KR101562786B1 - Apparatus and method for simultaneously transmitting data in heterogeneous network - Google Patents

Abstract

The present invention discloses a heterogeneous network-based data concurrent transmission service method. A partial data reception step of receiving, through two or more networks, partial data segmented from transmission target data according to a data transmission rate for each access network set based on a network selection policy stored in association with predefined subscription free-form information; A switching setting step of switching the data transmission rate assigned to the specific access network to the remaining access network and setting the data transmission rate to the remaining access network when an abnormality occurs in the specific access network among the two or more access networks; A reset request step of requesting the terminal to reset the data transmission rate for each access network based on the subscription free-form information when data transmission to the specific access network is resumed within a set time; And a transmission rate restoration step of restoring, by the management apparatus, a data transmission rate for each access network based on a network selection policy stored corresponding to the subscription free-form information, If the data transmission is resumed within the set time in the transmission suspension state, the same network selection policy applied before the data transmission suspension state is acquired by immediately restarting the simultaneous transmission service by reflecting the network selection policy according to the predefined subscription free- It is possible to prevent duplication of operations.

Description

TECHNICAL FIELD [0001] The present invention relates to a heterogeneous network-based data concurrent transmission service method and a device applied thereto. [0002]

More particularly, the present invention relates to a method and system for simultaneously transmitting data in a heterogeneous network environment in which a data transmission is resumed within a set time in a data transmission stop state for a corresponding access network upon detection of an abnormality in a specific access network The present invention relates to a heterogeneous network-based data simultaneous transmission service method for providing a simultaneous transmission service based on a network selection policy corresponding to predefined subscription free-form information, and a method of operating the management apparatus and the management apparatus.

Recently, operators often provide services based on multiple wireless technologies at the same time. In Korea, major operators are building and servicing networks by introducing WCDMA, CDMA, WiBro and WLAN (WiFi) technology, which is the nearest wireless network. In addition, LTE (Long Term Evolution) network is actively being introduced recently.

The present method in which a terminal device uses a data service in a heterogeneous network environment in which a plurality of networks are mixed is a method in which a controllability of a provider is excluded by an access network selection method by directly changing a terminal device user It is a passive method when considering the position of the business operator.

Meanwhile, as various wireless devices such as smartphones and tablet PCs are increasing and data rates are becoming cheaper, and at the same time, various large-capacity data services are increasing, the network load ratio of operators is rapidly rising, It is a threat from the side.

Accordingly, there is a need for a new service method for efficiently selecting an access network of a terminal device according to the state of a network in a heterogeneous network environment where a plurality of networks are mixed and efficiently transmitting data using the selected network.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method and system for transmitting / receiving data according to a data transmission rate of a connection network set based on a network selection policy stored corresponding to pre- When the management apparatus receives an error of a specific access network among the two or more access networks, switches the data transmission rate assigned to the specific access network to the remaining access network and sets it Requesting to reset a data transmission rate for each access network based on the subscription free-form information when the terminal device resumes data transmission to the specific access network within a set time, and the management device requests the access- Correspondingly stored network selection The data transmission is resumed within the set time in the state of stopping data transmission to the corresponding access network due to detection of abnormality of the specific access network And to provide a simultaneous transmission service based on a network selection policy corresponding to predefined subscription free-form information.

It is another object of the present invention to provide a data transmission rate for two or more access networks based on a network selection policy stored corresponding to free-to- And a control unit configured to switch a data transmission rate assigned to the specific access network to a remaining access network and to switch the specific access network to a data transfer suspension state when an abnormality occurs in a specific access network among the two or more access networks, The present invention provides a management apparatus and an operation method thereof for recovering a data transmission rate for each access network by reflecting a network selection policy stored corresponding to the access-free-type information when data transmission to the access network is resumed, The access network The stop data transmission for greater state, if the data transmission resumed within a set time period to provide a broadcast service based on the network selection policy corresponding to a given subscriber Freestyle information.

It is another object of the present invention to provide a method and apparatus for transmitting data to be transmitted according to a data transmission rate set for each access network based on a network selection policy stored corresponding to pre- Wherein the data transmission rate assigned to the specific access network is set to be switched to the remaining access network when an abnormal occurrence of the specific access network among the two or more access networks is detected, When the data transmission to the specific access network is resumed within the set time, the data transmission rate of each access network is recovered according to the network selection policy stored corresponding to the access free-form information Ha When a data transmission is resumed within a set time in a data transmission stop state for a corresponding access network due to an abnormality detection of a specific access network by providing a terminal apparatus and an operation method thereof, And to provide a simultaneous transmission service on the basis thereof.

According to a first aspect of the present invention, there is provided a management apparatus configured to set a data transmission rate for two or more access networks based on a network selection policy stored corresponding to free-to-join information of a terminal device, A policy setting unit for switching and setting a data transmission rate assigned to the specific access network to the remaining access networks when an error occurs in a specific access network among the networks; A control unit for selecting partial data segmented from transmission target data based on the set data transmission rate for each access network; And a communication unit for dividing and transmitting the selected partial data through two or more networks, wherein the policy setting unit sets, in a set time, And when the data transmission to the access network is resumed, the data transmission rate for each access network is restored by reflecting the network selection policy stored corresponding to the access-free-type information.

Preferably, the policy setting unit may provide the subscription free-form information to the terminal apparatus according to a data transmission stop request for the specific access network received from the terminal apparatus when the specific access network is abnormal, When a data transfer resumption request including the provided subscription-free-form information is received from the terminal apparatus according to the resumption of data transfer to the specific access network within a predetermined period of time based on the network selection policy stored corresponding to the received subscription-free- And restores a data transmission rate for each access network.

Preferably, the policy setting unit may acquire a new network selection policy from the policy management apparatus that determines the network selection policy, when the subscription free type information is not received from the terminal apparatus within the set time, Is restored.

In order to achieve the above object, according to a second aspect of the present invention, there is provided a terminal device for transmitting, to a terminal device, Via two or more networks; And generating a transmission object data by combining partial data received for each access network. When an abnormal occurrence of a specific access network among the two or more access networks is detected, When the data transmission to the specific access network is resumed within the set time, the control unit resets the specific access network to the data transfer suspension state, And the data transmission rate for each access network is recovered according to the network selection policy.

Preferably, when an abnormal occurrence of the specific access network is detected, the control unit transmits a data transmission stop request to the specific access network to the management apparatus, receives the subscription free-form information from the management apparatus, And transmits a data transfer resume request including the stored subscription free-form information to the management apparatus when the data transfer to the specific access network is resumed within the set time period, according to the network selection policy stored corresponding to the subscription free- So that the data transmission rate per access network is restored.

Preferably, when the data transmission to the specific access network is resumed after the set time has elapsed, the control unit deletes the stored subscription free-form information and transmits a data transfer resume request to the management apparatus, And the data transmission rate for each access network is recovered according to a new network selection policy provided from the policy management apparatus that determines the network selection policy.

According to a third aspect of the present invention, there is provided a simultaneous heterogeneous network-based data concatenation service method comprising the steps of: A partial data receiving step of receiving partial data segmented from transmission target data through two or more networks; A switching setting step of switching the data transmission rate assigned to the specific access network to the remaining access network and setting the data transmission rate to the remaining access network when an abnormality occurs in the specific access network among the two or more access networks; A reset request step of requesting the terminal to reset the data transmission rate for each access network based on the subscription free-form information when data transmission to the specific access network is resumed within a set time; And a transmission rate recovery step of causing the management apparatus to recover a data transmission rate for each access network based on a network selection policy stored corresponding to the subscription free-form information.

According to a fourth aspect of the present invention, there is provided a method for operating a management device, the method comprising the steps of: setting a transmission rate for setting a data transmission rate for two or more access networks based on a network selection policy stored corresponding to free- Setting step; Setting a data transmission rate assigned to the specific access network to a remaining access network and switching the specific access network to a data transfer stop state when an abnormality occurs in a specific access network among the two or more access networks; And a transmission rate restoration step of restoring a data transmission rate for each access network by reflecting a network selection policy stored corresponding to the subscription free type information when data transmission to the specific access network is resumed within a set time period .

Preferably, the switching setting step provides the subscriber-station-free information to the terminal device in response to a data transmission stop request for the specific access network received from the terminal device when an error occurs in the specific access network .

Preferably, when the data transfer resumption request including the provided subscription-free-form information is received from the terminal apparatus according to the resumption of data transmission to the specific access network within the set time, And restores the data transmission rate for each access network based on the stored network selection policy corresponding to the subscription free form information.

Preferably, the transmission rate restoring step includes a step of, when subscription free type information is not received from the terminal device within the set time, acquiring a new network selection policy from the policy management apparatus that determines the network selection policy, And the transmission rate is restored.

According to a fifth aspect of the present invention, there is provided a method of operating a terminal device, the method comprising the steps of: dividing transmission target data according to a data transmission rate set for each access network based on a network selection policy stored corresponding to pre- A partial data receiving step of receiving the partial data through two or more networks; Setting a data transmission rate assigned to the specific access network to be switched to the remaining access network when an abnormal occurrence of the specific access network among the two or more access networks is detected, ; And a transmission rate restoration step of restoring a data transmission rate for each access network according to a network selection policy corresponding to the subscription free-form information when data transmission to the specific access network is resumed within a set time period do.

Preferably, in the switching setting step, when an abnormal occurrence of the specific access network is detected, a request to stop the data transmission to the specific access network is transmitted to the management apparatus, and the subscription free-form information is received from the management apparatus .

Preferably, the transmission rate restoring step includes, when the data transmission to the specific access network is resumed within the set time, transmitting a data transfer resume request including the stored subscribe free information to the management device, The data transmission rate for each access network is recovered according to the stored network selection policy corresponding to the free type information.

Preferably, the transmission rate restoring step deletes the stored subscription free-form information when the data transmission to the specific access network is resumed after the set time elapses, and transmits a data transfer resume request to the management apparatus And the data transmission rate for each access network is recovered according to a new network selection policy provided from the policy management apparatus for determining the network selection policy.

According to the heterogeneous network-based data concurrent transmission service method of the present invention, in a heterogeneous network environment, data transmission is resumed within a set time in a data transmission stop state for a corresponding access network due to an abnormality of a specific access network It is possible to prevent duplication of operations for acquiring the same network selection policy applied before the data transmission suspension state by restarting the simultaneous transmission service by immediately reflecting the network selection policy according to the predefined subscription free form information, It can effectively transfer traffic to improve data service quality and secure network stability.

1 is a schematic configuration diagram of a heterogeneous network-based data concurrent transmission service system according to an embodiment of the present invention;
2 is a schematic configuration diagram of a management apparatus according to an embodiment of the present invention;
3 is a schematic configuration diagram of a terminal device according to an embodiment of the present invention;
FIG. 4 is a schematic flowchart illustrating a method of operating a heterogeneous network-based data concurrent transmission service system according to an embodiment of the present invention; FIG.
FIG. 5 is a schematic flowchart for explaining the operation of the management apparatus according to the embodiment of the present invention; FIG.
6 is a schematic flowchart for explaining an operation of a terminal device according to an embodiment of the present invention;

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

FIG. 1 shows a schematic configuration diagram of a heterogeneous network-based data concurrent transmission service system according to an embodiment of the present invention.

As shown in FIG. 1, the heterogeneous network-based data concurrent transmission service system according to the present invention divides data into two or more pieces of partial data, adds first partial data corresponding to a part of the two or more partial data, A management apparatus (100) in a transmitting apparatus that transmits the virtual network connection information including the virtual network connection information to the second partial data corresponding to another part of the two or more partial data, A first network device 200 receiving the first partial data, a second network device 300 receiving the second partial data from the management device 100, and a second network device 300 receiving the second partial data from the first network device 200, 1 partial data and receives the second partial data from the second network device 300, and receives the first partial data and the virtual data included in the second partial data And a terminal device (400) as a receiving device for generating the data by combining the first partial data and the second partial data according to the specific virtual network connection information based on the network connection information. The heterogeneous network-based data concurrent transport service system according to the present invention may further include an external device 500 for transferring the data to the management device 100 and requesting delivery to the terminal device 400, a policy management device 600).

The heterogeneous network-based data concurrent transfer service according to the present invention implements a configuration in which data is transmitted and received between the terminal device 400 and the external device 500, and data is transmitted and received using a plurality of heterogeneous networks.

Accordingly, in the present invention, the session is divided in the management apparatus 100 to implement simultaneous link transmission over a plurality of heterogeneous networks for one session. At this time, since the terminal device 400 is connected to each of the plurality of heterogeneous networks, the management apparatus 100 recognizes that one terminal device 400 is linked to each of the simultaneous links through the plurality of heterogeneous networks, It must be managed by the terminal device 400, that is, a single entity. For this purpose, it is inevitably required to allocate and manage additional virtual network connection information (e.g., virtual IP) for the coexistent transmission service in correspondence with the terminal device 400. [

Here, the external device 500 refers to a server device that performs data transmission / reception with the terminal device 400 through the management device 100, and transmits / receives data through the management device 100 to the terminal device 400 For example, various services such as a portal service and a content providing service can be provided.

The policy management apparatus 600 determines the network selection policy including the data transmission rate for each network set corresponding to the terminal apparatus 400 and provides the network selection policy to the management apparatus 100 and the terminal apparatus 400. Here, the network selection policy provided to the management apparatus 100 is applied to the downlink operation in which the management apparatus 100 is the subject of data transmission. In addition, in the case of the network selection policy provided to the terminal apparatus 400, 400 is applied to the uplink operation which is the subject of data transmission.

The heterogeneous networks may be various access networks including, for example, WCDMA, CDMA, WiBro, WLAN (WiFi) and LTE (Long Term Evolution), but in the present embodiment, (Hereinafter referred to as a " WiFi network ") which refers to a first network (hereinafter referred to as a 3G network) and a second wireless network (WiFi)

Accordingly, the first network device 200 refers to a 3G network, that is, a Gateway GPRS Support Node (GGSN) for operating a wireless packet service network. In addition, the second network device 300 includes a WiFi network, And an access point (AP) for operating a short-range wireless network.

In addition, the management apparatus 100 and the terminal apparatus 400 may be a transmission apparatus according to a service flow, i.e., a subject that transmits data using a simultaneous data transmission service, that is, according to an uplink process and a downlink process , Or a receiving device. In the present embodiment, for convenience of explanation, a management apparatus 100 as a transmission apparatus that is located in a heterogeneous network environment and provides a simultaneous data transmission service to the terminal apparatus 400 will be described on the assumption that the management apparatus 100 and data A terminal apparatus 400 as a receiving apparatus for performing transmission and reception will be described.

The management apparatus 100 sets a data transmission rate for each access network based on the stored network selection policy corresponding to the subscription free form information of the terminal apparatus 400. [

In other words, the management apparatus 100 can determine whether or not to correspond to the subscription-free-form information divided and classified according to various criteria including, for example, whether a specific service subscriber (for example, unlimited data service), a service fee plan, and a heavy user The network selection policy is received and stored from the policy management apparatus 600, and based on the stored network selection policy, a first transmission rate for data transmission to the first network device 200 and a first transmission rate for the second network device 300 A second transmission rate for transmission is set. At this time, according to the network selection policy determined in accordance with the network selection policy determined according to the subscription-free type information, the management apparatus 100 transmits the relative utilization ratio of the 3G network and the WiFi network to, for example, 10% of the 3G network: 90% of the WiFi network, , 50% of 3G network: 50% of WiFi network, 100% of 3G network: 0% of WiFi network and 0% of 3G network: 100% of WiFi network.

On the other hand, when an abnormality occurs in the WiFi network, the management apparatus 100 switches and sets the data transmission rate specified in the WiFi network.

That is, when no traffic occurs in the WiFi network during the set time (for example, 1 minute) through the WiFi network among the 3G network and the WiFi network, the management apparatus 100 receives the WiFi network (WiFi Pause) to the first network device 200 located in the 3G network. Accordingly, the management apparatus 100 can transmit the second transmission rate for data transmission to the second network device 300 located in the WiFi network to the first network device 200 located in the 3G network, By switching and setting the data transmission rate for each network, the WiFi network is switched to the data transmission stop state. At this time, the management apparatus 100 transmits a response message (WiFi Pause Ack) corresponding to the data transmission stop request (WiFi Pause) to the terminal device 400 in response to switching the WiFi network to the data transmission stop state, The response message includes the subscription-free type information for the terminal apparatus 400.

Further, the management apparatus 100 restores the data transmission rate per access network when the data transmission is resumed in the data transmission stop state for the WiFi network.

That is, when the data transmission to the WiFi network is resumed within the set time through the recovery from the data transmission stop state for the WiFi network, the management apparatus 100 transmits a notification message (Refresh). Thereafter, when receiving a data transfer resume request (WiFi Resume) including the provided subscription-free-form information from the terminal device 400, the management apparatus 100 sets a network selection policy stored corresponding to the received subscription-free- The transmission rate for each access network before the data transmission stop state, that is, the first transmission rate for data transmission to the first network device 200 and the data rate to the second network device 300 Lt; RTI ID = 0.0 > transmission rate. ≪ / RTI > On the other hand, when the data transmission to the WiFi network is resumed after the set time has elapsed, the management device 100 receives a data transfer resume request (WiFi Resume) that does not include the subscription free form information from the terminal device 400 Accordingly, the updated network selection policy is obtained from the policy management apparatus 600 in consideration of the variation of the network environment with the elapse of the set time, thereby setting the transmission rate for each access network.

In addition, the management apparatus 100 selects the segmented partial data from the transmission object data to provide the simultaneous transmission service corresponding to the subscription-free-form information.

That is, the management apparatus 100 divides the transmission data according to the data transmission rate for each connection network in order to transmit the transmission object data transmitted from the external apparatus 500 to the terminal apparatus 400 as the destination. In other words, the management apparatus 100 has a first transmission rate for data transmission to the first network device 200 set according to the subscription free-form information of the terminal apparatus 400, and a second transmission rate for data transmission to the second network apparatus 300 Selects the first partial data to be transmitted to the first network device 200 among the divided partial data based on the confirmed transmission rate and selects the second partial data to be transmitted to the second network device 300 among the remaining partial data, The second partial data to be transmitted is selected. The management device 100 transmits the second partial data to be transmitted to the second network device 300 to the first network device 200 according to the converted data transmission rate of the connected access network, As shown in FIG.

In addition, the management apparatus 100 transmits the selected partial data classified according to the access-free type using the corresponding network.

That is, the management apparatus 100 transmits the partial data selected by the service type, that is, the first partial data to the first network device 200 located in the 3G network, And transmits the first partial data to the terminal apparatus 400 as a receiving apparatus. Then, the management apparatus 100 transmits the second partial data to the specific second network device 300 selected based on the connection target network device information, and causes the second network device 300 to receive the second partial data To the terminal device 400 as a device.

The terminal device 400 receives data divided and transmitted from the first network device 200 and the second network device 300 according to the data transmission rate of the access network set based on the network selection policy and restores the data.

That is, the terminal device 400 receives the first partial data from the first network device 200 according to the data transmission rate of the access network set based on the stored network selection policy corresponding to the pre-designated subscription free-form information, By receiving the second partial data from the apparatus 300 and combining the first partial data and the second partial data based on the received first partial data and the virtual network connection information included in the second partial data to generate data, The management apparatus 100 restores the transfer target data to be transferred. In other words, the terminal device 400 recognizes the first partial data and the second partial data having the same virtual network connection information based on the virtual network connection information included in the received partial data, By combining and combining them in accordance with the order information, original transfer target data can be generated.

On the other hand, when an error occurs in the WiFi network, the terminal device 400 switches and sets the data transmission rate specified in the WiFi network.

That is, when no traffic occurs in the WiFi network, for example, during the set time (for example, 1 minute) via the WiFi network, among the 3G network and the WiFi network, the terminal device 400 transmits a data transmission stop request (WiFi Pause) to the management apparatus 100 via the first network device 200 located in the 3G network, thereby switching the WiFi network to the data transfer suspension state. Accordingly, the terminal device 400 receives a response message (WiFi Pause Ack) including the subscription free-form information of the terminal device 400 in response to the data transmission stop request (WiFi pause) from the management device 100 , The subscription free form information included in the corresponding response message (WiFi Pause Ack) is stored for the set time.

In addition, the terminal device 400 allows the data transmission rate of the access network to be restored when the data transmission is resumed in the data transmission stop state for the WiFi network.

That is, when the data transmission to the WiFi network is resumed within the set time within the data transmission stop state for the WiFi network, the terminal device 400 transmits a notification message (Refresh) to inform the resumption of data transmission from the management device 400, . Thereafter, the terminal device 400 transmits a data transfer resume request (WiFi Resume) including the stored subscription free-form information to the management apparatus 100, and thereby, based on the stored network selection policy corresponding to the transferred subscription free- The data transmission rate for each access network, that is, the transmission rate for each access network before the data transmission suspension state is restored. When the set time elapses, the terminal device 400 deletes the subscription free-form information stored therein. Thereafter, the terminal device 400 transmits a notification message (hereinafter referred to as " When the policy management apparatus 600 receives a request for resuming data transmission (WiFi Resume) that does not include subscription free-form information to the management apparatus 100, Based on the updated network selection policy provided by the network selection policy.

Hereinafter, the management apparatus 100 according to the embodiment of the present invention will be described in more detail with reference to FIG.

That is, the management apparatus 100 includes a policy setting unit 110 for setting a data transmission rate for each access network based on a stored network selection policy corresponding to the free-form information of the terminal 400, A control unit 120 for selecting partial data segmented from transmission target data corresponding to a free-access subscription type, and a communication unit 130 for dividing and transmitting the selected partial data through one or more heterogeneous networks. Here, the communication unit 130 refers to a communication module for interfacing with the first network device 200 using the 3G network and interworking with the second network device 300 using the WiFi network.

The policy setting unit 110 sets the data transmission rate for each access network based on the stored network selection policy corresponding to the subscription free type information of the terminal device 400. [

That is, the policy setting unit 110 corresponds to the subscribed free-form information classified by various criteria including, for example, whether a specific service subscriber (for example, unlimited data service), a service fee plan, and a heavy user Based on the stored network selection policy, a first transmission rate for data transmission to the first network device 200 and a second transmission rate for data transmission to the second network device 300 based on the stored network selection policy, And sets a second transmission rate for data transmission. At this time, according to the network selection policy determined in accordance with the network selection policy determined according to the subscription-free type information, the management apparatus 100 transmits the relative utilization ratio of the 3G network and the WiFi network to, for example, 10% of the 3G network: 90% of the WiFi network, , 50% of 3G network: 50% of WiFi network, 100% of 3G network: 0% of WiFi network and 0% of 3G network: 100% of WiFi network.

The control unit 120 selects the segmented partial data from the transmission target data to provide the simultaneous transmission service corresponding to the subscription free-form information.

That is, the control unit 120 divides the transmission data according to the data transmission rate for each connection network in order to transmit the transmission target data transmitted from the external apparatus 500 to the destination terminal apparatus 400. [ In other words, the management apparatus 100 has a first transmission rate for data transmission to the first network device 200 set according to the subscription free-form information of the terminal apparatus 400, and a second transmission rate for data transmission to the second network apparatus 300 Selects the first partial data to be transmitted to the first network device 200 among the divided partial data based on the confirmed transmission rate and selects the second partial data to be transmitted to the second network device 300 among the remaining partial data, The second partial data to be transmitted is selected.

The communication unit 130 transmits the selected partial data divided according to the access free type using the corresponding network.

That is, the communication unit 130 transmits the selected partial data classified in accordance with the service type, that is, the first partial data to the first network device 200 located in the 3G network, 1 partial data to the terminal apparatus 400 as a receiving apparatus. Then, the management apparatus 100 transmits the second partial data to the specific second network device 300 selected based on the connection target network device information, and causes the second network device 300 to receive the second partial data To the terminal device 400 as a device.

On the other hand, when an error occurs in the WiFi network, the policy setting unit 110 switches and sets the data transmission rate specified in the WiFi network.

That is, when no traffic occurs in the WiFi network, for example, during the setup time (for example, 1 minute) through the WiFi network among the 3G network and the WiFi network, the policy setting unit 110 transmits the WiFi And receives a data transmission stop request (WiFi pause) for the network through the first network device 200 located in the 3G network. Accordingly, the policy setting unit 110 may set the second transmission rate for data transmission to the second network device 300 located in the WiFi network to be transmitted through the first network device 200 located in the 3G network By switching and setting the data transmission rate for each access network, the WiFi network is switched to the data transmission suspension state. At this time, the policy setting unit 110 transmits a response message (WiFi Pause Ack) corresponding to the data transmission stop request (WiFi Pause) to the terminal device 400 upon switching the WiFi network to the data transmission stop state, The response message includes the subscription-free-form information for the terminal device 400.

In addition, the policy setting unit 110 restores the data transmission rate for each access network when the data transmission is resumed in the data transmission stop state for the WiFi network.

That is, when the data transmission to the WiFi network is resumed within the set time through the recovery from the data transmission stop state for the WiFi network, the policy setting unit 110 notifies the terminal apparatus 400 of the restart of data transmission And delivers a message (Refresh). If the request for resuming data transmission (WiFi Resume) including the provided subscription-free-form information is received from the terminal device 400, the policy setting unit 110 transmits a network selection policy stored corresponding to the received subscription free- The first transmission rate for data transmission to the first network device 200 and the first transmission rate for the second network device 300 before the data transmission stop state can be restored by restoring the data transmission rate per access network based on the transmission rate And the second transmission rate for data transmission is restored. When the data transmission to the WiFi network is resumed after the set time has elapsed, the policy setting unit 110 transmits a data transfer resume request (WiFi Resume) that does not include the subscription free form information to the terminal device 400 And receives the updated network selection policy from the policy management apparatus 600 in consideration of the variation of the network environment with the elapse of the set time, thereby setting the transmission rate for each access network.

Hereinafter, the terminal device 400 according to the embodiment of the present invention will be described in more detail with reference to FIG.

That is, the terminal apparatus 400 includes a communication unit 410 for receiving partial data segmented from transmission target data through two or more networks, and a control unit 420 for generating the transmission target data by combining partial data received for each access network ). Here, the communication unit 410 refers to a communication module for interfacing with the first network device 200 using the 3G network and interworking with the second network device 300 using the WiFi network. In addition, the control unit 420 has a form mounted on an OS kernel mounted on the terminal device 400, and is configured to transmit a series of data for the data moving service in response to a request of a specific application built in or downloaded and loaded in the terminal device 400 Operation.

The communication unit 410 receives the data segmented and transmitted from the first network device 200 and the second network device 300 according to the data transmission rate of the access network set based on the network selection policy.

That is, the communication unit 410 receives the first partial data from the first network device 200 according to the data transmission rate of the access network set based on the stored network selection policy corresponding to the pre-designated subscription free-form information, And receives the second partial data from the second partial data processing unit 300.

The control unit 420 restores the data received through the first network device 200 and the second network device 300.

That is, the control unit 420 generates the data by combining the first partial data and the second partial data based on the received first partial data and the virtual network connection information included in the second partial data, The transmission target data to be transmitted is restored. In other words, the control unit 420 recognizes the first partial data and the second partial data having the same virtual network connection information based on the virtual network connection information included in the received partial data, and stores them in an order By combining and combining them according to the information, original transfer target data can be generated.

On the other hand, when an abnormality occurs in the WiFi network, the control unit 420 switches the data transmission rate assigned to the WiFi network to be set.

That is, when no traffic occurs in the WiFi network, for example, during the setup time (e.g., 1 minute) through the WiFi network among the 3G network and the WiFi network, the control unit 420 transmits a data transmission stop request WiFi Pause) to the management device 100 via the first network device 200 located in the 3G network, thereby switching the WiFi network to the data transfer suspension state. Accordingly, the control unit 420 receives a response message (WiFi Pause Ack) including the subscription free-form information of the terminal 400 in response to the data transmission stop request (WiFi pause) from the management apparatus 100, The subscription free form information included in the corresponding response message (WiFi Pause Ack) is stored for the set time.

Further, the control unit 420 allows the data transmission rate for each access network to be restored when the data transmission is resumed in the data transmission stop state for the WiFi network.

That is, when the data transmission to the WiFi network is resumed within the set time within the data transmission stop state for the WiFi network, the control unit 420 transmits a notification message (Refresh) to inform the resumption of data transmission from the management apparatus 400 . Thereafter, the control unit 420 transmits a data transfer resume request (WiFi Resume) including the stored subscription free-form information to the management apparatus 100, thereby generating a connection based on the network selection policy stored corresponding to the subscribe free- The data transmission rate per network, that is, the transmission rate per access network before the data transmission suspension state is restored. When the set time elapses, the control unit 420 deletes the stored subscription-free type information. Then, the control unit 420 transmits a notification message (Refresh) to inform the resuming of data transmission from the management apparatus 400 according to the resumption of data transmission to the WiFi network (WiFi Resume), which does not include the subscription free-form information, to the management apparatus 100, the policy management apparatus 600 receives the WiFi resume request from the policy management apparatus 600 in consideration of the change of the network environment over the set time period The transmission rate for each access network can be set based on the updated network selection policy provided.

As described above, according to the heterogeneous network-based simultaneous data transmission service system according to the present invention, in a heterogeneous network environment, in a data transmission stop state for a corresponding access network due to a fault detection of a specific access network, The network selection policy based on the predefined subscription free-form information is immediately reflected to resume the simultaneous transmission service, thereby preventing duplication of operations for acquiring the same network selection policy applied prior to the data transmission suspension state In addition, data traffic can be efficiently transferred to improve data service quality and secure network stability.

Hereinafter, a heterogeneous network-based data concurrent transmission service method according to an embodiment of the present invention will be described with reference to FIG. 4 to FIG. Here, the configurations shown in FIGS. 1 to 3 will be described with reference to corresponding reference numerals for convenience of explanation.

First, referring to FIG. 4, a description will be made of a method of operating a heterogeneous network-based data concurrent transmission service system according to an embodiment of the present invention.

First, the management apparatus 100 sets a data transmission rate for each access network based on the network selection policy stored corresponding to the free-form information of the terminal device 400 (S110-S130).

Preferably, the management apparatus 100 is configured to determine whether or not the subscription free-form information specified by the various criteria including the presence or absence of a specific service subscriber (e.g., unlimited data service), a service plan, and a heavy user Receives and stores a corresponding network selection policy from the policy management apparatus 600, and determines a first transmission rate for data transmission to the first network device 200 based on the stored network selection policy, Lt; RTI ID = 0.0 > transmission rate. ≪ / RTI > At this time, according to the network selection policy determined in accordance with the network selection policy determined according to the subscription-free type information, the management apparatus 100 transmits the relative utilization ratio of the 3G network and the WiFi network to, for example, 10% of the 3G network: 90% of the WiFi network, , 50% of 3G network: 50% of WiFi network, 100% of 3G network: 0% of WiFi network and 0% of 3G network: 100% of WiFi network.

Then, the management apparatus 100 selects the segmented partial data from the transmission object data to provide the simultaneous transmission service corresponding to the subscription free-form information (S140-S150).

Preferably, the management apparatus 100 divides the transmission data according to the data transmission rate for each connection network in order to deliver the transmission target data transmitted from the external apparatus 500 to the destination terminal apparatus 400. [ In other words, the management apparatus 100 has a first transmission rate for data transmission to the first network device 200 set according to the subscription free-form information of the terminal apparatus 400, and a second transmission rate for data transmission to the second network apparatus 300 Selects the first partial data to be transmitted to the first network device 200 among the divided partial data based on the confirmed transmission rate and selects the second partial data to be transmitted to the second network device 300 among the remaining partial data, The second partial data to be transmitted is selected.

Then, the management apparatus 100 transmits the partial data selected and divided according to the free form using the corresponding network (S160).

Preferably, the management device 100 transmits the partial data selected in accordance with the type of service, that is, the first partial data to the first network device 200 located in the 3G network, To transmit the first partial data to the terminal apparatus 400 as a receiving apparatus. Then, the management apparatus 100 transmits the second partial data to the specific second network device 300 selected based on the connection target network device information, and causes the second network device 300 to receive the second partial data To the terminal device 400 as a device.

Next, the terminal device 400 receives data divided and transmitted from the first network device 200 and the second network device 300 according to the data transmission rate of the access network set based on the network selection policy, and restores the data (S170).

Preferably, the terminal device 400 receives the first partial data from the first network device 200 according to the data transmission rate of the access network set based on the network selection policy stored in correspondence with the predefined subscription free-form information, 2 network device 300 and combines the first partial data and the second partial data based on the received first partial data and the virtual network connection information included in the second partial data to generate data Thereby restoring the transfer target data to be transferred by the management apparatus 100. [ In other words, the terminal device 400 recognizes the first partial data and the second partial data having the same virtual network connection information based on the virtual network connection information included in the received partial data, By combining and combining them in accordance with the order information, original transfer target data can be generated.

On the other hand, when the terminal device 400 generates an error in the WiFi network, the data transmission rate designated in the WiFi network is switched and set (S180-S190).

Preferably, the terminal device 400 transmits data to the WiFi network when no traffic occurs in the WiFi network out of the 3G network and the WiFi network, for example, for a set time (for example, one minute) via the WiFi network (WiFi Pause) to the management device 100 via the first network device 200 located in the 3G network, thereby switching the WiFi network to the data transfer suspension state.

In this regard, the management apparatus 100 switches and sets the data transmission rate specified in the WiFi network (S200 - S210).

The management device 100 may transmit the data to the second network device 300 located in the WiFi network in response to a data transmission stop request (WiFi pause) for the WiFi network received from the terminal device 400 2 transmission rate is switched by setting the data transmission rate for each connection network so that it can be transmitted through the first network device 200 located in the 3G network, thereby switching the WiFi network to the data transmission suspension state. At this time, the management apparatus 100 transmits a response message (WiFi Pause Ack) corresponding to the data transmission stop request (WiFi Pause) to the terminal device 400 in response to switching the WiFi network to the data transmission stop state, The response message includes the subscription-free type information for the terminal apparatus 400.

Then, when the terminal device 400 resumes data transmission in the data transmission stop state for the WiFi network, the data transmission rate for each access network is restored (S220 - S230).

Preferably, when the data transmission to the WiFi network is resumed within the set time in the data transmission stop state for the WiFi network, the terminal device 400 transmits a notification message Refresh) is received. Thereafter, the terminal device 400 transmits a data transfer resume request (WiFi Resume) including the stored subscription free-form information to the management apparatus 100, and thereby, based on the stored network selection policy corresponding to the transferred subscription free- The data transmission rate for each access network, that is, the transmission rate for each access network before the data transmission suspension state is restored.

In this regard, the management apparatus 100 restores the data transmission rate for each connection network (S240).

Preferably, when the management apparatus 100 receives a data transfer resume request (WiFi Resume) including the provided subscription-free-form information from the terminal apparatus 400, the management apparatus 100 transmits a network selection policy The first transmission rate for data transmission to the first network device 200 and the transmission rate for each connection network before the data transmission stop state and the second transmission rate for the second network device 300, Lt; RTI ID = 0.0 > transmission rate. ≪ / RTI > On the other hand, when the data transmission to the WiFi network is resumed after the set time has elapsed, the management device 100 receives a data transfer resume request (WiFi Resume) that does not include the subscription free form information from the terminal device 400 Accordingly, the updated network selection policy is obtained from the policy management apparatus 600 in consideration of the variation of the network environment with the elapse of the set time, thereby setting the transmission rate for each access network.

Hereinafter, an operation method of the management apparatus 100 according to an embodiment of the present invention will be described with reference to FIG.

First, the data transmission rate for each access network is set based on the network selection policy stored corresponding to the free-form information of the subscriber station 400 (S310-S320).

Preferably, the policy setting unit 110 may set the policy information for the subscription free-form information (hereinafter referred to as " subscription-free information ") specified by various criteria including, for example, whether a specific service subscriber (e.g., unlimited data service) From the policy management apparatus 600, a first transmission rate for data transmission to the first network device 200 based on the stored network selection policy and a second transmission rate for data transmission to the second network device 300 The second transmission rate for data transmission is set. At this time, according to the network selection policy determined in accordance with the network selection policy determined according to the subscription-free type information, the management apparatus 100 transmits the relative utilization ratio of the 3G network and the WiFi network to, for example, 10% of the 3G network: 90% of the WiFi network, , 50% of 3G network: 50% of WiFi network, 100% of 3G network: 0% of WiFi network and 0% of 3G network: 100% of WiFi network.

Then, in order to provide a simultaneous transmission service corresponding to the subscription free-form information, the partial data segmented from the transmission subject data is selected (S330).

Preferably, the control unit 120 divides the transmission data according to the data transmission rate for each connection network, in order to transmit the transmission target data transmitted from the external apparatus 500 to the destination terminal apparatus 400. In other words, the management apparatus 100 has a first transmission rate for data transmission to the first network device 200 set according to the subscription free-form information of the terminal apparatus 400, and a second transmission rate for data transmission to the second network apparatus 300 Selects the first partial data to be transmitted to the first network device 200 among the divided partial data based on the confirmed transmission rate and selects the second partial data to be transmitted to the second network device 300 among the remaining partial data, The second partial data to be transmitted is selected.

Then, the partial data selected and divided according to the access free form is transmitted using the corresponding network (S340).

Preferably, the communication unit 130 transmits the selected partial data classified in accordance with the service type, that is, the first partial data to the first network device 200 located in the 3G network, to the first network device 200 To transmit the first partial data to the terminal apparatus 400 as a receiving apparatus. Then, the management apparatus 100 transmits the second partial data to the specific second network device 300 selected based on the connection target network device information, and causes the second network device 300 to receive the second partial data To the terminal device 400 as a device.

On the other hand, when an abnormality occurs in the WiFi network of the access network, the data transfer rate designated to the WiFi network is switched and set (S350-S360).

Preferably, the policy setting unit 110 sets the policy setting unit 110 to the terminal device 400 when no traffic occurs in the WiFi network, for example, during the setup time (for example, 1 minute) through the WiFi network among the 3G network and the WiFi network. (WiFi Pause) for the WiFi network from the first network device 200 located in the 3G network. Accordingly, the policy setting unit 110 may set the second transmission rate for data transmission to the second network device 300 located in the WiFi network to be transmitted through the first network device 200 located in the 3G network By switching and setting the data transmission rate for each access network, the WiFi network is switched to the data transmission suspension state. At this time, the policy setting unit 110 transmits a response message (WiFi Pause Ack) corresponding to the data transmission stop request (WiFi Pause) to the terminal device 400 upon switching the WiFi network to the data transmission stop state, The response message includes the subscription-free-form information for the terminal device 400.

Thereafter, when the data transmission is resumed in the data transmission stop state for the WiFi network, the data transmission rate for each access network is restored (S370-S410).

Preferably, when the data transmission to the WiFi network is resumed within the set time, the policy setting unit 110 informs the terminal device 400 of the resumption of data transmission through recovery from the data transmission stop state for the WiFi network And transmits a notification message (Refresh). If the request for resuming data transmission (WiFi Resume) including the provided subscription-free-form information is received from the terminal device 400, the policy setting unit 110 transmits a network selection policy stored corresponding to the received subscription free- The first transmission rate for data transmission to the first network device 200 and the first transmission rate for the second network device 300 before the data transmission stop state can be restored by restoring the data transmission rate per access network based on the transmission rate And the second transmission rate for data transmission is restored. When the data transmission to the WiFi network is resumed after the set time has elapsed, the policy setting unit 110 transmits a data transfer resume request (WiFi Resume) that does not include the subscription free form information to the terminal device 400 And receives the updated network selection policy from the policy management apparatus 600 in consideration of the variation of the network environment with the elapse of the set time, thereby setting the transmission rate for each access network.

Hereinafter, an operation method of the terminal device 400 according to the embodiment of the present invention will be described with reference to FIG.

First, in step S510, the data is transmitted from the first network device 200 and the second network device 300 according to the data transmission rate of the access network set based on the network selection policy.

Preferably, the communication unit 410 receives the first partial data from the first network device 200 in accordance with the data transmission rate of the access network set based on the network selection policy stored in correspondence with the predefined subscription free-form information, And receives the second partial data from the network device 300.

Then, the data received through the first network device 200 and the second network device 300 are restored (S520).

Preferably, the control unit 420 combines the first partial data and the second partial data based on the received first partial data and the virtual network connection information included in the second partial data to generate data, so that the management apparatus 100 The transmission target data to be transmitted is restored. In other words, the control unit 420 recognizes the first partial data and the second partial data having the same virtual network connection information based on the virtual network connection information included in the received partial data, and stores them in an order By combining and combining them according to the information, original transfer target data can be generated.

On the other hand, when an abnormality occurs in the WiFi network, the data transmission rate assigned to the WiFi network is switched and set (S530-S550).

Preferably, the control unit 420 stops the data transmission to the WiFi network if the WiFi network is out of the 3G network and the WiFi network, for example, when no traffic occurs during the set time (for example, one minute) via the WiFi network (WiFi Pause) to the management device 100 via the first network device 200 located in the 3G network, thereby switching the WiFi network to a data transfer suspension state. Accordingly, the control unit 420 receives a response message (WiFi Pause Ack) including the subscription free-form information of the terminal 400 in response to the data transmission stop request (WiFi pause) from the management apparatus 100, The subscription free form information included in the corresponding response message (WiFi Pause Ack) is stored for the set time.

Thereafter, when the data transmission is resumed in the data transmission stop state for the WiFi network, the data transmission rate for each access network is restored (S560-S590).

If the data transmission to the WiFi network is resumed within the set time in the data transmission stop state for the WiFi network, the control unit 420 transmits a notification message (Refresh ). Thereafter, the control unit 420 transmits a data transfer resume request (WiFi Resume) including the stored subscription free-form information to the management apparatus 100, thereby generating a connection based on the network selection policy stored corresponding to the subscribe free- The data transmission rate per network, that is, the transmission rate per access network before the data transmission suspension state is restored. When the set time elapses, the control unit 420 deletes the stored subscription-free type information. Then, the control unit 420 transmits a notification message (Refresh) to inform the resuming of data transmission from the management apparatus 400 according to the resumption of data transmission to the WiFi network (WiFi Resume), which does not include the subscription free-form information, to the management apparatus 100, the policy management apparatus 600 receives the WiFi resume request from the policy management apparatus 600 in consideration of the change of the network environment over the set time period The transmission rate for each access network can be set based on the updated network selection policy provided.

As described above, according to the heterogeneous network-based simultaneous data transmission service method according to the present invention, in a data transmission stop state for a corresponding access network due to a fault detection of a specific access network in a heterogeneous network environment, The network selection policy based on the predefined subscription free-form information is immediately reflected to resume the simultaneous transmission service, thereby preventing duplication of operations for acquiring the same network selection policy applied prior to the data transmission suspension state In addition, data traffic can be efficiently transferred to improve data service quality and secure network stability.

Meanwhile, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of both. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such that the processor can read information from, and write information to, the storage medium. Alternatively, the storage medium may be integrated into the processor. The processor and the storage medium may be included within an ASIC. The ASIC may be included in the terminal device. Alternatively, the processor and the storage medium may be included as separate components within the terminal device.

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.

According to the heterogeneous network-based data concurrent transmission service system and method of the present invention, data transmission is suspended within a predetermined time period in a data transmission stop state for a corresponding access network due to a fault detection of a specific access network in a heterogeneous network environment The present invention provides a simultaneous transmission service based on a network selection policy corresponding to pre-designated subscription free-form information. Therefore, the present invention overcomes the limitations of the prior art, Or is likely to be industrially applicable because it is capable of being practically and practically obvious.

100: management device
110: Policy setting unit 120:
130:
200: first network device
300: second network device
400: terminal device
410: communication unit 420:
500: External device
600: Policy management device

Claims (15)

A policy setting unit configured to set a data transmission rate for each of two or more access networks based on a stored network selection policy corresponding to subscription free form information of the terminal device;
A control unit for selecting, for each of the two or more access networks, partial data segmented in the transmission object data based on the data transmission rates of the two or more access networks; And
And a communication unit for transmitting the partial data selected for each of the at least two access networks through the at least two access networks,
The policy setting unit,
When a failure occurs in a specific access network among the two or more access networks, a data transmission rate assigned to the specific access network is switched to the remaining access network,
When the data transmission to the specific access network is resumed within the set time in the data transmission stop state for the specific access network due to the occurrence of the abnormality of the specific access network, the network selection policy stored corresponding to the free- And restores the data transmission rate for each of the at least two access networks to a state prior to the data transmission stop state. The method according to claim 1,
The policy setting unit,
And provides the subscription free-form information to the terminal apparatus according to a data transmission stop request for the specific access network received from the terminal apparatus when the specific access network abnormality occurs,
When a data transfer resumption request including the provided subscription-free-form information is received from the terminal apparatus according to the resumption of data transfer to the specific access network within the set time, a network selection policy stored corresponding to the received subscription-free- And restores the data transmission rate for each of the two or more access networks based on the data transmission rate. 3. The method of claim 2,
The policy setting unit,
And acquires a new network selection policy from the policy management apparatus that determines the network selection policy when the subscription-free type information is not received from the terminal apparatus within the set time, thereby recovering the data transmission rate for each of the two or more access networks. Management device. A communication unit for receiving, through the two or more access networks, partial data segmented from the transmission object data according to a data transmission rate of at least two access networks set based on a network selection policy stored corresponding to predefined subscription free-form information; And
The data transmission rate assigned to the specific access network is set to the remaining connection when the occurrence of an abnormality of the specific access network among the two or more access networks is detected, And switching the network to a data transmission stop state,
Wherein,
When the data transmission to the specific access network is resumed within the set time, the data transmission rate for each of the two or more access networks is restored to the data transfer suspension state according to the network selection policy stored corresponding to the access-free- . 5. The method of claim 4,
Wherein,
When the occurrence of an abnormality in the specific access network is detected, transmitting a data transmission stop request for the specific access network to the management apparatus, receiving the subscription free-form information from the management apparatus,
When the data transfer to the specific access network is resumed within a set time, the data transfer resuming request including the stored subscription free-form information is transmitted to the management apparatus, And restores the data transmission rate for each of the two or more access networks. 6. The method of claim 5,
Wherein,
When the data transmission to the specific access network is resumed after the set time has elapsed, the access management server deletes the stored free subscription information and transmits a data transfer resume request to the management apparatus, And the data transmission rate for each of the at least two access networks is recovered according to a new network selection policy provided from the device. delete A transmission rate setting step of setting a data transmission rate for each of two or more access networks based on a stored network selection policy corresponding to the free-form information of the terminal device;
Selecting partial data divided from transmission target data for each of the two or more access networks based on the data transmission rates of the two or more connected access networks and transmitting the partial data selected for each of the two or more access networks through the two or more access networks ;
Setting a data transmission rate assigned to the specific access network to a remaining access network and switching the specific access network to a data transfer stop state when an abnormality occurs in a specific access network among the two or more access networks; And
When the data transmission to the specific access network is resumed within the set time in the data transfer suspension state of the specific access network, the data transfer rate for each of the two or more access networks is reflected by the network selection policy stored corresponding to the access- And a transmission rate restoration step of restoring the transmission rate before the data transmission suspension state. 9. The method of claim 8,
Wherein, in the switching setting step,
And provides the subscriber-station-free information to the terminal device according to a data transmission stop request for the specific access network received from the terminal device when an error occurs in the specific access network. 10. The method of claim 9,
The transmission rate recovery step comprises:
When a data transfer resumption request including the provided subscription-free-form information is received from the terminal apparatus according to the resumption of data transfer to the specific access network within the set time, a network selection policy stored corresponding to the received subscription-free- And restores a data transmission rate for each of the at least two access networks based on the data transmission rate. 10. The method of claim 9,
The transmission rate recovery step comprises:
And acquires a new network selection policy from the policy management apparatus that determines the network selection policy when the subscription-free type information is not received from the terminal apparatus within the set time, thereby recovering the data transmission rate for each of the two or more access networks. The method comprising: A partial data receiving step of receiving, through the two or more access networks, partial data segmented in the transmission object data according to a data transmission rate of at least two access networks set based on a network selection policy stored corresponding to predefined subscription free-form information;
Generating partial transmission data by combining partial data received for each of the at least two access networks; And
Setting a data transmission rate assigned to the specific access network to be switched to the remaining access network when an abnormal occurrence of the specific access network among the two or more access networks is detected, ; And
A data transmission rate for each of the at least two access networks is restored to a state prior to the data transmission stop state according to a network selection policy stored corresponding to the access free-form information, when data transmission to the specific access network is resumed within a set time And a rate recovering step of recovering the rate of the terminal device. 13. The method of claim 12,
Wherein, in the switching setting step,
When the occurrence of an abnormality in the specific access network is detected, a request to stop the data transmission to the specific access network is transmitted to the management apparatus, and the subscription free-form information is received from the management apparatus and is stored Way. 14. The method of claim 13,
The transmission rate recovery step comprises:
When the data transmission to the specific access network is resumed within the set time, the data transfer resuming request including the stored subscription free-form information is transmitted to the management apparatus, and according to the network selection policy stored corresponding to the subscription free- And the data transmission rate for each of the at least two access networks is recovered. 14. The method of claim 13,
The transmission rate recovery step comprises:
When the data transmission to the specific access network is resumed after the set time has elapsed, the access management server deletes the stored free subscription information and transmits a data transfer resume request to the management apparatus, Wherein the data transmission rate for each of the at least two access networks is recovered according to a new network selection policy provided by the device.

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