KR101697206B1 - Handover system and method between different multiple networks - Google Patents

Abstract

The present invention further provides a policy-related device, in which the terminal device further reports the network environment information of the peripheral network to the policy-related device between the terminal device and the policy-related device, and directly outputs a handover command to the policy- Further, a heterogeneous network handover system and method capable of supporting a more efficient and appropriate handover performance for a terminal apparatus by determining a handover policy for a terminal apparatus by reflecting network environment information is disclosed. A heterogeneous network handover system of the present invention is a system in which a terminal apparatus requests a handover policy for performing a heterogeneous network handover to a policy related apparatus and provides network environment information on a neighbor network when a predetermined information provision time is reached A handover policy in which the policy related device is determined according to predefined policy setting information corresponding to a handover policy request from the terminal device to the terminal device, and based on the network environment information from the terminal device, And provides the handover command to the terminal device based on the network operating status information.

Description

[0001] HANDOVER SYSTEM AND METHOD BETWEEN DIFFERENT MULTIPLE NETWORKS [0002]

The present invention relates to a heterogeneous network handover system, and more particularly, to a terminal apparatus and a policy related apparatus, in which a terminal apparatus further reports network environment information on a neighbor network to a policy related apparatus, A handover command for the terminal device is directly transmitted to the terminal device, and the handover policy for the terminal device is determined by reflecting the network environment information, thereby supporting a more efficient and appropriate handover to the terminal device. System and method, terminal device and terminal device operation method, policy related device, and operation method of policy related device.

2. Description of the Related Art [0002] In recent years, UEs that support multiple communications for various heterogeneous network such as WCDMA and WLAN have come into widespread use.

In the heterogeneous network environment, there is an ANDSF server that provides a heterogeneous network handover policy to the terminal device so that the terminal device can select an optimal network when handover. The ANDSF server includes an Open Mobile Alliance (OMA-DM) Device Management) protocol, it is easy to manage a terminal device that receives a handover policy.

The ANDSF server provides a handover policy for selecting a network to a terminal device, but does not include a handover / mobility function as its own standard. That is, the ANDSF server only issues a handover policy to the terminal device, but does not directly issue a handover-related command.

Since the ANDSF server determines the handover policy only considering the access point of view, it does not take into consideration the real-time environment in the terminal apparatus. Therefore, the present situation of the terminal apparatus and the handover policy of the ANDSF server May be deviated.

The object of the present invention is to provide a handover policy for a heterogeneous network handover to a policy related device, Wherein the policy related device provides the handover policy determined in accordance with predefined policy setting information corresponding to the handover policy request from the terminal device to the terminal device when the network environment information on the neighbor network network is provided, The present invention provides a heterogeneous network handover system and method for providing a handover command to a terminal device based on network operation status information determined based on network environment information from the terminal device, The handover command is directly used by using / using the network environment information of the terminal device, Ratio and is suitable to support the handover.

It is another object of the present invention to provide a handover policy for performing a heterogeneous network handover to a policy related device, and when a predetermined information providing time is reached, The handover control method according to one of the preceding claims, wherein the network environment information for the network is provided to the policy related device, and the predetermined handover process is performed based on at least one of a handover policy and a handover command, The terminal device further reports the network environment information on the peripheral network to the policy related device so that the policy related device can efficiently report the network environment information on the peripheral network to the policy related device, And to support proper handover performance.

Another object to be achieved in the present invention is to store predefined policy setting information, and to store the previously stored policy setting information in response to a handover policy request from a specific terminal device Related device and a policy-related device for providing a handover command to the terminal device based on network operation status information determined based on network environment information from the terminal device, And provides a method of operating the device to directly or indirectly use a handover command by utilizing / using network environment information from a terminal device to be reported, thereby supporting more efficient and proper handover to the terminal device.

According to an aspect of the present invention, there is provided a heterogeneous network handover system for requesting a handover policy for performing a heterogeneous network handover, and when a predetermined information providing time is reached, A terminal device for providing information; And providing a handover policy determined according to predefined policy setting information corresponding to a handover policy request from the terminal apparatus to the terminal apparatus, wherein the network operating status information, which is determined based on the network environment information from the terminal apparatus, And a policy related device for providing a handover command to the terminal device based on the handover command.

According to a second aspect of the present invention, there is provided a terminal device including: a multi-communication unit for supporting communication with a heterogeneous network; A handover performing unit for performing a predetermined handover process based on a specific handover policy and controlling the communication unit to connect to the other network; Requesting a policy related device for a handover policy for performing handover between heterogeneous networks, and providing network environment information on a neighbor network when the predetermined information providing time is reached, And a handover performing unit for controlling the handover performing unit to perform a handover process based on at least one of a handover policy and a handover command to be returned.

Preferably, the apparatus control unit provides a handover policy related information request message requesting the handover policy to the policy related apparatus, and measures a channel environment connected to the handover policy related information request message providing time point And provide the network environment information including channel state information to the policy related apparatus.

Preferably, when the handover policy related information request message is returned from the policy related device in response to the handover policy related information request message, the device control unit transmits a handover policy related information response message included in the handover policy related information response message, And peripheral network information and a handover command, and controls the handover performing unit to perform the handover process based on the handover policy and the surrounding network information according to the handover command.

In order to achieve the above object, according to a third aspect of the present invention, there is provided a policy-related apparatus comprising: a policy setting information storage unit for storing predefined policy setting information; And a handover policy determined in accordance with the policy setting information of the policy setting information storage unit in response to a handover policy request from the specific terminal apparatus to the terminal apparatus, And a server control unit for providing a handover command to the terminal device based on the network operating status information.

Preferably, the network management apparatus further includes a network information management unit for managing real-time network operation status information of each corresponding network network based on network environment information provided from at least one terminal apparatus, and storing network operation status information for each network network .

Preferably, the server control unit determines a handover policy according to the policy setting information in response to a handover policy related information request message for performing a heterogeneous network handover from the terminal apparatus, and responds to the determined handover policy And transmits the handover policy related information response message including the handover policy, the neighbor network information, and the handover command to the terminal device .

Preferably, the server control unit reflects the network environment information from the terminal apparatus in response to the handover policy related information request message for performing the heterogeneous network handover from the terminal apparatus, And generates a handover command based on the network operating status information of at least one network corresponding to the determined handover policy and transmits the handover command to the hand including the handover policy, Over policy response message to the terminal device.

Preferably, the server control unit performs a handover of the access network based on the network operation status information of the current access network and the network to be handed over of the corresponding terminal according to the determined handover policy, And a degree of resource saturation of the network to be handed over to the mobile terminal, and generates the handover command that instructs to perform a handover process according to the determined handover time.

Preferably, the server control unit includes the handover command in an Extension field of a management object in a message based on an Open Mobile Alliance-Device Management (OMA-DM) protocol, and provides the handover command to the terminal apparatus.

According to a fourth aspect of the present invention, there is provided a heterogeneous network handover method in which a terminal apparatus requests a handover policy for performing a heterogeneous network handover to a policy related apparatus, Providing network environment information for a peripheral network; Providing a handover policy to the terminal device, wherein the policy related device is determined according to predefined policy setting information in response to a handover policy request from the terminal device; And providing the handover command to the terminal device based on the network operation status information determined based on the network environment information from the terminal device.

According to a fifth aspect of the present invention, there is provided a method of operating a terminal device, the method comprising: requesting a policy related device for a handover policy for performing a heterogeneous network handover; Providing information on network environment of the neighboring network to the policy-related device when the predetermined information providing time is reached; And a handover performing step of performing a predetermined handover process based on at least one of a handover policy and a handover command to be returned in response to the handover policy request to access corresponding other network.

Preferably, the information providing step may include the step of providing a handover policy related information request message requesting the handover policy to the policy related device, measuring a channel environment connected to the handover policy related information request message providing time, And provide the network environment information including one channel state information to the policy related apparatus.

Preferably, in the handover step, when a handover policy related information response message is returned from the policy related device in response to the handover policy related information request message, Over policy, surrounding network information, and handover command, and performs the handover process based on the handover policy and the surrounding network information according to the handover command.

According to a sixth aspect of the present invention, there is provided a method of operating a policy related device, the method comprising: storing policy setting information for storing predefined policy setting information; And providing a handover policy determined in accordance with the policy setting information previously stored corresponding to a handover policy request from a specific terminal device to the terminal device, wherein the network operating status information determined based on the network environment information from the terminal device And a request response step of providing a handover command to the terminal device based on the request.

Preferably, the network management method further includes a network information management step of managing real-time network operation status information of each corresponding network network based on network environment information provided from at least one terminal device, and storing network operation status information for each network network can do.

Preferably, the request response step includes the steps of: determining a handover policy according to the policy setting information in response to a handover policy related information request message for performing a heterogeneous network handover from the terminal device; Generating a handover command based on the network operation status information of at least one network corresponding to the handover policy, the handover policy information, and the handover command; To the terminal device.

Preferably, in response to the handover policy related information request message for performing the heterogeneous network handover from the terminal apparatus, the request response step may reflect the network environment information from the terminal apparatus, Generating a handover command based on network operation status information of at least one network corresponding to the determined handover policy; and generating a handover command based on the handover policy, And a step of providing a handover policy related information response message including a command to the terminal apparatus.

Preferably, the generating of the handover command may include generating a handover command based on the network operation status information of the current access network of the corresponding terminal according to the determined handover policy and the network network to be handed over, And a degree of resource saturation of a network to be handed over, and generates a handover command to instruct a handover process to be performed according to a determined handover time.

Preferably, the request response step may include the handover command in an Extension field of a management object in a message based on an Open Mobile Alliance-Device Management (OMA-DM) protocol to provide the handover command to the terminal device.

According to the heterogeneous network handover system and method of the present invention, when a terminal transmits and receives a message between a terminal device and a policy related device, the terminal device further reports network environment information on the neighbor network to the policy related device, It is possible to directly perform the handover command for the terminal device based on the related device and further determine the handover policy for the terminal device by reflecting the network environment information, thereby supporting more efficient and appropriate handover to the terminal device .

1 is a configuration diagram of a heterogeneous network handover system according to a preferred embodiment of the present invention.
2 is a block diagram of a terminal device according to a preferred embodiment of the present invention.
3 is a block diagram of a policy related apparatus according to a preferred embodiment of the present invention.
4 is a control flowchart of a heterogeneous network handover method according to a preferred embodiment of the present invention.
5 is a flowchart illustrating an operation method of a terminal according to a preferred embodiment of the present invention.
6 is a flowchart illustrating a method of operating a policy related apparatus according to an exemplary embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a configuration diagram of a heterogeneous network handover system according to a preferred embodiment of the present invention.

As shown in FIG. 1, the heterogeneous network handover system according to the present invention requests a handover policy for performing heterogeneous network handover, and when the predetermined information providing time is reached, A handover policy determined according to predefined policy setting information in response to a handover policy request from the terminal apparatus 100 to the terminal apparatus 100, And a policy related device 300 for providing a handover command to the terminal device 100 based on the network operation state information determined based on the network environment information from the terminal device 100.

Although not shown in the figure, the heterogeneous network handover system according to the present invention may further include a management apparatus (for example, a DM server) interworking between the terminal apparatus 100 and the policy related apparatus 300.

Also, it is preferable that a message based on the Open Mobile Alliance-Device Management (OMA-DM) protocol is transmitted and received between the terminal device 100 and the policy related device 400.

The terminal device 100 is a terminal that multi-supports communication with a heterogeneous network 10 including various types of network.

Here, the heterogeneous network 10 means all or a part of a wireless network that can be connected to a terminal device through interworking of N / W services provided by each provider or owned by a plurality of providers. For example, A WCDMA (1), a CDMA (2), a WLAN (3) such as WiFi, WiMAX (4)

Accordingly, the terminal device 100 supports the connection of the multimode or heterogeneous network 10 so as to be utilized in the above-described heterogeneous network 10, and the terminal device 100 can use the services other than the power- Base station (AP) information of the neighboring radio network can be obtained.

The terminal device 100 may perform message transmission / reception with the policy related device 300 and provide the network environment information of the neighboring network to the policy related device 300.

For example, the terminal device 100 accesses the policy-related device 300 in response to the occurrence of a handover-defined defined handover using a communication service by accessing a specific network (e.g., WLAN) Related information request message (e.g., an ANInfo Request message) requesting a handover policy for performing handover to the policy related device 300. [

At this time, the terminal apparatus 100 transmits the network environment information for the neighboring network, for example, the network environment information for the network network (e.g., WLAN) to which the terminal apparatus 100 is connected, more specifically, For example, WLAN), to the policy-related device 300. The policy-related device 300 may be configured to provide the policy-related device 300 with the network environment information.

When the handover policy related information response message corresponding to the handover policy related information request message is returned, the terminal device 100 sets the handover policy related information response message, The handover process can be performed to access the corresponding other network (e.g., WCDMA).

More specifically, when the handover policy related information response message (e.g., ANInfo Response message) corresponding to the handover policy related information request message is returned, the terminal device 100 is included in the handover policy related information response message Handover policy, neighboring network information, and handover command, performs predetermined handover processing based on the handover policy and the surrounding network information according to the handover command, and transmits the handover command to the corresponding other network (e.g., WCDMA) Can be connected.

When the handover policy request from the terminal device 100 is received, the policy related device 300 transmits a handover policy determined in accordance with the predefined policy setting information in response to the handover policy request from the terminal device 100 To the terminal device 100 and provides a handover command to the terminal device 100 based on the network operating status information determined based on the network environment information from the terminal device 100. [

That is, when the handover policy related information request message (e.g., ANInfo Request message) is received from the terminal device 100, the policy related device 300 determines the handover policy according to the policy setting information, And generate the handover command based on the network operation status information of at least one network corresponding to the determined handover policy.

Accordingly, the policy related device 300 can provide the terminal device 100 with a handover policy related information response message (e.g., ANInfo Response message) including the determined handover policy, surrounding network information, and handover command .

The policy related device 300 includes an access network discovery and selection function (ANDSF) server that provides a heterogeneous network handover policy to a terminal device so that a terminal device can select an optimal network network in a heterogeneous network environment can do.

Hereinafter, a specific configuration of the terminal device 100 according to the present invention will be described with reference to FIG.

The terminal device 100 according to the present invention includes a multi-communication unit 110 for supporting communication with a heterogeneous network, a handover process based on a specific handover policy, Requests the policy related device 300 to perform a handover policy for performing a heterogeneous network handover, and when a predetermined information provision time is reached, the handover execution unit 120 controls the communication unit 110 The device control unit 130 for providing the network environment information to the policy related device 300 and controlling the handover performing unit 120 to perform the handover process based on the handover policy returned in response to the handover policy request, .

The multi-communication unit 110 supports communication with the heterogeneous network 10 including various types of network. That is, the multi-communicating unit 110 includes a first communication module for supporting access to the WCDMA 1 and using the communication service, a second communication module for supporting access to the CDMA 2 and using the communication service, a WLAN 3 And a fourth communication module for supporting connection to the WiMAX 4 and use of the communication service, for example.

The handover performing unit 120 performs a predetermined handover process under the control of the device control unit 130. [

That is, the handover performing unit 120 performs the predetermined handover process based on the handover policy provided by the policy related device 300, and controls the communication unit 110 to access the corresponding other network . Hereinafter, the handover performing unit 120 will be described in detail.

The device controller 130 requests the policy related device 300 to perform a handover policy for performing the heterogeneous network handover and when it reaches the predetermined information providing time point, And controls the handover performing unit 120 to perform a handover process based on the handover policy returned in response to the handover policy request.

More specifically, the device control unit 130 connects to the policy-related device 300 to perform message transmission / reception with the policy-related device 300 and transmits network environment information on the surrounding network to the policy-related device 300).

That is, the device control unit 130 transmits the handover request to the policy related device 300 as the handover execution situation in which the terminal device 100 accesses a specific network (e.g., WLAN) And provides a handover policy related information request message (e.g., ANInfo Request message) for performing heterogeneous network handover to the policy related device 300 to request a handover policy.

Herein, the predefined handover performance may be determined based on various factors such as the movement of the terminal apparatus 100 or the error on the network network (e.g., WLAN) to which the terminal apparatus 100 is currently connected, And the like, and the like.

At this time, the location information of the terminal device 100 and the subscriber characteristic information (e.g., the multimode terminal type information, the preferred network information, the preference billing policy information, etc.) are stored in the handover policy related information request message And terminal information (e.g., MDN, Capability, etc.).

At this time, when the device control unit 130 reaches or receives a predefined information at the time of sending / receiving a message to the policy related device 300, such as transmitting an information request message related to the handover policy (e.g., ANInfo Request message) And provide the network environment information of the neighboring network to the policy related device 300.

For example, the device control unit 130 may store network environment information on a network network (e.g., a WLAN) to which the device itself is currently connected, more specifically, a channel that measures a channel environment of a network (e.g., WLAN) And may provide the network environment information including the status information to the policy related apparatus 300. [

Here, the channel status information includes various measurement information such as resource related information and / or traffic related information that can indicate the congestion degree of the channel environment of the network (e.g., WLAN) to which the terminal device 100 is currently connected desirable.

Here, the predefined time of information provision is defined as a time point after transmitting a handover policy related information request message (e.g., ANInfo Request message) or a handover policy related information request message (e.g., ANInfo Request message) Time, and the like.

If the predefined information providing time is the same time as the handover policy related information request message (e.g., ANInfo Request message), the device control unit 130 transmits the network environment information to the handover policy related information request message Request message) and provide it to the policy-related device 300.

Here, the handover policy related information request message (e.g., ANInfo Request message) includes location information and subscriber characteristic information (e.g., multimode terminal type information, preferred network information, preferential billing policy information, etc.) And terminal information (e.g., MDN, Capability, etc.) and network environment information.

The device controller 130 may control the handover performing unit 120 to perform the handover process based on the handover policy returned in response to the handover policy request.

That is, when the handover policy related information response message is returned in response to the handover policy related information request message (e.g., ANInfo Request message) for performing the heterogeneous network handover, The handover controller 120 recognizes the handover policy, the surrounding network information, and the handover command included in the information response message, and performs the handover process based on the handover policy and the surrounding network information according to the handover command Can be controlled.

In other words, the device control unit 130 recognizes the handover policy and the surrounding network information and the handover command included in the handover policy related information response message (e.g., the ANInfo Response message). The device controller 130 provides the handover policy, the neighboring network information, and the handover command to the handover performing unit 120, and performs a handover process based on the handover policy and the surrounding network information according to the handover command .

Accordingly, the handover performing unit 120 determines another network to be connected by performing the predetermined handover process in accordance with the handover command based on the handover policy, the surrounding network information, and the handover command as described above Performs handover, and controls the communication unit 110 to communicate with the other networks corresponding thereto.

That is, under the control of the device control unit 130, the handover performing unit 120 can recognize the handover policy, the surrounding network information, and the handover command in the handover policy related information response message (e.g., ANInfo Response message) have.

Here, the inter-system mobility policy may include information on permissible and restricted handover between heterogeneous networks, optimal network network type information, optimal network selection and handover priority determination information, and the like.

The access network discovery information may include network network type and ID (e.g., WLAN-SSID, WiMAX-BSID, etc.), characteristic information of a network network, and the like.

The handover command may include a control command for controlling a time point at which a predetermined handover process is performed in the terminal device 100. [

In response to the handover command, the handover performing unit 120 performs a predetermined handover process based on the handover policy and the neighboring network information at the corresponding handover time, And controls the communication unit 110 so as to be connected to the network.

That is, the handover performing unit 120 performs a predetermined handover process based on the handover policy and the surrounding network information at the corresponding handover time, which is shortened or delayed by a specific time from the reference time according to the handover command, (E.g., WCDMA) to be handed over, and controls the communication unit 110 to communicate with another network (e.g., WCDMA) according to the handover.

Here, the predetermined handover process includes a handover process performed on the basis of the handover policy and the surrounding network information in a terminal supporting handover between existing heterogeneous networks, and thus a detailed description thereof will be omitted.

Hereinafter, the policy related apparatus 300 according to the present invention will be described in more detail with reference to FIG.

The policy related device 300 according to the present invention includes a policy setting information storage 310 for storing previously defined policy setting information and a policy setting information storing unit 310 for storing policy setting information in response to a handover policy request from the specific terminal device 100 The handover control unit 310 provides the handover policy determined in accordance with the policy setting information of the handover unit 310 to the terminal device 100. Based on the network operation status information determined based on the network environment information from the terminal device 100, And a server control unit 320 for providing the terminal apparatus 100 with the information.

The policy related device 300 according to the present invention may further include a network information management unit 330.

The network information management unit 330 manages the real-time network operation status information of each corresponding network based on the network environment information provided from at least one terminal device including the terminal device 100, Store / manage information.

For example, when the network environment information for a specific network (e.g., WLAN) is provided from the terminal device 100, the network information management unit 330 updates the network operation status information about the corresponding WLAN in real time Management information on various network networks included in the heterogeneous network 10 can be managed.

The policy setting information storage unit 310 determines various predefined handover policies and specific handover policies for guiding the terminal device to select an optimal network in heterogeneous network handover in a heterogeneous network environment. The policy setting information including the policy decision information that is the policy decision information that becomes the policy decision information.

The server control unit 320 provides the handover policy determined in accordance with the policy setting information of the policy setting information storage unit 310 to the terminal device 100 in response to the handover policy request from the terminal device 100 And provides the handover command to the terminal device 100 based on the network operating status information determined based on the network environment information from the terminal device 100.

More specifically, the server control unit 320 receives a handover policy request from the terminal device 100. [ That is, the server control unit 320 may receive a handover policy related information request message (e.g., an ANInfo Request message) for performing heterogeneous network handover from the specific terminal device 100. [

At this time, the server control unit 320 obtains the network environment information provided from the terminal device 100 by acquiring the network environment information included in the handover policy related information request message, and the network information management unit 330 described above Based on this, it is possible to manage real-time network operation status information of each network.

Accordingly, the server control unit 320 determines the handover policy according to the pre-stored policy setting information.

That is, the server control unit 320 transmits the location information of the terminal device 100 included in the handover policy related information request message (e.g., the ANInfo request message) and the subscriber characteristic information (e.g., multi-mode terminal type information, , Preference billing policy information, etc.), it is possible to determine an optimal handover policy among the handover policies stored in the policy setting information storage unit 310. [

On the other hand, upon receiving the handover policy request from the terminal device 100 at the time of determining the handover policy, the server control unit 320 reflects the network environment information of the peripheral network from the terminal device 100, The handover policy can be determined according to the setting information.

That is, when a handover policy related information request message (e.g., ANInfo Request message) for performing heterogeneous network handover from the specific terminal device 100 is received, the server control unit 320 extracts network environment information from the handover policy related information request message And recognizes channel state information of the channel environment.

The channel state information recognized here includes various measurement information such as resource related information and / or traffic related information that can indicate congestion of the channel environment of a network (e.g., WLAN) to which the terminal device 100 is currently connected .

The server control unit 320 receives the location information and the subscriber characteristic information of the terminal 100 included in the handover policy related information request message such as the multimode terminal type information, the preferred network information, the preference billing policy information, ) And the network environment information, and particularly the channel state information, and determine the corresponding optimal handover policy among the handover policies stored in the policy setting information storage unit 310. [

Accordingly, in the terminal device 100, the handover to the WCDMA is required because the wireless LAN signal is weak, but the policy related device 300 uses the WLAN based on the policy based on the subscriber's preference charging policy information (e.g., WLAN free charging) The optimal handover policy that can prevent the handover policy of the policy-related device 300 from being misaligned with the current state of the terminal device 100, such as occurrence of a data service disconnection phenomenon in the case of adherence to the subscriber, .

The server control unit 320 generates a handover command based on the network operation status information for at least one network corresponding to the determined handover policy, and includes a handover policy, surrounding network information, and a handover command To the terminal device 100, a handover policy related information response message.

That is, the server control unit 320 transmits network operation status information on the current access network (WLAN) and the network network (e.g., WCDMA) to be handed over to the terminal 100 according to the determined handover policy And the network information management unit 330 searches for it. The server control unit 320 determines the channel status of the access network (e.g., WLAN) based on the network operation status information for the current access network (e.g., WLAN) and the network network (e.g., WCDMA) And the degree of resource saturation of a network to be handed over (e.g., WCDMA), and determines a handover time point based on the information.

For example, when the WLAN signal strength of the terminal device 100 connected to the WLAM is lower than a predetermined value in the terminal device 100 using the WLAN, if the WCDMA resource saturation information to be handed over is more than the threshold value, The handover time point is determined to delay the handover time even if the strength of the WLAN signal is weak (saturation state) if the handover performed WCDMA resource saturation information is more than the saturation value It will be possible.

The server control unit 320 generates a handover command for instructing to perform a handover process according to the determined handover time and transmits a handover policy related information response message including a handover policy, (E.g., an ANInfo Response message) to the terminal device 100.

Here, the server control unit 320 preferably includes a handover command in an Extension field of a management object in a message based on an Open Mobile Alliance-Device Management (OMA-DM) protocol and provides the handover command to the terminal apparatus 100 .

Here, the inter-system mobility policy may include information on permissible and restricted handover between heterogeneous networks, optimal network network type information, optimal network selection and handover priority determination information, and the like.

The access network discovery information may include network network type and ID (e.g., WLAN-SSID, WiMAX-BSID, etc.), characteristic information of a network network, and the like.

Based on the returned handover policy related information response message, the terminal device 100 transmits a handover command based on the handover policy and the surrounding network information in response to the handover command from the policy related device 300, Over process to perform handover / connection from the currently connected specific network network (e.g., WLAN) to the corresponding other network network (e.g., WCDMA).

As described above, in the heterogeneous network handover system according to the present invention, the terminal device further reports the network environment information on the peripheral network to the policy related device in message transmission / reception between the terminal device and the policy related device, The policy related device directly provides the handover command to the terminal device based on the handover command and further determines the handover policy for the terminal device by reflecting the network environment information, There is.

Hereinafter, a heterogeneous network handover method according to a preferred embodiment of the present invention will be described with reference to FIG. 4 to FIG. Here, for convenience of description, the components shown in FIGS. 1 to 3 will be described with reference to corresponding reference numerals.

First, a heterogeneous network handover method according to a preferred embodiment of the present invention will be described with reference to FIG.

The terminal device 100 is a terminal that multi-supports communication with a heterogeneous network 10 including various types of network.

Such a terminal apparatus 100 is connected to a specific network network (e.g., a WLAN) and uses a communication service (S10). As a predefined handover execution situation occurs (S20) And transmits / provides a handover policy related information request message (e.g., ANInfo Request message) requesting a handover policy for performing heterogeneous network handover to the policy related device 300 (S30).

At this time, the terminal device 100 can provide the network environment information on the peripheral network, specifically, the network environment information on the network network (e.g., a WLAN) to which the terminal device 100 is connected, to the policy related apparatus 300 S40).

More specifically, the terminal device 100 may provide network environment information including the channel status information of the currently-connected network network (e.g., WLAN) to the policy-related apparatus 300.

When the handover policy is requested from the terminal device 100, the policy related device 300 determines the handover policy according to the predefined policy setting information by reflecting the network environment information from the terminal device 100 (S50) , And generates a handover command based on the network operation status information of at least one network corresponding to the determined handover policy (S60).

The policy related device 300 then provides the terminal device 100 with an information response message (e.g., an ANInfo Response message) related to the handover policy, the response including the determined handover command, the handover policy, and the handover policy S75).

Accordingly, when the handover policy related information response message corresponding to the handover policy related information request message is returned, the terminal device 100 transmits the handover policy and surrounding network information included in the handover policy related information response message, (S80), and performs a predetermined handover process based on the handover policy and the surrounding network information in accordance with the handover command (S90), and can access the corresponding other network (e.g., WCDMA) S95).

Hereinafter, an operation method of the terminal device according to the present invention will be described with reference to FIG.

The operation method of the terminal device 100 according to the present invention supports multiple communications to the heterogeneous network 10. [

That is, the operating method of the terminal device 100 according to the present invention is a method for operating the terminal device 100, including a first communication module supporting connection to the WCDMA 1 and using a communication service, a second communication supporting a connection to the CDMA 2, Module, a third communication module supporting connection to the WLAN 3 and using a communication service, a fourth communication module supporting connection to the WiMAX 4 and use of the communication service, and the like.

The method of operating the terminal device 100 according to the present invention is a method in which the terminal device 100 accesses a specific network (e.g., WLAN) and uses a communication service (S100) (E.g., ANInfo Request message) to the policy related device 300 by requesting a handover policy for performing the heterogeneous network handover by accessing the policy related device 300 (S120).

Herein, the predefined handover performance may be determined based on various factors such as the movement of the terminal apparatus 100 or the error on the network network (e.g., WLAN) to which the terminal apparatus 100 is currently connected, And the like, and the like.

At this time, the location information of the terminal device 100 and the subscriber characteristic information (e.g., the multimode terminal type information, the preferred network information, the preference billing policy information, etc.) are stored in the handover policy related information request message And terminal information (e.g., MDN, Capability, etc.).

When a handover policy is requested by transmitting a handover policy related information request message (e.g., an ANInfo Request message), the method of operation of the terminal device 100 according to the present invention, when reaching a predetermined information providing time, To the policy related device 300, network environment information including network environment information of the current network (e.g., WLAN) to which the current network is connected (e.g., a WLAN) ).

Here, the channel status information includes various measurement information such as resource related information and / or traffic related information that can indicate the congestion degree of the channel environment of the network (e.g., WLAN) to which the terminal device 100 is currently connected desirable.

Here, the predefined time of information provision is defined as a time point after transmitting a handover policy related information request message (e.g., ANInfo Request message) or a handover policy related information request message (e.g., ANInfo Request message) Time, and the like.

Here, when the predefined information providing time is the same time as the handover policy related information request message (e.g., the ANInfo Request message), the operation method of the terminal device 100 according to the present invention includes: Related information request message (e.g., an ANInfo Request message) and provide it to the policy-related device 300. [

The operation method of the terminal device 100 according to the present invention determines whether a handover policy related information response message for transmitting the handover policy related information request message as described above is returned (S140) (Step S150), the handover policy, the neighboring network information, and the handover command included in the handover policy related information response message in the handover policy related information response message (S150) (S160) and performs connection / communication corresponding to the other network according to the handover process (S170).

That is, the method of operation of the terminal device 100 according to the present invention is a method of responding to a handover policy related information request message (e.g., an ANInfo Request message) from the policy related device 300, For example, an ANInfo Response message) is returned, it is possible to recognize the handover policy in the message and the surrounding network information and the handover command.

Here, the inter-system mobility policy may include information on permissible and restricted handover between heterogeneous networks, optimal network network type information, optimal network selection and handover priority determination information, and the like.

The access network discovery information may include network network type and ID (e.g., WLAN-SSID, WiMAX-BSID, etc.), characteristic information of a network network, and the like.

The handover command may include a control command for controlling a time point at which a predetermined handover process is performed in the terminal device 100. [

The method for operating the terminal device 100 according to the present invention performs a predetermined handover process based on a handover policy and surrounding network information at a corresponding handover time according to a handover command, For example, WCDMA).

That is, the operation method of the terminal device 100 according to the present invention is a method of operating a handover procedure based on a handover policy and surrounding network information at a corresponding handover time, which is shortened or delayed by a specific time from a reference time according to a handover command (E.g., WCDMA) to be connected to the mobile communication terminal, and perform handover to communicate with another network (e.g., WCDMA) corresponding thereto.

Here, the predetermined handover process includes a handover process performed on the basis of the handover policy and the surrounding network information in a terminal supporting handover between existing heterogeneous networks, and thus a detailed description thereof will be omitted.

Hereinafter, an operation method of the policy related device 300 according to the present invention will be described in detail with reference to FIG.

The operation method of the policy related device 300 according to the present invention stores predefined policy setting information (S200). Herein, the policy setting information includes various predefined handover policies for guiding the terminal device to select an optimal network in heterogeneous network handover in a heterogeneous network environment, and a policy decision Information.

The operation of the policy related device 300 according to the present invention receives a handover policy request from the terminal device 100 (S210). In other words, the operation method of the policy related device 300 according to the present invention is a method of receiving a handover policy related information request message for performing a heterogeneous network handover from a specific terminal device 100, Over policy request.

The operation method of the policy related device 300 according to the present invention can receive the network environment information from the terminal device 100 (S220). That is, the network environment information provided from the terminal device 100 can be obtained by acquiring the network environment information included in the handover policy related information request message.

Accordingly, the operation method of the policy related device 300 according to the present invention manages real-time network operation status information of each network based on the network environment information provided from the terminal device 100, In operation S230, the real-time network operation status information of each corresponding network is managed based on the network environment information provided from one terminal device, and the network operation status information of each network network is stored / managed.

For example, an operation method of the policy related device 300 according to the present invention is a method of operating the network related to a corresponding WLAN based on the network environment information for a specific network (e.g., WLAN) The status information of the network in the heterogeneous network 10 can be managed by updating / managing the status information in real time.

Meanwhile, the operation of the policy related device 300 according to the present invention determines a handover policy according to pre-stored policy setting information corresponding to the handover policy request in step S210 (S240).

That is, the method of operating the policy related device 300 according to the present invention may include the location information of the terminal device 100 included in the handover policy related information request message and the subscriber characteristic information (e.g., multi-mode terminal type information, The network information, the preference billing policy information, etc.), it is possible to determine the optimal handover policy among the pre-stored handover policies.

Meanwhile, the method of operating the policy related device 300 according to the present invention is a method of operating the policy related device 300 according to the policy setting information, reflecting the network environment information of the peripheral network from the terminal device 100, Can be determined.

That is, when a handover policy related information request message for performing a heterogeneous network handover from the specific terminal device 100 is received, the operation method of the policy related device 300 according to the present invention extracts network environment information from the handover policy related information request message And recognizes channel state information on the channel environment.

The channel state information recognized here includes various measurement information such as resource related information and / or traffic related information that can indicate congestion of the channel environment of a network (e.g., WLAN) to which the terminal device 100 is currently connected .

The method of operation of the policy related device 300 according to the present invention may include the location information of the terminal device 100 included in the handover policy related information request message and the subscriber characteristic information (e.g., multi-mode terminal type information, The handover policy corresponding to the stored handover policies can be determined by reflecting the network environment information, especially the channel state information, and the network environment information, the preference charging policy information, etc.).

When the handover policy is determined, a method of operating the policy related device 300 according to the present invention generates a handover command based on network operation status information of at least one network corresponding to the determined handover policy (S250), and provides a handover policy related information response message including a handover policy, surrounding network information, and a handover command to the terminal device 100 (S260).

That is, the method of operation of the policy related device 300 according to the present invention is a method of operating the policy related device 300 according to the present invention. The current access network network (e.g., WLAN) of the corresponding terminal device 100 according to the determined handover policy, ) Is retrieved. The method of operating the policy related device 300 according to the present invention is a method for operating the policy related device 300 based on network operating status information for a current access network (e.g., WLAN) and a network to be handed over (e.g., WCDMA) (E.g., WLAN), and a degree of resource saturation of a network (e.g., WCDMA) to be handed over, and determines a handover time by reflecting the at least one of them.

For example, when the WLAN signal strength of the terminal device 100 connected to the WLAM is lower than a predetermined value in the terminal device 100 using the WLAN, if the WCDMA resource saturation information to be handed over is more than the threshold value, The handover time point is determined to delay the handover time even if the strength of the WLAN signal is weak (saturation state) if the handover performed WCDMA resource saturation information is more than the saturation value It will be possible.

Accordingly, an operation method of the policy related device 300 according to the present invention includes generating a handover command that instructs a handover process according to a determined handover time, and includes a handover policy, surrounding network information, and a handover command (For example, an ANInfo Response message) to the terminal device 100. The handover-policy-related information response message (e.g.

Here, the method of operating the policy related device 300 according to the present invention includes a step of including a handover command in an Extension field of a Management Object in a message based on an Open Mobile Alliance-Device Management (OMA-DM) 100).

Here, the inter-system mobility policy may include information on permissible and restricted handover between heterogeneous networks, optimal network network type information, optimal network selection and handover priority determination information, and the like.

Based on the returned handover policy related information response message, the terminal device 100 transmits a handover command based on the handover policy and the surrounding network information in response to the handover command from the policy related device 300, Over process to perform handover / connection from the currently connected specific network network (e.g., WLAN) to the corresponding other network network (e.g., WCDMA).

As described above, in the heterogeneous network handover method according to the present invention, the terminal device further reports the network environment information about the neighbor network to the policy related device in message transmission / reception between the terminal device and the policy related device, The policy related device directly provides the handover command to the terminal device based on the handover command and further determines the handover policy for the terminal device by reflecting the network environment information, There is.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

The terminal device additionally reports the network environment information of the peripheral network to the policy related device in the message transmission / reception between the terminal device and the policy related device, and the handover command for the terminal device is directly In addition, applying the heterogeneous network handover system and method that determines the handover policy for the terminal equipment by reflecting the network environment information can achieve great results in terms of network operation improvement, handover efficiency, and user satisfaction. , The terminal devices and policy-related devices to which they are applied, and the service solutions through them, are not only sufficient but also realistically clear.

10: Heterogeneous network
100: terminal device
300: Policy related device

Claims (20)

delete A multi communicator for supporting communication with a heterogeneous network;
A handover performing unit configured to perform a predetermined handover process based on a specific handover policy and to control the multi-communication unit to connect to the other network; And
Requesting a policy related device for a handover policy for performing heterogeneous network handover and providing network environment information on a neighbor network when the predetermined information providing time is reached, And a handover control unit for controlling the handover performing unit to perform a handover process based on a handover policy and a handover command,
The apparatus control unit includes:
Is determined by reflecting at least any one of a channel state of an access network and a degree of resource saturation of a network to be handed over with respect to a current access network of the corresponding terminal according to the handover policy and a network network to be handed over And performs a handover process according to the handover command including a handover time. 3. The method of claim 2,
The apparatus control unit includes:
Related information request message for requesting the handover policy to the policy-related device, and provides the handover-policy-related information request message to the policy-related device, Related information to the policy-related device. The method of claim 3,
The apparatus control unit includes:
When a handover policy related information response message is returned from the policy related device in response to the handover policy related information request message, the handover policy, surrounding network information and handover command included in the handover policy related information response message And controls the handover performing unit to perform the handover process based on the handover command, the handover policy, and the neighboring network information. A policy setting information storage unit for storing previously defined policy setting information; And
A handover policy determining unit configured to provide a handover policy determined in accordance with the policy setting information of the policy setting information storage unit to the terminal apparatus in response to a handover policy request from a specific terminal apparatus, And a server control unit for providing a handover command to the terminal device based on operational status information,
The server control unit,
A channel state of the access network and a degree of resource saturation of the network to be handed over based on the network operation status information of the current access network and the network to be handed over according to the handover policy, Wherein the handover command generating unit generates the handover command by determining a handover time to reflect either one of the handover command and the handover command according to the determined handover time. 6. The method of claim 5,
Further comprising a network information management unit for managing real-time network operation status information of each corresponding network network based on each network environment information provided from at least one terminal apparatus and storing network operation status information for each network network Policy related devices. The method according to claim 6,
The server control unit,
Determining a handover policy according to the policy setting information in response to a handover policy related information request message for performing a heterogeneous network handover from the terminal apparatus and transmitting the handover policy to at least one network corresponding to the determined handover policy Generates a handover command based on the operational status information, and provides a handover policy related information response message including the handover policy, the surrounding network information, and the handover command to the terminal device. . The method according to claim 6,
The server control unit,
Determining a handover policy according to the policy setting information by reflecting network environment information from the terminal apparatus in response to a handover policy related information request message for performing a heterogeneous network handover from the terminal apparatus, And transmits the handover policy related information response message including the handover policy, the neighbor network information, and the handover command to the handover policy information related to the at least one network, Device as a device. delete 9. The method according to claim 7 or 8,
The server control unit,
Wherein the handover command is included in an Extension field of a management object in a message based on an Open Mobile Alliance-Device Management (OMA-DM) protocol and is provided to the terminal device. delete A policy request step of requesting a policy related device for a handover policy for performing heterogeneous network handover;
Providing information on network environment of the neighboring network to the policy-related device when the predetermined information providing time is reached; And
Performing a handover process based on a handover policy and a handover command that are returned in response to a handover policy request to access a corresponding one of the other network networks,
The handover performing step includes:
Is determined by reflecting at least any one of a channel state of an access network and a degree of resource saturation of a network to be handed over with respect to a current access network of the corresponding terminal according to the handover policy and a network network to be handed over And performing a handover process according to the handover command including a handover time. delete delete A policy setting information storing step of storing previously defined policy setting information; And
Providing a handover policy determined in accordance with the previously stored policy setting information in response to a handover policy request from a specific terminal device to the terminal device and transmitting the network operation status information determined based on the network environment information from the terminal device And a request response step of providing a handover command to the terminal device based on the request,
Wherein the request response step comprises:
The channel state of the access network and the degree of resource saturation of the network to be handed over based on the network operation status information of the current access network and the network to be handed over according to the determined handover policy Wherein the handover command is generated by determining a handover time by reflecting one of the handover times and instructing to perform a handover process according to the determined handover time. delete delete delete delete delete

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