KR100463530B1 - Service Providing Method in Mobile Communication System - Google Patents

Abstract

The present invention relates to a service providing method of a mobile communication system, wherein a service is provided by receiving at least two or more access point names from a service subscriber and accessing one of the access point names having an address of a packet gateway exchange available among them. Characterized in that it can be provided.

Therefore, even if a service request using a specific APN is rejected, the service rejection rate can be lowered because the service can be set using another APN.

Description

Service Providing Method in Mobile Communication System

The present invention relates to a mobile communication service, and more particularly, to a method for providing a service in a mobile communication system suitable for improving a quality of service and a subscriber's satisfaction by reducing a rejection rate for a service request.

1 is a configuration diagram of a general packet mobile communication system, in which a public land mobile network (hereinafter referred to as PLMN) 12 is a serving GPRS support node (hereinafter referred to as SGSN) (12a). General Packet Radio Service back-bone network, which includes a Gateway GPRS Support Node (hereinafter referred to as GGSN) 12b, and a wireless network subsystem for subscriber wireless access. (12d), a domain name service having a GGSN (12b) IP address in a GPRS backbone network (Domain Name Server: hereinafter referred to as DNS). -It is connected with main network 12c in between.

A mobile subscriber can access an internet network (IP network) 13 through the PLMN 12 by using his mobile terminal (MS) 11, and a web server connected to the internet network 13 (Web) A packet service can be used by connecting to a server 14a, a video on demand (VOD) 14b, an e-mail server 14c, or the like. In order to provide each service, servers of the IP network 13 have their own unique access point names (hereinafter referred to as APNs).

Next, a service providing method using an access point name using method according to the prior art will be described.

FIG. 2 is a flowchart illustrating a service providing method according to the prior art. First, a general packet radio service (GPRS) service subscriber selects one APN corresponding to a desired service of a mobile terminal (MS) 11 The MS 11 transmits the APN to the SGSN 12a by including it in a packet data protocol context (hereinafter referred to as PDP context) request message (S201). .

The message format of the PDP Context request message is shown in FIG. 3, and includes a protocol identifier (PD), a transaction ID (TI), a message ID (Message ID: M-ID), and a network service. Network Service Access Point ID (NSAPI), Logical Link Control Service Access Point Identifier (LLC SAPI), Quality of Service (QoS), APN, PDP CO (PDP) Configuration Option).

Here, the access point name (APN) included in the PDP context request message is one.

The SGSN 12a queries one APN included in the received PDP Context Request message to the DNS server 12e (S202) to find an IP address of the available GGSN 12b.

The process of determining the IP address of the GGSN 12b is a process of determining whether an available IP address of the GGSN 12b exists (S203), and if there is an IP address of the available GGSN 12b, SGSN ( 12a) transmits a PDP context creation request message (CreatePDP Context Request) to the corresponding GGSN 12b using the GPRS Tunneling Protocol (hereinafter referred to as GTP) (S204) to establish a connection with the IP network 13. request.

GGSN 12b receives the PDP context creation request message (Create PDP Context Request) to generate a PDP context, and determines whether this procedure is normally performed (S205). If the PDP context is generated normally, the GGSN 12b returns the result. To SGSN 12a, whereupon SGSN 12a sends a PDP Context Activation Accept message to MS 11 (S206).

Subsequently, when the MS 11 accepts the creation of the PDP context (S207), packet service is started through the connection to the APN (S208).

On the other hand, when the IP address of the GGSN 12b is not found in the process of determining the IP address of the GGSN 12b, the SGSN 12a sends a PDP context rejection message to the MS 11. ) To reject the creation of the PDP context (S209).

In addition, if the PDP context is not normally generated in the GGSN 12b, the GGSN 12b notifies the SGSN 12a of the result, and this indicates that the SGSN 12a is denied generation of the PDP context to the MS 11. As a notification, the mobile terminal (MS) 11 does not receive the desired service (S209).

In the prior art described above, since only one APN is used, the service request rejection rate is high.

That is, if a service request using one APN included in the PDP context activation request message is rejected, a new APN input must be received from the service subscriber, and the PDP context activation request message must be retransmitted including the new APN. As a result, radio resources are wasted and service quality is degraded by lengthening the service request time.

The present invention has been made to solve the above problems, to provide a service providing method in a mobile communication system that can prevent the waste of radio resources and improve the quality of service by reducing the rejection rate of service requests. There is this.

1 is a configuration diagram of a packet mobile communication system,

2 is a flowchart illustrating a service providing method according to the prior art,

3 is a diagram illustrating a structure of a PDP context activation request message according to the prior art;

4 is a flowchart illustrating a service providing method according to the present invention;

5 is a diagram illustrating a structure of a PDP context activation request message according to the present invention.

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

11: mobile terminal (MS) 12: public land mobile network (PLMN)

13: Internet network

The present invention includes the steps of receiving at least two Access Point Names (APNs) from a mobile terminal, and including an address of a Packet Gateway Switching Station (GGSN) available among the access point names. And selecting a single access point name, and providing a service to the mobile terminal using an access point corresponding to the access point name. In the mobile communication packet switching station, at least two access point names are included. Receiving a packet data protocol context activation request message, including priorities, prioritizing the access point names, and according to the priority, until an address of an available packet gateway switching center is found. Sending a name to the Domain Name Service server and a packet data protocol context creation request message. And access to an access point name having the address of the available packet gateway switch. [0030] Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

In the present invention, by using a plurality of APNs to reduce the service request rejection rate than the prior art using only one APN.

As shown in FIG. 5, the structure of the PDP Context Activation Request message according to the present invention is a Protocol Discriminator (PD), a Transaction ID (TI), a Message ID (Message ID). : M-ID, Network Service Access Point ID (NSAPI), Logical Link Control Service Access Point Identifier (LLC SAPI), Quality of Service (QoS) ), Access point names (APN-1, APN-2, ..., APN-n), and PDP CO (PDP Configuration Option).

The number of APNs included in the PDP context activation request message is at least two or more, and the APNs have priority.

In general, the process of setting up a wireless Internet service is a process of finding an IP address of the GGSN 12b by asking an access point name of the DNS server 12e. The process of assigning priority to the APNs is performed by a mobile subscriber. The process of giving priority to a service to be accessed.

And, as a method of assigning priority to the APNs, for example, the order in which the PDP context activation request message is sent, that is, APN-1, APN-2,... , A method of giving priority to APN-n order, a method of giving priority to the above order, and the like.

Next, a service setting method using the access point name using method according to the present invention.

4 is a flowchart illustrating a packet service process according to the present invention, in which a GPRS service subscriber selects a plurality of APNs (n, n≥2) for a place where he / she wants to access and receive a service of his mobile terminal (MS). (11), the mobile station (MS) includes the plurality of APNs (APN-1, APN-2, ..., APN-n) input by the service subscriber in the PDP context activation request message, and includes the SGSN 12a. Transfer to (S401).

Advantageously, the APNs use similar services.

In response, SGSN 12a determines the priority of APNs included in the PDP context activation request message (S402).

As a method of assigning priority to the APNs, for example, the order of sending them in the PDP context activation request message, that is, APN-1, APN-2,... , Prioritizing in the order of APN-n, and prioritizing in the reverse order.

Then, APN (0), APN (1), APN (2),... , APN (n).

Subsequently, the IP addresses of the GGSN 12b are found using the APNs one by one in order of priority until an available IP of the GGSN 12b is found (S404).

The process of determining the IP address of the GGSN 12b is a process of determining whether an IP of the GGSN 12b is available by inquiring the APN (i) of the DNS server 12e. Contact (12e).

At this time, if there is no IP of the GGSN 12b, the IP address of the GGSN 12b is found using the APN having the next priority, that is, the APN 2.

This process is repeated to find the available IP address of the GGSN 12b.

Subsequently, if an IP address of the GGSN 12b available for a specific APN is found, a PDP context creation request message is transmitted to the GGSN 12b to request generation of a PDP context (S405).

In addition, it is checked whether the PDP context is normally generated (S406). If the PDP context is normally generated, the mobile terminal (MS) 11 transmits a PDP context activation acceptance message to the MS (S407) by accepting the creation of the PDP context. The MS 11 enables the packet service to be provided through the connection to the specific APN (S408).

On the other hand, if the GGSN 12b rejects the normal creation of the PDP context, the SGSN 12a returns to the step of finding an available IP address of the GGSN 12b using the APN of the next priority.

The process of finding the IP of the available GGSN 12b can be applied to the APN having the lowest priority, that is, APN (n) by applying one by one in order of APN priority, and APN (n) is applied to the DNS server 12e. If it is not possible to find the IP address of the available GGSN 12b, the mobile terminal (MS) 11 transmits a PDP context activation rejection message to reject the service (S410).

The service providing method in the mobile communication system of the present invention as described above has the following effects.

First, since a service subscriber uses a plurality of APNs that support similar services when requesting a service, even if a service request using a specific APN is denied, the service rejection rate can be lowered by using another APN.

Secondly, when a denial of service occurs according to the conventional use of one APN, a service request should be performed again. However, since the denial of service rate can be lowered using a plurality of APNs, wireless and wired signaling resources can be efficiently used. In addition, the efficiency of the system can be improved by reducing the load on the system.

Third, when a plurality of APNs are used, service access is possible according to the priority of the service by assigning different priorities.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the examples, but should be defined by the claims.

Claims (7)

Receiving at least two Access Point Names (APNs) from a mobile terminal; Selecting one access point name from among the access point names including an address of an available Gateway GPRS Support Node (GGSN); And And providing a service to the mobile terminal using an access point corresponding to the access point name. The method of claim 1, The selecting of the access point name comprises selecting the access point name in consideration of the priority given to the two or more access point names. Receiving, at the mobile packet switching station, a packet data protocol context activation request message comprising at least two access point names; Assigning priority to the access point names; Transmitting, according to the priority, to an access point naming domain name service server until an address of an available packet gateway switching center is found; And Using a packet data protocol context creation request message to connect to an access point name having the address of the available packet gateway switch. The method of claim 3, wherein Priority given to the access point names, And providing the access point names in the packet data protocol context activation request message. The method of claim 3, wherein Priority given to the access point names, And providing the access point names in the reverse order of the access point names included in the packet data protocol context activation request message. The method of claim 3, wherein If no address is found for an available packet gateway switching center, sending a packet data protocol context activation rejection message to the mobile terminal. delete