KR20060039563A - Method for providing handover of packet data service on portable internet network to mobile communication network - Google Patents

Abstract

The present invention relates to a method for handover a call using a packet data service in a mobile Internet network to a mobile communication network.

In order to achieve this object, the present invention comprises the steps of: (a) measuring the strength of the signal received from the portable Internet network through the composite terminal; (b) collecting information on a target mobile communication network to perform handover in the portable Internet network; (c) providing a handover message and information on the target mobile communication network from the portable Internet network to the composite terminal; (d) performing synchronization with the target mobile communication network in the composite terminal; (e) Checking the IP used in the target mobile communication network, if the IP used in the target mobile communication network is a static IP, assigning a new IP, and if the IP used in the target mobile communication network is the Mobile IP, perform the IP movement process. Performing; And (f) handing over the packet data service from the portable Internet network to the target mobile communication network.

According to the present invention, when the user leaves the portable Internet network, the case where the packet data service is forcibly terminated disappears, and thus, the trouble of manipulating the composite terminal to receive the packet data service is eliminated.

Portable Internet Network, Handover, Composite Terminal, Packet Data, WIPI

Description

Method for Providing Handover of Packet Data Service on Portable Internet Network to Mobile Communication Network}

1 is a diagram schematically illustrating a system for handing over a packet data service in a mobile Internet network to a mobile communication network according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a method for handing over a packet data service to a mobile communication network in a portable Internet network using Static IP according to a preferred embodiment of the present invention.

3 is a flowchart illustrating a method for handing over a packet data service to a mobile communication network in a mobile Internet network using Mobile IP according to a preferred embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

110: composite terminal 120: mobile Internet service area

122: radio access station 124: access control router

130: IP network 140: CDMA service area

142: base station transmitter 144: base station controller

146 mobile communication switching center 148 HLR                 

150: packet data serving node 160: mobile communication IP network

170: home agent 180: authentication server

The present invention relates to a method for handover a call using a packet data service in a mobile Internet network to a mobile communication network. More specifically, when the terminal located in the portable internet network leaves the portable internet service area while receiving the packet data service, the packet of the portable internet network can continue to receive the packet data service through the mobile communication network that manages the area. The present invention relates to a method for handing over a data service to a mobile communication network.

As the electronic and communication technologies have made rapid progress, various wireless communication services using wireless networks have been provided. The most basic wireless communication service is a wireless voice call service that provides voice communication to mobile terminal users regardless of time and place. In addition, while providing a text message service to complement the voice call service, a wireless Internet service has recently emerged to provide an Internet communication service to a user of a mobile communication terminal through a wireless communication network. As such, the services provided by the mobile communication system are being expanded not only to voice services but also to multimedia communication services that transmit circuit data, packet data, and the like.                         

In order to provide such a service, a mobile communication service is an analog cellular advanced mobile phone system (AMPS) of a first generation mobile communication service, a digital cellular system of GSM (Global System for Mobile) and a CDMA of a second generation mobile communication service. Code Division Multiple Access (PCD), which has developed into a Personal Communication Service (PCS), a 2.5th generation mobile communication service, and recently, the International Mobile Telecommunication 2000, a third generation mobile communication service that has recently been standardized by ITU-R. ) Is commercially available.

IMT-2000 is proposed by the 3GPP (Generation Partnership Project) as the main asynchronous WCDMA (Wideband CDMA) system and 3GPP2 as the main axis of the proposed synchronous CDMA-2000 (for example, CDMA 2000 1X, 3X, EV-DO, etc.) The system is classified and provided.

The wireless access technology and mobile communication technology of the CDMA-2000 system are based on the CDMA method. Therefore, since it has backward compatibility with the existing second generation IS-95 network, it is possible to provide a mobile communication service using both second and third generation communication networks. In addition, a mobile Internet Protocol (IP) function similar to a handoff of a voice call may be supported, and a roaming service using a removable user identity module (R-UIM) card may be provided.

WCDMA system uses the CDMA method for wireless access technology, but mobile communication network technology is based on GSM network technology. WCDMA communication method is suitable for high speed data transmission because it widens the frequency bandwidth to 5 MHz and has a data transmission speed of 2 Mbps. Diversity due to backward call quality that cannot be provided by the IS-95 and GSM methods Diversity provides good call and data transmission performance even in poor communication environments.

As WCDMA communication is adopted by most countries and continues to develop technical specifications for WCDMA in 3GPP, WCDMA is also available in countries such as Korea, the United States, and China, which basically provide CDMA-2000 services. The network began to provide WCDMA services.

On the other hand, as the wireless Internet service is activated, the demand for using the high-speed wireless Internet service is increasing rapidly in the mobile communication environment. However, the existing mobile communication system has a limitation in providing high-speed wireless Internet due to a high base station construction cost and high usage rate of the wireless Internet, and a small screen of the terminal, which limits the available content. Accordingly, a high-speed portable Internet (WiBro: Wireless Broadband or HPi: High-Speed Portable internet) system, which guarantees portability and mobility and can use a wireless Internet service at a low price, has emerged.

The portable internet system uses various types of portable communication terminals such as laptops, PDAs, and handheld PCs to access the Internet in indoor and outdoor stationary environments and in mobile environments with walking speeds and low to medium speeds. It is a possible service. In addition, the portable Internet system provides mobility of 60 km / h per hour, and has a downlink transmission rate of 24.8 Mbps but an uplink transmission rate of 5.2 Mbps, which is an IP (Internet Protocol) based wireless data communication system having asymmetric transmission characteristics.

The portable Internet system uses the 2.3 GHz frequency band and uses Time Division Duplex (TDD) for Duplex and Orthogonal Frequency Division for Multiple Access for OFDM to effectively use the allocated frequency spectrum. Multiple Access (TDMA) / Time Division Multiple Access (TDMA) is used.

On the other hand, the portable Internet system includes different components, each of which is different due to a difference in service speed from a CDMA system and a WCDMA system, mainly due to a difference between packet data and circuit data. Therefore, when providing at least one communication service of portable Internet, CDMA, and WCDMA in a certain area at the same time, the area must include all systems supporting each service.

In addition, in order to receive a desired service among one or more communication services provided in a certain region, the terminal must have a modem capable of receiving the corresponding service. Since a conventional terminal has a modem that can receive only one of the services of the portable Internet, CDMA, and WCDMA, an area in which a mobile communication service is not received may occur according to a service providing system of each region. In order to solve such a problem, a multi-terminal (MM-MB: Multi Mode-Multi Band) terminal is used in a region where two or more modems are provided to provide a service using another modem.

However, at present, when a user who receives packet data from a portable Internet system using a composite terminal leaves a portable Internet support cell, that is, moves to a CDMA system or a WCDMA system, the packet data service is not interrupted. There is no procedure for providing handover.

Therefore, once the user leaves the cellular Internet support cell, the packet data service provided through the portable Internet system is once stopped, and the user must access the CDMA system or the WCDMA system again by key manipulation and then receive the packet data service again. It has the inconvenience of going through a complicated process.

In order to solve this problem, the present invention, if the terminal located in the mobile Internet network is out of the mobile Internet service area while receiving the packet data service, so that the packet data service can continue to be provided through the mobile communication network that manages the area. An object of the present invention is to provide a method for handing over a packet data service of a portable Internet network to a mobile communication network.

In order to achieve the above object, the present invention provides a composite terminal for a packet data service when a composite terminal, which has been provided with a packet data service in a portable internet network, leaves a service region of the portable internet network and enters a service region of another mobile communication network. A method for handing over to a target mobile communication network, wherein the method comprises: (a) measuring the strength of a signal received from a portable Internet network through a composite terminal; (b) collecting information on a target mobile communication network to perform handover in the portable Internet network when the strength of the signal received by the composite terminal is less than or equal to a preset value; (c) providing a handover message and information on the target mobile communication network from the portable Internet network to the composite terminal; (d) performing synchronization with the target mobile communication network in the composite terminal by using the information of the target mobile communication network; (e) Check whether the IP used in the target mobile communication network is a static IP or a mobile IP, if the IP used in the target mobile communication network is a static IP, perform a process of allocating a new IP, and the IP used in the target mobile communication network. If IP is Mobile IP, performing an IP movement process; And (f) handing over the packet data service from the portable internet network to the target mobile communication network.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

1 is a diagram schematically showing a system for handing over a packet data service in a portable Internet network to a mobile communication network according to a preferred embodiment of the present invention.

The portable Internet service system providing packet data service includes a composite terminal 110, a radio access station (RAS) 122, an access control router (ACR). ACR '124), IP network 130, home agent (HA: Home Agent, hereinafter' HA ') 170 and authentication server (AAA: Authentication, Authorization, Accounting, hereinafter' AAA ' 180).

The composite terminal 110 is an MM-MB terminal including two or more modems to support two or more systems, and receives a packet data service from a portable internet network using a portable internet modem, and moves according to the present invention. When handing over to a communication network, a packet data service and a circuit data service are provided through a mobile communication network using a mobile communication modem. In general, when using a modem for mobile communication, a modem for a portable Internet is not used, and a modem for a mobile communication is not used when a modem for a portable internet is used. However, it is also possible to use both a mobile communication modem and a portable internet modem.

The RAS 122 is a base station of a portable Internet network. The RAS 122 wirelessly transmits data received from the ACR 124 to the composite terminal 110 located in the portable Internet service area 120 managed by the RAS 122. / IF module and controller function, OFDMA / TDD packet scheduling and channel multiplexing function, MAC frame variable control function according to service characteristics and propagation environment, 50 Mbps high-speed traffic real-time control function and handover function according to the present invention. In addition, the composite terminal 110 and the RAS 122 has a 50 Mbps packet transmission modulation and demodulation function, a high speed packet channel coding function, a real time modem control function, and the like for data transmission.

The ACR 124 is a packet access router that accommodates a plurality of RAS 122 and connects the RAS 122 with each other, handover control function between the RAS 122, handover function between the ACR 124, packet routing function, It has an internet connection function and the like, and is connected to the IP network 130.

The IP network 130 is connected to the HA 170 and the AAA 180 and receives the packet data from an external packet data service such as the Internet network and transmits the packet data to the ACR 124.

When transmitting data to the composite terminal 210, the HA 170 performs routing for transmitting data transmitted from the outside when using Mobile IP, and the AAA 180 is used in the composite terminal 110. It performs charging for data and performs a function of authenticating a connection from the composite terminal 110.

The mobile communication network performing the handover according to the present invention through interworking with the portable Internet network may be various networks such as CDMA 2000 1X network, 1x EV-DO network, 1x EV-DV network, WCDMA network, HSDPA network. Here, the CDMA 2000 1X network, the 1x EV-DO network, and the 1x EV-DV network are similar in terms of service, and the WCDMA and HSDPA networks are similar in service. Herein, a description will be made based on the CDMA2000 1X network. For convenience of description, the CDMA 2000 1X network will be referred to as a CDMA network, and the CDMA 2000 1X system will be referred to as a CDMA system.

A CDMA system for performing a handover according to the present invention includes a base station transmitter 142, a base station controller 144, a mobile communication switching center 146, and a home location register (HLR) (hereinafter referred to as 'HLR'). ), A Packet Data Serving Node (PDSN) 150, a mobile communication IP network 160, an HA 270, and an AAA 180.

The base station transmitter 142 is a location for determining the location of the composite terminal 110 located in the CDMA service area 140 that is arranged in a cell unit and enters the CDMA service area 140. A network endpoint device that performs registration and directly connects to the composite terminal 110 by performing baseband signal processing, wired / wireless conversion, and wireless signal transmission and reception.

The base station controller 144 controls the transmission output of the base station transmitter 142, determines soft handoff and hard handoff between cells, transcoding and vocoding, GPS clock distribution, operation and maintenance for the base station. Perform the maintenance function. In addition, the base station controller 144 transmits subscriber information of the location-registered composite terminal 110 to the mobile switching center 146, and transmits a call request signal and a data request signal from the mobile switching center 146 to the base station transmitter 142. It serves as a). In addition, the base station controller 144 is connected to the PDSN 150 to transmit and receive packet data and provide a wireless Internet service to the composite terminal 110.

The mobile communication switching center 146 performs basic and additional service processing, incoming and outgoing call processing of subscribers, data signal processing, location registration procedure and handoff processing, interworking functions with other networks, and the like.

The HLR 148 performs functions such as registration recognition, registration deletion, and location checking of the composite terminal 110. In addition, when the location information request signal for the data transmission request from the mobile communication IP network 160 to the composite terminal 110 to be described later is transmitted, the HLR 148 searches for a database that is stored in the composite terminal 110. The base station controller 144 and the base station transmitter 142 information of the located area is transmitted to the mobile communication IP network 160. That is, the response signal transmitted by the HLR 148 to the mobile communication IP network 160 in response to the location information request signal includes the address information of the base station transmitter 142.

The PDSN 150 performs a function of providing a data service to the composite terminal 110. The PDSN 150 is an evolution of an inter-working function (IWF) used to support data communication in a 2nd generation (2G) mobile communication system.

The mobile communication IP network 160 inquires the location information of the composite terminal 110 to transmit data, checks the address information of the base station transmitter 142 in charge of the area where the composite terminal 110 is located, and establishes a session request signal. A network termination device that transmits The session establishment request signal is transmitted from the PDSN 150 to the composite terminal 110, and the composite terminal 110 that receives the session establishment request signal establishes a session with the PDSN 150. Here, in transmitting the session establishment request signal to the composite terminal 110, a process of calling the composite terminal 110 using the paging channel in the base station transmitter 142 is required. At this time, the base station transmitter 142 transmits a paging message as a message for calling. The paging message is a message for notifying the mobile terminal 110 that there is a call connection request, and is a message transmitted through a paging channel among wireless channels.

The mobile communication IP network 160 is connected to the IP network 130, the HA 170, and the AAA 180 of the portable Internet network through a router.

2 is a flowchart illustrating a method of handing over a packet data service to a mobile communication network in a mobile Internet network using a static IP according to a preferred embodiment of the present invention.

When a user located in the portable Internet service area 120 requests a packet data service to the portable Internet network by operating a key input unit of the composite terminal 110, the composite terminal 110 sets packet data through a session establishment with the RAS 122. Provide a service (S202).

In this process, the portable Internet network requests signal strength information for handover to the composite terminal 110, and the composite terminal 110 measures the strength of the signal received from the RAS 122 according to the request (S204). When the composite terminal 110 measuring the signal strength moves to the outside of the portable Internet service area 120, the signal received from the RAS 122 is weakened. When the composite terminal 110 is almost out of the portable Internet service area 120, and the signal received from the RAS 122 falls below a preset value, the composite terminal 110 indicates that the signal strength is less than or equal to a predetermined value. The transmission is made to the portable Internet network (S206).

At this time, the composite terminal 110 may search for information on the mobile communication network (hereinafter, referred to as a "target network") to be handed over (S208). If the composite terminal 110 can search for the target network, the composite terminal 110 can provide information about the target network (for example, the type of the target network (CDMA 2000 1X network, 1x EV-DO network, 1x EV-). DV network, WCDMA network, HSDPA network), system ID (base station transmitter ID) of target network, type of IP used by target network (Static IP, Mobile IP, etc.) The information and the strength of the received signal are transmitted to the portable Internet network (S212).

Here, if the composite terminal 110 cannot search for target network information to be handed over, the portable Internet network searches for information on the target network. In addition, the portable Internet network receives the signal strength information from the composite terminal 110 (S214).

When the information on the target network is collected through the step S212 or S214, the portable Internet network interworking with the target network to prepare for handover between the networks (S216), and provides the handover message and the target network information to the composite terminal 110. In this case, when the target network information is collected by the composite terminal 110 in step S212, the portable Internet network may be set to transmit only the handover message without providing the target network information to the composite terminal 110 (S218). ).

Upon receiving the handover message and the target network information from the portable Internet network, the hybrid terminal 110 requests a handover to the target network and performs synchronization with the target network (S220).

The composite terminal 1110 checks whether the type of IP used in the target network is a static IP or a mobile IP. The type of IP used in the target network uses the information identified in step S212 or step S214 (S222).

As a result of confirming the IP type, if the target network is a synchronous network or asynchronous network using static IP, the composite terminal 110 performs a new static IP connection or a point-to-point protocol (PPP) connection to the target network. A new IP is assigned (S224). The wireless Internet platform (WIPI: Wireless Internet Platform for Interoperability, hereinafter referred to as 'WIPI') mounted on the composite terminal 110 ready to receive packet data through new IP allocation is newly connected rather than a portable Internet network. It is recognized that a packet data service is provided through a mobile communication network. Thereafter, the composite terminal 110 receives a packet data service from the mobile communication network through the WIPI.

At this time, during handover from the portable Internet network to the mobile communication network, the WIPI may display a message “Network switching” or “Handover in progress” when a new traffic request is transmitted from the user. In addition, a real-time traffic service provided through the portable Internet network, for example, a TV service, may be temporarily interrupted during handover. In this case, the target network is handed over to the target network and connected to a TV service access menu, or It is also possible to set up so that the TV service through the (S226).

On the other hand, as a result of confirming the IP type through the step S222, if the target network is a synchronous network using Mobile IP, the composite terminal 110 performs an IP migration procedure for setting the IP used in the mobile Internet network to the IP in the mobile communication network It performs (S228).

The WIPI mounted on the composite terminal 110 ready to receive packet data through the moved IP recognizes that the handover from the portable Internet network to the mobile network is completed, and then the composite terminal 110 moves through the WIPI. Receive packet data service from the network.

At this time, during the handover from the portable Internet network to the mobile communication network as in step S226, the WIPI may display a message “Network switching” or “Handover in progress” when a new traffic request is transmitted from the user. However, in the case of the real-time traffic service, the packet data service is not interrupted and terminated, but is temporarily stopped. In this case, as soon as the handover is completed, the real-time traffic service continues through the playback program (S230).                     

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, due to a disadvantage in that the packet data service cannot be provided when the user moves out of the portable Internet network to the mobile communication network, the packet data service provided only when the user is located in the portable Internet network is moved. As the handover to the communication network becomes possible, when the user leaves the portable Internet network, the packet data service is forcibly terminated, thereby eliminating the trouble of manipulating the composite terminal to receive the packet data service again.

Claims (13)

When the hybrid terminal that received the packet data service in the portable Internet network leaves the service area of the portable Internet network and enters a service area of another mobile communication network, the packet data service is transferred to the target mobile communication network where the composite terminal enters. In the way to over, (a) measuring the strength of a signal received from the portable Internet network through the composite terminal; (b) collecting information on the target mobile communication network to perform the handover in the portable internet network when the strength of the signal received by the composite terminal is less than or equal to a preset value; (c) providing a handover message and information on the target mobile communication network from the portable Internet network to the composite terminal; (d) performing synchronization with the target mobile communication network in the composite terminal by using the information of the target mobile communication network; (e) checking whether the IP used in the target mobile communication network is a static IP or a mobile IP, and if the IP used in the target mobile communication network is the static IP, allocating a new IP; Performing an IP movement process if the IP used in the mobile IP is mobile IP; And (f) handing over the packet data service from the portable Internet network to the target mobile communication network; A method for handing over a packet data service of a portable internet network to a mobile communication network comprising a. The method of claim 1, wherein step (a) comprises: The composite terminal measures the strength of a signal received from a RAS (Radio Access Station) of the portable Internet network, and transmits the packet data service of the portable Internet network to the RAS. How to handover to a mobile network. The method of claim 1, wherein step (a) comprises: Only when the strength of the signal measured by the composite terminal falls below a predetermined value, the composite terminal transmits the strength value of the measured signal to the portable internet network. To handover to a mobile communication network. The method of claim 3, wherein the preset value is And a method of handovering a packet data service of a portable internet network to a mobile communication network, wherein the composite terminal is a value of a signal measured when the composite terminal is almost out of a service area of the portable internet. The method of claim 1, wherein step (b) comprises: After collecting the information of the mobile communication network to perform the handover through the composite terminal, and transmits the collected information to the portable Internet network, or information of the target mobile communication network to perform the handover directly from the portable Internet network And handing over the packet data service of the portable internet network to the mobile communication network. The method of claim 1, wherein in step (b), The information on the target mobile communication network includes a type of the target mobile communication network (CDMA 2000 1X network, 1x EV-DO network, 1x EV-DV network, WCDMA network, HSDPA network), and a system ID of the target mobile communication network (ID of a base station transmitter). And a type of IP used by the target mobile communication network (Static IP, Mobile IP). The method of claim 1, wherein step (e) If the IP used in the target mobile communication network is the static IP, a new IP is allocated to the target mobile communication network or a new IP is assigned through a Point-to-Point Protocol (PPP) connection. To hand over a packet data service to a mobile communication network. The method of claim 7, wherein the target mobile communication network, A method of handovering a packet data service of a portable internet network to a mobile communication network, characterized in that the synchronous network or the asynchronous network using the static IP. The method of claim 1, wherein step (f) comprises: During the handover, when a new traffic service request is delivered from the user of the multi-composite terminal, a message of 'network switching' or 'handover' is displayed through a wireless internet platform (WIPI: Wireless Internet Platform for Interoperability). A method of handing over a packet data service of a portable Internet network to a mobile communication network. The method of claim 1, wherein step (f) In the case where the new IP is allocated and handed over in step (e), the connection of the provided real-time traffic service is disconnected, and after the handover, the portable menu is connected to an access menu for providing the real-time traffic service. A method for handing over a packet data service of an internet network to a mobile communication network. The method of claim 1, wherein step (f) When the handover is performed in the step (e) through the IP movement process, the provided real-time traffic service is stopped for a while, and the packet data service of the mobile Internet network is replayed after the handover to the mobile communication network. How to handover. The method of claim 1, wherein the target mobile communication network, A packet data service of a mobile Internet network, which is either a synchronous mobile communication network including a CDMA 2000 1X network, a 1x EV-DO network, a 1x EV-DV network, or an asynchronous mobile communication network including a WCDMA network and an HSDPA network. How to handover to a mobile network. According to claim 1, The portable Internet network, A network termination apparatus, comprising: a RAS (Radio Access Station) for providing packet data for the packet data service to the composite terminal and receiving a strength value of a signal measured for a transmission signal from the composite terminal; ACR for connecting and controlling a plurality of the RAS, allocating IP for portable Internet service to the composite terminal, and transmitting packet data transmitted from the other network to the composite terminal through the RAS for the packet data service. Access Control Router); An IP network for transmitting and receiving the packet data and transmitting the packet data to the other network and the ACR; A home agent (HA) performing a routing function of transmitting data from the other network in the packet data service; And Authentication server (AAA: Authentication, Authorization, Accounting) for authenticating the connection of the composite terminal A method for handing over a packet data service of a portable internet network to a mobile communication network comprising a.

Images