KR0158115B1 - Method for processing call transit in wireless private exchanger - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

It relates to a wireless private exchange.

2. The technical problem to be solved by the invention

When the location information of the wireless private exchange is different from the actual location of the wireless terminal, when the wireless terminal requests an outgoing call during the incoming call to the wireless terminal to form a call, the incoming call is transferred by the wireless private exchange which the incoming service preferentially processes. Provide a conversion processing method.

3. Summary of the Solution of the Invention

In the case where the actual to-be-called wireless terminal in the wireless private exchange does not match the location of the corresponding service area and the location information in the switching system, when the incoming request and the outgoing request of the called wireless terminal are simultaneously generated, the incoming service is processed first. The method comprises the steps of retrieving the location of the called terminal and supporting the call to the port of the base station when the call request terminal requests the called wireless terminal in the terminal state information that the called wireless terminal is in a ring state. And, when the called wireless terminal makes a call request and when it is confirmed in the terminal state information that the called wireless terminal is in a ring state, a call path between the call request terminal and the called wireless terminal is formed due to a call transfer function. The process takes place.

4. Important uses of the invention

In the wireless private exchange, when incoming and outgoing calls are simultaneously generated from wireless terminals having different locations by automatic location registration, the call transfer function is implemented to first process the incoming service.

Description

How to Handle Call Switching in Wireless Private Switching System

1 is a block diagram of a typical wireless private exchange.

2 is a flow chart showing a call transfer processing method in a wireless private exchange in accordance with the present invention.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless private exchange, and more particularly, to a method of switching a call so that a call service can be performed even when the location information in the switching system and the actual location of the wireless terminal are different.

A block diagram of a typical wireless private exchange is shown in FIG. Hereinafter, a description will be given with reference to FIG. 1.

The wireless private exchange stores a CPU 10 that performs the exchange function and overall control operation of the wireless private exchange, stores data generated during the service of the wireless private exchange, establishes a system database, and establishes terminal state information (ring state, call). And a memory unit 30 for storing the current state information of each terminal, an overall operation control program of the wireless private exchange, and an interface unit 20 for buffering and interfacing data generated during program execution. And supplying call power to the wired terminals 50-1, 50-n and controlling the wired terminal 50-1,... Under the control of the CPU 10. The subscriber circuit 50 for interfacing the 50-n and the switch, and the base stations 80-1, 80-2,... Under the control of the CPU 10. , The radio access device 80 for interfacing the 80-n and the switch, and the base stations 80-1, 80-2,... Which connect the wireless terminal 80-A, 80-B and the switch. , 80-n, and base stations 80-1, 80-2,..., Interfacing the wireless terminals 80-A, 80-B and the wireless access device 80 under the control of the CPU 10 and having at least one assigned channel assigned thereto. And a switching circuit 40 for time division multiplexing signals (Sinnal) and voice data under the control of the CPU 10 to form a communication path, and various communication signals (dial tone, busy tone, ring back) under the control of the CPU 10. tone supply circuit 90), the subscriber circuit 50 and the base station 80-1, 80-2,... A DTMF receiving circuit 70 for converting the DTMF signal of the terminal generated through 80-n into a digital signal and outputting the digital signal to the CPU 10, and transmitting DTMF data under the control of the CPU 10. A circuit (DTMF Sender) 100 and a trunk line loop which is under the control of the CPU 10 to form a trunk line loop, and performs interfacing during the exchange period with the trunk line, the subscriber circuit 50 and the radio. The ring generating circuit 110 supplies a ringing signal to the connecting device 80.

And base stations 80-1, 80-2,... , 80-n is given a service area according to each base station. That is, the base station 80-1 performs the switching service for the wireless terminal located in the first area, the base station 80-2 performs the switching service for the wireless terminal located in the second area, and the base station 80-n performs the Exchange service is performed for wireless terminals located in area 3.

It looks at the process for the incoming service to the wireless terminal 80-A, 80-B in the wireless private exchange as described above.

Base stations 80-1, 80-2,... The exchange system stores the location information of the wireless terminal 80-A and 80-B through automatic location registration between the 80-n and the wireless terminal 80-A and 80-B. That is, the wireless private exchange and the wireless terminals 80-A and 80-B exchange location information with each other at regular intervals. Thus, when the information on the position of each other is compared and judged, the base stations 80-1, 80-2,... 80-n requests the database update for the new location information of the wireless terminal to the memory unit 30 of the wireless private exchange.

However, base stations 80-1, 80-2,... The location information is exchanged between the 80-n and the wireless terminal 80-A and 80-B at regular intervals. If the actual position of the wireless terminal changes between the predetermined periods, the actual location of the wireless terminal until the next cycle begins. The positional information stored in the memory unit 30 of the switching system is different.

The wireless switching system controls the base station 80-1 at regular intervals and stores the wireless terminal 80-A location information of the first area in the memory unit 30. In this case, if a call request is generated in the wireless terminal 80-A after the mobile terminal 80-A moves to a second area between the predetermined periods, the conventional call processing method is performed by any call request terminal. When an incoming call is requested to the wireless terminal 80-A, the terminal searches for location information stored in the memory unit 30. Thus, a ring is generated to a port of the corresponding base station 80-1. At this time, even if the wireless terminal 80-A in the second area actually requests transmission, the wireless private exchange continues to ring the port of the base station 80-1. Thus, a problem arises that the user cannot recognize the call even when the call is generated in the wireless terminal 80-A whose position has been changed.

Therefore, an object of the present invention is that when the location information of the wireless private exchange and the actual location of the wireless terminal is different from the incoming call to the wireless terminal to make a call in the process of incoming call to the call to establish the incoming call and the incoming service preferentially The present invention provides a call transfer processing method in a wireless private exchange.

In order to achieve the objects of the present invention, when the actual talked wireless terminal in the wireless private exchange does not match the location of the service area and the location information in the switching system, the incoming and outgoing request of the called wireless terminal occurs simultaneously. If a call request terminal requests a call to the called wireless terminal, the called terminal searches for the location of the called terminal and instructs the call to a port of the base station. The call request terminal and the call request terminal due to a call forwarding function when the step of storing in the terminal state information that the ring state, the called wireless terminal is called out, and when the called wireless terminal in the terminal state information is confirmed that the ring state In the process of forming a call path of the called wireless terminal Characterized in that where the lure.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that like elements in the drawings represent like reference numerals wherever possible.

As used herein, the term "call forwarding" indicates that a call is changed by first processing an incoming service when the wireless terminal requests an outgoing call to a wireless terminal having a different location information from the wireless private exchange.

A flowchart of the call transfer processing method in the wireless private exchange according to the present invention is shown in FIG. Hereinafter, a block diagram of a wireless private exchange for carrying out the present invention will be described with reference to FIGS. 1 and 2.

Herein, it is assumed that the wired terminal 50-1 is a call request terminal which is a calling terminal and the wireless terminal 80-A is a called terminal whose called terminal. In this case, when the position movement of the wireless terminal 80-A occurs from the first area to the second area between predetermined periods for registering location information, the call processing method according to the present invention is performed.

In the situation described above, a call is received from a wireless private exchange and a call is performed.

When the call request terminal 50-1 hooks off in step 211, the CPU 10 recognizes the hook-off state of the call request terminal 50-1 through the subscriber circuit 50, and controls the switching circuit 40 to control the call. The channel of the request terminal 50-1 is formed. Thereafter, when the subscriber of the call request terminal 50-1 dials the extension number of the called terminal 80-A, it is applied to the DTMF receiving circuit 70 through the subscriber circuit 50 and the switching circuit 40, and the DTMF receiving circuit 70 dials. Converts the DTMF signal generated by the digital data into digital data and applies it to the CPU 10. CPU 10 then analyzes the dialed extension. In step 212, the CPU 10 stores the information of the requested wireless terminal 80-A in the terminal state information area of the memory unit 30. That is, the wireless private exchange exchanges and stores that the requested wireless terminal 80-A is in a ring generation state by the current call. The CPU 10 searches for the location information of the requested wireless terminal 80-A stored in the memory unit 30 by performing the automatic location registration in step 213. Under the control of the CPU 10, the ring generating circuit 110 generates a ring signal as a radio wave to the base station 80-1 by the radio access device 80, and the tone supply circuit 90 generates a ring back tone to the call request terminal 50-1.

At this time, if the called wireless terminal 80-A located in the second area hooks off for the call request in step 214, the CPU 10 hooks off the called terminal 80-A through the base station 80-2 and the wireless access device 80. In step 215, the CPU 10 checks whether there is an idle port in the base station 80-2. When the idle port does not exist in the base station 80-2, the CPU 10 controls the base station 80-2 to service the to-be-called wireless terminal 80-A in step 216. However, when there is an idle port of the base station 80-2 in step 215, the CPU 10 controls the switching circuit 40 to form a channel of the called wireless terminal 80 -A. In step 217, the CPU 10 stores the terminal information of the to-be-called wireless terminal 80-A in the terminal state information area of the memory unit 30. At this time, the CPU 10 continuously searches for the terminal state of the called wireless terminal 80-A in the ring state by the call request terminal 50-1 in step 218, and the called terminal by the call request terminal 50-1 is connected to the wireless terminal 80-A. If it is confirmed as A, step 218 is transferred to step 220. On the other hand, when the called wireless terminal 80-A is not in the ring state in step 218, when the called wireless terminal 80-A is not in the ring state in step 219, the digit by the subscriber of the called wireless terminal 80-A in step 219 ( The corresponding service is performed according to the digit) input. In step 220, the CPU 10 sends a ring disconnect message through the radio access device 80 to a port of the base station 80-1 which issues a call instruction and transmits a ring occurrence as a radio wave. Thereafter, the CPU 10 transmits the state information conversion message to the port of the call request terminal 50-1 when the ring disconnect message is received from the base station 80-1 through the wireless access device 80 in step 221. In step 222, the CPU 10 transmits a call start message to the port of the called base station 80-2, and transmits a call confirmation response message to the port of the call request terminal 50-1 in step 223. That is, the process of steps 220 to 223 is a call processing process of the CPU 10 performing the call transfer function.

The CPU 10 controls the switching circuit 40 to form a call path between the call request terminal 50-1 and the to-be-connected wireless terminal 80-A to perform an extension call.

As described above, when the location information of the wireless terminal checked by a certain period in the wireless private exchange and the actual location of the wireless terminal are different, a call request is requested by the call requesting terminal. If it attempts to occupy, the call transfer function is connected to the incoming call instead of the call service, and the call service is performed first. Therefore, the reception rate, which is a big problem in the wireless private exchange, can be increased.

Claims (5)

In the case where the actual to-be-called wireless terminal in the wireless private exchange does not match the location of the corresponding service area and the location information in the switching system, when the incoming call and the outgoing request of the called wireless terminal are simultaneously generated, the incoming service is processed first. In the method, when a call request terminal requests a call to the called radio terminal, the terminal searches for the location of the called terminal and instructs the call to a port of the base station, and stores the called radio terminal in a ring state in the terminal state information. The call request terminal and the called wireless terminal due to a call transfer function when it is determined that the called wireless terminal is requested to be called and the called wireless terminal is ringed in the terminal state information. In the wireless private exchange, characterized in that the process is formed Call method switching process. The method of claim 1, wherein the call transfer function comprises: transmitting a ring disconnection message to the corresponding base station port when the called terminal is confirmed to be in a ring state; Transmitting a status information conversion message to a port, transmitting a call start message to the ported wireless terminal after transmitting the state information conversion message, and transmitting the call start message to the call request terminal port. Call forwarding processing method characterized in that it comprises the step of transmitting a call confirmation response message to the wireless private exchange. The method of claim 1, wherein the call request terminal is one of a wireless terminal and a wired terminal. In the case where the actual to-be-called wireless terminal in the wireless private exchange does not match the location of the corresponding service area and the location information in the switching system, when the incoming request and the outgoing request of the called wireless terminal are simultaneously generated, the incoming service is processed first. In the method, when a call request terminal requests a call to the called radio terminal, the terminal searches for the location of the called terminal and instructs a call to a port of the base station, and stores the called radio terminal in a ring state in terminal state information. And sending a ring disconnect message to the corresponding base station port when the called radio terminal is requested to send and the terminal state information is determined that the called radio terminal is in a ring state, and the ring disconnect message is transmitted. And transmits a status information conversion message to the call request terminal port. And transmitting a call start message to the called wireless terminal port after transmitting the state information conversion message; and sending a call confirmation response message to the call request terminal port after transmitting the call start message. And a call path between the call request terminal and the called wireless terminal. The method of claim 4, wherein the call request terminal is one of a wireless terminal and a wired terminal.