KR100311143B1 - Method for translating the office code in the switching system - Google Patents

Abstract

The present invention sets up a number translation system for a station code so that a single country code can be assigned to a plurality of exchanges in an exchange configured to separately process a country code, a region code, a station code, and a subscriber number. By providing a method for translating a number, the method according to the present invention, when translating a station code, analyzes whether the call type of the station code is another country call or a local call, and analyzes the type of the station code in the case of the own country call. It analyzes whether only its own call can be accepted or can accept both its own call and relay call, and if it can accept both its own call and relay call, it analyzes some digits of the received subscriber number and corresponds to the corresponding station code. After re-analyzing the type, it determines whether it is a local call or a relay call and implements the corresponding call processing. Therefore, the resource utilization of each country code can be improved.

Description

Station code translation method in exchanger {METHOD FOR TRANSLATING THE OFFICE CODE IN THE SWITCHING SYSTEM}

The present invention relates to a method for translating a country code (often referred to as OFC) into an exchange, and in particular, a country code (sometimes referred to as CC), and a region code (Trunk Code, TC). The present invention relates to a method for translating a Korean code so that a single station code can be assigned to a plurality of exchanges in a switch configured to separately translate and translate a station code and a subscriber number (also referred to as SN).

A representative example of an exchange configured to separately translate a country code, an area code, a station code, and a subscriber number is an Asynchronous Transfer Mode (abbreviated as ATM) exchange. In other words, the ATM switch is configured to handle a plurality of media (multimedia) such as voice and video data. The number translation for the destination address received from the originating subscriber is performed by country code, area code, Each translation table for the station code and subscriber number is referred to as needed.

For example, if the country code exists as a result of analyzing the received destination address, the number translation unit in the originating ATM exchanger first translates by referring to the translation table for country code. As a result of translation, in case of an international call, the relay call processing routine requesting an incoming call to the relevant country is performed without further translation processing. Therefore, in this case, only the country code translation table is referred to by the number translation unit in the originating ATM switch.

Further, if the country code does not exist and the area code exists as a result of analyzing the received destination address, the number translation unit in the originating ATM exchanger first translates by referring to the area code translation table. As a result of the translation, the local code is translated into the station code by referring to the translation table for the station code, but if it is a long-distance call, the number translation part of the originating ATM exchanger performs the relay call processing routine without any further translation processing. do.

As a result of analyzing the received destination address, if the country code and the area code do not exist and the station code exists, the number translation unit in the originating ATM exchanger translates by referring to the translation table for the station code. If the translation result is a foreign call, the number translator in the originating ATM exchange system performs the relay call processing routine without any further translation processing. However, if the translation result is a native call, after translating the number with reference to the translation table for the subscriber number, the native call processing is performed.

In this number translation process, the number translation system currently supported in the case of a station code is such that it is possible to determine whether it is a station code of its own station or a station code of another station, as described above. It is not possible to share in multiple ATM exchanges in the same area. Therefore, according to the currently supported number translation system, one station code can be used only in one ATM switch.

However, as in the current numbering system, when the subscriber number is represented by four digits (0000 to 9999), the maximum number of subscribers that can be accommodated by one station code is only one. For example, the subscriber number that can be accommodated in the station code corresponding to '690' is 0000 to 9999 (690-0000 to 690-9999), which can accommodate up to 10,000 subscriber numbers. Therefore, in case of an ATM exchange to which one station code is assigned, it is possible to accommodate a maximum of 10,000 subscribers.

For this reason, the resource utilization of the corresponding station code becomes 100% when the number of subscribers where the ATM switch is installed is at least 10,000 subscribers. On the other hand, if the number of subscribers where the ATM switch is installed is much less than 10,000, the resource utilization of the corresponding station code is reduced by that much. In an extreme case, if the number of subscribers in the ATM switch is installed to 100, the country code uses only 1% of the resource, but the existing number translation system cannot take any action to increase the resource utilization.

The present invention has been made to solve the above problems, and provides a station code translation method that implements the number translation system for the station code in the exchange to accommodate both the relay call and the own call in one station code. The purpose is.

It is another object of the present invention to provide a station code translation method that implements a number translation system for a station code to accommodate a single station code in a plurality of exchanges.

In order to achieve the above object, a station code translation method according to the present invention includes a country code (CC), an area code (TC), a station code (OFC), and a subscriber number (SN) contained in a destination address sent from an originating subscriber. A switch configured to perform separate number translation processing for each station, storing all information related to the station code, including the station code type information that defines whether each station code has been assigned to a plurality of exchanges or only to the local exchange. step; If a station code is assigned to multiple exchanges, a plurality of digits composed of at least one digit extracted in consideration of all acceptable subscriber numbers per station code, so that routing control can be performed according to the subscriber number carried on the destination address. Allocating a routing pointer corresponding to the number; If a setup message is sent from any originating subscriber, analyzing the number type of the called party by number translation processing for the called address included in the setup message; Translating the station code of the called party, if it is a local call, in the number type analysis; A first search step of searching for the corresponding station code type information using the information pointer assigned to the station code of the called party, if the station code is translated; Analyzing the station code type information searched in the first search step, if the corresponding station code is assigned only to the exchange of the own station, performing a local call processing; analyzing the searched station code type information in the first search step As a result, if the corresponding station code is assigned to a plurality of exchanges, extracting a digit of a digit used when allocating a routing pointer from a subscriber number of a called subscriber, extracting a routing pointer corresponding to the number obtained; A second search step of re-searching the station code type information of the called subscriber by using the extracted routing pointer; Analyzing the station code type information searched in the second search step and performing a local call processing if the corresponding station code is a local station; If the station code type information searched in the second search step is another station, it is performed, including the step of performing a local call processing.

1 is a schematic functional block diagram of an asynchronous transfer mode exchange for performing a method according to the invention,

2 is an operation flowchart of a number translation method including a station code translation method according to the present invention;

3 is an exemplary diagram of a case where a station code is assigned according to the present invention in an exchange system operated with a mother station and a local station structure.

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

102: matching unit 104: call processing unit

120: relay call processing unit 110: number translation unit

111: Processor 112: Country Code (CC) table

113: Country Code Information (CCI) table

114: TC (Trunk Code) Table

115: TCI table

116: OFC (OFfice Code) table 117: OFI table

118: Telephone Direct Number (TDN) table

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic block diagram of an Asynchronous Transfer Mode (AMT) exchange for carrying out the method according to the present invention. ), If the call to be processed is a native call, a call processing unit 104 for performing the corresponding call processing, a number translation unit 110 for performing a number translation processing for the digits authorized at the time of origination and reception, When the call is a relay call, it consists of a relay call processing unit 120 that performs the call processing.

In particular, the number translation unit 110 determines the reference table and finally determined number translation results according to the analysis of the digits applied from the call processing unit 104 or the relay call processing unit 120 to the call processing unit 104 or the relay call processing unit ( 120, CC table 112 and CCI (CC Information, hereinafter referred to as CCI), which store information related to number translation of the processor 111, country code (hereinafter referred to as CC), which is responsible for transmitting to ) Table 113, TC table 114 that stores information related to number translation of a region code (Trunk Code, hereinafter abbreviated as TC), and TCI (TC Information, hereinafter abbreviated as TCI) table 115, a station code OFC table 116, which stores information related to number translation of (OFfice Code, hereinafter OFC), and OFI (OFc Information, hereinafter OFI) table 117, and subscriber number (SN). Information related to number translation TDN is composed of a table 118 that is stored.

2 is an operation flowchart of a number translation method including a station code translation method according to the present invention.

Next, an operation of the number translation method illustrated in FIG. 2 will be described with reference to FIG. 1.

First, when a setup message is sent from any originating subscriber housed in the ATM switch shown in Fig. 1, it is transmitted to the call processing unit 104 via the matching unit 102. At this time, a destination address exists in the transmitted setup message, and the destination address includes digit information of the subscriber that the calling party wants to receive. Therefore, the call processing unit 104 extracts the destination address included in the setup message and transmits it to the number translation unit 110.

The number translation unit 110 applies the destination address transmitted from the call processing unit 104 to the processor 111. The processor 111 analyzes the first digit contained in the authorized destination address and determines whether a country code exists in the currently authorized destination address. As a result of the determination, if the country code exists, the processor 111 transmits the digit of the country code contained in the destination address to the CC table 112 while requesting the country code translation to the CC table 112 in step 201. At this time, extraction of the digit of the country code contained in the destination address transmitted to the CC table 112 is performed in the same manner as before. That is, the information as much as the digit assigned to the country code is extracted from the information contained in the destination address.

The CC table 112 determines whether there is information about a country code transmitted from the processor 111 in step 203. As a result of the determination, when a corresponding country code exists, an information pointer assigned to the existing country code is extracted. The extracted information pointer is used to refer to information related to a country code type stored in the CCI table 113. As a result, when the corresponding country code type is an international call, the CC table 112 proceeds from step 205 to step 207 to present the relay call to the processor 111 to perform the relay call processing on the currently requested call. Notify that the call is an international call. Accordingly, the processor 111 does not perform any further translation processing, requests the relay call processing for the call to the relay call processing unit 120, and the relay call processing unit 120 relays the call in the same manner as before. Perform call processing.

However, as a result of referring to the CCI table 113 by using the corresponding information pointer, when the corresponding country code type is domestic, the CC table 112 proceeds from step 205 to step 209 to call the call. Notifies the processor 111 of the domestic call.

The processor 111 sets the number type for the corresponding call to national and then proceeds to step 211 to request translation of the digits of the TC extracted from the destination address currently authorized to the TC table 114. do. The translation request for the digits of the TC is made even when the translation result notified from the CC table 112 is a domestic call as described above, but as a result of analyzing the destination address transmitted from the call processing unit 104, it corresponds to the CC. If the information does not exist and a digit corresponding to the TC exists, it is performed (step 213).

The TC table 114 determines, if a digit translation of the TC currently received from the processor 111 is required, whether there is a TC for which translation is required. As a result of the determination, if the corresponding TC exists, the information pointer assigned to the existing TC is extracted, and the extracted information pointer is used to refer to the TCI table 115 to determine whether the corresponding TC type is a long distance call or a local call. After the determination, the determined result is notified to the processor 111.

When the processor 111 is notified of a long distance call from the TC table 114, the corresponding called subscriber is received in a region to which another area code is assigned, and thus the call processing unit 120 processes the call to the relay call processing unit 120 to perform the relay call processing. (Steps 215 and 217). However, upon notification of a local call from the TC table 114, the number type is set as a subscriber (steps 215 and 219).

The processor 111 proceeds to step 223 to request translation of the OFC digit contained in the destination address currently received in the OFC table 116. The translation request for the OFC digit is made by the translation result from the TC table 114 as described above, but also when the first digit corresponds to the OFC because the CC and the TC do not exist in the received destination address.

The OFC table 116 determines if information about the OFC for which translation is required exists, if a translation for the digit of the OFC is requested from the processor 111. As a result of the determination, if information on the corresponding OFC exists, the information pointer assigned to the corresponding OFC is extracted, and all relevant information stored in the OFI table 117 is referred to using the extracted information pointer. In the OFI table 117, OFC type information indicating whether a corresponding station code can accommodate only its own call or both its own call and a relay call is defined as shown in Table 1 according to the present invention.

OFC_INF_PTR FSN_DGT OFC_CALL_TYPE OFC_CON RTSC_PTR TDN_PTR OFC_TYPE FRST_PTR 0 0 internal 690 - 0 local - 0 One internal 690 - - remote 0 0 2 internal 690 - - remote One : : : : : : : :

In Table 1, OFC_INF_PTR is an information pointer (OFC INFormation PoinTeR) extracted from the OFC table 116, which is allocated one per station code. Accordingly, it can be seen from Table 1, which is a part of the OFI table 117 for the '690' station code, that the information pointer assigned to the station code '690' is '0'. Thus, when the station code received from the OFC table 116 is '690', the extracted information pointer becomes '0'.

FSN_DGT is information of the first digit (First Subscriber Number_DiGiT) of subscriber numbers existing after OFC in the destination address, and is used to refer to the OFI table 117 information corresponding to the first digit currently received, as described above. . OFC_CALL_TYPE is information defining whether a corresponding OFC call type is a local call or an internal call. In this case, the call to another country is called when an incoming call is made to an exchange having the same area code but different from the country code of its own country.

OFC_CON (OFC CONstring) is station code information, RTSC_PTR (RouTing SCenarioPoinTer) is routing scenario information for a corresponding call, and TDN_PTR (Telephone Direct Number PoinTeR) is an information pointer to a TDN table 118 which will be described later.

OFC_TYPE determines whether the corresponding country code can accept only its own call, whether it can accept both its own call and relay call, and whether the corresponding country code is its own call or relay call if it can accept both its own call and relay call. Information to indicate. 'NORMAL' information is defined in OFC_TYPE if the corresponding station code can only accept local calls, and 'local' or 'remote' in OFC_TYPE if the corresponding country code can accept both local and relay calls. Information is defined. If it is 'local', it is its own call, and if it is 'remote', it means a relay call.

FRTSC_PTR (First RTSC_PTR) is an information pointer of a routing scenario. In other words, when FRTSC_PTR is '0', call processing is performed by a routing scenario in which the information pointer is '0'.

Referring to the OFI table 117 configured as described above with reference to the translation process of the OFC digits as follows.

First, if an OFC information pointer OFC_INF_PTR is extracted from the OFC table 116 by a translation request from the processor 111, and the extracted information pointer is provided to the OFI table 117, the OFI table 117 is used. Finds the currently received station code of the OFC_CON connected to the corresponding information pointer. For example, if the extracted information pointer is '0' and the currently received station code is '690', the information pointer 0 is searched in the OFI table 117, and 690 of the station code in the information pointer 0 is allocated. Only search for information related to zero.

When the corresponding station code is searched, the OFC_CALL_TYPE is analyzed. If the station code is external, the relay call is processed according to the routing scenario pointer registered in the RTSC_PTR (steps 225 and 227). ), The OFC_TYPE is analyzed (step 225 and step 229).

As a result of analyzing OFC_TYPE, if 'normal', TDN pointer registered in TDN_PTR is provided to processor 111 to refer to TDN table 118, and after translating the number for subscriber number, to call processor 104 Request call processing for own call (steps 229 and 231)

However, as a result of analyzing OFC_TYPE, if it is not 'normal', it is notified to the processor 111, and the processor 111 proceeds from step 229 to step 233 to determine the subscriber number currently received in the TDN table 118. Require translation for the first digit. Accordingly, when the translated result is provided from the TDN table 118 (step 233), the processor 111 provides the OFC table 116 with the first digit of the translated subscriber number.

When the translated first digit is applied, the OFC table 116 searches for the corresponding OFC_TYPE with reference to the OFI table 117 in step 235. That is, if the translated first digit is applied, the OFC table 116 may include information referred to through the above-described process in the OFI table 117 (for example, information of OFC_INF_PTR is '0' and the station code is '690'). The same information as the first digit authorized among the FSN_DGTs allocated to the data is searched for. When the FSN_DGT having the same information is searched, the corresponding OFC_TYPE is searched again (step 237).

As a result of the search, if OFC_TYPE is 'local', local code processing is performed in the same manner as in the above-described 'normal' (steps 237 and 239). However, if the corresponding OFC_TYPE is 'remote', relay call processing is performed according to the routing scenario registered in the corresponding FRTSC_PTR (steps 237 and 241). For example, since the OFC_TYPE corresponding to the case where FSN_DGT is '1' described in Table 1 is 'remote', relay call processing is performed according to a routing scenario corresponding to '0' set in the corresponding FRTSC_PTR. In order to perform call processing based on the information set in the FRTSC_PTR, the processor 111 may provide the corresponding routing scenario pointer to the relay call processing unit 120. That is, when the routing scenario pointer '0' is provided from the processor 111 to the relay call processing unit 120, the relay call processing unit 120 may be assigned to the routing scenario assigned to the '0' pointer in the routing scenario for the relay call. Relay call processing is performed.

When the translation of the station code is performed as described above, a plurality of exchanges may use one station code as in the example shown in FIG. 3. 3 is an example of an exchange system divided into a mother station 301 and a station (303_0 to 303_9). In the same number translation system, one station code can be used in only one station (RSS). However, according to the station code translation system according to the present invention, one station code can be assigned to all exchanges in the country. That is, based on the first digit of the subscriber number, the subscriber number whose first digit is '0' is assigned to the station code of RSS0 station 303_0, and the subscriber number whose first digit is '1' is the station code of RSS1 station 303_1. The subscriber call of which the first digit is '9' is assigned to the station code of the RSS9 station 303_9 for call processing.

As described above, when only the first digit of the subscriber number is used, up to nine exchanges can use one station code, but the number of subscribers that can be accommodated for each exchange is obtained by using both the first and second digits of the subscriber number. By subdividing to the extent, it is possible to increase the number of exchanges that can use one station code. When the subscriber number is used up to the second digit as described above, the information of the FSN_DGT stored in the OFI table 117 is changed to accommodate it, and the processor 111 proceeds from step 229 to step 233 while the TDN is changed. You can change the translation request for the first digit to the translation request for information including the second digit.

As described above, the present invention is a switch configured to perform a number translation process by separately separating a country code, a region code, a station code, and a subscriber number, so that one station code can be assigned to a plurality of exchanges. By improving the number translation system, there is an advantage that it is possible to provide an environment that can adaptively improve resource utilization without neglecting a situation where resources of each country are wasted.

Claims (3)

In an exchange configured to perform separate number translation processing for a country code (CC), an area code (TC), a station code (OFC), and a subscriber number (SN) contained in a destination address sent from an originating subscriber, Storing all information related to the station code, including the station code type information defining whether each station code is assigned to a plurality of exchanges or only to the exchanges of the own station; In the case where the station code is assigned to a plurality of exchanges, at least one digit extracted in consideration of all acceptable subscriber numbers per station code, so that routing control can be performed according to the subscriber number carried on the destination address. Allocating routing pointers corresponding to the plurality of numbers; If a setup message is sent from any originating subscriber, analyzing a number type of a called subscriber in the number translation process for the called address included in the setup message; Translating the station code of the called subscriber, if the call is a local call, in the number type analysis; A first search step of searching for the corresponding station code type information by using an information pointer assigned to the called party's station code as a result of translating the station code; Analyzing the station code type information searched in the first search step and performing a local call processing when the corresponding station code is assigned only to an exchange of a local station; As a result of analyzing the station code type information searched in the first search step, if the corresponding station code is assigned to a plurality of exchanges, the digit of the position used when allocating the routing pointer in the subscriber number of the called party Extracting the routing pointer corresponding to the obtained number; A second search step of re-searching the station code type information of the called subscriber by using the extracted routing pointer; Analyzing the station code type information searched in the second search step and performing a local call processing if the corresponding station code is a local station; And if the station code type information searched in the second search step is another station, performing local call processing. The method of claim 1, wherein the number of routing pointers allocated in the step of allocating the routing pointers is equal to the number of exchanges using the station code, and the number of subscribers per station code is acceptable to the plurality of exchanges using the station code. Extracting the digit from the subscriber number so that it can be divided evenly, and assigning the routing pointer to each number defined by the extracted digit. 3. The method of claim 1 or 2, wherein the digit extracts the at least one digit based on the first digit of the subscriber number.