JP4804897B2 - Information distribution method and information system - Google Patents

Description

The present invention relates to an information distribution method and an information system.

  When building software for monitoring the state of a network, since real-time information is important, it has been preferred to build a “client-server” application. On the other hand, since the Web application is freed from complicated work such as application installation and version management on the client side, there is a strong demand for application to a network management system.

By the way, as a system for monitoring the state of the network, as shown in FIGS. 8 (a) and 8 (b), the state of the wireless base stations 1 scattered over a wide range is transmitted by the server 2 (or server 4) via the network. A system that collects and monitors the collected information by the client PC 3 via a network is also conceivable. The configuration shown in FIG. 8A is an event-driven system in which the state of the radio base station 1 is collected by the server 2 via the network, and information is transmitted from the server 2 side to the client PC 3 side by a unique protocol. The configuration shown in FIG. 8B is a pull type system that accesses the server 4 from the client PC 3 side to acquire information.
Japanese Patent Laid-Open No. 11-7405

  However, in the case of a Web application, since the HTTP protocol is used between the client and the server, the pull type shown in FIG. 8B is used instead of the event driven type shown in FIG. That is, it is not good at displaying information in real time. Therefore, as shown in FIG. 8B, it has been replaced by periodically acquiring information from the client PC 2 side using the <META HTTP-EQUIIV = “REFRESH”...> Tag.

  However, because HTTP requests executed in a plurality of windows (browser) are independent due to restrictions of the HTTP protocol, for example, a plurality of Web browsers are started on the client PC 3, and information is received from the server 4 respectively. When acquiring, since each Web browser becomes a completely independent transaction, it is difficult to synchronize information across a plurality of Web browsers (windows). Therefore, it has been difficult to construct an application that displays information in synchronization with a plurality of Web browsers (windows) such as a client server system.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide information distribution capable of realizing multi-window information synchronization in a Web application and distributing an HTTP load. It is to provide a method and an information system.

In order to solve the above-described problems, the following means were adopted.
Information distribution according to the present invention is an information distribution method in a system in which a server and a terminal are connected via a communication network, and indicates a timing at which the information request is made when the server receives an information request from the terminal. Transmitting the received time information to the terminal, the terminal making the information request based on the time information, and when the server receives the information request based on the time information, Including transmitting information to the terminal, and transmitting the time information, wherein the server transmits the same time information to the same terminal, and the terminal includes related information associated with each other. , When displaying separately in multiple windows, by requesting the related information using the same time information, from the server, Serial synchronizing timing for acquiring related information, characterized in that.

Information system according to the present invention is an information system connected through the server and the terminal and the communication network, wherein the server receives an information request from the terminal, the time showing the timing of the information request Time information transmitting means for transmitting information to the terminal, the terminal comprising information request means for making the information request based on the time information, and the server further sending an information request based on the time information. Upon receipt, e Bei means for transmitting information to said information request to the terminal, the time information transmitting means transmits the same time information to the same terminal, related information the terminal, that are associated with each other Is displayed separately in multiple windows, the related information is requested from the server by making a request for the related information using the same time information. Synchronizing timing for acquiring, characterized in that.

According to the present invention, it is possible to realize multi-window information synchronization in a Web application and to distribute the HTTP load.

  Hereinafter, a server distribution information synchronization system according to an embodiment of the present invention will be described with reference to the drawings. Note that the server distribution information synchronization system according to the present embodiment is used for managing wireless base stations of a wireless broadband system.

  FIG. 1 is a block diagram showing a configuration of a server distribution information synchronization system according to an embodiment of the present invention. In the figure, the server distribution information synchronization system includes a radio base station 1, a server 10, an NTP server 12, and client PCs 11-1 to 11-3, which are monitoring target devices. The wireless base stations 1 are scattered and installed in a wide range, and in the illustrated example, there is only one, but there are actually a plurality of wireless base stations 1. The radio base station 1 has alarm states such as Critical, Major, Minor, and Normal. When the wireless base station 1 detects a failure, the wireless base station 1 transmits an SNMP trap to the server 10.

  The server 10 includes an HTTP server 10-1, an SNMP manager 10-2, and a database server 10-3. The SNMP manager 10-2 is connected to a wide range of wireless base stations 1 by the SNMP protocol, and periodically acquires the state of the wireless base station 1 (four states: Critical, Major, Minor, Normal) Obtained by an SNMP trap from the wireless base station 1. The database server (database) 10-3 stores and manages the acquired state of the radio base station 1 as management information in a hierarchical structure. In particular, when a failure occurs, the fact that the corresponding radio base station 1 is in an alarm state is stored in the database.

  The HTTP server 10-1 generates an offset value by a random number every time the client PCs 11-1 to 11-3 log in, and responds to the request from the client PCs 11-1 to 11-3. The state of the wireless base station 1 is described, and an HTML page in which the session ID and the offset value are embedded is generated and transmitted to the client PCs 11-1 to 11-3.

  In the client PCs 11-1 to 11-3, a plurality of Web browsers are activated, and the plurality of Web browsers log in to the server to acquire and display the state of the wireless base station 1 as an HTML page. Further, the Web browsers of the client PCs 11-1 to 11-3 periodically make an HTTP GET request to the server (HTTP server 10-1) 10 according to the offset value. Each client PC 11-1 to 11-3 receives time information from the NTP server 12 and sets the time of its own terminal using the time information. Thereby, the time which each client PC11-1 to 11-3 engraves synchronizes.

  Next, FIG. 2 is a conceptual diagram showing a management state of the radio base station in the server 10. As described above, the server 10 manages the radio base station 1 in a hierarchical structure. In the illustrated example, the route includes “city A”, “city B”, and “city C”, and “base station A”, “base station B”, and “base station C” are subordinate to “city A”. Exists. In the hierarchical structure, the upper layer management object indicates the most serious alarm state among the radio base stations under the management object. In the illustrated example, since “base station A” is “Critical” which is the most serious alarm state, “City A” in the upper layer is also “Critical”.

  As shown in FIG. 3, the Web browser displays these states as a list of managed objects, and visually expresses the alarm state. However, when the upper layer managed object list (city A, city B) and the lower layer managed object list (base station A, base station B) are displayed in separate windows, the prior art As described above, since the HTTP request is transmitted asynchronously, a time difference of information temporarily occurs. In addition, when an HTTP request is issued from all Web browsers at the same timing, there is a concern about an increase in HTTP load.

  Next, the operation of the above-described embodiment will be described. The server distribution information synchronization system according to this embodiment operates as follows.

(1) As shown in FIG. 4, the server 10 generates an offset value using a random number each time a user of a client PC logs in and stores it in a memory area (not shown).

(2) As shown in FIG. 5, the server 10 generates an HTML page including a session ID and an offset value in response to a request from the client PC 11-i (i = 1 to 3), and the client PC 11-i. Send to. The session ID is identification information when the client PC 11-i accesses the server 10. If the same client PC 11-i is used, each Web browser acquires information with the same session ID. .

(3) As shown in FIG. 6, the client PC 11-i generates an HTTP request time from the offset value, and in accordance with the HTTP request time, an HTTP GET for acquiring information from the server 10 in each Web browser window Synchronize the timing.

  As described above, each time the user of the client PC 11-i logs in, the server 10 generates an offset value using a random number, generates an HTML page including the session ID and the offset value, and transmits it to the client PC 11-i. On the client PC 11-i side, an HTTP request time is generated from the offset value, and each Web browser accesses the server 10 in accordance with the HTTP request time, so that each Web browser in the same client PC 111-i The timing of HTTP GET can be synchronized, and the HTTP load by each of the client PCs 11-1 to 11-3 can be distributed by generating an offset value with a random number.

  FIG. 7 is a conceptual diagram showing the timing of HTTP GET when a plurality of Web browsers (two each) are operated in each of the plurality of client PCs 11-1 to 11-3 in the present embodiment. In the figure, each of the client PCs 11-1 to 11-3 operates two Web browsers. The client PC 11-1 accesses the server every 5 seconds to acquire wireless base station management information, and the client PC 11-2 accesses the server every 22 seconds to obtain the state of the wireless base station. The client PC 11-3 accesses the server every 47 seconds and acquires the state of the radio base station. Therefore, the state of the radio base station across a plurality of Web browsers (windows) is synchronized for each client PC (operator). Further, since the offset value is given by a random number, the concentration of access to the server 10 is alleviated, and load distribution is realized.

  According to the above-described embodiment, it is possible to realize information synchronization in a multi-window (Web browser) in a Web application. Further, the HTTP load can be distributed by generating the offset value with a random number.

  In the above-described embodiment, the series of processes performed by the wireless base station 1, the server 10, the client PC 11, and the like are stored in a computer-readable recording medium in the form of a program. Is read and executed, the above processing is performed. That is, each processing means and processing unit in the wireless base station 1, the server 10, the client PC 11, and the like is processed by a central processing unit such as a CPU by reading the above program into a main storage device such as a ROM or a RAM. This is realized by executing arithmetic processing.

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

It is a block diagram which shows the structure of the server delivery information synchronization system by embodiment of this invention. It is a conceptual diagram which shows the management state of the wireless base station in a server. It is a conceptual diagram for demonstrating the asynchronous operation | movement with client PC. It is a conceptual diagram for demonstrating operation | movement of the server delivery information synchronization system by this embodiment. It is a conceptual diagram for demonstrating operation | movement of the server delivery information synchronization system by this embodiment. It is a conceptual diagram for demonstrating operation | movement of the server delivery information synchronization system by this embodiment. In this embodiment, it is a conceptual diagram which shows the timing of HTTP GET when a some web browser (each 2 each) is operate | moved by each of a some client PC. FIG. 2 is a block diagram showing event-driven and pull-type system configurations according to the prior art.

Explanation of symbols

1 wireless base station 10 server 10-1 HTTP server (response means, time information generation means)
10-2 SNMP server 10-3 Database server 11-1 to 11-3 Client PC (terminal, information request means)
12 NTP server

Claims (2)

An information distribution method in a system in which a server and a terminal are connected via a communication network,
When the server receives the information request from the terminal, the server transmits time information indicating the timing of performing the information request to the terminal;
The terminal making the information request based on the time information;
When the server receives an information request based on the time information, transmitting information on the information request to the terminal;
Including
In the step of transmitting the time information, the server transmits the same time information to the same terminal,
The terminal obtains the related information from the server by requesting the related information using the same time information when displaying the related information associated with each other separately in a multi-window. Synchronize the timing of
An information delivery method characterized by the above. An information system in which a server and a terminal are connected via a communication network,
When the server receives an information request from the terminal, the server includes time information transmitting means for transmitting time information indicating a timing for performing the information request to the terminal ,
The terminal includes information requesting means for making the information request based on the time information,
The server further receives the information request based on the time information, Bei example means for transmitting information to said information request to said terminal,
The time information transmitting means transmits the same time information to the same terminal,
The terminal obtains the related information from the server by requesting the related information using the same time information when displaying the related information associated with each other separately in a multi-window. Synchronize the timing of
An information system characterized by that.

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