Method of integration network element on communication system

Method of integration network element on communication system

1 shows a conventional 3GPP2 (3<sp>rd</sp> Generation Partnership Projects-2) Network configuration example.

2 is an exemplary configuration diagram of a 3GPP2 integrated Internet protocol (ALL-IP) network to which the present invention is applied.

3 is an exemplary diagram of a protocol configuration of a packet control function (PCF) having a mobile IP external agent (FA) function according to the present invention;

4 is a flowchart illustrating a call processing procedure for a network element integration method according to an embodiment of the present invention;

*Explanation of symbols for main parts of the drawing

201 : Wireless Access Gateway (WAG) 202 : Authorization/Authentication/Accounting (AAA) Security Manager

203 : Home Location Register (HLR) 204 : Existing service support function

205 : Location server 206 : Media gateway device

207 : Media gateway device control function unit 208: Media resource function unit

209 : Mobile IP Home Agent 210 : Mobility Manager

211 : Policy Manager 212 : Resource Manager

213 : Roaming signal gateway device 214 : Service creation environment function part

215 : service manager 216 : session manager

217 : Relay signal gateway device 218 : Home subscriber server

<backgroundart><p>The present invention is 3GPP2 (3<sp>rd</sp> Generation Partnership Projects-2) In order to provide efficient network structure and data service functions in integrated Internet Protocol (ALL-IP) networks based on next-generation mobile communication networks such as IMT-2000 (International Mobile Telecommunication) and UMTS (Universal Mobile Telecommunication Service) A method for integrating network elements for integrating and accommodating network elements such as a Packet Control Function (PCF) and a Packet Data Serving Node (PDSN) function and a computer readable program for realizing the method It relates to a recordable medium. </p><p>1 shows a conventional 3GPP2 (3<sp>rd</sp> Generation Partnership Projects-2) is an exemplary diagram of the network configuration. </p><p>The radio access network (RAN) 12 is composed of a base station controller (BSC (Base Station Controller), PCF) and a base station (BTS: Base station Transceiver Subsystem), and a visitor location register (VLR: Visitor Location Register) ( 13) and a Home Location Register (HLR) 14 provide mobility management and authentication of a mobile terminal (MS: Mobile Station) 11 . </p><p>When the basic authentication of the data call is completed, the radio access network (RAN) 12 establishes a virtual connection to the packet data service node (PDSN) 16 and the Generic Routing Encapsulation (GRE) protocol. </p><p>The packet data service node (PDSN) 16 establishes a point-to-point protocol (PPP) connection with the mobile terminal (MS) 11, and establishes a remote authentication dial-in user service (RADIUS: Remote Authentication Dial In) User Service) through the server, subscriber authentication and billing information are delivered. </p><p>When providing the mobile IP service, the packet data service node (PDSN) 16 performs a foreign agent (FA) function, and a home agent (HA: Home Agent) 15 that exists in the home network of the mobile terminal IP address. ) performs functions such as location information management and tunnel setting for mobile IP.</p><p>As such, the conventional packet control function (PCF) is an interworking system of a radio access network (RAN) 12 for interworking with a packet network, and a packet data service node (PDSN) 16 is a radio access network (RAN) ( 12), it functions as an access node to connect data subscribers to the packet network, so that the RAN 12 and the packet network are completely separated. </p><p>However, in the future, the 3GPP2 network or ALL-IP network tends to evolve into one IP network, and the existing base station controller (BSC), packet control function (PCF), and packet data service node (PDSN) are connected to one radio connection. It is viewed as a system called a gateway device (WAG: Wireless Access Gateway). Accordingly, as the access nodes of data subscribers are integrated into one wireless access gateway (WAG), the trend is gradually moving to a lower level of the network.</p><p>In particular, in the IMT-2000 network and the All-IP network structure, which is being standardized in 3GPP2, as shown in FIGS. 1 and 2, the packet control function (PCF) and the packet data service node (PDSN) systems are independent systems, respectively. exist. </p><p>The packet control function (PCF) may exist inside the base station controller (BSC) system or may be implemented as a separate system externally, but most developers are implementing it as an independent system to provide effective mobility in the mobile network.</p><p>The packet control function (PCF) is a radio access network (RAN) called "RP Interface" to connect the data of the mobile terminal (MS) transmitted from the radio access network (RAN) to the packet data service node (PDSN). It uses the packet data network (PDN) connection method, and tunneling (Virtual Link Connection) for each subscriber for data transmission in the RP connection and GRE protocol encapsulation and decapsulation through GRE protocol encapsulation and decapsulation. Tunneling) function is provided. In addition, a temporary storage (Buffer) function and packet division ( segmentation) function.</p><p>The Packet Data Service Node (PDSN) performs PPP/GRE protocol processing to process packets received from the Packet Control Function (PCF). In this case, when the packet control function (PCF) and the packet data service node (PDSN) exist as different systems, the following problems occur.</p><p>First, the transmission delay in the transmission of user packets of the mobile terminal (MS) is increased compared to the integrated system. This is because each time it goes through the network element, it goes through the store and forward process.</p><p>Second, it is inefficiency of data transmission due to header overlap of GRE/PPP in RP connection. In particular, in the process of evolving to IPv6 (HA) in the future, when the end of the connection layer of the mobile terminal (MS) is in the packet data service node (PDSN), the RP connection must adhere to the tunneling method of IPv4 (GFA). Therefore, it is reasonable to process the connection layer protocol of the mobile terminal (MS) of the packet data service node (PDSN) in the packet control function (PCF) in the future evolution to IPv6.</p><p>As described above, in the 3GPP2 IMT-2000 network, a packet control function (PCF) was required in the radio access network (RAN) to interwork the radio access network (RAN) and the IP network, and in the IP network, the packet data service node (PDSN) was requested Therefore, in order to provide an efficient network structure and data service function in the IMT-2000 network and the ALL-IP network, a method that can integrate the packet control function (PCF) and the packet data service node (PDSN) function is essential. .</p></backgroundart><abstractproblem><p>The present invention has been proposed to meet the above-mentioned needs, and in order to provide an efficient network structure and data service function in an integrated Internet Protocol (ALL-IP) network based on a next-generation mobile communication network, a packet control function (PCF) and a packet An object of the present invention is to provide a method for integrating network elements for integrating and accommodating network elements such as a data service node (PDSN) function, and a computer-readable recording medium recording a program for realizing the same. </p></abstractproblem>

<p>In order to achieve the above object, the present invention provides a packet control function (PCF) for interworking a radio access network (RAN) with a packet network in a network element integration method in an integrated Internet protocol (ALL-IP) network based on a next-generation mobile communication network. and a packet data service node (PDSN) function that functions as an access node for connecting data subscribers accessed through the radio access network (RAN) to the packet network into one, but mobile Internet protocol ( When providing IP) service, it is characterized in that the packet data service node (PDSN)'s Mobile Internet Protocol (IP) external agent (FA) function and the link layer termination function of the mobile terminal are integrated into the packet control function (PCF). do.</p><p>The present invention for achieving the above object includes a packet control function (PCF) for interworking a radio access network (RAN) with a packet network in a next-generation mobile communication network-based integrated Internet protocol (ALL-IP) system having a processor; A packet data service node (PDSN) function that functions as an access node for connecting data subscribers accessed through a radio access network (RAN) to the packet network is integrated into one, but mobile Internet protocol (IP) service When provided, a program for realizing a function of integrating and accommodating the Mobile Internet Protocol (IP) External Agent (FA) function of the Packet Data Service Node (PDSN) and the Link Layer terminating function of the mobile terminal in the packet control function (PCF) A computer-readable recording medium is provided.</p><p>The present invention relates to the mobile IP external agent (FA) function of the PDSN and the link layer of the mobile terminal (MS) to the PCF in a system of a separate type of the existing packet control function (PCF) and packet data service node (PDSN) functions. ) by accommodating the termination function to facilitate network configuration when evolving to an ALL-IP network in the future and to reduce data transmission delay so that effective mobile communication data service can be provided. </p><p>The above object, features and advantages will become more apparent through the following detailed description in conjunction with the accompanying drawings. Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings.</p><p>2 is an exemplary configuration diagram of a 3GPP2 integrated Internet protocol (ALL-IP) network to which the present invention is applied.</p><p>The wireless access gateway device (WAG) 201 is for interworking the existing base station controller (BSC), packet control function (PCF), packet data service node (PDSN) functions, etc. into one system, and includes a wireless controller, voice and data gate functions, etc. </p><p>The base station controller (BSC) controls and manages one or more base stations (BTS), and performs traffic and signaling related to call processing, mobility management, and mobile terminal (MS) management. A radio access network (RAN) consists of a base station controller (BSC) and a base station (BTS).</p><p>The packet control function (PCF) may exist inside the base station controller (BSC) system or may be implemented as a separate system externally, and transmits the data of the mobile terminal (MS) transmitted from the radio access network (RAN) to the packet data service node ( PDSN). </p><p>The packet data service node (PDSN) performs the function of an external agent (FA), delivers incoming and outgoing packets for packet data of the mobile terminal (MS) to an appropriate path, and sets and manages the connection layer protocol of the mobile terminal (MS) perform the terminating role.</p><p>Authorization Authentication Accounting (AAA) The security manager 202 provides an Internet protocol function supporting authentication, authorization, and accounting functions.</p><p>The home location register (HLR) 203 has information such as subscriber information, IP priority, and whether or not resources and authority for interdomain services are used.</p><p>The Legacy Support function unit 204 manages functions such as call processing, mobility management, resource management, security management, and service management provided in the existing circuit-based wireless network.</p><p>The location server (Location Server) 205 has a function such as location information, a mobile location center, and a function of interworking with a Position Determination Equipment (PDE).</p><p>The media gateway 206 performs functions such as protocol and address translation when user data is transmitted to a public data network or another network.</p><p>The Media Gateway Control Function 207 controls and manages the media gateway devices 206 .</p><p>The Media Resource Function 208 performs a management function of allocating/releasing resources of the media gateway devices 206 . </p><p>The Mobile IP Home Agent 209 manages the IP address of an external agent in a table as location information for the mobile IP, and provides a function of delivering transmission data to the subscriber through tunnel and encryption if necessary. carry out</p><p>The mobility manager 210 performs a handoff management function between the wireless access gateway devices 201 or between networks.</p><p>The Policy Manager 211 manages policy data and rules, and allows interaction with various policies. </p><p>The resource manager 212 performs a function of managing resources necessary to provide services to network users.</p><p>The roaming signaling gateway 213 performs a function of converting packet signals into a signal method of a circuit-switched network or a signaling method of a circuit-switched network into packet signals.</p><p>The service creation environment function unit 214 provides an environment for creating new services and application services to the operator.</p><p>The service manager 215 manages network authentication and all voice and data service logics.</p><p>The session manager 216 establishes and manages sessions, states, and handoffs through various networks.</p><p>Trunk Signaling Gateway 217 performs a function of converting the signaling method of the public switched telephone network (PSTN) and the signaling method of the core network.</p><p>The Home Subscriber Server (HSS) 218 includes at least network elements such as AAA, HLR, EIR, LOC, and UMS. </p><p>An Equipment Identity Register (EIR) is a database (DB) for device information. </p><p>The location-related information DB (LOC) provides location-related information requested by the location server 205 . </p><p>Policy Repository stores subscriber data, multimedia usage policy, service quality, effective time and route, etc.</p><p>The protocol structure for accommodating the Mobile IP External Agent (FA) function of the Packet Data Service Node (PDSN) to the Packet Control Function (PCF) is shown in FIG. 3 . </p><p>Referring to FIG. 3 , a User Datagram Protocol (UDP) processing unit 304, an Internet Protocol (IP) processing unit 305, an Internet Protocol encryption (IPsec) unit 309, an end-to-end protocol ( The PPP: Point to Point Protocol) processing unit 306 follows the rules set by the Internet Engineer Task Force (IETF), and the Link Layer 307 is an Asynchronous Transfer Mode or Ethernet.</p><p>The base station controller interworking signal processing unit 301 processes various signals related to data call-related call processing and resource management received from the base station controller (BSC).</p><p>The authorization/authentication/charging (AAA) protocol client processing unit 302 performs authentication for access to the IP network of the mobile terminal (MS) through the authorization/authentication/charging protocol, and performs authorization/authentication/charging information generated in the system. It performs a function of passing to the charging (AAA) security manager 202 .</p><p>The mobile IP external agent function processing unit 303 is a functional block that processes messages related to the mobile terminal (MS) and the mobile IP, and manages the visitor list.</p><p>Looking at the main functions of the packet control function (PCF) accommodating the mobile IP external agent (FA) function of the packet data service node (PDSN), the dormant function for packet data service and call setup with the base station controller (BSC) Processes existing packet control functions (PCF), such as functions, temporary storage of user packets, PPP packet division/combination function, mobile IP external agent function, IP in IP processing function, IP encryption function, IP address assignment function, route It provides the functions of the existing Packet Data Service Node (PDSN), such as assignment and mobile IP message processing functions, remote authentication dial-up user service (RADIUS) or DIAMETER client functions. However, the existing RP connection signal processing is not performed.</p><p>Looking at the process in which packets are transmitted and processed, packets received from the base station controller (BSC) are combined, if necessary, into a complete end-to-end protocol (PPP) frame, and after PPP processing, the IP packets of the mobile terminal (MS) is transmitted to the IP network according to the general routing method. Then, the packet received from the IP network is made into a PPP frame and then divided and transmitted according to the size of the radio link protocol of the wireless network.</p><p>Here, IP packets transmitted to the network are delivered to the next node along a path determined by a routing protocol.</p><p>4 is a flowchart illustrating a call processing procedure for a network element integration method according to the present invention. In order to provide an efficient network structure and data service function, a packet data service node (PDSN) function is provided to a packet control function (PCF). It shows the procedure for integrating and accommodating network elements such as </p><p>First, the packet control function (PCF) accommodating the mobile IP external agent (FA) function of the PDSN performs a call processing function for establishing a data transmission path with the base station controller (BSC) in the base station controller interworking signal processing unit 301 to perform a base station A data connection between the controller (BSC) and the packet data service node (PDSN) having the functions of the packet processing node is initialized (401). </p><p>Thereafter, the end-to-end protocol processing unit 306 negotiates an end-to-end protocol (PPP) with the mobile terminal MS through a set data path from the mobile terminal MS to the packet processor (402). In this case, when a simple IP service is provided, subscriber authentication is performed through the authorization/authentication/accounting (AAA) protocol client processing unit 302 in the PPP negotiation process and, if necessary, an IP address is assigned.</p><p>Next, after PPP or other connection layer protocol setting is completed, when a mobile IP message is received from the mobile terminal (MS) (403), subscriber authentication is processed using AAA and RADIUS or DIAMETER protocols (404). </p><p>Next, the mobile IP external agent function processing unit 303 performs the following functions as an external agent defined in IETF RFC 2002 and TIA/EIA/IS-835. That is, the mobile IP registration message received from the mobile terminal (MS) is transferred to the mobile IP home agent 209 (405), the location of the mobile terminal (MS) is registered, and a response is sent to the mobile IP home agent (209). It is received from (406) and transmitted to the mobile terminal (MS). In addition, the mobile IP external agent function processing unit 303 establishes tunneling with the mobile IP home agent 209 and, if necessary, sets IP encryption.</p><p>When the mobile IP registration is completed in this way, packets transmitted and received with the mobile terminal MS are processed (step 408).</p><p>The present invention described above is capable of various substitutions, modifications and changes within the scope without departing from the technical spirit of the present invention for those of ordinary skill in the art to which the present invention pertains. It is not limited to the drawings. </p>

<p>The present invention as described above has the following effects compared to the conventional configuration in which the PCF and the PDSN are separated. </p><p>First, since the RP connection between the PCF and the PDSN disappears, the establishment of a virtual link is unnecessary, and there is no need to use the GRE protocol. </p><p>Second, the GRE/PPP overhead on the RP connection is eliminated, so the traffic load of the network is reduced, and the data transmission delay is reduced as the two network elements are integrated into one.</p><p>Third, IPv6 acceptance is easy in the future, and in the existing case, all packets are delivered through PDSN unconditionally, so both PCF and PDSN have the burden of packet processing. Because it can be routed, it brings a dispersion effect in data transmission.</p><p>Fourth, it also conforms to the technical trend of downgrading the FA function of 3GPP2 to RAN.</p>