KR100233914B1 - Method for disposing of call hold in a personal communication system - Google Patents

Abstract

The present invention provides a personal communication in a call hold processing after handoff between wireless, wireless-wired, and wired in an all-electronic switching system employing a mobile communication protocol such as IS-651, IS-634, IS-41C, etc. in a personal communication exchange. The present invention relates to a method for handling call hold between exchanges. In the related art, when a user wants to hand off and receive a call hold service later, a visitor subscriber location register of an anchor personal communication exchange, which is a corresponding exchange where subscriber information is registered. Although there is a drawback in that it does not provide the service even though the target personal communication exchange attempts to provide the call holding service, the present invention receives the call request by the third subscriber and makes an existing call after the mobile subscriber is handed off. So that subscribers can hold calls and talk to third parties to receive normal supplementary services. By maintaining a smooth mobile communication call, the aforementioned drawbacks can be improved.

Description

How to Handle Call Hold at Private Mobile Switching System

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a call hold processing method, and in particular, between wireless, wireless-wired and wired in an all-electronic switching system employing a mobile communication protocol such as IS-651, IS-634, IS-41C, etc. in a personal communication exchange. The present invention relates to a method for handling call hold between personal communication exchanges during call hold processing after handoff.

As is well known in the art, the subscriber's information was retrieved in order to connect a call when a call holding service is desired at a personal communication exchange. At this time, the personal communication switch determines whether the call is a call pending request subscriber by searching for subscriber information in an internal subscriber location register or an external home location register.

However, in the related art, when handoff and subsequent call hold service are desired, the target information is located at the visited subscriber location register of the anchor personal communication exchange, which is the corresponding exchange where the subscriber information is registered. There was a drawback of not being able to provide call hold service even if the communication exchange wants to be provided.

The present invention relates to a call hold processing method of suspending a call of an existing subscriber and connecting a call with a third subscriber when a mobile subscriber subscribed to an additional service receives a call request from a third subscriber after handoff from a personal communication exchange. The purpose is to provide.

In order to achieve the above object, the present invention provides a plurality of personal communication exchanges, and a plurality of first base station and a first personal communication exchange, which provides an exchange function between personal communication subscribers, and also provides an exchange function to mobile subscribers and fixed subscribers. A plurality of first base station controllers connected to the first mobile communication switch through a switch internal interface or a NO.7 link and performing functions such as matching with a base station, inter-cell handoff processing, and call control. And a second base station controller which performs a wired connection between the plurality of second base stations and the second personal communication switch, and performs the same operation as the above-described first base station controller, and is connected to the first base station controller to transmit / receive wireless signals and synchronize the system. , Radio channel coding and decoding, signal strength and quality measurement, baseband signal processing, diversity, radio resource management and self A plurality of first base stations having a complementary function, wirelessly matched with a plurality of personal communication terminals, a plurality of second base stations connected to a second base station controller, and having the same role as the plurality of first base stations described above; The call hold processing method in a personal mobile switching center including a home location subscriber register, which is a database management system that stores and manages subscriber parameters and location information for all terminals, is performed between handheld subscribers or wireless subscribers after handoff. Requesting a call between the fixed subscribers, and retrieving and confirming the visited subscriber location register that the incoming wireless subscriber retrieved and retrieved the information of the destination wireless subscriber is under the control of the target exchanger, not the anchor exchange that was originally registered. , Handed off wireless subscriber and corresponding wireless subscriber / fixed Connecting the call between the particles, searching for subscriber information handed off from the visited subscriber location register, which is an anchor exchange having handoff information, and receiving the additional service. Confirming that the service is available; making a call waiting state for the other subscriber of the subscriber who has handed off by requesting the additional service requested by the subscriber from the visited subscriber location register to the additional service processing unit in the same exchange. Generating a dial tone suitable for the service, and the supplementary service processor notifies the mobile subscriber who has handed off a call request by a third subscriber to confirm through the terminal of the mobile subscriber who has handoffed the subscriber. On the phone Selecting whether or not to continue to talk to the fixed subscriber or mobile subscriber, requiring the fixed / wireless subscriber and the corresponding personal telecommunication switch to temporarily suspend the fixed or wireless subscriber who was on the call, and adding the personal telecommunication switch. Causing the service processor to hold the fixed subscriber / wireless subscriber who was on the call with the initial mobile subscriber; and the additional service processor sends a call request message to the mobile call processor in the same exchange to make a call with the handed-off subscriber and the third subscriber. It provides a call hold processing method in a personal mobile communication switch, characterized in that consisting of the step of connecting.

1 is a block diagram of a mobile communication system suitable for explaining a call hold processing method according to the present invention;

2 is a block diagram of a mobile communication switch suitable for explaining a call hold processing method according to the present invention;

3A-3C are flowcharts suitable for explaining a method for call holding processing at a personal mobile switching center according to 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 units

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.

Referring to the configuration of the mobile communication system in the personal communication exchange of the present invention, a plurality of personal communication exchangers 122, which provide an exchange function between personal communication subscribers and an exchange function to mobile subscribers and fixed subscribers, are provided. 124, ..., and a plurality of first base stations 102, ... and the first personal communication exchange 122 by wire, and the first mobile communication exchange 122 and the switch internal interface or NO .7 a plurality of first base station controllers 112, ..., connected to a link and performing functions such as matching with base stations, inter-cell handoff processing, call control, and the like; And a second base station controller 114 that performs a wired connection between the second personal communication switch 124 and the first base station controller, and a first base station controller 112 that is connected to the first base station controller 112. Transmission and reception, system synchronization, radio channel encoding and decoding, A plurality of first base stations (102, ...), which have signal strength and quality measurement, baseband signal processing, diversity, radio resource management, and self-maintenance, and which are wirelessly matched with a plurality of personal communication terminals; 2 are connected to the base station controller 114, and the plurality of second base stations (104, ...), which serve the same role as the plurality of first base stations (102, ...), and subscribers to all registered terminals. A home location subscriber register (130), which is a database management system that stores and manages parameters and location information, is described in the configuration of one of the plurality of personal mobile communication exchanges. The arrangement in 122 is a first visited subscriber location register 210, which is a database that stores all information about terminals present in the areas it manages, and a plurality of first base station controllers 112,. And a first base station controller matching unit 202 matching with.), A first mobile call processing unit 214 managing to smoothly move while maintaining the call without disconnection when the mobile subscriber moves to another system, and the call of the fixed subscriber. The first fixed subscriber processing unit 204 in charge of processing and the first hand for inquiring and storing information of the subscriber handed off in relation to the handoff at each personal communication exchange and controlling the call of the subscriber handed off the corresponding handoff. Off processing unit 206, a first additional service processing unit 208 that enables support of additional services during a call in progress, and a first exchange that matches protocols between both exchanges when calling or handing off from one exchange to another. It is composed of a matching unit 212. 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.

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

A number of personal communication exchanges 122, ..., 124, ... provide the exchange function between the personal communication subscribers and the exchange function to the fixed subscriber as well as the mobile subscriber, the home location subscriber register 130 and It has a function of exchanging information between visited subscriber location registers 210, ..., 230, ....

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 block diagram of a mobile communication switch suitable for explaining a call hold processing method will be described. Each of the base station controller matching units 202 and 222 includes a plurality of base station controllers 112, As a block that matches ..., 114, ..., the base station controller matching units 202, 222 in the personal communication exchanges 122, 124 are a plurality of base station controllers 112, ..., 114, ... .) And converts the signal from the personal communication exchange (122, 124) to a signal that can be used and at the same time the signal output from the corresponding personal communication exchange to each base station controller (112, ..., 114, ...) The base station controllers 112, ..., 114, ... transmit using a recognizable internal interface method or common line signal method to facilitate the conversion of signals between stations.

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 Figs. 3A to 3C, the steps of call hold processing in a personal mobile communication switch according to the present invention will be described. After successfully completing a handoff to the second personal communication exchange 124 as the target exchange in the area controlled by the personal communication exchange 122, the call continues in the area belonging to the second personal communication exchange 124 as the target exchange. However, the information on the mobile subscriber is stored in the first personal communication switch 122 which is an anchor switch.

After a handoff, a call is requested between the wireless subscribers or between the wireless subscribers and the fixed subscribers (step 302).

Assuming that the handed-off called party who received the call request is in an area controlled by the second personal communication exchange 124, the second fixed subscriber unit or the second visited subscriber location register of the second personal communication exchange 124 ( 230, look up the registration information of the target subscriber (step 304).

The second visited subscriber location register The second visited subscriber that the incoming wireless subscriber who retrieved and retrieved the information of the corresponding incoming wireless subscriber is under the control of the target exchange, that is, the second personal communication exchange 124, not the anchor location of the first location registration. The location register 230 is retrieved and verified (step 306).

Assuming that the subscriber having wireless handoff is located in the second personal communication exchange 124, a message is sent from the first personal communication exchange 122 to the second exchange matching unit 232 of the second personal communication exchange 124. The message is switched to the common line signaling scheme and transmitted to the second exchange matcher 232 of the second personal communication exchange 124 (step 308).

The second exchange matching unit 232 codes the received message signal of the common line signal method using the common line signal method for transmitting signal data to the outside.

The second switch matching unit 232 transmits the signal encoded by the common line signaling method through the received call request message trunk to the first switch matching unit 212 of the first personal communication switch 122 via another switch or directly. Transmit (step 310).

The first exchange matching unit 212 decodes the signal encoded by the common line signal method into a digital signal recognizable by the exchange.

If the anchor exchange is the first personal communication exchange 122, the information of the incoming wireless subscriber is stored in the first visited subscriber location register 210, so that the first switch matching unit 212 and the first mobile call processing unit 214 for information retrieval. The call request message is transmitted to the first visited subscriber location register 210 via the call) to connect the call between the handed off wireless subscriber and the corresponding wireless subscriber / fixed subscriber (step 312).

The subscriber information handed off at the first visited subscriber location register 210 is retrieved (step 314).

As a result of searching the first visited subscriber location register 210 in step 314, it is confirmed that the mobile subscriber who has handed off is already busy (step 316).

In step 314, the first visited subscriber location register 210 is searched to confirm that additional services in mobile communication such as call waiting, call hold, etc. are available (step 318).

In step 314, the first visited subscriber location register 210 is searched, and the called party registers the location at the first personal communication exchange 122, which is the anchor exchange, and is handed off to the second personal communication exchange 124, which is the target exchange. Confirm that the status (step 320).

The first visited subscriber location register 210 requests the additional service requested by the subscriber to the first mobile call processor 214 (step 322).

The first mobile call processing unit 214 requests additional service processing to the first additional service processing unit 208 with this information of the subscriber (step 324).

The first supplementary service processor 208 puts the corresponding calling fixed subscriber or wireless subscriber who is busy with the called subscriber handed off through the second personal communication switch 124 (step 326).

Referring to FIG. 3B, the first additional service processor generates a dial tone suitable for the service (step 328).

The first supplementary service processor 208 transmits the dial tone generated by the first switch matching unit 212 via the first mobile call processor 214 (step 330).

The first switch matching section 212 codes and transmits the dial tone in a common line signaling manner to the second switch matching section 232 of the second personal communication switch 124 assuming that the calling subscriber belongs (step 332).

Receiving the coded dial tone, the second exchange matching unit 232 decodes the received signal and transmits the dial tone instead of the busy signal to the corresponding fixed subscriber or the wireless subscriber who is on the call with the called wireless subscriber (step 334). .

The path through which the dial tone is heard and heard is transmitted through the second exchange matching unit 232 and the second fixed subscriber processing unit 224 in the case of the fixed subscriber, and in the case of the mobile subscriber, the second exchange matching unit ( 232), the second mobile call processor, the second base station controller matching unit 222, the second base station controller, and the base station hear a dial tone (step 336).

The first personal communication exchange 122, which is the anchor exchange of the handed-off subscriber, sends a dial tone to the fixed subscriber or mobile subscriber who has originated and received the dial tone, and that a call request by the third subscriber has been received by the corresponding mobile subscriber who has handed off. To the first mobile call processing unit 214 (step 338).

In the above-described step, it is assumed that the third subscriber makes a call request through the first personal communication switch 122.

The first mobile call processing unit 214 informs the first handoff processing unit 206 that a call request by the third subscriber is input (step 340).

The first handoff processing unit 206 sends a call request message to the first exchange matching unit 212 (step 342).

The first exchange matching unit 212 transmits a call request message to the second exchange matching unit 232 of the second personal communication exchange 124 to which the wireless subscriber belongs (step 344).

The second exchange matcher 232 sends a call request message to the second handoff processor 226 (step 346).

The second handoff processing unit 226 sends to the second base station controller matching unit 222 that a call request by the third subscriber has been input (step 348).

The second base station controller 114 communicates that the call request by the third subscriber of the additional service related command has been entered (step 350).

The second base station 104 transmits to the corresponding wireless subscriber that the call request by the third subscriber has been entered as an additional service related command (step 352).

Upon receiving this, the handoff mobile subscriber confirms through the terminal that the call request is input from the third subscriber through a beep or announcement message (step 354).

The handed-off subscriber chooses to continue the call with the fixed or mobile subscriber who was on the call, or withholds the call with the fixed or mobile subscriber who was previously on the call and with the third subscriber whose call request was entered. (Step 356).

If the call is rejected by the third party, the third party hears a busy signal to inform the caller that the caller is busy and continues to connect the call with the previously called subscriber.

Upon determining the call with the third party requesting the call, the fixed / wireless subscriber and the second personal communication exchange 124 are requested to temporarily hold the fixed subscriber or the wireless subscriber who was on the call (step 358).

Referring to FIG. 3C, the call hold request message is transmitted to the second base station controller 114 through the second base station 104 (step 360).

The second base station controller 114 sends a call hold request message to the second base station controller matching unit 222 of the second personal communication exchange 124 that is the target exchange (step 362).

The second base station controller matching section 222 sends a call hold request message to the second handoff processing section 226 (step 364).

The second handoff processing unit 226 sends a call hold request message to the second exchange matching unit 232 to send a call hold request message to the first additional service processing unit 208 of the first personal communication exchange 122 that is the anchor exchange. Is transmitted (step 366).

The call hold request message is forwarded from the second exchange matcher 232 to the first exchange matcher 212 of the anchor exchange directly or via another switch (step 368).

The first exchange matcher 212 sends a call hold request message to the first mobile call processor 214 (step 370).

The first mobile call processing unit 214 of the first personal communication exchange 122, which is the anchor exchange, receives the call hold request message and transfers the received call hold request message to the first supplementary service unit (step 372).

The first supplementary service processor 208 calls the fixed / wireless subscriber in the area controlled by the corresponding second personal communication switch 124 through the first switch matching unit to the fixed subscriber / wireless subscriber who was in the call with the initial mobile subscriber. Place the call on hold (step 374).

The first supplementary service processor 208 sends a call request message to the first mobile call processor 214 for a call with the third subscriber who has requested a call with the handed off wireless subscriber (step 376).

The first mobile call processing unit 214 uses a handed-off subscriber in the control area of the second personal communication exchange, which is the target exchange, through a relay line connected between the first exchange matching unit 212 and the second exchange matching unit 232. The call with the subscriber is connected and terminated (step 378).

The above-mentioned step of call hold processing in the personal mobile communication switch is set as the called subscriber by the handed-off subscriber, and the step of holding the call of the calling subscriber is explained. The method allows the call of the wireless called party to be put on hold and the call with the third party is possible.

As described above, according to the present invention, after the mobile subscriber is handed off, the subscriber receives a call request by the third subscriber and makes a call pending with the third subscriber, and enables the user to receive normal supplementary services. There is an effect of maintaining a smooth mobile communication call.

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.

Claims (1)

A plurality of personal communication exchangers 122,..., 124,..., And a plurality of first base stations 102. ...) and the first personal communication switch 122 by wire, and the first mobile communication switch 122 is connected to the switch internal interface or NO.7 link, matching with the base station, inter-cell handoff processing, Connecting a plurality of first base station controllers 112, ... that perform functions such as call control, and a plurality of second base stations 104, ..., and a second personal communication exchange 124 by wire. And a second base station controller 114 which performs the same operation as the first base station controller described above, and is connected to the first base station controller 112 to transmit / receive radio signals, system synchronization, radio channel encoding and decoding, signal strength and quality. Measurement, Baseband Signal Processing, Diversity, Radio Resources A plurality of first base stations 102,..., And a plurality of first base stations 102, ... that are wirelessly matched to a plurality of personal communication terminals, and a second base station controller 114, A home location subscriber, which is a database management system that stores and manages a plurality of second base stations 104, ... that serve the same role as (102, ...), and subscriber parameters and location information for all registered terminals. The method for handling call hold in a personal mobile switching center comprising a register (130) includes: Requesting a call between the wireless subscribers or between the wireless subscribers and the fixed subscribers after the handoff; Searching for and confirming the visited subscriber location register that the called wireless subscriber, which has searched for and retrieved the information of the called wireless subscriber, is under the control of the target exchanger rather than the anchor exchange that was originally registered; Connecting a call between the handed off wireless subscriber and the corresponding wireless subscriber / fixed subscriber; Retrieving subscriber information handed off from the visited subscriber location register, which is an anchor exchange having handoff information, and confirming that the corresponding supplementary service subscriber in the mobile communication is a handed off subscriber and is in a state capable of receiving supplementary service; Requesting an additional service requested by the corresponding subscriber from the visited subscriber location registers 210 and 230 managing the information of the subscriber to make a call waiting state of the subscriber of the subscriber who has handed off by requesting the additional service requested by the corresponding subscriber; Generating a dial tone suitable for a corresponding service in an additional service processing unit (208, 228) for processing an additional service requested by a predetermined subscriber; The supplementary service processing unit (208, 228) notifying the mobile subscriber who has handed off a call request by a third subscriber to confirm through the terminal of the mobile subscriber who has handed off; Selecting whether the handed-off subscriber will continue to talk with the corresponding fixed or mobile subscriber in the call; Requesting the fixed / wireless subscriber and the corresponding personal communication exchange to temporarily hold the fixed subscriber or the wireless subscriber who was on the call; The supplementary service processor (208, 228) of the personal telecommunications exchange to hold the fixed subscriber / wireless subscriber who was on the call with the initial mobile subscriber; The supplementary service processor 208, 228 sends a call request message to the mobile call processor 214, 234, which manages the movement of the mobile call subscriber in the same exchange, and connects the call with the handed-off subscriber and the third subscriber. Call handling method in a private mobile switching center.

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