KR100551170B1 - Call Processing Method in Mobile Communication System Using Call Forwarding Service - Google Patents

Abstract

The present invention provides a mobile communication system, such as DCS or PCS, by using a call forwarding additional service, a call forwarding service that enables a call attempt to increase a call success rate even when a called subscriber does not have setup information in a VLR. The present invention relates to a call processing method in a communication system, which translates a number obtained from routing information of a called subscriber in a number translation block in a switching center, and through this number translation, the call processing block requests setup information of the called subscriber to the VLR, resulting in a VLR. If paging fails because there is no setup information in the paging function, if the paging fails, the call forwarding function is continued without stopping the call to check whether the called party has the call forwarding supplementary service function. If you have a forwarding feature, call forwarding It is characterized by maintaining the call state by connecting with the new subscriber, and by using the call forwarding supplementary service function in the call processing function, not only can the call success rate be increased, but also the existing call processing resources can be used without wasting. It is effective.

Description

Call Processing Method in Mobile Communication System Using Call Forwarding Service

The present invention provides a call forwarding supplementary service in a mobile communication system such as a digital cellular system (hereinafter referred to as "DCS") or a personal communication system (hereinafter referred to as "PCS"). A call forwarding service that allows a caller to perform a call attempt to increase the call success rate even if there is no set up information in the Visitor Location Register (hereinafter referred to as 'VLR'). A call processing method in a communication system.

In general, a mobile communication system such as a DCS or a PCS is a communication between mobile stations or a mobile station and a stationary station that can communicate with anytime, anywhere, and anyone using radio waves in a space. As shown in FIG. ), Base station 20, control station 30 having call control block 31, control station matching block 41, call processing block 42, number translation block 43, VLR 44 A mobile service switching center (MSC) 40 and a home location register (hereinafter referred to as 'HLR') having a paging block 45, a call progress block 46, and the like ( 50) and the like.

One of the most important and great features of the mobile communication system configured as described above is to ensure the mobility of the subscriber station, which is a mobile station, to manage the location of the mobile station and to set up a call to a corresponding area when a call is set up. In order to guarantee the mobility of subscribers, location registration and handoff technologies are needed.

The location registration is a procedure in which the mobile station informs the base station of various characteristics such as the mobile network and its state where the mobile station is located, and the handoff is continuously performed even if the mobile station leaves the service area of the base station or sector currently receiving the service. It is a technology for switching the call path between the mobile station and the base station so that it can be maintained.

In particular, the VLR 44 and the HLR 50 is a configuration necessary to ensure the mobility of the mobile subscriber and to manage the subscriber's data above all, the VLR 44 is the mobile subscriber's data to the system area of the subscriber In case of moving to other area while maintaining only the period within the service, the data is deleted. The HLR 50 stores the subscriber's mobility information and additional service information, thereby guaranteeing the subscriber's roaming and various additional services. Performs functions such as providing information.

On the other hand, the call processing process for the conventional called subscriber in the mobile communication system configured as described above with reference to Figure 2, the exchange station 40 receiving the call signal from the call control block 31 in the control station 30 When the control station matching block 41 transmits the call signal of the mobile station to the call processing block 42, the call processing block 42 in the switching center 40 transmits routing information of the called subscriber to the VLR 44. (1), and requests routing information of the called subscriber from the VLR 44 to the HLR 50 again.

According to the request, the call processing block 42 receives routing information from the HLR 50 through the VLR 44 (②), and requests the number translation block 43 to translate the number based on the received routing information. (3), upon receiving the request, the translated number is received from the number translation block 43 to recognize that the called party is registered in the same switching center (4).

Subsequently, the call processing block 42 requests the setup information for the called subscriber to the VLR 44 where the called subscriber is located (⑤), and according to the request, the VLR 44 checks whether there is setup information. If it is confirmed that there is no setup information for the called party, the VLR 44 requests paging to the call processing block 42 to find the called party (6).

In response to the request, the call processing block 42 requests the paging block 45 to perform a paging function to find the called subscriber (⑦).

Subsequently, when the paging block 45 finds the called subscriber within the time out ⑧ and transmits a paging success response signal to the call processing block 42, the paging block 45 continues the call to maintain the call state. If the paging failure response signal is transmitted to the call processing block 42 because the called party is not found, the call cannot be made by stopping the call.

However, as described above, when the VLR information about the mobile subscriber disappears due to location registration and other causes, the call progress rate is increased only when the incoming subscriber is found through the paging function and the call is stopped. In addition to being low, there was a problem of wasting the advanced call processing resources.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its object is to provide a call forwarding supplementary service when a mobile communication system such as DCS or PCS does not find a called subscriber without setup information in the VLR even through a paging function. The present invention provides a call processing method in a mobile communication system using a call forwarding service to increase a call success rate by performing a call attempt for a called subscriber having a call forwarding function.

The call processing method in the mobile communication system using the call forwarding service of the present invention for achieving the above object is to translate the number learned from the routing information of the called subscriber in the number translation block in the switching center and the call processing block If the receiver requests setup information of the called subscriber through the VLR, and as a result, there is no setup information in the VLR and the receiver finds the called subscriber through the paging function, if the paging fails, the called subscriber continues to perform the call forwarding function without stopping the call. If the subscriber has a call forwarding function by checking whether the subscriber has the additional service function, the call forwarding function is used to connect with a new incoming subscriber to maintain a call state.

Hereinafter, a call processing method in a mobile communication system using a call forwarding service according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a mobile communication system for implementing a call processing method in a mobile communication system using a call forwarding service according to the present invention, wherein the control station matching block 41 in the switching center 40 is a control station 30; ), The call processing block 42 processes the outgoing signal of the mobile subscriber or the fixed subscriber, the number translation block 43 translates various numbers necessary for performing the call processing, and the paging block ( 45) performs a function of finding the called subscriber by using the location information of the called subscriber, and the call progress block 46 interrupts the call when the called subscriber has the call forwarding function for the call forwarding additional service used in the present invention. This block allows you to proceed without doing this.

The call processing method in the mobile communication system using the call forwarding service according to the present invention operating in the mobile communication system configured as described above will be described with reference to FIGS. 3 and 4 as follows.

First, when the control station matching block 41 in the switching center 40 receiving the call signal from the call control block 31 in the control station 30 transmits the call signal of the mobile station to the call processing block 42, the switching station The call processing block 42 in (40) requests routing information of the called subscriber to the VLR 44 (1, S1), and sends routing information of the called subscriber to the HLR 50 from the VLR 44 again. Require.

According to the request, the call processing block 42 receives routing information from the HLR 50 through the VLR 44 (2, S2), and translates the number translation by the received routing information into the number translation block 43. (3), and receives the translated number from the number translation block 43 in accordance with this request to recognize that the called party is registered in the same switching center (4).

Subsequently, the call processing block 42 requests information for setup for the called subscriber to the VLR 44 where the called subscriber is located (5, S3), and according to this request, the VLR 44 receives the setup information. (S4) If the setup information for the called party is present as a result, normal basic call processing is performed to maintain the call state (S5, S6), whereas if the setup information for the called party does not exist, the VLR 44 requests paging to call processing block 42 to find the called party (6, S7).

In response to the request, the call processing block 42 requests the paging block 45 to perform a paging function to find the called subscriber (⑦).

Thereafter, if the paging block 45 finds the called subscriber within the timeout ⑧ and transmits a paging success response signal to the call processing block 42, the paging block 45 continues the call to maintain the call state. If the paging failure response signal is transmitted to the call processing block 42 because it cannot be found, the call cannot be made by stopping the call (S8, S9).

So far, the call processing operation described above is the same as in the prior art, and the following operation may be referred to as the core of the present invention.

That is, if the called subscriber is not found through the paging function, the call processing block 42 requests the call progress block 46 to perform the call forwarding function using the call forwarding service (9, S10).

Subsequently, in response to the request, the call progress block 46 requests the VLR 44 to check whether the called party is a subscriber having a call forwarding function (v), and according to the request, the call progress block 46 is called the VLR. Receive a response signal containing information on whether or not the receiving subscriber is to register and activate the additional service from (44) (⑪).

If the called subscriber has a call forwarding service function from the received result, the called party proceeds to a new called subscriber for which call forwarding is performed to perform call processing to maintain a call state (S11 and S12).

However, if the called subscriber does not have a call forwarding service function, a message is sent to the calling subscriber that the current called subscriber is out of the service area and thus the call is impossible (⑫, S11, S13).

As described above, according to the present invention, the call success rate can be increased by utilizing the call forwarding additional service function in the call processing function, and there is an effect that the call processing resource can be used without wasting the advanced call processing resources.

1 is a block diagram of a mobile communication system for implementing a call processing method in a mobile communication system using a call forwarding service according to the present invention;

2 is a diagram illustrating a call processing process for a called subscriber in a conventional mobile communication system;

3 is a view showing a call processing method in a mobile communication system using a call forwarding service according to the present invention;

4 is a flowchart illustrating a call processing process in a mobile communication system using a call forwarding service according to the present invention;

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

10: mobile station 20: base station

30 control station 31 call control block

40: exchange station 41: control station matching block

42: call processing block 43: number translation block

44: VLR 45: paging block

46: progression block 50: HLR

Claims (1)

A control station 30 having a mobile station 10, a base station 20, a call control block 31, a control station matching block 41, a call processing block 42, a number translation block 43, A call processing method for a called subscriber in a mobile communication system including a switching center 40 having an VLR 44, a paging block 45, a call progress block 46, and the like, an HLR 50, and the like. In When the control station matching block 41 receiving the call signal from the call control block 31 in the control station 30 transmits the call signal of the mobile station to the call processing block 42, the call processing block 42 The first step of requesting and receiving the routing information of the called subscriber to the VLR 44, and the number found from the routing information of the called subscriber received in the first step is translated through the number translation block 43, this number In the second step of requesting the setup information of the called subscriber to the VLR 44 through the translation, and if the setup information exists in the VLR 44 as a result of the request of the second step, normal call processing is performed to maintain a call state, If there is no setup information, the VLR 44 requests paging to the call processing block 42 and the call processing block 42 requests paging to the paging block 45; The paging block 45 sends the incoming subscriber within the timeout. If a call is found, the call proceeds to maintain the call state, and if the called party is not found, the call forwarding block 46 requests the call forwarding block 46 to perform a call forwarding function using the call forwarding service; A fifth step of requesting that the progress block 46 confirms whether the called party has the call forwarding function to the VLR 44 and receives the result; and the called party receives the call from the result received in the fifth step. If you have the forwarding service function, the call is forwarded to a new incoming subscriber to which the forwarding service is made and the call is processed to maintain the call state. Calling in a mobile communication system using a call forwarding service, characterized in that the sixth step of sending to Way.