KR100744410B1 - Method For Flow Control for making Backup and Dumping Files in ESS - Google Patents

Abstract

The present invention relates to a file backup and dump control method in an electronic switchgear, and continuously transmits a predetermined number of packets without receiving a response signal corresponding to each packet transmitted during file transmission and reception between the electronic switchgear and the SMART system. After receiving a response signal for a packet transmitted continuously, it is possible to shorten the time required to check whether a packet is transmitted for a corresponding file and to reduce overhead due to packet retransmission.

In addition, it is possible to prevent packet loss due to transmission link failure, transmission error, and the like in advance, and thus there is an advantage in that reliability can be secured for file transmission for remote verification of massive software and station data in an electronic switchboard.

Description

Method for Flow Control for making Backup and Dumping Files in ESS}

1A to 1B are flowcharts illustrating a file backup process between a conventional electronic switch and a SMART system.

2A to 2B are flowcharts illustrating a file dumping process between a conventional electronic switch and a SMART system.

3A to 3B are flowcharts illustrating a file backup process between the electronic switch and the SMART system according to the present invention.

4A to 4B are flowcharts illustrating a file dumping process between an electronic switch and a SMART system according to the present invention.

The present invention relates to a method for controlling file backup and file dump between an electronic switch and a remote Time Division Exchange (TDX) Software Modification and Administration for Remote TDX (hereinafter referred to as SMART) system. More specifically, after transferring a certain number of packets continuously during file transfer between the common control processor (CCP) and the smart system of the common control subsystem (CCS) built in the electronic switch. The present invention relates to a file backup and dump control method in an all-electronic exchange that checks whether there is an abnormality in packet transmission with only one response signal (ACK signal).

The SMART system uses the data network to transmit the station data including the control data of the company (telephone station), subscriber information and trunk line information, and the software in the electronic switchboard installed and operated at the corresponding phone station to the remote software package production system. A system that performs a series of tasks online, such as receiving a new package or receiving a new package.

When the file is transferred between the SMART system and the electronic switchboard, the file information, which is the initial information about the file name and file size, is exchanged, and then the data of the file is divided into transmission units in the form of packet data. do.

1A to 1B are flowcharts illustrating a file backup process between a conventional electronic switch and a SMART system. The SMART system stores files stored in a disk (data storage unit) of a common control processor of a common control subsystem mounted in the electronic switch. A file backup process is transmitted to a disk (data storage unit) of an Ethernet and X.25 interface processor (hereinafter referred to as EXIP).

First, the operator receives a backup command through the input / output device of the electronic switchboard (S2), and the electronic switchboard transmits a file backup start signal (Start_Backup) to the SMART system (S4).                         

Receives a response signal (Start_Backup_Ack) in response to the file backup start signal allowing the file backup from the SMART system to start the file backup (S6), file information including the name of the file to be transmitted and the size of the file backup file information The signal is transmitted through the signal New_File_Backup (S8).

When receiving a backup file response signal (New_File_Backup_Ack) to transmit the backup file corresponding to the transmitted file information (S10), the file is divided into packets and transmitted sequentially from the first packet of the backup file (S12).

It waits for a predetermined time until receiving the response signal (Backup_Ack) for the transmitted packet, and determines whether the response signal has been received (S14), if not receiving the response signal is retransmitted (S16).

In order to prevent retransmission of the packet, flow control is performed to prevent duplicate retransmission of the packet by inserting and transmitting a sequence number of the packet on the data stream to prevent retransmission of the same packet multiple times.

As a result of the determination, if a response signal to the transmitted packet is received, it is determined whether there is a packet in the next order of the transmitted packet (S18), and if present, the next packet in waiting is transmitted (S20).

As a result of the determination, if there is no waiting packet in the next order, a file backup completion signal (One_File_End_Backup) indicating that the packet transmission for the file requested for backup is completed is transmitted (S22).

Receive a response signal that is a result of the transparency check for the file is completed backup from the SMART (S24), and determines whether the response signal is a new file transfer request response signal (One_File_End_Backup) for backing up a new file (S26), If the determination result is not a new file transfer request response signal but a signal for requesting retransmission of the transmitted file, the packet for the file is retransmitted again from the beginning (S12).

As a result of the determination, if a new file transfer request response signal is detected, it is determined whether there is a new backup file waiting (S28), and if there is a new backup file, a backup file information signal including file information of the corresponding file is transmitted to the SMART system ( S8).

As a result of the determination, if there is no file waiting to be transmitted, a backup end signal End_Backup indicating that there is no file to be backed up is further transmitted (S30), and a backup end response signal End_Backup_Ack, which is a response signal to the backup end signal, is received. Receive (S32).

In addition, if the hard disk space area allocated for file backup in the SMART system is not suitable for file backup in S6 or if the SMART system is currently backing up another file, the backup process of the SMART system is performed. Notify the electronic exchange that the file cannot be saved.

The transparency check on the backup completed file of the SMART system to check whether there is an abnormality in the file transmission and reception, comparing the file size information received from the electronic switchboard by the S8 with the size of the received file is equal to the file transmission Check transparency.

If the file size information and the size of the received file are not the same as the result of the check, the electronic switch is requested to retransmit the received file from the beginning, and if the same, the new backup file transfer is requested.

2A and 2B are flowcharts illustrating a file dumping process between a conventional electronic switch and a SMART system. The files stored in the Ethernet and X.25 matching processor disk (data storage) of the SMART system are mounted on the electronic switch. Represents a file dump process for transferring to a disk (data storage) of a common control processor of a common control subsystem.

First, the operator receives a dump command through the input / output device of the electronic switchboard (S50), and the SMART system transmits a file dump start signal (Start_Dump) to the electronic switchboard (S52).

Receive a response signal (Start_Dump_Ack) to the file dump start signal to allow the file dump from the electronic switchboard to start the file dump (S54), file information including the file name and the file size of the file to be transferred The signal is transmitted through the signal New_File_Dump (S56).

When receiving a dump file response signal (New_File_Dump_Ack) to transmit a dump file corresponding to the transmitted file information (S58), the file is divided into packets and transmitted sequentially from the first packet of the dump file (S60).

After waiting for a predetermined time until the response signal Dump_Ack is received for the transmitted packet, it is determined whether the response signal is received (S62), and if the response signal is not received, the packet is retransmitted (S64).

Retransmission of the packet is to prevent duplicate retransmission of the packet by inserting and transmitting a sequence number of the packet on the data stream in order to prevent retransmission of the same packet multiple times as shown in FIGS. 1A to 1B. Take control of the flow.

As a result of the determination, if a response signal to the transmitted packet is received, it is determined whether there is a packet of a next order of the transmitted packet (S66), and if present, a packet of the next waiting order is transmitted (S68).

As a result of the determination, if there are no packets of the next order waiting, a file dump completion signal (One_File_Dump) indicating that the packet transmission for the file for which the dump is requested is completed is transmitted (S70).

Receive a response signal that is a result of the transparency test for the file is completed dumped from the electronic switch (S72), and determines whether the response signal is a new file transfer request response signal (One_File_End_Dump) for dumping a new file (S74), If the determination result is not a new file transfer request response signal but a signal for requesting retransmission of the transmitted file, the packet for the file is retransmitted again from the beginning (S60).

As a result of the determination, if a new file transfer request response signal is detected, it is determined whether there is a new dump file waiting (S76), and if a new dump file exists, a dump file information signal including file information about the file is transmitted to the electronic switch. Transmit (S56).

As a result of the determination, if there is no file waiting to be transmitted, a dump end signal End_Dump indicating that there is no file to be dumped (S78), and a dump end response signal End_Dump_Ack, which is a response signal to the dump end signal, is received. (S80).                         

If the hard disk space area allocated for file dump in the switchboard is not suitable for dumping the file, or if the switchboard is currently dumping another file, the dumping process of the switchboard is performed. Notify the SMART system that the file cannot be saved.

The transparency test on the dump completion file of the electronic switch for checking whether there is an abnormality in the file transmission and reception is the same as the transparency check on the backup completion file in the SMART system of FIGS. 1A to 1B.

The command input to initiate the file backup or file dump is a method of receiving a backup or dump command through the input and output devices of the electronic switchboard and the console of the SMART system as shown in FIGS. 1A-1B and 2A-2B. Use the Graphical User Interface (GUI) feature to execute file backups and dumps.

As shown in FIGS. 1A to 1B and 2A to 2B, a file transfer control method between a conventional electronic switch and a SMART system first divides a file in packet units, transmits one packet, and then responds to the response packet. It is a method of transmitting the next waiting packet after receiving a message.

This method has a disadvantage in that the file transfer is delayed due to the reception of response packets for each packet and the overhead is likely to occur when a large file is backed up or dumped between an active electronic switch and a SMART system. .

 Therefore, in view of the above-described conventional problem, the present invention only transmits a packet for a file to be transmitted continuously in a predetermined number of times when transmitting and receiving a file between an electronic switch and a SMART system, and then only the last packet of the packet continuously transmitted. SUMMARY OF THE INVENTION An object of the present invention is to provide a file backup and dump control method in an electronic switchboard which transmits a response signal and processes the response signal as a response signal for a predetermined number of packets.

In the file backup control method of the remote software change and management unit (SMART) that receives the data generated from the electronic switch to achieve the above object and backs up the file,
A first step of requesting a file backup from the remote software change and management unit to the electronic switch;
A second step of checking whether the remote software change and management unit can execute a file backup;
Requesting, by the remote software change and management unit, file information including the name of the file to be backed up and the size of the file to the electronic switchboard;
The remote software change and management unit receives the file information from the switchboard, and includes a backup packet number indicating the number of packets that can be received continuously with the start position of the file, a backup including a size of each packet and a file name. Generating a packet reception information;
A fifth step of transmitting the backup packet reception information to an all-electronic switch;
Transmission error of the packet which has received the packet of the file according to the condition of the backup packet reception information from the all electronic switch as the number of the received packets, and successively received the backup progress information transmitted from the all electronic switching center. A sixth step of checking, wherein the backup progress information includes a check sum value and sequence number information of the received packet;
A seventh step of determining whether to continue the backup of the currently received file after the transmission error check; And
And if the backup of the currently received file is completed, an eighth process of determining whether to end the file backup according to whether there is a new file to be backed up.

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In addition, in the file dump control method of the electronic switchboard for receiving a file dump received from the remote software change and management unit (SMART) to achieve the above object,
Requesting a file dump from the electronic switchboard to the remote software change and management unit;
A second step of checking whether a file dump can be executed in the electronic switchboard;
Requesting dump file information including the name of the file to be dumped and the size of the file, to the remote software changer and management unit;
The electronic switch includes the number of received packets indicating the number of packets received by the remote software change and management unit from the remote software change and management unit and continuously received from the start position of the file, and the size of each packet and the name of the file. Generating a dump packet reception information;
A fifth step of transmitting the dump packet reception information to the remote software change and management unit;
Received the packet of the file according to the condition of the dump packet reception information from the remote software change and management unit as the number of received packets, continuously received the dump progress information transmitted from the remote software change and management unit and dumped to date A sixth step of checking a transmission error of the packet, wherein the dump progress information includes a check sum value and sequence number information of the received packet;
Determining, by the electronic switchboard, whether to continue dumping a file currently received after the transmission error check; And
And an eighth process of determining whether to end the file dump according to whether there is a file to be dumped when the backup of the currently received file is completed by the electronic switchboard.

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The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. DETAILED DESCRIPTION Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. For reference, file backup according to the present invention is performed in EXIP of the SMART system, and file dumping is performed in a common manner built in the electronic switchboard. In the common control process of the control sub system, the file backup and file dumping process will be described below with reference to FIGS. 3A to 4B.

3A to 3B are flowcharts illustrating a file backup process between the electronic switch and the SMART system according to the present invention. Unlike FIG. 1A to FIG. 1B, the SMART system controls the file backup and receives a certain number of packets continuously. It shows the file backup process that transmits a response packet later.

First, the operator receives a backup command through the input / output device of the electronic switchboard (S100), and transmits a file backup request signal SmtBkupReq requesting a file backup to the electronic switchboard (S102).

In operation S104, a file backup start signal SmtBkupStart indicating a file backup start signal is received as a response signal to the file backup request signal.

The SMART system checks whether the file backup can be performed normally or the backup disk space of the EXIP and whether there is a file currently being backed up, and then a backup requesting file information including the name of the file to be backed up and the size of the file is performed. The file information request signal FileBkupReq is transmitted to the electronic switch (S106), and file information including the name of the file and the size of the file is received through the backup file information signal FileBkupInfo (S108).

Through the received file information, file code request signal (FileCodeReq) including the number of packets to be received in succession, the starting position for the file to be backed up, the size and sequence number of each packet are transmitted to the switchboard. (S110).

The packet according to the file code request signal condition is received continuously (S112), and the checksum value and the sequence number information of the packet are continuously received for the transparency check on the packet continuously received to date. The backup progress information including the data is received through the file code end signal FileCodeEnd (S114).

A checksum value is generated for the packets received so far (S116), and it is determined whether the stored packet sequence number information is identical to the sequence number information of the packets received from the electronic switchboard (S118).

As a result of the determination, if it is not the same, the packet data received after the error is destroyed after the packet data received thereafter is requested to be retransmitted from the packet where the error occurred (S120), and received again from the requested packet (S122). .

As a result of the determination, when the sequence number information of the stored packet and the sequence number information of the packet received from the electronic switch are the same, it is determined whether the generated check sum value and the received check sum value are the same (S124).

As a result of the determination, if it is not the same, a request is made to retransmit the continuously received packets (S126), and the corresponding packets are received again (S112).

As a result of the determination, if the generated check sum value and the received check sum value are the same, it is determined whether there is a backup packet waiting for the backup file (S128). The file code request signal FileCodeReq is transmitted in order to receive continuously (S110).

As a result of the determination, if there is no waiting new backup packet, it is determined whether a waiting new backup file exists (S130), and if a new backup file does not exist, a backup end signal (SmtBkupEnd) indicating that the entire file backup is completed. The transfer to the electronic switch (S132).

As a result of the determination, if there is a new backup file waiting, a backup file information request signal FileBkupReq is transmitted to the electronic switch to receive the new backup file (S106).

4A to 4B are flowcharts illustrating a file dump process between an electronic switch and a SMART system according to the present invention. Unlike FIG. 2A to FIG. 2B, the electronic dump switch controls a file dump and receives a predetermined number of packets continuously. Shows the file dump process of sending a response packet after receipt.

First, the operator receives a dump command through the input / output device of the electronic switchboard (S150), and transmits a file dump request signal SmtDumpReq requesting a file dump to the SMART system (S152).

The file dump start signal SmtDumpStart, which notifies the start of the file dump, is received as a response signal to the file dump request signal from the all electronic switch (S154).

The electronic exchange checks whether file dumping can be performed normally, whether there is an excess of dump disk space of the common control processor, and whether a file is currently being dumped, and then file information including the name of the file to be dumped and the size of the file. The request dump file information request signal FileDumpReq is transmitted to the SMART system (S156), and file information including the name of the file and the size of the file is received through the dump file information signal FileDumpInfo (S158).

Through the received file information, a file code request signal (FileCodeReq) including the number of packets to be received in succession, a start position for a file to be dumped, and the size and sequence number of each packet is transmitted to the SMART system. (S160).

The packet according to the file code request signal condition is received continuously (S162), and the checksum value and the sequence number information of the packet continuously received for the transparency check on the packet continuously received up to now. The dump progress information including the received through the file code end signal (FileCodeEnd) is received (S164).

Generates a checksum value for the packet received up to now received (S166), and determines whether the sequence number information of the stored packet is the same as the sequence number information of the packet received from the SMART system (S168).

As a result of the determination, if the error is not the same, the packet data received after the error is destroyed after the packet data received thereafter is requested to be retransmitted from the packet where the error occurred (S170), and received again from the requested packet (S172). .

As a result of the determination, if the sequence number information of the stored packet and the sequence number information of the packet received from the electronic switch are the same, it is determined whether the generated check sum value and the received check sum value are the same (S174).

As a result of the determination, if it is not the same, it is requested to retransmit the continuously received packets (S176), and the corresponding packets are received again (S162).

As a result of the determination, when the generated check sum value and the received check sum value are the same, it is determined whether a waiting dump packet for the dump file exists (S178). The file code request signal FileCodeReq is transmitted to receive the signal (S160).

As a result of the determination, if there is no waiting new dump packet, it is determined whether a new waiting dump file exists (S180), and if the new dump file does not exist, a dump end signal (SmtDumpEnd) indicating that the entire file dump is completed. To transmit to the SMART system (S182).

As a result of the determination, if a new dump file is pending, a dump file information request signal FileDumpReq is transmitted to the SMART system in order to receive the new dump file (S156).

As described above, according to the present invention, after receiving a response signal corresponding to each packet transmitted during file transmission and reception between the electronic switch and the SMART system, a predetermined number of packets are continuously transmitted and then the packet is transmitted continuously. By receiving one response signal, it is possible to shorten the time required to check the presence or absence of packet transmission for the corresponding file and to reduce the overhead due to packet retransmission.

Accordingly, it is possible to prevent packet loss due to transmission link failure, transmission error, and the like in advance, and thus, there is an advantage that reliability can be secured for file transmission for remote verification of massive software and station data in an electronic switchboard.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (12)

In the file backup control method of the remote software change and management unit (SMART) that receives the data generated from the electronic switchboard and backs up the file, A first step of requesting a file backup from the remote software change and management unit to the electronic switch; A second step of checking whether the remote software change and management unit can execute a file backup; Requesting, by the remote software change and management unit, file information including the name of the file to be backed up and the size of the file to the electronic switchboard; The remote software change and management unit receives the file information from the switchboard, and includes a backup packet number indicating the number of packets that can be received continuously with the start position of the file, a backup including a size of each packet and a file name. Generating a packet reception information; A fifth step of transmitting the backup packet reception information to an all-electronic switch; Transmission error of the packet which has received the packet of the file according to the condition of the backup packet reception information from the all electronic switch as the number of the received packets, and successively received the backup progress information transmitted from the all electronic switching center. A sixth step of checking, wherein the backup progress information includes a check sum value and sequence number information of the received packet; A seventh step of determining whether to continue the backup of the currently received file after the transmission error check; And And a step (8) of determining whether to end the file backup according to whether there is a new file to be backed up when the backup of the currently received file is completed. The method of claim 1, The second process, Checking whether a backup space of the data storage to store the received backup file is sufficient to back up the file; And And checking whether there is another file currently being backed up. The method of claim 1, In the sixth step, the process of transmitting backup progress information from the electronic switchgear, Sending, by the electronic switch, a backup packet of the file to the remote software change and management unit; Determining whether the number of the transmitted backup packets and the number of transmission packets of the backup packet reception information are the same, and if the same is the same, generating the backup progress information and transmitting packet inspection information to the remote software change and management unit; And And if the number of the transmitted backup packets and the number of transmission packets of the backup packet reception information are not equal to each other, transmitting the backup packets in the next order of the transmitted backup packets to the remote software change and management unit. File backup control method in an electronic switchgear characterized in that. The method of claim 1, Transmission error checking for the packets received continuously in step 6, Determining whether the number of backup packets of the backup progress information received from the all electronic switch and the number of the received packets are the same, and if not the same, receiving again from the failed backup packet; Generating a checksum value for consecutively received packets if the number of received backup packets is the same as the number of received packets; Determining whether the checksum value of the backup progress information is identical to the generated checksum value, and if not, retransmitting all backup packets continuously received; And And requesting transmission of a new backup packet for the file if the check total value of the backup progress information and the generated check total value are the same. Way. The method of claim 1, The seventh process, Determining whether there is a new backup packet waiting for the file and receiving a new backup packet according to the sixth step if a new backup packet for the file currently being backed up exists; And And transmitting a backup code end message notifying that the backup of the file is completed if there is no new backup packet waiting. The method of claim 1, The eighth process, Determining whether a new backup file of the next order of the current backup file is present and transmitting a backup end message indicating that the entire file backup is completed if the new backup file does not exist; And And requesting information about a new backup file by the third process if a new backup file is pending, as a result of the determination. In the file dump control method of the electronic switchboard which receives the data generated by the remote software change and management unit (SMART) and dumps the file, Requesting a file dump from the electronic switchboard to the remote software change and management unit; A second step of checking whether a file dump can be executed in the electronic switchboard; Requesting dump file information including the name of the file to be dumped and the size of the file, to the remote software changer and management unit; The electronic switch includes the number of received packets indicating the number of packets received by the remote software change and management unit from the remote software change and management unit and continuously received from the start position of the file, and the size of each packet and the name of the file. Generating a dump packet reception information; A fifth step of transmitting the dump packet reception information to the remote software change and management unit; Received the packet of the file according to the condition of the dump packet reception information from the remote software change and management unit as the number of received packets, continuously received the dump progress information transmitted from the remote software change and management unit and dumped to date A sixth step of checking a transmission error of the packet, wherein the dump progress information includes a check sum value and sequence number information of the received packet; Determining, by the electronic switchboard, whether to continue dumping a file currently received after the transmission error check; And And an eighth process of determining whether to end the file dump according to whether there is a file to be dumped when the backup of the currently received file is completed by the electronic switchboard. Way. The method of claim 7, wherein The second process, Checking whether a dump space of a data storage to store the received dump file is sufficient to dump the file; And And checking whether there is another file currently being dumped. The method of claim 7, wherein In the sixth step, the process of transmitting dump progress information from the remote software change and management unit includes: Sending, by the remote software change and management unit, a dump packet of the file to the switchboard; Determining whether the number of the transmitted dump packets and the number of transmission packets of the dump packet reception information are the same, generating the dump progress information, and transmitting packet inspection information to the electronic switchboard if the number is the same; And And if the number of the transmitted dump packets and the number of transmission packets of the dump packet reception information are not the same as the result of the determination, transmitting the dump packets of the next order of the transmitted dump packets to the electronic switch. File dump control method in all electronic switch. The method of claim 7, wherein Transmission error checking for the packets received continuously in step 6, Determining whether the number of dump packets of the dump progress information received from the remote software change and management unit and the number of received packets are the same, and if not the same, receiving the received dump packet again from an error; Generating a checksum value for consecutively received packets if the number of received dump packets and the number of received packets are the same as the determination result; Determining whether the check sum value of the dump progress information and the generated check sum value are the same, and if not, retransmitting all dump packets continuously received; And And requesting transmission of a new dump packet for the file if the check sum value of the dump progress information and the generated check sum value are the same. Way. The method of claim 7, wherein the seventh process, Determining whether there is a new dump packet waiting for the file, and receiving a new dump packet according to the fourth to sixth processes if a new dump packet for the file currently being dumped exists; And And transmitting a dump code end message notifying that the dump operation for the file has ended when there is no new dump packet waiting. The method of claim 7, wherein the eighth process, Determining whether a new dump file in the next sequence of the current dumped file exists, and if a new dump file does not exist, transmitting a dump end message indicating that the entire file dump operation is completed; And And requesting information about a new dump file by the third process if a new dump file is pending, as a result of the determination.

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