KR101552728B1 - - method for processing mobile terminated call of soft mobile switching center and mobile telecommunication system for the same - Google Patents

Abstract

A mobile communication system and a method capable of direct reception using a soft switching center without using an exchange in a mobile communication network and a relay facility in a soft exchange period are disclosed. According to one embodiment, in response to a call setup request from an originating exchange, a serving exchange, which is a destination exchange, determines whether or not the neighboring exchange paging is allowed (ISPAGE), and when an ISPAGE is granted, And the neighboring exchange performs paging to register the location of the called terminal in the paging response, allocates the routing information (TLDN) to the serving exchange, and the serving exchange transmits the TLDN to the originating exchange in the call setup response message . The originating exchange relays the call to the neighboring exchange using the TLDN, and the neighboring exchange routes the call using the TLDN without paging.

Soft Switching, Paging, Mobile Communication, Incoming, MSC, ISUP

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for processing an incoming call to a SOFT-MSC and a mobile communication system for the same,

The present invention relates to a mobile communication system, and more particularly, to a method for directly transmitting an incoming call to a soft exchange without using a relay facility between an MSC and a Soft-MSC in a mobile communication network, To a mobile communication system.

The mobile communication network includes a home location register (HLR), a mobile switching center (MSC), a base station controller (BSC), a base station transceiver subsystem (BTS), a mobile station ), A plurality of exchanges are connected to the home location register, and a control station and a base station are connected to the exchange to enable call setup of the mobile terminal. In recent years, Soft-MSCs are being installed in areas where shaded areas need to be removed and subscriber capacity expansion is required.

The mobile terminal paging (act of locating the corresponding terminal) performs paging by separating it into an arbitrary area unit called an area PAI (Paging Area Identity) that can be controlled by the exchanger for each exchange. The classification criteria for PAI are not specific to some of the control stations or some of the base stations, but are arbitrary, depending on the regional characteristics of the area. One exchange controls one PAI and manages the control station and base station information belonging to the corresponding PAI for each PAI, and one PAI can have a maximum of 128 sub-PAIs, for example, from PAI0 to PAI127. In the mobile communication network, the location information of the mobile terminal always includes PAI information, control station information, and base station information. When an arbitrary subscriber requests an incoming call to the mobile terminal, the exchange fetches the location information of the mobile terminal from the home location register, and then uses the information to request paging from all base stations belonging to the PAI.

Normally, the NID (exchange number) of the exchange and the soft exchange is treated in the same way to prevent location registration (due to parameter change) frequently occurring in the boundary area between exchanges and soft exchanges during the construction of soft exchanges. If the NID is the same, no attempt is made to reach the soft switching area because no location registration occurs in the soft switching area. Even if the NID is different between the exchanger and the soft exchanger, the following problems arise.

When the mobile terminal is located at the boundary of two exchange areas, the "Inter System Paging function", which is an incoming call handling method in the exchange boundary area, follows the InterSystemPage2 function of the IS41 standard. This function is operated by the serving exchange (exchange or soft exchange) to page the mobile terminal when the call is received via the TLDN (or MDN) from the home location register. If the presence of a mobile terminal is confirmed at a neighboring exchange (soft exchanger or exchange), the call can be forwarded to the adjacent exchange only through the exchange facility. That is, in one exchange, the neighboring base station list is provided for each paging area (PAI), and the paging is performed to the PAI to which the base station registered last position of the called terminal belongs and the neighbor base station registered in the corresponding PAI. The Inter System Paging function is determined by the serving exchange (the exchange in which the VLR of the called subscriber exists), and the neighboring exchange that received the ISP2 (InterSystemPage2) operation processes the paging to the base station belonging to the cell list in the ISP2 operation. When the serving exchange (the local exchange in which the called subscriber's VLR resides) receives the ISP response (if the terminal responds to the actual ISP) message from the neighboring exchange, the relaying facility in a separate software processing block dedicated to call processing with the adjacent exchange After the occupation, connect to the next exchange. In this case, both the originating exchange, the serving exchange (local exchange), and the neighboring exchange are all connected.

In this way, the Inter System Paging function for processing incoming calls in the border area of the exchange is called by a neighboring exchange through a service exchange between a serving exchange and a neighboring exchange. In this case, an originating exchange, a serving exchange, All the exchanges are connected to the call path, but the actual call processing becomes the originating exchange and the adjacent exchange. Therefore, the serving exchanger that processes the inter-system relay needs to have separate call processing blocks and modules for the relay processing, and the efficiency of the trunk resource is degraded because the relay section is used.

Especially, when the conventional Inter System Paging function (ISP2) is used to process the incoming call to the soft exchange, separate call processing block and relay line occupation are required between the exchange and the soft exchange.

An object of the present invention is to provide an improved Inter System Paging function (ISP2) and a method for directly transmitting an incoming call to a soft exchanger without using a relay facility between a MSC and a Soft-MSC in a mobile communication network, And to provide a mobile communication system.

According to an aspect of the present invention, there is provided a mobile communication system and a method capable of direct reception using a soft switching center without using an exchange in a mobile communication network and a relay facility in a soft exchange period. According to one embodiment, in response to a call setup request from an originating exchange, a serving exchange that is a destination exchange determines whether a paging permission of a neighboring exchange is 'ISPAGE', and when an ISPAGE is granted, And the neighboring exchange performs paging to register the location of the called terminal in the paging response, allocates the routing information (TLDN) to the serving exchange, and the serving exchange transmits the TLDN to the originating exchange in the call setup response message . The originating exchange relays the call to the neighboring exchange using the TLDN, and the neighboring exchange routes the call using the TLDN without paging. According to another embodiment, when an incoming call is generated, the serving exchange, which is an originating exchange, determines whether or not 'ISPAGE' of the neighboring exchange is allowed, transmits an ISPAGE command to the neighboring exchange when ISPAGE is granted, And registers the destination terminal with a paging response and allocates routing information (TLDN) to the serving exchange. The originating exchange relays the call to the neighboring exchange using the TLDN, and the neighboring exchange routes the call using the TLDN without paging. According to yet another embodiment, in response to a call setup request from an originating exchange, the serving exchange, which is a destination exchange, determines whether or not the neighboring exchange paging is allowed (ISPAGE), and when an ISPAGE is granted, And the neighboring exchange performs paging, registers the location of the called terminal in the paging response, allocates the routing information (TLDN) to the serving exchange, and the serving exchange transmits the TLDN to the SETUP response message To the exchange. A neighboring exchange that is an originating exchange routes the call without paging using TLDN.

According to the present invention, there is an advantage in that the efficiency of trunk line resources can be enhanced by making it possible to make a direct call using a soft switching center without using a relay facility in the mobile communication network and a soft exchange period.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of an exemplary mobile communication network in which the present invention can be implemented. Fig.

A mobile terminal (MS) 10 may be a mobile terminal (PDA), a handheld PC, a notebook, a cellular phone, or a PCS (Personal Communication Service) A mobile phone including a next generation mobile communication terminal such as a communication terminal, an IMT-2000 phone or a CDMA-2000 phone, uses a forward channel for call reception and a reverse channel for outgoing call, , Especially when the caller tries to make a telephone call (when making a call), voice communication with the calling terminal is possible through the mobile communication network. The calling terminal can be a general PC, a wired / wireless telephone, a mobile phone (MS), etc., and a voice communication is made with the called mobile terminal 10 through the mobile communication network. Of course, when the calling terminal is a general PC, a wired or wireless telephone, etc., the user accesses the mobile communication network through a public switched telephone network (PSTN).

In general, the mobile communication network includes a base station (BTS) 20, a control station (BSC) 30, an exchange (MSC) 40, a visitor location register (VLR) 50, a home location register (HLR) , A soft exchanger (Soft-MSC) 70, and the like.

The base station 20 connects the mobile terminal 10 to the control station 30 and includes a digital channel unit (DCU), a time / frequency control unit (TCU) Radio Frequency Unit (RFU) and Global Positioning System (GPS). In addition, the base station 20 communicates with the originating mobile terminal 10 via radio, and performs a wired / wireless conversion function to perform wire communication with the control station 30.

The control station 30 connects the base station 20 to the exchange 40 or the soft exchange 70 to adjust the connection between the base stations 20 and to establish a connection between the base station 20 and the exchange 40 / Lt; RTI ID = 0.0 > communication < / RTI >

The exchanger 40 / soft exchanger 70 has a visitor location register 50 and operates with the home location register 60 to process the mobile communication subscriber call. The exchange 40 / soft switch 70 connects with the control station 30 to perform call setup and release functions of the mobile terminal 10 and perform various functions related to call processing and supplementary services.

The visitor location register 50 is a database for temporarily storing subscriber information related to the mobile terminal 10 while the mobile terminal 10 is in an area controlled by the visitor location register 50, The information of the called mobile terminal 10 and the subscriber registered in the location is fetched from the home location register 60 and temporarily stored therein and is implemented in the exchange 40 / soft switch 70.

The home location register 60 is connected to the switching center 40 and the soft switching center 70 and manages various types of information of the mobile telephone subscriber. The home location register 60 is connected to various switching centers 40 / Stores persistent information and location information of the calling mobile terminal 10 and the subscriber, and interacts with the visitor location register 50 to support various functions related to call processing and supplementary services. The home location register 60 stores triggering information according to a service used by the subscriber.

2, when the mobile terminal 10 is located at the boundary of the area of two exchanges (for example, the exchange 40 and the soft exchanges 70), the paging method of the mobile terminal 10 is the same as that of the calling subscriber (E.g., exchange 40 as a local exchange) and a neighboring exchange (e.g., soft exchange 70) sharing a border area with the serving exchange 40, Lt; / RTI > Adjacent exchanges may be one or more, depending on local characteristics.

3, the serving exchange (exchange 40) and the adjacent exchange (soft exchange 70) include a call control module 41 (hereinafter, referred to as " call control module ") that performs a series of procedures to configure a call path between a calling subscriber and a called subscriber A paging database 44 in which the control station, the base station information, and the base station information of the neighboring exchange are stored for each PAI; and the paging database 44 for paging the mobile terminal 10 And a paging control module 42 that performs a series of procedures to perform the exchange. The exchanges 40, 70 are interconnected by a home location register 60. [

4 is a flow diagram illustrating the concept of an incoming call procedure in accordance with an embodiment of the present invention.

There are two methods for the MSC to acquire the location information of the called subscriber as follows.

As a first measure (corresponding to the case where the originating exchange and the serving exchange in FIG. 6 are the same), upon receiving the call setup request, the originating exchange MSC uses the originating subscriber information stored in its visitor location register (VLR) Determines whether the MS is a mobile network mobile subscriber by analyzing the called number included in the call setup request, inquires the called subscriber call processing information to the HLR, and then determines whether the called subscriber exists in the MSC . In this case, since the originating exchange MSC and the destination exchange MSC are the same, the serving exchange MSC means the originating exchange MSC.

As a second method (corresponding to the case where the originating exchange and the serving exchange in FIG. 5 and FIG. 7 are different from each other), if the called subscriber is a home network mobile subscriber existing in another mobile switching center (MSC), the called party is analyzed, (HLR), and confirms that the called subscriber is present in the MSC. Thereafter, the called subscriber (HLR) determines whether the called subscriber exists in the MSC, Locate the destination exchange (MSC) after translation of the TLDN number. In this case, the following serving exchange (MSC) becomes the destination exchange (MSC).

Specifically, when a caller attempts to make a telephone call (that is, at the time of making a call), the MSC transmits the location information of the called subscriber to the HLR using a LOCREQ (Location Request) message (401). Then, the HLR checks the status of the caller and the called subscriber. If the normal call processing is possible, the HLR uses a ROUTREQ (Route Request) message to inform the destination exchange through the VLR (402,403) with location information of the called subscriber using the MSC. On the other hand, a destination exchange (serving exchange or a local exchange) MSC allocates a TLDN (Temporary Local Directory Number) including location information of the called subscriber, and then uses a RouterRequest (Route Request) (404,405) to the home location register (HLR) via the visitor location register (VLR). Then, the home location register (HLR) transmits the location information of the called subscriber to the originating exchange (MSC) using a location information response (locreq (Location Request)) message (406). After that, the MSC analyzes the TLDN to determine the location of the destination MSC, and then requests the MSC to set up the call (407). In one embodiment, the call setup request uses an Initial Address Message (IAM), which is one of the ISUP messages.

Upon receipt of the call setup request message from the originating exchange (MSC) (407), the destination exchange (serving exchange or local exchange) requests the called location register (HLR) via the Visitor Location Register (VLR). The serving exchange MSC receives the called party location information from the home location register (HLR) and requests the called party location information to the visitor location register (VLR) when it is confirmed that the called party exists in the MSC. In addition, when the MSC receives the called subscriber information from the visitor location register (VLR), the MSC checks the current state of the called subscriber, and if the called subscriber is idle, the Zone ID (or Cell ID) of the called subscriber (408) whether ISPAGE (IntersystemPage) is present. In one embodiment, the presence of the IP-BTS is determined based on the ISPAGE determination condition. The IP-BTS is installed in the hot spot, the shadow area, and the in-building office, and it is judged whether the Soft-MSC exists or not.

The serving exchange (MSC) determines whether to use the existing paging scheme or the new paging scheme by determining whether or not it is an ISPAGE. For example, if the existence of the IP-BTS is 'FALSE', it means that there is no Soft-MSC in the 2G MSC neighbor (if there is no IP-BTS in the adjacent zone of the zone (Cell) The paging procedure is processed only in the zone (2G MSC), which is registered without transmission (paging procedure of only the serving exchanger is performed through the existing algorithm) (409, 410). At this time, the serving exchange (MSC) informs the originating exchange (MSC) of the result of the 2G MSC paging processing through an address complete message (ACM), which is one of the ISUP messages. If the existence of the IP-BTS is 'TRUE' (when the IP-BTS exists in the adjacent zone of the zone registered in the zone), it means that there is a Soft-MSC in the adjacent 2G MSC. (411) as well as the paging (ISPAGE2) to the neighboring exchange (Soft-MSC) as well as the Zone (2G MSC) 413. At this time, the serving exchange (MSC) informs the originating exchange (MSC) of the result of the 2G MSC paging processing through the ACM message (412) and paging (ISPAGE2) to the neighboring exchange do. That is, an ISPAGE2 message 413 is generated for the number of registered neighbor exchanges.

Here, the paging is also performed for the 2G MSC at the ISPAGE stage in order to process the incoming call when the subscriber located at the neighboring exchange (Soft-MSC) moves back to the 2G MSC immediately before the paging process. (MSC) and the neighboring exchange (Soft-MSC) in consideration of the movement of the subscriber.

In this way, the serving exchange (MSC) requests ISPAGE2 (as many as the number of the registered adjacent exchanges) to the neighboring exchange (MSC) in case of ISPAGE (413). "ISPAGE" is an instruction sent by a serving exchange (a local exchange) to request a neighboring exchange (MSC) to paging a mobile terminal (MS) or to request a paging response from a mobile terminal (MS).

When the neighboring exchange (Soft-MSC) receives ISPAGE2, it performs paging (414). If there is a paging response from the mobile station (MS) (415), authentication and location registration are attempted. When the location registration is completed, the neighboring exchange (Soft-MSC) allocates the TLDN (416), sends the assigned TLDN to the ispage ack and sends it to the serving exchange (MSC) (417). At this time, the incoming process of the neighboring exchange (MSC) is in a waiting state waiting for a call-in from the serving exchange (MSC). Upon receiving the ispage ack message, the serving exchange (MSC) sends the TLDN value to the originating exchange (MSC) via the REDREQ message (418). At this time, the REDREQ value is set to H`80 (ISP Happened) so that the MSC recognizes that it is a REDREQ (RedirectionRequest) message by ISPAGE. The TLDN will be described in more detail below.

Upon receiving the REDREQ message, the originating exchange (MSC) occupies a relay call with the terminating exchange (serving exchange or a local exchange) after translating the TLDN number. When the MSC receives the call setup request message from the MSC, it uses the TLDN to locate the incoming process and connect the call.

Specifically, the MSC transmits a REL (Release Message) message (REL: Release Message) 419 to terminate the ISUP call to the serving exchange (MSC) upon receipt of the REDREQ message 419. The serving exchange (MSC) (420) as an SS7 message (RLC: Release Complete) that the call processing termination is completed with the MSC.

The originating exchange (MSC) transmits the contents (ISUP IAM message) necessary for call processing with the TLDN to the neighboring exchange (Soft-MSC) (421). If the Soft-MSC receives an initial address message (IAM) from the originating exchange (MSC), it attempts AssignReq to the called terminal without paging (because it received a paging response from the called terminal in step 415) (Step 422), and sends an ISUP ACM message to an originating exchange (MSC) (423) to inform that the call setup has been completed normally. The subsequent call processing is the same as the general incoming call processing procedure.

When the location registration of the MSC is completed, the TLDN is allocated to the MSC. When the location registration is completed in the neighboring MSC, the MSC sends an 'ispage ack' message to the serving exchange MSC. At the exchange (Soft-MSC), the incoming process is not terminated, but is put on standby to connect the incoming call from the originating exchange (MSC). That is, after receiving the REDREQ message from the originating exchange MSC, the Soft-MSC allocates the TLDN, which is the call routing information, for the connection to the final incoming relay call connected to the neighboring exchange (Soft-MSC) will be. The TLDN is a key value that is used by the Soft-MSC to find the incoming process, and is assigned on a call-by-call basis. The neighboring exchange (Soft-MSC) will finally connect the call with the incoming process if there is an incoming process for the incoming TLDN.

FIG. 5 is a flow diagram illustrating an incoming call processing procedure in which an originating exchange, a serving exchange, and a neighboring exchange are different according to an embodiment of the present invention. And the second scheme in the process of the MSC acquiring the location information of the called subscriber.

5, it is assumed that the visitor location register (VLR) is provided in the serving exchange (MSC). In the procedure of FIG. 4, the MSC transmits the location information to the home location register (HLR) If the location information of the subscriber is requested (501), the home location register (HLR) checks the state of the calling party and the called subscriber, and if the normal call processing is possible, the called location information request (RTR: ROUTREQ) The mobile switching center MSC requests the location information of the called subscriber directly to the MSC and allocates the TLDN including the location information of the called subscriber to the called MSC, Route Request) message to the home location register (HLR) (503). The steps " 505 " to "521 " are equivalent to the steps " 407 "

6 is a flowchart illustrating an incoming call process procedure in the case where an originating exchange and a serving exchange are the same according to another embodiment of the present invention. The MSC is the first method in the process of acquiring the location information of the called subscriber. That is, the originating exchange (MSC) and the destination exchange (serving exchange) are the same.

When the caller attempts a telephone call (that is, when making a call), the MSC requests the location information of the called subscriber to the HLR using the LOCREQ message (601). The HLR then checks the status of the calling party and the called party and then recognizes that the called party is located in the originating exchange (MSC) and uses the location response (locreq (Location Request) (MSC) 602 of location information of the called subscriber.

The originating exchange confirms the current status of the called subscriber by checking the called subscriber information from the visitor location register (VLR), and if the called subscriber is in the idle state, the ISP exchanges the zone ID of the called subscriber with the ISPAGE (IntersystemPage) (603).

As a result of the ISPAGE determination, if there is no IP-BTS, the originating exchange (serving exchange) regards that there is no Soft-MSC in the adjacent zone of the registered zone (2G MSC) (Paging procedure of only the serving exchanger is performed through the existing algorithm) (604, 605).

As a result of the ISPAGE determination, if there is an IP-BTS, the originating exchange (serving exchange) regards the Soft-MSC in the adjacent Zone of the registered Zone (2G MSC) ) And paging (ISPAGE2) to the neighboring exchange (Soft-MSC) 607 at the same time. At this time, paging (ISPAGE2) to the neighboring exchange (Soft-MSC) is tried for the number of the registered adjacent exchanges.

The neighboring exchange (Soft-MSC) performs paging (608) upon receipt of ISPAGE2. If there is a paging response from the mobile station (MS) (609), authentication and location registration are attempted. When the location registration is completed, the Soft-MSC allocates the TLDN (610), and sends the allocated TLDN to the originating exchange (serving exchange) by putting the allocated TLDN in the "ispage ack" (611).

The originating exchange (serving exchange) transmits the contents (ISUP IAM message) necessary for call processing with the TLDN to the neighboring exchange (Soft-MSC) (612). If the Soft-MSC receives an Initial Address Message (IAM) from the originating exchange (serving exchange), it attempts to AssignReq to the called terminal without paging (613) and sends the ISUP ACM message to the originating exchange (614) to indicate that the call setup was successful. The subsequent call processing is the same as the general incoming call processing procedure.

7 is a flowchart illustrating an incoming call process procedure when an originating exchange and a neighboring exchange are the same according to another embodiment of the present invention.

When the caller attempts a telephone call, the MSC requests the location information of the called subscriber to the home location register (HLR) using the LOCREQ message (701). Then, the HLR checks the state of the calling party and the called subscriber, and if the normal call processing is possible, transmits the position information of the called subscriber to the called MSC using the RTR (ROUTREQ) (702). On the other hand, the destination MSC allocates the TLDN including the location information of the called subscriber, and then transmits the TLDN to the home location register (HLR) using the rtr ack (Route Request) message 703). Then, the home location register (HLR) transmits the location information of the called subscriber to the originating exchange (MSC) using a locreq (Location Request) message (704). The originating exchange (MSC) then analyzes the TLDN to determine the location of the terminating exchange (MSC).

Upon receiving the call setup request message from the originating exchange (MSC) (705), the terminating exchange (serving exchange) requests the called party location information from the home location register (HLR) via the visitor location register (VLR). The serving exchange MSC receives the called party location information from the home location register (HLR) and requests the called party location information to the visitor location register (VLR) when it is confirmed that the called party exists in the MSC. In addition, when the MSC receives the called subscriber information from the visitor location register (VLR), it checks the current state of the called subscriber, and if the called subscriber is in the idle state, (706).

If the IP-BTS does not exist, the serving exchange (MSC) considers that there is no Soft-MSC in the adjacent zone of the registered zone (2G MSC) (Paging procedure of only the serving exchanger is performed through the existing algorithm) (707, 708).

As a result of the ISPAGE determination, if there is an IP-BTS, the serving exchange (MSC) regards the Soft-MSC in the adjacent Zone of the registered Zone (2G MSC) Paging (ISPAGE2) to the adjacent exchange (i.e., the originating exchange) is also handled simultaneously (711). At this time, paging (ISPAGE2) to the adjacent exchange (originating exchange) is tried for the number of the registered adjacent exchanges.

The neighboring exchange (originating exchange) performs paging (712) upon receipt of ISPAGE2. If there is a paging response from the mobile station (MS) (713), authentication and location registration are attempted. Upon completion of the location registration, the neighboring exchange (originating exchange) allocates the TLDN (714), sends the assigned TLDN to the ispage ack and sends it to the serving exchange (MSC) (715).

When the serving exchange (MSC) receives the ispage ack message from the neighboring exchange (originating exchange), it transmits the TLDN value to the originating exchange through the REDREQ message (716).

Upon receiving the REDREQ message, the originating exchange transmits a REL message (717) to terminate the ISUP call to the serving exchange (MSC) (717), and the serving exchange (MSC) informs the originating exchange via the RLC message (718).

Since the originating exchange is the same as the neighboring exchange, it does not need to perform the call connection procedure (ISUP IAM, ISUP-ACM message) between the originating exchange and the neighboring exchange without any paging (since the paging response is received from the terminating terminal in step 713) AssignReq to the called terminal (719). The subsequent call processing is the same as the general incoming call processing procedure.

Although the present invention has been described in connection with some embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as understood by those skilled in the art. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of an exemplary mobile communication network in which the present invention can be implemented; Fig.

FIG. 2 is a conceptual diagram showing a regional classification related to paging of a mobile communication network. FIG.

Fig. 3 is a view showing the configuration of the exchanger and the soft exchanger of Fig. 1; Fig.

4 is a flow diagram generally illustrating an incoming call procedure in accordance with an embodiment of the present invention.

5 is a flow diagram illustrating an incoming call processing procedure in which an originating exchange, a serving exchange, and a neighboring exchange are different according to an embodiment of the present invention;

6 is a flow diagram illustrating an incoming call process procedure when an originating exchange and a serving exchange are the same according to another embodiment of the present invention;

7 is a flowchart illustrating an incoming call process procedure when an originating exchange and a neighboring exchange are the same according to another embodiment of the present invention;

DESCRIPTION OF THE REFERENCE NUMERALS

10: mobile terminal (MS) 20: base station (BTS)

30: control station (BSC) 40: exchange (MSC)

50: Visitor Location Register (VLR) 60: Home Location Register (HLR)

70: Soft exchanger (Soft-MSC)

Claims (13)

A method of processing an incoming call in a mobile communication system, a) Upon occurrence of an incoming call, the serving exchange, which is the called exchange, determines whether or not the paging of the adjacent exchange is allowed (hereinafter referred to as ISPAGE) according to the call setup request from the originating exchange. Attempting paging in its own area, in addition to transmitting; b) performing the paging by the neighboring exchange, registering the location of the called terminal in the paging response, allocating the routing information (TLDN), and transmitting to the serving exchange; c) the serving exchange puts the TLDN in a call setup response message and sends it to the originating exchange; d) the originating exchange relays the incoming call to the neighboring exchange using the TLDN; And and e) the neighboring exchange routes the incoming call without paging using the TLDN. A method of processing an incoming call in a mobile communication system, a) Upon occurrence of an incoming call, the serving exchange, which is an originating exchange, judges whether or not the paging of the adjacent exchange is allowed (hereinafter referred to as ISPAGE), and transmits an ISPAGE command to the neighboring exchange when the ISPAGE is granted. Attempting paging; b) performing the paging by the neighboring exchange, registering the location of the called terminal in the paging response, allocating the routing information (TLDN), and transmitting to the serving exchange; c) the originating exchange relays the incoming call to the neighboring exchange using the TLDN; And and d) the neighboring exchange routes the incoming call without paging using the TLDN. A method of processing an incoming call in a mobile communication system, a) In response to a call setup request from an originating exchange, a serving exchange that is a destination exchange determines whether or not paging of a neighboring exchange is permitted (hereinafter referred to as ISPAGE), and when an ISPAGE is granted, Sending an ISPAGE command to the mobile station, attempting paging in its own area; b) performing the paging by the neighboring exchange, registering the location of the called terminal in the paging response, allocating the routing information (TLDN), and transmitting to the serving exchange; c) the serving exchange puts the TLDN in a call setup response message and sends it to the originating exchange; And and d) the neighboring exchange being the originating exchange routes the incoming call without paging using the TLDN. delete 4. The method according to any one of claims 1 to 3, Further comprising: attempting to paging within its area according to a known procedure when the serving exchange is not ISPAGE-denied. 4. The method according to any one of claims 1 to 3, And in the step b), when the serving exchange transmits the ISPAGE command to the neighboring exchange, the ISPAGE command is transmitted by the number of the adjacent exchanges. 4. The method according to any one of claims 1 to 3, Wherein the neighboring exchange is a Soft-MSC. A mobile communication system for processing an incoming call, An originating exchange for generating a call setup request signal when an incoming call is generated; (Hereinafter referred to as "ISPAGE") according to the call setup request, and transmits an ISPAGE command to the neighboring exchange at the time of ISPAGE permission, Exchanger; And And a neighboring exchange for performing paging according to the ISPAGE command, registering a location of the called terminal in a paging response, allocating routing information (TLDN), and transmitting the location information to the called service switching center, Wherein the terminating serving exchange places the TLDN in a call setup response message and sends the TLDN to the originating exchange, the originating exchange relays the incoming call to the neighboring exchange using the TLDN, and the neighboring exchange uses the TLDN And routing the incoming call without paging. A mobile communication system for processing an incoming call, An originating service switching agent for determining whether or not 'paging of a neighboring exchange is allowed' (hereinafter referred to as ISPAGE) when an incoming call is generated, sending an ISPAGE command to the neighboring exchange when ISPAGE is granted, And And a neighboring exchange for performing paging according to the ISPAGE command and registering a location of the called terminal in a paging response and allocating routing information (TLDN) to the calling serving exchange, The originating serving exchange relays the incoming call to the neighboring exchange using the TLDN, and the neighboring exchange routes the incoming call without paging using the TLDN. A method of processing an incoming call in a mobile communication system, An originating exchange for generating a call setup request signal when an incoming call is generated; And Determines whether or not paging of a neighboring exchange is permitted (hereinafter referred to as ISPAGE) according to the call setup request, transmits an ISPAGE command to the originating exchange, which is the neighboring exchange, when ISPAGE is granted, An attempted incoming service switching center, The originating exchange performs paging to allocate routing information (TLDN) to the called terminal, registers the location of the called terminal in a paging response, and transmits the TLDN to the called service switching center. The called service switching center loads the TLDN into a call setup response message, And the originating exchange routes the incoming call without paging using the TLDN. 11. The method according to any one of claims 8 to 10, Wherein the neighboring exchange is a Soft-MSC. 11. The method according to any one of claims 8 to 10, And transmits the ISPAGE command for the number of adjacent exchanges when transmitting the ISPAGE command to the adjacent exchange. delete

Images