KR100976943B1 - Method and system for delivering information of base-station identification on handover between Heterogeneous Networks - Google Patents

Abstract

According to the present invention, when a mobile communication terminal moves from a WiMAX network to a TD-SCDMA network, the base station ID (BSID) information of the WiMAX network is transferred to the TD-SCDMA network, so that the GTP tunneling is performed without changing the IP address allocated in the WiMAX network. As a handover system and method between heterogeneous networks to perform handover to a TD-SCDMA network,

The inter-network handover system according to the present invention receives packet data from a WiMAX network and includes BSID information of the WiMAX network in a protocol configuration option when moving from the WiMAX network to a TD-SCDMA network. A mobile station (MS) for wirelessly transmitting an active PDDP context request message generated by the mobile communication; An ASN gateway for relaying the packet data provided from the WiMAX network to the mobile station via a WiMAX base station; Manage location movement of the mobile station (MS) to a TD-SCDMA network, receive the active PDDP context request message sent from the mobile station (MS), and receive base station ID (BSID) information of the WiMAX network. SSGSN sending a PDP context request message as a basis; Manages the PDDP address requested by the MS, receives the generated PDDP context request message, and receives the base station ID (BSID) information of the WiMAX network. Request GTP tunneling to the gateway to establish a GTP tunnel with the ASN gateway, receive the packet data from the WiMAX network through the GTP tunnel, and A GGSN serving a mobile station (MS) located in the TD-SCDMA network via a SGSN; And performing wireless section matching with the mobile station (MS) and matching with the SGSN (SGSN), and transmitting the packet data provided from the support GSN to the mobile station (MS) via a TD-SCDMA base station. Transmit base station controller (RNC).

According to the present invention, even if a mobile station (MS) performs handover between different heterogeneous networks, it is possible to receive packet data without interruption. In addition, it is possible to reduce packet delay and loss as the mobile station (MS) performs handover from the WiMAX network to the TD-SCDMA network. In addition, the mobile station (MS) can safely move to the TD-SCDMA network to perform continuous communication without changing the IP address assigned in the WiMAX network

Handover, WiMAX, TD-SCDMA, Base Station ID, PDP Context, SGSN, GGSN, ASN

Description

Method and system for delivering information of base-station identification on handover between Heterogeneous Networks}

The present invention relates to a handover system and method between heterogeneous networks, and more particularly, when a mobile communication terminal moves from a worldwide interoperability for microwave access (WiMAX) network to a time-division synchronous CDMA (TD-SCDMA) network. A handover system between heterogeneous networks, which transmits BSID information of a network to a TD-SCDMA network to perform handover to a TD-SCDMA network through GTP tunneling without changing an IP address allocated in a WiMAX network. It is about a method.

Recently, users of mobile communication terminals require various services regardless of network type. The establishment of the interworking network to meet the needs of these users is being visualized, and the research on the 3G mobile communication and the WLAN is the most active.

However, these networks have evolved independently and use different specifications and standards. Therefore, various matters such as architecture, protocol structure, mobility, quality of service, authentication, security, billing, etc. should be considered for interworking each network, and modification and supplementation of each matter had to be accompanied.

As the interworking between these various networks becomes important, a handover scheme for the movement of the terminal in the interworking structure as well as the interworking structure is essential in order to provide a seamless service from the user side. The most common method is to use Mobile IP which is already used in Homogeneous Network, and methods such as Fast Handoff to reduce packet delay and loss of Mobile IP are mainly used. Such schemes have a problem in that packet delay and loss exist for an interval between transmitting three-layer messages by performing handover by sending and receiving messages based on IP layers, that is, three layers (L3). .

In order to solve the above problems, the present invention, when the mobile communication terminal moves from the WiMAX network to the TD-SCDMA network, the base station ID (BSID) information of the WiMAX network is transferred to the TD-SCDMA network, which is allocated in the WiMAX network An object of the present invention is to provide a handover system and method between heterogeneous networks for performing handover to a TD-SCDMA network through GTP tunneling without changing an IP address.

A heterogeneous network handover system according to the present invention for achieving the above object, when receiving the packet data from the WiMAX network, when moving from the WiMAX network to the TD-SCDMA network, the base station ID (BSID) of the WiMAX network A mobile station (MS) for wirelessly transmitting an active PDP context request message generated by including information in a protocol configuration option; An ASN gateway for relaying the packet data provided from the WiMAX network to the mobile station via a WiMAX base station; Manage location movement of the mobile station (MS) to a TD-SCDMA network, receive the active PDDP context request message sent from the mobile station (MS), and receive base station ID (BSID) information of the WiMAX network. SSGSN sending a PDP context request message as a basis; Manages the PDDP address requested by the MS, receives the generated PDDP context request message, and receives the base station ID (BSID) information of the WiMAX network. Request GTP tunneling to the gateway to establish a GTP tunnel with the ASN gateway, receive the packet data from the WiMAX network through the GTP tunnel, and A support SN (GGSN) for providing to the mobile station (MS) located in the TD-SCDMA network via an SSG SN (SGSN); And performing wireless section matching with the mobile station (MS) and matching with the SGSN (SGSN), and transmitting the packet data provided from the support GSN to the mobile station (MS) via a TD-SCDMA base station. Transmit base station controller (RNC).

In addition, the mobile station (MS) generates the Active PD (PDP) context request message by adding the base station ID (BSID) information to the additional parameter list of the protocol configuration option.

The MS also inserts the base station ID (BSID) information having a length of 48 bits into the additional parameter list of the protocol configuration option to generate the active PDDP context request message.

Further, the MS uses the octet w + 1 to octet z to add the additional parameter list to the protocol configuration option, and the base station ID BSID is used in the octet. Information is inserted to generate the PDP context request message.

The mobile station MS further includes information including container ID information, container ID length content, and base station ID BSID in the octet w + 1 to octet z in the additional parameter list. Add to generate the active PDDP context request message.

In addition to the base station ID (BSID) information of the WiMAX network, the mobile station (MS) includes a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, an access point name (APN), QoS, The active PDDP context request message including the PDP configuration option information is transmitted to the SGSN via the TD-SCDMA base station and the base station controller RNC.

In addition, when the SGSN receives the PDP context request message from the mobile station, the SGSN transmits an allocation request message of a radio access bearer to the base station controller (RNC). After the base station controller (RNC) assigns the radio access bearer (RAB) to the mobile station (MS), it receives an assignment response message of the radio access bearer (RAB) from the base station controller (RNC).

The base station controller (RNC) transmits a radio link resource (RLR) ready message to the TD-SCDMA base station and informs that the radio link resource (RLR) is ready from the TD-SCDMA base station. Receives a message, transmits a message for the radio link resource (RLR) to the TD-SCDMA base station, and then transmits a setup message of the radio access bearer (RAB) to the mobile station (MS), the mobile station (MS) The setup complete message of the radio access bearer (RAB) is received.

On the other hand, the heterogeneous network handover method according to the present invention for achieving the above object, the mobile station (MS) receiving the packet data from the WiMAX network through the ASN gateway (ASN) gateway and the WiMAX base station, A method for handover between heterogeneous networks for handover to a TD-SCDMA network including an SGSN, a base station controller (RNC), and a TD-SCDMA base station, the method comprising: (a) the mobile station (MS) is a base station ID (BSID) of the WiMAX network; ) Including the information in the protocol configuration option to generate an active PDDP context request message; (b) the mobile station (MS) forwarding the active PDDP context request message to the SGSN; (c) the SGSN sends a generated PDDP context request message to the GSSN based on the base station ID information; (d) The GNSS requests GTP tunneling to the ASN gateway based on the BSID information, so that the GSS and the GNS Establishing a GTP tunnel between the gateways; And (e) the mobile station (MS) via the GTP tunnel from the support SSN (SGSN) via the SSGSN (SGSN) and the base station controller (RNC) and the TD-SCDMA base station Receiving data.

In the step (a), the base station ID (BSID) information is added to the additional parameter list of the protocol configuration option to generate the active PDDP context request message.

In the step (a), the base station ID (BSID) information having a length of 48 bits is inserted into the additional parameter list of the protocol configuration option to generate the active PDDP context request message.

In addition, in the step (a), when adding the additional parameter list to the protocol configuration option, octet w + 1 to octet z are used, and the base station ID BSID is used in the octet. Information is inserted to generate the PDP context request message.

Further, in the step (a), information including container ID information, length content of container ID, and base station ID (BSID) is included in the octet w + 1 to octet z in the additional parameter list. In addition, the active PDDP context request message is generated.

In addition, in the step (a), the active PDDP context request message may include a network layer service access point identifier (NSAPI), a TI, a PDP type, and a PDP address in addition to base station ID information of the WiMAX network. Access point name (APN), QoS, and PDP configuration option information.

In the step (d), the SSGSN receives a response message for the generated PDP context request from the GNSS, and sends the active PDDP to the MS. Send a response message to the context request.

The step (d) may include the IP of the ASN gateway based on base station ID (BSID) information of the WiMAX network to which the mobile station MS has previously connected. After obtaining the address, GTP establishes the GTP tunnel with the ASN gateway.

On the other hand, the mobile station according to the present invention for achieving the above object, the mobile station performing a handover from the WiMAX network to the TD-SCDMA network, Communication unit for communicating with the WiMAX network and the TD-SCDMA network; A handover processor configured to generate an active PDP context request message by including BSID information of the WiMAX network in a protocol configuration option; And a storage unit which stores a message creation form for creating the active PDP context request message. And a control unit for controlling the active PDP context request message to be sent to the TD-SCDMA network through the communication unit.

The controller may add base station ID (BSID) information of the WiMAX network previously accessed to the additional parameter list of the protocol configuration option of the message for activating the PDP context through the handover processing unit. .

The handover processor may further include a container ID, a length content of a container ID, and a base station ID by using octets from octet w + 1 to octet z in octets of the protocol configuration option. Generate the active PDP context request message including (BSID) information.

The PDP context request message may include a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, and an access point name (APN) in addition to base station ID (BSID) information of the WiMAX network. ), Quality of service (QoS), and PDP configuration option information.

On the other hand, the heterogeneous network handover method of the mobile station according to the present invention for achieving the above object, while receiving the packet data from the WiMAX network including the ASN (ASN) gateway and WiMAX base station, SSGSN (SGSN) A method for handover between heterogeneous networks of a mobile station moving to a TD-SCDMA network including a base station controller (RNC) and a TD-SCDMA base station, the method comprising: (a) transmitting base station ID (BSID) information of the WiMAX network to a protocol configuration option; Generating an active PDDP context request message; (b) forwarding the generated PDPD context request message to the SGSN; And (c) the SGSN and the base station controller (RNC) and the SSG from the GNSN through a GTP tunnel established between the GNSN and the ASN gateway. And receiving the packet data via the TD-SCDMA base station.

In the step (a), the base station ID (BSID) information is added to the additional parameter list of the protocol configuration option to generate the active PDDP context request message.

Also, in the step (a), the base station ID (BSID) information having a length of 48 bits is inserted into the additional parameter list of the protocol configuration option to generate the active PDP context request message.

In addition, in the step (a), when adding the additional parameter list to the protocol configuration option, octet w + 1 to octet z are used, and the base station ID BSID is used in the octet. Information is inserted to generate the PDP context request message.

Further, in the step (a), information including container ID information, length content of container ID, and base station ID (BSID) from the octet w + 1 to octet z in the additional parameter list. Add to generate the active PDDP context request message.

In the step (a), the active PDDP context request message includes a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, and an access in addition to the base station ID (BSID) information of the WiMAX network. It includes point name (APN), quality of service (QoS), and PDP configuration option information.

According to the present invention, even if a mobile station (MS) performs handover between different heterogeneous networks, it is possible to receive packet data without interruption. In addition, it is possible to reduce packet delay and loss as the mobile station (MS) performs handover from the WiMAX network to the TD-SCDMA network. In addition, the mobile station (MS) can safely move to the TD-SCDMA network to perform continuous communication without changing the IP address assigned in the WiMAX network.

The TD-SCDMA network and the WiMAX network may be interworked by transmitting base station ID information of the WiMAX network.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram schematically showing a configuration of a handover system between heterogeneous networks according to an embodiment of the present invention.

1, a heterogeneous network handover system according to the present invention includes a mobile station (MS) 110, a WiMAX base station 120-122, a TD-SCDMA base station 123-125, and an access service network. (Access Service Network (ASN) gateway 130), BS (Radio Network Controller, RNC) 140, 142, Serving GPRS Support Node (SGSN) 150, gateway A Gateway GPRS Support Node (GGSN) 160 and a Home Location Register (HLR) 170 are included.

Here, the TD-SCDMA base stations 123 to 125, the RNCs 140 and 142, and the SGSN 150 form a time division-synchronous code division multiple access (TD-SCDMA) communication network. Achieve.

In addition, the WiMAX base station (120 ~ 122) and the ASN gateway 130 forms a communication network of the WiMAX (Worldwide Interoperability for Microwave Access, IEEE 802.16a).

In the embodiment of the present invention, a handover between the WiMAX network and the TD-SCDMA network has been described as an example, but the same may be applied to other mobile communication networks capable of performing GTP (GPRS Tunneling Protocol) tunneling.

The mobile station 110 receives the packet data from the WiMAX network connected to the Internet via the ASN gateway 130 and the WiMAX base stations 120 to 122.

In addition, the mobile station 110 transmits and receives a voice signal through the TD-SCDMA base stations 123 to 125, and also the TD-SCDMA base stations 123 to 125, the RNCs 140 and 142, the SGSN 150, and the GGSN ( Packet data may be received from the WiMAX network via 160).

In addition, the mobile station 110 transmits an active PDP context request message generated by including base station ID (BSID) information of a WiMAX network to a protocol configuration option to the SGSN 150.

When the mobile station 110 transmits an active PDP context request message to the SGSN 150, the mobile station 110 includes an active base station ID (BSID) information of a newly connected TD-SCDMA network and a previously connected WiMAX network. Sends a PDP context request message to SGSN 150.

Here, network information of a newly connected TD-SCDMA network includes a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, an access point name (APN), and a quality of service (QoS). , PDP Configuraton Option.

The WiMAX base stations 120 to 122 transmit packet data received from the Internet via the ASN gateway 130 to the mobile station 110 in a wireless signal.

The TD-SCDMA base stations 123 to 125 transmit voice signals or data relating to mobile communication to the mobile station 110 as wireless signals. In addition, the TD-SCDMA base stations 123 to 125 may be referred to as "Node-B" and may also be referred to as "UTRAN (Universal Mobile Telecommunication System (UMTS) Terrestrial Radio Access Network)".

The ASN gateway 130 relays the packet data received from the Internet to the mobile station 110.

The RNCs 140 and 142 manage a plurality of TD-SCDMA base stations 123 to 125 and control transmission and reception of voice signals and data through the plurality of TD-SCDMA base stations 123 to 125. In addition, the RNCs 140 and 142 perform radio segment matching with the mobile station 110 and matching with the SGSN 150.

The RNC 140 transmits a radio link resource (RLR) preparation message to the base station 123 that transmits packet data to the mobile station 110 wirelessly, and the radio link resource (RLR) is stored from the base station 123. Receive a message indicating that it is ready.

Subsequently, the RNC 140 transmits a Commit message for committing a radio link resource (RLR) to the base station 123, and then transmits a setup message of the radio access bearer (RAB) to the mobile station 110. 110, a setup complete message of a radio access bearer RAB is received.

SGSN 150 manages the location movement of mobile station 110. To this end, SGSN 150 has a Visitor Location Register (VLR) that stores location information of mobile station 110.

In addition, the SGSN 150 receives an active PDDP context request message sent from the mobile station 110 and generates a PDDP context request message based on the base station ID (BSID) information of the WiMAX network. ).

The SGSN 150 sends a generated PDDP context request message including the device station ID (BSID) information of the previously connected WiMAX network and the base station ID (ID) information of the TD-SCDMA network to be newly connected to the GGSN 160. send.

The SGSN 150 receives a response message for the generated PDDP context request from the GGSN 160 after the GTP tunnel is established between the GGSN 160 and the ASN gateway 130, and based on this, the mobile station 110 receives the response message. Send a response message to the PDP context request.

When the SGSN 150 receives the PDP Context Request message from the mobile station 110, the SGSN 150 transmits an allocation request message of the radio access bearer (RAB) to the RNC 140, and the RNC 140 transmits the mobile station 110. After allocating a radio access bearer (RAB) to the RNC 140, the RNC 140 receives an allocation response message of the radio access bearer (RAB).

The GGSN 160 manages a PDP Address requested by the mobile station 110.

In addition, the GGSN 160 receives the generated PDDP context request message and requests GTP tunneling to the ASN gateway 130 based on the base station ID (BSID) information of the WiMAX network. ) And a GTP tunnel, and receive packet data from the Internet through a GTP tunnel and provide the GTP tunnel to the mobile station 110 via the SGSN 150.

The HLR 170 is a database that stores a service profile regarding subscriber information of the mobile station 110. The HLR 170 includes a subscriber's telephone call, a mobile identification number (MIN), and a terminal unique number (Electronic) of the mobile station 110. Serial Number (ESN) and service type. The HLR 170 performs a function of storing subscriber information including information of the base station 123 in which the mobile station 110 is located and the RNC 140.

Meanwhile, the mobile station 110 according to the present invention follows the OSI basic reference model as a radio interface protocol, and performs handover to the TD-SCDMA network without changing the IP address allocated from the WiMAX network through the network layer (Layer 3). To do this, the base station ID (BSID) is transmitted to the TD-SCDMA network through the data link layer (Layer 2) in the previously connected WiMAX network.

delete

delete

delete

delete

delete

delete

delete

delete

3 is a flowchart illustrating a process of generating an active PDP context request message including base station ID information in a handover method between heterogeneous networks according to an embodiment of the present invention.

In the embodiment of the present invention, a mobile station 110 moves to a TD-SCDMA network while receiving packet data from a WiMAX network.

Referring to FIG. 3, when the mobile station 110 moves to a TD-SCDMA network while receiving a packet data service by receiving an IP address from the WiMAX network, the mobile station 110 receives a PDP to receive packet data through the TD-SCDMA network. Since the context needs to be activated, a message composition form for creating an active PDP context request message is loaded (S310).

Subsequently, the mobile station 110 receives base station ID (BSID) information of the WiMAX network previously connected to the additional parameter list of the protocol configuration options of the message for activating the PDP context. It adds (S320).

Here, the active PDP context request message has the content as shown in FIG. 5 is a diagram illustrating contents of an active PD context request message. As shown in FIG. 5, the active PDP context request message is a content element as a protocol discriminator, a transaction identifier, an active PDP context request message identity, a requested NSAPI ( Network service access point identifier (LLC), requested LLC service access point identifier (SAPI), Requested QoS, Requested PDP address, Access point name, Protocol configuration options (Protocol configuration options).

The mobile station 110 adds base station ID (BSID) information in the content of the active PDP context request message using a protocol configuration option.

The mobile station 110 uses octets from Octet w + 1 to Octet z in octets of the protocol configuration option as shown in FIG. 6, so that the container ID, the length content of the container ID, and the base station are octets. An active PDP context request message including ID information is generated (S330).

6 shows the components of a protocol configuration option. As shown in FIG. 6, the protocol configuration option uses octets 1 through octet z, where octet 1 represents the IEI of the protocol configuration option and octet 2 represents the length of the protocol configuration option.

Octet 3 represents the extension, spare, and configuration protocol, octets 4 and 5 represent the protocol ID1, octet 6 the length of the content of protocol ID1, and octets 7 to the protocol ID1 content. Indicates.

Octets m + 1 to m + 2 represent protocol ID2, octet m + 3 represents the length of protocol ID2 content, and octets m + 4 to octet n represent protocol ID2 content.

Each octet then represents protocol ID n-1, the length of protocol ID n-1 content, protocol ID n-1 content, protocol ID n, protocol ID n content length, and protocol ID n content.

Next, the length of the container ID1 and the container ID1 content and the BSID information are shown from octet w + 1 to octet x, and the container ID n, the container ID n content length, and the container ID n content are shown after the octet x + 1.

At this time, the mobile station 110 inserts base station ID (BSID) information having a length of 48 bits into an additional parameter list of the protocol configuration option to generate an active PDP context request message. .

As shown in FIG. 6, the mobile station 110 includes container ID 1 information and length content of the container ID in the additional parameter list from Octet w + 1 to Octet z. Information including ID 1 contents and base station ID (BSID) is added to generate an active PDDP context request message.

The mobile station 110 transmits the generated active PDDP context request message to SSGSN (S340).

Here, the active PDDP context request message may include a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, and an access point name (APN) in addition to the BSID information of the WiMAX network. ), Quality of service (QoS), and PDP configuration option information.

4 is a flowchart illustrating a method for handover between heterogeneous networks according to an embodiment of the present invention.

Referring to FIG. 4, as described above, the mobile station 110 moving from the WiMAX network to the TD-SCDMA network and located in the TD-SCDMA network transmits an active PDDP context request message including base station ID (BSID) information. The transmission is transmitted to the SGSN 150 via the TD-SCDMA base station 123 and the RNC 140 (S402).

Here, the active PDDP context request message may include a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, an access point name (APN), a quality of service (QoS), and a PDP. It includes network information of a TD-SCDMA network including a configuration option and base station ID (BSID) information of a previously connected WiMAX network.

When the SGSN 150 receives the PDP context request message from the mobile station 110, the SGSN 150 transmits an Assignment REQ message of the radio access bearer (RAB) to the RNC 140 (S404).

When the RNC 140 receives an Assignment REQ message of the radio access bearer (RAB), the RNC 140 transmits a radio link resource (RLR) preparation message to the TD-SCDMA base station 123 (S406).

The TD-SCDMA base station 123 transmits a message indicating that the radio link resource (RLR) is ready (R408) to the RNC 140 (S408).

Accordingly, the RNC 140 transmits a Commit message for the radio link resource (RLR) to the TD-SCDMA base station 123 (S410).

Subsequently, the RNC 140 transmits a setup message of the radio access bearer (RAB) to the mobile station 110 via the TD-SCDMA base station 123 (S412).

In contrast, the mobile station 110 transmits a Setup Complete message of the radio access bearer (RAB) to the RNC 140 via the TD-SCDMA base station 123 (S414).

Through steps S406 to S414 described above, the RNC 140 establishes a radio access bearer (RAB) to the mobile station 110 through the TD-SCDMA base station 123.

Subsequently, the RNC 140 sets up a radio access bearer (RAB) to the mobile station 110 and then transmits an assignment response (SP) message of the radio access bearer (RAB) to the SGSN 150 (S416).

SGSN 150 receives an active PDP context request message from mobile station 110, establishes a radio access bearer (RAB) to mobile station 110, and then sends a generated PDDP context request message to GGSN 160. In step (S418).

The GGSN 160 transmits a GTP Tunneling REQ message to the ASN gateway 130 previously connected to the mobile station 110 according to a request for generating a PDP context (S420).

Here, the GGSN 160 obtains the IP address of the ASN gateway 130 based on the base station ID (BSID) information previously accessed by the mobile station 110, and then uses the GTP to transmit the ASN gateway 130. Requests GTP tunneling.

Accordingly, the ASN gateway 130 transmits a GTP Tunneling RSP message to the GGSN 160.

The GGSN 160 receives the GTP tunneling response message from the ASN gateway 130 (S422), and establishes a GTP tunnel with the ASN gateway 130 based on the GTPN 160.

The GGSN 160 transmits a response message (Create PDP Context RSP) to the SGSN 150 in response to the PDP context request (S424).

Accordingly, the SGSN 150 transmits a response message to the active PDDP context request to the mobile station 110 via the RNC 140 and the TD-SCDMA base station 123 (S426).

Therefore, a traffic flow is performed between the mobile station 110 and the GGSN 160 via the TD-SCDMA base station 123, the RNC 140, and the SGSN 150 (S428).

That is, even if the mobile station 110 performs a handover to the TD-SCDMA network while receiving packet data through the ASN gateway 130 and the WiMAX base station 120 from the WiMAX network connected to the Internet, the GGSN 160 is performed. Is transmitted from the Internet of the IP network through the ASN gateway 130 and the GGSN 160 through the GTP tunneling formed between the ASN gateway 130 and the SGSN 150, the RNC 140, and the TD-SCDMA (TD-SCDMA) of the TD-SCDMA network. By way of 123, it is possible to securely receive packet data without changing the IP address.

As described above, according to the present invention, when a mobile station (MS) receiving packet data from the WiMAX network through the ASN gateway performs a handover to the TD-SCDMA network, base station ID (BSID) information of the iMAX network is performed. A system and method for handover between heterogeneous networks that delivers a packet data transmission service without changing an IP address through a GTP tunnel by establishing a GTP tunnel between the GGSN and the ASN gateway by transmitting the TD-SCDMA network to the TD-SCDMA network. Can be realized.

As those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features, the embodiments described above should be understood as illustrative and not restrictive in all aspects. Should be. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents are included in the scope of the present invention. Should be.

The present invention can be applied to a system in which a mobile station (MS) performs a handover from a WiMAX network to a TD-SCDMA communication network, and can be applied to a heterogeneous mobile communication system capable of performing GTP tunneling even in a heterogeneous communication network.

1 is a configuration diagram schematically showing a configuration of a handover system between heterogeneous networks according to an embodiment of the present invention.

2 is a schematic diagram showing an internal configuration of a mobile station MS according to an embodiment of the present invention.

3 is a flowchart illustrating a process of generating an active PDP context request message including base station ID information in a heterogeneous network handover method according to an embodiment of the present invention.

4 is a flowchart illustrating a method for handover between heterogeneous networks according to an embodiment of the present invention.

5 is a diagram illustrating contents of an active PD context request message.

6 shows the components of a protocol configuration option.

<Description of Symbols for Main Parts of Drawings>

110: mobile station 120 to 122: WiMAX base station

123 to 125: TD-SCDMA base station 130: ASN gateway

140, 142: RNC 150: SGSN

160: GGSN 170: HLR

210: communication unit 220: packet processing unit

230: display unit 240: storage unit

250: handover processing unit 260: control unit

Claims (26)

When receiving packet data from a WiMAX network and moving from the WiMAX network to a TD-SCDMA network, an active PDDP context request message generated by including base station ID (BSID) information of the WiMAX network in a protocol configuration option is provided. A mobile station (MS) transmitting wirelessly; An ASN gateway for relaying the packet data provided from the WiMAX network to the mobile station via a WiMAX base station; Manage location movement of the mobile station (MS) to a TD-SCDMA network, receive the active PDDP context request message sent from the mobile station (MS), and receive base station ID (BSID) information of the WiMAX network. SSGSN sending a PDP context request message as a basis; Manages the PDDP address requested by the MS, receives the generated PDDP context request message, and receives the base station ID (BSID) information of the WiMAX network. Request GTP tunneling to the gateway to establish a GTP tunnel with the ASN gateway, receive the packet data from the WiMAX network through the GTP tunnel, and A support SN (GGSN) for providing to the mobile station (MS) located in the TD-SCDMA network via an SSG SN (SGSN); And Performs wireless section matching with the mobile station (MS) and matching with the SGSN (SGSN), and transmits the packet data provided from the GNSSN to the mobile station (MS) via a TD-SCDMA base station. A base station controller (RNC); Heterogeneous inter-network handover system comprising a. The method of claim 1, The mobile station (MS) generates the active PDDP context request message by adding the base station ID (BSID) information to an additional parameter list of the protocol configuration option. Handover system. The method of claim 2, The mobile station (MS) inserts the base station ID (BSID) information having a length of 48 bits into an additional parameter list of the protocol configuration option to activate the PDP context request message. Heterogeneous network handover system, characterized in that for generating. The method of claim 2, The MS uses the octet w + 1 to octet z to add the additional parameter list to the protocol configuration option, and the base station ID (BSID) information in the octet. Inter-network handover system, characterized in that to insert the PDP context request message. The method of claim 4, wherein The mobile station MS includes container ID 1 information and length of container ID 1 contents in the octet w + 1 to octet z in the additional parameter list. And generating an active PDP context request message by adding information including a base station ID (BSID). The method of claim 1, The mobile station (MS), in addition to the base station ID (BSID) information of the WiMAX network, the network layer service access point identifier (NSAPI), TI, PDP type (Type), PDP Address (APN), access point name (APN), QoS (Quality of Service), the PDP Context Request message including PDP Configuraton Option information to the SGSN via the TD-SCDMA base station and the base station controller (RNC). Handover system between heterogeneous networks, characterized in that for transmitting. The method of claim 1, When the SGSN receives the PDP context request message from the mobile station, the SGSN transmits an allocation request message of a radio access bearer to the base station controller (RNC). Heterogeneous network characterized in that after the controller (RNC) assigns the radio access bearer (RAB) to the mobile station (MS), an assignment response message of the radio access bearer (RAB) is received from the base station controller (RNC). Handover system. The method of claim 1, The base station controller (RNC) transmits a radio link resource (RLR) ready message to the TD-SCDMA base station, and sends a message indicating that the radio link resource (RLR) is ready from the TD-SCDMA base station. Receive and transmit a Commit message for the radio link resource (RLR) to the TD-SCDMA base station, and then transmit a setup message of the radio access bearer (RAB) to the MS. And a setup complete message of the radio access bearer (RAB) from the MS. A mobile station (MS) receiving packet data from an ASN gateway and a WiMAX base station from the WiMAX network includes an SGSN (SGSN), a supporting SSN (GGSN), a base station controller (RNC), and a TD-SCDMA base station. In a handover method between heterogeneous networks for handing over to a TD-SCDMA network, (a) the mobile station (MS) generating a PDP context request message by including base station ID (BSID) information of the WiMAX network in a protocol configuration option; (b) the mobile station (MS) forwarding the active PDDP context request message to the SGSN; (c) the SGSN sends a generated PDDP context request message to the GSSN based on the base station ID information; (d) The GNSS requests GTP tunneling to the ASN gateway based on the BSID information, so that the GSS and the GNS Establishing a GTP tunnel between the gateways; And (e) the mobile station (MS) via the GTP tunnel from the support SSN (SGSN) via the SSGSN (SGSN) and the base station controller (RNC) and the TD-SCDMA base station Receiving a step; Handover method between heterogeneous networks comprising a. The method of claim 9, The step (a) may include generating the active PDDP context request message by adding the BSID information to an additional parameter list of the protocol configuration option. Handover method. The method of claim 10, In the step (a), the base station ID (BSID) information having a length of 48 bits is inserted into an additional parameter list of the protocol configuration option to insert the active PDDP context request message. Handover method between heterogeneous networks, characterized in that for generating. The method of claim 9, In the step (a), when adding the additional parameter list to the protocol configuration option, octet w + 1 to octet z are used, and the base station ID BSID is used in the octet. And inserting information to generate the active PDDP context request message. 13. The method of claim 12, In step (a), container ID 1 information and length of container ID 1 contents from octet w + 1 to octet z in the additional parameter list. And generating an active PDP context request message by adding information including a base station ID (BSID). The method of claim 9, In step (a), the active PDDP context request message includes a network layer service access point identifier (NSAPI), a TI, a PDP type, and a PDP address in addition to base station ID information of the WiMAX network. ), An access point name (APN), quality of service (QoS), and PDP configuration option (Configuraton Option) information. The method of claim 9, In step (d), the SSGSN receives a response message for the generated PDP context request from the SGSN, and requests the active PDDP context to the MS. Handover method between heterogeneous networks, characterized in that for transmitting a response message. The method of claim 9, In the step (d), the IP address of the ASN gateway is based on the base station ID (BSID) information of the WiMAX network to which the GNSSN has previously connected to the MS. After acquiring the GTP, a handover method between heterogeneous networks, characterized in that to establish the GTP tunnel with the ASN gateway. A mobile station performing handover from a WiMAX network to a TD-SCDMA network, A communication unit for communicating with the WiMAX network and the TD-SCDMA network; A handover processor configured to generate an active PDP context request message by including BSID information of the WiMAX network in a protocol configuration option; And A storage unit which stores a message creation form for creating the active PDP context request message; A control unit controlling the active PDP context request message to be transmitted to the TD-SCDMA network through the communication unit; Mobile station comprising a. The method of claim 17, The controller may be further configured to access a base station ID of the WiMAX network, which has previously accessed an additional parameter list of protocol configuration options of a message for activating the PDP context through the handover processing unit. Mobile station characterized by adding (BSID) information. The method of claim 17, The handover processing unit uses the octets from Octet w + 1 to Octet z in octets of the protocol configuration option, and includes a container ID, a length content of a container ID, and a base station ID (BSID). Generate the active PDP context request message containing information). The method of claim 17, The PDP context request message may include a network layer service access point identifier (NSAPI), a TI, a PDP type, a PDP address, and an access point name (APN) in addition to BSID information of the WiMAX network. MS, quality of service (QoS), and PDP configuration option information. While receiving packet data from a WiMAX network including an ASN gateway and a WiMAX base station, a TD-SCDMA including a SGSN, a support SN, a base station controller (RNC), and a TD-SCDMA base station. A method for handover between heterogeneous networks of a mobile station moving to a network, generating a PDP context request message by including base station ID (BSID) information of the WiMAX network in a protocol configuration option; (b) forwarding the generated active PDDP context request message to the SGSN; And (c) SGSN (SGSN), the base station controller (RNC), and the TD from the GNSS (GGSN) through a GTP tunnel established between the GNSN and the ASN gateway. Receiving the packet data via a SCDMA base station; Method for handover between heterogeneous networks of a mobile station comprising a. The method of claim 21, In step (a), the base station ID (BSID) information is added to an additional parameter list of the protocol configuration option to generate the active PD (PDP) context request message. How to handover between networks. The method of claim 21, In the step (a), the base station ID (BSID) information having a length of 48 bits is inserted into an additional parameter list of the protocol configuration option to insert the active PDDP context request message. A method for handover between heterogeneous networks of a mobile station, comprising: generating a network. The method of claim 21, In the step (a), when adding the additional parameter list to the protocol configuration option, octet w + 1 to octet z are used, and the base station ID BSID information is used in the octet. Inserting a message to generate the active PDDP context request message. The method of claim 24, In step (a), container ID 1 information and length of container ID 1 contents from octet w + 1 to octet z in the additional parameter list. And adding the information including the base station ID (BSID) to generate the active PDP context request message. The method of claim 21, In the step (a), the active PDDP context request message includes a network layer service access point identifier (NSAPI), a TI, a PDP type (Type), and a PDP address (in addition to the BSID information of the WiMAX network). A method for handover between heterogeneous networks of a mobile station, comprising: address, access point name (APN), quality of service (QoS), and PDP configuration option information.

Images