JPS5832814B2 - Centralized maintenance method by network management center - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for program loading and changing program memory contents of a switching center in a packet switched network.

Loading a program or changing the program memory of a conversion station that operates using the conventional storage program method is
It was executed by the station's maintenance personnel using input/output equipment installed within the station.

Therefore, it was necessary to install input/output equipment at each station and to station maintenance personnel.

According to the conventional method, when constructing a packet switching network, the cost of each switching center becomes a problem.

Additionally, it was necessary to transport program information to exchanges scattered throughout the country, which hindered automation.

SUMMARY OF THE INVENTION It is an object of the present invention to overcome the drawbacks of the prior art and to provide a centralized maintenance system for economical remote control of exchanges by a network management center.

In other words, it is possible to centrally and remotely control the loading of stored program control programs into exchanges, program changes, and maintenance from a network management center.

The present invention utilizes a two-layer protocol of a link-by-link transmission control procedure and a packet transmission procedure to transmit and receive information between a network management center and a switching center via a transmission path, and to connect a remote switching center from a network management center. It is characterized by having a control function.

An embodiment in which the present invention is applied to a packet switching network will be described below with reference to the drawings.

Although FIG. 1 shows the concept of hierarchical program processing with a network management center and two switching stations, and the signal sequence between each program, it is also possible to have a plurality of switching stations.

As a link-by-link transmission control procedure applied to links between a network management center and a switching center and between offices of a switching center, there is, for example, a high-level data transmission control procedure that is being standardized by the ISO.

FIG. 2 shows an example of the format of each signal when using the level data transmission control procedure.

In FIG. 1, a network management center 101, an exchange center AlO2
and the level data transmission control procedure processing programs 105, 105' and 105'' of the exchange B 103,
Frame bits 20L address bits 202 . It processes a control bit 203 and a frame check sequence 2050 bit sequence.

On the other hand, the packet transmission procedure processing program 104゜'104
' and 104'' is the initial program 204 in FIGS. This is the program to transfer.

The following high-level data transmission control procedure processing program io
The signals handled by the packet transmission procedure processing programs 104, 104', and 104" are called packets.

The procedure for loading a program into the switching center AlO2 adjacent to the network management center 101 will now be described.

The network management center 101 transmits the minimum necessary station program for transmitting program data to the switching station AlO2.
When a transmission request is made to the level data transmission control procedure processing program 105, the address bit 205 in FIG.
, the initial program load frame 106 is transferred to the exchange center AlO2 by adding special control bits as shown in control bits 203.

The exchange center AlO2 exchanges this frame 106 with λ102.
When received normally by the level transmission control procedure processing program 105', it is recognized from the address bit 202 that it is a frame to be processed by the own station, and then the initial program load frame 106 is transmitted from the control bit 203.
and storing the initial program 204 in a predetermined program area for subsequent reception.
After the storage is completed, the entry is handed over to the initial program and the initial program 2 is used as the packet transmission procedure program 104'.
The response frame 101 indicating that the reception of 04 has been completed is sent to the third
It is returned to the network management center 101 in the format shown in the figure.

The high-level transmission control procedure processing program of the network management center 101 identifies that the frame is a response frame to the initial program frame 106 by analyzing the address bits 202 and control bits 203 in the frame as shown in FIG. Then, the packet transmission procedure processing program 104 transmits the program to be transferred to the packet switching center AlO2 as a data packet 108.

The structure of the data packet 108 is managed by the packet transmission procedure program 104 as shown in FIG.
6, station address 407, packet format 408,
Transmission sequence number 409, reception sequence number 410
, packet data 411 of program data to be transferred
and high-level data transmission control procedure processing program 10.
Frame bits 201, address bits 202, control bits 203 . It consists of a frame check sequence 205.

Control bits 203 perform frame sequence number control and frame retransmission control.

When the exchange AlO2 normally receives this frame 108, control is transferred to the bucket L transmission control program 104', and the transmission sequence number 409 and reception sequence number 41 are
If 0 is normal, the packet data 411 is stored one by one in a predetermined program area, and the data packet 108 is stored at the same time.
A response packet 109 shown in FIG. 5 is returned to the network management center 104 to notify that the reception has been completed normally.

By repeating this data packet 108 and response packet 109, the entire program can be transferred to the exchange 102.

When the final data packet is identified by the packet transmission procedure processing program 104' of the switching center AlO2, the switching processing program is activated to start the packet switching operation.

Next, the switching center B10 which is not adjacent to the network management center 101
3 describes the procedure for loading the program.

First, the network management center 101 sends a data packet 108' to the switching center AIO2 adjacent to the switching center B103 in the same manner as described above.

The structure of this data bucket) 108' is as shown in FIG. 4, and information instructing the exchange B 103 to execute an initial program load is stored in packet data 411 in the figure.

After the exchange AlO2 analyzes this packet data 411,
The network management center 101 sends an initial program frame 106' to the exchange B from the high-level data transmission control procedure processing program 105' in exactly the same way as the exchange AIO2.

When the exchange AlO2 receives a response frame 107' indicating completion of reception of 106' from the exchange B103, the exchange A
lO2 is the response bucket shown in FIG. 5) 109' is sent to the network management center 101.

At this time, the station address 407 of the response bucket) 109' is set as the station address assigned to the exchange B103.

By doing this, the network management center 101 becomes the switching center B10.
Recognizing that the initial program loading to the exchange B 103 has been completed, the next program to be transferred to the exchange B 103 is sent to the exchange B 103 as a data packet 108''.

The structure of the data packet 108" is the same as the previous data packet 1.
08, as shown in FIG. 4, but the station address 407 is the address of exchange B103.

The exchange AlO2 which received 108'' operates as a packet relay station because the station address is not its own station, and relays and sends 108'' to the exchange B103.

When the exchange B103 normally receives the data packet 108'', it sends a reception completion response 109〃 to the network management center 101 via the exchange AIO2.

By repeating the transmission and reception of this data packet 108" and its response packet 109", the network management center 1
From 01 onwards, all programs can be transferred to the exchange B103.

Also, when changing specific program data or rewriting the memory contents of an exchange, the network management center sends the station address 407 and packet data 411 of the data packet shown in Figure 4 to the specified station as a memory rewriting command. This can be achieved by doing this.

As explained above, in the present invention, the following effects can be obtained since the network management center has added the function of loading a program to a remote station and changing the program memory.

(1) The exchange does not need to have an input/output device for program backup.

(2) Unattended maintenance of the exchange becomes possible.

(3) Therefore, the equipment design of the switching network can be made more economical.

[Brief explanation of the drawing]

FIG. 1 is a processing conceptual diagram showing an embodiment in which the present invention is applied to a packet switching network, and FIGS. 2 to 5 are format diagrams of transmission data. 101...Network management center, 102...
Packet switching center A, 103...Packet switching center B, 104°104', 104''...Packet transmission procedure processing program, 105, 105', 105
〃...No-level data transmission control procedure processing program, 106゜106'...Initial program load frame, 107゜107'...Response frame, 108... ...data packet, 10
8', 108", i09, 109', 109"...
...Response packet, 201...Frame bit, 202...Address bit, 203...
...Control bit, 204... River/initial program, 205... Frame check sequence, 406°-°-7 automatic identification bit, 407...
...Station address, 408 ...Packet format, 409°-°-transmission sequence number, 410
...-... Reception sequence number, 411...
packet data.

Claims (1)

[Claims] 1. In a packet-switched network, a network management center having a link-by-link transmission procedure processing program and a packet transmission procedure processing program is installed, and the network management center uses the link-by-link transmission procedure processing program to store program memory. An initial program as a packet transmission procedure processing program is transmitted to an adjacent device by adding a command instructing loading, and the adjacent device stores the received initial program in a predetermined program area and transfers the entry. Thereafter, the network management center transmits a packet containing program data to be transferred or information instructing a remote device to execute an initial program load to the adjacent device according to the packet transmission procedure processing program, and the adjacent device The packets transmitted from the network management center are analyzed according to the previously received and stored packet transmission procedure processing program, and if it is program data for the own device, it is stored one by one in a predetermined program area, while the data for other devices is If it is program data or information that instructs the execution of an initial program load, the network management center can relay the program data to another device using a packet transmission procedure or transmit the initial program to another device using a link-by-link transmission procedure. A centralized maintenance system by a network management center characterized by centrally and remotely controlling loading of program memory or modification of program memory of a remote device.