KR100340210B1 - Program download method of subscriber transmitting station - Google Patents

Abstract

The present invention relates to a program download method of a subscriber transmission apparatus using an asynchronous transmission method. In particular, when a program download command is generated by an operator of a network management system, a download request protocol data is provided with program information to be downloaded from the network management system. A first step of generating and transmitting to the central control apparatus; generating an ATM cell bus frame at the central control apparatus, and broadcasting the download request protocol data on the ATM cell bus frame to broadcast to the remote control apparatus; A second step of analyzing, by the remote control device, the download request protocol data received from the central control device, generating response protocol data according to the analysis result, and transmitting the response protocol data to the central control device; Remote control unit And a fifth process of transmitting the response protocol data received from the device to the network management system, and a fifth process of analyzing the response protocol data by the network management system and performing a corresponding process. When downloading control commands or control programs for upgrading an installed program, all remote control devices that perform the same function are simultaneously designated and transmitted, thereby shortening the program download time.

Description

Program download method of subscriber transmitting device

The present invention relates to a program download method of a subscriber transmission device, and more particularly, to a program download method of a subscriber transmission device by an asynchronous transmission method, a network management system (NMS) for upgrading a program installed at an arbitrary site. In order to download the control command or control programs generated by the remote control device (RT), all the remote control device that performs the same function of the site, the program download of the subscriber transmission device, characterized in that for transmitting simultaneously It is about a method.

The subscriber transmitter is a device for providing a connection path between each subscriber and a telephone station, the general configuration of which is shown in Figs.

FIG. 1 is a general configuration diagram of a subscriber transmission apparatus using a synchronous transmission scheme. Referring to FIG. 1, a subscriber transmission apparatus using a synchronous transmission scheme is a network management system (NMS) installed in the telephone station 100 ( 110 and a plurality of central control devices (COT # 1: Central Office Terminal # 1, COT # n) (130, 140) connected to the network management system (NMS) 110 by a LAN 120; And remote control devices (RT # 11: Remote Terminal, RT # 12, RT # 1n) (150, 160, 170) connected to the central control unit (COT) by a transmission network of STM1 type.

At this time, the remote control devices (RT # 1, ..., RT # n) (150, 160, 170) is a device for managing subscriber information for each group of the site, the central control device (COT # 1) ( Through the 130, the control command or control programs generated by the network management system (NMS) 110 are downloaded and the corresponding subscribers are controlled.

To this end, the remote control devices (RT # 1, ..., RT # n) (150, 160, 170) is the central control device (COT # 1) 130 and the remote control devices (RT # 1, ...). Control from common units 151, 161 and 171 performing communication between RT # n, subscriber connection units 153, 163 and 173 to which subscribers are connected by group, and common units 151, 161 and 171. It includes a control unit (MCU: Main Control Unit) (152, 162, 172) to download the command or control program to control the subscribers connected to the subscriber connection unit (153, 163, 173).

Referring to the program download method of the subscriber transmission apparatus using the synchronous transmission scheme having the above configuration, the program is transferred from the central control unit (COT # 1) 130 to the remote control unit (RT # 11) 150. In case of downloading, the remote control device (RT # 11) receives the program through the common unit 151 and delivers the control signal to a plurality of control units (MCUs) 152 which output control signals to the subscriber connection unit 153 for each group. do.

That is, in order to download one control command or control program to subscribers, first, as much as the number of remote control devices connected to the central control unit in the central control unit to perform the download, and from the remote control unit to the remote control unit The number of downloads must be performed as many as the number of internal control units installed.

Therefore, the subscriber transmission apparatus based on this synchronous transmission method has a disadvantage in that the same operation must be repeated several times in order to download one control command or control program to all subscribers managed by the corresponding telephone station.

On the other hand, Figure 2 is a general block diagram of a subscriber transmission apparatus by the asynchronous transmission method, referring to Figure 2, in the case of the subscriber transmission apparatus by the asynchronous transmission method, the hardware configuration and operation of the subscriber transmission apparatus by the synchronous transmission method Similar to subscriber transmitters.

That is, in the case of the subscriber transmission apparatus using the asynchronous transmission method, the network management system (NMS: 210) installed in the telephone station 200, as in the case of the subscriber transmission apparatus using the synchronous transmission method, and the network. A plurality of central control units (HDT # 1: Host Digital Terminal # 1, HDT # n) 230 and 240 connected to a management system (NMS) 210 by a LAN 220, and the central control unit Remote control devices (ONU # 11: Optical Network Unit, ONU # 12, ONU # n1, ONU # n2, ONU # n3) connected to the STM1 type transmission network to the HDT, and each remote control device (ONU) # 11, ONU # 12, ONU # n1, ONU # n2, ONU # n3 are subscriber connection units 252, 262, 272, 282, and 292 to which subscribers of each group are connected, and the central control unit HDT # 1 or Control unit (MCU) (2) which downloads a control command or control program from HDT # n) (230, 240) and controls each subscriber connected to the subscriber connection unit (252, 262, 272, 282, 292). 51, 261, 271, 281, and 291.

Recently, the asynchronous signal processing method provides more flexibility in data transmission than the synchronous signal processing method, and therefore, the subscriber transmission device using the asynchronous transmission method is preferred to the subscriber transmission device using the synchronous transmission method. .

However, even in the case of the subscriber transmission apparatus using the asynchronous transmission method, the program download method is not much different from that of the subscriber transmission apparatus using the synchronous transmission method.

That is, as shown in the processing flowchart of the conventional program download method of FIG. 3, when a download command or program is generated in the network management system (S310), the central control unit that receives the command individually selects a device to download the command. After selecting (S320), the command or program is downloaded to the corresponding device (S330).

At this time, when the download to one remote control device is finished, the central control device selects another remote control device again, repeats the download to the remote control device, and the operation is performed by the central control device. Repeat until all downloads to all controlled remote control devices are complete.

Therefore, the conventional program download method has a disadvantage in that the program download efficiency is lowered by repeatedly performing the same operation while changing only the destination to be downloaded.

Therefore, in the present invention, in order to solve this disadvantage, in the program download method of the subscriber transmission apparatus by the asynchronous transmission method, a control command or control generated in the network management system to upgrade the program installed in any site When a program is to be downloaded to a remote control device, all remote control devices that perform the same function of the site are simultaneously designated and transmitted, thereby providing a method of shortening the program download time.

In order to achieve the above object, the program download method of the subscriber transmission apparatus provided by the present invention includes a network management system installed in a telephone station, a plurality of remote control devices for managing subscriber information for each group of sites, and the network management system. In the program download method of a subscriber transmitter configured as a central control unit for transmitting a control command or control programs generated in the remote control device, when a program download command is generated by the network management system operator, the program download command is downloaded from the network management system. A first process of generating download request protocol data with the program information to be transmitted to the central control apparatus, generating an ATM cell bus frame at the central control apparatus, and then transmitting the download request protocol data to the ATM cell bus frame; Load the above A second process of broadcasting to a remote control device; and analyzing, by the remote control device, the download request protocol data received from the central control device, generating response protocol data according to the analysis result and transmitting the result to the central control device; A third process of transmitting the response protocol data received from the remote control apparatus to the network management system, and the network management system analyzing the response protocol data and performing processing accordingly; It is characterized by consisting of a fifth process.

1 is a general configuration diagram of a subscriber transmission apparatus using a synchronous transmission scheme;

2 is a general configuration diagram of a subscriber transmission apparatus using an asynchronous transmission method;

3 is a flowchart illustrating a conventional program download method;

4 is a diagram illustrating a connection relationship between an HDT and an ONU of a subscriber transmission device using an asynchronous transmission method;

5 is a block diagram showing the internal configuration and interconnection relationship of the HDT and ONU of the subscriber transmission apparatus by an asynchronous transmission method;

6 is an internal block diagram of a subscriber transmission apparatus for performing a program download according to the present invention;

7 is a block diagram of ATM cell bus frame and protocol data for performing program download according to the present invention;

8 is a process flow diagram for a method of performing a program download according to the present invention;

9 is a flow chart showing the flow of protocol data transmitted between systems when performing a program download according to the present invention.

<Description of the symbols for the main parts of the drawings>

410: HDT 420, 430, 440, 450, 460: ONU

610: NMS 620: MCU in HDT

640, 650: MCU 710 in ONU: ATM cell bus frame

720: Download request PDU 730: Response PDU

Hereinafter, with reference to the accompanying drawings, the present invention will be described in more detail.

4 is a block diagram illustrating a connection relationship between an HDT and an ONU of a subscriber transmission device using an asynchronous transmission method. Referring to FIG. 4, the central control unit of the subscriber transmission device using an asynchronous transmission method, that is, the HDT 410 is a site. Eight connection boards (OLIU # 1: Optical Line Interface Unit # 1,…, OLIU # 8) connected to each remote control device and a control unit (MCU) for controlling the eight connection boards, and each connection The boards transmit control signals transmitted from the control unit of the HDT 410 to remote control devices located at an arbitrary site, receive response signals from the remote control devices, and transmit the control signals to the control unit of the HDT 410.

In addition, the remote control device, that is, the ONU (Optical Network Unit) stores a control signal transmitted through the connection board of the HDT 410, the controller (OMCU) for controlling each subscriber, and subscriber boards (ONIU, ADSL, E1, ...).

At this time, up to 14 remote control devices ONU may be connected to each of the connection boards OLIU # 1,..., OLIU # 8 of the HDT 410. In FIG. 4, the first connection board OLIU # 1) Two remote control devices (ONU # 11, ONU # 12) (420, 430) are connected, and the eighth connection board (OLIU # 8) has three remote control devices (ONU # 81, ONU # 82, ONU # 83) (440, 450, 460) is connected.

On the other hand, each of the HDT 410 and ONUs (420, ...) having such a hardware configuration has a structure for transmitting and receiving a control signal by the ATM cell bus, the internal configuration and interconnection relationship of these HDT and ONU Is shown in.

FIG. 5 is a block diagram showing the internal configuration and interconnection relationship between the HDT and the ONU of the subscriber transmission apparatus using the asynchronous transmission method. Referring to FIG. 5, the HDT 410 and the ONUs 420 and 430 are each board. Tag information (TAG) is used for identification between the two devices, and information exchange is performed using an ATM cell bus between internal devices.

First, in the case of the HDT 410, the tag of the control unit (MCU) 411 is set to '1', the tag of the first connection board (OLIU # 1) 413 is set to '2', and In order to increase the tag number, set the tag to '9' in the case of the eighth connection board (OLIU # 8) 415, which is the last connection board.

This tag setting rule is the same for the ONUs 420 and 430. The tag of the controller (OMCU) 421 and 431 is set to '1', and the tag of the first subscriber board ONIUs 423 and 433 is set. Is set to '2', and the tag number is set up to the last subscriber board by increasing the tag number in that order.

Accordingly, when the HDT 410 wants to download a control command or a control program transmitted from the network management system to the ONUs 420 and 430 which are lower levels, first, the HDT 410 is identified by the tag number in the HDT 410. Select the relevant connection board, select an ONU to be downloaded from a plurality of ONUs connected through the connection board, and then, in the ONU where the program to be downloaded is stored by the tag number in the ONU 420 or 430 Select the control.

At this time, in the present invention, in order to upgrade all the corresponding programs at the same time by only one download, when the control command or control program occurs in the network management system, when generating the ATM cell bus generated in the initial stage of downloading, the HDT By selecting all the connection boards in 410, selecting all the ONUs connected to each of the connection boards, and then selecting the first board of the ONU, thereby simultaneously selecting the control units of all the ONUs to be downloaded.

The ATM cell bus is based on ATM standard I.361, the configuration of which is shown in FIG. 7A. Referring to FIG. 7A, the ATM cell bus frame 710 is a destination, that is, ATM, on an ATM cell bus in the HDT. An 8-bit TAG region 711 that designates a connection board to which a cell bus frame is to be transmitted, and a 4-bit selector that selects a device to which the ATM cell bus frame is transmitted from among ONUs connected to the connection board designated in the TAG region 711. 8-bit VPI region 713 for setting the GFC region 712, the region in which the ATM cell bus frame is to be transmitted among the boards in the ONU selected in the GFC region 712, and 16 for selecting the on-board ATM channel. A VCI region 714 of bits, a 4-bit PTI 715 region indicating payload type or characteristics of the ATM cell, an 8-bit HEC region 716 for error detection and ATM synchronization, and user information. Consists of 48-byte Cell Body Region 717, including The.

In this case, the TAG region 711 designates a tag value in the HDT to designate a connection board on which an ATM cell bus frame is to be transmitted on an ATM cell bus in an HDT, and sets the value in order to designate a control unit in the HDT. Set to '0x01', set the value to '0x02 ~ 0x08' to specify the first to eighth OLIU connection boards, and set the value to '0xFF' to select all OLIU connection boards in the HDT. do.

In addition, the GFC area 712 is a sequence number when the ONU connected to each connection board in the HDT is selected to select a device to which the ATM cell bus frame is transmitted among the ONUs connected to the connection board designated in the TAG area 711. As a result, the value is set to '0x1 to 0xE', and when all ONUs connected to the connection board are selected, the value is set to '0xF'.

The VPI area 713 is a part for setting the area in which the ATM cell bus frame is to be transmitted among the boards in the ONU selected in the GFC area 712. In the case of a control command or control program generated in a network management system, a control part in the ONU It should be transmitted as, so set the value as '0x1'.

Accordingly, in order to simultaneously broadcast a control command or control program generated from a network management system to all remote control devices, the TAG region 711 is set to '0xFF' and the GFC region 712 is set to '0xF'. After that, the TPI region 713 is set to '0x1'.

6 is an internal block diagram of a subscriber transmission apparatus for performing a program download according to the present invention. Referring to FIG. 6, an internal block of the subscriber transmission apparatus for performing a program download according to the present invention will be described below.

First, the network management system (NMS) 610, when a program and a control command to download from the network management system (NMS) 610 is generated, the program download processing unit 611 for generating protocol data for downloading the program And a network processing unit 612 for transmitting the processing result to the main control unit (MCU) 620 in the central control unit (HDT), and the main control unit (MCU) 620 in the central control unit (HDT). The network processing unit 621 which performs data transmission and reception with the network processing unit 612 of the network management system (NMS) 610, and processes the program downloaded through the network processing unit 612 and stores it in its own memory 623. A program download processor 622 and an IPC (Inter Process Control) processor 624 which performs control for transmitting the downloaded program to main controllers (OMCU) 640 and 650 of the corresponding remote control device (ONU). It consists of.

On the other hand, the main controller (OMCU) (640, 650) of the remote control unit (ONU) is the IPC processing unit (641, 651) for performing data transmission and reception with the IPC processing unit 624 in the central control unit (HDT), and the IPC And a program download processor 642 and 652 for processing a program downloaded through the processor 641 and 651 and storing the program downloaded in the own memory 643 and 653.

In addition, when the program download is completed by the above configuration, the contents stored in the memory 623 built in the main control unit 620 of the HDT is stored in the FROM 630 which is an external storage means of the HDT, and the ONU The contents stored in the memory (643, 653) of the main control unit (640, 650) of the is stored in the FROM (660, 670) which is an external storage means of the ONU.

8 is a flowchart illustrating a method of performing a program download according to the present invention. Referring to FIG. 8, a method of performing a program download according to the present invention will be described below.

First, when a program download command is generated by the network management system (NMS) operator (s805), a download request protocol data (PDU: Protocol Data Unit) is generated with the program information to be downloaded from the network management system (NMS) (s810). ), And transmits the download request PDU to the central control unit (HDT) (s815).

Then, the central control unit (HDT) generates an ATM cell bus frame with reference to the download request PDU (s820), and then broadcasts the download request PDU to the remote control unit (ONU) using the ATM cell bus frame. Cast (s825).

At this time, the generated ATM cell bus frame is as shown in FIG. 7A. In order to broadcast the download request PDU, the destination information area in the ATM cell bus frame is set to all remote control devices. The setting method is as shown in the explanation parts (p. 10 to p. 11) with reference to FIG. 7A.

After receiving the download request PDU from the central control unit HDT in step S825, the remote control device ONU analyzes the download request PDU and generates response protocol data PDU according to the analysis result (S830). And transmits to the central control unit (HDT) (s835).

In this case, if the download result is 'download start' or 'download end', the response PDU indicates that the download is normally performed and transmits the result to the central control unit (HDT), and the download result is 'downloading'. ', The program download status is re-evaluated, and the corresponding process is performed.

That is, when the program download state is 'normal', the response PDU indicates that the download is normally performed, transmits the result to the central control unit (HDT), and stores the downloaded program in the internal memory, and the program download state is the program. If the error is 'sequential', the response PDU is indicated to be retransmitted and transmitted to the central control unit (HDT). If the program download status is 'bad' due to a hardware error, the transmission is not possible to the response PDU. Is displayed and transmitted to the central control unit (HDT).

Then, the central control unit (HDT) receiving the response PDU transmits the received response PDU to the network management system (NMS) (s840), and the network management system (NMS) analyzes the received response PDU (s845). To perform the processing accordingly.

That is, if the download result of the analysis (s845) is normal, it is checked whether the download of the entire program is completed (s855). If the download of the entire program is completed, the download procedure is terminated, and the download of the entire program is not completed. If not, return to the process of generating a download request PDU in the network management system (S810), generate a new download request PDU for the program, and then repeat the process until the download is completed.

On the other hand, if the result of the analysis (s845) is a bad download result and the remote control device (ONU) requests a retransmission (s860), the network management system returns to the process of generating a download request PDU (s810) and the currently downloaded program After re-creating a new download request PDU for, repeat the following process.

Then, when the download result is poor and the remote control device ONU determines that the transmission is impossible (at the No branch of S860), the download is terminated.

The configuration of protocol data transmitted between the central control unit (HDT) and the remote control unit (ONU) when performing the program download is shown in FIGS. 7B and 7C.

FIG. 7B is a diagram illustrating a download request PDU transmitted from the central control unit (HDT) to a remote control unit (ONU). Referring to FIG. 7B, the download request PDU 720 has a total length of 1536 bytes. And a program area (PGM) 728 of 1500 bytes for storing the program to be downloaded in a predetermined length, and header areas 721 to 727 including the header information, wherein the header area identifies a 4-byte message. Area (MSG_ID) 721, an eight-byte first destination information storage area (DEST_INFO) 722, an eight-byte second destination information storage area (SRC_INFO) 723, and a four-byte system identification area ( NMS_ID) 724, 4-byte sequence storage area (SEQ_No.) 725, 4-byte download type storage area (PGM_DOWN_ACTION_TYPE) 726, and 4-byte length information storage area (DOWN_L) 727 It consists of.

The message identification area (MSG_ID) 721 is an area for storing message identification data indicating that the current message is a download request PDU, and stores a decimal number '1100' and stores the first destination information storage area (DEST_INFO) ( 722 is an area for storing the information on the remote control device (ONU) to be transmitted to the program to be downloaded, the system number of the remote control device (ONU) is stored in the upper 4 bytes, the remote control device (ONU) in the lower 4 bytes Information stored in the program download processing unit ('642' and '652' of FIG. 6) is stored.

The second destination information storage area (SRC_INFO) 723 is an area for storing central control device (HDT) information to which a program to be downloaded is to be transmitted. The system number of the central control device (HDT) is stored in the upper 4 bytes. In the lower 4 bytes, information designating the network processing unit ('621' in FIG. 6) in the central control unit HDT is stored.

The system identification area (NMS_ID) 724 is an area for storing network management system (NMS) information for generating the download request PDU, and when there are several network management systems (NMS) installed in a telephone station, the download request PDU Specifies the NMS that generated the.

The sequence number storage area (SEQ_No.) 725 is an area for storing the sequence number of programs stored in the program area. In the present invention, the entire program to be downloaded is divided and transmitted by 1500 bytes. In order to correctly know the value, the value starts at '0' at the beginning of the program download and increases by '1' each time the download request PDU is delivered once.

The download type storage area (PGM_DOWN_ACTION_TYPE) 726 is an area for storing a download type, and designates and transmits one type of a program download start, download in progress, or end of download. The length information storage area DOWN_L 727 stores the size of program information actually stored in the program area.

On the other hand, Figure 7c is a configuration diagram for the response PDU transmitted from the remote control unit (ONU) to the central control unit (HDT), referring to Figure 7c, the response PDU 730 has a total length of 28 bytes 4 bytes of message identification area (MSG_ID) 731, 8 bytes of destination information storage area (DEST_INFO) 732, 8 bytes of source information storage area (SRC_INFO) 733, and 4 bytes of system identification Area (NMS_ID) 734 and a download result storage area of 4 bytes.

The message identification area (MSG_ID) 731 is an area for storing message identification data indicating that the current message is a response PDU, the decimal number '2100' is stored, the destination information storage area (DEST_INFO) 732 is An area for storing information of the central control unit (HDT) to which the response PDU is to be transmitted, wherein the system number of the central control unit (HDT) is stored in the upper 4 bytes, and in the central control unit (HDT) in the lower 4 bytes. Information specifying the installed network processing unit ('621' in FIG. 6) is stored.

On the other hand, the source information storage area (SRC_INFO) 733 is an area for storing the remote control device (ONU) information for generating the response PDU, the system number of the remote control device (ONU) is stored in the upper 4 bytes. The lower 4 bytes store information specifying the program download processing unit ('642' and '652' in FIG. 6) installed in the remote control device ONU, and the system identification area NMS_ID 734 responds to the response. An area for storing network management system (NMS) information to which a PDU is transmitted. If there are several network management systems (NMS) installed in a telephone station, the network management system (NMS) is designated.

The download result storage area (PGM_DOWN_ACTION_RESULT) 735 is an area for storing a download result of a program included in the download request protocol data, and analyzes the download request protocol data received by the remote control device ONU. , Save the result.

That is, if the value of the download result storage area (PGM_DOWN_ACTION_RESULT) 735 is 'PROGRAM_DOWNLOAD_OK', the download status is 'normal', indicating that the received download request PDU has been processed normally, and the download result storage area 735 If the value of is 'PROGRAM_DOWNLOAD_FAIL', the download status is 'bad', and the program download status is 'bad' due to a hardware error or 'bad' due to an unsolvable problem, indicating that it is impossible to proceed later. Meanwhile, when the value of the download result storage area 735 is 'PROGRAM_DOWNLOAD_ RETRANSMIT', it means an error that occurs because the value of the program sequence number area of the received download request PDU does not increase sequentially, so that the program must be retransmitted. Inform them.

9 is a flowchart illustrating the flow of protocol data transmitted between systems when a program download is performed according to the present invention. The network management system (NMS) 610 and the central control apparatus for program download according to the present invention are shown in FIG. Indicates the flow of the download request PDU and the response PDU transmitted between the main control unit (HDT_MCU) 620 and the main control unit (ONU_MCU) 640 of the remote control device. In particular, the download start process (s910) and the download progress process (s920). The retransmission process (s930) at the request of the remote control device in case of a download error, the transmission end process (s940) at the request of the remote control device in the case of a download error, and the normal download end process (s950) are shown.

First, referring to a download initiation process (s910), when the NMS 610 transmits (s911) a 'DOWNLOAD_START' signal to the HDT_MCU 620 through the download request PDU to perform a program download, the HDT_MCU 620 ) Transmits the 'DOWNLOAD_ START' signal to the ONU_MCU 640 (s912), receives the 'DOWNLOAD_START_RESPONSE' signal through the response PDU generated in the ONU_MCU 640 (s913), and transmits the signal to the NMS 610.

As described above, when the response to the start of download is correctly transmitted from the ONU_MCU 640, the NMS 610 starts to download the program. At this time, the NMS 610 transmits the program in units of 20 download request PDUs. As shown in the download process (s920), when the NMS 610 transmits the program by the 20 download request PDUs (PGM_DOWNLOAD_ # 1 to # 20) (s921), the HDT_MCU 620 transmits the program information. Transmit to the ONU_MCU 640 (PGM_DOWNLOAD_ # 1 ~ # 20) (s922), and in the ONU_MCU 640 to inform that the download is normal when the transmission state is normal, the 'DOWNLOAD_OK' signal through the response PDU to the HDT_MCU ( It transmits to the NMS 610 via 620 (s923 and s924).

Meanwhile, referring to the retransmission process of FIG. 9 (s930), the NMS 610 transmits # 21 program from # 21 program to # 40 program by 20 download request PDUs (PGM_DOWNLOAD_ # 21 to # 40) (s931). When the HDT_MCU 620 receives the signals PGM_DOWNLOAD_ # 21 to # 40 and transmits the signals to the ONU_MCU 640, the ONU_MCU 640 checks the program sequence number and outputs the result message.

However, if the sequence number error occurs in the n-th program as a result of the check, the ONU_MCU 640 generates a message (DOWNLOAD_RETRANSMIT_ # n) for transmitting the program group to which the n-th program belongs again and the NMS ( 610, s933 and s934.

Then, in receiving the message, the NMS 610 receives the program group to which the nth program belongs, that is, the program group PGM_DOWNLOAD_ # 21 to # 40 including the 21st to 40th programs through the HDT_MCU 620. Resend (s935, s936) to the ONU_MCU 640, and receives a message (DOWNLOAD_OK) indicating that the download has been successfully processed from the ONU_MCU 640 through the HDT_MCU (620) (s937, s938), the program group Terminate the transmission.

In addition, referring to the transmission termination process (s940) at the request of the remote control device in case of a download error, the NMS 610 passes the # 41th program to the # 60th program to the ONU_MCU 640 via the HDT_MCU 620. As a result of performing verification for each program in the ONU_MCU 640 which transmits (PGM_DOWNLOAD_ # 41 to # 60) (s941, s942) and receives the program group, a fatal defect, that is, a hardware defect, in any part of the program is performed. However, when a defect that cannot be self-processing occurs, the ONU_MCU 640 carries information (PGM_DOWNLOAD_FAIL) that is no longer downloadable in the response PDU and transmits the information to the NMS 610 via the HDT_MCU 620 (s943 and s944). do.

If, as a result of performing a series of processes as described above, if the download for the program is normally terminated, information indicating that the download is normally completed in the download request PDU generated by the NMS 610 as shown in the download termination process (s950). After transmitting (DOWNLOAD_END) to the ONU_MCU 640 via the HDT_MCU 620 (s951, s952), if a response message (DOWNLOAD_END_RESPONSE) is received through the HDT_MCU 620 from the receiving ONU_MCU 640 side, Ends the program download process.

The program download method of the subscriber transmission device as described above is to download a control command or control programs generated in the network management system to a remote control device to upgrade a program installed at an arbitrary site. By designating and downloading all control devices that perform the same function at the same time, the programs of all sites can be simultaneously upgraded by a single download. Therefore, there is an advantage that the program download time can be shortened compared to the conventional method.

Claims (7)

A network control system installed in a telephone station, a plurality of remote control devices for managing subscriber information of each site group, and a central control device for transmitting control commands or control programs generated by the network management system to the remote control device. In the program download method of the configured subscriber transmission device, When a program download command is generated by a network management system operator, a first process of generating a download request protocol data with the program information to be downloaded from the network management system and transmitting it to the central control apparatus; Generating an ATM cell bus frame in the central control unit, and broadcasting the download request protocol data to the remote control apparatus by loading the download request protocol data on the ATM cell bus frame; A third step of analyzing, by the remote controller, the download request protocol data received from the central controller, generating response protocol data according to the analysis result and transmitting the response protocol data to the central controller; Transmitting, by the central control apparatus, response protocol data received from a remote control apparatus to the network management system; And a fifth process of the network management system analyzing the response protocol data and performing a corresponding process. The method of claim 1, wherein the download request protocol data is A program area for dividing and storing the program to be downloaded into a predetermined length; It consists of a header area containing the header information, The header area is A message identification area for storing message identification data; A first destination information storage area storing information of a remote control device to which the program to be downloaded is to be transmitted; A second destination information storage area storing central control device information to which the program to be downloaded is to be transmitted; A system identification area for storing network management system information for generating the download request protocol data; A sequence number storage area for storing sequence numbers of programs stored in the program area; A download type storage area for storing a download type such as download start, downloading, or end of download; And a length information storage area for storing the length of program information stored in the program area. The method of claim 1, wherein the second process is And setting the destination information area in the ATM cell bus frame to all remote control devices so that the ATM cell bus frame is broadcast. The method of claim 1, wherein the response protocol data is A message identification area for storing message identification data; A destination information storage area for storing central control device information to which the response protocol data is to be transmitted; A source information storage area for storing remote control device information generating the response protocol data; A system identification area for storing network management system information for transmitting the response protocol data; And a download result storage area for storing a download result of a program included in the download request protocol data. The method of claim 1 or 4, wherein the third process Analysis result of the download request protocol data, when the download type is 'download start' or 'download end' And displaying the 'normal state' in the download result storage area of the response protocol data and transmitting the response protocol data to the central control device. The method of claim 1 or 4, wherein the third process As a result of the analysis of the download request protocol data, if the download type is 'downloading', the program download status is determined. If the program download state is 'normal', the 'normal' state is displayed in the download result storage area of the response protocol data, the response protocol data is transmitted to the central controller, and then the downloaded program is stored in the internal memory. , If the program download status is 'poor' due to program sequence error, a 'retransmission' status is displayed in the download result storage area of the response protocol data, and the response protocol data is transmitted to the central control apparatus. If the program download state is 'bad' due to a hardware error, the subscriber transmission characterized by displaying a 'transmission impossible' state in the download result storage area of the response protocol data and transmitting the response protocol data to the central control device. How to download the program on your device. The method of claim 1, wherein the fifth process Analysis of the response protocol data; If the download result is normal, the next download request protocol data is sent sequentially. If the remote control device requests retransmission due to poor download result, retransmit the previous download request protocol data, And if the remote control device determines that the transmission is impossible due to a poor download result, downloading is terminated.