the quality analysis server.
  • 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.
  • the session border controller 820 may deliver dynamic measurement information about the upstream to the quality analysis server.
  • FIG. 9 is a diagram illustrating a configuration of a quality analysis server in a VoLTE quality measurement system according to an embodiment.
  • the quality analysis server may include a client information receiver 910, a controller 920, and an information collector 930.
  • 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.
  • 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.
  • the client information receiving unit may receive the telephone number of the VoLTE client from a customer care server (customer care server).
  • the controller 920 may control to transmit a quality information request to the VoLTE client.
  • the controller 920 may transmit a quality information request to a quality assurance client that detects a VoLTE call of a VoLTE client.
  • the quality assurance client may be installed in the terminal where the VoLTE client is installed.
  • control unit may be assigned a channel by transmitting a QCI control command to the PCRF server.
  • the PCRF may allocate a channel having the same QoS as that of the voice packet of the VoLTE call.
  • the information collector 930 may receive static information and dynamic state information of the VoLTE client from the VoLTE client.
  • 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.
  • the information collector may collect the dynamic measurement information by using the voice test packet.
  • 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
  • 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.
  • the VoLTE client 1000 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. .
  • the dynamic state information collector 1010 may collect dynamic state information while performing a call.
  • 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.
  • 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.
  • the quality analysis server may transmit to the VoLTE client using the same channel as the VoLTE voice packet.
  • the VoLTE client may collect first dynamic measurement information from the received test packet.
  • the first dynamic measurement information may be dynamic measurement information for the downstream.
  • 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.
  • the dynamic measurement information collection unit 1020 may collect dynamic measurement information by using a test packet.
  • the transmitter 1040 may transmit static information, dynamic state information, and dynamic measurement information of the VoLTE client device to the quality analysis server.
  • 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.
  • a real-time transport protocol (RTP) packet may include an RTP header 1110 and an RTP payload 1120.
  • RTP real-time transport protocol
  • RTP voice real-time transport protocol
  • a method 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.
  • 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.
  • a method for determining the number of received missing packets, rearranged received packets, and jitter in an upstream.
  • the VoLTE client sends a time stamp to the RTP packet
  • the session border controller receives the received time stamp to measure the number of missed packets, rearranged packets, and jitter of the upstream.
  • 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.
  • 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.
  • upstream measurement information may be collected by a session border controller
  • 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.
  • time stamp information may be added using the RTP extension 1112 defined in the international standard for measuring packet delay.
  • 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.
  • 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.
  • 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.
  • 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.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Telephonic Communication Services (AREA)

Abstract

L'invention concerne un procédé pour mesurer la qualité d'un service VoLTE à l'aide d'un client d'assurance de la qualité (AQ) installé dans un terminal utilisateur. Un procédé pour mesurer la qualité d'un service VoLTE selon un mode de réalisation comprend les étapes consistant à : recevoir, à partir d'un dispositif de communication, des informations concernant un client VoLTE qui est soumis à une mesure de qualité de service VoLTE ; transmettre une requête d'informations de qualité au client VoLTE ; et recevoir, à partir du client VoLTE, des informations statiques et des informations d'état dynamique du client VoLTE.
PCT/KR2015/002525 2014-05-12 2015-03-16 Système de mesure de qualité de service volte et procédé de mesure de qualité de service volte utilisant un agent de terminal WO2015174628A1 (fr)

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KR1020140056446A KR101608582B1 (ko) 2014-05-12 2014-05-12 단말 에이전트를 활용한 VoLTE 품질 측정 시스템 및 VoLTE 품질 측정 방법

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