JP6212871B2 - Communication monitoring system, communication monitoring device, communication monitoring program, and communication terminal - Google Patents

Description

  The present invention relates to a communication monitoring system, a communication monitoring device, a communication monitoring program, and a communication terminal. For example, in communication performed using the TCP / IP protocol, a communication monitoring system, a communication monitoring device, and a communication monitoring that monitor network quality. It can be applied to programs and communication terminals.

  In communication performed using the TCP / IP protocol, there is a technique described in Patent Document 1 as a technique related to a communication performance measuring apparatus that measures network performance.

  The technology described in Patent Literature 1 includes a communication performance measuring device capable of communicating with a branch node existing on a communication path between a client and a server. The communication performance measuring apparatus estimates a delay time with respect to a destination such as a client access point or a branch node, transmits an HTTP GET request to the server, and receives a data packet (content data) from the server. Is recorded, and the delay time with the server is measured. Then, based on the estimated delay time between the destination and the delay time between the server, the communication performance measuring device measures the communication performance of the communication path between the client and the server.

  The technology described in Patent Document 1 described above is based on the transmission time of the HTTP GET request to the server and the reception time of the data packet from the server, thereby measuring the delay time between the server and the client. The server performance at that time is grasped using the estimated delay time.

JP 2003-8648 A

  However, the technology described in Patent Document 1 is such that the communication performance measuring device estimates the network performance only from the response time from the server. Therefore, the server performance at the time of measurement can be grasped. However, the communication performance measuring device is connected to the branch node, and does not measure the communication quality actually experienced by the browsing user. The operating status of the server varies depending on the time period when the user performs browsing, or varies depending on days such as weekdays and holidays. Furthermore, the delay time may increase or decrease depending on the processing state of the nodes on the network, and the communication quality experienced by the user cannot be actually measured.

  Therefore, based on the communication status of packets sent and received between the client and the server that actually perform browsing, the operating status of the server can be grasped, and the processing status of the nodes on the network is higher than normal. There is a need for a communication monitoring system, a communication monitoring device, a communication monitoring program, and a communication terminal that can identify a deteriorated location.

In order to solve such a problem, the first aspect of the present invention is a communication monitoring system that monitors the operating status and communication quality of a server when a terminal having a browsing function browses content provided by the server. Control for the terminal to transmit a request signal to the content request destination of the server and measure the communication quality of the route between the terminal and the network device existing on the route between the terminal and the server A means for transmitting a signal to the network device , and if there are a plurality of network devices on the route, the control signal reaching the network device closest to the terminal or the server closest to the terminal on the route A means for transmitting the control signal reaching the network device in a predetermined order. The previous identification information, and transmitting means is a means to said server, and reception result of the response signal to the request signal, test execution means and a receiving means for obtaining a measurement result of the communication quality of the route based on the control signal Collecting the result of receiving the response signal and the measurement result of the communication quality of the route from the test execution means Refers to the data storage means to be stored, the data storage means, and the server operating status information based on the reception result of the response signal from the server and between the terminal and the network device based on the measurement result of the communication quality of the route And a statistical processing means for obtaining statistical information on the communication quality of the route.

According to a second aspect of the present invention, there is provided a communication monitoring apparatus for monitoring the operating status and communication quality of the server when a terminal having a browsing function browses the content provided by the server. And a control signal for measuring the communication quality of the route between the terminal and the network device existing in the route between the terminal and the server is transmitted to the network device. If there are a plurality of network devices on the route, the control signal reaching the network device closest to the terminal on the route or the control signal reaching the network device closest to the server on the route The transmission information is transmitted in a predetermined order, and the identification information of the transmission destination of the control signal is the server. For preparative and testing instruction means for instructing to said terminal, from the terminal, collects the result of receiving the response signal to the request signal, and a measurement result of the communication quality of the route based on the control signals, by giving the date and time information Test result collection / aggregation means for performing aggregation, data accumulation means for accumulating the aggregation results obtained by the test result collection / aggregation means, data storage means, and server operation status information based on the response signal reception result from the server And a statistical processing means for obtaining statistical information of the communication quality of the route between the terminal and the network device based on the measurement result of the communication quality of the route.

A third aspect of the present invention is a communication monitoring program for monitoring the operating status of a server and the communication quality of a network when a terminal having a browsing function browses content provided by the server. A control signal for transmitting a request signal to the content request destination and measuring the communication quality of the route between the terminal and the network device existing on the route between the terminal and the server is sent to the network device. If there are a plurality of network devices in the route, the control signal reaching the network device closest to the terminal or the network device closest to the server in the route The control signal is transmitted in a predetermined order, and the transmission destination of the control signal Collecting identification information, about to the server, a test instruction means for instructing to said terminal, from the terminal, the reception result of the response signal to the request signal, and a measurement result of the communication quality of the route based on the control signal The test result collection and aggregation means for adding the date and time information, the data accumulation means for accumulating the aggregation results by the test result collection and aggregation means, and the data accumulation means are referred to. A communication monitoring program that functions as a statistical processing unit that obtains statistical information of communication quality of a route between a terminal and a network device based on operational status information of a server and a measurement result of communication quality of the route It is.

The fourth aspect of the present invention is a communication terminal, which transmits a request signal to a request destination of content of a server, and between the communication terminal and the network device existing on the path between the communication terminal and the server. a means for transmitting a control signal for measuring the communication quality of path to the network device, if there are a plurality of network devices in the route, in the route, to the nearest network device to the communication terminal The means for transmitting the control signal to reach the network device closest to the server or the control signal reaching the server in a predetermined order, and the means for using the identification information of the destination of the control signal as the server A transmission means, and a reception means for obtaining a response signal reception result for the request signal and a communication quality measurement result of the route based on the control signal. Test execution means, test result collection and collection means for collecting response signal reception results and path communication quality measurement results from the test execution means, adding date and time information, and totaling by the test result collection and aggregation means A data storage means for storing the results, and the data storage means, and the communication terminal and the network based on the operation status information of the server based on the reception result of the response signal from the server and the measurement result of the communication quality of the route A communication terminal comprising statistical processing means for obtaining statistical information of communication quality of a route to and from the apparatus.

  According to the present invention, it is possible to grasp the operating status of the server based on the communication status of packets actually exchanged between the client and the server, and further, the processing status of the nodes on the network is more than normal. Also, it is possible to identify a deteriorated part.

It is a block diagram which shows the connection relation of the communication monitoring apparatus and client terminal which concern on embodiment, and the internal structure of a communication monitoring apparatus and a client terminal. It is a lineblock diagram showing the whole communication monitoring system composition concerning an embodiment. It is a sequence diagram which shows operation | movement of the communication monitoring process of embodiment. It is a sequence diagram which shows the service test by HTTP to the HTTP server by the client terminal of embodiment, and the test method by ICMP. It is explanatory drawing explaining the operation | movement and determination method of the HTTP service test with respect to the HTTP server by the client terminal of embodiment. It is explanatory drawing explaining the content of the ICMP test result of embodiment. An example of the graphic display screen by the GUI control part of embodiment is shown.

(A) Main Embodiments Hereinafter, embodiments of a communication monitoring system, a communication monitoring device, a communication monitoring program, and a communication terminal according to the present invention will be described in detail with reference to the drawings.

  The embodiment exemplifies a case where the present invention is applied to a system for monitoring communication quality in a network using a TCP / IP protocol as a communication protocol.

(A-1) Configuration of Embodiment (A-1-1) Overall Configuration of Communication Monitoring System FIG. 2 is a configuration diagram showing the overall configuration of the communication monitoring system according to the embodiment. In FIG. 2, the communication monitoring system 10 according to the embodiment includes a communication monitoring apparatus 1, a client terminal 2, one or a plurality of nodes 3 (3-1 and 3-2), HTTP servers 4-1 to 4 -N (N Is a positive integer) and has a network 7.

  The network 7 is a communication network corresponding to the Internet, for example.

  The HTTP server 4-n is a server that can be connected to the network 7, and corresponds to, for example, a Web server that provides content (Web page) requested according to HTTP. When the HTTP server 4-n acquires the HTTP request from the client terminal 2, the HTTP server 4-n returns an HTTP response corresponding to the request content to the client terminal 2.

  For example, when the HTTP server 4-n receives an HTTP GET request regarding acquisition of content (Web page) of a certain URL from the client terminal 2, it returns an HTTP response including data regarding the corresponding Web page to the client terminal 2. For example, a Web page provided by the HTTP server 4-n may include content such as an image, and a request destination server for the content may be another HTTP server. At this time, the client terminal 2 acquires an HTTP response by transmitting an HTTP GET request to another HTTP server on the basis of the URL described in the Web page in order to acquire content constituting the Web page. In this way, the client terminal 2 may send an HTTP GET request multiple times in order to acquire the content of a specific Web page, and may also send HTTP to different HTTP servers 4-n as necessary. A GET request may be transmitted.

  When the client terminal 2 acquires content by HTTP, the communication monitoring device 1 monitors the operating status of the HTTP server 4-n that is the content distribution source, and between the client terminal 2 and the HTTP server 4-n. The status of each node on the route is monitored.

  For example, the communication monitoring apparatus 1 determines whether the client terminal 2 that transmitted the HTTP GET request has received an HTTP response from the HTTP server 4-n, the content of the HTTP response received by the client terminal 2, the client terminal 2 The response time (response time) from the transmission of the HTTP GET request to the reception of the HTTP response is statistically processed for each time zone, day of the week, date, and the like. Thereby, it is possible to grasp the statistical operating status of the HTTP server 4-n when the client terminal 2 browses the content. Further, the communication monitoring apparatus 1 compares the statistical result of the HTTP server 4-n with the current request result to the HTTP server 4-n, and compares the statistical result with the current operation status of the HTTP server 4-n ( Performance).

  Further, for example, the communication monitoring apparatus 1 transmits a control packet for testing the communication quality on the path between the client terminal 2 and the HTTP server 4-n at the same time as the HTTP GET request of the client terminal 2, and the path of the path Information and round trip time (RTT value) are measured. That is, the control packet for testing the communication quality on the route is sent to the HTTP GET request packet transmitted by the client terminal 2.

  Here, as will be described later, the communication monitoring apparatus 1 uses, for example, an ICMP traceroute command or the like as a control packet to be sent to the HTTP GET request. As a result, the communication monitoring apparatus 1 can acquire the route information and the round trip time (RTT value) on the route from the client terminal 2 to the target host (HTTP server 4-n), and further the route information and the round trip. Statistical processing of the delay time (RTT value) is performed for each time zone, day of the week, date, etc. Thereby, the communication quality on the path | route between the client terminal 2 which actually performs browsing, and HTTP server 4-n can be grasped | ascertained.

  Further, since the communication monitoring apparatus 1 can recognize the processing state of the node 3 on the route, for example, by comparing the statistical RTT value for each hop obtained statistically with the RTT value for each hop, When the value is larger than the statistical RTT value, there is a possibility that an abnormality has occurred in the node 3 set by the number of hops, that is, the node 3 having a larger processing load than the normal time can be detected.

  The client terminal 2 is a communication terminal having a browsing function. The client terminal 2 acquires (downloads) content by transmitting an HTTP GET request to the HTTP server 4-n using HTTP, and browses the content. As long as the client terminal 2 has a browsing function, various communication terminals can be widely applied. For example, the client terminal 2 includes a personal computer (PC), a mobile terminal (for example, a mobile phone, a so-called smartphone, a tablet terminal, etc.). Thing), a game terminal, an electronic book terminal, etc. are applicable.

  When the client terminal 2 obtains the test instruction from the communication monitoring apparatus 1, it transmits an HTTP request to a predetermined request destination and simultaneously transmits a predetermined control packet for investigating the communication quality of the route to the same request destination. To do. Note that the client terminal 2 may transmit a control packet simultaneously with the transmission of the HTTP request every time an HTTP request is transmitted, even if there is no test instruction from the communication monitoring apparatus 1.

  Here, as a method for testing the communication quality on the route by the client terminal 2, for example, a method using ICMP (Internet Control Message Protocol) or a method using SNMP (Simple Network Management Protocol) can be applied. . This embodiment exemplifies a case where the communication quality of a route with the HTTP server 4-n that is a content request destination is tested using an ICMP traceroute command. The ICMP traceroute command displays the network route information to the target host (in this embodiment, the HTTP server 4-n that is the request destination of the HTTP GET request), the round-trip delay time information between nodes on the network route, and the like. It is to be measured.

  For example, the client terminal 2 transmits an HTTP request to the HTTP server 4-n, and simultaneously transmits a control packet including an ICMP traceroute command with the same HTTP server 4-n as a transmission destination. The client terminal 2 can acquire the reception status of the HTTP response to the HTTP request addressed to the HTTP server 4-n (that is, the presence / absence of the HTTP response) and the response time result, and give the result to the communication monitoring apparatus 1. Furthermore, the client terminal 2 can acquire route information and a round trip time (RTT: Round Trip Time) by an ICMP traceroute command, and provides the route information and the RTT value to the communication monitoring apparatus 1.

  The nodes 3-1 and 3-2 are network devices such as routers constituting an IP network (access network) for accessing the network 7. Although FIG. 2 shows that there are two nodes that relay packets, the number of nodes that relay packets is not limited.

(A-1-2) Internal Configuration of Communication Monitoring Device 1 and Client Terminal 2 FIG. 1 shows the connection relationship between the communication monitoring device 1 and client terminal 2 according to the embodiment, and the internal configuration of the communication monitoring device 1 and client terminal 2. FIG.

In addition, although the case where the communication monitoring apparatus 1 and the client terminal 2 are provided separately is illustrated in FIG. 1, the client terminal 2 may be equipped with the function of the communication monitoring apparatus 1.
As described above, the communication monitoring apparatus 1 causes the HTTP server 4-n to transmit a control packet simultaneously with the HTTP GET request when downloading the content to the client terminal 2, and the HTTP server 4-n is in an operating state. And monitoring the communication quality of the network.

  The communication monitoring apparatus 1 includes, for example, a CPU, a ROM, a RAM, an EEPROM, an input / output interface unit, and the like, similarly to an information processing apparatus such as an existing server. For example, the functional block shown in FIG. 1 is realized by the CPU executing a processing program stored in the ROM.

  1, the communication monitoring apparatus 1 includes a GUI unit 100, a GUI control unit 110, a test unit 120, a connection control unit 130, a test result collection unit 140, a test result totaling unit 150, a statistical data storage unit 160, and a statistical processing unit 170. Have

  The GUI unit 100 is a user interface unit that can perform test settings in response to a user operation under the control of the GUI control unit 110, and can display statistical information and the performance of the HTTP server 4-n and the network. is there. The GUI unit 100 may be a Web-GUI, and may exchange information with the GUI control unit 110 via the Web. Further, the GUI unit 100 may graphically display statistical information, the performance of the HTTP server 4-n, and the network by software processing implemented in a personal computer.

  The GUI control unit 110 is a user interface control unit that exchanges information with the GUI unit 100 that is a user interface unit.

  The GUI control unit 110 gives test setting information to the test unit 120 based on the test setting from the GUI unit 100. Further, the GUI control unit 110 instructs the collection period to the test result collection unit 140 based on the test setting from the GUI unit.

  Here, the test setting information given to the test unit 120 by the GUI control unit 110 includes information related to content acquisition by the client terminal 2, detailed information related to the execution of the test of the client terminal 2, and the like.

  The information related to content acquisition is information related to a content request destination. The information related to the content request destination can be, for example, the content URL, the IP address of the HTTP server 4-n, the host name, or the like.

  Detailed information regarding the implementation of the test of the client terminal 2 includes a test cycle of the number of packets of the HTTP request transmitted by the client terminal 2.

  Further, the GUI control unit 110 issues a collection cycle instruction to the test result collection unit 140 based on the collection cycle included in the test setting information from the GUI unit 100. The collection cycle is information regarding the collection cycle in which the test result collection unit 140 acquires the test result from the client terminal 2.

  Here, the test cycle performed by the client terminal 2 and the test result collection cycle can be appropriately set according to the test accuracy. The collection period of test results can be set as, for example, about several tens of seconds. The test cycle performed by the client terminal 2 is, for example, when the operation status and network quality of the HTTP server 4-n are grasped with an accuracy of about several milliseconds, the client terminal 2 sends an HTTP GET request at about 100 packets / second. Set to send. Further, when grasping with higher accuracy (for example, 1 msec), the client terminal 2 is set to transmit an HTTP GET request at a test cycle of about 1000 packets / second.

  Further, the GUI control unit 110 gives the statistical result from the statistical processing unit 170 to the GUI unit 100. The GUI control unit 110 displays, for example, the IP network in which the node 3 exists, the HTTP server 4-n group, and the like in a map format, the operation status of the HTTP server 4-n for each time zone, day of the week, etc. The processing status or the like may be displayed.

  The test unit 120 receives test setting information from the GUI control unit 110 and gives a test instruction to the client terminal 2 via the connection control unit 130.

  The connection control unit 130 is an interface unit with the client terminal 2. When receiving a test instruction from the test unit 120, the connection control unit 130 instructs the client terminal 2 to perform a test command. That is, the connection control unit 130 instructs the client terminal 2 to establish a connection with a predetermined HTTP server 4-n and instructs a test using a control packet.

  Here, the connection control unit 130 may give the client terminal 2 a command for instructing the test by using, for example, telnet or CLI (command line interface). Further, the command related to the test execution includes, for example, a connection destination (for example, the IP address, URL, etc. of the HTTP server 4-n).

  When the connection control unit 130 receives a collection instruction from the test result collection unit 140, the connection control unit 130 instructs the client terminal 2 to collect a test result. When the connection control unit 130 acquires the test result from the client terminal 2, the connection control unit 130 gives the acquired test result to the test collection unit 140.

  When the test result collection unit 140 receives a collection cycle instruction from the GUI control unit 110, the test result collection unit 140 instructs the connection control unit 130 to collect test results. The test result collection unit 140 receives a test result from the client terminal 2 via the connection control unit 130 and gives the received test result to the test result collection unit 150.

  The test result totaling unit 150 associates the test results collected by the test result collecting unit 140 with date and time information (for example, information such as year, month, day of the week, and time) and performs a totaling process using the test results. It is.

  The test result totaling unit 150 temporarily accumulates the test results with the date / time information in the statistical data storage unit 160, or gives the current totals obtained from the test result collection unit 140 to the statistical processing unit 170. To do.

  The statistical data accumulation unit 160 accumulates the aggregation results obtained by the aggregation processing by the test result aggregation unit 150 and the statistical results obtained by the statistical processing by the statistical processing unit 170.

  The statistical processing unit 170 performs predetermined statistical processing using the totaling results from the test result totaling unit 150 and the totaling results stored in the data storage unit 160. Further, the statistical processing unit 170 gives the statistical result of the statistical processing to the GUI control unit 110 or stores it in the statistical data storage unit 160.

  The statistical processing unit 170 may perform statistical processing using data stored in the statistical data storage unit 160, and the statistical processing unit 170 may display the statistical result on the GUI unit 100 via the GUI control unit 110.

  In addition, regarding the HTTP GET request to the HTTP server 4-n of the client terminal 2 this time, the statistical processing unit 170 reads the corresponding statistical data from the statistical data storage unit 160, and the statistical processing unit 170 relates to the current HTTP GET request. Information obtained by comparing the delay information with the delay information based on the statistical data may be displayed on the GUI unit 100.

  For example, statistical processing using the HTTP report result based on the HTTP response accumulated in the statistical data storage unit 160 over several weeks, the network communication quality result based on the ICMP packet transmitted simultaneously with the HTTP GET request, or the like. The unit 170 obtains the operation status for each time zone of the HTTP server 4-n and the performance for each network time zone. For example, the statistical processing unit 170 includes, as statistical data, the operation status of the HTTP server such as by month, week, day of the week, and time zone (statistical information from 12:00 AM to 12:00 PM), network communication quality, and the like. Performance and the like can be obtained.

  In FIG. 1, the statistical processing unit 170 includes a determination unit 171, an HTTP report processing unit 172, and an ICMP test result processing unit 173.

  The HTTP report processing unit 172 receives an HTTP response of an HTTP GET request transmitted from the client terminal 2 to the HTTP server 4-n based on data stored in the statistical data storage unit 160 or data from the test result totaling unit 150. Statistical processing is performed on the result of the presence or absence of the above. In other words, the HTTP report processing unit 172 collects HTTP response reports for HTTP GET requests transmitted by the client terminal 2 that actually performs browsing.

  For example, the HTTP report processing unit 172 determines whether or not an HTTP response has been received in response to an HTTP GET request transmitted from the client terminal 2 to the request destination in order to grasp the operating status of the HTTP server 4-n. , The contents of the received HTTP response, the response time of the HTTP response (the time from the transmission time of the HTTP GET request to the reception time of the HTTP response in the client terminal 2) for each time zone, day of the week, date, etc. Aggregation processing is performed for each HTTP server 4-n.

  Thereby, for example, when the client terminal 2 that performs browsing transmits an HTTP GET request in a certain time zone of a certain date, it is possible to confirm whether or not an HTTP response has been returned from the HTTP server 4-n. . The HTTP report processing unit 172 may obtain a result that an HTTP response is received in a certain time zone or the like in a predetermined statistical calculation method or a predetermined stochastic calculation method.

  In addition, when there is an HTTP response from the HTTP server 4-n, the HTTP report processing unit 172 confirms the content of the received HTTP response and can establish a connection to the port of the HTTP server 4-n. You can also check if there was an error. For example, the HTTP report processing unit 172 may statistically or probabilistically determine the connection error rate or the like for each time period based on the content of the HTTP response from the request destination of 100 million boats.

  Further, the HTTP report processing unit 172 obtains the average response time of the HTTP response from the HTTP server 4-n for each time zone, day of the week, date, and the like. Thereby, since the response time for every time slot | zone etc. of HTTP server 4-n can be known, the operating condition of HTTP server 4-n can be grasped | ascertained for every time slot | zone.

  The ICMP test result processing unit 173 displays the test result by ICMP from the client terminal 2 to the HTTP server 4-n based on the data of the statistical data storage unit 160 and the data of the test result totaling unit 150, time zone, day of the week, date, etc. Statistical processing is performed every time. That is, the ICMP test result processing unit 173 obtains a statistical result of the ICMP test result obtained in the control packet transmitted from the client terminal 2 at the same time as the HTTP GET request.

  Here, the ICMP test result processing unit 173 determines the number of hops of the ICMP packet from the client terminal 2 to the transmission destination host (HTTP server 4-n) (that is, the number of hops in the outgoing path of the ICMP packet). The number of estimated hops up to (that is, the estimated number of hops in the return path of the ICMP packet), the RTT value between the nodes, the IP address of the node 3 installed at each hop, the reachability of the host, and the like are obtained.

  The determination unit 171 determines the RTT value between the nodes 3 related to the transmission of the current HTTP GET request by the client terminal 2 and the statistical RTT value between the corresponding nodes 3 stored in the statistical data storage unit 160. In comparison, based on the difference between the current RTT value and the corresponding statistical RTT value, it is determined how far the difference is, and whether or not the state is different from the normal time is determined.

  For example, when the difference between the current RTT value between the nodes 3 and the statistical RTT value between the corresponding nodes 3 exceeds a threshold, the determination unit 171 determines the position between the nodes 3 from the normal time. Is also specified as a position with a large delay. At this time, the determination unit 171 may display the IP address of the node 3 in the section with a larger delay than normal or display the position of the node 3 displayed in the map format in the GUI. .

  As shown in FIG. 1, the client terminal 2 includes a browsing unit 31, a test execution unit 32, and a test result transfer unit 33. The test execution unit 32 includes an HTTP processing unit 321 and a control packet communication unit 322.

  The HTTP processing unit 321 transmits an HTTP GET request to a request destination instructed from the communication monitoring apparatus 1. Further, the HTTP processing unit 321 acquires information on whether or not an HTTP response has been received from the requested HTTP server 4-n, the content of the HTTP response received from the HTTP server 4-n, and the response time of the HTTP response. This is given to the test result transfer unit 33.

  When receiving a test instruction from the communication monitoring device 1, the control packet communication unit 322 measures the communication quality of the network up to the transmission destination of the HTTP GET request of the HTTP processing unit 321. The control packet communication unit 322 transmits the control packet of the ICMP traceroute command simultaneously with the HTTP GET request, with the destination of the HTTP GET request of the HTTP processing unit 321 as a destination host. The control packet communication unit 322 gives the test result transfer unit 33 the test result such as the network route information and the RTT value obtained by the control packet of the ICMP traceroute command.

  The test result transfer unit 33 temporarily stores the test results obtained by the HTTP processing unit 321 and the control packet communication unit 322. When receiving a collection instruction from the communication monitoring device 1, the test result transfer unit 33 performs communication monitoring on the stored test results. This is given to the device 1.

(A-2) Operation of Embodiment Next, the operation of the communication monitoring process according to this embodiment will be described in detail with reference to the drawings.

  FIG. 3 is a sequence diagram showing the operation of the communication monitoring process of this embodiment.

  First, the GUI control unit 101 acquires test setting information from the GUI unit 100. The GUI control unit 101 issues a test instruction based on the acquired test setting information to the test unit 120 (S101). The test unit 120 issues a test instruction to the connection control unit 130 (S102). In response, the connection control unit 130 issues a test instruction to the client terminal 2 (S103).

  Here, the test setting information includes, for example, the IP address, URL, server name, and the like of the HTTP server 4-n as information on the request destination of the HTTP GET request. The test setting information also specifies a test execution cycle, a collection cycle for collecting test results from the client terminal 2, and the like.

  As a result, the connection control unit 130 can instruct the client terminal 2 to transmit an ICMP control packet simultaneously with transmission of an HTTP GET request to the HTTP server 4-n at every predetermined test execution cycle. it can. Moreover, the communication monitoring apparatus 1 can acquire the test result which the client terminal 2 performed according to the collection period.

  Upon receiving the test instruction, the client terminal 2 transmits an ICMP packet with the request destination of the HTTP GET request as a transmission destination simultaneously with the transmission of the HTTP GET request to the HTTP server 4-n based on the test instruction.

  FIG. 4 is a sequence diagram illustrating an HTTP service test to the HTTP server 4-n by the client terminal 2 according to the embodiment and a test method using ICMP.

  FIG. 5 is an explanatory diagram illustrating the operation and determination method of the HTTP service test for the HTTP server 4-n by the client terminal 2 according to the embodiment. FIG. 5 shows a case where the HTTP service for the HTTP server 4-n establishes a TCP connection to the port 8080 and a TCP connection to the port 80 of the HTTP server 4-n.

  In FIG. 5, for example, when performing HTTP 8080 on the HTTP server 4-n, the HTTP processing unit 321 of the client terminal 2 establishes a TCP connection to the port 8080 of the HTTP server 4-n (S211 in FIG. 4). ).

  After the TCP connection is established, the HTTP processing unit 321 transmits an HTTP GET request to the content URL in order to acquire the content specified by the URL (S212). If the connection to the URL is successful, the HTTP server 4-n returns an HTTP response to the client terminal 2 (S213).

  The HTTP processing unit 321 transmits an HTTP GET request to the HTTP server 4-n, and acquires a test result according to the reception status of the HTTP response from the HTTP server 4-n (S214).

  Here, in the client terminal 2, the HTTP processing unit 321 records the transmission time of the HTTP GET request and the reception time of the HTTP response, and measures the response time to the HTTP server 4-n.

  That is, the HTTP processing unit 321 acquires information indicating whether an HTTP response has been received from the HTTP server 4-n, the content of the HTTP response, and the response time with respect to the HTTP server 4-n as the test result of the HTTP service.

  Note that an HTTP response may not be returned for some reason. Various methods can be applied to determine whether there is an HTTP response. For example, the HTTP processing unit 321 may determine that no HTTP response has been received when a response to the HTTP response has passed a timeout time. Further, for example, when no HTTP response is returned even after a predetermined time has elapsed, the HTTP processing unit 321 retries transmission of an HTTP GET request, and when there is no HTTP response even after a predetermined number of retries, the HTTP processing unit 321. May determine that no HTTP response has been received.

  Next, an ICMP test by the client terminal 2 of the embodiment will be described. As described above, the control packet communication unit 322 transmits an ICMP packet (control packet) destined for the HTTP server 4-n simultaneously with the transmission of the HTTP GET request to the HTTP server 4-n (FIG. 4). S221).

  Here, the ICMP packet is transmitted simultaneously with the transmission of the HTTP GET request. “Simultaneously” is intended to be the same period (same timing) as the transmission of the HTTP request packet. That is, the operating status of the HTTP server 4-n and the communication quality of the network vary depending on weekdays, holidays, time zones, and the like. In this embodiment, the client terminal 2 transmits ICMP packets at the same time as the transmission timing of the HTTP GET request in order to measure the network quality when the client terminal 2 that performs browsing downloads the content.

  A packet transmitted from the client terminal 2 to the HTTP server 4-n on the Internet is transferred through an optimum route. That is, the node 3 such as a router selects the shortest path, and the packet is transferred through the shortest path. Therefore, the ICMP packet transmitted simultaneously with the HTTP GET request packet can reach the HTTP server 4-n by following the same route as the HTTP GET request packet. Therefore, the quality of the route from the client terminal 2 to the HTTP server 4-n using ICMP can be the quality of the transfer route of the HTTP GET request packet.

  In general, the node 3 on the route performs a routing process according to a predetermined routing table. The control packet communication unit 322 sets a predetermined value TTL (Time To Live) in the ICMP traceroute command and transmits the ICMP packet. When the node 3 on the path receives the ICMP packet, the TTL value is decreased by “1”, and the ICMP packet is transferred to the next transfer destination node 3. The node 3 that has received the ICMP packet with the TTL value “1” decreases the TTL value by 1 (that is, sets the TTL value to “0”), and sends an ICMP message (ICMP Time Exceeded Message) to the client terminal 2 that is the transmission source. )

  For example, in FIG. 4, the control packet communication unit 322 transmits an ICMP packet having a TTL value “1” with the HTTP server 4-n as the transmission destination simultaneously with the transmission of the HTTP GET request. In this case, since the TTL value is “1”, the node 3-1 that is the first transfer destination from the client terminal 2 sets the TTL value to “0” and returns an ICMP message to the client terminal 2. Thereby, the client terminal 2 can recognize that the node of the first hop is the node 3-1, and can measure the RTT value of the ICMP packet.

  Next, the control packet communication unit 322 transmits an ICMP packet having a TTL value “2”. In this case, the node 3-2 that is the next transfer destination of the node 3-1 returns an ICMP message to the client terminal 2 with the TTL value set to “0”. Thereby, the control packet communication unit 322 can recognize that the second hop node is the node 3-2 and can measure the RTT value of the ICMP packet.

  As described above, the control packet communication unit 322 increases the TTL value, thereby measuring the route information to the HTTP server 4-n and the RTT value for the traceroute command.

  When the ICMP packet reaches the HTTP server 4-n that is the target host of the traceroute command, the HTTP server 4-n returns an ICMP response packet for the traceroute command from the client terminal 2 to the client terminal 2 (S222).

  At this time, the HTTP server 4-n sets a predetermined TTL value in the ICMP response packet and returns it to the client terminal 2. As the TTL value in the ICMP response packet, for example, a value such as 64, 128, or 255 is set.

  When the ICMP response packet addressed to the client terminal 2 is received from the HTTP server 4-n by the node 3 on the route, the node 3 decreases the TTL value by “1” and sends the ICMP response packet to the next transfer destination node. Forward. That is, each node 3 on the path subtracts the TTL value of the ICMP response packet every time it is transferred.

  When an ICMP response packet for the traceroute command from the HTTP server 4-n is given to the client terminal 2, the control packet communication unit 322 sends the client terminal 2 from the HTTP server 4-n to the client terminal based on the TTL value in the received ICMP response packet. The number of hops (TTL Returned) up to 2 (return route) is obtained.

  Here, the following method is applied as a method for obtaining the number of hops (TTL Returned) from the HTTP server 4-n to the client terminal 2 (return route). For example, it is assumed that the set TTL value set in the ICMP response packet is “255” and the reception time TTL value in the ICMP response packet received by the control packet communication unit 322 is “242”. In this case, the number of hops in the return path of the ICMP response packet from the HTTP server 4-n to the client terminal 2 is 13 hops (= 255-242) by subtracting the TTL value at the time of reception from the set TTL value.

  In the client terminal 2, the HTTP processing unit 321 gives the HTTP service test result to the test result transfer unit 33, and the control packet communication unit 322 gives the ICMP test result to the test result transfer unit 33.

  Next, in FIG. 3, the GUI control unit 101 acquires a collection cycle instruction included in the test setting information from the GUI unit 100 (S <b> 104). The GUI control unit 101 gives the acquired collection cycle information to the test result collection unit 140.

  The test result collection unit 140 manages the collection cycle. The test result collection unit 140 issues a collection instruction to the connection control unit 130 at the collection cycle (S105). In response to this, the connection control unit 130 performs the process on the client terminal 2 (S106).

  When the client terminal 2 receives the collection instruction, the test result transfer unit 33 gives the HTTP service test result and the ICMP test result to the connection control unit 107.

  In the communication monitoring apparatus 1, when the connection control unit 130 acquires the HTTP service test result and the ICMP test result from the client terminal 2 (S107), the test result is sent to the test result collection unit 140 via the connection control unit 130. (S108).

  Further, the test result collection unit 140 gives the collected test results to the test result totaling unit 150. The test result totaling unit 150 assigns test execution date / time information to the test results acquired from the test result collecting unit 140 and accumulates the total results in the data storage unit 160 (S109).

  For example, the test result totaling unit 150 adds date and time information (for example, date, day of the week, time, etc.) of the test to the HTTP service test result and the ICMP test result. In addition, the test result totaling unit 150 assigns request destination information of the HTTP GET request relating to the test setting to the HTTP service test result and the ICMP test result. This request destination information can be, for example, the IP address, URL, host name, etc. of the HTTP server 4-n.

  Next, in the communication monitoring apparatus 1, the statistical processing unit 170 performs predetermined statistical processing using the aggregation results accumulated in the statistical data accumulation unit 160 and the aggregation results accumulated by the test result aggregation unit 150 (S110). ).

  For example, the statistical processing unit 170 may obtain measurement results such as, for example, monthly, weekly, day of the week, or time zone (statistical information from 12:00 AM to 12:00 PM) as statistical information. good.

  Then, the statistical processing unit 170 stores the statistical data subjected to the statistical processing in the statistical data storage unit 160 (S111).

  First, a method of determining an HTTP service test result for the HTTP server 4-n by the statistical processing unit 170 will be described with reference to FIG.

  Based on the HTTP service test result for the HTTP server 4-n, the statistical processing unit 170 aggregates the response reports by month, week, day of the week, and time zone.

  For example, in FIG. 5, when the HTTP processing unit 321 receives an HTTP response from the HTTP server 4-n, the statistical processing unit 170 establishes a TCP connection to the port of the HTTP server 4-n, and the HTTP server 4-n. It is assumed that “RUNNING” indicates that an HTTP GET request can be normally requested to n.

  When the HTTP response is not received, the statistical processing unit 170 indicates that the TCP connection to the port of the HTTP server 4-n is not normally established and some abnormality or processing delay occurs in the HTTP server 4-n. “NOT OPEN”.

  When there is an HTTP response and the connection to the content URL is normally performed, the statistical processing unit 170 sets “OPEN” indicating no error.

  When an HTTP 404 response indicating an error is returned, the statistical processing unit 170 may accumulate that an error has occurred in the HTTP server 4-n.

  The statistical processing unit 170 counts the presence / absence of responses to the HTTP server 4-n by month, week, day of the week, and time zone. For example, the statistical processing unit 170 counts the number of determinations of “RUNNING”, “NOT OPEN”, and “OPEN” for each month, week, day of the week, and time zone.

  For example, when the number of “NOT OPEN” exceeds the threshold, the statistical processing unit 170 determines that the processing state of the HTTP server 4-n is not good, and when the number of “NOT OPEN” is equal to or less than the threshold, the HTTP server 4-n It is determined that the processing status of 4-n is good.

  Further, for example, the statistical processing unit 170 obtains a ratio (determination frequency) based on the number of determinations of “RUNNING”, “NOT OPEN”, and “OPEN” in a certain time zone or period. Then, the statistical processing unit 170 compares the determination frequency of “RUNNING”, “NOT OPEN”, and “OPEN” with a preset threshold value, and the operation status of the HTTP server 4-n is good based on the comparison result. It may be determined whether it is bad or bad.

  Further, for example, the statistical processing unit 170 compares the average value of the HTTP response time with respect to the HTTP server 4-n for each month, week, day of the week, and time zone and a threshold value, and based on the comparison result, the HTTP server 4 It may be determined whether the operating status of -n is good or bad.

  Next, statistical processing of the ICMP test result by the statistical processing unit 170 will be described with reference to FIG. FIG. 6 is an explanatory diagram for explaining the contents of the ICMP test. In FIG. 6, ICMP test contents include “HOP number”, “TTL returned”, “RTT”, “IP address reached”, and “Host reached”.

  “HOP count” indicates the hop count from the client terminal 2.

  “TTL returned” is a TTL value in the ICMP response to the traceroute command from the client terminal 2. That is, “TTL returned” is the number of hops on the return route to the client terminal 2.

  “RTT” is a delay time from when the client terminal 2 transmits an ICMP packet until it receives an ICMP response packet.

  “IP address reached” indicates the IP address of the node installed in each HOP number.

  “Host reached” indicates the result of address resolution of the host (HTTP server 4-n).

  Based on the ICMP test result shown in FIG. 6, the statistical processing unit 170 calculates the average value of “HOP number”, “TTL returned (number of hops of return route)”, and “RTT” for the HTTP server 4-n. (Statistics) is calculated by month, week, day of the week, time zone, etc. The statistical processing unit 170 stores statistical values of “HOP number”, “TTL returned (number of hops of return route)”, and “RTT” values for each month, week, day of the week, time zone, etc. It accumulates in 160.

  Here, for example, when a statistical data display request is acquired from the GUI unit 100, the statistical processing unit 170 may display the statistical data on the GUI unit 100. For example, when the client terminal 2 downloads content from the HTTP server 4-n, the statistical processing unit 170 transmits an ICMP packet simultaneously with the transmission of the HTTP GET request, and the test result and statistical data of the current ICMP test are transmitted. These comparison results may be displayed on the GUI unit 100.

  Note that the statistical data display request by the GUI unit 100 may specify, for example, monthly, weekly, weekday, or time zone.

  When the client terminal 2 acquires content from the HTTP server 4-n, the statistical processing unit 170 reads out statistical data corresponding to the transmission date and time information of the HTTP GET request from the statistical data storage unit 170, and the comparison result May be displayed on the GUI unit 100.

  FIG. 7 shows an example of a graphic display screen by the GUI control unit 110. For example, the GUI control unit 110 displays a display screen in a map format between the client terminal 2, a network network (for example, an IP network) in which the node 3 is connected to the Internet, and an HTTP server group on the Internet. To display.

  The GUI control unit 110 indicates whether the operation status of the HTTP server 4-n is good or bad based on the statistical data of the HTTP service test result. For example, in the case of FIG. 7, “OK” is displayed when the operation status of the HTTP server 4-n is good, and “NG” is displayed when the operation status of the HTTP server 4-n is bad.

  Further, the GUI control unit 110 indicates whether the communication quality of the network is good or bad based on the statistical data of the ICMP test result. For example, in the case of FIG. 7, “OK” is displayed when the network communication quality is good, and “NG” is displayed when the network communication quality is bad.

  Whether the communication quality of the network is good or bad is determined by the statistical processing unit 170 comparing the statistical data for each month, week, day of the week, and time, according to the comparison result. It may be determined whether the state is good or bad.

  Further, when the client terminal 2 transmits an HTTP GET request to the HTTP server 4-n in order to acquire content, the statistical processing unit 170 includes statistical data (for example, the transmission date / time information of the HTTP GET request this time) , Monthly, weekly, day of the week, and corresponding statistical data by time period). Then, the statistical processing unit 170 compares the ICMP test result accompanying transmission of the current HTTP GET request with the corresponding statistical data.

  For example, when the RTT value between the nodes on the current route is larger than the RTT value between the nodes of the statistical data, the communication quality of the network is poor, and the RTT value on the current route is the statistical data If the RTT value or less, the network communication quality is good.

  For example, the statistical processing unit 170 obtains a difference between the RTT value between the nodes on the current route and the RTT value between the nodes in the statistical data. Then, the statistical processing unit 170 compares the difference value with the threshold value, and determines how much the current RTT value of each node is different from the RTT value between the nodes of the statistical data. That is, the statistical processing unit 170 may make the network quality good when the difference value exceeds the threshold value, or may make the network quality poor when the difference value is less than or equal to the threshold value.

  Here, when the communication quality of the network is poor, the statistical processing unit 170 compares the current ICMP test result with the statistical data, and determines at which position on the route the delay time is large. That is, the statistical processing unit 170 compares the RTT value of each hop of this time with the RTT value of each hop of statistical data, and finds a location where the RTT value of this hop is larger than the RTT value of the hop of statistical data. Identify.

  Specifically, the statistical processing unit 170 identifies the node 3 installed in the hop that is larger than the RTT value of the hop of the statistical data. Then, the statistical processing unit 170 reads the IP address of the node 3 installed at the hop from the statistical data storage unit 160. As a result, it is possible to identify a degraded part causing a delay on the route. Note that the statistical processing unit 170 may display the identified node 3 of the deteriorated part on the graphic screen displayed on the GUI unit 100.

(A-3) Effects of the Embodiment As described above, according to this embodiment, the communication monitoring apparatus can grasp the operating status of the server and specify the degradation location according to the operating status.

  Further, according to this embodiment, the communication monitoring apparatus statistically holds the delay from the RTT value at each node on the route, and how far the measured value deviates from the average value of the statistically held data. It becomes possible to grasp a state different from the normal state by grasping whether or not it is doing.

(B) Other Embodiments Although various modified embodiments have been described in the above-described embodiments, the present invention can be widely applied to the following modified embodiments.

  As described in the above-described embodiment, the client terminal that performs browsing may include the function of the communication monitoring device described above. As a result, the client terminal itself that requests content from the HTTP server has an operation status that changes with time of the HTTP server, and a communication quality on the communication path of the network that changes with time according to the operation status of the HTTP server. Can understand the situation.

  In the above-described embodiment, the case where the communication monitoring apparatus transmits a control packet (ICMP packet) for testing the communication quality of the network simultaneously with the transmission of the HTTP GET request is exemplified. However, here, it is only necessary to test the communication quality of the network following the transmission of an HTTP request from a client terminal that acquires content such as a Web page. Therefore, for example, the packet format of the HTTP request may be expanded and an ICMP traceroute command may be inserted.

  Moreover, although the case where ICMP was used was illustrated in the above-described embodiment, SNMP or extended SNMP may be used.

DESCRIPTION OF SYMBOLS 1 ... Communication monitoring apparatus, 2 ... Klein and terminal, 3-1 and 3-2 ... Node, 4-1 to 4-N ... HTTP server, 7 ... Internet,
DESCRIPTION OF SYMBOLS 100 ... GUI part, 110 ... GUI control part, 120 ... Test part, 130 ... Connection control part, 140 ... Test result collection part, 150 ... Test result totaling part, 160 ... Statistical data storage part, 170 ... Statistical processing part, 172 ... determination unit, 172 ... HTTP report processing unit, 173 ... ICMP test result processing unit,
DESCRIPTION OF SYMBOLS 31 ... Browsing part, 32 ... Test execution part, 321 ... HTTP process part, 322 ... Control packet communication part, 33 ... Test result transfer part.

Claims (6)

When a terminal having a browsing function browses content provided by a server, the communication monitoring system monitors the operating status and communication quality of the server,
The device
Sends a request signal to the request destination of the content of the server, the control signals for measuring the communication quality of the path between the network device present in the path between the terminal and the terminal and the server a means for transmitting to the network device, if a plurality of network devices in the path exists, in the route, to the nearest network device to the control signal to the server reaches the nearest network device to the terminal A means for transmitting the control signals to arrive in a predetermined order, and a means for transmitting the identification information of the destination of the control signals as means for the server ;
A test execution means comprising: a reception means for obtaining a reception result of a response signal to the request signal and a measurement result of a communication quality of a route based on the control signal;
A test result collection and aggregation means for collecting the reception result of the response signal and the measurement result of the communication quality of the route from the test execution means, and adding and collecting date and time information;
Data accumulating means for accumulating the aggregation results by the test result collecting and aggregation means;
Referring to the data storage means, based on the reception result of the response signal from the server, between the operation status information of the server and the measurement result of the communication quality of the route, between the terminal and the network device And a statistical processing means for obtaining statistical information on the communication quality of the route.   The said statistical processing means determines the operating condition information of the said server based on the presence or absence of the said response signal from the said server, and the response delay time of the said response signal. Communication monitoring system. The statistical processing means is
Refer to the communication quality statistical information of the route, compare the communication quality of the route between the terminal and the network device based on the current control signal and the statistical information of the communication quality of the corresponding route, The communication monitoring system according to claim 1 or 2, wherein communication quality of a route between the terminal and the network device is determined based on a comparison result. When a terminal having a browsing function browses content provided by a server, the communication monitoring device monitors the operating status and communication quality of the server,
Sends a request signal to the request destination of the content of the server, the control signals for measuring the communication quality of the path between the network device present in the path between the terminal and the terminal and the server It is to transmit to the network apparatus, if a plurality of network devices in the path exists, in the route, the nearest network device to the control signal to the server reaches the nearest network device to the terminal A test instruction means for instructing the terminal to transmit the control signals that reach the control signal in a predetermined order, and that the identification information of the transmission destination of the control signals is the server ,
From the terminal, collecting the reception result of the response signal to the request signal, the measurement result of the communication quality of the path based on the control signal, and adding the date and time information, the test result collection and aggregation means for aggregation
Data accumulating means for accumulating the aggregation results by the test result collecting and aggregation means;
Referring to the data storage means, based on the reception result of the response signal from the server, between the operation status information of the server and the measurement result of the communication quality of the route, between the terminal and the network device And a statistical processing means for obtaining statistical information on the communication quality of the route. When a terminal having a browsing function browses content provided by a server, the communication monitoring program monitors the operating status of the server and the communication quality of the network,
Computer
Sends a request signal to the request destination of the content of the server, the control signals for measuring the communication quality of the path between the network device present in the path between the terminal and the terminal and the server It is to send to the network device, if a plurality of network devices in the path exists, in the route, to the nearest network device to the control signal to the server reaches the nearest network device to the terminal A test instruction means for instructing the terminal to transmit the control signals to arrive in a predetermined order, and to set the identification information of the transmission destination of the control signals as the server ;
From the terminal, collecting the reception result of the response signal to the request signal, the measurement result of the communication quality of the path based on the control signal, and adding the date and time information, the test result collection and aggregation means for aggregation
Data accumulating means for accumulating the aggregation results by the test result collecting and aggregation means;
Referring to the data storage means, based on the reception result of the response signal from the server, between the operation status information of the server and the measurement result of the communication quality of the route, between the terminal and the network device A communication monitoring program which functions as a statistical processing means for obtaining statistical information of communication quality of a route. A communication terminal,
A control signal for transmitting a request signal to the server content request destination and measuring a communication quality of a path between the communication terminal and the network terminal existing on the path between the communication terminal and the server. If there are a plurality of network devices in the route, the control signal that reaches the network device closest to the communication terminal or the network closest to the server in the route Transmitting means for transmitting the control signals reaching the device in a predetermined order, and for transmitting the identification information of the transmission destination of the control signals as the server ;
A test execution means comprising: a reception means for obtaining a reception result of a response signal to the request signal and a measurement result of a communication quality of a route based on the control signal;
A test result collection and aggregation means for collecting the reception result of the response signal and the measurement result of the communication quality of the route from the test execution means, and adding and collecting date and time information;
Data accumulating means for accumulating the aggregation results by the test result collecting and aggregation means;
Referring to the data storage means, based on the reception result of the response signal from the server, between the communication terminal and the network device based on the operational status information of the server and the measurement result of the communication quality of the route And a statistical processing means for obtaining statistical information on the communication quality of the route.

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