KR20040008839A - Method of call processing for termination call from public land mobile network to a busy terminal on a private wireless network - Google Patents

Abstract

PURPOSE: A method of processing a public network receiving call for a busy terminal through a pMSC(private Mobile Switching Center) is provided to enable a mobile communication network to manage a state of a busy subscriber, and to immediately process a receiving call as a busy call, thereby enabling a calling subscriber to recognize that a receiving subscriber is busy. CONSTITUTION: When a receiving call is received(410), an MSC requests subscriber information on a receiving subscriber of a VLR(420). The VLR transmits the subscriber information to the MSC(430). The MSC decides whether the receiving subscriber is busy(440). If so, the MSC decides whether the receiving subscriber is registered in a call forwarding service(460). If so, the MSC transmits a call forwarding number request message to an HLR(480). The HLR transmits a call forwarding number to the MSC through a call forwarding number response message(490).

Description

METHODOLOGY OF CALL PROCESSING FOR TERMINATION CALL FROM PUBLIC LAND MOBILE NETWORK TO A BUSY TERMINAL ON A PRIVATE WIRELESS NETWORK}

The present invention relates to a communication network including a mobile communication public network (or a mobile communication network) and a private switching network, and more particularly, to an incoming call processing for a private switching network subscriber flowing into a mobile communication public network.

The private switching network to which the present invention is applied is particularly applicable in a private switching network capable of wireless wireless service in the premises. You can receive calls on your cell phone from outside the office. One example of a private switching network configured as described above is a commercial service currently called Infomoblie. The terminal registered in the private switching network is a terminal capable of simultaneously performing a mobile terminal function and a wired terminal function.

In general, a schematic configuration of a communication network including a private switching network and a mobile communication network is configured as shown in FIG. 1.

The private switching network 100 is configured to interwork with the public telephone network 180 through the trunk line trunk and to the mobile communication network 130 through the wireless trunk. When the mobile communication network 130 performs the incoming call processing for the mobile terminal 160 of the private switching network 100, a call service is provided separately from the public telephone network 180. That is, in the private wireless network 120, a call service is performed by performing an incoming call processing through a private mobile switching center (pMSC) 121 and a private base station controller (pBSC) 122. do.

In the following description, the term “private switching network 100” includes a private wireless network providing a service to a mobile terminal 160 registered in a private switching network and a private wired network providing a service to an extension terminal 150 connected to the private exchange. I use it to mean.

In the communication network configured as described above, when the mobile terminal 140 calls the extension terminal 150 of the private switching network in the mobile communication network 130, it interworks with the public telephone network 180 through the trunk line trunk, and then re-creates the trunk line trunk. Through the private wired network 110 to perform the incoming call processing for the extension terminal 150.

When the mobile terminal 140 calls the mobile terminal 160 registered in the private switching network in the mobile communication network 130, the following process is performed. First, the mobile terminal 140 of the mobile communication network 130 makes an incoming call request to call the mobile terminal 160 of the private wireless network 120. The mobile switching center (MSC) 131 of the mobile communication network transmits a paging request message to a base station controller (BSC) 132. When the base station controller receives the call request message, the base station controller transmits a call message to the private wireless network 120. The private wireless network 120 receiving the call message calls the mobile terminal 160. Thereafter, when the mobile terminal 160 answers the call, a call path is established between the mobile terminal 160 registered in the private switching network and the mobile terminal 140 of the mobile communication network through the corresponding private wireless network 120. It will be connected to provide call service.

However, when the mobile terminal 160 registered in the introduction switching network 100 is in communication using only the private switching network 100 without passing through the mobile communication network 130, there are the following problems. When the mobile terminal makes a call of the wired terminal function, that is, the mobile terminal 160 makes a call with the wired subscriber 181 of the public telephone network 180 through the private switching network 100 or another mobile in the private switching network. When the terminal is in communication with the private network 100, the call state of the subscriber is managed by the private switching unit 121. At this time, the mobile communication public network does not know the call state of the subscriber. Therefore, the incoming call to the called subscriber could not be processed in the mobile communication network 130 by Busy and the call waiting state (Idle) was performed. That is, when the mobile terminal 140 in the mobile communication network calls the mobile terminal 160 in a call in the private switching network 100, the mobile terminal 140 transmits a ringing tone (RingBackTone) to the mobile terminal 140 in the mobile communication network and simultaneously receives an incoming call. A paging request message for setting is transmitted to the base station controller. However, the mobile terminal 160 in the private switching network is already in a call state and cannot respond to the call request. Therefore, the base station switching unit performs the paging non-response processing procedure of the called terminal 160 after a predetermined time according to the idle call processing of the subscriber, so that even when the called terminal is registered with the incoming call switching service, There was a problem that the incoming call transfer service is not provided and the paging is not answered.

An object of the present invention for solving the above problems is to enable the mobile communication network to manage the call state in the private switching network for the private wireless telephone service subscriber (or terminal) through the switching unit of the mobile communication public network for the subscriber It is to provide a method for the exchange to handle the attempted call during a call.

Another object of the present invention is to provide a method for providing an incoming call transfer service based on a busy condition when a subscriber in a private switching network registers an incoming call transfer service.

Still another object of the present invention is to save MSC / BSC / BTS resources required for incoming call setup by busying a call attempted through an MSC to a subscriber who is calling through a private wireless network.

In order to achieve the above object, the present invention provides a process in which a private switching network subscriber transmits a called number including a private switching network identifier, and the private switching network exchange receiving the outgoing message transmits to the mobile communication network that the subscriber is busy. Storing, at the visitor location register, the subscriber in a busy state in a private switching network and a call start time (BusyTimeStamp) at the visitor location register; and managing the subscriber in a busy state in a private switching network at the visitor location register. Processing, by the mobile communication network, the incoming call for the private communication network when the call of the private switching network terminates; And the mobile communication exchange unit is in the room. Here takes place the location register to the process of the subscriber is stored that the call standby state.

1 is a schematic configuration diagram of a communication network including a private switching network and a mobile communication network,

2 is a diagram illustrating a procedure for recording a state of a subscriber in a private exchange network in an MSC according to the principles of the present invention;

3 is a flowchart for managing a busy state in a subscriber's private switching network in a mobile communication public network according to an embodiment of the present invention;

4 is a flowchart of a processing method in a mobile communication public network for a subscriber in a private switched network call according to another embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same reference numerals and the same elements in the drawings are represented by the same reference numerals and symbols as much as possible even if shown on different drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

The present invention discloses a method of managing an incoming call to a private switching network subscriber (or terminal) in a mobile communication network in a private switching network.

As described above, the present invention provides a process for notifying the mobile communication network switch that the mobile station is in a busy state when the mobile terminal is in a busy state of a wired terminal function in the private switching network. Storing a call start time and a call start time of the subscriber in an additional visitor location register; and when the call is terminated by the mobile terminal, the private exchange network switch notifies the mobile communication exchange that the call of the mobile terminal has ended. And storing, by the mobile communication exchange unit, that the terminal is in a call waiting state in the visitor location register.

2 is a diagram illustrating a procedure in which a mobile communication switching unit (MSC) records a state of a subscriber in a private switching network according to the principles of the present invention.

The present invention will be described with reference to FIGS. 1 and 2 above.

In step 210 of FIG. 2, the private exchange network 100 service subscriber 160 dials an outgoing prefix (prefix) and a forwarding number to set up an outgoing call to another private switched network 100 subscriber or a public telephone network 180 subscriber. To make a call. The heading serves as an identifier used to distinguish whether the call is transmitted through a mobile communication public network or a private wireless network (for example, a #button of a terminal). That is, when dialing including the origination header, the origination is made through the private wireless network 120. The private wireless network 120 receiving the outgoing message transmits the subscriber 160 to the switching unit 131 of the mobile communication public network through the base station controller 132 in step 220 and sends the private wireless network outgoing call. Set.

When the private wireless network service subscriber 160 sets an incoming call by the private wireless network 120, the private wireless network 120 transmits to the mobile communication public network 130 that the subscriber is in a busy state and then processes the incoming call. Proceed. The MSC / VLR 131 that is informed from the private wireless network 120 that the subscriber 160 is in the premises is busy in step 230 by the subscriber 160 in the subscriber database in the visitor location register (VLR). The private wireless network records the status of the call and the call start time (BusyTimeStamp).

Steps 240 and 250 indicate a process of recording the MSC when the call of the subscriber in the private wireless network ends. When the call of the subscriber 160 in the call is terminated in the private wireless network 120 in step 240, the private wireless network 120 notifies the mobile communication public network 130 that the call of the subscriber has ended. In step 250, the MSC / VLR 131 notified of the message that the subscriber's call is terminated from the private switching network records the call state of the subscriber as a call idle state in the subscriber database in the VLR.

As shown in FIG. 2, when an incoming call flowed into the MSC 131 is generated for a subscriber managed in a busy state in a private exchange network between steps 230 and 240, the MSC 131 processes the call during the call. .

The busy processing generally provides an incoming call forwarding service or a voicemail service when the called subscriber has activated a call forwarding service (CFW) or a voice mail service (VMS). If not, it sends a busy tone to the calling subscriber.

The busy processing is a pending service for the short message service (SMS) incoming message introduced to the MSC for the subscriber in the private exchange network. In this case, the pending processing means that the VLR manages the subscriber's short message service pending information (SMS_Pending) information and the subscriber is able to receive an SMS message (regarding the present invention, a call termination notification message is received in the private switching network). In this case, it means to notify the short message center (not shown) so that the delayed message can be downloaded again.

3 is a flowchart for managing a busy state in a subscriber's private switching network in a mobile communication public network according to an embodiment of the present invention.

The call state management mismatch of the subscriber may occur due to a system error in the private wireless network 120 and the mobile communication public network 130. A constant reference value is set in the MSC 131 to adjust for this call state mismatch.

3 illustrates a method of busy processing an incoming call according to a result of comparing the reference value with the BusyTimeStamp value.

Referring to FIG. 3, in step 310, the MSC operator presets a reference value (BusyAuditTime) for adjusting the call state mismatch between the private wireless network and the mobile communication public network. The reference value is optionally selected by the MSC operator during operation or is pre-programmed in the MSC.

The embodiment will be described with reference to FIGS. 1 and 3. When the incoming call to the subscriber 160 registered in the private wireless network flows to the MSC 131 in step 320, the MSC requests the subscriber information of the called subscriber 160 to the VLR in step 330. In step 340, the VLR receiving the request sends the subscriber information including the call start time to the MSC. The MSC determines whether the subscriber 160 is busy in the private wireless network 120 based on the information sent by the VLR in step 350. If it is determined that the call is in a waiting state, the MSC performs a general call setup procedure in step 360. When the subscriber 160 is in a busy state in the private wireless network 120, the MSC determines whether the difference between the current time and the call start time is greater than the reference value in step 370. As a result of the determination, the MSC handles the incoming call during the call when it is smaller or equal. If the difference between the current time and the call start time is larger than the reference value, the call waiting procedure of the called subscriber in the call waiting state is performed to manage the call state of the private wireless network. The MSC sends a paging request message to the BSC in step 380, and changes the call start time to the current time. The MSC determines whether there is a paging response to the call request in step 390. If the subscriber 160 is still busy in the private wireless network 120, there will be no paging response, and the MSC will continue to manage the subscriber 160 in a busy state, thereby handling the incoming call during the call. If the subscriber 160 becomes a paging response, the incoming call is connected to the called subscriber 160. When the call of the subscriber 160 ends, the MSC manages the call state of the subscriber as the call waiting state in step 400.

4 is a flowchart illustrating a processing method in a mobile communication public network for a subscriber in a private switched network call according to another embodiment of the present invention.

Hereinafter, a description will be given with reference to FIGS. 1 and 4.

When the incoming call to the subscriber 160 registered in the private wireless network flows into the MSC in step 410, the MSC requests subscriber information of the called subscriber 160 to the VLR in step 420. In step 430, the VLR receiving the request sends the subscriber information including the call start time to the MSC. The MSC determines whether the subscriber 160 is busy in the private wireless network based on the information sent from the VLR in step 440. As a result of the determination, if the subscriber 160 is in the call waiting state, a normal incoming call setup procedure is performed in step 450.

When the called subscriber 160 is busy in the private wireless network 120, the MSC determines whether the called subscriber is registered in the call forwarding service in step 460. If the called subscriber is not subscribed to the call forwarding service, the MSC processes the incoming request during the call in step 470. If the called subscriber is subscribed to the call forwarding service, the MSC transmits a call forwarding number request message to the home location register (HLR) in step 480. In response to the incoming call number request message, the HLR sends a call forwarding number to the MSC through a call forwarding number response message in step 490. The MSC performs an incoming call forwarding service (CWW) or a voice mail service (VMS) according to the forwarding number sent by the HLR in step 500.

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. For example, in the call forwarding process illustrated in FIG. 4, an embodiment performed before transmitting a busy tone to the calling terminal in FIG. 3 is also a modification of the scope of the present invention. In addition, an embodiment of performing the process shown in FIG. 3 before performing step 460 in FIG. 4 is also a modification of the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention enables the mobile subscriber network to manage the status of the subscriber on the private exchange network so that when there is an incoming call through the MSC, the subscriber immediately recognizes that the called subscriber is busy. If the called party is registered with the incoming call forwarding service, the incoming call forwarding service can be provided according to the Busy condition, and it is not necessary to deliver the paging request message to the terminal that will not respond to paging. There is an advantage to save BSC / BTS resources.

Claims (13)

In a communication network including a mobile communication network and a private switching network, an incoming call to a mobile communication number through the mobile communication network during a call of a wired terminal function to a terminal capable of simultaneously performing a mobile terminal function and a wired terminal function registered in the private switching network. A method of processing a call during a call in the mobile communication network, When the mobile terminal is in a busy state of a wired terminal function in the private switching network, the private switching network notifying the mobile communication network switch that the terminal is in a busy state; Storing, by the mobile communication network switching unit, the subscriber's busy state and a call start time in a visitor location register; Notifying, by the mobile terminal, that the call of the mobile terminal has ended when the mobile terminal terminates a call; And storing, by the mobile communication exchange unit, that the terminal is in a call waiting state in the visitor location register. The method of claim 1, wherein the mobile communication network exchange part performs an incoming call to a subscriber managed in a busy state in the private switching network to the visitor location register. The method as claimed in claim 2, wherein the incoming call is a voice call or a short message service call. The method as claimed in claim 2, further comprising: pending processing of the short message incoming call when the incoming call is a short message service incoming call. In a communication network including a mobile communication network and a private switching network, an incoming call to a mobile communication number through the mobile communication network during a call of a wired terminal function to a terminal capable of simultaneously performing a mobile terminal function and a wired terminal function registered in the private switching network. A method of processing a call during a call in the mobile communication network, When the incoming call of the wired terminal function through the mobile communication public network to the mobile terminal occurs, determining whether the mobile terminal is in a busy state by the mobile communication exchange unit; If the mobile terminal is busy, determining whether the mobile terminal is registered with a call forwarding service; And if the mobile terminal is registered with a call forwarding service, performing a call forwarding service. The method as claimed in claim 5, wherein the incoming call is a voice call or a short message service call. 6. The method as claimed in claim 5, wherein if the mobile terminal is not registered in the call forwarding service, a call tone is transmitted to the calling terminal. The method as claimed in claim 7, further comprising: pending processing of the short message incoming call when the incoming call is a short message service incoming call. In a communication network including a mobile communication network and a private switching network, an incoming call to a mobile communication number through the mobile communication network during a call of a wired terminal function to a terminal capable of simultaneously performing a mobile terminal function and a wired terminal function registered in the private switching network. A method of processing a call during a call in the mobile communication network, Determining, by the mobile communication exchange unit, whether the mobile terminal is in a busy state when an incoming call through the mobile communication public network occurs for the mobile terminal; If the subscriber is in a busy state, determining whether a difference between a current time and the call start time is greater than a predetermined reference value; If the difference between the current time and the call start time is greater than the reference value, updating the call start time to the current time and calling the subscriber; And if there is no paging response in the call, sending a call tone to the calling terminal. The method of claim 9, wherein the incoming call is a voice call or a short message service call. The method as claimed in claim 10, further comprising: pending processing of the short message incoming call when the incoming call is a short message service incoming call. The method of claim 5, further comprising: if the subscriber is not registered in the call forwarding service, determining whether a difference between a current time and the call start time is greater than a predetermined reference value; If the difference between the current time and the call start time is greater than the reference value, updating and storing the call start time at the current time and calling the subscriber; If there is no response to the call, transmitting the call tone to the calling terminal. The method of claim 9, further comprising: determining whether the subscriber is registered with a call forwarding service if there is no paging response in the call; If the subscriber is not registered in the call forwarding service, transmitting a ring tone to the calling terminal; And if the subscriber is registered in the call forwarding service, performing the call forwarding service.