KR100555409B1 - digital switching system for processing No. 7 signalling and method of processing signalling - Google Patents

Abstract

The present invention is No. The present invention relates to an electronic switching system that processes seven types of signaling messages. The electronic switch which handles 7 types of signaling messages is obtained from an external network. 7 When a signal message according to the common line signaling method is received, the signal message is processed to be directly transmitted to the second call processor through the interprocessor communication control unit, and the processed part is deleted from the received response message to the external network. A processor communication unit which is located between a first call processing processor to transmit, a communication control unit between the first call processing processor and the processor, and exchanges messages, and a direct connection structure with the second call processing processor, and a processor communication unit An interprocessor communication control unit for directly transmitting a signal message received from the second call processing processor and a response message received from the second connection switching processor to the first access switch through the interprocessor communication unit; Of the signal messages received directly from the control unit Remove the processed part from the No. 1 processing processor, identify the No. 7 processor to which the signal message is to be transmitted, transmit it to the identified No. 7 processor, and process the response message received through the No. 7 processor to process the first. And a second call processing processor for transmitting to the call processing processor. 7 It is possible to improve the processing speed of signal messages according to common line signaling method.

Description

number. Electronic switching system for processing 7-way signaling message and a method of processing the signaling message {digital switching system for processing No. 7 signaling and method of processing signalling}             

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an overall block diagram for explaining the configuration of an electronic exchanger with improved call processing function according to a preferred embodiment of the present invention.

2 is a view for explaining the initial setting flow in the electronic switch according to a preferred embodiment of the present invention.

3 is a diagram illustrating a flow of processing a signaling message in an electronic switch according to a preferred embodiment of the present invention.

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

10: lower processor 11: no. 7 processors

20: global bus

30, 31: access switching processor (ASP)

40: IIPCU (Inter-connect Inter Processor Communication unit)

50: CIPCU (Control Inter Processor Communication Unit)

60: operation and maintenance processor (OMP)

The present invention is No. The present invention relates to an all-electronic exchange for processing a seven-way signaling message and a method for processing the signaling message. More particularly, when processing an important signaling message between processors in the all-electronic exchange, the transmission path of the signaling message is minimized. No. to improve processing efficiency The present invention relates to an electronic switch and a signal message processing method for processing a seven-way signal message.

A general electronic exchanger is a device for quickly and accurately connecting a subscriber's communication path by using an electronic device that operates at high speed, such as a transistor and an integrated circuit (IC), and to facilitate maintenance work.

As a device that can provide flexibility, reliability, and various services to lead a complex information society today, TDX series electronic exchangers, which are called so-called electronic exchangers, are mainly used.

These electronic switchboards are large-capacity exchangers co-developed by predetermined exchange producers centering on the Korea Telecommunications Research Institute to cope with the characteristics of various communication networks. Used for modular structures.

In addition, the decentralization of control functions using a 32-bit commercial microprocessor and the message communication by high-speed IPC (Inter Processor Communication). In addition, high-speed communication between subsystems by optical fiber links is enabled.

Looking at the structure of such a general electronic switch for a while, it has a structure that allows a plurality of distributed processors to perform call processing by exchanging messages with each other.

To this end, each processor provides a separate IPC network dedicated to high-speed message exchange. Such a network is called Control Interworking (CI), which is a high-performance packet switch capable of connecting about 1800 terminals.

In control interworking (CI), the message is in the form of a bit-oriented frame, and messages can be exchanged through control interworking (CI) between all processors forming the exchange.

Also, in control interworking, the communication scheme is point-to-point, where one processor communicates with another processor, and multicast, where one processor can send messages to multiple processors. ), There is a broadcast that can send messages to all processors in the system.

Here, multicast and broadcast are very useful functions during initial booting and initialization of the electronic switchboard.

Meanwhile, in the inter-network call processing system, interest in No. 7 (Signaling System 7: SS7) is increasing.

This No.7 method is a standard of Common Channel Signaling (CCS) developed by the International Telecommunications Union-Telecommunication Standardization Sector (ITU-T) in the late 1970s, and the initial No.7 method is a telephone call management. It was developed for applications, but its functionality has since been extended.

Currently, the No. 7 method provides various functions such as database search, transaction, network application, and integrated services digital network (ISDN).

Also no. The seven schemes support circuit establishment, information exchange, routing operation, and intelligent network services as ont-of-band trunk line signaling in public telephone networks.

The advantage of this No. 7 method is that it is possible to minimize the dial transmission delay, that is, the No. 7 method. In the 7 network, receiver and sender number information is included in an initial establishment message, so that a dual tone multi frequency (DTMF) tone is not transmitted to a public telephone network.

Another no. The advantage of the seven scheme is that the call completion rate can be improved because it is sent in a packet containing all the necessary information. In addition, it can be linked with an intelligent network, and has the advantage of easily opening applications and services that can be provided to various other equipment manufacturers.

However, the electronic switch used today is No. 1, which is an inter-station call signal with increasing usage. Due to the increase in signal traffic due to signal increase, network switching, next generation intelligent network acceptance, home location register (HLR), number portability, and so on, IPC cannot be performed smoothly.

In other words, by processing the signal traffic and the information traffic that must be processed first in the electronic switchgear, the transmission of the signal traffic is not smoothly transmitted.

Accordingly, the present invention has been devised to solve the above problems, and has a high frequency of occurrence of signal messages. No. generated by the all-electric exchanger using the 7 method. 7 Signaling The signal processing speed of the message is improved, and the frequency of occurrence is high. 7 No. This prevents bottlenecks in which data transmission and reception rate decreases due to signal messages. It is an object of the present invention to provide an electronic switch for processing a seven-way signal message and a signal message processing method thereof.

No. according to one aspect of the present invention for achieving the above object. The electronic switch which handles 7 types of signaling messages is obtained from an external network. 7 When a signal message according to the common line signaling method is received, the signal message is processed to be transmitted directly to the second call processor through an Inter-connect Inter Processor Communication unit, and the received response message is It is located between the first processing processor (access switching processor) and the first processing processor (Control Inter Processor Communication Unit) and deletes the processed portion to send to the external network to exchange messages A processor communication unit, and a direct connection structure with the second call processing processor, and directly transmits a signal message received from the processor communication unit to the second call processing processor, and transmits a response message received from the second connection switching processor. The process of transmitting to the first access switch via the communication unit Removes the processed portion of the first call processor from the inter-communication control unit and the signal message directly received from the inter-processor communication control unit, identifies the No. 7 processor to which the signal message is to be transmitted, and identifies the No. 7 processor. And a second call processing processor for processing the response message received through the No. 7 processor and processing the response message.
An interprocessor communication control located between an access switching processor and an Inter-connect Inter Processor Communication unit according to another aspect of the present invention and directly connected to the second processing processor. In a method for processing a signaling message in an electronic switching system including a control inter processor communication unit, the first call processing processor is configured to obtain a no. When a signal message according to the common line signaling method is received, processing the processing for transmitting the signal message to the second call processing processor, and transmitting the processing to the processor communication unit, the processor communication unit from the first call processing processor Transmitting the received signal message to the inter-processor communication control unit for transmission to the second call processing processor, and wherein the inter-processor communication control unit transmits the signal message received from the processor communication unit to the directly connected second call processing processor. And the second call processing processor removes the processed portion of the first call processing processor from the signal message received directly from the interprocessor communication control unit. Transmitting to the first processor the seventh processor, and sending the response message received from the No.7 processor to the first call processor. Deleting it and transmitting to the external network.

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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an electronic switch with improved signal message processing function and a signal message processing method thereof will be described in detail with reference to the accompanying drawings.

1 is an overall block diagram illustrating a configuration of an all-electronic exchanger having improved call processing function according to a preferred embodiment of the present invention.

As shown in FIG. 1, the electronic exchange includes a Control Inter Processor Communication Unit (CIPCU) 50, a plurality of Inter-connect Inter Processor Communication units (IIPCUs) 40, and a Global Bus 20. , Multiple subprocessors (PP) 10, multiple No.7 processors (TLSP, SS7P0, SS7P #) 11, operation and maintenance processor (OMP) 60, and multiple access switching processor (ASP) ( 30, 31).

The OMP 60 manages each ASP 30 and 31 of the electronic exchanger. That is, when each ASP (30, 31) is activated, the CMP (60) receives a program request from the ASP (30, 31), transmits the program information required by the ASP (30, 31), and each ASP Manage the operation information of (30, 31).

The IIPCU 40 is implemented in an inter networking sub-systen (INS) to connect the CIPCU 50 with a plurality of ASPs 30 and 31. The CIPCU 50 controls each IIPCU 40.

The common bus 20 connects each of the processors 10 and 11 to be connected to the same ASP 30 and 31 and the corresponding ASPs 30 and 31.

The IIPCU 40 accommodates up to 14 subprocessors and is connected to the CIPCU 50 to handle signaling message exchange.

At this time, the connection between the IIPCU 40 and the CIPCU 50 is made of a U-link that can have a transmission rate of 10MHz.

The structure of the CIPCU 50 is similar to that of the IIPCU 40, and the CIPCU 50 accommodates up to five IIPCUs 40, two subprocessors and one MPH, and the connection between each processor has a transmission rate of 10 MHz. It consists of a U-link with.

In addition, the IIPCU 40 and the CIPCU 50 transmit and receive a signal message through a U-link having a transmission rate of 10 MHz, respectively, and transmit its own clock and data, and the redundant gateway transmits an alarm signal from a gateway in standby state. do.

On the other hand, the IPCU of the electronic switchgear may be composed of a plurality of nodes, a D-bus in which IPC message exchange is performed between the nodes, and a node manager managing nodes.

In a brief look at how messages are transmitted and received between them, when a message is input from a processor (or external) to a corresponding node through a U-link, the node receives the message from the D-bus to the node by sequential bus arbitration. Immediately output to the processor (or external) via the U-link.

The connection between different IIPCUs 40 is performed through a gateway node, and may use a store-and-forward method or a cutthrough method.

First, the storage and transmission method starts transmission on the U-link after a signal message is received from the D-bus, and may operate even if transmission / reception rates between the respective IIPCUs 40 are different.

On the other hand, in the simultaneous transmission method, when a signal message starts to be received from the D-bus, it immediately starts transmitting to the U-link in units of bytes. However, the transmission speed of the signal message is fast, but the transmission speed is necessarily received. There is a limit to being slower.

In the TDX-10 (TDX-10) system, which is an example of an electronic switch, an access switching subsystem (ASS), a central control subsystem (CCS), and an interconnection network subsystem (INS) each have their own processors according to the distributed control concept. The IIPCU 40 is configured to support. The exchange of signaling messages between these IIPCUs 40 is in charge of the INS.

A node is a basic unit that provides a path for an interprocessor communication network. The nodes are connected one-to-one by the control processor and the U-link. The nodes transmit IPC messages received from the U-link to the D bus and transmit IPC messages received from the D bus to the U-link.

In addition, since most of the nodes are implemented in hardware, IPC message processing speed is very fast, redundant configuration is possible, and 8-bit microcontroller can be provided for self-diagnosis and management.

In addition, the D bus having a transmission rate of 10 Mbps is a common bus that connects CIs in one subsystem to each other, thereby transmitting and receiving IPC messages between CIs, and all D-bus signals are tripled to maintain high reliability. The status of the D-bus is monitored by the CIP.

The CI which intends to transmit the IPC message transmits the IPC message as bitstream data, and transmits a synchronous clock signal necessary for data transmission.

Since the CIs are connected by a common bus, the D-bus, each node needs a bus arbitration function for the D-bus in order to occupy the D-bus without collisions. Follow the robin method.

The CIP provides the D-bus with the signals needed for bus arbitration, and each CI receives the incoming signal and feeds it to its D-bus. All CIs simultaneously increase their counters by the supplied signal. For example, if any one CI occupies a D-bus, the counters of all CIs will stop.

In this case, if the initial value of the counter is different, each time point of reaching the maximum value is different, and when the counter reaches the maximum value, each CI has a chance of occupying D-bus.

In addition, the CIP supplies the D-bus with the signals required to set the initial value of each CI counter, after all CIs connected to the D-bus have the opportunity to occupy the D-bus.

CIP monitors and controls the operation status of CIs, which are the most basic components of an IPC network. One CIP monitors the D-bus arbitration status of up to 32 CIs, and monitors each signal of the tripled D-bus to identify the fault status of the D-bus and through the M-bus and U-link. Exchange various messages with CI.

Meanwhile, referring to the connection structure of each unit of the all-electronic exchange shown in FIG. 1, the plurality of subprocessors (PP) 10 are connected to the nodes of the ASP-T 30 through the common bus 20. The ASP-T 30 node is connected to the node of IIPCU # 0 40.

The node of IIPCU # 0 40 is connected to the node of CIPCU 50 through a U-link.

In addition, No. The seven processors (TLSP, SS7P0, SS7P #) 11 are connected to the nodes of the ASP-7 31 via the common bus 20, and the nodes of the ASP-7 31 are connected to the CIPCU 50 via the U-link. Is directly connected to the node. That is, the node of the ASP-7 (31) is directly connected to the CIPCU (50), the signal processing speed can be improved compared to the structure connected through the existing IPCU # n (not shown), the structure that the data is transmitted and received By changing, it is possible to prevent the data transmission / reception rate from being lowered due to the bottleneck.

The node of the OMP 60 is connected to the node of the IIPCU # N 40, and the node of the IIPCU # N 40 is connected to the node of the CIPCU 50 through the U-link.

2 is a view for explaining the initial setting flow in the electronic switch according to a preferred embodiment of the present invention.

Referring to FIG. 2, when initial power is applied to the all-electronic exchange, the ASP-T 30 and the ASP-7 31 perform initial processing.

In addition, the ASP-7 31 attempts to communicate with the CIPCU 50 through the U-link. At this time, the ASP-7 31 attempts to communicate with a node of the CIPCU 50 through the U-link by using a node having a communication opportunity of its own node according to the round robin method.

When the communication with the CIPCU 50 succeeds, the ASP-7 31 requests the activation of the OMP 60 so that the OMP 60 is activated. That is, the ASP-7 31 requests activation to the OMP 60 via the IIPCU # N 40 through the successful communication node (1).

When the OMP 60 is activated, the ASP-7 31 transmits a program request signal to the OMP 60 through a path where communication is successful, and thus downloads a program transmitted from the OMP 60. (2).

At this time. The program downloaded by the ASP-7 31 may correspond to an operating system (OS) program and an application program for processing a signal message.

Then, the ASP-7 31 executes the downloaded programs and activates them. Perform preparatory work to handle call 7.

On the other hand, when the ASP-T 30 is activated, it attempts to communicate with the IIPCU # 0 (40). At this time, the ASP-T 30 attempts to communicate with a node of IIPCU # 0 40 through a node having an opportunity according to a round robin method among its own nodes.

When the communication attempt with the IIPCU # 0 40 succeeds, the ASP-T 30 transmits an activation request signal to the IIPCU # 0 40, and the IIPCU # 0 40 sends the ASP-T 30. When received as an activation request signal from the attempt to communicate with the CIPCU 50 over the U-link using the node of the opportunity of its own node.

The IIPCU # 0 30 transmits an activation request signal when the communication with the CIPCU 50 succeeds, and the CIPCU 50 attempts to communicate with the IIPCU # N 40, and the activation received when the communication succeeds. The request signal is transmitted to the OMP 60 through communication with the IIPCU # N 40.

The OMP 60 activates when an activation request signal is received through IIPCU # N 40.

Then, the program is transmitted according to the program request received from the ASP-T 30. The ASP-T 30 downloads a program from the OMP 60, activates the downloaded program, and performs a preparation for the trunk line call processing.

3 is a diagram illustrating a flow of processing a signaling message in an electronic switch according to a preferred embodiment of the present invention.

Referring to FIG. 3, the lower processor (PP) 10 may receive a No. 1 from an external network (not shown). When the 7 signal message is received, the lower processor 10 transmits to the ASP-T 30 through the common bus 20.

The ASP-T 30 receives No. 1 received from the lower processor 10 through the common bus 20. 7 signal message is processed to be processed by the ASP-7 (31), and attempts to communicate with IIPCU # 0 (40). That is, ASP-T 30 is No. 7 Signaling messages are processed for processing by the ASP-7 (31) and transmitted to the ASP-7 (31) directly connected to the CIPCU, thereby improving the signal processing speed of the No. 7 signal message.

The ASP-T 30 attempts to communicate with a node of IIPCU # 0 40 by using a node having an opportunity according to a round robin method among its nodes.

When the ASP-T 30 succeeds in attempting communication with the IIPCU # 0 40, the ASP-T 30 processes the processed No. 7 Send a signaling message to the ASP-7 31 via the IPCU block.

At this time, the IPCU block is set to No. 7 refers to the IIPCU # 0 40 and the CIPCU 50 for transmitting the signaling message, wherein the ASP-T 30 is the ASP via the node of the IIPCU # 0 40 and the node of the CIPCU 50. No. 7 machined with a node of (31) 7 Send a signaling message.

ASP-7 (31) is a No. received from the ASP-T (30). 7 Remove the processed portion of the signal message from the ASP-T 30 for transmission to another processor. 7 Signal message via the common bus (20). 7 processor (SS70) (11) (3).

No. 7 processor (SS70) 11 receives the received No. 7 Analyzes the signaling message and sends the message to the external network (not shown). 7 Sends a signaling message and the received No. 7 Create a response message to the signaling message.

That is, No. 7 processor (SS70) 11 receives the received No. A response message for the 7 signal message is generated and transmitted to the ASP-7 31 through the common bus 20.

And ASP-7 (31) is No. The ASP-T 30 processes the response message received from the 7 node SS7P0 11 and attempts to communicate with the node of the CIPCU 50 through the U-link.

That is, the ASP-7 31 attempts to communicate with the CIPCU 50 through the U-link by using a node having an opportunity according to the round robin method among its own nodes.

When the communication attempt succeeds, the ASP-7 31 transmits a response message to the ASP-T 30 through the IPCU block by using the node that succeeded in the communication attempt.

That is, the ASP-7 30 transmits a response message to the ASP-T 30 via the node of the CIPCU 50 and the node of the IIPCU # 0 40.

The ASP-T 30 removes a portion of the response message received from the ASP-7 31 from the ASP-7 31 and transmits the processed portion to the lower processor (PP) 10 through the common bus 20. do. That is, the ASP-7 31 processes the response message and sends it directly through the CIPCU, thereby improving the signal processing speed of the response message.

Then, the ASP-T 30 displays the response message received from the ASP-7 31 as No. 7 Send the signaling message to the external network.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and changes are possible within the technical spirit of the present invention, and such modifications and modifications belong to the appended claims.

As described above, according to the present invention, No. 7 No.7 signal message is processed by all electronic switch using common line signaling and transmitted to ASP-7 directly connected through CIPCU. 7 It has the effect of improving the signal processing speed of the signal message.

In addition, the electronic exchange has a structure in which the ASP-7 is directly connected to the CIPCU, thereby preventing data bottlenecks that may occur when data is exchanged between the ASP-7 and the CIPCU, thereby processing more communication capacity. It can be effective.

Claims (3)

No. 7 In an all-electronic exchange that processes signaling messages according to common line signaling, No. from the external network 7 When a signal message according to the common line signaling method is received, the signal message is processed to be transmitted directly to the second call processor through an Inter-connect Inter Processor Communication unit, and the received response message is received. A first call processing processor which deletes the processed part and transmits the processed part to the external network; A processor communication unit located between the first call processing processor and a Control Inter Processor Communication Unit and connected to exchange messages; It has a direct connection structure with the second call processing processor, and directly sends the signal message received from the processor communication unit to the second call processing processor, and the response message received from the second connection switching processor between the processors An interprocessor communication control unit for transmitting to the first access switch via a communication unit; The part processed by the first call processing processor of the signal message received directly from the interprocessor communication control unit is identified, and the No. 7 processor to which the signal message is transmitted is identified and transmitted to the identified No. 7 processor. And a second call processing processor which processes a response message received through the No. 7 processor and transmits the response message to the first call processing processor. Electronic switchboard handling 7-way signaling messages. A control interprocessor communication unit located between an access switching processor and an inter-connect inter processor communication unit, and directly connected to the second processing processor. In the method for processing a signaling message in an electronic switching system comprising: The first call processor is configured to obtain a No. When a signal message according to the common line signaling method is received, processing a processing operation for transmitting the signal message to a second call processing processor and transmitting the processing message to the processor communication unit; Sending, by the processor communication unit, the signal message received from the first call processing processor to the interprocessor communication control unit for transmission to a second call processing processor; The interprocessor communication control unit transmitting the signal message received from the processor communication unit to a directly connected second call processing processor; The second call processing processor removes a portion processed by the first call processing processor from the signal message received directly from the interprocessor communication control unit. Transmitting the response message received from the No. 7 processor to the first call processing processor; And deleting, by the first call processing processor, the processed portion from the second call processing processor and transmitting the deleted portion to the external network. 7 How to handle signaling messages. The method of claim 1, wherein the first call processing processor, A No. which processes the signal message to be sent directly to the second call processing processor via the processor communication unit and the interprocessor communication control unit. Electronic switchboard handling 7-way signaling messages.

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