KR100896844B1 - Server device for roaming packet data service, system and method - Google Patents

Abstract

The present invention relates to a server apparatus, a system, and a method for a roaming packet data service. The present invention provides packet data quality of service by collecting authentication information and charging information related to a packet data service protocol when providing a roaming packet data service. It can monitor in real time, and can monitor the usage and quality of packet data service by service provider in real time, and can generate an alarm when the packet transmission rate of a specific service provider falls below a certain threshold to identify the service provider and quality status. There is an advantage to this.

Roaming, packet data, authentication, billing, packet rate

Description

Server apparatus, system and method for roaming packet data service {SERVER DEVICE FOR ROAMING PACKET DATA SERVICE, SYSTEM AND METHOD}

The present invention relates to a packet data service of a mobile communication system, and more particularly, to a server apparatus for providing a packet data service through roaming between separate mobile communication networks, a system using the same, and a service method thereof. .

As computers, electronics, and communication technologies have made rapid progress, wireless communication systems using wireless networks have been developed to provide various wireless communication services. A wireless communication system is a system developed for a case where a fixed wired network cannot be connected to a terminal and used. Representative systems of such a wireless communication system include a mobile communication system, a wireless LAN, Wibro, a mobile ad hoc, and the like.

The mobile communication system is intended to enable a call while the subscriber is moving at a high speed over a large area. A representative system of such a mobile communication system is a cellular system. The cellular system is a concept proposed to overcome the limitations of the service area and the subscriber capacity of the conventional mobile communication system. The cellular system is divided into several small areas, that is, cells that are far enough apart from each other. By using the same frequency band, spatial reuse of frequency.

The most basic mobile communication service provided by such a mobile communication system is a wireless voice call service that provides a voice call to a mobile terminal user wirelessly, which can provide a service regardless of time and place. In addition, while supplementing voice call service by providing a text message service, recently, a wireless Internet service for providing an Internet communication service through a wireless communication network to a user of a mobile communication terminal has been provided.

Therefore, the subscribers of the mobile communication service can freely move and talk with the other party anytime and anywhere by using the wireless communication service, and through the wireless Internet service, various information necessary for life, for example, news, weather, sports, securities, Exchange rates or traffic information may be provided in various forms such as text, voice, or image.

As a result of the development of mobile communication technology, the services provided by a code division multiple access (CDMA) mobile communication system are not only voice services but also circuit data, packet data, and the like. It is evolving into a multimedia communication service that transmits the same data.

Recently, the third generation mobile communication system, IMT-2000 (International Mobile Telecommunication 2000) (eg, CDMA2000 1X, 3X, EV-DO, WCDMA, etc.) is commercially available. Recently, the IS-95C network, which has evolved from the existing IS-95A and IS-95B networks, transmits up to 307.2 Kbps, which is much faster than the 14.4 Kbps or 56 Kbps data rate that can be supported in the IS-95A and IS-95B networks. It offers wireless internet at speed. In particular, by using IMT-2000 service, it is possible to provide various multimedia services (AOD, VOD, etc.) at higher speed as well as improving existing voice and WAP service quality.

In the WCDMA system, the wireless access technology uses the CDMA method, but the mobile communication network technology is based on the GSM network technology. The WCDMA communication method adopts Adaptive Multi-Rate Vocoder (AMR), which has a transmission rate of 4.75 kbps to 12.2 kbps for voice coding, and supports high mobility enough to make a call even if the user moves at a speed of about 100 km per hour. . In addition, since the frequency bandwidth is widened to 5 MHz and has a data transmission speed of 2 Mbps, it is suitable for high-speed data transmission, and diversity according to reverse call quality that cannot be provided by the IS-95 and GSM methods. Provides good call and data transmission performance even in poor communication environments.

Since the mobile communication technology is generally implemented in a different way in each country, when a mobile terminal user of a country moves to a mobile communication service using a different country or a different communication technology, it has to receive a service called roaming.

Roaming means using a mobile phone outside the subscriber's mobile network in a land mobile phone service. In other words, several mobile phone operators have agreed to each other so that they can move from the service area of the registered carrier to the service area of another service provider in the wireless network without interruption of service or disconnection.

Using such a roaming service, it is possible to use a packet data service as well as a voice call even when leaving the mobile communication network of the subscriber.

In many countries around the world, there are many mobile operators, each with their own service network. Therefore, depending on each service provider, there may be areas where the service is not well performed.

However, the packet data service is different from a voice call and its quality management standards are different from those of a voice call. Therefore, the packet data service cannot be managed by a MAP (Mobile Application Part) message or call detail record (CDR) information. There is a problem in the technology that can not monitor the quality of the packet data service.

The present invention collects authentication information and accounting information related to a packet data service protocol when providing a roaming packet data service so that the quality of packet data service can be monitored.

A server apparatus for roaming packet data service as a first aspect of the present invention is a server apparatus for providing a packet data service through roaming between separate mobile communication networks, and provides packet data when providing a packet data service through roaming. Collecting at least one of the service protocol-related authentication information and billing information to provide the quality statistics information of the packet data service for each mobile communication network.

As a second aspect of the present invention, a system for roaming packet data service is a system for providing a packet data service as a visited network through roaming to a mobile communication terminal subscribed to a home network, thereby ensuring mobility of the mobile communication terminal. A wireless network for processing a radio link and a radio signal according to a wireless access standard, serving means for performing an IP address allocation and routing function for the mobile communication terminal connected to the wireless network, and the movement through the serving means. When providing a packet data service through the roaming while in charge of authentication and charging for a wireless data service of a communication terminal, at least one of packet authentication information and packet information related to a packet data service protocol is collected and the packet data for each mobile communication network. Provide quality statistics information of the service The disclosure shall include a certified billing means.

A method for roaming packet data service as a third aspect of the present invention is a method for providing a packet data service in a visited network through roaming for a mobile communication terminal subscribed to a home network, wherein the mobile communication terminal is provided with the visited network. Transmitting a network access identifier (Network Access Identifier) to the roaming service, receiving the network identifier, and authenticating whether the mobile communication terminal is subscribed to a roaming service; Providing a roaming packet data service through the connection with the home network, when the visited network provides the roaming packet data service, when the visited network provides the roaming packet data service; which Collecting one piece of information and providing quality statistical information of the packet data service for each mobile communication network.

As a fourth aspect of the present invention, a system for roaming packet data service is a system for providing a packet data service as a visited network through roaming to a mobile communication terminal subscribed to a home network. Statistics to generate statistics by collecting at least one information from the authentication data and the authentication information related to the packet data service protocol and the information collected by the AAA server according to the statistics period when providing A quality management server which collects the statistics generated by the statistics generating server, generates quality statistics information for each network, and processes the quality statistics information generated by the quality management server to generate monitoring screen data, and then generates quality statistics. Monitoring device that outputs the monitoring screen It includes.

A method for roaming packet data service as a fifth aspect of the present invention is a method for providing a packet data service in a visited network through roaming to a mobile communication terminal subscribed to a home network. Collecting at least one of the packet data service protocol related authentication information and billing information, generating the statistics by collecting the collected information according to a statistical period, and collecting the generated statistics. Generating quality statistics information for each network; and generating the monitoring screen data by processing the generated quality statistics information and outputting the quality statistics monitoring screen.

In the present invention, when providing a roaming packet data service, the packet data service quality can be monitored in real time by collecting authentication information and accounting information related to the packet data service protocol and providing the statistical information.

In addition, the usage and quality of the packet data service can be monitored in real time for each service provider, and an alarm is generated when the packet transmission rate of a specific service provider falls below a certain threshold to identify the service provider and quality status.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a block diagram of a mobile communication system for providing a roaming packet data service according to an embodiment of the present invention.

In FIG. 1, the home network 300 refers to a network to which the first mobile communication terminal 110 is subscribed, and the visited network 100 newly moves to the mobile communication terminal 110. It means the network connected after roaming.

First, the visited network 100 will be described.

The mobile communication terminal 110 is a terminal for receiving a voice call service and a packet data service through the wireless network 120. To this end, the mobile communication terminal 110 uses a wireless application protocol (WAP), which is a wireless Internet access protocol (WAP), to access various content servers using the wireless network 120, and MIE based on HTML using an HTTP protocol. (Microsoft Internet Explorer), Handheld Device Transport Protocol (HDPT), i-Mode of NTT DoKoMo or "NATE" of SK Telecom. In addition, the mobile communication terminal 110 may include a personal digital assistant (PDA), a cellular phone, a personal communication service (PCS) phone, a hand-held PC, a global system for mobile (GSM) phone, and a W-CDMA ( A wideband CDMA phone, a CDMA-2000 phone, and a Mobile Broad and System (MBS) phone may be used.

The wireless network 120 serves to guarantee the mobility of the mobile communication terminal 110, and defines a signaling procedure for handling the origination and reception of a packet call, a packet forwarding procedure, a medium access control (MAC), and the like. It includes a base station for processing a radio link and a radio signal, and a base station controller for processing a call processing and selection function and a radio link protocol, and supports both synchronous and asynchronous operations. In this case, the base station is a base transceiver station (BTS), the base station controller is a base station controller (BSC), and in the asynchronous case, the base station is a node B, and the base station controller is a radio network controller (RNC). do. Of course, the wireless network 120 is not limited thereto, and includes an access network of all mobile communication systems to be implemented in the future, including a CDMA network, a non-W-CDMA network, an HSDPA network, a GSM network, and a fourth generation.

The wireless network 120 is connected to a Packet Data Serving Node (PDSN) 130 that is responsible for authentication, IP address assignment, and routing functions for the mobile communication terminal 110.

The PDSN 130 is connected to an authentication authorization accounting server (hereinafter referred to as an "AAA server") that is responsible for authentication and authorization of the wireless data service of the mobile communication terminal 110.

When providing the roaming packet data service, the AAA server 140 collects packet data service protocol related authentication information and billing information to generate statistical information, and is connected to the home network 300 through the Internet 200.

Next, the home network 300 will be described.

Like the AAA server 140 of the visited network 100, the AAA server 310 is responsible for authentication, authority, and charging of the wireless data service of the mobile communication terminal located in the service area of the home network 300. In addition to the AAA server 30, various devices and servers are located in the home network 300, but the description thereof is omitted.

2 is a diagram illustrating a detailed configuration of an AAA server in a mobile communication system for providing a roaming packet data service according to an embodiment of the present invention.

When providing the roaming packet data service by the PDSN 130, the AAA server 140 collects the authentication information collection unit 141 which collects authentication information related to the packet data service protocol, and the roaming packet data service by the PDSN 130. A billing information collection unit 143 for collecting billing information related to the packet data service protocol and a monitoring screen data generating unit 145 for processing the collected authentication information and billing information into statistical information to generate monitoring screen data; Include. Although not shown in the drawing, when the monitoring device included in the AAA server 140 or a separate monitoring device is connected to the AAA server 140, the monitoring screen generated by the monitoring screen data generator 145 may be visually monitored. .

Meanwhile, in the embodiment described with reference to FIG. 1, the PDSN 130 and the AAA server 140 are illustrated, but in the W-CDMA mobile communication system, the PDSN 130 is replaced with a Serving GPRS Support Node (SGSN). 140 is replaced by a Gateway GPRS Support Node (GGSN) and an Authentication Center (AuC). That is, PDSN 130 and SGSN are embodiments of means for providing a packet data service, and AAA server 140 and GGSN and AuC are embodiments of means for authentication and billing.

The process of collecting authentication and billing information by the AAA server while the roaming packet data service is provided by the mobile communication system for providing the roaming packet data service as described above will be described with reference to the message transmission flowchart of FIG. 3. Let's do it.

First, the mobile communication terminal 110 performs a traffic channel setup with the PDSN 130 through the wireless network 120, and then a LCP Configure Request (LCP Configure_req) message for setting a link control protocol (LCP). Is transmitted to the PDSN 130, the PDSN 130 transmits a confirmation message for the LCP configuration request message to the mobile communication terminal (110) (S401).

The mobile communication terminal 110 uses Challenge Handshake Authentication Protocol (CHAP) / Password Authentication Protocol (PAP) for LCP configuration. At this time, the mobile communication terminal 110 transmits a network identifier (NAI) defined in Request For Comments (RFC) 2486 in a PAP or CHAP message (S403). NAI is in the form of User @ Domain, User is an ID assigned as a user identifier, and domain is a domain name, for example, a mobile carrier name.

The PDSN 130 extracts the domain by viewing the NAI information transmitted from the mobile communication terminal 110, extracts the domain from the user name, and checks whether the mobile communication terminal 110 is a roaming service subscriber based on the extracted domain. . If the domain of the visited network 100 is sktelecom.com, if the domain included in the network identifier received from the mobile communication terminal 110 accessing the visited network 100 is china.com, the domain of the visited network 100 Since it is different from the mobile communication terminal 110 is found to be a roaming service subscriber.

If the mobile communication terminal 110 is not a roaming service subscriber, the general call processing procedure will be performed. In this case, the mobile communication terminal 110 serves as the home network 300 and not the visited network 100.

If the mobile communication terminal 110 is a roaming service subscriber, the PDSN 130 transmits a connection request message to the AAA server 140 using a packet data service protocol (eg, RADIUS) (S405), where the AAA server 140 The authentication information collecting unit 141 collects the connection request authentication information, that is, the transmission amount of the connection request packet (S407).

The AAA server 140 performs an authentication procedure with respect to the access request of the PDSN 130, and when authentication is completed, transmits an access acceptance message to the PDSN 130 using the packet data service protocol (S409). At this time, the authentication information collection unit 141 of the AAA server 140 also collects the connection acceptance authentication information, that is, the connection acceptance packet amount according to the connection request (S411).

Then, the PDSN 110 transmits an LCP configuration response (LCP Configure_res) message to the mobile communication terminal 110 (S413).

Meanwhile, in the embodiment of FIG. 3, the authentication procedure is performed by the AAA server 140 of the visited network 100, but the AAA of the home network 300 is passed through the AAA server 140 and the Internet 200. The authentication procedure may be performed by the server 310, or may be directly performed by the AAA server 310 of the home network 300 without passing through the AAA server 140 of the visited network 100.

Next, the mobile communication terminal 110 transmits an IPCP (IP Control Protocol) setup request message to the PDSN 130, and the PDSN 130 transmits a confirmation message for the IPCP setup request (S415).

In addition, the PDSN 130 transmits the charging start request message to the AAA server 140 using the packet data service protocol, and also provides the packet data service to the AAA server 310 of the home network 300 via the Internet 200. The billing start request message is transmitted using the protocol, and the AAA server 140 of the visited network 100 and the AAA server 310 of the home network 300 send the PDSN 130 a response message to the billing start request. It transmits (S417). At this time, the charging information collecting unit 143 of the AAA server 140 collects the charging start information, which includes information of a node (AAA server or PDSN) connected to the AAA server 310 of the home network 300 in the NAI. Based on the domain name, the mobile station is assigned an ID for each mobile operator and separated (S419).

Thereafter, IPCP negotiation is performed between the mobile communication terminal 110 and the PDSN 130 (S421), and the AAA server 310 of the home communication network 300 and the mobile communication terminal 110 of the visited network 100 tunnel. The packet data service is provided (S423). At this time, the AAA server 140 collects the charging information by providing the packet data service (S425).

When the mobile communication terminal 110, which has received the packet data service, transmits an LCP release request message to the PDSN 120, the PDSN 130 transmits a confirmation message for the corresponding message (S427). In addition, the PDSN 130 transmits a charging end request message to the AAA server 140 of the visited network 100 and the AAA server 310 of the home network 300 to receive a response message for the corresponding message (S429). At this time, the charging information collection unit 143 of the AAA server 140 collects the charging information by the end of the packet data service (S431).

In describing the process of collecting authentication and charging information by the AAA server 140 while providing a roaming packet data service, a time point such as access request and acceptance, charging start request and response, access, charging end request and response, or While the authentication and billing information was collected during the period, the AAA server 140 continuously collects the authentication data and the billing information related to the packet data protocol. For more details, refer to Table 1 and Table 2 below. Can be.

Table 1 below shows roaming service authentication information statistics items generated by the AAA server 140, and table 2 shows roaming service billing information statistics items generated by the AAA server 140.

As described above, the authentication information collecting unit 141 constituting the AAA server 140 of the visited network 100 during the roaming packet data service collects the packet data service protocol related authentication information to the monitoring screen data generating unit 145. The charging information collecting unit 143 collects the packet data service protocol related charging information and transmits the charging information to the monitoring screen data generating unit 145.

Then, the monitoring screen data generation unit 145 divides the collected authentication and billing information by reference time (for example, 1 minute, 5 minutes, 10 minutes, etc.) into statistical information, and processes the processed statistical information on the monitoring screen. It is generated in a data format and provided to a monitoring device included in the AAA server 140 or a separate monitoring device. Thus, when the monitoring device included in the AAA server 140 or a separate monitoring device is connected to the AAA server 140, the monitoring screen generated by the monitoring screen data generator 145 may be visually monitored.

Stats column Explanation Collection time The base time at which the packet data authentication information used for statistics was collected.-The collection start time or end time. Host ID Information of nodes connected to AAA server of home network during user authentication process-AAA server or PDSN of visiting network-Assigned by ID Request connection Connection request packet transmission volume among packet data service protocols Resend connection request Retransmitted Packet Data Service Protocol Connection Request Packet Amount Accept connection Connection Accept Packet Amount According to Connection Request Connection refused Connection rejection packet amount according to connection request Attempt to connect Connection attempt packet amount according to connection request Deformed packet Error in connection response packet Bad certification Amount of connection response packet with error in authentication or signature attribute Timeout Number of authentication timeouts

Stats column Explanation standard Time The base time at which the packet data authentication information used for statistics was collected.-The collection start time or end time.-Generate statistics after collecting information for a period of time. Host ID Information of nodes connected to AAA server of home network during user authentication process-AAA server or PDSN of visiting network-Assigned by ID Billing request Charge Request Packet Transmission Volume in Packet Data Service Protocol Resend Charge Request Retransmitted Packet Data Service Protocol Charge Request Packet Volume Accept billing Charge Accepted Packets Received Accept deformity Error in Charge Accepted Packets Bad certification The amount of billing response packets with errors in authentication or signature attributes Timeout Billing Timeout Count Start billing State of packet starts (charging starts by starting packet service) Billing end The state of the packet ends (packet service and billing end) Billing mid-term The state of the packet is intermediate (the packet service continues and generates a new charging packet)

The quality of the packet data service authentication process can be calculated by using the requested packet amount and the successful packet amount, and other statistical items are used to analyze the cause of the quality degradation. For example, in order to obtain the authentication quality of inbound roaming service, the success rate is obtained by using the connection request item and the connection acceptance item among the statistics items in Table 1, or the success rate is calculated by using the charge request item and the charge acceptance item among the statistics items in Table 2. Obtain

4 is a diagram illustrating an example of a packet data service monitoring screen for each mobile communication network according to an embodiment of the present invention. As such, the monitoring screen data generation unit 145 of the AAA server 140 provides a graphic screen of the packet data service status of each mobile communication network (by country) through a monitoring device. In this case, when the packet transmission rate of a specific operator falls below a certain threshold, the AAA server 140 may generate an alarm so as to determine the quality status with the corresponding operator.

In the above-described embodiment, the AAA server 140 processes the authentication information and the charging information after collecting and provides quality statistics information as an example. However, the AAA server 140 provides packet data when providing the roaming packet data service. Only serves to collect authentication information and billing information related to the service protocol, quality statistics information may be implemented to be performed by a separate quality management system.

5 is a diagram showing the configuration of a quality management system according to another embodiment of the present invention.

Referring to FIG. 5, the quality management system includes an AAA server 510 which collects authentication information and charging information related to a packet data service protocol when providing a roaming packet data service, and a packet data service protocol collected by the AAA server 510. Statistics generation server 520 that collects the relevant authentication information and billing information according to the statistics cycle to generate authentication statistics and billing statistics, and collects the authentication statistics and billing statistics generated by the statistics generation server 520 in accordance with the statistics cycle In addition to generating quality statistical information for each network, processing quality statistics information generated by the quality management server 530 and the quality management server 530 to determine whether there is a failure can be monitored visually after generating the monitoring screen data It outputs a quality statistics monitoring screen so as to alert the failure state when a failure is determined by the quality management server 530. And a monitoring device (540).

A process of providing service quality information of a roaming packet data service between mobile communication networks using the quality management system as shown in FIG. 5 will be described with reference to FIG. 6.

First, when providing a roaming packet data service, the AAA server 510 collects packet data service protocol related authentication information and charging information, and transmits the collected authentication information and charging information to the statistics generation server 520 (S601). . Since the process of collecting the authentication information and the charging information has been described in detail in the description of the embodiment with reference to FIGS. 1 to 3, the description thereof will be omitted.

The statistics generation server 520 generates the authentication statistics and the charging statistics by collecting the packet data service protocol related authentication information and the charging information collected by the AAA server 510 according to a predetermined statistics period. The items of Table 1 described above are employed, and the accounting statistics item employs the items of Table 2 described above (S603).

Next, the quality management server 530 collects authentication statistics and charging statistics generated by the statistics generation server 520 (S605) and generates quality statistics information for each network. At this time, the collection cycle of the authentication statistics and charging statistics is preferably matched to the statistics period used in the statistics generation server 520. Here, generating the quality statistics information for each network means analyzing the host IDs of Tables 1 and 2 and generating the quality statistics information of the packet data service for each service provider (S607).

Then, the monitoring device 540 receives the quality statistics information from the quality management server 530, generates the monitoring screen data, and outputs the quality statistics monitoring screen so as to be visually monitored (S609).

Meanwhile, the quality management server 530 determines whether a failure occurs by checking whether a quality degradation occurs in a specific network or the entire network based on the quality statistics information for each network, and when the failure is determined, monitors the failure state to the monitoring device 540. Inform (S611).

Then, the monitoring device 540 alerts the corresponding failure occurrence state so that the failure occurrence state can be confirmed through visual or hearing (S613).

Here, in the flowchart of FIG. 6, steps S611 and S613 are performed after the step S609 is performed. However, the step of determining whether there is a failure is performed together with the generation of quality statistics for each network in step S607. It may be performed together with the display of the quality statistics information in step S609.

It has been described so far limited to one embodiment of the present invention, it is obvious that the technology of the present invention can be easily modified by those skilled in the art. Such modified embodiments should be included in the technical spirit described in the claims of the present invention.

The present invention provides a packet data service through roaming between separate mobile communication networks in all future mobile communication systems including the fourth generation, as well as CDMA networks, W-CDMA networks, HSDPA networks, and GSM networks. It is available.

1 is a diagram illustrating a configuration of a mobile communication system for providing a roaming packet data service according to an embodiment of the present invention;

2 is a diagram illustrating a detailed configuration of an AAA server in a mobile communication system for providing a roaming packet data service according to an embodiment of the present invention;

3 is a diagram illustrating a message transmission flow for a roaming packet data service according to the present invention;

4 is a view showing an example of a packet data service monitoring screen for each mobile communication network according to the present invention;

5 is a view showing the configuration of a quality management system according to another embodiment of the present invention;

6 is a flowchart illustrating a quality control method according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: visited network 110: mobile communication terminal

120: wireless network 130: PDSN

140, 310, 510: AAA server 141: authentication information collection unit

143: billing information collection unit 145: monitoring screen data generation unit

200: Internet 300: Home Network

520: statistics generation server 530: quality management server

540: monitoring device

Claims (28)

A server apparatus for providing a packet data service through roaming between separate mobile communication networks, When providing a packet data service through the roaming, at least one of the authentication information and the charging information related to the packet data service protocol is collected to provide quality statistics information of the packet data service for each mobile communication network. Server device for roaming packet data service. The method of claim 1, The authentication information may calculate a success rate including a transmission amount of a connection request packet through the packet data service and a connection acceptance packet amount according to the connection request. Server device for roaming packet data service. The method of claim 2, The authentication information includes a statistical item that can be used to analyze the cause of the quality degradation of the packet data service. Server device for roaming packet data service. The method according to any one of claims 1 to 3, The server device, An authentication information collecting unit collecting the packet data service protocol related authentication information when providing a packet data service through the roaming; And a monitoring screen data generation unit configured to generate the monitoring screen data by processing the collected authentication information into the quality statistics information. Server device for roaming packet data service. The method of claim 1, The charging information may include a charge request packet transmission amount and a charge acceptance packet amount through the packet data service to calculate a success rate. Server device for roaming packet data service. The method of claim 5, wherein The charging information includes a statistical item that can be used to analyze the cause of the quality degradation for the packet data service. Server device for roaming packet data service. The method according to any one of claims 1, 5 and 6, The server device, A charging information collecting unit configured to collect charging information related to the packet data service protocol when providing a packet data service through the roaming; And a monitoring screen data generating unit configured to generate the monitoring screen data by processing the collected charging information into the quality statistics information. Server device for roaming packet data service. The method of claim 7, wherein The server device may generate an alarm when the packet transmission rate of a specific mobile communication network falls below a certain threshold to determine the quality status. Server device for roaming packet data service. A system for providing a packet data service as a visited network through roaming to a mobile communication terminal joined to a home network, A wireless network for processing a radio link and a wireless signal with a wireless access standard to ensure mobility of the mobile communication terminal; Serving means in charge of IP address assignment and routing for the mobile communication terminal connected to the wireless network; Collecting at least one of packet data service protocol related authentication information and billing information when providing a packet data service through the roaming while in charge of authentication and billing of the wireless data service of the mobile communication terminal through the serving means. And authentication charging means for providing quality statistical information of the packet data service for each mobile communication network. System for roaming packet data service. The method of claim 9, The authentication charging means is implemented as an AAA (Authentication Authorization Accounting) server that is in charge of authentication, authorization, and charging for the wireless data service of the mobile communication terminal located in a service area. System for roaming packet data service. The method of claim 9, The authentication charging means is implemented by Gateway GPRS Support Node (GGSN) and Authentication Center (AuC). System for roaming packet data service. The method of claim 9, The authentication information may calculate a success rate including a transmission amount of a connection request packet through the packet data service and a connection acceptance packet amount according to the connection request. System for roaming packet data service. The method of claim 12, The authentication information includes a statistical item that can be used to analyze the cause of the quality degradation of the packet data service. System for roaming packet data service. The method of claim 9, The charging information may include a charge request packet transmission amount and a charge acceptance packet amount through the packet data service to calculate a success rate. System for roaming packet data service. The method of claim 14, The charging information includes a statistical item that can be used to analyze the cause of the quality degradation for the packet data service. System for roaming packet data service. The method according to any one of claims 9 to 11, The authentication charging means may generate an alarm when the packet transmission rate of a specific mobile communication network falls below a certain threshold so as to determine the quality status. System for roaming packet data service. A method for providing a packet data service in a visited network through roaming to a mobile communication terminal joined to a home network, Transmitting, by the mobile communication terminal, a network identifier (Network Access Identifier) to the visited network; Receiving, by the visiting network, the network identifier and authenticating whether the mobile communication terminal is subscribed to a roaming service; When the mobile communication terminal is subscribed to the roaming service, providing the roaming packet data service through the connection with the home network; Providing, by the visited network, the quality information of the packet data service for each mobile communication network by collecting at least one of packet authentication information and charging information related to the packet data service protocol while providing the roaming packet data service; Method for roaming packet data service. The method of claim 17, The authentication information may calculate a success rate including a transmission amount of a connection request packet through the packet data service and a connection acceptance packet amount according to the connection request. Method for roaming packet data service. The method of claim 18, The authentication information includes a statistical item that can be used to analyze the cause of the quality degradation of the packet data service. Method for roaming packet data service. The method of claim 17, The charging information may include a charge request packet transmission amount and a charge acceptance packet amount through the packet data service to calculate a success rate. Method for roaming packet data service. The method of claim 20, The charging information includes a statistical item that can be used to analyze the cause of the quality degradation for the packet data service. Method for roaming packet data service. The method of claim 17, The method further includes the step of generating an alert when the packet transmission rate of the specific mobile communication network falls below a certain threshold to determine the quality status. Method for roaming packet data service. A system for providing a packet data service as a visited network through roaming to a mobile communication terminal joined to a home network, An authentication authorization accounting (AAA) server that collects at least one of packet data service protocol related authentication information and billing information when providing a packet data service through roaming; A statistics generation server which collects the information collected by the AAA server according to a statistic period to generate statistics; A quality management server that collects statistics generated by the statistics generating server and generates quality statistical information for each network; A monitoring device which processes the quality statistics information generated by the quality management server to generate monitoring screen data and then outputs the quality statistics monitoring screen System for roaming packet data service comprising a. The method of claim 23, The quality management server determines whether a failure occurs by checking whether a quality degradation occurs in a specific network or the entire network based on the quality statistics information. The monitoring device alerts the failure state according to the determination result of the failure. System for roaming packet data service. The method of claim 23, The quality management server generates the quality statistics information in accordance with the statistics period. System for roaming packet data service. A method for providing a packet data service in a visited network through roaming to a mobile communication terminal subscribed to a home network, Collecting at least one of packet data service protocol related authentication information and billing information when providing a packet data service through the roaming; Generating statistics by collecting the collected information according to a statistical period; Generating quality statistics information for each network by collecting the generated statistics; Processing the generated quality statistics information to generate monitoring screen data and outputting the quality statistics monitoring screen; Method for a roaming packet data service comprising a. The method of claim 26, Method for the roaming packet data service, Determining whether a failure occurs by checking whether a quality degradation occurs in a specific network or the entire network based on the quality statistics information; Alarming a failure state according to a result of the determination of the failure; The method for a roaming packet data service further comprising. The method of claim 26, The generating of the quality statistics information may include generating the quality statistics information according to the statistics period. Method for roaming packet data service.

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