KR20130007286A - Packet data network gateway and mobile communication system with default rat-type and method thereof - Google Patents

Abstract

PURPOSE: A packet data network gateway having default RAT-type information, a mobile communication system, and a method thereof are provided to recognize an access network defined as default RAT-type parameter information from an access network. CONSTITUTION: A terminal is connected to an access network. A PDN(Packet Data Network) gateway(110) distinguishes an interface with the access network. The PDN gateway supplies default RAT-TYPE parameter information as access network information. The PDN gateway includes a table. The table records predetermined default RAT-type parameter information. [Reference numerals] (100) Terminal(UE); (AA) Internet(PDN)

Description

PACKET DATA NETWORK GATEWAY AND MOBILE COMMUNICATION SYSTEM WITH DEFAULT RAT-TYPE AND METHOD THEREOF}

The present invention relates to a Packet Data Network Gateway (EPC) of an Evolved Packet Core (EPC) network, in particular, to assign an IP (Internet Protocol) to a terminal in an EPC network and to interwork with an external Internet network and a Non-3GPP network. Default radio access technology (RAT) -type parameter information for each interface with an access network serviced by a terminal, such as an external Internet network or a Non-3GPP network, in a packet data network gateway that controls a session for a session Packet data with a default RAT for each interface in the EPC network that defines the access network in advance and identifies the access network type defined in the default RAT-TYPE parameter information when requesting access from the access network. A network gateway, a mobile communication system, and a method are provided.

3rd Generation Partnership Project (3GPP) mobile communication systems based on Wideband Code Division Multiple Access (WCDMA) radio access technology are widely deployed around the world. HSDPA (High Speed Downlink Packet Access), which can be defined as the first evolutionary phase of WCDMA, provides 3GPP mobile communication system with highly competitive wireless access technology in the mid-term future.

However, as the requirements and expectations of users and operators continue to increase and competition for developing wireless access technologies continues, there is a need to evolve new technologies in 3GPP mobile communication systems in order to gain competitiveness in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interface, and adequate power consumption of the terminal are demanding requirements. In addition, the prevention of unnecessary latency in the network node and the efficient use of network resources can also promote the technology evolution in 3GPP.

In 3GPP Release 8, a Network Architecture called Evolved Packet Core (EPC) is described as one of mobile communication systems for meeting the above-mentioned requirements. EPC is a set of network nodes for 3GPP LTE (Long Term Evolution) system. The EPC evolves the core network of the existing 3GPP system architecture to support Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN), which is an evolved RAN, And has an efficient network structure that simplifies the network node. A wireless communication system including an EPC and an E-UTRAN is called an EPS (Evolved Packet System).

The EPC network is largely divided into three logical entities: a packet data network gateway (PDN-GW), a serving gateway (Serving-GW), and a mobility management entity (MME).

First, in the user plane, the PDN GW is a global mobility anchor for mobility between 3GPP access technology and non-3GPP access technology (such as CDMA2000, WiMAX, or WIFI) and a gateway to an external network. Session control and user plane interworking with external internet network and non-3GPP network. Tunneling and IP routing function while maintaining routing information with serving gateway and external network for packet service. Has

Next, as another user plane entity, the serving gateway is a mobility anchor for mobility between 3GPP accesses (E-UTRAN, UTRAN, GERAN). The Serving Gateway is a session control and user plane node that handles payload traffic according to the established session, interworking with the eNodeB through the S1-U interface, and Inter Long (Long Term Evolution) / 3GPP Handover ).

Next, the mobility management entity (MME) is a control plane entity that is responsible for mobility management of a mobile terminal (User Element (UE)) moving between different EUTRAN base stations (eNodeBs) and also manages session management.

On the other hand, among the components of the EPC network, especially the packet data network gateway, in addition to the functions described above, the QoS or billing, etc. must be set differently according to the access network serviced by the terminal such as WCDMA, LTE, WIFI, and external Internet network. There is a case.

To this end, RAT-TYPE parameter information, which is information on the type of the access network, must be received from each access network connected to the packet data network gateway. However, when such RAT-TYPE parameter information is not received according to the access network, packet data is received. There was a problem that the network gateway could not correctly handle the services according to the access network.

Accordingly, in the present invention, an access network in which an EPC network is serviced by an external Internet network or a Non-3GPP network such as a packet data network gateway that assigns an IP to the terminal and controls a session for interworking with an external Internet network and a Non-3GPP network. Default RAT-TYPE parameter information is defined in advance for each interface with the access network, and when access is requested from the access network, the access network type defined in the default RAT-TYPE parameter information is identified to provide services according to the access network. The present invention provides a packet data network gateway, a mobile communication system, and a method having a default RAT for each interface in an EPC network.

The present invention described above is a mobile communication system, which identifies an interface between an access network to which a terminal is connected and an access network to which the terminal is serviced, and accesses the default RAT-TYPE parameter information set in advance corresponding to the interface. It includes a packet data network gateway that provides information about the network.

The packet data network gateway may include a table that records preset default RAT-TYPE parameter information for each interface with the access network.

The present invention also provides a packet data network gateway, comprising: a default RAT-TYPE table for storing default RAT-TYPE parameter information corresponding to an interface with the access network to an access network to which a terminal is connected; And a network access processor that identifies an interface with a network, reads default RAT-TYPE parameter information corresponding to the interface from the default RAT-TYPE table, and provides the information on the access network.

In addition, the default RAT-TYPE parameter information, characterized in that the default is set to EUTRAN, UTRAN, GERAN, WLAN, GAN or HSPA Evolution according to the access network.

The access network may be a WCDMA network, an LTE network, a WIFI network, or an internet network.

The present invention also provides a method of providing RAT-TYPE parameter information in a packet data network gateway, the method comprising: storing default RAT-TYPE parameter information corresponding to an interface with the access network to an access network to which the terminal is connected; Receiving an access request from the serviced access network, identifying an interface with the access network, reading default RAT-TYPE parameter information set for the interface, and storing the default RAT-TYPE parameter information. Providing information on the access network.

In the present invention, the packet data network gateway for allocating IP to the terminal in the EPC network and controlling the session for interworking with the external internet network and the Non-3GPP network is connected with an access network, such as an external Internet network or a Non-3GPP network, which the terminal is serviced. Default RAT-TYPE parameter information for each interface is defined in advance, and when access is requested from the access network, the access network type defined in the default RAT-TYPE parameter information is identified to enable services according to the access network. There is an advantage.

1 is an overall network configuration diagram of an EPC network according to an embodiment of the present invention;
2 is an exemplary RAT-TYPE table provided in a packet data network gateway according to an embodiment of the present invention;
3 is a detailed block diagram of a packet data network gateway according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the present invention. In the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. The following terms are defined in consideration of the functions of the present invention, and may be changed according to the intentions or customs of the user, the operator, and the like. Therefore, the definition should be based on the contents throughout this specification.

1 illustrates a network configuration of an EPC network according to an embodiment of the present invention.

The user equipment (UE) 100 communicates with network nodes or other terminals constituting a core network through a radio access network (RAN) such as an Evolved-UMTS Terrestrial Radio Access Network (E-UTRAN). Device for doing this. Such terminals include, but are not limited to, mobile stations (MSs), fixed or mobile subscriber units, cellular telephones, digital personal digital assistants (PDAs), computers, or any other type of user device capable of operating in a wireless environment. It is not limited.

In addition, the terminal 100 includes a processor, a signal generation and processing means, and a transceiver for transmitting and receiving radio signals with a radio access network (RAN). Although not shown in the drawing, the terminal 100 may include a memory for storing user data or a program, a display unit for displaying various information or data of the terminal, a keypad or a touch screen. It may further include a user interface such as).

Meanwhile, the core network includes a plurality of network nodes constituting the core of the mobile communication system. The core network may be, for example, network nodes of a PS communication system such as a General Packet Radio Service (GPRS) system, a Universal Mobile Telecommunications System (UMTS), or an Evolved PacketCore (EPC) system that is a 3GPP Long Term Evolution (LTE) system. It may be configured, but is not limited thereto.

In FIG. 1, only the minimum components of the core network required to describe an embodiment of the present invention are disclosed, and the configuration of the core network is not limited to the components disclosed in FIG. 1. In the following, the core network is described in the case of being composed of network nodes of the EPC, but this is merely for convenience of description and should not be construed as limited to the embodiments of the present invention.

Hereinafter, each component in the core network will be described in detail with reference to FIG. 1.

First, the eNodeB 102 is a device supporting next-generation technologies and services such as LTE, such as radio frequency (RF) transmission and reception of signal strength and quality, baseband signal processing, channel card resource management, and the like. A device that performs a function.

The Serving-GW (SGW) 108 is a session control and user plane node that processes payload traffic according to the established session. It interworks with U interface and supports Inter LTE / 3GPP handover, sets up the packet data network gateway (PDN-GW: PGW) 110 and EPS bearer and uses PDU (Tunneling) Packet Data Unit) is delivered.

The packet data network gateway (PDN-GW) 110 allocates the IP of the terminal 100 and serves as a session control and user plane for interworking with an external Internet network and a Non-3GPP network. It maintains network and routing information, and has tunneling and IP routing functions. It also delivers PDUs to the serving gateway 108 and the external network.

The mobility management entity (MME) 106 is a node that manages subscriber information and mobility of the terminal 100 and is responsible for session management, idle subscriber management, paging, and subscriber authentication functions. . That is, the mobility management entity 106 processes the control signal when there is a join request or a radio bearer setup request from the terminal 100 or another network node such as the packet data network gateway 110 or the serving gateway 108. It is responsible for various functions of a control plane, such as, and performs functions such as setting up EPS bearer or IP tunnel and mobility management.

Home Subscriber Server (HSS) 104 is a network node that includes a database containing subscriber information for a wireless communication system. Stored. Policy & Charging Rule Function (PCR) 112 provides dynamic QoS and charging rules according to service data flow to perform communication policy and charging processing in a communication network.

Online Charging Server (OCS) 116 receives the billing information of subscribers who need real-time billing information and provides credit management function such as limit service, and EPC-GW provides packet based on charging information provided by OCS. Create the charging information of the flow. OFCS (OFflineCharging System) 114 collects the billing information generated by the EPC-GW, processes and transmits the billing data required by the billing system (BS). In addition, OFCS 114 provides a unified BS interface by accommodating various billing protocols such as Radius, Diameter, and GTPP.

On the other hand, the packet data network gateway 110 as described above performs a service such as adaptively setting the QoS or billing according to the access network serviced by the terminal, such as WCDMA, WIFI, Internet network, for this purpose, packet data network gateway The RAT-TYPE parameter information, which is information on the type of the access network, must be received from each access network connected to the 110. However, when such RAT-TYPE parameter information is not received according to the access network, the service according to the access network. As described above, there was a problem that cannot be correctly processed.

That is, the packet data network gateway 110 transmits the RAT-TYPE parameter information to the PCRF 112, OFCS 114, or the like in order to apply QoS or charging according to the type of the access network that the terminal 100 receives. Although it should be transmitted to the OCS 116 or the like, when the RAT-TYPE parameter information indicating the type of the access network is not received from the access network, it is difficult to apply the service according to the access network.

Therefore, according to the present invention, the packet data network gateway 110 provides table-specific default RAT-TYPE parameter information for defining the type of the access network according to the interface set with the access network as shown in FIG. 2. The terminal 100 identifies the interface between the service network and the packet data network gateway 110 serviced by the terminal 100, and reads default RAT-TYPE parameter information set for each interface, such as QoS or billing according to the access network. Make the service available.

For example, when the interface with the access network is S5, the packet data network gateway 110 sets the type of the access network serviced by the terminal to EUTRAN with reference to the RAT-TYPE parameter information table for each interface, and the interface with the access network. If the interface is Gn, the access network type can be set to UTRAN by referring to the RAT-TYPE parameter information table for each interface. At this time, in the above example, the example is set to EUTRAN, UTRAN, etc. according to the access network, but as shown in FIG. Can be.

3 illustrates a detailed block configuration of the packet data network gateway 110 according to an embodiment of the present invention. The packet data network gateway 110 of the present invention includes a UE context manager 200 and a packet filter 202. , A user packet tunnel manager 204, a network connection processor 206, and the like.

Hereinafter, the operation of each component of the packet data network gateway 110 of the present invention will be described in detail with reference to FIG. 3.

The UE context manager 200 allocates context management and IP of the terminal 100. The packet filtering unit 202 selects only packets destined for the terminal 100 in the eNodeB 102 currently managed by the packet data network gateway 110 among user data flowing from the external Internet network. The user packet tunnel manager 204 transmits the user packet to the eNodeB 102 through a logical path called a tunnel.

The network access processing unit 206 identifies the interface for the access network accessing the packet data network gateway 110 and accesses it with reference to the RAT-TYPE table as shown in FIG. 2 that stores RAT-TYPE parameter information for each interface. After reading the RAT-TYPE parameter information of the network, the RAT-TYPE parameter information is provided to the PCRF 112, OFCS 114, and OCS 116 so that QoS or billing according to the access network can be applied.

That is, for example, when the interface with the access network is S5, the network connection processing unit 206 of the packet data network gateway 110 refers to the RAT-TYPE parameter information table for each interface, where the terminal 100 is serviced. Type is set to EUTRAN, and when the interface with the access network is Gn, the access network type can be set to UTRAN by referring to the RAT-TYPE parameter information table for each interface.

As described above, in the present invention, a terminal such as an external Internet network or a Non-3GPP network is provided to a packet data network gateway that allocates an IP to the terminal in an EPC network and controls a session for interworking with an external Internet network and a Non-3GPP network. Define the default RAT-TYPE parameter information for each interface with the received access network in advance, and identify the type of the access network defined in the default RAT-TYPE parameter information when requesting access from the access network. Make the service available.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should not be limited by the described embodiments but should be defined by the appended claims.

The present invention provides a packet data network gateway that assigns an IP to a terminal in an EPC network and controls a session for interworking with an external Internet network and a Non-3GPP network. Default RAT-TYPE parameter information for each interface is defined in advance, and when access is requested from the access network, the access network type defined in the default RAT-TYPE parameter information is identified to enable services according to the access network. It can be applied to the LTE mobile communication system.

100: terminal 102: eNodeB
104: HSS 106: MME
108: serving gateway 110: packet data network gateway
112: PCRF 114: OFCS
116: OCS

Claims (6)

An access network to which the terminal is connected,
A packet data network gateway that identifies an interface with an access network to which the terminal is serviced and provides default RAT-TYPE parameter information corresponding to the interface as information on the access network.
Mobile communication system comprising a. The method of claim 1,
The packet data network gateway,
And a table in which preset default RAT-TYPE parameter information for each interface with the access network is recorded. A default RAT-TYPE table for storing default RAT-TYPE parameter information corresponding to an interface with the access network to an access network to which the terminal is connected;
A network access processor that identifies an interface with an access network serviced by the terminal, reads default RAT-TYPE parameter information corresponding to the interface from the default RAT-TYPE table, and provides the information on the access network.
Packet data network gateway comprising a. The method of claim 3, wherein
The default RAT-TYPE parameter information is
The packet data network gateway according to the access network is set to EUTRAN, UTRAN, GERAN, WLAN, GAN or HSPA Evolution by default. The method of claim 3, wherein
The access network,
Packet data network gateway, characterized in that the WCDMA network, LTE network, WIFI network or the Internet. Storing default RAT-TYPE parameter information corresponding to an interface with the access network for the access network to which the terminal is connected;
Receiving, by the terminal, an access request from a serviced access network;
Identifying an interface with the access network and reading default RAT-TYPE parameter information set for the interface;
Providing the default RAT-TYPE parameter information as information on the access network.
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