JP5248481B2 - Server / client system and alarm data transmission / reception method in server / client system - Google Patents

Description

  The present invention relates to a server / client system and an alarm data transmission / reception method in the server / client system.

  In recent years, in systems such as a server / client system, the performance of the network itself for transmitting information (or services) has been improved along with higher functionality and higher performance. The fact is that durability has not been improved yet.

  Possible causes are that the capital investment cannot catch up and that the number of services per system (the number of objects to be monitored and controlled) is enormous and a large amount of alarm information is transmitted at the time of failure.

Under such circumstances, conventionally, many event reports are stored in a limited storage area by storing duplicate information in the basic data storage area and storing difference information in the difference data storage area. An information management device and a network system that store information are disclosed (for example, Patent Document 1 below).
JP 2002-189644 A

  However, the technique of Patent Document 1 has a problem of increasing the load on the network between the monitoring apparatus and the monitored apparatus when the monitored object fails and a large amount of alarm information is generated. In addition, it takes time to transmit and receive alarm information, and there is a problem that pressures other processes such as generation and restoration of alarm information. On the other hand, in a server / client system that monitors an object to be monitored, it is desired to reduce the memory usage as much as possible in the server device or the client device.

  Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a server / client system in which traffic of a communication network is reduced, and an alarm data transmission / reception method in the server / client system.

  Another object of the present invention is to provide a server / client system and the like in which memory usage is optimized.

  Furthermore, another object of the present invention is to provide a server / client system with improved reliability.

  In order to achieve the above object, according to one embodiment of the present invention, in a server / client system in which a client device and a server device are connected to each other via a communication network, the client device includes a monitored object. A transmission table that stores first alarm data collected in the past, and a transmission unit that transmits difference information between the second alarm data currently collected for the monitored object and the first alarm data, and The server device includes a reception table that stores the first alarm data transmitted from the client device, and a server-side learning processing unit that stores the received difference information in the reception table. The reception table has the same structure, each of the first alarm data stored in the transmission table and the reception table, and The difference information is stored in the same address of the transmission table and the reception table, the transmission unit transmits the address of the transmission table together with the difference information, and the server side learning processing unit is based on the received address The difference information is stored in the reception table.

  In order to achieve the above object, according to another embodiment of the present invention, in the alarm data transmission / reception method in the server / client system in which the client device and the server device are connected to each other via a communication network, the client The apparatus stores in the transmission table first alarm data collected in the past for the monitored object, and transmits the difference information between the second alarm data currently collected for the monitored object and the first alarm data. A table, the address of the transmission table storing the difference information and the difference information are transmitted to the server device, and the server device stores the first alarm data transmitted from the client device In the received table, the difference information is recorded at the same address as the received address.

  ADVANTAGE OF THE INVENTION According to this invention, the alarm data transmission / reception method in a server client system which reduced the traffic of the communication network, and a server client system can be provided. Further, according to the present invention, it is possible to provide a server / client system and the like in which the memory usage is optimized. Furthermore, according to the present invention, a server / client system with improved reliability can be provided.

FIG. 1 is a diagram showing a configuration example of a server / client system. FIG. 2 is a diagram illustrating an example of a reception table, a reception pointer, and the like. FIG. 3 is a diagram illustrating an example of a transmission table, a transmission pointer, and the like. FIG. 4 is a diagram showing an example of state transition of the server / client system. FIG. 5 is a flowchart showing an example of the entire process. FIG. 6 is a flowchart showing an example of the entire process. FIG. 7 is a flowchart showing an example of the memory initialization process. FIG. 8 is a flowchart showing an example of the memory initialization process. FIG. 9 is a flowchart showing an example of the frame check process. FIG. 10 is a flowchart showing an example of the frame check process. FIG. 11A shows an example of a transmission pointer, and FIG. 11B shows an example of a transmission table. 12A and 12B show alarm data flowing through the communication network, and FIGS. 12C to 12E show examples of reception tables and the like. FIG. 13A shows an example of a transmission pointer, and FIG. 13B shows an example of a transmission table. FIGS. 14A and 14B show alarm data flowing through the communication network, and FIGS. 14C to 8E show examples of reception tables and the like. FIG. 15A shows an example of a transmission pointer, and FIG. 15B shows an example of a transmission table. FIGS. 16A and 16B are diagrams showing alarm data flowing through the communication network, and FIGS. 16C to E are diagrams showing examples of reception tables and the like. 17A shows a refresh counter, FIG. 17B shows a transmission pointer, and FIG. 17C shows an example of a transmission table. FIG. 18A shows alarm data flowing through the communication network, and FIGS. 18B to 18D show examples of reception tables and the like. FIG. 19A shows an example of a transmission pointer, and FIG. 19B shows an example of a transmission table. 20A and 20B show alarm data flowing through the communication network, FIGS. 20C and 18E show reception tables, and FIG. 14D shows an example of the out-of-synchronization notification flag. FIG.

Explanation of symbols

1: server / client system 10-1 to 10-n: client device 11: client processing unit 12: monitoring point management information storage unit 13: clock LSI 14-1 to 14-n: monitoring target unit 30: server device 31: Server processing unit 32: management information database (DB) 33: alarm history database (DB)
110: Information collection unit 111: Learning processing unit 112: Alarm frame generation unit 113: Alarm frame transmission unit 114: Data reception unit 310: Alarm frame reception unit 311: Learning processing unit 312: Alarm frame analysis unit 313: Visible unit 314: Data transmitter

  The best mode for carrying out the present invention will be described below.

  FIG. 1 is a diagram showing a configuration example of a server / client system (hereinafter, simply “system”) 1. The system 1 includes a plurality of client devices (NE: Network Element, device monitored side) 10-1 to 10-n and a server device (NE-OpS: Network Element-Operation System, device monitoring side) 30. Are connected to each other via a communication network (DCN (Data Communication Network)) 100. In the present system 1, a plurality of client devices 10-1 to 10-n to be monitored are connected to one server device 30.

  The client devices 10-1 to 10-n receive centralized management of the server device 30 and autonomously transmit the service state and the failure state to the server device 30 using the communication network 100. On the other hand, the server device 30 controls and monitors the client devices 10-1 to 10-n, and obtains service states and failure states from the client devices 10-1 to 10-n using the communication network 100. Further, control for the purpose of service maintenance is performed on the client apparatuses 10-1 to 10-n.

  Further, in the present system 1, an upper server device 50 as a server for upper layer monitoring and a plurality of client terminals 60-1 to 60-n are connected via a communication network (DCN) 200. The state of the system 1 is constantly monitored by the host server device 50 and the plurality of client terminals 60-1 to 60-n.

  Each client device 10-1 to 10-n has the same configuration, and the client device 10-1 will be described as a representative. The client device 10-1 includes a client processing unit 11, a monitoring point management information storage unit 12, a clock LSI 13, and monitoring target units 14-1 to 14-n.

  The client processing unit 11 performs various processes in the client device 10-1. The client processing unit 11 has collected information (each element constituting the alarm data) from the monitoring target units 14-1 to 14-n, and has transmitted the collected alarm data to the server device 30 in the past. A learning processing unit 111 that determines whether or not, an alarm frame generation unit 112 that generates an alarm frame (a frame composed of alarm data) to be transmitted to the server device 30, and transmits the generated alarm frame to the server device 30 An alarm frame transmitting unit 113 for receiving data and a data receiving unit 114 for receiving data from the server device 30.

  The monitoring point management information storage unit 12 stores information for changing the information collected by the information collecting unit 110 into a format that can be easily understood by a user or the like who operates the system 1. The information collected by the information collection unit 110 is encoded, for example, and the learning processing unit 111 and the alarm frame generation unit 112 access the monitoring point management information storage unit 12 so that a user or the like can understand from the encoded information. To easy-to-use information.

  The clock LSI 13 is a so-called timer and outputs time information to the client processing unit 11.

  The monitoring target units 14-1 to 14-n are portions that actually monitor the monitoring target. For example, when an optical fiber is a monitoring target, the monitoring target units 14-1 to 14-n are connected to each line and path of the optical fiber. (Bundle consisting of multiple lines) is monitored.

  The server device 30 includes a server processing unit 31, a management information database (DB) 32, and an alarm history DB 33.

  The server processing unit 31 performs various processes in the server device 30, and the alarm frame receiving unit 310 that receives an alarm frame from the client devices 10-1 to 10-n and the same alarm in the past from the received alarm frame A learning processing unit 311 that determines whether data has been received, an alarm frame analysis unit 312 that analyzes the received alarm frame, a GUI (Graphical User Interface) display, and alarm data stored in the alarm history DB 33 The visible part 313 and the data transmission part 314 which transmits data to each client apparatus 10-1 to 10-n are provided.

  The management information DB 32 stores management information (building ID, path ID, etc.) to be added to the alarm data. The alarm history DB 33 stores alarm data to which management information is added.

  Next, the operation will be described. First, the overall operation will be described, and then the memory initialization operation and the received frame check operation (out of synchronization confirmation operation) will be described.

<Overall operation>
2 and 3 are diagrams showing an overall flow of how alarm data and the like are transmitted and received. FIGS. 4 to 6 show a state transition diagram of the system 1 and an example of processing of the entire operation. It is a flowchart.

  First, the state transition of this system 1 is demonstrated using FIG.

  In the present system 1, the two states of the learning non-state (S1) and the learned state (S2) are transitioned. The unlearned state is a state in which difference communication of alarm data in this embodiment cannot be performed. In this state, when alarm data is output from the monitoring target units 14-1 to 14-n, all elements of the alarm data are transmitted from the client devices 10-1 to 10-n to the server device 30. Thereby, the state of the system 1 shifts to a learned state (S2) where differential communication is possible.

  In the learned state (S2), all elements of alarm data are rarely transmitted and received, and some elements are transmitted as alarm data (alarm frames) from the client apparatuses 10-1 to 10-n to the server apparatus 30. The Since all elements are not transmitted, this is called differential communication. In the learned state, the alarm data stored in the client devices 10-1 to 10-n and the server device 30 are cleared when the alarm-free state continues for a certain period of time or when the server device 30 detects that transmission and reception are out of synchronization. (Refresh). Then, the system 1 shifts from the learned state to the unlearned state, and repeats the above-described state.

  Next, the process will be described in detail with reference to FIG. This will be described with reference to FIG. FIG. 5 shows client devices (NE: Network Element, device monitored side) 10-1 to 10-n (the configuration and operation of each client device 10-1 to 10-n are the same, so the client device 10-1). This will be described with reference to FIG.

  First, when this process is started (S10), a memory initialization process is executed in the client device 10-1 (S11). Details will be described later.

  Next, the information collection unit 110 of the client device 10-1 collects the alarm status from the monitoring point (polling collection) (S12). That is, the information collection unit 110 collects alarm conditions from the respective monitoring target units 14-1 to 14-n.

  Next, the learning processing unit 111 determines whether transmission processing has been performed in the past (S13). The learning processing unit 111 determines whether the collected alarm data has been transmitted in the past by searching the transmission table.

  FIG. 3 shows an example of the transmission table 15. The transmission table 15 is stored, for example, in the memory of the client device 10-1. The transmission table 15 stores each element of alarm data that has occurred in the past.

  The transmission table 15 includes an “occurrence time” when an alarm is generated, a “building ID” for identifying each building, an “apparatus No” indicating the number of a device to be monitored, and a location where the alarm is detected “ “ALM detection location”, “ALM type” indicating the type of alarm such as physically broken, “path ID” for identifying a path that is a bundle of lines when the monitoring target is an optical fiber, It consists of items such as “contract line ID” (also referred to as cross-connect ID) for identifying a cross-connect (one optical fiber device).

  The learning processing unit 111 searches the transmission table 15 to determine S13 depending on whether or not there is alarm data having the same value as the collected alarm data (all elements except “time”).

  Returning to FIG. 5, when the transmission process has not been performed in the past (No in S13), that is, when the same alarm data (except for “time”) as the collected alarm data is not in the transmission table 15, the learning processing unit 111 stores all elements of the collected alarm data in the transmission table 15 (S14). Further, the learning processing unit 111 stores information necessary for each item of the transmission pointer 16.

  The transmission pointer 16 is a table stored in the memory in the client device 10-1, and as shown in FIG. 3, a value from “0001” to “FFFF” is sequentially assigned to each alarm data “frame check”. ”,“ Pointer ”indicating the absolute address on the memory of the transmission table 15 in which each alarm data is stored, and“ learning presence / absence ”indicating whether or not the same alarm data (except“ time ”) has been transmitted in the past It consists of each item of “flag”.

  The learning processing unit 111 increments the last value of the “frame check” stored so far in the “frame check” of the transmission pointer 16 and stores the value (S14). Further, the learning processing unit 111 stores the memory address of the transmission table 15 in which the collected alarm data is stored in the “pointer”, and stores “learning not present (value indicating)” in the “learning presence / absence flag”.

  Returning to FIG. 5, when the learning processing unit 111 determines that the sending process has been performed in the past (Yes in S13), that is, the same alarm data as the collected alarm data (excluding the “time” element). Is stored in the transmission table 15, the collected alarm data is not recorded in the transmission table 15, but the necessary information is stored in the transmission pointer 16 (S15).

  That is, the learning processing unit 111 stores a value obtained by incrementing the last value in the “frame check” of the transmission pointer 16, and the position of the transmission table 15 in which the same alarm data is stored in the “pointer” (the same The address in the memory of the transmission table 15 in which the alarm data is stored is stored, and “learned (indicating value)” is stored in the “learning presence / absence flag”.

  Returning to FIG. 5, when the processes of S14 and S15 are completed, the alarm frame generation unit 112 stores necessary data in the transmission buffer 17 (S16).

  An example of the transmission buffer 17 is shown in FIG. The transmission buffer 17 is a buffer for accumulating alarm data (actually alarm frames) that are actually transmitted to the communication network 100, and includes a header portion and a data portion. The header portion stores the transmission pointer 16 and the data portion stores each element of the transmission table 15. However, the alarm frame generation unit 112 refers to the “learning presence / absence flag” of the transmission pointer 16 and stores all the elements of the alarm data of the transmission table 16 in the data unit if “learning is not performed”. On the other hand, when “learned”, the alarm frame generation unit 112 stores only “time” in the alarm data of the transmission table 16 in the data part. This is to realize differential communication. The “time” data is acquired from the clock LSI 13.

  Returning to FIG. 5, the alarm frame transmission unit 113 then reads alarm data from the transmission buffer 17 to create an alarm frame, and transmits the alarm frame to the server device 30 (S <b> 17). In this embodiment, when the number of alarms is “n”, “n” alarm frames are created.

  Then, a series of processing in the client device 10-1 ends (S18).

  FIG. 6 is a flowchart illustrating an example of processing in the server device 30. This will be described with reference to FIG.

  First, when this process is started in the server device 30 (S20), the alarm frame receiving unit 310 receives an alarm frame (S21). The alarm frame receiving unit 310 stores (decompresses) the received alarm frame in the reception buffer and the reception pointer of the server device 30. An example of the reception buffer and the reception pointer is shown in FIG.

  The reception buffer 35 has the same structure as the transmission buffer 17 in the client device 10-1, and includes a header part and a data part. The alarm frame receiving unit 310 stores the received alarm data in each item of the reception buffer 36.

  Also, the reception pointer 36 has the same structure as the transmission pointer 16 of the client apparatus 10-1, and includes items of “frame check”, “pointer”, and “learning presence / absence flag”. The alarm frame receiving unit 310 stores the data of each item in the header part of the alarm frame in each item of the reception pointer 36.

  Next, the received frame check process is performed in the server device 30 (S22). Details will be described later.

  Next, the learning processing unit 311 of the server device 30 determines whether or not the received alarm frame has been received in the past (S23). The learning processing unit 311 refers to the item of “learning presence / absence flag” of the reception pointer 36, determines that it has been received in the past if “learned”, and has not received it in the past if “learned”. to decide. Since the flag is stored for each alarm data, it can be determined for each alarm.

  When the reception process has not been performed in the past (No in S23), that is, when the “learning presence / absence flag” is “not learned”, the learning processing unit 311 records necessary data in the reception table (S24). FIG. 2 shows an example of the reception table 37. The reception table 37 has the same structure as the transmission table 15 of the client device 10-1, and stores detailed elements of the alarm. In this process, the learning processing unit 311 records all elements of the alarm data at the address indicated by the “pointer” of the reception pointer 36. That is, the learning processing unit 311 records all elements at the address of the memory in which the reception table 37 is stored, which is indicated by the pointer. In the present embodiment, the address of the memory in which the transmission table 15 in the client device 10-1 is stored and the address in the memory in which the reception table 37 in the server device 30 is stored must be the same.

  Returning to FIG. 6, on the other hand, when the reception processing has been performed in the past (Yes in S23), that is, when the “learning presence / absence flag” is “learned”, the learning processing unit 311 refers to the “pointer” and receives Only “time” is overwritten in the table 37 (S25). When the reception process has been performed in the past, alarm data having the same value exists except for the “time” element of the reception table 37, so that only the “time” element is written in the reception table 37.

  Next, the alarm frame analysis unit 312 decomposes the received alarm frame by the number of alarms, and gives management information to the alarm data (S26). The alarm frame analysis unit 312 does not transmit “building ID”, “path ID”, and “contract line ID” from the client device 10-1 in the received alarm frame. Store in the corresponding item of the reception table 37. The alarm frame analysis unit 312 reads the corresponding ID from the management information D 832 and stores it in the reception table 37.

  Next, the visible unit 313 displays the created alarm data in the GUI, stores it in the alarm history DB 33, or transmits it to the upper server device 50 (S27).

  Then, a series of processing ends (S28).

  As described above, in this embodiment, when alarm data having the same elements other than “time” in the alarm data is transmitted in the past, “time” is transmitted among the difference information, and the other is not transmitted. Therefore, the traffic of the communication network 100 can be reduced as compared with the case where all elements are transmitted to the server device 30. Moreover, since the amount of transmission data can be reduced, the burden on processing other than reception processing can be reduced in the server device 30 on the receiving side. Further, regarding the memory, the alarm data stored in the past (alarm data transmitted and received in the past) is left as it is in the transmission table 15 and the reception table 37, and difference information (time or alarm data that has not been transmitted in the past). Is also overwritten (including the alarm data), the memory capacity can be reduced compared to the case where all elements are stored each time an alarm occurs.

<Memory initialization operation>
Next, the memory initialization operation will be described. FIG. 7 is a flowchart showing an example of the initialization operation process in the client device 10-1, and FIG. 8 is a flowchart showing an example of the initialization operation process in the server device 30.

  First, the information collection unit 110 of the client device 10-1 collects alarm status (polling collection) from the monitoring target units 14-1 to 14-n (S111).

  The information collection unit 110 performs the following operation on the refresh counter 18 (see FIG. 3) at the timing of this processing. First, the refresh counter 18 will be described. The counter 18 includes a “previous state” indicating a previous state, a “current state” indicating a current state, and a “decrement counter” decrementing from an initial value. . The information collection unit 110 sets the time point when the alarms from the monitoring target units 14-1 to 14-n are detected as the start point of the “decrement counter”, and decrements the value of the “decrement counter” every time no alarm is detected. The initial value of the “decrement counter” is the number of polls. The alarm state is monitored for the number of times of polling, and when the “decrement counter” becomes “0”, the information collecting unit 110 sets “recovery” (indicating value) to “current state” because no alarm continues. Record in the item. On the other hand, when the “decrement counter” is not “0”, it means that the alarm has been detected at least once, and the information collecting unit 110 records “occurrence” (indicating value) in the item “current state”. When the status is monitored for the number of times of polling, the information collection unit 110 records “occurrence” or “recovery” stored in the “current state” in the “previous state” item, and performs the above-described operation on the “current state”. Record the value.

  Next, the learning processing unit 111 of the client device 10-1 performs initialization determination as to whether or not the alarm-free state has continued for a certain period (S112). The learning processing unit 111 refers to the refresh counter 18 and determines that the alarm-free state has continued for a certain period when “occurrence” and “recovery” are recorded in the “previous state” and the “current state”, respectively. Otherwise, it is determined not to continue.

  When the no alarm state continues for a certain period (Yes in S112), the learning processing unit 111 determines that the transmission table 15 and the transmission pointer 16 need to be refreshed, and initializes them (S113). Furthermore, since the server device 30 also needs to be refreshed synchronously, the learning processing unit 111 records a value indicating refresh of the server device 30 in the “frame check” of the transmission pointer 16, for example, “0000”.

  On the other hand, in the initialization determination, when the alarm-free state does not continue for a certain period (No in S112), or after the processing of S113 is completed in the learning processing unit 111, the alarm frame generation unit 112 displays the header portion of the transmission buffer 17. Then, the element of the transmission pointer 16 is set, and each element of the transmission table 15 is set in the data part of the transmission buffer 17 (S114).

  Next, the alarm frame transmission unit 113 transmits the generated alarm frame to the server device 30 (S115).

  Then, the initialization operation process in the client device 10-1 ends (S116).

  FIG. 8 is a flowchart illustrating an example of processing in the server device 30 when the alarm frame is received.

  The server device 30 receives the alarm frame in which a value indicating refresh is inserted in the alarm frame receiving unit 310 (S30). The alarm frame receiving unit 310 records (decompresses) the received alarm frame in the reception buffer 35 (see FIG. 2), and further records (decompresses) the data of the header part of the alarm frame in the reception pointer 36.

  Next, the learning processing unit 311 of the server device 30 performs initialization determination as to whether or not the alarm-free state has continued for a certain period (S31). The learning processing unit 311 refers to the value inserted in the “frame check” item of the reception pointer 36, and when “0000”, there is a refresh request from the client device 10-1, that is, no alarm is in a certain period of time. Judge that continued.

  When the no alarm state continues for a certain period (Yes in S31), the learning processing unit 311 determines that the refresh is necessary, and initializes the reception table 37 and the reception pointer 36 of the server device 30 (S32).

  On the other hand, in the initialization determination, when the no-alarm state does not continue for a certain period (No in S31) and when the refresh is completed in the learning processing unit 311 (S32), a series of initialization processes in the server device 30 ends. (S33).

  Thus, in the present system 1, when the state without alarm continues for a certain period, the transmission table 15 and transmission pointer 16 of the client device 10-1 and the reception pointer 36 and reception table 37 of the server device 30 are initialized. Therefore, the memory usage can be optimized.

  In this initialization process, “0000” has been described as a value that requires refreshing. Of course, this is merely an example, and it is a value that can identify that the client device 10-1 and the server device 30 require refreshing. Any value is acceptable.

<Receiving frame check operation (out of synchronization confirmation operation)>
Next, an operation for confirming a loss of synchronization between the client apparatus 10-1 and the server apparatus 30 by checking the received frame will be described. FIG. 9 is a flowchart showing an example of processing of the server device 30, and FIG. 10 is a flowchart showing an example of processing of the client device 10-1.

  In this operation, when the server device 30 checks for out-of-synchronization and detects out-of-synchronization, a flag indicating that is transmitted to the client device 10-1, and the client device 10-1 described above based on the flag. Perform initialization. Accordingly, the server device 30 also performs an initialization operation.

  For example, when a failure occurs in the communication network 100, the transmission side (client device 10-1) and the reception side (server device 30) may be out of synchronization. On the other hand, by executing this processing, a shift between the address of the transmission table 15 of the client apparatus 10-1 and the address of the reception table 37 of the server apparatus 30 due to loss of synchronization is prevented. Reliability can be improved.

  This will be described in detail. As shown in FIG. 9, the alarm frame receiving unit 310 of the server device 30 receives the alarm frame from the client device 10-1, and records (decompresses) the alarm frame in the reception buffer 35 and the reception pointer 36 (S221).

  Next, the learning processing unit 311 checks the received frame and detects whether or not synchronization is lost (S222). The learning processing unit 311 refers to the item “frame check” of the reception pointer 36 (or the data portion of the reception buffer 36), checks whether or not it has been sequentially incremented from “0001”, and continuously When it is incremented, it is determined that it is not out of synchronization, and when it is not continuous, it is determined that it is out of synchronization.

  In the client device 10-1, the alarm data recorded in the transmission table 15 is recorded in “frame check” of the transmission pointer 16 in order from “0001”, and the alarm data is transmitted to the server device 30. If the client device 10-1 and the server device 30 are not synchronized, the alarm data is not transmitted in order. In this embodiment, the loss of synchronization is confirmed by confirming this “frame check”.

  When the learning processing unit 311 detects out-of-synchronization (Yes in S222), the learning processing unit 311 determines that refresh is necessary, and records the number (NE number) of the target client device 10-1 in the out-of-synchronization notification flag. FIG. 2 shows an example of an area 38 (hereinafter simply referred to as “out of synchronization notification flag”) where an out of synchronization notification flag is recorded. Since the alarm frame transmitted from the client apparatus 10-1 is inserted with a number for identifying each client apparatus 10-1 to 10-n, the learning processing unit 311 extracts the target number from the alarm frame. Record in the out-of-synchronization notification flag 38.

  When the learning processing unit 311 does not detect loss of synchronization (No in S222) or when the learning processing unit 311 ends the processing of S223, the data transmission unit 314 sends the data to the client device 10-1. Send. If out-of-synchronization is detected, an out-of-synchronization notification flag is transmitted to the client device 10-1 (S224).

  Then, the out-of-synchronization check process in the server device 30 ends (S225).

  On the other hand, in the client device 10-1, as shown in FIG. 10, the data receiving unit 114 receives data from the server device 30 (S40). When the out-of-synchronization notification flag is transmitted, the flag is received.

  Next, the learning processing unit 111 determines whether or not synchronization is lost from the received data (S41). When the out-of-synchronization notification flag transmitted from the server device 30 is received, it is determined that it is out-of-synchronization.

  When learning is detected as being out of synchronization (Yes in S41), the learning processing unit 111 determines that refresh is necessary, and initializes the transmission table 15 and the transmission pointer 16 (S42). Further, the learning processing unit 111 records “0000” indicating refresh in the “frame check” of the transmission pointer 16. Processing similar to the initialization operation described above is performed. The alarm frame in which “0000” is inserted in “Frame Check” is transmitted from the client device 10-1 to the server device 30, and the server device 30 executes the processing shown in FIG. Alternatively, this process (S22) is executed in the overall operation as shown in FIG.

  Note that the processing of S43 and S44 shown in FIG. 10 is the same as the processing of S16 and S17. By performing the out-of-synchronization check process in the overall operation, the reliability of the system 1 is improved.

<Other examples>
Next, another specific example will be described with reference to FIGS.

  FIGS. 11A to 12E are examples in which all alarm data is “learned”. As shown in FIG. 11A, “learned” is recorded in all “learning presence / absence flags” of the transmission pointer 16, and all elements are transmitted as shown in FIGS. 12A and 12B. The The server device 30 writes all the elements of the alarm data in the reception tables 37-1 and 37-2. As shown in FIG. 12E, the alarm frame analysis unit 312 records information in “building ID”, “path ID”, and “contract line ID” (assignment of management information), and the reception table 37. -2 is generated.

  On the other hand, FIGS. 13A to 14E are examples in which all alarm data is “learned”. Since elements other than the difference information have been transmitted in the past, the time of the difference information is transmitted (see FIG. 14B). The server device 30 completes the table 37-1 by overwriting the “time” of the reception table 37-1 (see FIG. 14D).

  FIGS. 15A to 16E are examples in which “not learned” and “learned” are mixed. All elements are transmitted for “unlearned” alarm data, and elements for difference information are transmitted for “learned” alarm data.

FIGS. 17A to 18D are diagrams illustrating an example when “0000” indicating refresh is transmitted. Since the "previous state" is "occurrence" and the "current state" is "recovery", the refresh counter 18 transmits alarm data with "0000" inserted, assuming that there is no alarm state for a certain period of time. (See S18 (A)). The transmission table 15 and the transmission pointer 16 of the client apparatus 10-1 are initialized and “Null” is recorded (see FIG. 17B and FIG. 17C). The reception table 37-1 and the reception pointer 36 of the server device 30 are also initialized and “Null” is recorded (see FIG. 18B and FIG. 18C).
FIGS. 19A to 20F are diagrams illustrating examples of loss of synchronization. There is alarm data in which a value of “1234” is inserted in the “frame check” of the alarm data to be transmitted, which is out of synchronization. The server device 30 stops the processing, does not write to the reception tables 37-1 and 37-2, inserts the NE number into the out-of-synchronization notification flag (see FIG. 20D), and the client device 10-1. Send to. The subsequent steps are the same as those in the examples of FIGS. 17B to 18D. “Null” is recorded in the transmission table 15 and the like, and normal processing is performed from the refreshed state.

Claims (5)

In a server / client system in which a client device and a server device are connected to each other via a communication network,
The client device includes a first memory for storing a transmission table storing first alarm data collected for the monitored object, second alarm data collected for the monitored object, and the first alarm data. A transmission unit that transmits difference information with
The server device includes a second memory that stores a reception table that stores the first alarm data transmitted from the client device, and a server-side learning processing unit that stores the received difference information in the reception table. And
The first alarm data and the difference information stored in the transmission table and the reception table are stored at the same address in the first and second memories storing the transmission table and the reception table, respectively. The transmission unit transmits the address of the first memory storing the transmission table together with the difference information, and the server-side learning processing unit transmits the difference to the same address in the second memory as the received address. server-client system which is characterized in that to memorize the information. The transmission unit transmits a learning flag indicating whether or not an element excluding the difference information in the second alarm data is transmitted together with the difference information and the address,
2. The server according to claim 1, wherein the server-side learning processing unit stores the difference information in the reception table based on the address when detecting that the element is transmitted from the learning flag. Client device. The client device further includes a client side learning processing unit that initializes the transmission table when the second alarm data is not received continuously for a certain period of time,
The transmission unit transmits request data for requesting initialization of the reception table to the server device, and the server-side learning processing unit initializes the reception table when the request data is received. Item 4. The server / client device according to Item 1. The client device further includes a client-side learning processing unit that initializes the transmission table,
When the server-side learning processing unit determines that the client device and the server device are not synchronized, the server-side learning processing unit transmits an out-of-synchronization flag to the client device,
The client-side learning processing unit initializes the transmission table when receiving the out-of-synchronization flag, and the transmission unit transmits request data for requesting initialization of the reception table to the server device. The server / client apparatus according to claim 1, wherein the side learning processing unit initializes the reception table when the request data is received. In the alarm data transmission / reception method in the server / client system in which the client device and the server device are connected to each other via a communication network,
The client device stores first alarm data collected for the monitored object in a transmission table stored in a first memory, and collects the second alarm data and the first alarm data collected for the monitored object. Difference information is stored in the transmission table stored in the first memory, and the address of the first memory storing the transmission table in which the difference information is stored and the difference information are stored in the server device. To
The server device stores the difference information at the same address as the address of the received first memory in a second memory storing a reception table storing the first alarm data ;
The first alarm data and the difference information stored in the transmission table and the reception table are stored at the same address in the first and second memories respectively storing the transmission table and the reception table. A method for transmitting and receiving alarm data.

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