KR960014691B1 - Number translation method for mobile telephone - Google Patents

Abstract

In the method for translating number in mobile communication exchange including an ASS(Access Switching Subsystem) 11, an INS(Interconnection Network Subsystem) 12, a CCS(Central Control Subsystem) 13, an AMS(Adminstration and Maintenance Subsystem) 14, a LRS(Location Registration Subsystem) 15, an ASP(Access Switching Processor) 16, a NTP(Number Translation Processor) 17, a MSA(Mobile Subscriber Signaling Access) 18, a MCC(Mobile Call Control) 19 and a NTR(Number TRanslation), the method comprises the steps of: discriminating a prefix by searching a prefix table when receiving a prefix translation request at a subscriber stage; processing and stopping the operation according to a normal prefix when a prefix type is the normal prefix; processing and stopping the operation according to a local network identification code when the prefix type is a local network code(Lcl_Net_CD); processing and stopping the operation according to a time identification code when the prefix type is the time identification code(Net_CD); and processing and stopping the operation according to a roaming number when the prefix type is a roaming identification code(Roaming_Net_C).

Description

Number Translation Method in Mobile Switching System

1 is a structural diagram of a mobile communication switch to which the present invention is applied.

2 is a procedure for assigning roaming numbers when roaming subscribers.

3 is a procedure for taking an MSRN from a number of called subscribers in a call.

4 is a process flow diagram for a subscriber number translation method according to the present invention.

5 is a detailed flowchart of FIG.

* Explanation of symbols for main parts of the drawings

1a: NTR (Number translation)

11: ASS (Access Switching Subsystem)

12: INS (Interconnection Network Subsystem)

13: central control subsystem (CCS)

14: Administration and Maintenance Subsystem

15: Location Registration Subsystem (RLS)

16: Access Swutching Processor (ASP)

17: Number Translation Processor (NTP)

18: Mobile Subscriber Signaling Access (MSA)

19: MCC (Mobile Call Control)

The present invention relates to a number translation method in a mobile communication switch that allocates a roaming number when registering a location for call occupancy to a mobile subscriber station during call processing of a mobile communication switch, and the exchange translates the roaming number to find a called route. will be.

In the case of the conventional public switching telephone network (PSTN) network, since the subscriber line is fixed, the subscriber required in another country has decided the call route by translation of the number. However, in the mobile communication network, the location of the mobile subscriber and the subscriber's information should be stored and the call should be set to the mobile exchange.

At this time, the roaming number for the subscriber number is assigned while changing the location, and the incoming route is established by translating the roaming number.

Subscriber information includes HLR (Home Location Registration) for storing registered subscriber information and Visitor Location Registration (VLR) for visitors managed by a moving exchange.

When a mobile subscriber moves, information is exchanged between the VLR and the HLR by location registration.

The HLR allocates and stores a Mobile Subscriber Roaming Number (MSRN) as information to the mobile exchange.

This MSRN is used as information for determining the destination route.

The present invention devised to satisfy the above-described requirements, the mobile communication switch that roaming number for the subscriber's number is updated in association with the exchange, and it is possible to simultaneously translate the roaming number or subscriber number coming through the relay line The purpose is to provide a number translation method in.

In order to achieve the above object, the present invention provides an Access Switching Subsystem (ASS), an Interconnection Network Subsystem (INS), a Central Control Subsystem (CCS), an Administration and Maintenance Subsystem (AMS), a Location Registraion Subsystem (LRS), and an Access Swutching (ASP). A number translation method applied to a mobile communication switching system including a processor, a number translation processor (NTP), a mobile subscriber signaling access (MSA), a mobile call control (MCC), and a number translation (NTR), wherein A first step of identifying a prefix by looking for a prefix table when a fix translation request is received; After performing the first step, if the prefix type is a normal prefix (NORMAL), ending the process after the processing according to the general prefix; After performing the first step, if the prefix type is the local network code Lc1_Net_CD, terminating after processing according to the local network identification code; A fourth step of ending after processing according to the time identification code if the prefix type is the other identification code (Net_CD) after performing the first step; A fifth step of ending after the first step if the prefix type is a roaming identification code (Roaming_Net_CD) after processing according to the roaming number; Characterized in that comprises a.

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

1 is a structural diagram of a mobile communication switch of an electronic switching system to which the present invention is applied, and includes three DMLs including an access switching subsystem (ASS), an interconnection network subsystem (INS), and a central control subsystem (CCS). It consists of subsystems.

The ASS 11 is a subsystem that performs call processing functions such as subscriber and relay line matching devices, time switches, and various signaling devices.

INS 12 is located in the center of the system is responsible for the space switch function, number translation, routing function that connects the ASS.

CCS (13) is divided into Administration and Maintenance Subsystem (AMS) (14) and Location Registration Subsystem (LRS) (15). The AMS (14) is a system-level operation management, maintenance, billing, statistics functions and hard disks. The LRS is a subsystem added to the mobile communication exchange, and manages location registration and subscriber information of the mobile subscriber.

Access Swutching Processor (ASP) belonging to ASS (11) includes Mobile Subscriber Signaling Access (MSA) 18 and Mobile Call Control (MCC) 19, and MAS 18 serves as an interface for No. 7 signals coming from subscribers. It converts into exchange message.

The MCC 19 receives the message from the MSA 18, sets up the call path, and controls the call until the subscriber releases the call through the called party.

The NTP (Number Traslantion Processor) 17 in the INS 12 performs number translation, routing, and destination subscriber paging functions.

The NTR (Number transiation) 1a to which the present invention is applied is mounted in this processor to perform subscriber prefix called number translation.

2 is a flowchart illustrating a process of allocating roaming numbers when roaming subscribers.

As the subscriber moves, information is exchanged between the HLR and the VLR. When the subscriber registers a location registration request from the exchange to the VLR (21), the VLR requests a registration to the HLR and allocates an MSRN (22, 23).

HLR acts as a registered home address and has mobile swiitching centor (MSC) information that is moved when the subscriber moves. The information is included in the mobile subscriber roaming number (MSRN). Use as.

The MSRN numbering system consists of 14 digits 09 (MSRN Recognition Code) + X + XXX (Mobile Exchange Prefix) + yyyyyyyy (MDN) and the translation of the Mobile Exchange Prefix determines the called route.

3 is a process of bringing the MSRN from the number of the called subscriber to the call.

A translation request is made to the NTR by a mobile subscriber number (MDN) from the mobile phone (31). At this time, if the call goes to the PSTN, outgoing call processing is performed (39). If the call is a mobile subscriber, the mobile call notification is sent (32) to find a moved position. If it is determined to be a mobile call, it requests routing information from the HLR (33). The HLR determines whether the subscriber exists and, if present, sends an MSRN containing information of the station to which the subscriber has moved (34).

The MSRN makes a translation request to the NTR (35) to get routing information. In other words, if the translated prefix of the MSRN is translated (35), it can be known whether it is a local call or a foreign call. If it is a local call (36), the subscriber information request is processed by the internal VLR (37, 38).

4 is a process flow diagram for the number translation method according to the present invention.

When the subscriber end receives the prefix translation request (41), the prefix table is first found (42), and the prefix information table indicated by the table is found (43). Prefix types are broadly classified into general prefix (NORMAL) local network code (Lc1_Net_CD), other network identification code (Net_CD), and roaming identification code (Roaming_Net_CD). After the normal prefix processing 45, the local network identification code processing 46, the other network identification code processing 47, and the roaming number processing 48 are performed according to each prefix type, the processing ends.

5 is a detailed procedure of FIG. 4.

The method of requiring prefix translation at the subscriber end depends on the characteristics of the subscriber. That is, if a subscriber with a mobile phone presses the called party number, the entire subscriber number is entered, and the prefix translation stage accesses only a part of it, and when translating a call from a test subscriber, the required number is requested to the subscriber. .

If a prefix translation request comes from the subscriber (51), a link to the prefix is searched for (52). If the link is broken halfway, it is determined that the prefix does not exist and the abnormal call is processed (53). If present, the information table point pointed to by the prefix table is found (54).

The prefix type of the information table is divided into normal Lc1_Net_CD, Net_CD, and Roaming_Net_CD.

The subscriber type identification number may or may not be pressed, so the prefix type may be NORMAL or Lc1_Net_CD even when a translation request is received in MDN. In the case of NORMAL, if the prefix type of the previous step was Lc1_Net_CD, the operator identification code is pressed. When the mobile subscriber call is notified, the number of codes is set to 0 to indicate that the received digit is the mobile subscriber MDN.

If the subscriber identification code is not pressed, the default system code is assigned to the subscriber's incoming code (56).

The mobile call notification indicating the subscriber mobile subscriber is transmitted (57).

Lc1_Net_CD calculates the number of digits received and the number necessary for translation (58) and requests more digits (59) if more digits are needed. After receiving the number of translations, translate the next prefix (60).

If the prefix type is Lc1_Net_CD or Net_CD, abnormal call processing is performed. This is because the same prefix type cannot follow Lc1_Net_CD (62, 63). If the N prefix type is NORMAL, mobile call notification is made (64, 65).

Net_CD This is the case when going to other networks such as ISDN and PSTN. The dial limit of the subscriber is compared with the call type of the prefix (66). If the subscriber is out of range for dialing, or if the call type is a local call, an abnormal call is handled (67).

If the call is within the restricted range, the route number, digit minimum value, maximum value, etc. required for the routing process are obtained (68), the outgoing call 69 is notified to the subscriber, and the routing request is made (70).

Roaming_Net_CD finds routing data of mobile switching period by number with subscriber's location information.

If the subscriber's call limit is less than the call type, the abnormal call is processed (71). If the call limit is large, the call type is determined (72), and if the call is owned, the subscriber is notified of the call. In the case of a call going out to another country, a route number, digit minimum value, and maximum value information necessary for routing are allocated (74), outgoing call processing (75), and a routing processing request (76).

Therefore, the present invention, which operates as described above, determines the mobile subscriber and the other subscriber in advance in the process of translating the subscriber's number, and in the case of the mobile subscriber, the procedure and data structure to simultaneously accommodate the two number systems of MDN and MSRN. Unified.

Claims (6)

Access Switching Subsystem (ASS) (11), Interconnection Network Subsystem (INS) (12), Central Control Subsystem (CCS), (13) Administration and Maintenance Subsystem (AMS) (14), Location Registration Subsystem (LRS) (15) , Access Swiuching Processor (ASP) 16, Number Traslantion Processor (NTP) 17, Mobile Subscriber Signaling Access (MSA) 18, Mobile Call Control (MCC) 19, Number Translation (NTR) 1a A number translation method applied to a mobile communication switching system including: a first step of identifying a prefix by finding a prefix table when a subscriber translates a prefix translation request; After performing the first step, if the prefix type is a normal prefix (NORMAL), ending the process after the processing according to the general prefix; After performing the first step, if the prefix type is the local network code Lc1_Net_CD, terminating after processing according to the local network identification code; A fourth step of ending after processing according to a time identification code if the prefix type is a timing identification code Net_CD after performing the first step; A fifth step of ending after the first step if the prefix type is a roaming identification code (Roaming_Net_CD) after processing according to the roaming number; Number translation method in a mobile communication switch, characterized in that comprises a. The method of claim 1, wherein the first step comprises: a first step of determining whether a link exists by finding a link of a prefix when a prefix translation request is received from a subscriber end; After performing the first process, if the link is broken halfway, it turns out to be a prefix that does not exist, and terminates after abnormal call processing. If there is, a second table for identifying the prefix type by searching for an information table point indicated by the prefix table process; A number translation method in a mobile communication switch, characterized in that comprises a. The method of claim 1, wherein the second step comprises: a first step of examining a prefix type of a previous step; A second step of allocating a default system code to a subscriber's incoming code after notifying the subscriber of the first step and notifying the subscriber of the mobile call and ending; A third step of, after performing the first step, transmitting and terminating a mobile call notification notifying that the subscriber is a mobile subscriber if it is a local network identification code; A number translation method in a mobile communication switch, characterized in that comprises a. The method of claim 1, wherein the third step comprises: a first step of calculating a number of digits received and a number required for translation; A second step of performing a first digit (MordDgt) request to the subscriber end after the first step is performed; After performing the first process, if the number of translations received, the third process of translating the next prefix and checking the prefix type, if the prefix type is the local network identification code after performing the third process, the process ends after abnormal call processing A fifth step of, after performing the fourth step and performing the third step, notifying of a mobile call and ending if the prefix type is normal; A number translation method in a mobile communication switch, characterized in that comprises a. The method of claim 1, wherein the fourth step comprises: a first step of checking whether a call type value is greater than a call dial limit value; A second step of ending after an abnormal call processing if the subscriber is out of a range capable of dialing or if the call type is 0 as a local call after performing the first step; A third step of, after performing the first step, if the call is within a limited range, obtaining a route number, a digit minimum value, a maximum value, etc. required for the routing process, notifying the calling party of the outgoing call and ending the routing request; A number translation method in a mobile communication switch, characterized in that comprises a. The method of claim 1, wherein the fifth step comprises: a first step of checking whether the subscriber call restriction range is smaller than the call type; A second step of processing an abnormal call and ending if the subscriber's call limit is smaller than the call type after performing the first step; After performing the first step, if the call range is large, the call type is determined and if the call is a home call, the subscriber is notified of the call. If it is a foreign call, the routing data is set, the outgoing call is notified between the subscribers and the routing block is routed. Requesting and terminating the third step; A number translation method in a mobile communication switch, characterized in that comprises a.