JP2515467B2 - Signal processing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trunk line signal processing system in a node system in an information exchange network having a plurality of different trunk line signaling systems.

[0002]

2. Description of the Related Art Conventionally, as a technique in this field, there is one described in, for example, "Research and Practical Report of The Institute of Electrical Communication, Vol. 31, No. 11 (1982), pp. 19-29". FIG. 4 is a system configuration diagram showing an arrangement of a trunk signal device in a time division switch, which is one of node systems in an information network, and is described in the above publication.

In FIG. 4, TSE is a device for processing various individual line signals, and CSE is a device for processing common line signals. The central processing unit is a device that controls the entire switching system, and performs call control processing and higher-level processing of various signal processing. As for the trunk signal system, various signal systems have been considered as the technology develops.
The common line signaling system is one of them, and the conventional signal processing device is provided for each trunk line. By using a more reliable and higher quality signal system called the 7 common line signal system, it is possible to use a signal path and a signal processing device common to many relay lines.

[0004]

However, in the above-mentioned conventional signal processing system, the relay signal device (TS
E) and two signal processing devices, the common line signaling device (CSE), are directly connected to the central processing unit device corresponding to the upper device via the SP bus and the data channel device (DCH), respectively, and are closely connected. It has an interface.

Therefore, the call control unit directly supports various signal processing methods, and the existing signal processing methods also have to be supported until the methods no longer exist in the network. Even when developing, there is a problem that it is necessary to always consider all existing signal processing methods when designing. The present invention eliminates the constraint when developing a new node system due to the existence of the various signal processing methods described above, thereby facilitating the design of the node system and renewing the equipment according to the transition of the times. It is an object of the present invention to provide a signal processing method that facilitates

[0006]

In order to solve the above problems, the present invention is directed to a signal processing method in a node system in an information exchange network in which a plurality of different relay line signaling systems exist, wherein the plurality of different relay systems are used. A line signal is connected, the relay line signal interface module having a conversion function for converting the relay line signal into a signal between modules unified in the node system, and the relay line signal interface module are provided independently of each other, A call control module having a unified inter-module signaling processing function in this node system is provided.

[0007]

According to the present invention, since the signal processing system is configured as described above, the transmission / reception of information between each module in the node system is performed by using the unified inter-module signal system, The communication is performed by using a plurality of different trunk line signal interface modules to perform conversion between the unified inter-module signaling system and the trunk line signaling system of the partner node system, and the trunk node signaling system of the partner node system.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a conceptual diagram showing a signal processing system according to an embodiment of the present invention. As shown in FIG. 1, the node system is composed of a plurality of modules such as a call control module 1, a trunk line signal interface module 2, and other modules 3 such as a packet processing module and a maintenance operation module. . Then, each module is provided with an M signal processing function (hatched portion M) for interfacing between the modules by a unified signal system called inter-module signal (hereinafter, abbreviated as M signal).

Next, consideration will be given to the processing of relay line signals. The processing of the trunk line signal can be divided into a signal protocol processing as a communication means for communicating with the opposite node system which is opposed via the trunk line, and a call control processing corresponding to the upper layer. In FIG. 1, the trunk line signal interface module 2 executes the former, and the call control module 1 executes the latter. During that time, the M signal is used for the interface. Therefore, it is necessary to have a function of converting various relay line signals (A signal to Z signal) accommodated in the relay line signal interface module 2 into M signals.

From the viewpoint of the call control module 1, it is not necessary to directly interface various relay line signals (A signal to Z signal) which are communication means with the opposite system, and information is relayed by using the M signal. When it is transmitted / received to / from No. 2, the relay line signal interface module 2 converts it into a corresponding relay line signal and communicates with the opposite node system.

FIG. 2 is a conceptual diagram showing a signal processing system according to another embodiment of the present invention, in which call control modules are load-balanced to m (m is an integer of 2 or more), and trunk line signal modules are used for common line signals. The functions are distributed to the module 2a and the individual line signal module 2b, and each of them has an inter-module coupling mechanism 4
It shows a case connected via. In FIG. 2, the inter-module coupling mechanism 4 is a coupling device that connects the modules when the system is started, and is transparent when viewed from the M signal.

FIG. 3 is an explanatory diagram showing a correspondence relationship between the functional blocks of the common line signal module and the respective functions of the protocol hierarchy of the M signal and the common line signal in another embodiment of the present invention. In FIG. 3, the M signal is realized by a combination of various CCITT international protocols, and lower layers below layer 2 are ATM protocols (Recommendations I. 361 to 363).
Is realized on the basis of the data transfer phase of the X25 protocol and ISCP in the upper layer 3 or higher. The common line signal is NO. 7
The case of a common line signal is shown. NO. 1 which is one of the relay line signals. 7 Signal conversion between common line signal and M signal is CP
It is done by software on the system. Note that the content of the protocol itself is not the subject of the present invention, and therefore its explanation is omitted.

The operation of FIG. 2 will be described below with reference to FIG. In FIG. 2, the call control modules ₁₁ to
1 _m and the common line signal module 2a are communicated by M signals. When the call control module needs to communicate with another station as a result of the call control process, it checks which trunk line signal interface module accommodates the other station, and communicates with the corresponding interface module based on the result. At this time, the call control module, without being aware of the signal system of the partner station and the trunk line signal,
It suffices to communicate with the corresponding interface module by using the M signal unified in the node system, and the information to be communicated by the corresponding interface module is communicated with the partner station by using the signaling system between partner stations.

For example, when the corresponding interface module is the common line signal module shown in FIG. 3, the "information to communicate with the partner station" transmitted from the call control module is sent to the CP via the inter-module communication function (MET). It is input to the "signal exchange processing" section (implemented by software) of the system. In the signal exchange processing section, the NO.
No. 7 common line signal is converted. 7 Signal control device (CS7C) is activated to communicate with the partner station.

Although the case where it is necessary to communicate with the partner station as a result of the call control has been described above, the call control process may be activated by the communication information from the partner station. Also in this case, the trunk line signal interface module, for example, the common line signal module 2a in FIG. 3, receives the communication information from the partner station, converts it into the M signal in the signal conversion processing unit, and transfers the M signal to the corresponding call control module. To do. As a result, the call control processing of the call control module is activated.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention, and these modifications are not excluded from the scope of the present invention.

[0017]

As described above in detail, according to the present invention, in a signal processing method in a node system in an information exchange network in which a plurality of different trunk line signaling systems exist, the plurality of different trunk line signals are A relay line signal interface module that is connected and has a conversion function of converting the relay line signal into a signal between modules unified in the node system, and the relay line signal interface module is provided independently of the node system. Since the call control module is configured so as to have a call control module having an inter-module signal processing function unified within the node system, the call control module does not have to be aware of various trunk line signaling methods, It is possible to communicate with the partner station using only the signal.

Therefore, in the conventional case, various signal processing schemes are directly supported from the viewpoint of the call control unit, and existing signal processing schemes must be supported until the scheme no longer exists in the network. However, even when developing a new node system, it was always necessary to design in consideration of all the existing signal processing methods. However, according to the present invention, processing of various trunk line signals is performed by each of the other nodes in the node system. Since the function is closed only in the trunk line signal interface module independent of the function, the node system can be easily designed, and the existing trunk line signal can be easily upgraded to the equipment in line with the times.

[Brief description of drawings]

FIG. 1 is a conceptual diagram showing a signal processing system according to an embodiment of the present invention.

FIG. 2 is a conceptual diagram showing a signal processing system according to another embodiment of the present invention.

FIG. 3 is an explanatory diagram showing a correspondence relationship between a functional block of a common line signal module and each function of a protocol hierarchy of an M signal and a common line signal in another embodiment of the present invention.

FIG. 4 is a system configuration diagram showing a conventional node system.

[Explanation of symbols]

 1 Call Control Module 2 Relay Line Signal Interface Module 2a Common Line Signal Module 2b Individual Line Signal Module 3 Other Module 4 Inter-Module Coupling Mechanism

Claims (1)

(57) [Claims] 1. A signal processing method in a node system in an information exchange network in which a plurality of different trunk line signaling systems exist, wherein : (a) the plurality of different trunk line signals are connected,
Trunk signal Intafe having a conversion function for converting a line signal into a unified inter-module signal in the node system
Module and (b) the trunk line signal interface module are provided independently of each other and are integrated in the node system.
And a call control module having a processing function of an inter-rail signaling system.