KR19990001471A - Multiple local point processing method using common line No.7 signaling between exchange base stations - Google Patents

Abstract

The present invention checks the routing level by receiving a message from the user in order to increase the number of communication lines by the number of local signal points in the manner of assigning and operating multiple local signal point codes in the same exchange. Obtains, checks the status from the obtained DOP data, and if it is not available from the status of the DOP data, discards the message and if it is available, finds the signal link cell for the DOP and sends the message to the called point. Receives messages from other stations, obtains origin and destination points by routing level, checks whether the obtained destination points belong to n local stations, and performs STP function if they are not own local stations. And as the message type is checked, the message of signaling network management is sent to the signaling network management processor. The message of the SCCP delivers the message to the SCCP looping function as the message type is checked, and the ISUP message obtains the ISUPn for the MTPn, and obtains the CIC for the ISUPn by checking the message type. It is intended to forward messages to ISUPn.

Description

Multiple local point processing method using common line NO.7 signaling between exchange stations

According to the present invention, in the NO.7 signaling system of an all-electronic exchange, the common line NO.7 signaling system between switching stations for application to ISUP code, intelligent network, and mobile network by assigning several local signal point codes to the same exchange station. The present invention relates to a multiple mark processing method.

In general, the number of inter-station trunks handled by high-capacity exchanges is 60,000, so the length of the circuit identification number (CIS) in the looping table of CCS NO.7 recommended in the ITU-T standard is 12 bits. Only 4096 call lines can be accommodated. Therefore, by applying this function, it is possible to extend the call lines by 4096 * number of local signal points (n). The seven functions are currently used for call control, remote control operation and maintenance signaling and special services for telecommunications services, such as telephone ISDN circuit switched data transfer services and other types of information transfer functions between exchanges and specialized centers. It is used for multipurpose service and other service network, and to meet reliable information transmission in domestic and international communication network. Therefore, this function is divided into 4 functional levels, level 1-3 is the message transfer function, level 4 This is a function of the user part. Looking at this function hierarchically, the level 1 signaling data link (MTP level 1) defines the physical, electrical and functional characteristics of the signaling data link and the means of accessing the link. Signaling data link (MTP 2) is the delivery or delivery of signaling messages over one independent signaling data link. It defines the related functions and means, which carries the signal messages and provides the signal link functions such as error detection, correction, and sequence control of signal units on the signal data link. Level 3 signaling network function (MTP Level 3) Has a signaling message processing function and a signaling network management function. The signaling message processing function processes a function of sending a message to a corresponding signal link or a user part in actual message transmission. When there is a change in the status of the current signaling network facility and the ability to control the routing of messages based on predetermined information or data, this function is used to preserve or restore normal message delivery capabilities and other actions. Level 4 has several user parts, each of which is a specific type of user of the system. The scope of the functions of the user part varies considerably according to the different categories of signaling users as follows: First, if most of the user communication functions are defined in the signaling scheme, the corresponding telephone and data An example is the telephone and data call control function using the user part. Second, when most user communication is specified irrespective of the signaling method, the signaling method is used to transmit information for management or maintenance purposes. In the user part, the user part can be regarded as a mailbox-type interface, for example, in which user information to be transmitted is assembled from an appropriate signaling message format and between the disassembled message delivery function and an external user system. Paging and CDMA MSC Switch using NO.7 Signaling Network The call service supports a single signaling point, i.e., a single signaling point on the exchange, to the intelligent network by ISDN. A network applied before a single signal by the ITU-T Q.700 series has a looping table structure as shown in FIG. Therefore, there is a problem that CIC value used for NO.7 ISUP call processing between signal points cannot be accommodated according to the above restrictions when accepting relay line with more than the limit number (4,096) between large stations.

Accordingly, an object of the present invention is to allocate and operate multiple local signal point codes in the same exchange, and to use the MPC as a single signal network to increase the number of communication lines as many as 4096 * local signal points. In providing.

1 is an ISUP message looping table applied to an embodiment of the present invention.

2 is a diagram illustrating an MPC network applied to an embodiment of the present invention.

3 is a configuration diagram of NO. 7 by the MPC of the embodiment of the present invention;

4A and 4B are flowcharts of a message processing applied to an embodiment of the present invention.

5 is a signal network management flowchart applied to an embodiment of the present invention.

6A and 6B are flowcharts illustrating ISUP call processing applied to an embodiment of the present invention.

7 is a local table table applied to an embodiment of the present invention

8 is a local point state table applied to an embodiment of the present invention.

9 is an exemplary MPC diagram showing an STP function applied to an embodiment of the present invention.

10 is a diagram illustrating the addition of an ISUP DOP point table for CIC information and MTPn applied to an embodiment of the present invention.

11 is a signal link set information table applied to an embodiment of the present invention.

12 is an incoming / outgoing information table applied to an embodiment of the present invention.

13 is an example attempt to indicate a line number applied to an embodiment of the present invention by a CIC table.

14 is a table illustrating an STP load distribution algorithm by MPC applied to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A detailed description of a preferred embodiment of the present invention will now be described with reference to the accompanying drawings. In the following, reference numerals are given to components of each drawing, even though the same components are shown in different drawings. Note that they have the same sign. In describing the present invention, when it is determined that a detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are defined in consideration of functions in the present invention, which may vary according to the intention or custom of a user or a chip designer, and the definitions should be made based on the contents throughout the present specification.

2 is a diagram illustrating a configuration of a multiple point code (MPC) network according to an embodiment of the present invention.

An MPC applied exchange including a plurality of single signal point exchanges (OPC # 1-OPC # n),

It consists of a single signal point exchange connected to a single signal point exchange (OPC # 1-OPC # n) of the MPC applied exchange.

3 is a configuration diagram of NO.7 for the MPC applied to the embodiment of the present invention;

MTP L3 section 305 configured to have n functions of MTP L3, and ISUP function section 311 configured to have n functions of ISUP, and MTP L30 of the MTP L3 section 305 (Single signal point) to configure the signaling ring with MTP L3, MTP L3-power MTPL3 .... MTPl3-power MTPL3 to perform the NO.7 network management and signal processing function between the power, the MTP L3 part ( 305) and ISUP function unit 311 to match ISUP 0-MTPL3 0, ISUP1-MTPL31, ........ ISUPn-MTPL3n to enable ISUP call processing to have n NO.7 structures. It is configured to handle.

4A and 4B are flow charts of message processing according to an embodiment of the present invention.

4A is a flowchart for transmitting a message to another station signal point when a user receives a message.

A first step of receiving a message from a user and checking a routing level to obtain DOP data;

A second process of checking a state from the DOP data obtained in the first process,

In the second process, when the use of the DOP data is impossible, the message is discarded and the third process is performed to find the signal link cell for the DOP and transmit the message to the called point.

4B is a flowchart for receiving a message from a local station to a local signal point.

A first step of receiving a message from the other pole and obtaining an originating point by a routing level;

A second step of checking whether a called point obtained in the first step belongs to n own points and performing STP function if not n own points;

A third step of transmitting the message of the signal network management to the signal network management processor as the message type is checked in the second step;

A fourth step of forwarding the message to the SCCP looping function as the SCCP message is checked in the second step;

As the type of the message is checked in the second step, the message of the ISUP consists of a fifth step of obtaining the ISUPn for the MTPn, obtaining the CIC for the ISUPn, and delivering the message to the ISUPn.

5 is a signal network management flowchart according to an embodiment of the present invention.

A management function discrimination process of determining a management function by receiving a signal network management message to obtain a specific MTP L3;

A signal link management process that analyzes the state of the signal link for a particular MTP L3 when the signal link management function is used in the management function determination process, processes initial synchronization and test functions, and informs test messages and signal link state change messages;

When the signal traffic management function in the management function determination process, the signal traffic management process for performing the conversion, recovery, prohibition, prohibition release function for a specific MTP L3, delivering management messages and status messages;

The signal route management function in the management function determination process handles the signal network prohibition and allowance for a specific MTP 3 and informs the user of the status change for a specific MTP L3 and delivers the signal network management message to the called party. It consists of.

6A and 6B are ISUP call processing flow charts for an embodiment of the present invention.

6A is a flow chart for delivering a message to a specific destination at the ISUP of the MPC exchange of the present invention.

Receiving the ISUP request of the called party and finding the destination for the specific own station;

Obtaining the CIC by the DOP at the home office found in the above process and confirming whether or not the state is available;

According to the availability of the state, the process consists of a process of processing a call loss when available and delivering an IAM message to the MTP when available.

6B is a flowchart illustrating a process when a message is received by the MPC from a specific destination according to an embodiment of the present invention.

Receiving a message including a DOP from the called party and obtaining an internal PCH using the DOP and the CIC;

Obtaining a relay line using the PCM and CIC lower n bits obtained in the step;

Obtaining the median line, and forwarding the message to the ISUP processing function.

Therefore, a specific embodiment of the present invention will be described in detail with reference to FIGS. 1 to 14.

CCS NO.7 function for the present invention can be largely classified into three multi-national functions mainly on the message processing function of MTP L3, signal network management function, and ISUP call processing function of the user part. As shown in Figs. 4A and 4B, the processing functions include a function of receiving a message from a user and looping to a destination and a function of discriminating, distributing, modifying, and re-modifying when receiving a message from a large power station. If a message is sent from the user unit (SCCP, ISUP, TUP .....) in the process of 401), as shown in the example of FIG. The other station point is obtained from the other station table up to the other station 1-n, the other pole point + own station point is configured, the DOP point is configured, the table is managed by the DOP, and the state of the called point is managed by the DOP. Table 8 In the following process (403) to find the DOP data and check the status of the DOP in the process (404), and check whether the DOP is available or unavailable. The message is discarded in the process, and if available, the signal link set information for the DOP is composed of a table for each SLS in step 406, and the signal link for the DOP SLS is found in step 407. In step 408, when the signal link is established, the terminal transmits the information received from the user to the destination point. In step 412, a message is received from another station, and the call destination is obtained according to the routing level in step 412. In step 413, the call destination is identified by belonging to n stations. Poin If the data of the table of n local points and the destination point do not coincide in step 414, the destination point is obtained from the other station table by checking the other station table as shown in FIG. Since there is a plurality of signal link set information transmitted from the local station to the destination, it rotates for each SLS, selects from a plurality of signal link set information, and delivers it to the destination. As shown in FIG. 9, the SPA-SPB is transmitted. Data is to be distributed by SPA-OPC1-SPB (SLSO), SPA-OPC1-SPB (SLS 1) ...... SPA-OPCn-1-SPB (SLS n-1) as shown in the example of FIG. If there is a specific local point data in step 414, the signaling type of the routing level is checked in step 415 to confirm the type of message. For signal network management If it is an SCCP message, it transmits the message to the SCCP routing to perform the SCCP function. If the ISUP message is obtained, the ISUPn for MTPn is obtained in step (418), and (419). The CIC is obtained from the ISUPn, and the message is transmitted to the ISUPn in step 420. That is, in the case of the ISUP message, the local point information of the routing level is obtained from the terminating point table to obtain the terminating point. The specific ISUPn corresponding to the ISUP for the local point by the point is obtained. Then, the DOP is obtained to obtain the DOP and the CIC 7 bits of the routing level to obtain the trunked ASP. The information of the DOP must be present in the ISUP. Since the routing trunk information is obtained by the system, a table that manages DOP points is constructed and this information is loaded from the ISUP data to the message ISUP. The signal network management of step 416 of FIG. 4B can be described in detail with reference to FIG. 5. In step 511, the signal network management message is received to obtain a call destination and a calling point at a routing level. In step 512, the own station is found by referring to the own station table of FIG. 7, and the destination point is obtained by using the destination point table, and it is checked in step 513 whether it is information about a specific own station. If the message corresponds to the signal link management function in step), and if it is a message, check whether the signal link information is allocated to the table as shown in the example of FIG. 11 by using the local point and the destination point information obtained in step 511. If the signal link information is allocated, the corresponding signal link change information is analyzed in step 515. If the signal link initial synchronization request is made in step 516 after the analysis is completed, the initial synchronization clause is performed. If the signal link test function is required, the signal link test function is performed, and if the signal link failure occurs, the maintenance block is notified. It transmits to the originating point by changing the point and other point information, and in the case of a signal link failure to notify the maintenance function and to notify the signal information of the signal link to the signal traffic management block. In step 513, the signal track management function When the message is received from the power station, the table of FIG. 11 is analyzed to change and adjust the traffic for the corresponding link set. In step 518, specific signal link set information is determined based on the local point and the other point information of the routing table. In step 519, the signal link set for a specific local point is obtained, and then the conversion, recovery, and prohibition for a specific HTP L3 is performed. In step 513, the signal route management transmits a status change message to a specific destination at a different destination from the determination of the management function. In case of receiving or failing to send traffic from a specific destination to a specific destination due to a signal link failure, the management function is performed by the route. The processing by this function is the originating point at the routing level in step 522. When the DOP data is received in the incoming / outgoing information table as shown in FIG. 12 and the state change message for the specific called point is received, the signal point of the signal link set connected to the adjacent signal point is changed. The state is changed for the N stations connected to it, and in the case of the state change for a specific destination, the state is changed only for a specific destination. When changing the state of the called point, the corresponding DOP is transmitted to the user part in step 523, all roots related to the DOP connected to the signal link are disabled in step 524, and associated with the link set. Changing the state of the called point allows all state changes associated with n local points, that is, TFA and TFP messages to be transmitted to adjacent signaling points.

The process of SCCP in step 417 of FIG. 4B can be described in detail with reference to FIGS. 6A and 6B. In the SDX, which is a TOLL switch, 60000 lines can be accommodated. However, in TTA, ITU-T, etc., circuit identification between specific signals is performed. The number is limited to a maximum of 4096. Therefore, it is possible to assign 4096 * n line identification numbers by using several local points in the ISUP. In Figs. 6A and 6B, Fig. 6A shows a message to a specific destination at the ISUP of the MPC exchange. 6B is a flowchart illustrating a process when a message is received from the specific destination by the MPC. For the processing of FIG. 6A, a value of CIC is obtained from the table of FIG. 13 (611). For the ISSP request for the called party's transmission in the process, find the destination point for the specific local point in step 612, obtain the CIC by the DOP in step 613, and check the corresponding destination point in the step 614. end If the called point is available, in step 615, the calling point, the called point, and the CIC information are updated in the routing table so that the ISSP message is delivered to the called point through the MTP. If the called point is not available, it is treated as a call failure in step 616. [0060] FIG. 6B shows that when a message is received by the MPC from a specific called point, the process is received by the ISSP including the DOP in the message from the called party in step 621. In step 622, CIC is obtained at the routing level, DOP is obtained from the message, and the internal PCM is obtained by combining the 7 bits of DOP + CIC according to the data to obtain an internal PCM. In step), the PCM and the CIC lower 5 bits are combined to form an external line number, and the key is transmitted to the ISUP process to find the relay line using the table of FIG. 14 and set up the ISUP.

As described above, in all systems using the common line NO.7 method, it is advantageous to use when the capacity of the system is exceeded for all signal points connected to the signal link in contact with each other. For example, in case of SDX-100, up to 60,000 trunks can be accommodated between adjacent signals.In particular, in case of the system used as TOLL, only one signal link set is configured between specific destinations in TTA or CCITT recommendation. Although the number of links can only be accommodated up to 16, the number of signal link sets can be increased further, so the number of signal link sets can be freely determined according to the traffic volume of adjacent signal points, which is advantageous in using the link and processing the available channel. have.

Claims (3)

In the multi-station point processing method of NO.7 signaling method of exchange, A first step of receiving a message from a user and checking a routing level to obtain DOP data; A second process of checking a state from the DOP data obtained in the first process, A third process of discarding the message if it is not available from the state of the DOP data in the second process and finding a signal link cell for the DOP and transmitting the message to the called point if it is available; A fourth step of receiving a message from the other pole and obtaining an originating point by the routing level; A fifth step of checking whether a called point obtained in the fourth step belongs to n own points, and performing an STP function if not n own points; A sixth process of transmitting a message to the signal network management processor as a message of the signal network management according to the message type in the fifth process; A seventh step of transmitting the message to the SCCP looping function as a message of the SCCP as checking the type of the message in the fifth step; As the message type is checked in step 5, the message of ISUP consists of an eighth process of obtaining ISUPn for MTPn, CIC for ISUPn, and delivering the message to ISUPn. Signaling method of multiple local points processing. According to claim 1, Signaling network management A management function discrimination process of determining the management function by receiving the signal network management message and obtaining a specific MTP L3; A signal link management process that analyzes the state of the signal link for a particular MTP L3 when the signal link management function is used in the management function determination process, processes initial synchronization and test functions, and informs test messages and signal link state change messages; When the signal traffic management function in the management function determination process, the signal traffic management process for performing the conversion, recovery, prohibition, prohibition release function for a specific MTP L3, delivering management messages and status messages; The signal route management function in the management function determination process handles the signal network prohibition and allowance for a specific MTP 3 and informs the user of the status change for a specific MTP L3 and delivers the signal network management message to the called party. Multiple local point processing method of common line NO.7 signaling method between exchange stations. The method of claim 1, wherein the SCCP message is Receiving a destination transmission ISUP request and finding a destination for a specific local point; Obtaining the CIC by the DOP at the home office found in the above process and confirming whether or not the state is available; The process of processing a call loss when available and delivering an IAM message to the MTP when it is available, according to the state availability; Receiving a message including the DOP from the called party and obtaining the internal PCH using the DOP and the CIC; Obtaining a relay line using the PCM and CIC lower n bits obtained in the above process; The method of processing a multi-station point of common line NO.7 signaling between exchange stations, comprising the step of obtaining the center line and then transmitting a message to the ISUP processing function.