KR19990061458A - How to Handle Three-Party Calls After Handoff in Personal Mobile Switching System - Google Patents

Abstract

According to the present invention, after an arbitrary subscriber handoffs an exchange period in an electronic switching system employing a mobile communication protocol such as IS-651, IS-634, or IS-41C, the subscriber who has performed the handoff has two wired or wireless subscribers. The present invention relates to a method for handling a call between three parties after a handoff at a personal communication exchange allowing simultaneous communication. In the related art, in the related art, a subscriber who performs the handoff after performing a handoff period at the personal communication exchange in the related art. Although the handoff subscriber's information is present in the anchor personal communication exchange even when the user wants to make a three-way call with the wireless or wired subscriber, the processing of the three-way call of the handoffed subscriber is refused. After completing the handoff during the call, the mobile subscriber and the mobile subscriber who By implementing a three-way call and how to those, among the inter-fixed subscriber and a mobile subscriber and the fixed subscribers, it can improve in the above-mentioned drawbacks.

Description

How to Handle Three-Party Calls After Handoff in Personal Mobile Switching System

The present invention relates to a method for handling a call between three parties after a handoff in a personal mobile communication switch, and in particular, any subscriber in an electronic switch system employing a mobile communication protocol such as IS-651, IS-634, and IS-41C. The present invention relates to a method for handling a call between three parties after a handoff at a personal communication exchange that allows the subscriber who has handed off the call to communicate with two subscribers, either wired or wireless, at the same time.

In the prior art, even after the handoff period is handed off at the personal communication exchange, even if the subscriber who has handed off the mobile terminal wants to make a three-way call with the wireless or wired subscriber, the information of the handoff subscriber is present at the anchor personal communication exchange. There was a flaw in the rejection of one-party call processing by a subscriber.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned drawbacks of the prior art, and a third party can make a third call with an existing party by making a call to a third party after a mobile subscriber subscribed to an additional service at the exchange is handed off. The purpose is to provide a way to make three-way calls.

In order to achieve the above object, the present invention provides a function of exchanging between personal communication subscribers, and the terminal information of a mobile subscriber in a plurality of personal communication exchange periods that provide exchange functions to mobile subscribers and fixed subscribers. In a mobile communication system in which a handoff has been successfully handed off to a serving exchange in a control area of an anchor personal communication exchange, which is a corresponding exchange, the wireless subscriber who has handed off the call requests the called subscriber. Receiving the call request message with the subscriber from the serving exchange, and the request input from the subscriber who has handed off the handoff processing unit at the anchor exchange exchange. A first judging step of judging whether it is a request; 1 If the request inputted from the subscriber who has determined and handoffed in the decision step is an additional service request, the mobile subscriber who has handoffed has the number information of the called party (described as a fixed subscriber) that is received by the mobile subscriber who has handed off, and adds the anchor exchange. Requesting an additional service from the service processing unit; a second determination step of retrieving information on the called subscriber; and determining whether a three-way call service is possible; and a mobile subscriber requesting service by handoff by determining in the second determination step. Is a serviceable subscriber, a third determination step of determining whether the called party is currently available for call, and if the called party is available for call reception, as determined by the third determination step, sending a dial tone to the serving exchange to inform that the called party is in a callable state. The additional service processor generates the ring tone. Generating a ring tone, the additional service processor transmitting the ring tone generated to the subscriber processor to which the third subscriber belongs, and the subscriber processor transmitting the ring tone to the third subscriber and opening the call in response. The step of opening the call path between the supplementary service processor of the anchor exchange to which the handed mobile subscriber belongs and the corresponding third subscriber, and the supplementary service processor that learns that the call path has been opened, has three characters to the mobile subscriber who has handed off the call. Connecting the call path to the mobile subscriber who has handed off the three-way channel at the same time as notifying that the call has been initiated; Provide a treatment method.

1 is a block diagram of a mobile communication system suitable for explaining a method of making a three-way call after handoff at a personal mobile communication switch in accordance with the present invention;

2 is a connection block diagram of a mobile communication switching period suitable for explaining a method of making a three-way call after a handoff at a personal mobile communication exchange according to the present invention;

3 is a flow chart illustrating the steps of making a three party call after handoff at a private mobile communication exchange in accordance with the present invention.

<Description of the code | symbol about the principal part of drawing>

102, 104: first and second base station 112, 114: first and second base station controller

122,124: first and second personal communication exchange 130: home location subscriber register

202, 222: first and second base station controller matching unit

204,224: first and second fixed subscriber processing units

206,226: first and second handoff processing unit

208,228: First and second additional service processing unit

210,230: first and second visited subscriber location registers

212,232: first and second exchange matching unit 214,234: first and second mobile call processing unit

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the invention described below with reference to the accompanying drawings.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention.

Referring to the configuration according to the present invention, a plurality of personal communication exchangers (122, ..., 124, ...) that provides the exchange function between the personal communication subscribers, and also provides the exchange function to mobile and fixed subscribers; Connection between the plurality of first base stations (102, ...) and the first personal communication switch (122) by wire, and the first mobile communication switch (122) connected by an internal switch or an NO. A plurality of first base station controllers 112, ..., a plurality of second base stations 104, ..., and a second personal communication exchange that perform functions such as matching, inter-cell handoff processing, call control, and the like. And a second base station controller 114 and a first base station controller 112 that perform the same operation as the above-described first base station controller, and transmit and receive wireless signals, system synchronization, and wireless channel. Coding and decoding, signal strength and quality measurements, baseband signal A plurality of first base stations 102, ..., and a second base station controller 114, which have a call processing, diversity, radio resource management and self-maintenance function and which are wirelessly matched with a plurality of personal communication terminals. And a plurality of second base stations 104, ... serving the same role as the plurality of first base stations 102, ..., subscriber parameters and location information for all registered terminals. It comprises a home location subscriber register 130, which is a database management system that manages, and the configuration in the personal communication exchange of one of the plurality of personal mobile communication exchanges, the configuration in the first personal communication exchange 122 A first base station controller register that matches a plurality of first base station controllers (112, ...) and a first visited subscriber location register (210), which is a database that stores all information about terminals existing in a managed area. The unit 202, a first mobile call processing unit 214 which manages the mobile subscribers to smoothly move while maintaining the call without disconnection when moving to another system, and a first fixed subscriber processing unit that is responsible for call processing of the fixed subscribers ( 204, a first handoff processing unit 206 for inquiring and storing information of the subscriber who has handed off the handoff at each personal communication exchange and controlling the call of the subscriber who has handed off the call; A first additional service processing unit 208, which enables the additional service to be supported, and a first exchange matching unit 212 for protocol matching between both exchanges when calling or handing off from one exchange to another. In addition, since the structure in the second personal communication exchange 124 is similar to that of the first personal communication exchange 122, description thereof will be omitted.

Referring to Fig. 1, a block diagram of a mobile communication system suitable for explaining a method of making a three-way call after handoff at a personal mobile communication exchange will be described in detail. , ...) provides an exchange function between personal communication subscribers and an exchange function not only for mobile subscribers but also for fixed subscribers, the home location subscriber register 130 and the visited subscriber location registers 210, ..., 230, It has a function of exchanging information between ...).

In addition, the electronic switch having an interface function with a plurality of base station controllers (112, ..., 114, ...) for transmitting and receiving signals and voice data with the terminal.

One first base station controller 112 is matched with a plurality of first base stations 102, ..., base station wireless signal transmission and reception, system synchronization, radio channel encoding and decoding, signal strength and quality measurement, baseband A device having signal processing, diversity, radio resource management and self-maintenance functions, and performing functions such as inter-cell handoff processing and call control, the switch being connected to a corresponding first personal communication exchange 122 to which a base station controller is connected. Connected to an internal interface or NO.7, one first base station controller 112 controls a plurality of base stations 102, ....

In addition, the first base station controller 112 controls each base station 102, ... to wirelessly receive a signal from each base station 102, ..., and controls the signal processing process to control the corresponding first base station The controller 112 connects with the corresponding personal communication exchange 122.

Since the second base station controller 114 is similar to the operation of the first base station controller 112 described above, a description thereof will be omitted.

A plurality of first base stations (102, ...) is connected to the first base station controller 112 to transmit and receive radio signals, system synchronization, radio channel encoding and decoding, signal strength and quality measurement, baseband signal processing, diversity It has a radio resource management and self-maintenance function, and wirelessly matches with multiple personal communication terminals.

Since the plurality of second base stations 104, ... is similar to the operation of the first base station 102, ..., the description thereof will be omitted.

The home location subscriber register 130 stores subscriber parameters and location information for all terminals registered in the plurality of personal communication exchanges 122, ..., 124, ... belonging to the home location subscriber register 130. Means a database management system.

Referring to Fig. 2, a detailed block diagram of a mobile communication switching period suitable for explaining a method of making a three-way call after a handoff in a personal mobile communication exchange will be described in detail. ) Is a block that matches a plurality of base station controllers 112, ..., 114, ... installed outside the exchange, and the base station controller matching units 202, 222 in the personal communication switch 122, 124 It converts the signals coming from the base station controllers 112, ..., 114, ... into signals usable by the personal communication exchanges 122, 124 and at the same time each base station controller 112, ... ., 114, ...) to transmit the signal output to the internal interface method or common line signal type recognized by the base station controller 112, ..., 114, ... to facilitate the conversion of signals between stations do.

Each fixed subscriber matching unit 204, 224 is responsible for call processing of fixed subscribers, and serves to connect calls between fixed subscribers and between fixed subscribers and mobile subscribers in respective personal communication exchanges 122 and 124. do.

If it is determined by each fixed subscriber matching unit 204, 224 that it is determined to be a call between the mobile subscriber and the fixed subscriber, the fixed subscriber is the incoming / outgoing process in each fixed subscriber processing unit (204, 224), each mobile call processing unit ( In 214 and 234, the mobile subscriber makes a call / incoming process so that the call is connected.

Therefore, a call between a fixed subscriber and a mobile subscriber is possible at each mobile switching center 122,124. Each mobile call processing unit (214, 234) is responsible for mobile call processing and other call progress related processing, and is connected to each visited subscriber management unit (210, 230) to receive or send the information of the mobile subscriber to the mobile subscriber, Connect a call between a mobile subscriber and a fixed subscriber.

Each handoff processing unit (206, 226) inquires and stores information of the handoffed subscriber in relation to the handoff in each of the personal communication exchangers (122, 124) so that the call of the handoffed subscriber is the target exchange or serving. If there is an exchange, the call connection and billing are connected, and the billing is calculated so that the mobile subscriber does not have a disadvantage due to handoff.

In addition, each mobile call processor 214, 234 allows mobile subscribers to move smoothly, while keeping the call uninterrupted when handing off to a system of another personal communication exchange.

Each visited subscriber location register (210, 230) is a database that is located inside the corresponding mobile communication exchange (122, 124) and receives the information of subscribers managed by the corresponding personal communication exchange (122, 124) and stores it for a while. . As an example, if a subscriber is temporarily transferred to a registered subscriber, the subscriber information is destroyed, and if a new subscriber comes in, the subscriber information is received from the home location subscriber register 130 and stored there. A database that receives and stores subscriber information.

Each additional service processing unit 208, 228 is a block that allows the additional service to be supported while the call is in progress, and controls the call of the mobile and fixed subscribers related to the additional service by inquiring the database of whether the additional service is registered or not. .

Each exchange matching unit 212, 232 is a block for protocol matching between two exchanges when a call is connected or handed off from one exchange to another exchange. In case of a signal going out to a large station, the signal is converted to a common line signal and transmitted to the large station so that the exchange is connected.

Referring to Figure 3 in detail with respect to the flow chart illustrating the steps of the three-way call after the handoff in the personal mobile communication exchange, first, the terminal of the mobile subscriber is the anchor that is the corresponding exchange that the subscriber information is set to register the location ( ancher) successfully handed a serving exchange (which has already been handed off), (hereinafter referred to as a second personal communication exchange) in the controlling area of the personal communication exchange (hereinafter referred to as the first personal communication exchange). It's off.

In the region belonging to the second personal telecommunication exchange, the handoff subscriber continues to talk with the calling subscriber (abbreviated to the subscriber who is talking with the handed off subscriber) as the calling subscriber, but the information about the mobile subscriber is the first personal telecommunication exchange which is the anchor exchange. Stored at 122.

The third party call is initiated by the mobile subscriber handing off after the handoff requesting a call from the called subscriber (described for the fixed subscriber), which is the third subscriber, during the call with the calling subscriber.

The handed off wireless subscriber makes a call to the called subscriber (step 302).

The second personal communication exchange 124, which is a serving exchange that receives a call request from the subscriber who has handed off the corresponding handoff, passes through the second base station controller matching unit 222 of the second personal communication exchange 124 to the second personal communication exchange 124. Is received by the second handoff processing unit 226 (step 304).

The second handoff processing unit 226 transmits the call information carrying the relay line information and the signal link information of the anchor exchange for transmitting to the anchor exchange having the information of the mobile subscriber, to the second exchange matching unit of the second personal communication exchange 124 ( 232) (step 306).

The second exchange matcher 232 sends a call request message to the first switch matcher 212 of the first personal communication switch 122 (step 308).

The first handoff processing unit 206 of the first personal communication exchange 122 receives a call request message with the subscriber from the first exchange matching unit (step 310).

The first handoff processing unit 206 determines whether the request inputted from the subscriber who has handed off is an additional service request (step 312).

If the request inputted from the subscriber who has determined to be handoff in step 312 is a supplementary service request, the first supplementary service processing unit has the number information of the called party (described as a fixed subscriber) that the mobile subscriber who has handed off the call has received; Request an additional service at 208 (step 314).

The first supplementary service processor 208 determines that the calling subscriber is a mobile subscriber in a handoff state, and searches for information on the called subscriber to determine whether the three-party call service is possible, including whether the subscriber is registered to the supplementary service. (Step 316).

If it is determined in step 314 that the mobile subscriber who has handoffed the service request is a serviceable subscriber, it is determined whether the called party is currently available to call (step 318).

If it is determined in step 316 that the called party is available, the called party sends a dial tone to the second personal communication switch 124 to which the mobile subscriber which is the calling party requested for the additional service belongs, indicating that the called party is in a callable state (step 320).

The first additional service processor 208 generates a ring tone to generate a ring tone (step 322).

Investigate whether the corresponding exchange to which the called party belongs is a local exchange or a foreign exchange, and if it is a foreign exchange, prepare a relay call and transmit the ring tone generated to another exchange to transmit the ring tone. Here, the description will be made by setting that the called subscriber exists in the serving exchange, that is, the second personal communication exchange 124.

The first supplementary service processor 208 transmits the ring tone generated to the second fixed subscriber processor 224 that processes the called subscriber through the first switch matcher 212 and the second switch matcher 232 ( Step 324).

When the second fixed subscriber processor 224 delivers the ring tone to the called party and the called party opens the call path accordingly, the first additional service processor of the first personal communication switch 122 that is the anchor exchange to which the mobile subscriber who has handed off belongs. A call path between 208 and the called subscriber, which is a fixed subscriber, is opened to enable call initiation (step 326).

The first supplementary service processor 208, which finds that the channel has been opened, notifies the mobile subscriber who has handed off the call subscriber a notification that a three-way call has been initiated, and at the same time, transmits an initial message to the mobile subscriber who has handed off the three-way channel. Conversely, the call is connected (step 328).

The first handoff processing unit 206, the first exchange matching unit 212, the second exchange matching unit 232, and the second handoff processing unit 226 transmit a signal indicating that the first additional service processing unit 208 is connected to the call. ), When transmitting through the base station controller matching unit to which the corresponding handoff subscriber belongs, the base station to which the corresponding handoff subscriber belongs, a three-way call is made between the handoff subscriber, the calling subscriber, and the called subscriber.

The principles of the invention have been described above in connection with specific devices, which are described by way of example only, and are not limited to the spirit of the invention as described in the appended claims.

As described above, the present invention provides a three-way calling method between mobile subscribers and mobile subscribers, mobile subscribers, fixed subscribers, and mobile subscribers and fixed subscribers who have handed off after the mobile subscriber completes the handoff. The implementation has the effect of providing a method capable of a three party call after the mobile subscriber has handed off.

Claims (1)

The mobile subscriber's terminal is located between a plurality of personal communication exchangers 122, ..., 124, ... that provide an exchange function between personal communication subscribers and also provide an exchange function to mobile subscribers and fixed subscribers. In the mobile communication system which has successfully handed off to the serving exchange 124 in the area controlled by the anchor personal communication exchange 122, which is the corresponding exchange set up to be registered, Requesting a called party to the called subscriber and receiving the handoff by the handoff processing unit 226 of the serving exchange 124; Receiving, by the handoff processing unit (206) of the anchor exchange (122), a call request message from the serving exchange (124) with the subscriber; A first determination step of determining, by the handoff processing unit (206) of the anchor exchange (122), whether a request input from a subscriber who has handed off is an additional service request; If the request input from the subscriber who has determined by the first decision step is a supplementary service request, the mobile subscriber having the handoff has number information of the called party (set to be set as a fixed subscriber) that has been received, and the anchor Requesting an additional service from the additional service processor 208 of the exchange 122; A second determination step of the additional service processor 208 determining whether a three-way call service is possible by retrieving information of the called subscriber; A third judging step of judging whether the called party is currently available to call if the mobile subscriber who has determined to be handoff and requested service in the second judging step is a serviceable subscriber; Determining, by the third determining step, that the called subscriber is available for a call when the called subscriber is available to be called; Generating, by the additional service processor 208, a ring tone; Transmitting, by the additional service processor 208, a ring tone generated by the subscriber processor 224 to which the third subscriber belongs; When the subscriber processing unit 224 delivers the ring tone to the third subscriber and the called subscriber opens the call path accordingly, the additional service processing unit 208 and the third of the anchor exchange 122 to which the mobile subscriber who has handed off belongs. Opening a channel between subscribers; The additional service processing unit 208, which finds that the call path has been opened, informs the mobile subscriber who has handed off the existing call to notify the mobile subscriber that the three-way call has been started. Method of handling three-way call after handoff at communication exchange.