KR19980063100A - Call Forwarding in Personal Communication Switching System - Google Patents

Abstract

The present invention relates to a call forwarding processing method in a personal communication switching system, wherein each of a plurality of mobile subscriber stations are connected through a plurality of base station controllers to support a plurality of ASS-Ws, INSs, and ASS-Ts. In the personal communication exchange system provided with the connected personal communication switch, starting the incoming call switching function when an incoming call to the subscriber terminal is generated while the incoming call switching function from a specific subscriber terminal is registered; Determining the incoming call switching mode by performing authentication of a subscriber targeted for the incoming call switching function, executing a mobile paging process based on the determined incoming call switching mode; Performing call setup by performing authentication procedure for the called party; and related to incoming call switching to the called party. Step of performing an announcement, it is configured toward the called subscriber to the step of switching the incoming call of the subscriber station.

Description

Call Forwarding in Personal Communication Switching System

The present invention relates to a call forwarding processing method in a personal communication exchange system. More specifically, call forwarding NO-answer delayed (CFNA) when a call is forwarded by a request of a personal communication subscriber (CFB). The present invention relates to a call forwarding processing method in a personal communication switching system for converting an incoming call to a subscriber or a designated voice mailbox of a desired number during a call uncoordination (CFU).

For exchange systems where only the functions for call processing of wired subscriber terminal periods connected through subscriber lines of well-known schemes are assumed, mobility is recently given to subscriber terminals, and call establishment and The personal mobile communication service function is enabled.

According to the personal communication exchange for realizing the service function of such personal mobile communication, the individual is a wired / wireless integrated system in which the wireless subscriber processing function is added in addition to the existing service processing function for the wired subscriber. In addition to providing a variety of services guaranteed in the communication network to provide a variety of communication services provided in the existing network (網) to provide the interworking function with other networks (ISDN, PLDN, etc.) heterogeneous with the personal communication network.

1 is a schematic block diagram of a general personal communication exchange system. In the figure, reference numerals 10a to 10n denote subscriber terminals referred to as so-called 'mobile phones' for carrying out communication based on mobility while personal subscribers are portable, and reference numerals 20a to 20n denote multiple subscriber terminals and calls, respectively. A base station which transmits / receives processed data to perform transmission / reception of radio signals to each subscriber station, conversion of communication protocols, encryption / decryption, and the like.

In addition, 30a to 30n indicate a base station controller that manages a plurality of base stations and performs functions related to allocation control of a communication channel to the subscriber station 10-10n, determination of handover, and the like.

In addition, 40 denotes a personal communication switch interfaced with the base station controllers 30a-30n; 30 in accordance with IS-651 / IS-634 standard, and 50 denotes a subscriber information management device (Home) described below for each subscriber station 10. It indicates an authentication center that is matched with a location register (HLR) and performs a license processing for an arbitrary subscriber station 10 or the like.

In addition, reference numeral 60 denotes a personal communication switch of another station for mutual communication of communication information by being interconnected with the personal communication switch 40 through a trunk medium.

2 is a view for explaining a schematic configuration of the personal communication switch 40 shown in FIG. 1, in which 72a to 72n correspond to the base station controllers 30a to 30n to perform wireless mobile communication. An access switching subsystem for wireless subscriber (ASS-W) for executing the call processing function of the subscriber station 10 for. Here, the ASS-W (72a-72n) has a systemic horizontal structure so that it can be expanded in units of ASS-W if necessary, while performing the call processing function or self-operation maintenance function for most mobile communication. Will have In addition, 74 denotes a conventional wired analog subscriber terminal, and 76 denotes an access switching subsystem for subscriber (ASS-S) for executing the call processing function of the wired analog subscriber terminal 74. As shown, the ASS-S 76 also performs most of the call processing function for the wired subscriber terminal 74 or its own operation maintenance function, and if necessary, the system can be expanded in units of the ASS-S. It will have a horizontal structure.

In FIG. 2, reference numeral 78 denotes the overall call processing of the corresponding personal communication switch 40 through the data link (ie, the optical link) for the ASS-W 72 (72a-72n) and the ASS-S 76. / Interconnection network subsystem (INS) responsible for administrative control, the INS (78) is the ASS-W / ASS-S (72, 76) for the configuration of the switching network (TST) In addition to the space switch (Space switch) associated with the time switch (T) located in the store, the storage and management of information about the subscriber station 10 existing in the service area of the corresponding personal communication switch 40 The VLR (Visitor Location Register) is located for the mobility management function. Here, the VLR temporarily stores the entire information about subscriber terminals 10, --- existing in the area managed by the corresponding personal communication switch 40, and the information is called by the personal communication subscriber. In the case of setting a, it is transmitted to the personal communication switch 40 in response to a request of the personal communication switch 40, and the information in the VLR is continuously modified as the subscriber terminal 10 moves.

In FIG. 2, reference numeral 80 denotes an access switching subsystem for trunk (ASS-T) for relay line matching between the personal communication switch 60 of the other station. 80) includes a public switched data network (PSDN) and a comprehensive information and communication network for the unification of exchange / transmission / subscriber terminals on the premise of digital technology to provide telephony / telephone and various non-system-based services. Integrated service digital network (ISDN), which has at least one in a personal communication network, functions as a database management system that stores and manages subscriber parameters and location information for all terminals registered in its PCN, while providing access to subscriber terminals. In addition to registering important data including basic services and supplementary services, the routing function of the called party A home location register (HLR) that performs the operation is connected.

Also, reference numeral 82 is connected to the INS 78 via a data link to access the No. 7 signaling matching subsystem for SS No-7 signal processing matching (ASS-7). ).

In FIG. 2, reference numeral 84 is a signal control (Work station) connected to the INS 78 (Central control system) consisting of a processor and a peripheral device for performing the overall operation management and maintenance functions of the corresponding exchange The CCS 78 is a CAMA (Centralized authomatic) that collects and processes billing data transmitted from the exchange 40 while interworking with the corresponding exchange 40 according to the connection standard between the personal communication exchange and the charging center. message accounting (86) is connected and OMC (Operation and Maintenance) that performs centralized operation / maintenance / maintenance functions for the entire component of the personal communication network while interworking with the switch 40 by the TMN Q interface. A maintenance center (NMC) 88 for managing a personal communication network is connected.

According to the personal communication switching system having such a configuration, when call setup is required from a mobile subscriber station (e.g., 10a) accommodated in the base station controller 30a, the personal communication switch 40 from the base station controller 30a according to the call setup request is required. In response to the call establishment request, the ASS-W 72a of the ASS-W 72a executes call setup processing for a mobile subscriber station or a wired subscriber terminal (e.g., 74) to be received in its own country, or a personal communication switch (e.g., 60) of another station. The call establishment process for the mobile subscriber station or the wired subscriber terminal accommodated in the above is governed, and the billing information is processed and transferred to the CAMA 86 through the CCS 84 for such call establishment request.

In addition, when a call setup is generated and transmitted to a mobile subscriber station (for example, 10a) received in the home country, the corresponding ASS-W 72a and the base station controller 30a of the personal communication switch 40 are transmitted. Call setting processing is performed for the subscriber station 10a to be received.

Here, when the mobile subscriber station 10a is absent or busy in the personal communication exchange system, it is impossible to receive an incoming call. Accordingly, the personal communication exchange can receive a call in the absence or incapable state of the subscriber. It is necessary to set a function related to switching.

The present invention has been made in consideration of the above situation, and provides a call forwarding processing method in a personal communication switching system for enabling call execution, unanswered, and unconditional execution of an incoming call function at the request of a personal communication subscriber. The purpose is.

In order to achieve the above object, according to a preferred embodiment of the present invention, a plurality of mobile subscriber stations are connected to each other via a plurality of base station controllers. A personal communication switching system having a connected personal communication switch, comprising the steps of: initiating the incoming call switching function when an incoming call to the subscriber terminal is generated while the incoming call switching function from a specific subscriber terminal is registered; Determining the call forwarding mode by performing authentication of a subscriber targeted for an incoming call forwarding function, executing a mobile paging process based on the determined call forwarding mode; Performing call setup by performing authentication procedure for the subscriber; The forwarding processing method for a personal communication exchange system consisting of a step for switching the incoming call of the subscriber terminals is provided in the step of performing broadcasting, the side of the called subscriber.

1 is a diagram illustrating a general personal mobile communication system;

FIG. 2 is a schematic block diagram of a personal communication switch shown in FIG. 1;

3 is a functional block diagram of an essential part of the personal communication exchange shown in FIG.

4 is a flowchart for explaining a call forwarding processing method in a personal communication switching system according to the present invention.

* Description of the symbols for the main parts of the drawings *

10: subscriber station, 20a-20n: base station,

30a-30n: base station controller, 40: exchanger,

50: Certification Center, 72a-72n: ASS-W,

78: INS.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 3 is a diagram showing the main function block configuration of the personal communication switch 40 executing the call forwarding processing method in the personal communication exchange system according to the present invention.

In the figure, the ASS-W, denoted by reference numeral 72a, is connected to the corresponding base station controller 30a via a signaling connection control part (SCCP) (not shown), so that the corresponding switch 40 and the base station controller ( A PCS interface control (PCSI) 90a-1 for processing a link management function used between the BSC; 30a, a base station system application part (BSSAP) function, and a partial mobility management (MM) connection maintaining function; In order to process the personal mobile communication subscriber signal from the PCSI 90a-1 while managing the outgoing / receiving process of the personal mobile communication subscriber station, the collection of information necessary for call processing, the number translation request, and the connection of the signal equipment and the switch PCC (PCS call control; 90b-2) for controlling the; Call processing service that performs basic encoding and decoding functions of component parameters by referring to connection function with TCAP, related operation with application processor, management of instruction number and dialog number, and operation / error definition while performing operation procedure. CPSC (Call processing service control) 90a-3 as control means; It includes the LSC 90a-4 that is responsible for the initialization (interfacing) of TLSI (LSI, TSL) that controls the signaling equipment and the T (Time) -switch, and the TSW 90a-5 for the control of the T-switch. do.

The second ASS-W 70b is composed of the PCSI 90b-1, the PCC 90b-2, the CPSC 90b-3, the TSW 90b-4, the GSC 90b-5, and the GSI 90b. -6), the N-th ASS-W 70n includes a PCSI 90n-1, a PCC 90n-2, and a TSW 90n-3.

In addition, the INS indicated by the reference numeral 78 includes an LCC (LR call control) 92a in which information on a subscriber station belonging to the corresponding exchange 40 is registered / outputted, and the LCC 92a is a mobile subscriber origination. In the case of providing the subscriber information to the PCC (90a-2; 90b-2; 90n-2) or when the mobile subscriber of the destination responds to paging (Paging) the subscriber information of the destination to the call control block When the TLDN allocation request for the mobile subscriber is called, the TLDN allocation function is performed. The INS 78 further includes a location register service control (LRSC) 92b for performing an operation processing procedure for the LCC 92a as a personal communication application unit (MAP), an interface between the LLU and the question-and-answer operation (TCAP); Number translation (NTR); 92c, which handles outgoing calls / incoming calls, incoming calls while translating international numbers, area codes, and country numbers, and obtains and processes the information of the called party by translating incoming calls. Switching network control (SNC) 92D, which allocates and releases calls for connection / disconnection of calls to the channels of the entire switch (TST switch network) of the personal communication system, and connect / disconnect to the call from the SNC 92d. Also included is a space switch (SSW) 92e. In addition, the INS 78 is connected to the HLR signally through the ASS-T (80) to access the HLR.

Next, a description will be made in detail with reference to the flowchart shown in FIG. 4 on the assumption that the first subscriber terminal 10a has registered a call forward for the call forwarding processing method in the personal communication exchange system according to the present invention. .

First, when the mobile subscriber station 10a becomes the calling party and the call setup request is transmitted to the first base international controller 30a, in step 100, the connection request for the call management service from the first base station controller 30a receives the SCCP. The message for the CM service request is transmitted to the PCSI 90a-1 of the ASS-W 72a of the exchange 40. Accordingly, the PCSI 90a-1 of the ASS-W 72a is transmitted. When the PCC 90a-1 forwards the CM service request, the PCC 90a-1 notifies the PCSI 90a-1 of the process ID, and then in step 102, requests the subscriber information from the LCC. When the subscriber information is provided from the LCC 92a according to the request, the PCC 90a-1 determines whether to apply the authentication procedure and encryption in step 104.

If it is determined that authentication and encryption are applied (YES in step 104), the PCC 90a-2 of the ASS-W 72a is authenticated by the calling subscriber to the LCC 92a of the INS 80 in step 106. Therefore, the LCC 92a of the INS 80 requests the authentication of the calling party to the LRSC 92b, and the LRSC 92b requests the HLR through the ASS-T 80. The authentication of the calling subscriber is required.

In response to the authentication request, the HLR notifies the LRSC 92b of the INS 80 of the originating subscriber's authentication result, and determines whether the authentication result and the unique attempt are applied in step 108.

As a result of the determination, if the authentication fails and the unique attempt is not applied (YES in step 108), in step 110, the PCC 90a-2 of the ASS-W 72a is commanded to release the PCSI 90a-1. Therefore, when the PCSI 90a-1 transmits a release message to the SCCP, the PCSI 90a-1 transfers a message indicating the connection rejection from the SCCP to the corresponding base station controller 30a, and terminates the call setup process.

On the other hand, if authentication fails in step 108 and the unique attempt is applied ('YES' in step 112), the process proceeds to step 114 and the PCSI (PCSI 90a-2) of the ASS-W 72a is applied. 90a-1) transmits an authentication request message, and the PCSI 90a-1 transmits a signal connection setting message for the authentication request to the SCCP. Accordingly, the PCSI 90a-1 transmits an authentication request message to the base station controller 30a. A connection establishment message will be sent.

Therefore, the base station controller 30a transmits a response message for authentication to the SCCP in step 116, and transmits an authentication response message to the PCSI 90a-1 of the ASS-W 30a in the SCCP. In the PCSI 90a-1, the authentication response is transmitted to the PCC 90a-2.

Then, the PCC 90a-2 determines whether the authentication failed in step 118. If the PCC 90a-2 of the ASS-W 72a determines in step 120 if the authentication fails, the PCC 90a-2 determines the PCSI ( The release command is transmitted to the 90a-1), and the PCSI 90a-1 transmits the release command message to the SCCP. Accordingly, the SCCP transmits a message of type 1 data about a release command to the base station controller 30a, and accordingly, transmits a type 1 data message about completion of release to the SCCP from the base station controller 30a. . Then, the SCCP transmits the released first type data message to the PCSI 90a-1 of the ASS-W 72a. Accordingly, the PCSI 90a-1 transfers the released data to the PCC 90a-2. In addition to transmitting a message for signal connection recovery (rejection) to the SCCP, and then the connection recovery message from the PCSI (90a-1) of the ASS-W (72a) to the SCCP, while the After the base station controller 30a transmits a recovery completion message to the SCCP, the call setup process ends.

On the other hand, if it is determined in step 112 that the authentication is successful and encryption is applied (YES in step 126), or in step 118, the authentication success is determined in step 118 without being determined to be authentication failure. If it is determined (YES in step 122), the PCC 90a-2 of the ASS-W 72a transmits an encryption command to the PCSI 90a-1 in step 124, and the PCSI 90a-1. ) Transmits an encrypted mode command message to the SCCP. Accordingly, the SCCP transmits an encrypted mode command data message to the base station controller 30a.

In response to the command, when the base station controller 30a transmits a data message indicating completion of the encryption mode to the SCCP, the SCCP sends the data of the encryption mode completion to the PCSI 90a-1 of the ASS-W 72a. The message is transmitted, and the PCSI 90a-1 of the ASS-W 72a notifies the PCC 90a-2 of the completion of encryption.

The PCC of the ASS-W 72a when the completion of encryption is notified and when the encryption procedure is not applied as a result of the determination in step 126 and when the authentication is successful and the encryption is not applied when the determination in step 122 is performed. 90a-2 notifies the PCSI 90a-1 of the acceptance of the CM service, and accordingly, the PCSI 90a-1 transmits a response of the signal connection message to the SCCP, which is the base station. The connection establishment message is transmitted to the controller 30a.

Accordingly, the base station controller 30a transmits a message requesting call setup to the SCCP in step 128 in response to the connection establishment message. Accordingly, in the SCCP, the PCSI 90a-1 of the ASS-W 72a is transmitted. Call setup request message is transmitted to the PCC 90a-1, and the call setup message is transmitted to the PCC 90a-2.

Then, the PCC 90a-2 of the ASS-W 72a determines the availability of the lake in step 130. If the determination is not possible, the process proceeds to step 132 to the PCSI 90a-1. The connection recovery command is transmitted, and the PCSI 90a-1 transmits a connection recovery (release) command message to the SCCP, and then the SCCP transmits a release completion command message to the base station controller 30a.

Then, when the PCC 90a-2 of the ASS-W 72a transmits a release command to the PCSI 90a-1, the PCSI 90a-1 delivers a release command message to the SCCP. In SCCP, the release command message is transmitted to the base station controller 30a.

In response to the release command message, the base station controller 30a transmits a release completion message to the SCCP, and the SCCP receiving the release completion message is connected to the PCSI 90a-1 of the ASS-W 30a. The release completion message is transmitted. Accordingly, the PCSI 90a-1 notifies the PCC 90a-2 of the release completion and transmits the release message to the SCCP.

Then, the SCCP transmits a recovery message to the base station controller 30a, and the base station controller 30a transmits a recovery completion message to the SCCP to complete call release.

On the other hand, if the determination is possible in step 130, the flow proceeds to step 134, the PCC (90a-2) of the ASS-W (30a) of the subscriber information to the LCC (92a) of the INS (80) Accordingly, the LCC 92a of the INS 80 notifies the PCC 90a-2 of the ASS-W 72a of the calling subscriber information, and the PCC 90a-2 The LCC 92a of the INS 80 registers the call setup state of the subscriber station 10a as the calling party and notifies the PCSI 90a-1 of the call setup process.

Then, the PCSI 90a-1 of the ASS-W 72a transmits a call setup process message to the SCCP, and the SCCP transmits a call setup process message to the base station controller 30a. In addition, the PCC 90a-2 of the ASS-W 72a transmits a command for setting a call path to the PCSI 90a-1 in step 136 to the SCCP in the PCSI 90a-1. Sending command request message is set as a call. Accordingly, the SCCP transmits a call setup request message to the base station controller 30a, and the base station controller 30a transmits a call setup complete message to the SCCP in response to the message.

Accordingly, the SCCP delivers a setting completion message to the PCSI 90a-1 of the ASS-W 72a by the PCSI 90a-1, and completes the setting of the call setting to the PCC 90a-2. You will be notified.

Subsequently, the PCC 90a-2 of the ASS-W 72a requests translation of the station number into the NTR 92c of the INS 80 in step 138, and the ASS-W ( The personal communication number is notified to the PCC 90a-2 of 72a. Accordingly, the PCC 90a-2 of the ASS-W 72a receives the call forwarding registration number in step 140 based on the number translation result. If it is determined that the authorization is not applicable, the process proceeds to step 142 and the release procedure is performed. If applicable, it is determined whether the call transfer registration is unconditionally called in step 144. Requests routing information to the HLR, and performs routing information request and response procedure of the CFU subscriber according to the response of the routing information.

If the result of the determination in step 144 is not CFU registration, it is determined whether the CFN registration is performed in step 150. In case of CFN registration, the flow proceeds to step 152 to request routing information request and response procedure of the CFN subscriber. Will run. In contrast, if the CFB is not registered as a result of the determination of step 150, the CFNA registration is determined and the routing information is requested to the HLR in step 154, and a response to the request is received.

That is, the LRSC 92b transmits the location information request to the HLR through the ASS-T 80. In response to the request, when the response of the location information request is transmitted from the HLR to the CPSC 90a-3 of the ASS-W 72a in step 178, the CPSC 90a-3 routes to the PCC 90a-2. In response to the request for information, the PCC 90a-2 of the ASS-W 72a requests number translation to the NTR 92c of the INS 80 in step 156.

In response to the request, when the personal communication number of the own country is notified from the NTR 92c to the PCC 90a-2 of the ASS-W 72a in step 158, the PCC 90a-2 of the ASS-W 72a is notified. In step 160, the mobile terminal transmits the paging request to the LCC 92a of the INS 80. Accordingly, the ASS− is received from the LCC 92a of the INS 80. The paging request is transmitted to the PCC 90n-2 of the W 72n.

Then, the PCC 90n-2 of the ASS-W 72n transmits a paging request response to the PCC 90a-2 of the ASS-W 72a in step 164, and the local area identification (LAI) According to the findings, the paging request is transmitted from the PCC 90n-2 of the ASS-W 72n to the PCSI 90n-1. Then, the paging request is transmitted from the PCSI 90n-1 of the ASS-W 72n to the SCCP existing between the ASS-W 72n and the corresponding base station controller 30n. The paging unit data message is transmitted to the controller 30n.

In response to the paging data, the base station controller 30n transmits a paging response connection request message to the SCCP, and transmits a paging response message to the PCSI 90n-1 of the ASS-W 72n from the SCCP. The PCSI 90n-1 transfers the paging response from the PCSI 90n-1 to the PCC 90n-2.

Accordingly, the PCC 90n-2 of the ASS-W 72n determines whether authentication and encryption are required in step 166, and if authentication and encryption is required, the process proceeds to step 168 and the LCC 92a of the INS 80 is determined. In this case, the LCC 92a transmits the authentication request of the called subscriber to the LRSC 92b, and requests the authentication of the called subscriber from the LRSC 92b to the HLR.

Subsequently, when the recipient authentication request response is transmitted from the HLR to the LRSC 92b of the INS 80, the response of the recipient authentication request is transmitted from the LRSC 92b of the INS 80 to the LCC 92a. The authentication request response message is transmitted from the LCC 92a to the PCC 90n-2 of the ASS-W 72n.

Then, if the PCC 90n-2 determines that the authentication failure and the unique attempt have been applied in step 170, the PCC 90n-2 proceeds to step 172 and transmits the called party's authentication request response to the PCSI 90n-1. At -1), the authentication request response message is transmitted to the SCCP, and the authentication request connection establishment message is transmitted to the base station controller 30n at the SCCP. Therefore, the base station controller 30n transmits an authentication response message to the SCCP, and the SCCP transmits an authentication response message to the PCSI 90n-1 of the ASS-W 72n, and the PCSI 90n−. In 1), the authentication response is transmitted to the PCC 90n-2.

On the other hand, if the authentication fails and the unique attempt is not applied (step 176 'YES'), the release procedure of step 178 is executed, whereas the determination result is that the authentication is successful and encryption is applied (YES in step 180). '), The process proceeds to step 174 to transmit an encryption mode command from the PCC 90n-2 of the ASS-W 72n to the PCSI 90n-1, which is encrypted by SCCP at the PCSI 90n-1. The mode command message is transmitted, and the SCCP transmits an encryption mode command message to the base station controller 30n.

Therefore, the encryption mode completion message is transmitted from the base station controller 30n to the SCCP, and the SCCP transmits the encryption mode completion message to the PCSI 90n-1 of the ASS-W 72n, and the PCSI 90n. In the case of -1), the encryption completion is transmitted to the PCC 90n-2.

If the completion of the encryption is notified or if it is determined in step 180 that authentication is not successful and encryption is not required, then the PCC 90n-2 of the ASS-W 72n performs an operation of the INS 80 in step 182. The recipient's information is requested to the LCC 92a, and the LCC 92a of the INS 80 registers the incoming call setup state with the PCC 90n-2 of the ASS-W 72n. The incoming subscriber occupancy notification is transmitted to the PCC 90a-2 of the ASS-W 72a.

Then, if the PCC 90a-2 of the ASS-W 72a requests a switch connection to the LSC 90a-4 in step 184, the LSC 90a-4 receives the SNC 92d of the INS 80. In this case, the SNC 92d of the INS 80 requests the switch connection to the SSW 92e at step 222 and the PCC 90a- of the ASS-W 72a. 2) to transmit the switch channel connection response.

Subsequently, when the PCC 90a-2 of the ASS-W 72a notifies the PCC 90n-2 of the ASS-W 72n in step 186, the PCC 90a-2 receives the switch connection. The PCC 90n-2 transmits a call setup request to the PCSI 90n-1, and the PCSI 90n-1 transmits a call setup request message to the SCCP in step 188. The call setup request message is transmitted to 30n. Subsequently, when the base station controller 30n transmits a call confirmation message to the SCCP in step 190, the SCCP transmits a call confirmation message to the PCSI 90n-1 of the ASS-W 72n. As the call confirmation message is transferred from the PCSI 90n-1 of the 72n to the PCC 90n-2, the PCC 90n-2 transmits a call setting command to the PCSI 90n-1. The PCSI 90n-1 transmits a call setup command message to the SCCP, and the SCCP transmits a call setup message to the base station controller 30n.

Then, the base station controller 30n transmits the call setup completion message to the SCCP, and the call setup completion message is transmitted from the SCCP to the PCSI 90n-1 of the ASS-W 72n. At 90n-1, the PCC 90n-2 is notified of the call path setting.

Subsequently, the base station controller 30n notifies the SCCP of the tone signal message in step 192, and the SCCP transmits the incoming tone signal message to the PCSI 90n-1 of the ASS-W 72n. At 90n-1, the PCC 90n-2 notifies the incoming tone signal. In that state, the PCC 90n-2 of the ASS-W 72n reports the incoming tone signal to the PCC 90a-2 of the ASS-W 72a in step 194, and thus the ASS. The PCC 90a-2 of the -W 72a notifies the PCSI 90a-1 of the calling party terminal 10a at step 196, and the PCSI 90a-1 notifies the tone signal with the SCCP. As the signaling message is transmitted, the tone signal message is transmitted from the SCCP to the base station controller 30a.

Subsequently, if it is determined in step 198 that the CFNA T / O is generated, the process proceeds to step 200, and the announcement broadcast connection procedure is performed to the GSC 90b-5 of the call forwarding side. After sending out the announcement about the announcement, in step 204, the announcement release procedure is performed. Subsequently, when the release procedure of the announcement is completed or when the CFNA T / O has not occurred as a result of the determination in step 198, the incoming subscriber's response is notified in step 206, and the recognition signal for the response notification is received. The call forwarding is completed. That is, the incoming subscriber response is notified from the PCC 90n-2 of the ASS-W 72n to the PCC 90a-2 of the ASS-W 72a. As the PCC 90a-2 transmits the incoming subscriber response to the PCSI 90a-1, the PCSI 90a-1 transmits the incoming subscriber response message to the SCCP, and the base station controller 30n at the SCCP. Send an incoming subscriber response message.

Accordingly, in step 244, the base station controller 30a transmits the called party response recognition message to the SCCP, and the SCCP informs the PCSI 90a-1 of the ASS-W 72a to notify the called party response. Accordingly, the PCC 90n-2 of the ASS-W 72n notifies the called party identification to the PCSI 90n-1 in step 246, so that the PCSI 90n-1 recognizes the called party response with the SCCP. Sending a message completes the call setup process.

As described above, according to the call forwarding processing method in the personal communication switching system according to the present invention, the incoming call to the subscriber is automatically switched to a specific called number or voicemail in response to a request from the personal communication subscriber. In addition, it is possible to provide a further improved function of incoming call processing for personal communication subscribers.

Claims (3)

A personal communication exchange system comprising a plurality of ASS-Ws connected to each other through a plurality of base station controllers corresponding to a plurality of mobile subscriber stations, and a personal communication switch connected to the HLRs via INS and ASS-T. Initiating the call forwarding function when an incoming call to the subscriber terminal is generated when the incoming call switching function from a specific subscriber terminal is registered; Determining the call forwarding mode by executing authentication for a subscriber that is the target of the call forwarding function; Executing a mobile paging process based on the determined incoming call switching mode; Performing a call setup for an incoming subscriber as a target of the mobile paging; Performing a guide broadcast on an incoming call switching to the called party; And forwarding the incoming call of the subscriber station to the called party. 2. The personal communication of claim 1, wherein in the call forwarding service start step, it is determined whether to perform an authentication procedure for the subscriber terminal and whether encryption is applied, and if necessary, perform an authentication procedure for the HLR. Method of handling call forward in exchange system. The method of claim 1, wherein the call forwarding mode comprises unconditional call forwarding, no answer forwarding, and call forwarding.