JP3793159B2 - Control sequence test method in VoIP service, test device and capture device used in the test method, and computer program for realizing the test device and capture device - Google Patents

Description

[0001]
[Industrial application fields]
In the VoIP service developed on an IP network composed of a group of servers such as a plurality of physical call agents (Call Agents) and gate keepers (Gate Keepers) and a router, it is impossible to make a call from a user of the VoIP service. The present invention relates to a control signal sequence test method for instantly generating all control signal sequences from a transmitting terminal to a receiving terminal to identify a failure occurrence location .
The present invention also relates to a test apparatus and a capture apparatus used in the test method, and a computer program for realizing the test apparatus and the capture apparatus.
[0002]
[Prior art]
A failure on an IP network that provides a VoIP service requires early detection and early recovery.
Conventionally, communication data is collected and analyzed by a capture device that has been installed in the suspected suspected location in advance or after the suspected location has been identified, and necessary communication data is extracted for each captured communication data Then, the abnormality occurrence location was searched by checking the normality of the communication data (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-6-326752 [0004]
[Problems to be solved by the invention]
However, in the method described above, after identifying the location where the abnormality in the communication data is confirmed, in order to search the context in which the abnormality has occurred, the captured communication data is analyzed or the analyzed communication is performed. It took time to investigate the cause by determining the correlation between the data, and as a result, the influence on the VoIP service was great, such as delay in failure recovery.
[0005]
An object of the present invention is to analyze communication data automatically collected from a plurality of pre-installed capture devices, and to manage an end-to-end communication state between terminals in an integrated manner. To provide a control signal sequence test method and apparatus, and a computer program for realizing the apparatus, which are useful for accurately and quickly executing a series of failure handling operations from identification to cause investigation and failure recovery. is there.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is directed to a plurality of captures for a VoIP service deployed on an IP network including a group of servers such as a plurality of physical call agents (Gate Agents) and gate keepers (Gate Keepers) and a router. By processing communication data that is a control signal collected from a device, a call processing across a plurality of communication sections is generated as one call processing sequence, and a control sequence test method for identifying a failure occurrence location,
(1) A step of separating each communication data for each call processing by performing allocation for each Call ID for all communication data that is control signals collected from a plurality of capture devices,
(2) Next, a step of extracting communications for each of the plurality of call processes, which is presumed to be the same call process, by executing a search based on the incoming call number information and the power generation number information for communication data for each call process. ,
(3) a step of confirming normality by comparing the extracted communication data for each of the plurality of call processes with normal data stored in a database;
(4) a step of further identifying the section in which the data is captured from the source IP address and destination IP address of the communication data;
(5) a step of referring to a time stamp existing in each data item and determining that the communication data is related to the same call processing if there is no contradiction in the context.
(6) A step of generating all control signal sequences from a transmitting terminal to a receiving terminal across a plurality of spaces by connecting communication data related to the same call processing ,
( 7 ) a step of detecting a device receiving the final signal as a suspicious object of failure when the generated control signal sequence is not normally terminated;
Characterized in that it comprises and.
[0008]
The invention according to claim 2 is a control signal sequence test apparatus used in the test method described above, which is a VoIP service developed on an IP network composed of a plurality of servers such as physical call agents and gatekeepers, and a router. A capture device having a function of capturing only a packet related to a control signal of a designated protocol from all packets passing through, and a logic for converting the captured packet into communication data according to the protocol, In an environment where a packet from a customer terminal device that uses a VoIP service and a line connected to a server can be captured, the test device is a source for identifying the customer terminal device to be tested Phone number, destination phone number, IP address and terminal type An operation unit having a function of inputting and a function of displaying a response message; and a test unit connected to the capture device via a data communication network, and the test unit is allocated to each server and a terminal device of a customer. Correspondence table between captured IP addresses and capture devices connected on the same segment, correspondence table between customer terminal device telephone numbers and gatekeepers and call agents in which the terminal devices are accommodated, and communication for each protocol A database that stores normal data of data, a function that notifies the capture device of the start and end of capture, and a search request that uses the telephone number and IP address as a key to the database that it holds. A function for identifying a capture device, a function for acquiring communication data captured by the capture device, A data analysis function that determines the normality of each data item by comparing the communication data acquired from the capture device with normal data in the database, and logic to extract the necessary data from the communication data using a specific search key A data search function, a link function for linking a plurality of communication data by ascertaining the context by referring to source information, destination information and time information of a plurality of communication data obtained as a result of the search, and a link As a result, when the sequence is not completed normally, a suspicious object detection function is provided which makes the device receiving the final signal a suspicious object.
[0009]
The invention according to claim 3 is a capture device used in the test method described above, and has a function of capturing only a packet related to a control signal of a designated protocol from all packets passing, and using the captured packet as a protocol. It is characterized by comprising logic for converting to corresponding communication data.
[0010]
The invention according to claim 4 is a computer program for realizing the control signal sequence test apparatus, wherein the computer program includes:
A function included in the computer included in the operation terminal of the test apparatus is a function for inputting a source telephone number, a destination telephone number, an IP address and a terminal type for identifying a customer terminal apparatus to be tested, and a response message. Realize the function to display,
Correspondence table between the IP address allocated to each server or customer terminal device and the capture device connected on the same segment to the computer included in the test unit of the test device, the telephone number of the customer terminal device and the terminal The correspondence table with the gatekeeper and call agent that accommodates the device, the function of storing normal data of communication data for each protocol in the database, and the function of notifying the capture device of the start and end of capture A function for specifying a capture device to be tested by making a search request to the database using a telephone number or IP address as a key, a function for acquiring communication data captured by the capture device, and a communication acquired from the capture device Data terms by comparing the data with normal data in the database Data analysis function to determine the normality of each, data search function that is the logic to extract the necessary data from the communication data using a specific search key, and source information of multiple communication data obtained as a result of the search And a destination function and a time information by referring to the time information, a connection function for connecting a plurality of communication data, and a device that receives a final signal when the connected result sequence is not normally completed. A suspicious object detection function as a suspicious object is realized.
[0011]
The invention according to claim 5 is a computer program for realizing the capture device, wherein the computer program is:
A computer included in the capture device realizes a function of capturing only a packet related to a control signal of a specified protocol from all passing packets and a logical function of converting the captured packet into communication data according to the protocol. It is characterized by that.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a failure point detected for a VoIP service deployed on an IP network composed of a group of servers such as a plurality of physical call agents (CA) and gatekeepers (GK) and a router (not shown). To process multiple capture devices and communication data that is control signals collected from the capture devices, call processing across multiple communication sections is generated as a single call processing sequence (control signal sequence). 1 shows an overall configuration of an IP network system including a control signal sequence test device that identifies a location where a failure has occurred.
[0013]
The capture device is installed on the same segment as the subscriber terminal device and the line accommodated in the server such as the call agent CA, the gatekeeper GK, and the media gate MG (not shown) constituting the IP network. A function of capturing only a packet related to a control signal of a designated protocol from among the packets of the packet, and communication data such as a SIP message shown in FIG. It includes logic for converting into items included in the H.323 message.
[0014]
The control signal sequence test apparatus includes an operation terminal and a test apparatus main body connected to the capture apparatus via a data communication network. In the database DB of the test apparatus main body, the correspondence table between the IP addresses allocated to the respective servers and customer terminal devices and the capture devices connected on the same segment, the telephone number of the customer terminal device and the terminal device are stored. A correspondence table with accommodated gatekeepers and call agents and normal data of communication data for each protocol are registered in advance.
[0015]
Next, when the telephone number and IP address of the calling terminal, the telephone number and IP address of the destination terminal, and the protocol type are input from the operation terminal of the control signal sequence test apparatus, the test apparatus main body performs the test from the correspondence table of the database DB. And a function of transmitting a capture start request including a protocol type to the capture device. After the capture is started, the sequence generation requester executes connection processing from the transmission terminal to the reception terminal.
[0016]
Upon completion of connection processing, the test device itself has a function to collect communication data from the capture device and a function to determine normality for each data item by comparing the obtained communication data with normal data in the database. And a data search function that is a logic that extracts necessary data from communication data using a specific search key, and refers to source information, destination information, and time information of a plurality of communication data obtained as a result of the search. The function to generate a control signal sequence by concatenating multiple communication data, and the device receiving the final signal when the generated control signal sequence is not completed normally. And a suspicious object detection function.
[0017]
【Example】
As an example, the H.264 of a customer who uses a VoIP service. 323 terminal 1 to H.323 The procedure of the control signal sequence test when normal transmission processing to the 323 terminal 2 becomes impossible will be described with reference to FIGS.
[0018]
First, the operator of the business operator or the customer who has received the notification that the call cannot be sent is the terminal number and IP address of the terminal 1, the telephone number and IP address of the terminal 2, and the protocol type from the operation terminal of the control signal sequence test apparatus. . A test start command is transmitted to the control signal sequence test apparatus using 323 as an activation parameter (S1).
[0019]
The test apparatus body first makes a search request to the database using the telephone number as a key, and obtains the gatekeeper GK1 that is the accommodation destination of the terminal 1 and its IP address, and the gatekeeper GK2 that is the accommodation destination of the terminal 2 and its IP address. (S2).
Next, by executing a search request using the IP address as a key, the capture device A installed in the same network as GK1 and the capture device B installed in the same network as GK2 are specified (S3).
Protocol type H. to be captured for the specified capture device A and capture device B A capture start request is transmitted by designating 323 (S4).
[0020]
After confirming the capture start notification sent from the capture device (S5), the capture start notification is transmitted to the operation terminal (S6), and the capture start notification is displayed on the operation terminal (S7).
The test requester confirms the capture start notification, and then executes a transmission process from the terminal 1 to the terminal 2 (S8). In the capture device, SIP or H.264 that passes through the installed network. H.323 specified from a plurality of protocols such as H.323. Capture only the signal for 323.
Upon completion of the transmission process, the test device collects communication data from the capture device (S9). When communication data does not exist, such as when the terminal 2 is not connected to the network, the terminal 2 operates normally without target data in response to the collection request.
[0021]
The collected communication data are all H.264 data existing in the network where the capture device is installed. Since it is communication data transmitted from 323 terminals, it is classified by Call ID for H.323. The data is classified into communication data (H.323 message) for each 323 terminal (S10).
Further, a communication to be tested is performed by performing a search with communication data in which the telephone number of the terminal 1 is set in the outgoing telephone number information and the telephone number of the terminal 2 is set in the incoming telephone number information. Data is specified (S11).
[0022]
In the database, for example, H.264 as shown in FIG. The normal sequence of 323 and the data to be added to the sequence are stored, the identified communication data is collated with this normal data, and the data until the collation is used as data for creating the entire sequence ( S12).
When the source IP address of the communication data is the IP address of the terminal 1 and the destination IP address is the IP address of the terminal 2, it is specified as the communication data captured by the capture device A, and the source IP address is the IP address of the terminal 2 If the destination IP address is the IP address of the terminal 1, the communication data captured by the capture device B is identified, and the time sequence is confirmed and the time sequence is matched to create the entire sequence ( S13).
[0023]
As shown in FIG. 5, when the entire sequence is not normally completed, the device receiving the final signal is detected as a suspected object (S14).
If there is a suspected object, the entire sequence created together with the information on the suspected object is transmitted to the operation terminal (S15), and the entire sequence and the suspected object can be confirmed with the test requester by displaying on the operation terminal (S16). The suspicious target device can easily identify the location where an abnormality has occurred and the location where a failure has been repaired by notifying the test requester of the suspicious location by displaying it in red on the screen of the operation terminal.
[0024]
For example, H.264 accommodated in GK1. H.323 terminal 1 and H.264 accommodated in GK2. In the communication processing of the 323 terminal 2, the sequence of FIG. 5 is displayed as a normal processing result. However, when the terminal 2 is poorly contacted or malfunctions, GK2 after returning CALL PROCEEDING to the SETUP signal from the terminal 1 Although ARQ is transmitted to the terminal, since those signals are not transmitted, the sequence of FIG. 6 is displayed, so that the test requester can easily grasp that the terminal 2 is the suspected place.
[0025]
If GK2 is defective, an ARJ signal is originally returned in response to the ARQ signal from terminal 2, but since the signal is not transmitted, the sequence shown in FIG. 7 is displayed. It can be easily grasped as a place.
[0026]
The function of the control signal sequence test apparatus and the procedure of the control signal sequence test method according to the present invention have been described above. However, these functions and procedures can be realized by a computer included in the control signal sequence test apparatus. And a computer program for realizing the procedure.
[0027]
【The invention's effect】
In an IP network where multiple customers use the VoIP service provided by the operator, if the customer's outgoing processing is defective, the operator or the customer can perform complex signal analysis on the test equipment with a simple operation. In addition, the location where the abnormality has occurred and the failure device can be specified in a simple format, so that the failure handling operation can be executed accurately and quickly, and the degree of influence on the VoIP service can be minimized.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an IP network system for implementing a control signal sequence test method according to the present invention.
FIG. 2 is a diagram illustrating items included in a SIP message and an H.323 message.
FIG. 3 is a diagram showing an example of a customer who uses a VoIP service. 323 terminal 1 to H.323 It is a figure which shows the IP network system for demonstrating the control signal sequence test performed when the normal transmission process to 323 terminal 2 becomes impossible.
FIG. 4 is a diagram showing an example of a customer who uses a VoIP service. 323 terminal 1 to H.323 It is a figure which shows the procedure of the control signal sequence test in case the normal transmission process to 323 terminal 2 becomes impossible.
FIG. 5 is a diagram showing a normal control signal sequence.
FIG. 6 is a diagram showing a control signal sequence when the terminal 2 is faulty.
FIG. 7 is a diagram showing a control signal sequence when the gatekeeper GK2 is faulty.
[Explanation of symbols]
CA call agent GK, GK1, GK2 Gatekeeper

Claims (6)

Control signals collected from multiple capture devices for VoIP services deployed on an IP network consisting of servers and routers such as multiple physical call agents (Gate Agents) and gate keepers (Gate Keepers) By processing communication data, a call process across a plurality of communication sections is generated as one call processing sequence, and a control sequence test method for specifying a failure occurrence location,
(1) A step of separating each communication data for each call processing by performing allocation for each Call ID for all communication data that is control signals collected from a plurality of capture devices,
(2) Next, a step of extracting communications for each of the plurality of call processes, which is presumed to be the same call process, by executing a search based on the incoming call number information and the power generation number information for communication data for each call process. ,
(3) a step of confirming normality by comparing the extracted communication data for each of the plurality of call processes with normal data stored in a database;
(4) a step of further identifying the section in which the data is captured from the source IP address and destination IP address of the communication data;
(5) a step of referring to a time stamp existing in each data item and determining that the communication data is related to the same call processing if there is no contradiction in the context.
(6) A step of generating all control signal sequences from a transmitting terminal to a receiving terminal across a plurality of spaces by connecting communication data related to the same call processing ,
( 7 ) a step of detecting a device receiving the final signal as a suspicious object of failure when the generated control signal sequence is not normally terminated;
And a control signal sequence test method. A control signal sequence test apparatus for use in the test method according to claim 1 , for a VoIP service deployed on an IP network composed of a plurality of servers and routers such as physical call agents and gatekeepers, A capture device having a function of capturing only a packet related to a control signal of a specified protocol from all passing packets and a logic for converting the captured packet into communication data according to the protocol is connected to each server. In an environment where a packet from a customer terminal device using a VoIP service and a customer terminal that uses VoIP service can be captured, the test device specifies a caller telephone number and an incoming call for identifying the customer terminal device to be tested A machine for entering the destination telephone number, each IP address, and terminal type And an operation unit having a function of displaying a response message, and a test unit connected to the capture device via a data communication network, and the test unit is assigned to each server or customer terminal device. Correspondence table between capture devices connected to the same segment as the address, correspondence table between the telephone number of the customer terminal device and the gatekeeper or call agent in which the terminal device is accommodated, and normal communication data for each protocol A database that stores data, a function that notifies the capture device of the start and end of capture, and a capture device to be tested by making a search request to the held database using a telephone number or IP address as a key A function to identify communication data, a function to acquire communication data captured by the capture device, and a capture device A data analysis function that determines the normality of each data item by comparing the communication data acquired from the database with normal data in the database, and logic that extracts the necessary data from the communication data using a specific search key Data search function, connection function to connect multiple communication data by ascertaining the context by referring to source information, destination information and time information of multiple communication data obtained as a result of search, and result of connection A control signal sequence test apparatus comprising: a suspicious object detection function that targets an apparatus that receives a final signal when a sequence is not normally completed. A capture device used in the test method according to claim 1 , wherein a function for capturing only a packet related to a control signal of a designated protocol among all passing packets, and communication data corresponding to the protocol for the captured packet. A capture device comprising logic for converting to a. A computer program for realizing the control signal sequence test apparatus according to claim 2 , wherein the computer program includes:
A function included in the computer included in the operation terminal of the test apparatus is a function for inputting a source telephone number, a destination telephone number, an IP address and a terminal type for identifying a customer terminal apparatus to be tested, and a response message. Realize the function to display,
Correspondence table between the IP address allocated to each server or customer terminal device and the capture device connected on the same segment to the computer included in the test unit of the test device, the telephone number of the customer terminal device and the terminal The correspondence table with the gatekeeper and call agent that accommodates the device, the function of storing normal data of communication data for each protocol in the database, and the function of notifying the capture device of the start and end of capture A function for specifying a capture device to be tested by making a search request to the database using a telephone number or IP address as a key, a function for acquiring communication data captured by the capture device, and a communication acquired from the capture device Data terms by comparing the data with normal data in the database Data analysis function to determine the normality of each, data search function that is the logic to extract the necessary data from the communication data using a specific search key, and source information of multiple communication data obtained as a result of the search And a destination function and a time information by referring to the time information, a connection function for connecting a plurality of communication data, and a device that receives a final signal when the connected result sequence is not normally completed. A computer program for realizing a suspicious object detection function as a suspicious object. A computer program for realizing the capture device according to claim 3 , wherein the computer program includes:
A computer included in the capture device realizes a function of capturing only a packet related to a control signal of a specified protocol from all passing packets and a logical function of converting the captured packet into communication data according to the protocol. A computer program characterized by the above. A computer-readable recording medium on which the computer program according to claim 4 or 5 is recorded.

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