KR20050020203A - Packet Transmission Method using same IP Address in WCDMA - Google Patents

Abstract

PURPOSE: A packet transmission method using the same IP address in a WCDMA network is provided to use plural APNs(Access Point Names) in one IP address, so that one terminal can access various contents services by using the one IP address in a WCDMA packet network. CONSTITUTION: A UE(User Equipment)(100) requests an SGSN(Serving GPRS Support Node) to send the first PDP context activation. The SGSN requests a GGSN to generate the first PDP context. The GGSN(Gateway GPRS Support Node) assigns an IP based on APN information, and sets the first session. The UE(100) uses the assigned IP address while differently setting APNs, and requests the SGSN to send the second PDP context activation. The SGSN requests the GGSN to generate the second PDP context. The GGSN sets the second session.

Description

Packet transmission method using same IP address in BCDM network {Packet Transmission Method using same IP Address in WCDMA}

The present invention relates to a method for saving an IP address according to content charging using APN in a WCDMA IMT-2000 mobile communication environment.

In the WCDMA packet network according to the prior art, the terminal may use multiple sessions with a single IP address, but uses a single access point name (APN). By using the APN, the APN information can be provided to the billing information used by the subscriber using the WCDMA network by dividing the content service by APN, and the content billing is possible. However, when one terminal accesses multiple content services, APNs should be set differently, and since one APN can be used as one IP address, there is a problem in that multiple IP addresses must be used for multiple content billing. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to enable multiple APNs for one IP address, thereby enabling one terminal to use multiple content services in one WCDMA packet network. To make it accessible.

In order to achieve the above object, the packet transmission method according to the present invention, a) the UE (UE) requesting the first PDP context activation to the SGSN; b) the SGSN requesting a GGSN to create a first PDP context; c) the GGSN assigning an IP based on APN information to establish a first session; d) requesting, by the UE, a second PDP context activation to SGSN by using the assigned IP address and different APN; e) the SGSN requesting a GGSN to create a second PDP context; And f) the GGSN establishing a second session.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. In the drawings, the same reference numerals are used as much as possible for the same or similar components.

Prior to explaining the configuration of the present invention, a general configuration of the WCDMA network will be described with reference to the schematic diagram of the WCDMA network shown in FIG.

As shown in FIG. 1, a WCDMA network includes a user equipment (UE) 100, a UMTS terrestrial radio access network (UTRAN) 200, a core network 300, and an external network 400 connected thereto. . Communication between the UE 100 and the UTRAN 200 is performed by the Uu interface, and communication between the UTRAN 200 and the CN 300 is performed by the Iu interface.

The UE is composed of a Mobile Equipment (ME) 110 and a UMTS Subscriber Identity Module (USIM) 120, and the ME 110 and the USIM 120 communicate over a Cu interface. The ME 110 is a wireless terminal used for wireless communication via the Uu interface, and the USIM 120 performs subscriber authentication, performs an authentication algorithm, and stores authentication and encryption keys and some subscriber information required by the terminal. It is a smart card.

The UTRAN 200 consists of at least one Radio Network Controller (RNC) 220 and a Node B 210 connected thereto. The RNC 220 and the Node B 210 communicate with each other through an Iub interface, and between the RNC 220. It communicates with the Iur interface. The RNC 220 owns and controls radio resources and is a service access point in all services (eg, connection management to the UE) that the UTRAN 200 provides to the CN 300. Node B 210 converts the data flow between the Iub interface and the Uu interface and participates in radio resource management.

The main components of the CN 300 generally include a Home Location Register (HLR) 330, a Mobile Services Center / Visitor Location Register (340), a Gateway MSC (GMSC) 350, and a Serving GPRS Support Node (SGSN). 310) and a Gateway GPRS Support Node 320 (GGSN). HLR 330 is a database located in the user home system that stores a master copy of the user service profile. The MSC / VLR 340 is a switch (MSC) and a database (VLR) that provide the UE 100 at its current location for Circuit Switched (CS) services. The GMSC 350 is a switch at a point where a Universal Mobile Telecommunication System (UMTS) Public Land Mobile Network (PLMN) is connected to an external CS network. The functionality of SGSN 310 is similar to that of MSC / VLR but is generally used for Packet Switched (PS) services. The portion of the network connected via SGSN 310 is often considered a PS domain. The GGSN 320 functionality is close to the functionality of the GMSC but related to the PS service.

In general, the external network is divided into two groups, the CS network 420 and the PS network 410. CS network 420 provides a circuit switched connection as a conventional telephone service, and may be, for example, PLMN, PSTN, ISDN, and the like. The PS network 410 provides a packet data service, for example, the Internet.

FIG. 2 is a schematic diagram of a WCDMA packet network related to packet transmission in the WCDMA network of FIG. The WCDMA packet network shown in FIG. 2 is substantially the same as that of FIG. 1 except that a DNS (Domain Name System) 360 is added. 3 is a diagram illustrating packet transmission when two sessions are set up using the same IP address.

Referring to FIGS. 2 and 3, the UE 100 receives a packet from the Internet, which is an external network.

First, a first PDP context activation process in which a UE (UE) 100 establishes a first session with the GGSN 320 will be described.

The UE 100 requests the first PDP context activation to the SGSN 310 via the UTRAN 200 [step 1]. In this case, the terminal may use a fixed IP address or may be dynamically allocated an IP from the GGSN 320 (see step 5). In this case, APN in IE (Information Element) of PDP context activation is used.

The SGSN 310 queries the DNS 360 with APN information [step 2], and the DNS 360 provides the SGSN 310 with the IP address of the GGSN 320 [step 3]. SGSN 310 requests GGSN 320 to create a first context according to the IP address [step 4]. The GGSN 320 establishes a first session by allocating an IP to the UE 100 from an IP pool set in the APN based on the APN information [step 5].

After establishing the first session as described above, the UE 100 has one IP address and APN information. After establishing the first session, the GGSN 320 searches for the presence of TFT (Traffic Flow Template) filtering information for the APN and includes the TFT in the session information if it exists [step 6].

When the UE 100 requests a new second session in addition to the existing session for another content service, a second PDP context activation process is performed as follows. For reference, as used herein, the "second PDP context activation" is not a Secondary PDP context activation because it does not use the same IP address and the same APN that was previously assigned, and is not used in the Primary PDP context activation. Corresponding.

The UE (UE) 100 requests the second PDP context activation to the SGSN 310 with different APNs (step 7). The SGSN 310 requests the GGSN 320 to generate a second context (step 8). At this time, the UE 100 cannot set the TFT because it is not the secondary PDP context activation process as described above. Accordingly, the UE 100 opens a new second session with the GGSN 320 through a new primary PDP context activation (step 9).

In this case, the GGSN 320 needs to distinguish it from downlink traffic because two sessions with the same IP address are created. Therefore, when the new APN is allocated to the old IP address and the request for generation of the PDP context is requested from the SGSN 310, the GGSN 320 adds the TFT information corresponding to the APN to the generated session information [step 10 ]. In other words, after establishing the second session, the GGSN 320 searches for the presence of the TFT filtering information for the APN as in the case of the first session establishment, and includes the TFT filtering information in the session information. TFT filtering information for each APN includes session information that a UE (UE) 100 wants to establish for a corresponding session, that is, a content IP address to be accessed and a port number for a corresponding service. Data transmission is possible in each established session for downlink packet data destined for an address. Thereby, the TFT may exist for the first session (PDP context) and the second session for the terminal (UE) 100 using the same IP address, and at least one TFT may not exist.

If at least one TFT does not exist when two sessions are open, when downlink traffic enters the UE 100, the session with the TFT if the corresponding traffic is downlinked to the packet filter value of the TFT. Downlink traffic is delivered to the (PDP context), and all downlink traffic that does not correspond to the TFT packet filter value is transferred to the session (PDP context) in which the TFT does not exist [step 11].

While the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will recognize that various modifications or changes can be made without departing from the spirit and scope of the invention.

As described above, according to the present invention, since a UE can access various content services using one IP address in a WCDMA packet network, content billing using APNs can be performed while saving an IP address.

1 is a schematic diagram of a WCDMA network.

2 is a schematic diagram of a WCDMA packet network.

3 is a diagram illustrating packet transmission when two sessions are set up using the same IP address.

Explanation of symbols on the main parts of the drawings

100: UE (User Equipment)

200: UTRAN (UMTS Terrestrial radio access network)

210: Node B

220: RCN (Radio Network Controller)

300: CN (Core Network)

310: Serving GPRS Support Node (SGSN)

320: Gateway GPRS Support Node (GGSN)

400: external network

410: Internet

Claims (3)

A packet transmission method using APN in a WCDMA network, a) requesting, by a UE, a first PDP context activation to an SGSN; b) the SGSN requesting a GGSN to create a first PDP context; c) the GGSN assigning an IP based on APN information to establish a first session; d) requesting, by the UE, a second PDP context activation to SGSN by using the assigned IP address and different APN; e) the SGSN requesting a GGSN to create a second PDP context; And f) the GGSN establishing a second session. The method of claim 1, Step a) is a1) the SGSN querying DNS with APN information; And a2) the DNS further comprising providing a SGSN an IP address of a GGSN. The method according to claim 1 or 2, Step c) is c1) the GGSN searching for whether there is TFT filtering information for the APN, and if present, including the TFT in the first session information; Step f) is f1) The GGSN further searches for whether the TFT filtering information exists for the APN, and if present, includes the TFT in the second session information.