JPH0331309B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a signal station code change control method, particularly when changing the signal station code of a signal station in a communication network that uses a so-called high-level transmission control procedure or a common line signaling system. The present invention relates to a signal station code change control method that temporarily allocates old and new signal station codes and makes it possible to change the signal station code without affecting the currently used signal stations and signal networks.

[Conventional technology and problems]

Generally, building a communication network requires a long period of time, and therefore various problems may occur during the growth process of the communication network. FIGS. 8 to 10 are diagrams for explaining the technical background and problems with the conventional method.

In FIG. 8, 1A to 1D represent signaling points (SP), 2 represents a signaling network, and 3 represents communication data. A signaling point code (SPC), which is an identifier for identifying each signaling station, is assigned in advance to the signaling stations 1A to 1D. In the example shown in FIG. 8, the signal station 1A
has “a” as the signal station code, and signal station 1
D is assigned a signal station code of "d". For example, when transmitting communication data 3 from signal station 1A to signal station 1D, in the common line signaling method,
The signal station code d of the receiving station and the signal station code a of the originating station are set in the communication data 3, and the signal stations 1B to 1C in the signal network 2 use the signal station code d and the signal station code The communication data 3 is relayed with reference to a.

Each of the signal stations 1A to 1D has a signal station code registration table 4 as shown in FIG. 9, for example. The code is now registered. When transmitting and receiving communication data 3, a necessary signal station code is obtained by searching a signal station code registration table 4. Note that 4A is an identification information setting area for the own station or another station.

By the way, during the growth process of the signal network 2, it may occur that the initially assigned signal station code must be changed. Furthermore, it may be necessary to temporarily allocate a temporary signal station code for testing or the like. However, in such cases, since the signaling network is made up of multiple nodes (signaling stations), it is extremely difficult for network operations to simultaneously change to a new signaling station code in all involved signaling stations. .

Therefore, as shown in FIG. 10, for example, the code of the signal station 1D is changed from "d" to "d'", while the code of the signal station 1A is not yet registered in the signal station code registration table 4. If it is not reflected, the communication data 3 having "d" as the destination station code will disappear within the signal network 2 because the destination is unknown. That is, according to the conventional method,
When changing the signal station code, either stop the communication function of the signal network 2 all at once and update the signal station code registration table 4 for each station at the same time, or give up on losing communication data during the update transition period. There was a problem that I had no choice but to do.

[Means for solving problems]

The present invention aims to solve the above problems, and when changing the signal station code of a signal station in the common line signaling system, temporarily assigns a double signal station code to the signal station and signal network currently in use. It is possible to change the signal station code without affecting the system. Therefore, in the signal station code change control method of the present invention, in a communication network consisting of a plurality of signal stations that communicate by including the identification information of the transmitting station and the identification information of the receiving station in the communication information, each of the above-mentioned signal stations is is provided with a signal station code registration table in which each signal station code information of each signal station is stored, and the signal station code registration table stores at least the old signal station code and the new signal station code corresponding to each signal station code entry. Each signal station has identification information indicating whether or not both are valid, and each signal station is provided with means for dually registering the old signal station code and the new signal station code in the signal station code registration table, and When the identification information in the station code registration table indicates that both the old signal station code and the new signal station code are valid, the above signal station code registration table is used when editing communication messages, routing, and searching for signal station codes when receiving calls. The feature is that both the old and new signal station codes are used together.

[Effect]

Before explaining one embodiment of the present invention, the operation of the present invention will be explained according to the example shown in FIG.

In FIG. 2, it is assumed that the signal station code (SPC) of the signal station 1D needs to be changed from "d" to "d'". In the case of the present invention, instead of immediately updating the signal station code registration table, the original old SPC "d" and the new SPC after the change "d'" are both valid, and each It will be used together at signal stations. That is, during a transitional period, the signal station 1D has a new/old SPC and is able to receive communication data destined for itself whether it is the old SPC or the new SPC. Therefore, for example, signal station 1
If A specifies the old SPC in communication data 3A and edits the message, while signal station 1B specifies the new SPC and edits the message, signal station 1D:
Compatible with both signal station codes. As a result, each signal station composing the signal network 2 can freely change to a new signal station code, and it becomes possible to provide flexibility in the operation of the signal network 2.

〔Example〕

FIG. 1 is a block diagram of a main part of an embodiment of the present invention, FIG. 3 is a diagram for explaining an overview of control according to an embodiment of the present invention, and FIG. 4 is a system configuration of a signal station to which the present invention is applied. For example, FIG. 5 is an explanatory diagram of the process when a message is sent, FIG. 6 is an explanatory diagram of the process when a message is received, and FIG. 7 is a diagram for explaining the routing process.

In FIG. 1, 10 is a processor system device, 11 is a message transmission/reception control unit, 12 is a message editing unit that edits messages, 13 is a routing unit that performs routing for relaying messages, and 14 is a message editing unit that edits messages.
is a message receiving unit that receives messages; 15;
16 is a signal station code registration unit that processes the registration of additions and changes to signal station codes; 17 is a signal station code registration table; and 18 is a local station code registration table. ,
19 represents a new and old code registration table.

When sending a message to another station, the message editing section 12 refers to the signal station code registration table 17 and the own station code registration table 18, and inputs the signal station code of the other party as the called station code (DPC). Incorporate the transmitting station code of the own station into the communication data as the office code (OPC). In the example shown in FIG. 1, the signal station codes are registered in a signal station code registration table 17 in which signals from other stations are registered, and a local station code registration table 18 in which signals from the own station are registered. Although these are provided separately, they may be provided as the same conceptual registration table.

The message receiving unit 14 compares the DPC in the received communication data with the information obtained from the own station code registration table 18, and if the communication data is addressed to the own station, starts the message processing unit 15. and executes the processing requested by the message, and if the message is addressed to another station, starts the routing section 13,
Executes relay processing to transfer communication data to other stations.

Each entry in the signal station code registration table 17 or the local station code registration table 18 is provided with an identification display section I, in which information held by the entry is displayed.
Information on whether it is an SPC or address information to the old and new code registration table 19, and the new SPC
Usage permission information and the like are now set using, for example, flags. Identification display part I
indicates the address information to the old and new code registration table 19, indicating that the new SPC is permitted to use, this state is a transitional state when the signal station code is changed, and Old SPC before change registered in 19 and new SPC after change
and are both valid. When the identification display section I does not indicate that it has address information for the old and new code registration table 19, the handling of the SPC can be considered to be the same as before.

In response to a local or remote signal station code change request, the signal station code registration unit 16 first secures an area for the old and new code registration table 19 in memory, and stores the SPC before the change in the secured new and old code registration table 19. and the changed SPC. Next, signal station code registration table 17 or own station code registration table 18
As the entry contents, the address to the old and new code registration table 19 is set, and the identification display section I displays that the old and new SPCs can be used together. Thereafter, when all signal stations in the network begin to use only the new SPC and it is no longer necessary to use the old and new SPCs together in a transitional state, the following processing is performed.

Obtain the new SPC from the old and new code registration table 19, signal station code registration table 17 or own station code registration table 18
A new SPC is set in place of the address information in the old and new code registration table 19 in . Then, the identification display section I is updated to indicate that the entry directly holds the SPC. Thereafter, the area of the old and new code registration table 19 that is no longer needed is released.

FIG. 3 shows a modeled signal network. For example, a message originating from signal station 1A and arriving at signal station 1F includes 1A-1B-1C-1F, etc.
They arrive at the signal station 1F through several routes according to predetermined rules, but for the sake of simplicity,
Messages originating from (arriving at) signal station 1A and arriving at (from) signal station 1F are 1A-1B-1C-1F and 1A-1D.
-1E-1F shall be limited to two routes.

In this signal network, for example, when changing the SPC of the signal station 1A from "10" to "25", control is performed as follows. In the signal station 1A, a new and old code registration table 19 is added to the various own station code registration tables 18,
Add new SPC "25". Then, while the old SPC "10" is in a state where messages can be handled, the new SPC "25" is additionally registered in the same way at signal stations other than the signal station 1A. If the above-mentioned measures are completed on route 1A-1B-1C-1F, each signal station will be permitted to use the new SPC information. During the procedure for permission to use the new SPC information, 1A-1D-1E-1F
Messages originating from signal station 1A and arriving at signal station 1F will be sent along this route.

FIG. 4 shows an example of a switching system configuration as an example of a signal station based on the common line signaling system to which the present invention is applied. Reference numeral 31 in the figure is a telephone network;
2 is a call processing processor, 33 is a memory, 34 is a file memory, 35 is a channel, 36 is a channel adapter, 37 is a main processor, 3
8 is memory, 39 is channel, 40 is file.
Memory control device, 41, file memory, 42
is a typewriter control device, 43 is a typewriter,
44 is a magnetic tape control device, 45 is a magnetic tape device, 46 is a line printer control device, 47 is a line printer, 48 is a terminal control device, and 49 is a display device. Also, the symbol shown on the left side of the illustration
CPR is a call processor system, MPR is a main processor system.
Each represents a processor system.

The configuration shown in Figure 4 is a so-called distributed control digital switching system, in which each call network that connects subscriber telephones, subscribers and trunks, etc. is modularized and divided for control. It is something. Each call network 31 is controlled by a call processing processor 32, and under the control of the call processing processor 32, a memory 33, a channel 35, and a file memory 34 are connected to form one unit system. There is. When an exchange connection is to be made across another call network 31, an interface between call processing processors is established via a channel adapter 36 and a main processor 37. It may be considered that the signal station code is changed in response to a request from an input device such as the typewriter 43, for example. Here, the signal station code uses a common line signal system that is exchanged on a line independent of the telephone line and data line in the line between the outgoing stations, as well as a control channel within the data line, etc.
It may also be transmitted together with other data.

When sending a message, the message editing section 12 shown in FIG. 1 edits the message regarding information regarding routing, as shown in FIG. 5, for example.

First, in the process 51 shown in FIG. 5, the identification display section I of the own station code registration table 18 is referred to, and it is determined whether a new SPC can be used as the originating station code (OPC). If it cannot be used, in step 52, the entry of the destination SPC in the signal station code registration table 17 is referred to, and it is determined whether a new SPC can be used as the terminating station code (DPC).
Regarding the DPC, if the use of the new SPC is not permitted, the old SPC is used as the OPC and DPC, respectively, in process 53.

If it is recognized in the judgment in process 51 that the new SPC can be used, then in process 55,
Determine whether the new SPC can be used as the DPC. If it is not available, OPC will use new SPC,
DPC uses old SPC. If available,
Both OPC and DPC use the new SPC.

When receiving a message, the message receiving section 14 shown in FIG. 1 processes information regarding routing, as shown in FIG. 6, for example.

When a message is received, first, the DPC of the received message is determined by the process 60 shown in FIG.
Determine whether it is an SPC. If it is your own station's SPC, the message processing unit in your own station is activated because the incoming message is addressed to your own station. own station's
When the SPC is not indicated, by referring to the identification display part I of the own station code registration table 18 in process 61, it is determined that the own station SPC is currently in the new/old SPC combination state and is using the new SPC. Determine whether it is possible.

If the new SPC cannot be used, rerouting will be performed using the old SPC. If the new SPC can be used,
In process 62, it is determined whether the DPC of the received message is equal to the new SPC of the local station, and if they are equal, the message is determined to be an incoming message. If they are not equal, rerouting is performed using the new SPC for relaying.

For example, message routing is performed as follows. FIG. 7A conceptually shows the acquisition of routing information regarding routing. That is, it can be considered that the routing status of the message sending route, link, corresponding hardware, etc. is determined by a vector that is a combination of OPC and DPC, as shown in FIG. 7A. Note that the combination of OPC and DPC does not use the signal station code (SPC) and all bits, but actually selectively combines internal fields within the SPC.

A more detailed explanation is as follows. The route along which the message is to be sent is determined by a so-called link set and the signaling links therein, as shown in FIG. From OPC and DPC,
Specifically, when requesting equipment information, etc., first use OPC.
The outgoing link set is determined by the combination of and DPC. For this purpose, as shown in FIG. 7C, the OPC
Using the pointer information from the entry whose displacement is as the start address, add the displacement corresponding to DPC,
Get the outgoing link set x.

Next, in order to obtain a signal link from the obtained outgoing link set x, the corresponding signal link y is obtained from the position where the outgoing link set x is the displacement in the signal link conversion table 72 shown in FIG. . Based on this signal link y, the device number conversion table 73 is searched to obtain specific device information such as the corresponding device number.

By the way, regarding this kind of routing,
When changing the SPC, there is basically no need to change the signal link conversion table 72 and device number conversion table 73 shown in FIG.
All that is required is to change the set conversion table 71.
By adding an intermediate table for dual registration, such as the old and new code registration table 19 shown in FIG. 1, to the outgoing link set conversion table 71, it is possible to use the new code and the old code in the same way.

〔Effect of the invention〕

As explained above, according to the present invention, when it becomes necessary to change the signal station code in the process of developing the signal network, or when it becomes necessary to allocate a temporary signal station code for testing, etc. It becomes possible to change the signal station code without affecting each signal station and the signal network in any way. Therefore, it becomes possible to provide significant flexibility in the operation of the signal network.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a main part of an embodiment of the present invention, FIG. 2 is a diagram for explaining the operation of the present invention, and FIG. 3 is a diagram for explaining an outline of control according to an embodiment of the present invention. Fig. 4 is an example of a system configuration of a signal station to which the present invention is applied, Fig. 5 is an explanatory diagram of processing when sending a message, Fig. 6 is an explanatory diagram of processing when receiving a message, and Fig. 7 is an explanation of routing processing. Figures 8 through 10 are diagrams for explaining the technical background and problems with the conventional method. In the figure, 1A, 1B... are signal stations, 2 is a signal network, 3
is communication data, 10 is a main processor system device, 11 is a message transmission/reception control unit, 12 is a message editing unit, 13 is a routing unit that performs routing, 14 is a message reception unit, 15 is a message processing unit, and 16 is a signal station code. Registration unit, 17 is signal station code registration table, 18 is own station code registration table, 1
9 represents the old and new code registration table.

Claims (1)

[Claims] 1. In a communication network consisting of a plurality of signal stations that communicate by including the identification information of the transmitting station and the identification information of the receiving station in the communication information, each of the above-mentioned signal stations stores the code information of each signal station of the signal station in the network. The signal station code registration table includes identification information corresponding to each signal station code entry indicating whether at least both the old signal station code and the new signal station code are valid. and each of the above signal stations is
Equipped with means for dually registering the old signal station code and new signal station code in the above signal station code registration table, so that the identification information in the above signal station code registration table is valid for both the old signal station code and the new signal station code. A signal station code change control method characterized in that both the old and new signal station codes in the signal station code registration table are used together in the editing and routing of communication messages and in searching for the signal station code at the time of receiving a call. .