KR940003510B1 - Prefix interpretation method in electronic exchange - Google Patents

Abstract

The method employs an ASS (3) which executes the call process of matching devices, time switch, and signal devices, an INS (2) which executes space switching, number translation, and routine functions, a CCS (1) which executes a operation, maintenance statistics, management of hard disk and input-output devices. The method includes the 1st step which includes a linked list structure of database; the 2nd step which decides a prefix in the system, in analyzing a line state and line categories; the 3rd step which analizes prefix, notifies result, and decides call success; and the 4th step which processes call process by the analyzing result.

Description

How to translate prefixes in the electronic exchange system

1 is a hardware configuration of the electronic switching system to which the present invention is applied.

2 is a structural diagram of a database according to the present invention.

3 is a flowchart of a step of determining whether a prefix is accommodated in a system according to the present invention.

4 is a flowchart of a step of determining whether to allow a call service according to the present invention.

5 is a flowchart of a local call service processing step according to the present invention;

6 is a flowchart of a process of processing a foreign call service according to the present invention;

* Explanation of symbols for main parts of the drawings

1: CCS 2: INS

3: ASS 4: INP

5: NTP 6: ASP

7: SNC 8: NTR

9: PBXC 10: ASC

The present invention relates to a prefix translation method which is a number translation function in an electronic switching system.

Prefix translation is a function of determining the called party by translating the received number when the subscriber who is accepted in the system has picked up the receiver and sent the number of the subscriber who wants to talk or received a digit from the incoming call. At the same time, it was not possible to give the desired station number freely by restricting the prefix that is accepted by the system.If a call was made to the same area within the area and the area code was sent, the call could not be established, or the call was made to the relay station. Unnecessary trunk occupancy occurred because the call was taken and established. Therefore, it must be added to inform the time point of the relay line occupancy, where the call is established without unnecessary relay line occupancy and the minimum trunk occupancy time can be guaranteed, and the provision of prefix translation function, which is not limited by number planning or number system, is added. There was a problem that should be.

The present invention devised to solve the above problems is a number plan and numbering system which is revived by various demands of subscribers who are receiving voice and non-voice services of large-capacity electronic exchange technology with the development of electronic and communication technology which is rapidly developing. The database structure for the station number translation function is configured as a double linked list structure to accommodate the maximum number of flexibility in the numbering and numbering system, the memory can be efficiently used, and the call can be established without occupying the relay line. For the call, specify the point of time for the occupied relay line to prevent the occupying of the relay line, and to prevent the occupancy of the relay line longer than necessary to prevent the relay line runaway caused by the large number of relay lines. You can change the point of occupying the relay line from time to time. Rock, and it is an object to provide a prefix translation how to establish a call without occupying the trunk even if an outgoing call attempt when the local area code in the same in the region.

In order to achieve the above object, the present invention provides an ASS (Access Switching Subsystem) for performing a call processing function with a subscriber and a relay line matching device, a time switch, and a signal device, and a space switch function for connecting the ASSs with each other. Interconnection Network Subsystem (INS), which performs number translation and routing functions, and Central Control Subsystem (CCS), which manages and manages system-level operations, maintenance, billing, statistics, hard disk management, and I / O devices. A prefix translation method for a call service of an electronic switching system, comprising: a first step of constructing a double linked list structure of a database for prefix translation so as to provide maximum flexibility in number planning and number system Receives prefix translation request and analyzes line status and line category of calling subscriber A second step of determining whether or not a prefix, a third step of notifying a result by analyzing the type of the prefix if the prefix is accepted in the digit analysis result system, and determining whether the call is established, and analyzing the call type According to the analysis result, the fourth step of obtaining and processing the information for establishing the home and outgoing call is performed.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

1 is a hardware diagram of an electronic switching system to which the present invention is applied, 1 is a Central Control Subsystem (CCS), 2 is an Interconnection Network Subsystem (INS), 3 is an Access Switching Subsystem (ASS), and 4 is an INP (Interconnection Network). Processor (5), 5 is Number Translation Processor (NTP), 6 is Access Switching Processor (ASP), 8 is Number Translation (NTR), 9 is Private Brasch Exchange Control (PBXC), and 10 is Analogue Subscriber Control (ASC). .

The electron exchanger to which the present invention is applied is composed of three subsystems of ASS (3), INS (2), and CCS (1) as shown in FIG. The ASS 3 is composed of an ASP 6 in which the ASC 10 is located. The ASS 3 is a subsystem that performs call processing functions such as subscribers and trunk line matching devices, time switches, and various signaling devices.

The INS (2) is composed of an INP (4), NTR (8) and NTP (5) in which the PBXC (9) is located, and is located in the center of the system and the space switch function and the number connecting the ASS (3) mutually In charge of translation and routing functions.

The CCS 1 is responsible for the functions of system management, maintenance, billing, statistics, management of hard disks, and input / output devices.

The processor to which the present invention is applied is the NTP (5), wherein the NTP (5) receives the number system and the route of the public telephone network, and analyzes the subscriber's digit information and the signal information between stations to search the location of the caller and the called party. NTR block (8) that performs number translation and RCO (Route Control) block (not shown) to control the origination and reception of group subscribers such as private branch exchange (PBX) and private branch exchange (PBX). And PBXC block 9 for controlling group subscriber reception.

2 is a structural diagram of a database according to the present invention.

As shown in FIG. 2, the database for prefix translation in which the present invention is implemented, accesses the first tuple with the first digit among the digits received in a double linked list structure in which each digit of the prefix is linked to each other. Analyze the state (11) to determine whether the next tuple is linked to the digit, determine the next point value (12), access the tuple corresponding to the point value and the next digit, and continue to link between the digits, corresponding to the last digit. The prefix digit state of the tuple is marked at the end of the link, and the back digit is also linked to each other (13). The memory can also be used efficiently, and the structure is not restricted by the combination of numbers or the length of the numbers.

3 is a flowchart of a step of determining whether or not a prefix is accommodated in a system according to the present invention, and determines whether the received prefix received a prefix translation request is a number accommodated in the system.

First, if the prefix translation request is received (31), the calling party receives the calling line information of the calling subscriber and the digits (prefix) for translation (32) and analyzes the calling subscriber's line status and line category. It determines whether the subscriber can receive the service (33). If the outgoing subscriber is a CENTREX subscriber who is a local exchange system that uses the data processing power of the exchange system to group subscribers and provides business services such as a private exchange (PBX) to the subscribers in the group, the Centrix number. The translation is performed (34), and if the subscriber is eligible for general call service, the first digit of the received digit is retrieved (35) and the digit analysis begins (36). Analyze each prefix one by one until it is determined whether or not the prefix is accepted by the system (37, 38). At this time, even if all the received digits are analyzed, if the plate size does not appear, the digit length required for translation is obtained (39) and the sender receives a digit as much as the corresponding digit length and requests translation (40). In the digit analysis result 37, if the number is not accepted by the system, the number is notified to the calling party (41), and in the case of a changed prefix, the user is requested to inform that the prefix has been changed (42).

4 is a flowchart of a call service acceptance determination step according to the present invention, which shows the determination of call service establishment when the digit analysis result 37 indicates that the prefix is accepted in the system.

If the digit analysis result 37 determines that the prefix is accommodated in the system, the type of the prefix is analyzed (43). If the prefix type analysis result 43, the special service registration cancellation code (44), the corresponding special service registration and cancellation notification (44), if the code for the subscriber line test, the subscriber line test notification (45), the magnetic number If the user wants to receive the call service, his / her own phone number is notified (46). Also, if it is a local area code, the prefix translation is attempted again with numbers other than the area code (47, 48). If it is a general prefix, determine the type of call (local call, local call, intercity call, international call) (50), and determine the call establishment by comparing the dial limit, that is, the class of the calling line and the call type of the determined prefix. (51). If the calling class is lower than the call type, a call restriction notification is made (52).

5 is a flowchart of a local call service processing step according to the present invention, which illustrates a process of processing a native call service after the call establishment decision (51).

After determining the call establishment (51), by analyzing the call type (53), and whether it is a home call or outgoing call, if it is a home call, determine a call number translation start point for call forwarding number translation (54), and establish a home call After obtaining the minimum and maximum digit length and prefix length and the billing information to be received as information for 55, the local party notifies the call to the calling party (56).

6 is a flowchart of a process of processing a foreign call service according to the present invention, and shows a step of processing the call type analysis result 53 when the outgoing call is made.

Analysis result of the call type (53) In the case of outgoing call such as other foreign calls, intercity foreign calls, international calls, etc., the minimum and maximum number of digits and route numbers to be received, billing information, relay point occupied and deleted ) Determine the length of the digit (57), analyze the point of time of occupying the relay line (58), if the received digit is more than or equal to the point of occupancy of the relay line, notify the outgoing call (59), and route the routing request directly to the outgoing measurement. To occupy the relay line (60), and if the relay line is smaller than the occupied time point, the number of occupied digits and information already obtained are notified to the calling party (61). A message requesting the calling party to make an occupancy request.

The present invention constructed and operated as described above configures a database structure for prefix translation into a double linked list structure, linking prefix digits to points, and efficiently using memory without restricting the length and number combination of numbers. In order to ensure maximum flexibility in translation planning and numbering system when installing stations, it is necessary to determine the point of occupation of the relay line during the prefix translation stage to ensure the minimum time of occupying the relay line when constructing relay calls. By changing the occupied point of the relay line, it is possible to prevent the runaway runaway phenomenon caused by the occupancy of a large number of relay lines, and to make a call without occupying the relay line when a local area code is sent to the same area within the region. It works.

Claims (4)

ASS (Access Switching Subsystem) (3) which performs call processing function with subscriber and relay line matching device, time switch, and signaling device, and space switch function and number translation which connects ASS (3) with each other in the center of system , Interconnection Network Subsystem (INS) that performs routing functions, and Central Control Subsystem (CCS) that manages system-level operations, maintenance, billing, statistics, and management of hard disks and I / O devices. In the prefix translation method for the call service of the electronic switching system consisting of (1); The first step (figure 2) of constructing a double linked list structure for prefix translation to give maximum flexibility in number planning and numbering system. Step 2 (figure 3), which determines whether the prefix is accommodated in the system by analyzing the line category. If the prefix is the result of the digit analysis, the type of the prefix is analyzed and the corresponding result is notified. By the third step (figure 4) to decide whether or not, and the fourth step (figure 5 and 6) by analyzing the call type and obtaining and processing the information for establishing the own call and outgoing call according to the analysis result Prefix translation method, characterized in that performed. The method of claim 1, wherein the second step of determining whether or not the prefix is accommodated in the system (figure 3) receives a prefix translation request and stores and analyzes line status and line category information and prefix of the calling subscriber. (31, 32, 33, 34), if the originating subscriber is a Centrix subscriber, performing the Centrix number translation; if the originating subscriber is a general call subscriber, the received digits are analyzed one by one from the first digit and received in the system. Determining if the prefix is a prefix change, and notifying if the prefix is unacceptable (35, 36, 37, 38, 41, 42), and analyzing all the digits received when the prefix translation is requested. If it is not possible to determine whether or not the prefix is contained within, the length of the digit required for analysis is obtained, and the digit length is returned to the received digit. Prefix translation method being performed by a step (39, 40) so as to scan the translation request. The method of claim 1, wherein the third step of determining whether the call is established (figure 4) analyzes the type of prefix so that the type of prefix is registered and canceled by special service, subscriber line test, self number call, And notifying the result of the analysis in case of a special number translation (43, 44, 45, 46, 49). If the type of the prefix analysis result indicates that the prefix is a local area code, the prefix is prefixed to the remaining numbers except for the corresponding area code. Retrying the translation (47, 48), and if the prefix type analysis result is a normal prefix, obtains the call type, and compares the call type of the translated prefix with the call type of the translated prefix (50, 51, 52) Prefix translation method characterized in that performed by. The method of claim 1, wherein the fourth step (FIGS. 5 and 6) processing according to the call type analysis result comprises: analyzing the call type (53); (54, 55, 56) to obtain the origination translation start point and prefix length for the incoming call, and to obtain the information for establishing the own call, and to notify the calling party to the calling party; and, if the call type analysis result is the outgoing call, If the received digit is more than or equal to the point of occupying the relay line, the caller is notified to the calling party and the routing request is requested directly to the outgoing relay to occupy the relay line. If it is smaller than the occupation point of the relay line, receiving the digits for the number of relay line occupancy points and requesting the relay line occupancy to the outgoing side (57, 58, 59, 60, 6). Prefix translation method characterized in that performed by 1).