KR20020048506A - The CAMEL Mechanism For Support Of VHE Services - Google Patents

Abstract

PURPOSE: A VHE(Virtual Home Environment) service method using CAMEL(Customized Application for Mobile network Enhanced Logic) is provided to offer the same service within home to IMT-2000 subscribers network when roaming to the outside of a home network. CONSTITUTION: A serving network consists of an ISC(IMT-2000 Mobile Switching Controller,200). An MSC(Mobile Switching Control,210) controls a call control function and a location register function. A VLR(Visitor Location Register,220) and an SSP(Service Switching Processor,230) manage the visitor information. The MSC(210) consists of an MCCB(Mobile Call Control Block,212) for processing bearer setting/canceling for controlling an IMT-2000 call. An LUB(Location Update Block,211) processes the location register of the mobile terminal. An HLR(Home Location Register,310) consists of a CHMB(Camel-Home Subscriber Information Management Block,312) for managing CSI(CAMELL Subscription Information) data. A PPBhm(Protocol Processing Block-HLR MAP,311) processes a MAP protocol to the interaction interface of VLR/SSP.

Description

How to provide JHE service using CAMEL {The CAMEL Mechanism For Support Of VHE Services}

The present invention relates to providing an IMT-2000 service. More specifically, the present invention provides a customized application for mobile network enhanced logic (CAMEL) technique to provide an IMT-2000 service subscriber with the same service as a home network when roaming out of the home network area. The present invention relates to a system and a method for providing a virtual home environment (VHE) to a subscriber.

The IMT-2000 system is a mobile communication system that provides the same functions as the existing mobile phone service such as PCS, and roams with mobile phone networks around the world, and should provide a wide range of communication services to mobile or fixed users. Regardless, it should be possible to provide services of the same quality as fixed network services for mobile terminals.

In the conventional mobile communication network, the mobility of the terminal is provided so that the terminal can access the communication service anywhere, and the personal mobility is provided so that the subscriber can access the communication service registered in the service profile from any terminal. However, service mobility was not provided, so the service could not be provided to other subscribers in the same way as in the home network. In other words, there was an inconvenience in that the service should be provided in various ways defined by service providers in visits of other operators.

Korean Patent Registration No. 10-0249834 (Invention: "Method of Providing User Location Information for Personal Mobility"), which is the patent holder of Korea Telecom Corp., provides a personal mobility service in a personal mobile communication system. A procedure for providing location information of a terminal according to provision of personal mobility service is disclosed.

Unlike the personal mobility service providing method disclosed in the above patent, IMT-2000 is adopted by the subscriber as a method for providing service mobility where the subscriber can receive the service registered in the home network in the same way regardless of the location of the terminal. A representative technique is VHE. Subscribers can continue to receive services in the visited network with the same conditions as those received in the home network through the VHE (eg, service type, transmission capability, source coding, etc.).

In his paper, Virtual Home Environment Technology, presented at the 99 IMT-2000 Exchange and Network Technology Workshop, October 21-22, 1998, a paper on providing VHE that provides IMT-2000 service mobility The VHE definition / requirements / structure is shown as the information, and the structure / information / scenario / information flow of CAMEL is described as the mechanism used to realize this, and the definition / requirement of the mobile equipment execution environment Describe the relationship between the user profile and the mobile terminal and the definition of the SIM Application Tool Kit (SAT). However, there is no comment on the specific method of actually implementing the VHE.

The present invention has been made to solve the above problems, and an object thereof is to provide a VHE service providing method for providing service mobility to an IMT-2000 subscriber using a CAMEL technique.

1 is a block diagram of hardware to which the present invention is applied;

2A is a flowchart of subscriber information processing using CAMEL according to the present invention;

2b is a location registration flowchart of a terminal using a CAMEL according to the present invention; And

2C is a flowchart of a signal processing using a CAMEL according to the present invention.

According to a preferred embodiment of the present invention, in an IMT-2000 system capable of providing a VHE service providing service mobility to an IMT-2000 subscriber using a CAMEL technique, requesting or requesting subscriber information through an exchange of MAP messages with an HLR An SCP that acquires and performs CAMEL logic control through an exchange of CAP messages with an SSP to deliver a CAMEL service requested by the subscriber to the SSP; HLR for processing CAMEL-related data through MAP message exchange with SCP and VLR to perform subscriber location registration, deletion or change procedure; A VLR collecting and managing the subscriber location information through an MSC; And an SSP for transmitting subscriber information or a CAMEL request received from the MSC through a message exchange with the VLR or the SCP.

In addition, according to another embodiment of the present invention, there is provided a method for providing a virtual home environment (VHE) service that can provide service mobility to an IMT-2000 subscriber registered in a home network. A first step of performing a subscriber information processing for requesting subscriber information and receiving subscriber information from the HLR by the SCP of the network through MAP message exchange with the HLR; Wherein the HLR performs a subscriber location registration procedure such as adding, deleting, and changing the subscriber location information through MAP message exchange with the VLR and the previous VLR based on the subscriber location information received from the MSC by the VLR of the serving network; 2 courses; And a third process of performing, by the SCP, a subscriber calling signal providing the CAMEL service requested by the subscriber according to the CAMEL originating service logic received through the CAP message from the SSP of the serving network.

Reference will now be made in detail to the preferred embodiments of the present invention with reference to the accompanying drawings.

First, referring to FIG. 1, an example of a hardware configuration diagram of an IMT-2000 system to which the present invention is applied is shown. The system is largely composed of a home network and a serving network.

The serving network is composed of an IMT-2000 switch (IMT-2000 Mobile Switching Controller) of the serving network (hereinafter referred to as 'ISC') 200, wherein the ISC 200 controls a call control function and a location registration function. Mobile Switching Control (hereinafter referred to as "MSC") 210, a serving visitor information processor (Visitor Location Register (hereinafter referred to as "VLR") 220 that manages visitor subscriber information and serving service switching processor ( Service Switching Processor (hereinafter referred to as 'SSP') 230 is included.

The MSC 210 registers a Mobile Call Control Block (hereinafter referred to as 'MCCB') 212 that handles bearer setup / release for IMT-2000 call control and location registration that processes location registration of the mobile terminal. It is composed of a block (Location Update Block) (hereinafter referred to as "LUB") (211).

The VLR 220 is a Camel-Visitor Subscriber Information Management Block (hereinafter referred to as 'CVMB') 222 that processes, stores, adds, deletes, and changes information related to a visited subscriber. It has a protocol processing block (hereinafter referred to as PPBvm) 41 for processing Mobile Application Protocol (hereinafter referred to as 'MAP') on the HLR and the mutual interface.

The SSP 230 is a Camel DP Control Block (hereinafter referred to as CDCB) 232 for processing intelligent call detection points of a serving network, and a CAMEL application protocol (hereinafter referred to as CAP) on an interface with SCP. And a Protocol Processing Block (SSP CAP; hereinafter referred to as PPBsc) 231.

In addition, the home location register (HLR) 310 of the home network provides a service profile for the IMT-2000 subscriber and an outgoing / incoming / dial-out / additional service / short message service / packet service / mobility management. / Etc-CAMEL Subscription Information (hereinafter referred to as CSI) Camel-Home Subscriber Information Management Block (hereinafter referred to as CHMB) 312, MAP to the mutual interface with the VLR / SSP A protocol processing block (Protocol Processing Block-HLR MAP; hereinafter referred to as PPBhm) 311 for processing a protocol.

On the other hand, the home network service control processor (Service Control Processor) 320 is a service logic processing block for controlling the IMT-2000 service logic of the home network (hereinafter referred to as CHLB) (323), HLR and Protocol Processing Block (SCP MAP; hereinafter referred to as PPBcm) 321 for processing the MAP protocol on the mutual interface and Protocol Processing Block (SCP CAP) for processing the CAP protocol on the mutual interface with the SSP; PPBcc) (322).

2 is a flowchart for processing a VHE service according to the present invention, FIG. 2A is a flowchart of subscriber information processing, FIG. 2B is a subscriber location registration processing flowchart, and FIG. 2C is a subscriber CAMEL call signal processing flowchart. That is, the subscriber information processing procedure for providing service mobility is shown in FIG. 2A, the location registration procedure of the mobile station is shown in FIG. 2B, and the CAMEL call signal providing procedure requested by the mobile station is shown in FIG. 2C.

First, a subscriber information processing procedure will be described with reference to FIG. 2A.

The CHLB 323 of the home SCP 320 is the required information element in the "query subscriber reservation information" message to the home HLR 310 at any time if necessary, the SCP address to be queried, and the required supplementary service related / prohibited by the operator. CAMEL reservation information / CAMEL phase information provided by the VLR is displayed, and the subscriber identifier information is carried on the PPBcm (flow 1).

PPBcm 321 of SCP 320 receives this, converts it to MAP protocol message type, and forwards the message to PPBhm 311 of HLR 310 (flow 2). The PPBhm 311 of the home HLR 310 receives it and sends the contents requested by the CHLB 323 of the SCP 320 to the CHMB 312 (flow 3).

The CHLB 312 of the home HLR 310 receives it and conditionally suppresses call transfer supplementary service data / call addition service data / operator decision by the content of information requested by the CHLB 323 of the home SCP 320. The message " subscriber reservation information query response " that includes information such as data / CAMEL reservation information and CAMLE phase provided by the VLR is transmitted to the PPBhm 311 (flow 4). PPBhm 311 of HLR 310 converts it to MAP protocol message type and forwards it to PPBcm 321 of SCP 320 (flow 5).

PPBcm 321 of SCP 320 receives it and forwards the received information to CHLB 323 (flow 6). The received CHLB 323 stores the received information in the subscriber data to use the service logic of the subscriber (flow 7). In this way, SCP 320 frequently requests and stores necessary subscriber information from HLR 310.

Next, the location registration processing procedure of the mobile terminal will be described with reference to FIG. 2B.

When the terminal moves to a serving network by moving its location, the LUB 211 receives a "subscriber location registration request" message requesting the location registration of the terminal. The LUB 211 receives the received location information of the terminal in the message " subscriber location registration request " to the CVMB 222 (flow 1). The CVMB 222 receiving this information examines the visitor's information and transmits a "subscriber location change request" message containing the location information of the visited network to change the subscriber location information of the home HLR 310 if the visitor is a new visitor. (Flow 2). The PPBvm 221 which receives this is converted into a MAP protocol message and transmitted to the PPBhm 311 of the HLR 310 (flow 3).

The PPBhm 311 of the HLR 310 forwards the received information to the CHMB 312 (flow 4). The CHMB 312 receiving this information examines the location information of the subscriber (flow 5), and the " request to delete subscriber location information " is implemented to cancel the CAMEL reservation information or the special CAMEL reservation information cancellation information to the currently registered VLR 229. Forward the message to PPBhm 311 (flow 6). This is converted from the PPBhm 311 to the MAP protocol message type and forwarded to the prePPBvm of the previous VLR 220 (flow 7).

The prePPBvm of the previous VLR forwards the received information to the preCVMB of the previous VLR (flow 8). Upon receiving this, preCVMB deletes the received CAMEL related information and subscriber location information (flow 9). Subsequently, as a result of this processing, the message " subscriber location information deletion notification " The received prePPBvm converts the MAP protocol message type to the PPBhm 311 of the HLR 310 (flow 11).

Then, the PPBhm 311 of the HLR 310 transmits the received information to the CHMB 312 of the HLR 310 (flow 12). CHMB 312 receiving this confirms that the requested deletion of the subscriber information has been processed normally, and the serving network VLR 220 requesting the location registration of the terminal SCP-address, service key, mobility to the mobile-CSI which is an essential information element The message " Add subscriber information request ", which carries the information of the management trigger, is delivered to PPBhm 311 (flow 13). The PPBhm 311 which receives this is converted into a MAP protocol message type and transmitted to the PPBvm 221 of the serving network VLR 220 (flow 14).

The PPBvm 221 of the serving network VLR 220 forwards the received information to the CVMB 222 (flow 15). The received CVMB 222 adds the received information to the subscriber's location information data and the CAMEL information data (flow 16), and transfers the processed result to the "subscriber information addition notification" message to the PPBvm 221 ( Flow 17). The PPBvm 221 which receives this is converted into a MAP message protocol and transmitted to the PPBhm 311 of the HLR 310 (flow 18).

Next, the PPBhm 311 of the HLR 310 transmits the received information to the CHMB 312 (flow 19). If the CHMB 312 examines the contents of the received information and successfully adds the subscriber's location information, the CHMB 312 changes the subscriber location information of the home HLR 310 to the VLR 220 of the current serving network. (Flow 20), the PPBhm 311 carries the message of the subscriber's location change success in the "subscriber location change notification" message (flow 21). The PPBhm 311 which receives this is converted into a MAP protocol message type and transmitted to the PPBvm 221 of the serving network VLR 220 (flow 22).

The PPBvm 221 of the serving network which receives this transmits the received information to the CVMB 222 (flow 23). Receiving this, the CVMB 222 recognizes that the subscriber's location change processing has been successfully completed and transmits a "subscriber location registration complete" message to the LUB 211 of the MSC 210 (flow 24). The LUB 211 of the MSC 210 receives this, recognizes that the subscriber location registration process is normally completed, transmits the result to the terminal, and terminates the subscriber location registration procedure (flow 25).

Next, the subscriber CAMEL call signal processing procedure will be described with reference to FIG. 2C.

If the terminal requests a call after the procedure in FIG. 2b, the MCCB 212 of the MSC 210 receives the call and confirms that the terminal is available (flow 1), and sends / dials the calling subscriber. The CSI and the network-CSI information are delivered to the CVMB 222 message "caller information request" which implements necessary information elements (flow 2).

Then, the CVMB 222 receiving the message receives the caller reference number and the gateway mobile network address provided by the HLR 310 as essential information elements, and the " caller information request response implementing the requested source-CSI or dialed-CSI. Forward the message to MCCB 212 (flow 3).

Receiving this, the MCCB 212, upon recognizing that the CAMEL call signal processing is possible, mounts the information of the calling subscriber to the CDCB 232 and transmits a "CAMEL call start request" message (flow 4).

Upon receiving this, the CDCB 232 transmits a "CAMEL originating service logic request" message to the PPBsc 231 to request CSI service logic to the received SCP 320 address (flow 5). ) Converts the information into a CAP protocol message type and passes it to PPBcc 322 of the home SCP 320 (flow 6).

The PPBcc 322 of the home SCP 320 receiving the message transmits the received information to the CHLB 323 (flow 7). The CHLB 323 receiving the call drives outgoing or dialed CAMEL call processing service logic requested by the CDCB 232 of the serving network (flow 8), and provides the service requested by the subscriber using the service logic of the home network. do.

As described so far, provision of service mobility using a different CAMEL technique in a suitable embodiment of the present invention includes a mobile terminal, a serving MSC 210, a serving VLR 220, a serving SSP 200, a home HLR 310, It consists of the home SCP (320), the interface protocol between the home HLR (310) and the serving VLR (220) MAP (Mobile Application Protocol), the interface protocol between the home SCP (320) and the serving SSP (230) CAP (CAMEL Application) Protocol), the MAP for the interface protocol between the home HLR 310 and the home SCP 320, and processes the information using an internal protocol between the serving MSC 210 and the serving SSP (230).

According to the VHE service providing method using the CAMEL according to the present invention described above, by using the CAMEL technique between the home network and the serving network, which is the typical service of the IMT-2000, the terminal always uses the service logic of the home network in the visit Therefore, the desired service can always be provided in the same way.

In addition, as a service providing field of mobile communication, by providing a service mobility that cannot be provided by the existing mobile communication service by using the CAMEL technique that adds mobility to the concept of an intelligent network, a subscriber provided with the method according to the present invention can be used anytime, anywhere. The desired service can always be provided in the same way.

Accordingly, convenience is provided to the subscribers by providing advanced service mobility to the IMT-2000 subscribers, and the subscribers can receive the desired service anytime and anywhere using the same service regardless of the location of the terminal.

The description so far is directed to the preferred embodiments for understanding the invention, and the invention is not limited thereto, and is intended to those skilled in the art without departing from the scope and spirit of the appended claims. It is obvious that various modifications and variations are possible.

Claims (2)

In the IMT-2000 system that can provide a VHE service that provides service mobility to the IMT-2000 subscriber using the CAMEL technique, An SCP requesting or acquiring subscriber information through HAP and MAP message exchange, and performing CAMEL logic control through SSP and CAP message exchange to deliver the CAMEL service requested by the subscriber to the SSP; HLR for processing CAMEL-related data through MAP message exchange with SCP and VLR to perform subscriber location registration, deletion or change procedure; A VLR collecting and managing the subscriber location information through an MSC; And And an SSP for delivering subscriber information or CAMEL request received from the MSC through message exchange with the VLR or SCP. A method of providing a virtual home environment (VHE) service that can provide service mobility to an IMT-2000 subscriber registered in a home network, A first step of the SCP of the home network performing subscriber information processing requesting subscriber information and receiving subscriber information from the HLR through MAP message exchange with the HLR; The HLR performs a subscriber location registration procedure such as adding, deleting and changing the subscriber location information through MAP message exchange with the VLR and the previous VLR based on the subscriber location information received from the MSC by the VLR of the serving network. 2 courses; And And a third step of performing, by the SCP, a subscriber calling signal providing the CAMEL service requested by the subscriber according to the CAMEL originating service logic received through the CAP message from the SSP of the serving network. .