KR20030057733A - Method for screening of incoming call prepix in mobile communication system - Google Patents

Abstract

PURPOSE: A method for screening an incoming call prefix in a mobile communication system is provided to limit a call having a specific prefix among calls incoming through a specific incoming route, thereby protecting the system from a wrong transmitted call from an opponent station. CONSTITUTION: An MSL(Mobile call System Library) transmits a prefix to an NTR(Number Translation)(S101). At this time, the NTR discriminates whether a type of the inputted prefix is an incoming call(S103). If the type of the inputted prefix is an incoming call, the NTR discriminates whether the prefix is registered to the incoming route(S105). Then, if so, the NTR translates the number(S107). Also, the NTR discriminates whether the translated number is screened to the corresponding route(S109). Then, if so, the NTR does not process the screened prefix and considers it as a number translation failure(S111). Then, if not, the NTR processes the call with a general call processing procedure(S113).

Description

Method for screening of incoming call prepix in mobile communication system}

The present invention relates to an incoming call prefix screening method of a mobile communication system, and more particularly, to protect a system from an incorrectly relayed call from a large country by restricting a call having only a specific prefix to a call coming through a specific incoming route. An incoming call prefix screening method is provided.

1 is a block diagram of a general mobile communication system.

As shown in FIG. 1, a mobile terminal 10, a base station controller (BSC) 20, a mobile switching center (MSC) 30, and a home location register (HLR) ( 40).

The mobile terminal 10 is a mobile station which is mobile and fixed, and the mobile terminal 10 is controlled by the base station controller 20 corresponding thereto, and the mobile terminal is free to move to a controllable area in the base station controller 20. (10). The terminal having this function transmits the telephone number of the called terminal (not shown) to the base station controller 20.

In addition, the base station controller 20 controls a plurality of base stations by connecting to a plurality of base stations, and processes the telephone number of the called terminal received from one of the base stations, for example, the base station controlling the mobile terminal 10. After controlling the process, the phone number of the received terminal is transmitted to the MSC (30).

The MSC 30 internally includes a base station controller matching unit 31, a call control unit 32, a number translation unit 33, a subscriber location register (VLR) control unit 34, and a PAP. : Pcs Application Part) The matching unit 35, the overload control unit 36 and the like.

The base station controller matching unit 31 interfaces with the BSC 20 and the call control unit 32 to interface with each other, and transmits the telephone number of the called terminal transmitted from the BSC 20 to the call control unit 32.

The call control unit 32 requests a number translation to the number translation unit 33 to check whether the telephone number of the called terminal transmitted through the base station controller matching unit 31 is a number related to a mobile call or a number related to a wired call. Then, the number translation result message is received from the number translation unit 33 and the PAP matching unit 35 requests the location of the called terminal. In addition, the call controller 32 receives the location request response message of the called terminal from the PAP matching unit 35 and transmits the incoming request message to the VLR controller 34.

Then, the number translation unit 33 is operated by the call control unit 32, and transmits a message to the call control unit 32 as a result of translating the telephone number of the called terminal.

The PAP matching unit 35 interfaces with the HLR 40 and the call control unit 32 to interface with each other. After receiving the position request response message from the HLR 40, the PAP matching unit 35 receives the position request response of the called terminal. Send a message.

On the other hand, if the paging type is on-line by the incoming request message from the call control unit 32, the VLR control unit 34 transmits the overload status request message to the overload control unit 36, and overloads from the overload control unit 36. After receiving the status, determine the overload rating.

In particular, the exchange 30 requires the setup of the call with the called number of the incoming call, for this purpose first translates the called number.

That is, to request the translation of the called number, if the number is translated into the prefix of the called number, if the call is bypassed again by the external exchange, the outbound call is attempted, and in the case of the called country, to have information about the destination in the country. The location information of the destination is requested.

In the case of the incoming call, when a person in an exchange in another area makes a call to the Seoul area using a mobile phone, the other area exchanges the call to the local exchange and sends the called number to the Seoul exchange through the local exchange. At this time, in order to make a call between a person in another country exchange and a person in Seoul, a call is set up from a foreign exchange to a local exchange in Seoul, and a call is entered from the foreign exchange to the local exchange. The outgoing call is called out to the Seoul Bureau of Exchange.

On the other hand, in the case of incoming call to another country, the call is introduced through the specific incoming route to the local exchange, and by registering the specific prefix for the incoming route, it is normal only to the call having the registered prefix of the incoming route. Allow call processing.

Therefore, the conventional mobile communication exchange processes all the incoming calls since there is no incoming call restriction function that selects the prefix of the incoming call from the external foreign exchange and performs the call processing.

However, there was a problem that the operator could not manage separately if the call was incorrect for the call being routed through a certain route.

Accordingly, an object of the present invention is to solve the above-described problems according to the prior art, and an object of the present invention is to call a call incorrectly relayed from a large country by restricting a call having only a specific prefix to a call coming in through a specific incoming route. It provides an incoming call prefix screening method to protect the system from damage.

Features of the incoming call prefix screen method according to the present invention for achieving the above object,

In the incoming call prefix screening method of a mobile communication system having a mobile call system library (MSL) and a number translation (NTR),

The mobile call system library sending a prefix to a number translator;

Determining whether the form of the prefix in which the number translation is input is an incoming call;

Determining whether the prefix is registered in the incoming route if the incoming call is the result of the determination;

Translating the number if the prefix is registered in the incoming route as a result of the determination;

Determining whether the translated prefix is screened on the route;

If it is determined that the number translated prefix is screened in the corresponding route, deeming the number translation failure without processing the screened prefix;

If the prefix is not registered in the outgoing call or incoming route, or if the registered prefix is not screened in the route, the call is processed by a general call processing process.

1 is a block diagram of a general mobile communication system,

2 is a flowchart illustrating an incoming call prefix screening method of a mobile communication system according to the present invention.

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

10: mobile terminal

20: base station controller

30: exchanger

40: Home Location Register

Hereinafter, with reference to the accompanying drawings a preferred embodiment of the incoming call prefix screen method according to the present invention will be described.

2 is a flowchart illustrating a incoming call prefix screening method according to the present invention.

As shown in FIG. 2, a mobile call system library (MSL) transmits a prefix to a number translator (NTR) (S101).

At this time, the number translator (NTR) determines whether the type of the input prefix is an incoming call (S103).

If it is determined in S103 that the incoming call is made, it is determined whether the prefix is registered in the incoming route (S105).

If a prefix is registered in the incoming route, the number is translated (S107).

In operation S109, it is determined whether the translated prefix is screened on the corresponding route.

As a result of the determination in S109, if the number translated prefix is screened in the corresponding route, it is regarded as a number translation failure without processing the screened prefix (S111).

In the prefix screen, a specific prefix is registered for a call coming in through a specific incoming route, so that normal call processing is performed only for a call having a registered prefix of the incoming route. As a method of handling incoming calls by discarding calls, it is possible to restrict incoming calls.

On the other hand, if the prefix is not registered in the outgoing call or incoming route, or if the registered prefix is not screened on the route, the call is processed by a general call processing process (S113).

Detailed description of the incoming call prefix screen method of the mobile communication system according to the present invention is as follows.

First, when a call comes from the outside, it is checked in step S103 whether it is an incoming call. As a result of this check, if the incoming call is not an incoming call, the call is processed by a general call processing process (S113).

Next, if the incoming call is an incoming call entered through a specific incoming route, it is determined in step S105 whether a prefix is registered for the prefix screen function.

If it is determined that the prefix is not registered, the process proceeds to step S113 described above to process the call in a general call processing process.

If the prefix is registered, the number is translated in step S107.

In step S109, it is determined whether the prefix number translated is screened on the corresponding route.

As a result of the determination, if the number translated prefix is screened on the corresponding route, the incoming call entered as the number translation failure is processed.

If the number translated prefix is not screened in the route, go to step S113 to perform general call processing.

As described above, the present invention has an effect of selectively controlling only a call for a specific number with respect to an incoming call transmitted from another exchange.

Therefore, there is an effect that the operator can manage separately when the call is incorrect for the call being relayed through a certain route.

Claims (1)

In the incoming call prefix screening method of a mobile communication system having a mobile call system library (MSL) and a number translation (NTR), The mobile call system library sending a prefix to a number translator; Determining whether the form of the prefix in which the number translation is input is an incoming call; Determining whether the prefix is registered in the incoming route if the incoming call is the result of the determination; Translating the number if the prefix is registered in the incoming route as a result of the determination; Determining whether the translated prefix is screened on the route; If it is determined that the number translated prefix is screened in the corresponding route, deeming the number translation failure without processing the screened prefix; If the prefix is not registered in the outgoing call or incoming route, or if the registered prefix is not screened on the route, the mobile call system comprises the step of processing a call in a general call processing process. Incoming call prefix screening method.