KR19980022227A - Handoff Processing Method in Personal Communication Switch - Google Patents

Abstract

The present invention relates to a handoff processing method in a personal communication switch, wherein the personal communication subscriber station manages a plurality of base station controllers and a plurality of base station controllers for handoff processing for maintaining a call when moving to an adjacent cell. It consists of one exchange, which exchanges a plurality of ASS-Ws 62a-62n, SNCs 102 and SSWs 104, including a T-switch for call setup to the subscriber station 10. In the personal communication exchange system including the INS 66 including the INS 66, the subscriber station 10 calls the subscriber terminal 10 in the state where the subscriber terminal 10 sets the call. The first AS-W to which the terminal 10 is connected is judged whether or not to perform the handoff function and based on the determination result of the handoff possibility of the subscriber station 10, the current first base international language. Requests a handoff to a second ASS-W that manages a second base international controller at a target location to which the subscriber station 10 is moved, and interoperates with the second ASS-W corresponding to the second base international controller at the target location. Performing handoff acceptance processing for the subscriber station, and assigning radio resources in the current base station international controller according to the handoff acceptance processing in the second base international controller and the second ASS-W to which the subscriber terminal is moved; It releases and finishes the exchange internal handoff process.

Description

How to Handle Handoff in Personal Communication Switch (EXCHANGE)

The present invention relates to a handoff processing method in a personal communication exchange. More particularly, when a subscriber station capable of wireless mobile communication moves from a cell originating a call to an adjacent cell managed by another base station controller, the terminal The present invention relates to a handoff processing method in a personal mobile switch (BS) for receiving a new channel from a base station controller that manages a cell in which a cell is currently located and maintaining the call.

As is well known, in the exchange where a plurality of terminals are connected through a subscriber line, the call can be set up only at the location where the subscriber line is installed, and in recent years, without being subject to much local or local restrictions. There is a situation in which a personal mobile communication method capable of establishing a call is noted.

In order to realize such personal communication, it is a wired / wireless integrated system that adds the wireless subscriber processing function in addition to the service processing function of the existing wired subscriber, and provides various services provided by the personal communication network. In order to provide services and various communication services, a personal communication exchange (Personal communication exchange) for providing interworking functions with other networks (ISDN, PLMN, etc.) that is heterogeneous with the personal communication network has been proposed and applied to practical use.

1 is a schematic block diagram of a general personal communication system.

In the figure, reference numeral 10 denotes a subscriber terminal referred to as a so-called 'mobile phone' which a personal subscriber can carry.

Reference numeral 20a-20n denotes a base station that transmits / receives call processing data with the subscriber station 10 to perform transmission / reception of a radio signal to the subscriber station 10, conversion of communication protocols, encryption / decryption, and the like. Indicates.

In addition, 30a-30n represents a base station controller that manages a plurality of base stations 20a-20n and performs functions related to allocation control of a communication channel to the subscriber station 10 and determination of handover.

In addition, 40 denotes a personal communication switch interfaced with the base station controllers 30a-30n: 30 and the IS-651 / IS-634 standard, and 50 denotes a subscriber information management device (Home) described later for each subscriber station 10. Represents an authentication center that is matched with a location register (HLR) to perform an authorization process for an arbitrary subscriber station 10 or the like.

FIG. 2 is a view for explaining a schematic configuration of the personal communication switch 40 shown in FIG. 1, in which 62a to 62n 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 (62a-62n) 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, 64 denotes an access switc-hing sub-system for subscriber (ASS-S) for executing a call processing function of an existing wired analog subscriber terminal, and the ASS-S (64). In addition, most call processing functions for wired subscriber terminals or their own operation preservation functions will be performed, and if necessary, the system will have a horizontal structure so that it can be expanded in units of ASS-S.

In FIG. 2, reference numeral 66 denotes the overall call processing of the corresponding personal communication switch 40 through the data link (ie, the optical link) for the ASS-W (62: 62a-62n) and the ASS-S (64). / Interconnection network subsy-stem (INS) responsible for administrative control, the INS 66 is a time that is located in the ASS (62, 64) for the configuration of the switching network (TST) In addition to including a space switch associated with the location (T), the mobility management, such as storage and management of information about the subscriber station 10 existing in the service area of the corresponding personal communication switch 40 A VLR (Visitor Location Register) is placed for the 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 addition, in FIG. 2, reference numeral 68 is connected to the INS 66 via a data link to access a No-7 signal matching exchange subsystem for SS No-7 signal processing matching (Access switc-hing subsystem for No-7). signaling: ASS-7).

70 denotes an access switching subsystem for trunk (ASS-T), which includes an public switched data network (PSDN) and a telephone. / Integrated service digital network (ISDN) for the unification of exchange / transmission / subscriber terminals, based on digital technology, to provide telegraph and various vision system services. It functions as a database management system that stores and manages subscriber parameters and location information for all terminals registered in its PCN, and registers important data including accessibility of terminals, basic services and additional services. The HLR (Home location register) is connected to perform the routing function.

In addition, in Fig. 2, 72 shows CAM-A (Cen-tralized authomatic message accounting) for collecting and processing charging data transmitted from the exchange while interworking with the connection standard between the personal communication exchange and the charging center for the corresponding exchange.

In addition, 74 indicates a central control system (CCS) including a processor and a peripheral device connected to the INS 66 in a signal (Work station) to perform overall operation management and maintenance functions of a corresponding exchange, The CCS 74 includes an operation and maintenance center (OMC) that performs centralized operation / maintenance / maintenance functions for all components constituting a personal communication network while interworking with a TMN Q interface to a corresponding exchange. A network management center (NMC) for managing a personal communication network is connected.

According to the call setup procedure for the personal mobile communication executed by the personal communication exchange system having the above-described configuration, in the case of the outgoing signal processing procedure from the subscriber station 10, the subscriber station 10 has a corresponding base station (eg, 20a When a message for requesting a layer 2 response message is transmitted to the base station controller 30a that manages the base station 20a, the base station controller 30a receives a response to the subscriber station 10. In addition to transmitting a message (base station acknowledge order), a corresponding service request message (CM service request) is included in COMPLETE LAYER 3 to the corresponding exchange 40. Therefore, the exchange 40 performs the authentication procedure by the authentication center 50 in response to the service request message. When the authentication procedure is performed with the support of the authentication center 50, the exchange 40 Signal channel connection establishment is performed using an SCCP primitive. In this case, the exchange 40 transmits a message (SCCP connection confirmed) to the base station controller 30a.

Subsequently, when the message connection is confirmed, the base station controller 30a transmits a SET-UP message to the switch 40 to provide information for setting up a call, and receives the SET-UP message. The exchange 40 transmits a message (call proceeding) to the base station controller 30a to initiate a call setup procedure at the network side to notify the status of rejecting the reception of additional call setup information.

Then, the switch 40 transmits an assignment request for requesting radio resource allocation (traffic channel) to the base station controller 30a, and receives the message (Assignment reqeust). In 30a), a perfect audio path is connected to a wired line, and a terminal assignment message is transmitted to the terminal 10 through a paging channel of a wireless interface to configure a wireless traffic channel. Done.

Therefore, the terminal 10 transmits a message (Traffic channel preamble) through the designated reverse traffic channel, and when the base station controller 30a recognizes the reverse traffic channel through the base station 20a, the base station controller ( 30a) transmits a message requesting a layer 2 acknowledgment message (base station acknowledge order) to the terminal 10 in a forward traffic channel.

When the terminal 10 receives a request from the base station controller 30a transmitted through the traffic channel, the terminal 10 transmits a message for a mobile station acknowledge order to the base station controller 30a. Accordingly, the base station controller 30a transmits a message (Service option response order) for detailed enumeration of the service configuration for the call to the terminal 10, and the terminal 10 processes the traffic according to the detailed service specification. Will be started.

In addition, the base station controller 30a transmits an assignment message to the exchange 40 in a state where a wireless traffic channel and a wired line are set.

On the other hand, when the called party is notified that the call is in progress, the switch 40 transmits an alerting message to the calling base station controller indicating the status of the call, while the ringback tone exists if a call response is received by the called party. In addition, the switch 40 transmits a message indicating a connection state to the base station controller 30a by connecting the wired channel to the called party, and thus the base station controller 30a. In response to the message (Connect message), the acknowledgment message (Connect acknowl-edge) is transmitted to the exchange 40 side.

If a call is set up from the terminal 10 by such a procedure, if the target for setting up the call is a subscriber terminal (eg, 10b) managed by the switch 40, the call from the originating terminal 10 is called. The call is routed to the T-switch of the corresponding ASS-W (e.g. 62b) via the T (Time) -switch of the ASS-W 62a to which the signal corresponds and the S (Space) -switch of the INS 66. Then, the terminal of the call setup target is called through the corresponding base station controller (for example, 30b).

If the call setup target is a wired subscriber terminal connected to the ASS-S 64, the T-switch of the ASS-W 62a, the S-switch of the INS 66, and the ASS-S ( Through the T-switch of 64), the connection with the wired subscriber terminal of the call setup target is made.

And, in the case of the communication network (PSTN, ISDN) that the call setup target is heterogeneous, call setup is performed through the ASS-T 70 via the INS 66.

In the state where the call is executed by such call setup, the charge is settled by the CCS 74 and the normal charge is transferred to the CAMA 72.

Then, according to the procedure of the call incoming to the terminal 10, for example, when a call is set up from the wired subscriber terminal connected to the ASS-S 64 to the terminal 10 of the mobility, the exchange 40 In step 10, the base station controller (for example, 10a) which manages the incoming call destination terminal 10 transmits a paging request for incoming call processing, and the base station controller 10a transmits a paging channel. A page message including an address of the terminal 10 is transmitted. Accordingly, the terminal 10 transmits a page response for a paging response through an access channel.

Subsequently, the base station controller 30a transmits a 'PAGING RESPO-NSE' message including layer 3 information to the switch 40, and successfully receives the page response to the terminal 10. It will send a message (Base station acknowledge order).

In addition, the switch 40 transmits a set-up messa-ge to the base station controller 30a, and the base station controller 30a receives the set-up message. 40) a call confirmed message is stored. Subsequently, the exchange 40 transmits an assignment re-qeust message to the base station controller 30a for a radio channel allocation.

Upon receipt of an assignment request message from the switch 40, the base station controller 30a connects a complete audio path to the wired line and sets a message for setting up a wireless traffic channel. A channel assignment message) is transmitted to the terminal 10 via the paging channel of the wireless interface.

Then, the terminal 10 transmits a message (Traffic channel preamble) to the base station controller 30a through the designated reverse traffic channel. Accordingly, when the base station controller 30a recognizes the reverse traffic channel, the base station The controller 30a transmits a base station acknowledge order to the terminal 10 through a forward traffic channel.

When the terminal 10 receives a command of the base station controller 30a, a message for a mobile station acknowledge order is transmitted to the base station controller 30a. Accordingly, the base station controller 30a receives a call. Send a message (Service option response order) for enumerating the service configuration for the details to the terminal (10).

Accordingly, the terminal 10 performs traffic processing according to a detailed service specification, and when the wireless traffic channel and the wired line are established, the base station controller 30a transmits a message (Assignment complete) to the switch 40. In addition, a ring is generated by transmitting an alert message including information to the terminal 10, and the subscriber station 10 transmits a mobile station acknowledgment to the base station exchange 30a. Done.

The base station controller 30a transmits an alerting message for notifying the switch 40 of the state of calling the terminal 10 to be called. When the base station controller 30a receives a response from the called user, the terminal ( 10) transmits a message (Connect order) requiring an acknowledgment to the base station controller (30a).

Accordingly, the base station controller 30a transmits a base station acknowledgment message to the terminal 10 through a forward traffic channel for a response to the message. In addition, the base station controller 30a ) Transmits a message (Connect message) for informing the reception of an incoming response to the exchange 40. Accordingly, the exchange 40 transmits a message (Connect acknowledge) for receiving an acknowledgment of the message (Connect message) to the base station controller (30a), so that the incoming call processing procedure to the terminal 10 side Will be executed.

By the way, the mobile subscriber station 10 first initiated the call in the state where the call was set up by the originating call processing procedure from the terminal 10 or the incoming call processing procedure for the terminal 10. When moving from a cell to an adjacent cell managed by another base station controller, a call can be made by the terminal 10 only when the terminal receives a new channel from the base station controller that manages the cell where the terminal is currently located and maintains the call. For this reason, the setting of the handoff function is required for the personal communication exchange.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and when a terminal for mobile communication is moved from a base station controller that manages a cell in which it is currently located to an adjacent cell, handoff processing for the terminal is performed smoothly, and the call to the terminal is performed. It is an object of the present invention to provide a handoff processing method in a personal communication exchange to maintain a.

In order to achieve the above object, according to a preferred embodiment of the present invention comprises a plurality of base station controllers responsible for wireless call setup for personal mobile communication subscriber terminal and at least one switch that manages the plurality of base station controllers. In the personal communication exchange system comprising a plurality of ASS-W including a T-switch for call setup to the subscriber terminal, and the INS including SNC and SSW, A first step of determining whether or not to perform a handoff function to a first ASS-W to which the subscriber terminal is connected in the current first base station of the international terminal set by the subscriber terminal while performing call setup; The handoff possibility of the subscriber station is determined based on the determination of the target position to which the subscriber station is moved in the current first A second process of requesting a handoff to a second ASS-W governing a second base international controller, and accommodating the handoff to the subscriber terminal in association with the second ASS-W corresponding to the second base international controller at the target location; In the third process of performing the operation, the internal handoff processing of the exchange is performed by releasing the allocation of radio resources in the current first base international controller according to the handoff acceptance processing in the second base international controller and the second ASS-W to which the subscriber terminal is moved. Provided is a handoff processing method in a personal communication switch having a fourth process of completing the process.

Preferably, the first process includes the steps of: inquiring whether handoff is possible to the PCSI of the first ASS-W at the first base station in the current location; and handoff to a handoff control (HOC) in the PCSI. And inquiring whether the HOC is a switch internal handoff or a switch external handoff according to the inquiry, and performing a handoff processing procedure of the subscriber station if the internal handoff is performed. .

In the second process, the HOC of the first AS-W, which is in charge of the first base international controller at the current location of the subscriber station 10, informs the PCSI of the process ID and manages the second base international controller at the target location. Requesting handoff acceptance to the HOC of the second ASS-W; requesting handoff acceptance to the second base international controller of the target position at the HOC of the second ASS-W that is requested to accept the handoff; the target position Notifying the first AS-W that is in charge of the first base international flag of the current location on the basis of the handoff acceptance notice at the second base international flag of the second base station; Requesting the connection of the S-switch to the PCSI in the HOC of the first ASS-W and requesting the connection of the S-switch to the INS side in the PCSI in response to the request.

In addition, the step of requesting the connection of the S-switch to the INS side requests the SSW to connect to the SSW in the SNC in the INS, and in response to the request, when the SSW completes the connection of the S-switch, the current position The completion of the S-switch connection to the HOC of the first AS-W, which is in charge of the first base international fisherman, and the PCSI of the first AS-W in charge of the first AS-W at the current location. .

According to the present invention, the third process includes the step of requesting a T-switch connection to the PCSL at the HOC of the second AS-W which is in charge of the second base international controller of the target location to which the subscriber terminal is moved, and the first ASS. The PCSI of W notifying the first base international flag of possible handoff, the first base international flag notifies the PCSI of the first ASS-W that the handoff is in progress, and the PCSI notifies the HOC of the handoff progress. And notifying the PCSI of the second ASS-W of the handoff completion in the second base international controller of the target location and notifying the corresponding HOC of the handoff completion in the PCSI of the second ASS-W. The handoff completion is notified to the HOC of the first ASS-W.

The fourth process may further include requesting connection of a T-switch to the corresponding PCSL at the HOC of the first ASS-W upon completion of the handoff, and requesting radio resource release to the corresponding PCSI. In response to the request, requesting radio resource release from the PCSI to the first base international controller; in response to the request, the first base international controller notifies the PCSI of radio resource release, and then the PCSI informs the corresponding HOC. And notifying release of radio resources.

According to the handoff processing method in the personal communication exchange according to the present invention having the above-described configuration, the handoff processing is performed by the personal mobile communication subscriber station from the first base international controller at the position for setting up the call to the corresponding ASS-W of the exchange. As required, a handoff processing procedure is performed between the second base international controller and the corresponding ASS-W to which the subscriber terminal moves, so that a call to the subscriber terminal is maintained.

1 is a diagram illustrating a general personal mobile communication exchange system.

FIG. 2 is a schematic block diagram of a personal communication exchange employed in FIG.

3 is a block diagram showing the main parts of a personal communication switch implementing the handoff processing method according to the present invention;

4 is a flowchart illustrating a handoff processing procedure by the handoff processing method in a personal communication switch according to the present invention.

* Explanation of symbols for main parts of the drawings

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

30a-30n: base station controller 40: switchboard

50: Certification Center 62a-62n: ASS-W

64: ASS-S 66: INS

68: ASS-7 70: ASS-T

92a, 92b, 92: PCSL 94a, 94b, 94: HOC

96a, 96b, 96: PCSI 102: SNC

104: SSW

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

3 is a diagram showing internal functional blocks of the ASS-W 62a-62n: 62 and the INS 66 applied to the processing of the handoff function in the exchange according to the present invention. ) Is a functional component for executing the handoff processing function in the exchange.It is composed of a call processing command procedure and a database that are commonly used by a number of execution modules. It analyzes the information of the mobile subscribers who are handoffed for handoff processing and the CSL (Perso-nal call processing system library) 92, in which the information necessary for calling and using is pre-stored in the call register. By determining whether it is a handoff that is received inside the exchange or a handoff that is received by another exchange, the exchange and handoff of status information for the mobile subscriber who is handoff is performed. HOC (Handoff control: 94) that controls switch connections between outgoing and incoming cells, link management between the corresponding switch and the base station controller, BSSAP (base station system application part) functions, or some mobility management (MM) access It includes a PCSI (PCS interface control) for performing the exchange of status information for the mobile subscriber handed off with the HOC 94 while processing the maintenance function.

In addition, the INS 66 is equipped with an INP (Interconnection Network Processor) for proactive control regarding search and management of a call using a space switch, and the INP is an entire switch of a personal communication system in relation to a handoff function. A switch-ing network control (SNC) 102 that performs allocation and release functions for connection / disconnection of a call to a channel of the (TST switch network) and the HOC 94 of the ASS-W 62. It includes a space switch (SSW) 104 that controls the switch connection between the cell that is off / outgoing.

Next, the handoff processing method in the personal communication switch according to the present invention executed by the above configuration will be described in detail with reference to the flowchart shown in FIG.

First, in step 200, a specific subscriber station 10 is connected to a subscriber station managed by, for example, the n-th base international flag 30n, under the control of the first base international flag 30a, and the call setting is performed. 10) is moved to an adjacent cell managed by, for example, the second base international controller 30b, the base station controller 30a at the current location where the subscriber station 10 first set up the call in step 202. The PCS (PCS interface control) 96a configured in the -W 62a, which is responsible for the link management function of the exchange and the base station control period, inquires about the possibility of handoff.

Then, in step 204, the PCSI 96a inquires about the possibility of handoff for the HOC (Handoff control) 94a, which manages the handoff process of the mobile subscriber station. Accordingly, the HOC 94a determines in step 206 whether the interrogated handoff is a handoff in the exchange, and if it is not a handoff in the exchange, proceeds to step 208 to determine the handoff function outside the exchange / On the other hand, if the determination result in step 206 indicates that the HOC 94a informs the PCSI 96a of the HOC process ID in step 210, the HOC 94a targets the subscriber terminal 10 to move. The HOC 94b configured at the location's ASS-W (eg, 62b) will require acceptance of the handoff.

Accordingly, the HOC 94b configured in the ASS-W 62b of the target position requests the acceptance of handoff to the PCSI 96b configured in the ASS-W 62b in step 212, and the PCSI 96b. Requires the base station controller 30b of the target position to accept the handoff. In response to the request for accepting such a handoff, the base station controller 30b notifies the PCSI 96b of the ASS-W 62b of accepting the handoff in step 214, whereby the PCSI 96b receives the request. The handoff acceptance notification from the base station controller 30b is forwarded to the HOC 94b.

Accordingly, the HOC 94b of the ASS-W 62b notifies the HOC 94a of the ASS-W 30a in step 26 of accepting the handoff, and if the acceptance of the handoff is notified, the HOC. 94a requests the connection of the S-switch for handoff processing to the PCSL 92a side which governs the entire call processing procedure in step 218, in response to the connection request of the S-switch. SNC (Switching Network Control) that configures the INS (66) and performs the functions of allocating and releasing a call for connection / release of a call to the channels of the entire switch (TST switch network) of the personal communication system in relation to the handoff function: 102, the connection of the S-switch is required.

Then, the SNC 102 is configured in the INS 66 in step 220 to request the connection of the S-switch to the space switch (SSW) 104 which controls the switch connection between the cells where the handoff is originated / received. When the SSW 104 performs the S-switch connection, the SSW 104 notifies the HOC 94a of the completion of the S-switch connection.

Accordingly, when the HOC 94a is notified of the completion of the connection of the S-switch from the SSW 104, the HOC 94a notifies the PCSL 92a of the S-switch and the ASS-W 62b of the ASS-W 62b. Information on the S-switch is also notified to the HOC 94b, and the HOC 94a notifies the PCSI 96a of the possibility of handoff.

The HOC 94b of the ASS-W 62b then requests a T-switch connection of the corresponding ASS-W 62b to the PCSL 92b in step 224.

In addition, when the PCSI 96a is notified of the handoff from the HOC 94a in step 222, the PCSI 96a notifies the base station controller 30a of the handoff possibility in step 226. 30a) notifies the PCSI 96a of the handoff in progress at step 228 and also informs the HOC 94a of the handoff in progress.

When the base station controller 30b at the target position completes the handoff, the base station controller 30b notifies the PCSI 96b of the handoff completion in step 230, and the PCSI 96b notifies the HOC 94b of the handoff completion. You will be notified.

Therefore, the HOC 94b notifies the HOC 94a side of the ASS-W 62a in step 232, and the HOC 94a responds to the notification of the handoff completion in step 234. Therefore, the front junctor T-switch is connected to the PCSL 92a and the radio resource is released to the PCSI 96a.

In response to the request for release of the radio resource, the PCSI 236 requests the release of the radio resource from the base station controller 30a in step 236. Accordingly, the base station controller 30a sends a request for the subscriber station 10 to the base station controller 30a. Radio resources are released.

When the release of the radio resource is completed, the base station controller 30a notifies the PCSI 96a of the radio resource release in step 238, and the PCSI 96a informs the HOC 94a in response to the notification. The radio resource release is notified, and when the radio resources are released to the base station controller 30a, an intra-switch handoff for the subscriber station 10 is completed (step 240), so that the subscriber station 10 The call can be maintained even when moved to an adjacent cell.

Preferably, the above-described processing of the in-switch handoff function according to the present invention is applied not only in the state of the originating or incoming call to the mobile subscriber station 10 but also the counterpart of the call establishment with the subscriber station 10 is wired. The same or similar applies to a subscriber station or a mobile subscriber station.

As described above, according to the handoff processing method in the personal communication switch according to the present invention, even when the personal subscriber station moves from the base station controller to which the call is set to the adjacent cell, the base station controller, the personal communication switch and the hand of the current location are located. As the handoff processing function for maintaining the call of the subscriber station is performed in the base station control period of the off target position, the call can be maintained in the same exchange even if the mobile subscriber station moves between cells.

Claims (6)

And a plurality of base station controllers in charge of wireless call setup for the personal mobile communication subscriber station 10 and at least one exchange that manages the plurality of base station controllers. Multiple matching subsystems including T-switches for call setup (ASS-W: 62a-62n) and network control subsystems including switching network control (SNC) 102 and space switch (SSW: 104) (INS: 66), comprising: a current call set by the subscriber station (10) of the plurality of base station controllers in a state of performing call setup for the specific subscriber station (10); A first process of determining whether or not to perform a handoff function to a first ASS-W to which the subscriber terminal 10 is connected in the first base international controller; and the possibility of handoff of the subscriber terminal 10 based on the determination A second process of requesting a handoff from the current first base international controller to a second ASS-W that manages the second base international controller of the target location to which the subscriber terminal 10 is moved; in the second base international controller of the target location A third process of performing a handoff acceptance process for the subscriber station in association with the corresponding second ASS-W, and according to the handoff acceptance process in the second base international controller and the second ASS-W to which the subscriber terminal is moved; And a fourth process of releasing the allocation of radio resources in the current first base station and completing the internal handoff processing in the exchange. The method of claim 1, wherein the first process comprises: inquiring whether the first AS-W PCSI is capable of handoff at the first base international controller at the current location; and handoffing to a handoff control (HOC) at the PCSI. And inquiring whether the HOC is a switch internal handoff or a switch external handoff according to the inquiry, and performing a handoff processing procedure of the subscriber station if the internal handoff is performed. A handoff processing method in a personal communication switch, characterized in that. 2. The second base station of claim 1, wherein the second process informs the PCSI of the process ID in the HOC of the first AS-W, which is in charge of the first base international controller of the current location of the subscriber station 10. Requesting handoff acceptance to the HOC of the second ASS-W that is in charge of the controller, and requesting handoff acceptance to the second base international controller at the target location at the HOC of the second ASS-W that is requested to accept the handoff; Notifying handoff acceptance to the first ASS-W governing the first base international flag of the current location based on the handoff acceptance notice at the second base international flag of the target location, the first base station of the current location; Requesting the connection of the S-switch to the PCSI at the HOC of the first ASS-W that controls the controller and requesting the S-switch to be connected to the INS from the PCSI in response to the request. A handoff processing method in an intercom exchange. 4. The method of claim 3, wherein the step of requesting the connection of the S-switch to the INS side requests the SSW to be connected to the SSW by the SNC in the INS, and the SSW completes the connection of the S-switch in response to the request. The S-Switch is notified of the completion of the S-switch connection to the HOC of the 1ASS-W, which is in charge of the first base international fishing gear at the current location, and the handoff is possible for the PCSI of the 1ASS-W, which is in charge of the first base international fishing gear at the current location. Handoff processing method in a personal communication switch, characterized in that the notification. The method of claim 1, wherein the third process comprises the step of requesting a T-switch connection to a PCSL at a HOC of a second ASS-W that manages a second base international controller of a target location to which the subscriber terminal is moved. The PCSI of W notifying the first base international flag of possible handoff, the first base international flag notifying the PCSI of the first ASS-W that the handoff is in progress, and the PCSI notifying the HOC of the handoff progress. In the second base station of the target location, notifying the PCSI of the second ASS-W of the handoff completion, and notifying the corresponding HOC of the handoff completion in the PCSI of the second ASS-W; Handoff processing method in a personal communication switch comprising the step of notifying the completion of the handoff to the HOC of 1ASS-W. 4. The method of claim 1, wherein the fourth process requires that a T-switch is connected to the corresponding PCSL at the HOC of the first ASS-W upon completion of the handoff, and to release the radio resource to the corresponding PCSI. Requesting radio resource release from the PCSI in response to the request by the PCSI; in response to the request, notifying the PCSI of the radio resource release to the PCSI in response to the request; And notifying radio resource release to the corresponding HOC.