JP2007068093A - Ip telephone failure zone carving system and method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system to divide an IP telephone failure zone which monitors a packet by a call unit and specifies a SIP signaling abnormality and a packet loss zone in a short time. <P>SOLUTION: A monitoring manager 41 informs a monitoring agent 20 set near a SIP server about a telephone number of a subject to be monitored, and receives the SIP information of a call of the subject to be monitored and the IP address/UDP-Port information of a RTP packet from the monitoring agent 20. Then, the monitoring manager 41 transmits the IP address/UDP-port information of the RTP packet of the call of the subject to be monitored to the other monitoring agent 20, indicates monitoring the RTP packet, receives RTP packet monitoring information from the monitoring agent 20 for them, checks the received RTP packet monitoring information with each other, and determines the failure zone on an IP telephone network 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an IP telephone failure section isolation system for specifying a failure section on a call path in an IP telephone system (also simply referred to as “IP telephone”) for performing telephone communication via an IP (Internet Protocol) network. And a method.

In recent years, IP phones that perform voice calls using VoIP (Voice over IP) have become widespread. VoIP refers to a technology for realizing a voice call on an IP network such as the Internet.
In VoIP, a digitally-encoded voice signal is divided into packets at regular intervals and packetized and transmitted using an IP network with high line efficiency, so that the call charge can be reduced.

In this IP telephone call, first, a signaling protocol for controlling telephone calls such as SIP (Session Initiation Protocol) is used to connect to the other party's IP telephone, and then RTP (Real-time Transport Protocol) or the like. Voice data is exchanged by packet.
“Network analysis / analysis tool ASTEC Eyes on the net”, [online], R-Works, Inc. [searched August 15, 2005], Internet, <URL: http: //www.asteceyes.com/>

  By the way, products for measuring voice quality such as SIP signaling flow of this IP phone and packet loss rate are already on the market (for example, see Non-Patent Document 1). However, the currently sold measuring devices are mainly used for end-end quality measurement, and there is a problem that an abnormal section cannot be specified and monitoring that focuses on a telephone number cannot be performed.

  Further, in order to carry out the separation including the inside of the IP network, it is possible to monitor based on the statistical information of the protocol handled by the network interface of the aggregation switch or the relay router (commercially available product). However, this method has a problem that the measurement cannot be performed for a specific call because the measurement is performed in units of physical interfaces.

  In addition, failure isolation and failure recovery require a lot of work and time, such as on-site installation and recovery of the measuring instrument, data analysis, identification of the suspected location, and on-site response. Had a problem that it was difficult to deal with.

  The present invention has been made to solve such a problem, and its purpose is to enable packet monitoring on a call basis and to enable SIP signaling anomalies and packet loss intervals in a short time. An object of the present invention is to provide an IP telephone failure segmentation system and method.

  The present invention has been made to solve the above problems, and the IP telephone failure section isolation system of the present invention is provided at a plurality of locations on the IP telephone network and monitors call packets of telephone numbers to be monitored. A monitoring agent that transmits the monitoring information of the packet to the monitoring manager, and a monitoring manager that receives the monitoring information of the packet from the monitoring agents arranged at the plurality of locations and identifies a failure section on the IP telephone network. An IP telephone failure segmentation system configured, wherein the monitoring manager has a monitoring agent position information acquisition unit that acquires position information of the monitoring agent used for monitoring, and a plurality of monitoring agents on a call path, Monitored phone numbers, information about monitored call packets, and monitoring of packets Alternatively, packet monitoring instruction transmitting means for transmitting end instruction information, packet monitoring information receiving means for receiving packet monitoring information of a call to be monitored from the plurality of monitoring agents, and packet monitoring received from the plurality of monitoring agents Failure section specifying means for determining a failure section on the IP telephone network based on the information and the position information, and the monitoring agent is a telephone number to be monitored and information on a call packet to be monitored Monitoring target packet information receiving means for receiving from the monitoring manager, packet monitoring instruction receiving means for receiving instruction information for starting or ending packet monitoring from the monitoring manager, and monitoring the call packets to be monitored Packet monitoring means and a packet for transmitting monitoring information of the packet to the monitoring manager Characterized in that it comprises a preparative monitor information transmission means.

  Further, in the IP telephone failure section isolation system according to the present invention, the monitoring agent monitors a call control packet of the telephone number to be monitored instead of a call packet of the telephone number to be monitored, and the packet monitoring instruction The transmission means transmits a telephone number to be monitored and instruction information for starting or ending packet monitoring to a plurality of monitoring agents on the call path, and the monitoring target packet information receiving means is to be monitored. The telephone number is received from the monitoring manager, and the packet monitoring means monitors a call control packet of the telephone number to be monitored.

  Further, in the IP telephone failure section isolation system according to the present invention, the monitoring agent monitors a call control packet of the telephone number to be monitored together with a call packet of the telephone number to be monitored, and the packet monitoring instruction transmission means Transmits, to a plurality of monitoring agents on the call path, a telephone number to be monitored, information on the call packet to be monitored, and instruction information for starting or ending packet monitoring, and the monitoring target packet information The receiving means receives the telephone number to be monitored and information related to the call packet to be monitored from the monitoring manager, and the packet monitoring means has the call packet to be monitored and the telephone number to be monitored. The call control packet is monitored.

  The IP telephone failure section isolation method according to the present invention is provided at a plurality of locations on the IP telephone network, monitors call packets of telephone numbers to be monitored, and transmits monitoring information of the packets to the monitoring manager. An IP telephone failure segmentation method for receiving a packet monitoring information from a monitoring agent and a monitoring agent arranged at the plurality of locations and determining a failure segment by a monitoring manager that identifies the failure segment on the IP telephone network. A first step of acquiring position information of the monitoring agent used for monitoring by the monitoring manager; information on a telephone number to be monitored and information on a call packet to be monitored for a plurality of monitoring agents on a call path; And the monitoring manager transmit the packet monitoring start / end instruction information. A second step; a third step of receiving packet monitoring information of a call to be monitored from the plurality of monitoring agents by the monitoring manager; packet monitoring information received from the plurality of monitoring agents; and the position information; And a fourth step of determining a failure section on the IP telephone network by the monitoring manager, a telephone number to be monitored, and information on a call packet to be monitored from the monitoring manager to the monitoring agent. A fifth step of receiving by the monitoring agent the packet monitoring start or end instruction information from the monitoring manager, and a step of monitoring the monitoring target call packet by the monitoring agent. 7 and the monitoring information of the packet is changed to the monitoring agent. Characterized in that by preparative having an eighth step of transmitting to the monitoring manager.

  In the IP telephone failure section isolation method according to the present invention, the monitoring agent monitors a call control packet of a telephone number to be monitored instead of a call packet of a telephone number to be monitored, A step of transmitting a telephone number to be monitored and instruction information for starting or ending monitoring of a packet to a plurality of monitoring agents on the call path; , Received from the monitoring manager, and the seventh step is to monitor a call control packet of the telephone number to be monitored.

  Further, in the IP telephone failure section isolation method according to the present invention, the monitoring agent monitors a call control packet of the telephone number to be monitored together with a call packet of the telephone number to be monitored, and the second step includes The telephone number to be monitored, information about the call packet to be monitored, and instruction information for starting or ending packet monitoring are transmitted to a plurality of monitoring agents on the call path, and the fifth step includes Receiving a telephone number to be monitored and information on the call packet to be monitored from the monitoring manager, wherein the seventh step is to call the call packet to be monitored and the telephone number to be monitored. The control packet is monitored.

  In the IP telephone failure section isolation system according to the present invention, packet monitoring agents are arranged at a plurality of locations in the IP telephone network, and the monitoring information of the call to be monitored is sent from the plurality of monitoring agents on the call path to the monitoring manager. Since the monitoring manager identifies the failure section of the IP telephone network based on the received packet monitoring information, packet monitoring can be performed on a call-by-call basis. Can be specified. In addition, it is possible to specify the suspected part of the failure by remote control. Moreover, since the on-site response is performed after the failure section is identified (specified) from a remote location, the work time can be shortened, and the failure section can be efficiently identified. In addition, by selecting a plurality of calls and monitoring the RTP packet loss status as a sample, it is possible to determine whether there is a network abnormality. In addition, by continuously conducting this investigation, it is possible to grasp the deterioration tendency of call quality, and it becomes possible to find problems early.

  Further, in the IP telephone failure section isolation method of the present invention, packet monitoring information of a monitoring target call is received from monitoring agents (a plurality of monitoring agents on the call path) arranged at a plurality of locations in the IP telephone network, Since the failure section on the IP telephone network is specified, it is possible to monitor packets in units of calls and to specify the packet loss section in a short time. In addition, it is possible to identify the suspected part of the failure by remote control. Moreover, since the on-site response is performed after the failure section is identified (specified) from a remote location, the work time can be shortened, and the failure section can be efficiently identified.

Next, the best mode for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration example of an IP telephone failure section isolation system according to a first embodiment of the present invention. In the IP telephone failure section isolation system 1 shown in FIG. 1, a user terminal 4 such as a telephone is connected to an IP telephone network 2 via an MG (Media Gateway) or a VoIP device 3.

  The IP telephone network 2 includes a SIP server 5 that performs call control and session establishment, a communication device 6 such as a relay router or an aggregation switch that relays RTP packets (voice data packets), and a SIP in a SIP sequence (call connection sequence). The monitoring agent 20 is configured to monitor packets and RTP packets (RTP traffic) for calls.

  In addition, the monitoring agent 20 installed in the network is communicatively connected to a monitoring manager 41 installed on the monitoring center 40 side.

  FIG. 2 is a diagram illustrating a configuration example of the monitoring agent. The monitoring agent 20 includes a terminal adapter unit (TAP) 22 that relays traffic to be monitored and a monitoring processing unit 23 that monitors packets (traffic).

  FIG. 3 is a diagram illustrating an installation example of a monitoring agent. The installation example illustrated in FIG. 3A is an example in which the monitoring agent 20 is arranged between the communication devices 6 to monitor the monitoring target traffic (packet). FIG. 3B is provided in the communication device 6. In this example, the monitoring agent 20 is connected to the mirroring port (monitoring port) to monitor the monitoring target traffic.

  In the IP telephone failure section isolation system 1 shown in FIG. 1, the monitoring manager 41 and the monitoring agent 20 use the SIP signaling (call control) abnormality of the IP telephone and the packet loss (loss) of RTP for transferring voice data. It is possible to identify an abnormal location by remote control.

  Further, as a “SIP signaling (call control) monitoring” function, the monitoring manager 41 notifies the monitoring agent 20 installed in the vicinity of the SIP server of the telephone number to be monitored, and instructs to start monitoring of the SIP packet. The monitoring agent 20 monitors a SIP signaling packet (SIP packet) related to a call of the telephone number, and transmits / receives a SIP packet transmission / reception state, a call IP address between terminals and UDP (User Datagram Protocol) port information in real time. Notify the monitoring manager 41.

  In addition, as a function of “monitoring loss of RTP packet for call”, the monitoring manager 41 notifies the monitoring agent 20 installed at a plurality of locations on the call path of the IP address and UDP port number acquired at the time of monitoring of SIP signaling, and RTP Instructs start or end of packet monitoring.

  Also, after the monitoring is completed, the monitoring manager 20 is notified of the number of RTP packets (by direction) monitored (measured) by the monitoring agent 20. The monitoring manager 41 matches the monitoring results of the monitoring agents 20 at a plurality of locations, and specifies a voice packet loss section.

  Note that the monitoring agent 20 does not send all the collected monitoring data (SIP packets, RTP packets) to the monitoring manager 41, but results of processing by the monitoring agent 20 (IP address, UDP port number, SIP packet transmission / reception status). , The number of RTP packets, etc.) to the monitoring manager 41. As a result, the amount of communication between the monitoring agent 20 and the monitoring manager 41 can be suppressed.

  Further, as a communication path between the monitoring agent 20 and the monitoring manager 41, a monitoring target communication network (inbound) or a monitoring control network (outbound) can be used. Also, a dedicated channel using TCP (Transmission Control Protocol) as a communication method or a network management protocol such as SNMP (Simple Network Management Protocol) can be used.

FIG. 4 is a flowchart illustrating an example of the operation of the monitoring agent. Hereinafter, the flow of the process will be described with reference to FIG.
When monitoring is started (step S11), a measurement start instruction is transmitted from the monitoring manager 41 to the monitoring agent 20 (step S12). The monitoring agent 20 determines whether it is SIP monitoring (SIP signaling (call control) monitoring) or RTP monitoring (call RTP packet loss monitoring) (step S13).

  If it is determined in step S13 that SIP monitoring is performed, the monitoring agent 20 for SIP monitoring starts monitoring the SIP sequence (connection sequence in SIP signaling) related to the call based on the monitored telephone number ( Step S14).

  Then, the monitoring manager 41 is notified in real time of the progress of SIP (including information known at that time such as the IP address for calling / UDP-Port). Further, the monitoring is stopped in response to the end or failure of the call or a stop instruction from the monitoring manager 41 (step S15).

  On the other hand, if it is determined in step S13 that RTP monitoring is performed, the monitoring agent 20 monitors RTP packets related to the call based on the IP address / UDP-Port number for RTP received from the monitoring manager 41. Start (step S16).

  Then, in response to a stop instruction from the monitoring manager 41, the RTP monitoring is terminated, and the number of observed RTP packets (per direction) is notified to the monitoring manager 41 (step S17).

  Then, it is determined whether or not to continue monitoring (step S18). If monitoring is continued, the process returns to a standby state waiting for an instruction from the monitoring manager 41 (step S12). If monitoring is not continued, monitoring is performed. Is stopped (step S19).

FIG. 5 is a flowchart showing an example of the operation of the monitoring manager. Hereinafter, the flow of the processing will be described with reference to FIG.
When monitoring is started (step S21), a telephone number to be monitored is input to the monitoring manager 41 in a standby state (step S22).

  The monitoring manager 41 notifies the monitoring agent 20 of the monitoring target telephone number and instructs to start monitoring (step S23). Then, the monitoring agent 20 notifies the monitoring manager 41 of the IP address / UDP-Port information for RTP monitoring.

The monitoring manager 41 notifies the monitoring agent 20 on the call path (on the RTP packet route of the call) of the call IP address / UDP-Port information and instructs the start of monitoring (step S24).
As for the position of the monitoring agent 20 on the call path, the call path on which the monitoring agent 20 exists is recorded in advance in a database (or other system). The monitoring agent 20 existing on the route is specified.
If the position of the monitoring agent 20 on the call path is not recorded in the database in advance, and the monitoring agent 20 installed on the call path to be monitored cannot be specified, the monitoring manager 41 sends an IP address. Instructs all monitoring agents 20 installed on the telephone network 2 to monitor RTP packets, and identifies the failure section of the IP telephone network 2 by adding the number of RTP packets observed by each monitoring agent 20 You may make it do.

  Thereafter, the monitoring agent 20 on the call path is instructed to stop monitoring (step S25), the packet number information received from the plurality of monitoring agents 20 is matched, and the packet loss section is specified (determined) (step S26).

For example, when the RTP packet of the monitoring target call passes the route of the monitoring agent A → the monitoring agent B → the monitoring agent C, the number of RTP packets measured by the monitoring agent A is 100, and the RTP packet measured by the monitoring agent B When the number is 80 and the number of RTP packets measured by the monitoring agent C is 70, the packet loss generated between the monitoring agent A and the monitoring agent B is 20, and between the monitoring agent B and the monitoring agent C The generated packet loss is determined to be 10.
Since the RTP packet flowing on the call path includes sequence number information in the order of transmission, the number of RTP packets actually observed by the monitoring agent is the last RTP packet received by the monitoring agent. By referring to the value divided by the difference between the sequence numbers of the RTP packets received first, the communication quality on the predetermined call path can be measured.

  Then, it is determined whether or not to continue monitoring (step S27). When monitoring is continued, the process returns to the standby state (step S22), and when monitoring is not continued, monitoring is stopped (step S28).

  As described above, the packet loss section can be specified by remote operation for the call of the telephone number to be monitored by the processing of the monitoring agent 20 and the monitoring manager 41 shown in FIGS.

FIG. 6 is a diagram illustrating an example of specifying a packet loss occurrence section of a specific call. Hereinafter, the flow of the processing will be described with reference to FIG.
First, the monitoring manager 41 notifies the monitoring agent 20 of the telephone number to be monitored and instructs the start of SIP monitoring (step S1). The monitoring agent 20 notifies the monitoring manager 41 of the SIP information to be monitored and the call IP address / UDP-Port information (step S2).

  The monitoring manager 41 notifies the monitoring agent 20 on the call path of the IP address / UDP-Port information of the monitored call and instructs the monitoring start (or end) of the RTP packet of the monitored call (step S3). . The monitoring agent 20 performs filtering of RTP packets based on the IP address / UDP-Port information of the monitoring target call, and extracts and monitors the RTP packet of the monitoring target call.

Thereafter, the monitoring manager 41 notifies each monitoring agent 20 of information for instructing the end of monitoring of the RTP packet, and the monitoring agent 20 ends the RTP packet monitoring.
The monitoring agent 20 notifies the monitoring manager 41 of RTP packet monitoring information (step S4). The monitoring manager 41 matches the RTP packet monitoring information received from each monitoring agent 20 and specifies the failure occurrence section (step S5).

  Through the processing described above, the failure section (packet loss section) on the call path in the IP telephone network can be specified by remote control for the telephone number to be monitored.

FIG. 7 is a diagram illustrating an example of the functional configuration of the monitoring agent and the monitoring manager, and shows the functions of the monitoring agent and the monitoring manager described above in an organized manner.
In FIG. 7, the monitoring agent 20 includes a control unit (including a CPU) 21 that performs overall control of the entire monitoring agent 20, a terminal adapter unit (TAP) 22 for monitoring by distributing (passing) packets, The monitoring processing unit 23 is configured.

  The monitoring target information receiving unit 24 in the monitoring processing unit 23 receives information on the telephone number to be monitored from the monitoring manager 41 or information on the packet of the monitoring target call from the monitoring manager 41 (IP / UDP-Port information or the like). It is a processing part for receiving. The packet monitoring instruction receiving unit (packet monitoring instruction receiving means) 25 receives instruction information for monitoring start (or end) of the SIP packet from the monitoring manager 41, or monitors the RTP packet of the monitored call from the monitoring manager 41. It is a processing unit for receiving start or end instruction information.

  The packet monitoring unit (packet monitoring means) 26 monitors (measures) the SIP packet of the telephone number to be monitored for the packet passing through the terminal adapter unit 22 or the monitoring target for the packet passing through the terminal adapter unit 22. A processing unit for monitoring (measuring) a call. The packet monitoring information transmitting unit (packet monitoring information transmitting unit) 27 is a processing unit for transmitting SIP packet monitoring information to the monitoring manager 41 and transmitting measured RTP packet information to the monitoring manager 41. .

  On the other hand, the monitoring manager 41 includes a control unit (including a CPU) 42 that performs overall control of the entire monitoring manager 41, a database 43 that records position information of the monitoring agent 20 on the IP telephone network, and a processing program unit 50. It is configured.

The monitoring agent location information acquisition unit (monitoring agent location information acquisition means) 51 in the processing program unit 50 refers to the database 43 in which the location information of the monitoring agent on the IP telephone network is recorded, and the monitoring agent 20 on the IP telephone network. It is a process part for acquiring arrangement information in.
Instead of providing the database 43 in the monitoring manager 41, the monitoring manager 41 instructs all the monitoring agents 20 installed on the IP telephone network 2 to monitor RTP packets, and each monitoring agent 20 observes. The failure section of the IP telephone network 2 may be specified by adding the number of RTP packets.

  The packet monitoring instruction transmission unit (packet monitoring instruction transmission unit) 52 includes a SIP packet monitoring instruction transmission unit 53 and an RTP packet monitoring instruction transmission unit 54. The SIP packet monitoring instruction transmission unit 53 is a processing unit for notifying the monitoring agent 20 of a telephone number to be monitored and transmitting instruction information for monitoring start (or end) of the SIP packet. The RTP packet monitoring instruction transmission unit 54 is a process for transmitting to the monitoring agent 20 the IP address / UDP-Port information of the RTP packet of the monitoring target call and the monitoring start (or end) instruction information of the RTP packet. Part.

  The packet monitoring information receiving unit (packet monitoring information receiving unit) 55 includes a SIP packet monitoring information receiving unit 56 and an RTP packet monitoring information receiving unit 57. The SIP packet monitoring information receiving unit 56 is a processing unit for receiving from the monitoring agent 20 the SIP information of the monitoring target call and the IP address / UDP-Port information of the RTP packet. The RTP packet monitoring information receiving unit 57 is a processing unit for receiving the RTP packet monitoring information of the monitoring target call from the monitoring agent 20.

  Also, the failure section specifying unit (failure section specifying means) 58 matches the monitoring information of RTP packets received from a plurality of monitoring agents 20 on the call path, and determines a failure section on the IP telephone network. It is.

Next, an IP telephone failure section isolation system according to the second embodiment of the present invention will be described.
FIG. 8 is a diagram showing a configuration example of an IP telephone failure section isolation system according to the second embodiment of the present invention. Compared to the configuration example (see FIG. 1) of the IP telephone failure section isolation system according to the first embodiment, the difference is that no monitoring agent is installed between the SIP server 5 and the communication device 6. Further, the difference is that a monitoring agent 30 is installed instead of the monitoring agent 20. In addition, about the part which takes the same structure as 1st Embodiment, the same code | symbol is attached | subjected and those description is abbreviate | omitted.

FIG. 9 is a flowchart illustrating an example of the operation of the monitoring agent. Hereinafter, the flow of the process will be described with reference to FIG.
When monitoring is started (step S31), the monitoring manager 41 notifies the monitoring agent 30 of information on the telephone number to be monitored (step S32). The monitoring agent 30 starts SIP monitoring (SIP signaling (call control) monitoring) based on the telephone number notified in step S32 (step S33).

When the monitoring agent 30 receives the SIP packet, it determines whether or not the SIP packet is normal (step S34). The normality of the SIP packet means a state in which the call of the telephone number to be monitored is normally established. If the SIP packet is not normal, the process proceeds to step S37 described later. On the other hand, if the SIP packet is normal, it receives an instruction to start monitoring from the monitoring manager 41 and starts monitoring the RTP packet. When receiving a monitoring stop instruction from the monitoring manager 41 or when the call of the user terminal 4 with the telephone number to be monitored is terminated, monitoring of the RTP packet is stopped (step S35).
Then, the monitoring agent 30 notifies the monitoring manager 41 of the observed number of RTP packets (per direction) (step S36). Then, it is determined whether or not to continue monitoring (step S37). If monitoring is continued, the process returns to a standby state waiting for an instruction from the monitoring manager 41 (step S32). If monitoring is not continued, monitoring is performed. Stop (step S38).

FIG. 10 is a flowchart showing an example of the operation of the monitoring manager. Hereinafter, the processing flow will be described with reference to FIG.
When monitoring is started (step S41), a telephone number to be monitored is input to the monitoring manager 41 in a standby state (step S42).
The monitoring manager 42 notifies the monitoring agent 30 of the telephone number to be monitored and instructs the start of monitoring (step S43). Then, the monitoring manager 41 determines whether or not the SIP packet is normal based on information on the SIP packet notified from the plurality of monitoring agents 30 installed on the IP telephone network 2 (step S44). .

If the SIP packet is not normal, the cause of the SIP packet is displayed on the display screen of the monitoring manager 41 by referring to the content of the SIP packet (step S45). On the other hand, if the SIP packet is normal, after the elapse of the time to be monitored, after instructing the monitoring agent 30 to stop monitoring, the packet number information of the RTP packets transmitted from each monitoring agent 30 is matched. Thus, the packet loss section is specified (determined) (step S46).
If the position of the monitoring agent 30 on the call path is not recorded in the database in advance and the monitoring agent 30 installed on the call path to be monitored cannot be specified, the monitoring manager 41 sends the IP Instructs all monitoring agents 30 installed on the telephone network 2 to monitor RTP packets, and identifies the failure section of the IP telephone network 2 by adding the number of RTP packets observed by each monitoring agent 30 You may make it do.
Then, it is determined whether or not to continue monitoring (step S47). When monitoring is continued, the process returns to the standby state (step S42), and when monitoring is not continued, monitoring is stopped (step S48).

  As described above, the remote operation of the call of the telephone number to be monitored by the processing of the monitoring agent 30 and the monitoring manager 41 shown in FIGS. Thus, the packet loss section can be specified.

FIG. 11 is a diagram illustrating an example of identifying a packet loss occurrence section of a specific call. Hereinafter, the flow of the process will be described with reference to FIG.
First, the monitoring manager 41 notifies the monitoring agent 30 of the telephone number to be monitored and instructs to start monitoring (step S1). The monitoring agent 30 starts monitoring SIP packets and RTP packets for the telephone number (step S2). The monitoring agent 30 notifies the monitoring manager 41 of SIP packet monitoring results sequentially. Further, when receiving an instruction to stop monitoring from the monitoring manager 41, the monitoring agent 30 notifies the monitoring manager 41 of RTP packet monitoring information (step S3). The monitoring manager 41 matches the RTP packet monitoring information received from each monitoring agent 30 and identifies the failure occurrence section (step S4).

With the processing described above, the failure section (packet loss section) on the call path in the IP telephone network can be remotely detected without performing communication with the monitoring agent installed in the vicinity of the SIP server for the telephone number to be monitored. Can be specified by operation.
In the second embodiment described above, based on the number of RTP packets received from each monitoring agent 30, it is determined on which route on the IP telephone network 2 a failure has occurred. It is not limited to such a configuration. For example, in the present embodiment, information on SIP packets sequentially transmitted to the monitoring manager 41 from a plurality of monitoring agents 30 installed on the IP telephone network 2 is checked, and between the user terminals 4 to be monitored. By determining to which route the SIP packet is flowing, the route in which the failure has occurred can be specified.

  As described above, in the IP telephone failure section isolation systems according to the first and second embodiments described above, it is possible to monitor packets in units of calls, and it is possible to specify SIP signaling anomalies and packet loss sections in a short time. In addition, it is possible to specify the suspected part of the failure by remote control. Since on-site handling is performed after the failure section is isolated (specified) from a remote location, the work time can be shortened and the fault section can be efficiently identified. In addition, by selecting a plurality of calls and monitoring the RTP packet loss status as a sample, it is possible to determine whether there is a network abnormality. In addition, by continuously conducting this investigation, it is possible to grasp the deterioration tendency of call quality, and it becomes possible to find problems early.

  In the first embodiment described above, a case where the monitoring agent monitors either a SIP packet or an RTP packet as shown in FIG. 4 will be described, and in the second embodiment described above, as shown in FIG. As described above, the case where the monitoring agent monitors both the SIP packet and the RTP packet has been described. However, the present invention is not limited to such processing. For example, when monitoring a SIP packet with a monitoring agent, monitoring an RTP packet, or monitoring a SIP packet and an RTP packet, any one of three processes may be selected and executed.

  The monitoring agents 20 and 30 and the monitoring manager 41 described above have a computer system inside. A series of processes related to the above-described process is stored in a computer-readable recording medium in the form of a program, and the above-described process is performed by the computer reading and executing this program.

  That is, in each processing in the monitoring agents 20 and 30 and the monitoring manager 41, a central processing unit such as a CPU reads the above program into a main storage device such as a ROM or RAM, and executes information processing and arithmetic processing. This is realized.

  Here, the computer-readable recording medium means a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, a semiconductor memory, or the like. Alternatively, the computer program may be distributed to the computer via a communication line, and the computer that has received the distribution may execute the program.

  Although the embodiment of the present invention has been described above, the IP telephone failure section isolation system, the monitoring manager, and the monitoring agent according to the present invention are not limited to the above illustrated examples, and do not depart from the gist of the present invention. Of course, various changes can be made within the range.

  In the present invention, it is possible to monitor packets in units of calls, and because it is possible to identify SIP signaling anomalies and packet loss sections in a short time, the present invention is useful for IP telephone failure section isolation systems and methods, etc. It is.

It is a figure which shows the structural example of the IP telephone failure area isolation | separation system by the 1st Embodiment of this invention. It is a figure which shows the structural example of a monitoring agent. It is a figure which shows the example of installation of the monitoring agent. It is a flowchart which shows the example of operation | movement of a monitoring agent. It is a flowchart which shows the example of operation | movement of a monitoring manager. It is a figure which shows the example which pinpoints the generation | occurrence | production area of the packet loss of a specific call. It is a figure which shows the function structural example of a monitoring agent and a monitoring manager. It is a figure which shows the structural example of the IP telephone failure area isolation | separation system by the 2nd Embodiment of this invention. It is a flowchart which shows the example of operation | movement of a monitoring agent. It is a flowchart which shows the example of operation | movement of a monitoring manager. It is a figure which shows the example which pinpoints the generation | occurrence | production area of the packet loss of a specific call.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 IP telephone failure section isolation system 2 IP telephone network 3 MG or VoIP equipment 4 User terminal 5 SIP server 6 Communication equipment 20 Monitoring agent 21 Control part 22 Terminal adapter unit 23 Monitoring processing unit 24 Monitoring object packet information receiving part 25 RTP packet monitoring Instruction receiving unit 26 RTP packet monitoring unit 27 RTP packet monitoring information transmitting unit 30 monitoring agent 40 monitoring center 41 monitoring manager 42 control unit 43 database 50 processing program unit 51 monitoring agent position information acquiring unit 52 packet monitoring instruction transmitting unit 53 SIP packet monitoring Instruction transmitting unit 54 RTP packet monitoring instruction transmitting unit 55 Packet monitoring information receiving unit 56 SIP packet monitoring information receiving unit 57 RTP packet monitoring information receiving unit 58 Fault section identification Part

Claims (6)

A monitoring agent that is provided at a plurality of locations on the IP telephone network, monitors a call packet of a telephone number to be monitored, and transmits monitoring information of the packet to a monitoring manager, and a monitor disposed at the plurality of locations An IP telephone failure section isolation system comprising a monitoring manager that receives packet monitoring information from an agent and identifies a failure section on an IP telephone network,
The monitoring manager
Monitoring agent position information acquisition means for acquiring position information of the monitoring agent used for monitoring;
A packet monitoring instruction transmitting means for transmitting to a plurality of monitoring agents on the call path, a telephone number to be monitored, information on the call packet to be monitored, and instruction information for starting or ending packet monitoring;
Packet monitoring information receiving means for receiving packet monitoring information of a call to be monitored from the plurality of monitoring agents;
A failure section specifying means for determining a failure section on the IP telephone network based on the packet monitoring information received from the plurality of monitoring agents and the position information;
The monitoring agent is
Monitoring target packet information receiving means for receiving a telephone number to be monitored and information on the call packet to be monitored from the monitoring manager;
Packet monitoring instruction receiving means for receiving instruction information for starting or ending packet monitoring from the monitoring manager;
Packet monitoring means for monitoring the call packet to be monitored;
And a packet monitoring information transmitting means for transmitting the monitoring information of the packet to the monitoring manager. The monitoring agent monitors a call control packet of a telephone number to be monitored instead of a call packet of the telephone number to be monitored;
The packet monitoring instruction transmission means transmits a telephone number to be monitored and instruction information for starting or ending packet monitoring to a plurality of monitoring agents on the call path,
The monitoring target packet information receiving means receives a telephone number to be monitored from the monitoring manager,
The IP telephone failure section isolation system according to claim 1, wherein the packet monitoring means monitors a call control packet of the telephone number to be monitored. The monitoring agent monitors the call control packet of the telephone number to be monitored together with the call packet of the telephone number to be monitored,
The packet monitoring instruction transmission means transmits a telephone number to be monitored, information on a monitored packet to be monitored, and instruction information for starting or ending packet monitoring to a plurality of monitoring agents on the call path. ,
The monitoring target packet information receiving means receives from the monitoring manager a telephone number to be monitored and information related to the monitoring target call packet,
2. The IP telephone failure section isolation system according to claim 1, wherein the packet monitoring unit monitors the call packet to be monitored and the call control packet of the telephone number to be monitored. A monitoring agent that is provided at a plurality of locations on the IP telephone network, monitors a call packet of a telephone number to be monitored, and transmits monitoring information of the packet to a monitoring manager, and a monitor disposed at the plurality of locations An IP telephone failure section isolation method that receives packet monitoring information from an agent and determines a failure section by a monitoring manager that identifies a failure section on an IP telephone network,
A first step of acquiring position information of the monitoring agent used for monitoring by the monitoring manager;
A second step of transmitting, by the monitoring manager, a plurality of monitoring agents on the call path, information on the telephone number to be monitored, information on the call packet to be monitored, and instruction information for starting or ending packet monitoring When,
A third step of receiving, by the monitoring manager, packet monitoring information of a call to be monitored from the plurality of monitoring agents;
A fourth step of determining a failure section on the IP telephone network by the monitoring manager based on the packet monitoring information received from the plurality of monitoring agents and the location information;
A fifth step of receiving, by the monitoring agent, the telephone number to be monitored and the information on the call packet to be monitored from the monitoring manager;
A sixth step of receiving, by the monitoring agent, instruction information for starting or ending packet monitoring from the monitoring manager;
A seventh step of monitoring the call packet to be monitored by the monitoring agent;
An eighth step of transmitting monitoring information of the packet by the monitoring agent to the monitoring manager;
An IP telephone fault segmentation method characterized by comprising: The monitoring agent monitors a call control packet of a telephone number to be monitored instead of a call packet of the telephone number to be monitored;
The second step transmits a telephone number to be monitored and instruction information for starting or ending packet monitoring to a plurality of monitoring agents on the call path,
The fifth step receives a telephone number to be monitored from the monitoring manager,
The IP telephone failure section isolation method according to claim 4, wherein the seventh step monitors a call control packet of the telephone number to be monitored. The monitoring agent monitors the call control packet of the telephone number to be monitored together with the call packet of the telephone number to be monitored,
The second step transmits, to a plurality of monitoring agents on the call path, a telephone number to be monitored, information on the call packet to be monitored, and instruction information for starting or ending packet monitoring,
The fifth step receives from the monitoring manager a telephone number to be monitored and information about the call packet to be monitored,
5. The IP telephone failure section isolation method according to claim 4, wherein the seventh step monitors the call packet to be monitored and the call control packet of the telephone number to be monitored.

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