KR101689718B1 - Apparatus and method for simultaneously transmitting data in heterogeneous network - Google Patents

Abstract

The present invention discloses a method for simultaneously transmitting heterogeneous network-based data. That is, a data transmission step of transmitting partial data segmented from data to be transmitted to a receiving apparatus through two or more access networks; An acknowledgment step of confirming whether or not an operation acknowledgment message transmitted from the receiving apparatus is received to confirm the network status of the specific access network through the specific access network among the two or more access networks; Transmitting a response message corresponding to the operation confirmation message received through the specific access network to the receiving apparatus; And a status checking step of checking a network status of the specific access network based on at least one of a reception status of the response message and a transmission status of the operation confirmation message in the receiver, Can be guaranteed and improved.

Description

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

The present invention relates to a method for simultaneously transmitting data using a heterogeneous network, and more particularly, to a method and system for simultaneously transmitting data using a plurality of heterogeneous networks, The uplink status of the access network is checked based on the reception status of the operation confirmation message (Keep Alive) transmitted for checking the access status of the specific access network designated as the uplink target, The present invention relates to a heterogeneous network-based data concurrent transmission method for determining whether or not to transmit data to a plurality of terminals, and an apparatus and an operation method thereof applied thereto.

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.

In the heterogeneous network environment in which a plurality of networks are mixed, a current method of using a data service through a terminal device is a network selection method by directly changing a terminal device user, and a method in which controllability of a provider is excluded This is a passive approach 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, in a heterogeneous network environment where a plurality of networks are mixed, a new service scheme for efficiently selecting a network of a terminal device according to the state of the network and efficiently using the selected network is desired.

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 an apparatus and method for providing a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data to be transmitted using a plurality of heterogeneous networks , Checks the uplink status of the access network based on the reception status of an operation confirmation message (Keep Alive) transmitted for checking the connection status of a specific access network designated as an uplink target, And determines whether to transmit data to the network.

According to a first aspect of the present invention, there is provided an apparatus for simultaneously transmitting a heterogeneous network-based data, the apparatus comprising: a communication unit for transmitting partial data divided from transmission target data to a receiving apparatus via two or more access networks; And receiving a response message for confirming the network status of the specific access network transmitted from the receiving apparatus through the specific access network among the two or more access networks, And a transmission control unit for confirming a network state of the specific access network determined based on at least one of a transmission state of the operation confirmation message and a reception state of the response message in the reception apparatus .

Preferably, the transmission control section variably sets a partial data transmission rate for each of the two or more access networks according to the network status, or does not use the specific access network.

According to a second aspect of the present invention, there is provided a heterogeneous network-based data transmission / reception apparatus for receiving partial data segmented from transmission target data from a transmission apparatus via two or more access networks, A communication unit for transmitting an operation confirmation message for confirming the network status of the specific access network to the transmission apparatus through the specific access network; And a reception state of a response message transmitted from the transmission apparatus in response to the operation confirmation message received by the transmission apparatus among the transmission state of the operation confirmation message and the transmitted operation confirmation message, And a reception control unit for determining a network status of the network.

Preferably, the reception status of the response message is a reception number of a response message received from the transmission apparatus, the transmission status of the operation confirmation message is a transmission number of the operation confirmation message transmitted to the transmission apparatus, The network status for the specific access network is determined based on a difference between the number of transmission of the operation confirmation message and the number of reception of the response message.

Preferably, the operation confirmation message includes an identifier for identifying a message for confirming a network status with the specific access network.

According to a third aspect of the present invention, there is provided a simultaneous heterogeneous network-based data transmission method comprising: a data transmission step of transmitting partial data segmented from data to be transmitted to a receiving apparatus via two or more access networks; An acknowledgment step of confirming whether or not an operation acknowledgment message transmitted from the receiving apparatus is received to confirm the network status of the specific access network through the specific access network among the two or more access networks; Transmitting a response message corresponding to the operation confirmation message received through the specific access network to the receiving apparatus; And a status checking step of checking the network status of the specific access network based on at least one of a reception status of the response message and a transmission status of the operation confirmation message in the reception apparatus.

Preferably, the method further comprises setting a partial data transmission rate for each of the two or more access networks variably according to the network status, or not using the specific access network.

According to a fourth aspect of the present invention, there is provided a simultaneous heterogeneous network-based data transmission method comprising the steps of: receiving partial data segmented from data to be transmitted from a transmission apparatus through two or more access networks; A message transmission step of transmitting an operation confirmation message for confirming the network status of the specific access network to the transmission apparatus through the specific access network among the two or more access networks; And a reception state of a response message transmitted from the transmission apparatus in response to the operation confirmation message received by the transmission apparatus among the transmission state of the operation confirmation message and the transmitted operation confirmation message, And a status determination step of determining a network status.

Preferably, the reception status of the response message is a reception number of a response message received from the transmission apparatus, the transmission status of the operation confirmation message is a transmission number of the operation confirmation message transmitted to the transmission apparatus, The network status for the specific access network is determined based on a difference between the number of transmission of the operation confirmation message and the number of received response messages.

According to the method of simultaneously transmitting heterogeneous network-based data and the apparatus applied thereto, in an environment providing a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data to be transmitted using a plurality of heterogeneous networks, ) Based on the reception status of an operation confirmation message (Keep Alive) transmitted for checking the connection status of a specific access network designated as a target, and confirms an uplink status for the access network, The transmission performance of the simultaneous transmission service can be guaranteed and improved by interrupting the data transmission to the access network or changing the predetermined data transmission rate for each access network.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a system for simultaneously transmitting data based on heterogeneous networks according to an embodiment of the present invention; FIG.
2 is a schematic configuration diagram of a terminal device according to an embodiment of the present invention;
3 is a schematic configuration diagram of a management apparatus according to an embodiment of the present invention;
4 is a block diagram of a packet according to an embodiment of the present invention;
5 is a schematic flowchart illustrating an operation method of a heterogeneous network-based data concurrent transmission system according to an embodiment of the present invention.
6 is a schematic flowchart for explaining an operation of a terminal device according to an embodiment of the present invention;
FIG. 7 is a schematic flowchart for explaining the operation of the management apparatus according to the embodiment of the present invention; FIG.

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

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

As shown in FIG. 1, the heterogeneous network-based data concurrent transmission system according to the present invention divides data into two or more pieces of partial data, adds a specific virtual network connection to the first partial data corresponding to a part of the two or more partial data, A management apparatus (400) of a transmitting apparatus in which the virtual network access information is included in second partial data corresponding to another part of the at least two partial data, A first network device 200 receiving first partial data, a second network device 300 receiving the second partial data from the management device 400, and a second network device 300 receiving the first partial data from the first network device 200, And receives the second partial data from the second network device (300), and for receiving the first partial data and the virtual network included in the second partial data And a terminal device (100) serving as a receiving device for combining the first partial data and the second partial data according to the specific virtual network connection information based on the access information and generating the data. In addition, the heterogeneous network-based data concurrent transmission system according to the present invention has a configuration including an external device 500 for transferring data to be transmitted to the management apparatus 400 and requesting transmission to the terminal apparatus 100.

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 100 and the external device 500 and transmitted and received using a plurality of heterogeneous networks. Accordingly, in the present invention, the session is divided in the management apparatus 400 in order to realize simultaneous link transmission through a plurality of heterogeneous networks for one session. At this time, since the terminal device 100 is connected to each of the plurality of heterogeneous networks, it is recognized that the management device 400 recognizes that each of the simultaneous links through the plurality of heterogeneous networks is a link of one terminal device 100, It must be managed by the terminal device 100, 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 corresponding to the terminal device 100. [

The external device 500 refers to a server device that transmits and receives data to and from the terminal device 100 through the management device 400. The external device 500 may transmit and receive data to and from the terminal device 100 through the management device 400, Portal service, and content providing service.

The heterogeneous network may be a variety of networks including, for example, WCDMA, CDMA, WiBro, WLAN (WiFi) and Long Term Evolution (LTE) (Hereinafter referred to as a " WiFi network ") that 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.

Also, the terminal device 100 and the management device 400 may be a transmission device 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 this embodiment, for convenience of description, a management apparatus 400 as a transmitting apparatus for providing a data concurrent transmission service to the terminal apparatus 100 in a heterogeneous network environment is assumed, and the management apparatus 400 and the data transmission / Will be described below with reference to a terminal apparatus 100 as a receiving apparatus that performs a receiving operation.

The terminal device 100 receives the partial data segmentarily transmitted from the first network device 200 and the second network device 300.

More specifically, the terminal device 100 receives the first partial data from the management device 400 via the first network device 200 and receives the second partial data through the second network device 300 do. In addition, the terminal device 100 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, The transmission target data to be transmitted is restored. At this time, the terminal device 100 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, The data to be transmitted can be restored by rearranging the data in the order of division based on the information and combining the normally re-arranged partial data.

At this time, the terminal device 100 designates the uplink target network to transmit the network status related information based on partial data reception to the management apparatus 400. [

More specifically, the terminal device 100 receives the first partial data from the management device 400 through the first network device 200, and receives the second partial data through the second network device 300 , An uplink path for transmitting network-related information based on the order information included in each partial data received, that is, a transmission network. For example, the management apparatus 400 transmits the partial data packet of the order information 1, the partial data packet of the order information 4 and 5, and the partial data packet of the order information 2 and 3 through the WiFi network, the order information 6 The terminal device 100 receives the partial data packet of the order information 1 and the partial data packet of the order information 4 and 5 through the first network device 200, A partial data packet of the order information 2, and a partial data packet of the order information 6 are received via the second network device 300. At this time, when partial data packets of the sequence information 2 and 3 are received first through the second network device 300 rather than the partial data packet of the sequence information 1 received through the first network device 200, May designate the WiFi network as a transport network for transmitting network status related information to the management device 400 by determining that the uplink transmission performance of the WiFi network is better than the uplink transmission performance of the 3G network.

Accordingly, the terminal apparatus 100 transmits an operation confirmation message to the management apparatus 400 via the designated uplink target network.

More specifically, the terminal device 100 generates an uplink event, for example, a response message (ACK) in response to partial data packet reception, an intermediate (Duplicate ACK) indicating a retransmission request for a partial data packet that has not been received in the uplink target network, and a session maintenance message (SYN / FIN) for maintaining the session, And transmitted to the management apparatus 400 via the network. In addition, after transmitting the uplink message, the terminal device 100 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, to the second network device 300 To the management apparatus 400 via the network. In this case, as shown in FIG. 4 (b), the operation confirmation message transmitted to the management apparatus 400 is transmitted in the form of being inserted in the uplink partial data packet, and the header of the uplink partial data packet (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, The request information (③, 0: transmission request, 1: interruption request), and response message reception number information (④) with respect to the operation confirmation message are inserted into the management device 400.

Further, the terminal device 100 receives a response message corresponding to the transmitted operation confirmation message.

More specifically, after transmitting the operation confirmation message corresponding to the uplink target network, that is, the WiFi network, to the management apparatus 400 via the second network device 300, the terminal device 100 transmits the operation confirmation message And receives a corresponding response message from the management apparatus 400. In this regard, the management apparatus 400 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network apparatus 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

Accordingly, the terminal device 100 determines the network status based on the reception status of the operation confirmation message.

More specifically, the terminal device 100 identifies the response message to the operation confirmation message through header analysis of the downlink partial data packet received from the management device 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management device 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the terminal device 100 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the terminal device 100 fails to receive a response message of the operation confirmation message at all for a predetermined time, the terminal device 100 determines that the uplink transmission performance of the WiFi network is poor, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages is small compared with the number of transmission acknowledgment messages, the terminal device 100 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) To allow the management apparatus 400 to recognize the transmission performance of the WiFi network and to change the predetermined data transmission rate for each access network.

The management apparatus 400 selects partial data segmented from transmission target data for each network according to a predetermined data transmission rate for each network.

More specifically, the management apparatus 400 confirms a predetermined data transmission rate for each network, that is, a first transmission rate and a second transmission rate for data transmission to the second network device 300 in accordance with the simultaneous transmission mode activation. Further, the management apparatus 400 selects the first partial data to be transmitted to the first network device 200 among the partial data divided from the transmission object data received from the external apparatus 500 based on the confirmed transmission ratio, And selects the second partial data to be transmitted to the second network device 300 among the remaining partial data. In this regard, the management apparatus 400 dynamically sets the data transfer rate between the networks dynamically based on various factors such as the characteristics of the access network, the current load state, and the type of the data to be transmitted, Partial data is transmitted for each network.

In addition, the management apparatus 400 transmits the selected partial data using the access network.

More specifically, the management device 400 transmits the selected partial data corresponding to the transmission network, that is, the first partial data to the first network device 200 located in the 3G network, to the first network device 200 Transmits the first partial data to the terminal device 100 as the receiving device and at the same time transmits the second partial data to the second network device 300 located in the WiFi network, 2 partial data to the terminal apparatus 100 as a receiving apparatus.

Furthermore, the management apparatus 400 receives an operation confirmation message from the terminal apparatus 100. [

More specifically, the management apparatus 400 refers to an uplink event occurrence of the terminal apparatus 100, for example, a response message (ACK) in response to partial data packet reception, and a retransmission request for a partial data packet not received in the middle When a request message (Duplicate ACK) and a session maintenance message (SYN / FIN) for session maintenance are requested, the message is received from the terminal device 100 through the WiFi network as an uplink target network. In addition, after receiving the uplink message, the management apparatus 400 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, to the second network device 300 And receives it from the terminal device 100. Here, in the case of an operation confirmation message received from the terminal apparatus 100, as shown in FIG. 4 (b), the operation confirmation message is transmitted in a form inserted in the uplink partial data packet, (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, Is transmitted from the terminal device 100 with the request information (3, 0: transmission request, 1: interruption request) and response message reception number information (4) for the operation confirmation message inserted.

Then, the management apparatus 400 delivers a response message corresponding to the received operation confirmation message.

More specifically, the management apparatus 400 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network device 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

Then, the management apparatus 400 recognizes the reception state of the response message of the terminal device 100 and determines the network state.

More specifically, the management apparatus 400 receives the reception status of the response message corresponding to the operation confirmation message from the terminal device 100 and recognizes the transmission performance of the WiFi network. Based on the reception performance, . In this regard, the terminal device 100 identifies the response message to the operation confirmation message through the header analysis of the downlink partial data packet received from the management device 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management device 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the terminal device 100 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the terminal device 100 fails to receive a response message of the operation confirmation message at all for a predetermined time, the terminal device 100 determines that the uplink transmission performance of the WiFi network is poor, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages is small compared with the number of transmission acknowledgment messages, the terminal device 100 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) .

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

That is, the terminal device 100 includes a communication unit 110 that receives partial data transmitted from the first network device 200 and the second network device 300, And a reception control unit 120 for determining a network state.

The communication unit 100 receives the partial data segmentarily transmitted from the first network device 200 and the second network device 300.

More specifically, the communication unit 110 receives the first partial data from the management device 400 through the first network device 200 and receives the second partial data through the second network device 300 . The reception control unit 120 generates the data by combining the first partial data and the second partial data based on the virtual network connection information included in the received first partial data and the second partial data, The transmission target data to be transmitted is restored. At this time, the reception control unit 120 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, The data to be transmitted can be restored by rearranging the data in the order of division based on the information and combining the normally re-arranged partial data.

At this time, the reception control unit 120 designates the uplink target network to transmit the network status related information based on partial data reception to the management apparatus 400. [

More specifically, the reception control unit 120 receives the first partial data from the management device 400 through the first network device 200, and receives the second partial data through the second network device 300 , An uplink path for transmitting network-related information based on the order information included in each partial data received, that is, a transmission network. For example, the management apparatus 400 transmits the partial data packet of the order information 1, the partial data packet of the order information 4 and 5, and the partial data packet of the order information 2 and 3 through the WiFi network, the order information 6 The communication unit 110 receives the partial data packet of the order information 1 and the partial data packet of the order information 4 and 5 through the first network device 200, 2 partial data packet of the order information 2 and the partial data packet of the order information 6 via the second network device 300. [ In this case, when a partial data packet of the order information 2 and 3 is received first through the second network device 300 rather than the partial data packet of the order information 1 received through the first network device 200, May designate the WiFi network as a transport network for transmitting network status related information to the management device 400 by determining that the uplink transmission performance of the WiFi network is better than the uplink transmission performance of the 3G network.

Accordingly, the communication unit 110 transmits an operation confirmation message to the management apparatus 400 through the designated uplink target network.

More specifically, the communication unit 110 generates an uplink event, for example, a response message (ACK) in response to partial data packet reception, in the middle of designating the WiFi network as an uplink target network through the above- (Duplicate ACK) indicating a retransmission request for a partial data packet that has not been received and a session maintenance message (SYN / FIN) for maintaining a session are requested, the corresponding message is transmitted to a WiFi network To the management apparatus 400 via the network. After receiving the uplink message, the reception control unit 120 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, to the second network device 300 To the management apparatus 400 via the network. In this case, as shown in FIG. 4 (b), the operation confirmation message transmitted to the management apparatus 400 is transmitted in the form of being inserted in the uplink partial data packet, and the header of the uplink partial data packet (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, The request information (③, 0: transmission request, 1: interruption request), and response message reception number information (④) with respect to the operation confirmation message are inserted into the management device 400.

Further, the communication unit 110 receives a response message corresponding to the transmitted operation confirmation message.

More specifically, after the communication unit 110 transmits the operation confirmation message corresponding to the uplink target network, that is, the WiFi network, to the management apparatus 400 via the second network device 300, the communication unit 110 responds to the transmitted operation confirmation message And receives a response message from the management apparatus 400. In this regard, the reception control unit 120 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network device 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

The reception control unit 120 determines the network status based on the reception status of the operation confirmation message.

More specifically, the reception control unit 120 identifies the response message to the operation confirmation message through the header analysis of the downlink partial data packet received from the management apparatus 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management apparatus 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the reception control unit 120 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the reception control unit 120 does not receive the response message of the operation confirmation message at all for a predetermined time, it determines that the uplink transmission performance of the WiFi network is not good, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages received is small compared with the number of transmission acknowledgment messages, the reception control unit 120 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) So that the management apparatus 400 recognizes the transmission performance of the WiFi network and can change a predetermined data transmission rate for each access network.

Hereinafter, a more specific configuration of the management apparatus 400 according to the embodiment of the present invention will be described with reference to FIG.

That is, the management apparatus 400 includes a communication unit 410 for transmitting the partial data segmentarily transmitted from the first network device 200 and the second network device 300, and an operation confirmation message transmitted from the terminal device 100 And a transmission control unit 420 for determining a network state based on a reception state of a corresponding response message.

The transmission control unit 420 selects partial data segmented from transmission target data for each network according to a predetermined data transmission rate for each network.

More specifically, the transmission control unit 420 confirms a predetermined data transmission rate for each network according to the simultaneous transmission mode activation, that is, the first transmission rate and the second transmission rate for data transmission to the second network device 300. Further, the transmission control unit 420 selects the first partial data to be transmitted to the first network device 200 among the partial data divided from the transmission target data received from the external device 500 based on the confirmed transmission ratio, And selects the second partial data to be transmitted to the second network device 300 among the remaining partial data. In this regard, the transmission control section 420 dynamically sets the data transmission rate between networks based on various factors such as the characteristics of the access network, the current load state, and the type of data to be transmitted, Partial data is transmitted for each network.

The communication unit 410 transmits the selected partial data using the corresponding access network.

More specifically, the communication unit 410 transmits the selected partial data corresponding to the transmission network, that is, the first partial data to the first network device 200 located in the 3G network, Transmits the first partial data to the terminal device 100 as the receiving device and at the same time transmits the second partial data to the second network device 300 located in the WiFi network so as to cause the second network device 300 to transmit the second partial data to the second And transfers the partial data to the terminal apparatus 100 as a receiving apparatus.

Further, the communication unit 410 receives an operation confirmation message from the terminal device 100. [

More specifically, the communication unit 410 receives an uplink event occurrence, for example, a response message (ACK) for partial data packet reception, a request for a retransmission request for a partial data packet not received in the middle, When transmission of a message (Duplicate ACK) and a session maintenance message (SYN / FIN) for session maintenance is required, the message is received from the terminal device 100 through the WiFi network which is an uplink target network. In addition, after receiving the uplink message, the communication unit 410 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, From the device 100. Here, in the case of an operation confirmation message received from the terminal apparatus 100, as shown in FIG. 4 (b), the operation confirmation message is transmitted in a form inserted in the uplink partial data packet, (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, Is transmitted from the terminal device 100 with the request information (3, 0: transmission request, 1: interruption request) and response message reception number information (4) for the operation confirmation message inserted.

The transmission control unit 420 transmits a response message corresponding to the received operation confirmation message.

More specifically, the transmission control unit 420 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network device 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To be transmitted to the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

Then, the transmission control unit 420 recognizes the reception state of the response message of the terminal device 100 and determines the network state.

More specifically, the transmission control unit 420 recognizes the transmission performance of the WiFi network based on the reception state of the response message corresponding to the operation confirmation message received from the terminal device 100 through the communication unit 410, Change the preset data transmission rate for each access network. In this regard, the terminal device 100 identifies the response message to the operation confirmation message through the header analysis of the downlink partial data packet received from the management device 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management device 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the terminal device 100 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the terminal device 100 fails to receive a response message of the operation confirmation message at all for a predetermined time, the terminal device 100 determines that the uplink transmission performance of the WiFi network is poor, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages is small compared with the number of transmission acknowledgment messages, the terminal device 100 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) .

As described above, according to the heterogeneous network-based data concurrent transmission system according to the present invention, in an environment for providing simultaneous transmission service for transmitting / receiving partial data obtained by dividing transmission target data using a plurality of heterogeneous networks, (Uplink) status of the access network based on the reception status of the operation confirmation message (Keep Alive) transmitted for checking the connection status of the specific access network designated as the target of the link, Accordingly, it is possible to stop the data transmission to the network or change the predetermined data transmission rate for each connection network. In other words, the uplink transmission performance of the WiFi network is determined through the operation confirmation message. When the quality of the WiFi network is not good, an unreliable WiFi network is not used and the packets are not received or retransmitted It is possible to prevent the simultaneous transmission performance from being deteriorated. Further, in consideration of the uplink packet, it is advantageous to cope with the changing network quality in real time more quickly in the network status judgment. In addition, it is possible to guarantee and improve the transmission performance of the concurrent transmission service by inducing the downlink transmission ratio to be determined based on the uplink transmission performance of the WiFi network.

Hereinafter, a method for simultaneously transmitting data based on heterogeneous networks according to an embodiment of the present invention will be described with reference to FIG. 5 to FIG. Here, the configurations shown in FIGS. 1 to 4 will be described with reference to corresponding reference numerals for convenience of explanation.

5, an operation method of a simultaneous network-based data concurrent transmission system according to an embodiment of the present invention will be described.

First, the management apparatus 400 selects partial data segmented from transmission target data for each network according to a predetermined data transmission rate for each network (S10).

Preferably, the management device 400 confirms a preset data transmission rate, i.e., a first transmission rate, and a second transmission rate for data transmission to the second network device 300, according to the simultaneous transmission mode activation. Further, the management apparatus 400 selects the first partial data to be transmitted to the first network device 200 among the partial data divided from the transmission object data received from the external apparatus 500 based on the confirmed transmission ratio, And selects the second partial data to be transmitted to the second network device 300 among the remaining partial data. In this regard, the management apparatus 400 dynamically sets the data transfer rate between the networks dynamically based on various factors such as the characteristics of the access network, the current load state, and the type of the data to be transmitted, Partial data is transmitted for each network.

Then, the management apparatus 400 transmits the selected partial data using the access network (S20).

Preferably, the management device 400 transmits the selected partial data corresponding to the transmission network, i.e., the first partial data to the first network device 200 located in the 3G network, to the first network device 200 Transmits the first partial data to the terminal device 100 as the receiving device and at the same time transmits the second partial data to the second network device 300 located in the WiFi network, 2 partial data to the terminal apparatus 100 as a receiving apparatus.

Then, the terminal device 100 designates the uplink target network to transmit the network status related information based on partial data reception to the management apparatus 400 (S30).

Preferably, the terminal device 100 receives the first partial data from the management device 400 via the first network device 200, receives the second partial data via the second network device 300 , An uplink path for transmitting network-related information based on the order information included in each partial data received, that is, a transmission network. For example, the management apparatus 400 transmits the partial data packet of the order information 1, the partial data packet of the order information 4 and 5, and the partial data packet of the order information 2 and 3 through the WiFi network, the order information 6 The terminal device 100 receives the partial data packet of the order information 1 and the partial data packet of the order information 4 and 5 through the first network device 200, A partial data packet of the order information 2, and a partial data packet of the order information 6 are received via the second network device 300. At this time, when partial data packets of the sequence information 2 and 3 are received first through the second network device 300 rather than the partial data packet of the sequence information 1 received through the first network device 200, May designate the WiFi network as a transport network for transmitting network status related information to the management device 400 by determining that the uplink transmission performance of the WiFi network is better than the uplink transmission performance of the 3G network.

Accordingly, the terminal device 100 transmits an operation confirmation message to the management device 400 via the designated uplink target network (S40).

Preferably, the terminal device 100 generates an uplink event, for example, a response message (ACK) in response to partial data packet reception, a middle (Duplicate ACK) indicating a retransmission request for a partial data packet that has not been received in the uplink target network, and a session maintenance message (SYN / FIN) for maintaining the session, And transmitted to the management apparatus 400 via the network. In addition, after transmitting the uplink message, the terminal device 100 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, to the second network device 300 To the management apparatus 400 via the network. In this case, as shown in FIG. 4 (b), the operation confirmation message transmitted to the management apparatus 400 is transmitted in the form of being inserted in the uplink partial data packet, and the header of the uplink partial data packet (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, The request information (③, 0: transmission request, 1: interruption request), and response message reception number information (④) with respect to the operation confirmation message are inserted into the management device 400.

Then, the management apparatus 400 delivers a response message corresponding to the received operation confirmation message (S50-S60).

Preferably, the management device 400 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network device 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

Accordingly, the terminal device 100 determines the network status based on the reception status of the operation confirmation message (S70-100).

Preferably, the terminal apparatus 100 identifies a response message to the operation confirmation message through header analysis of the downlink partial data packet received from the management apparatus 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management device 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the terminal device 100 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the terminal device 100 fails to receive a response message of the operation confirmation message at all for a predetermined time, the terminal device 100 determines that the uplink transmission performance of the WiFi network is poor, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages is small compared with the number of transmission acknowledgment messages, the terminal device 100 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) To allow the management apparatus 400 to recognize the transmission performance of the WiFi network and to change the predetermined data transmission rate for each access network.

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

First, the partial data transmitted from the first network device 200 and the second network device 300 is received (S110).

Preferably, the communication unit 110 receives the first partial data from the management device 400 through the first network device 200 and receives the second partial data through the second network device 300 . The reception control unit 120 generates the data by combining the first partial data and the second partial data based on the virtual network connection information included in the received first partial data and the second partial data, The transmission target data to be transmitted is restored. At this time, the reception control unit 120 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, The data to be transmitted can be restored by rearranging the data in the order of division based on the information and combining the normally re-arranged partial data.

At this time, the uplink target network is designated to transmit the network status related information based on partial data reception to the management apparatus 400 (S120).

Preferably, the reception control unit 120 receives the first partial data from the management apparatus 400 via the first network device 200 and receives the second partial data through the second network apparatus 300 , An uplink path for transmitting network-related information based on the order information included in each partial data received, that is, a transmission network. For example, the management apparatus 400 transmits the partial data packet of the order information 1, the partial data packet of the order information 4 and 5, and the partial data packet of the order information 2 and 3 through the WiFi network, the order information 6 The communication unit 110 receives the partial data packet of the order information 1 and the partial data packet of the order information 4 and 5 through the first network device 200, 2 partial data packet of the order information 2 and the partial data packet of the order information 6 via the second network device 300. [ In this case, when a partial data packet of the order information 2 and 3 is received first through the second network device 300 rather than the partial data packet of the order information 1 received through the first network device 200, May designate the WiFi network as a transport network for transmitting network status related information to the management device 400 by determining that the uplink transmission performance of the WiFi network is better than the uplink transmission performance of the 3G network.

Then, the operation confirmation message is transmitted to the management apparatus 400 through the designated uplink target network (S130-S140).

Preferably, the communication unit 110 generates an uplink event, for example, a response message (ACK) in response to partial data packet reception, in the middle of designating the WiFi network as an uplink target network through the above- (Duplicate ACK) indicating a retransmission request for a partial data packet that has not been received and a session maintenance message (SYN / FIN) for maintaining a session are requested, the corresponding message is transmitted to a WiFi network To the management apparatus 400 via the network. After receiving the uplink message, the reception control unit 120 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, to the second network device 300 To the management apparatus 400 via the network. In this case, as shown in FIG. 4 (b), the operation confirmation message transmitted to the management apparatus 400 is transmitted in the form of being inserted in the uplink partial data packet, and the header of the uplink partial data packet (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, The request information (③, 0: transmission request, 1: interruption request), and response message reception number information (④) with respect to the operation confirmation message are inserted into the management device 400.

In addition, a response message corresponding to the transmitted operation confirmation message is received (S150).

Preferably, the communication unit 110 transmits an operation confirmation message corresponding to the uplink target network, that is, the WiFi network, to the management apparatus 400 through the second network apparatus 300, And receives a response message from the management apparatus 400. In this regard, the reception control unit 120 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network device 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

Accordingly, the network status is determined based on the reception status of the operation confirmation message (S160 - S180).

Preferably, the reception control unit 120 identifies a response message to the operation confirmation message through header analysis of the downlink partial data packet received from the management apparatus 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management apparatus 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the reception control unit 120 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the reception control unit 120 does not receive the response message of the operation confirmation message at all for a predetermined time, it determines that the uplink transmission performance of the WiFi network is not good, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages received is small compared with the number of transmission acknowledgment messages, the reception control unit 120 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) So that the management apparatus 400 recognizes the transmission performance of the WiFi network and can change a predetermined data transmission rate for each access network.

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

First, in step S210, segmented partial data is selected from data to be transmitted on a network-by-network basis according to a predetermined data transmission rate for each network.

Preferably, the transmission control unit 420 confirms a predetermined data transmission rate for each network, that is, a first transmission rate and a second transmission rate for data transmission to the second network device 300 according to the simultaneous transmission mode activation. Further, the transmission control unit 420 selects the first partial data to be transmitted to the first network device 200 among the partial data divided from the transmission target data received from the external device 500 based on the confirmed transmission ratio, And selects the second partial data to be transmitted to the second network device 300 among the remaining partial data. In this regard, the transmission control section 420 dynamically sets the data transmission rate between networks based on various factors such as the characteristics of the access network, the current load state, and the type of data to be transmitted, Partial data is transmitted for each network.

Then, the selected partial data is transmitted using the access network (S220).

Preferably, the communication unit 410 transmits the selected partial data corresponding to the transmission network, that is, the first partial data, to the first network device 200 located in the 3G network so that the first network device 200 Transmits the first partial data to the terminal device 100 as the receiving device and at the same time transmits the second partial data to the second network device 300 located in the WiFi network so as to cause the second network device 300 to transmit the second partial data to the second And transfers the partial data to the terminal apparatus 100 as a receiving apparatus.

Further, an operation confirmation message is received from the terminal device 100 (S230).

Preferably, the communication unit 410 receives an uplink event occurrence, for example, a response message (ACK) for partial data packet reception, a request for a retransmission request for a partial data packet not received in the middle, When transmission of a message (Duplicate ACK) and a session maintenance message (SYN / FIN) for session maintenance is required, the message is received from the terminal device 100 through the WiFi network which is an uplink target network. In addition, after receiving the uplink message, the communication unit 410 transmits an operation confirmation message (Keep Alive) for confirming the connection status with the WiFi network, which is the uplink target network, From the device 100. Here, in the case of an operation confirmation message received from the terminal apparatus 100, as shown in FIG. 4 (b), the operation confirmation message is transmitted in a form inserted in the uplink partial data packet, (1), 0 (normal uplink packet, 1: operation confirmation message) for confirming whether or not an operation confirmation message is received, sequence information (1, operation confirmation message number) for recording the transmission sequence of the uplink packet, Is transmitted from the terminal device 100 with the request information (3, 0: transmission request, 1: interruption request) and response message reception number information (4) for the operation confirmation message inserted.

At this time, the response message corresponding to the received operation confirmation message is transmitted (S240 - S250).

Preferably, the transmission control unit 420 identifies the operation confirmation message through header analysis of the uplink partial data packet received through the second network device 300, and transmits a response message corresponding to the identified operation confirmation message to the 3G To be transmitted to the terminal device 100 via the network or the WiFi network. At this time, in the case of the response message transmitted to the terminal device 100, as shown in FIG. 4 (a), the response message is transmitted in a form inserted in the downlink partial data packet. (1, 0: normal downlink packet, 1: response message) for confirming whether or not a response message corresponding to the operation confirmation message is inserted, and order information (1, response message number) And transmitted to the terminal device 100 in a state of being connected.

Thereafter, the terminal 100 recognizes the reception status of the response message and determines the network status (S260-S270).

Preferably, the transmission control unit 420 recognizes the transmission performance of the WiFi network based on the reception state of the response message corresponding to the operation confirmation message received from the terminal device 100 through the communication unit 410, Change the preset data transmission rate for each access network. In this regard, the terminal device 100 identifies the response message to the operation confirmation message through the header analysis of the downlink partial data packet received from the management device 400, and transmits the response message to the WiFi Thereby determining the uplink transmission performance of the network. At this time, when the response message is continuously received from the management device 400 in response to the number of transmission of the operation confirmation message corresponding to the WiFi network, the terminal device 100 determines that the uplink transmission performance of the WiFi network is good . On the other hand, if the terminal device 100 fails to receive a response message of the operation confirmation message at all for a predetermined time, the terminal device 100 determines that the uplink transmission performance of the WiFi network is poor, suspends the use of the WiFi network, (400). Also, even when the number of acknowledgment messages is small compared with the number of transmission acknowledgment messages, the terminal device 100 inserts the corresponding reception state into the uplink partial data packet as shown in FIG. 4 (b) .

As described above, according to the simultaneous network-based data transmission method according to the present invention, in an environment for providing simultaneous transmission service for transmitting / receiving partial data obtained by dividing transmission target data using a plurality of heterogeneous networks, (Uplink) status of the access network based on the reception status of the operation confirmation message (Keep Alive) transmitted for checking the connection status of the specific access network designated as the target of the link, Accordingly, it is possible to stop the data transmission to the network or change the predetermined data transmission rate for each connection network. In other words, the uplink transmission performance of the WiFi network is determined through the operation confirmation message. When the quality of the WiFi network is not good, an unreliable WiFi network is not used and the packets are not received or retransmitted It is possible to prevent the simultaneous transmission performance from being deteriorated. Further, in consideration of the uplink packet, it is advantageous to cope with the changing network quality in real time more quickly in the network status judgment. In addition, it is possible to guarantee and improve the transmission performance of the concurrent transmission service by inducing the downlink transmission ratio to be determined based on the uplink transmission performance of the WiFi network.

Meanwhile, the simultaneous network-based data concurrent transfer method according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

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.

In accordance with the present invention, there is provided a simultaneous transmission method for simultaneously transmitting and receiving partial data obtained by dividing data to be transmitted using a plurality of heterogeneous networks, (Uplink) The uplink status of the access network is checked based on the reception status of an operation confirmation message (Keep Alive) transmitted to check the connection status of a specific access network designated as a target, It is not only the use of the related technology but also the possibility of commercialization or operation of the applied device is sufficient and it is practically possible to carry out clearly, It is a possible invention.

100: terminal device
110: communication unit 120: reception control unit
200: first network device
300: second network device
400: management device
410: communication unit 420: transmission control unit
500: External device

Claims (1)

A communication unit for transmitting the partial data segmented from the transmission object data to the reception apparatus through two or more access networks; And
When the reception of the operation confirmation message for confirming the network status of the specific access network transmitted from the receiving apparatus through the specific access network among the two or more access networks is confirmed, a response message corresponding to the received operation confirmation message And transmits the operation confirmation message and the response message to the receiving apparatus after confirming the network status of the specific access network determined based on at least one of the transmission status of the operation confirmation message and the reception status of the response message in the reception apparatus, Wherein the specific access network is not used or is continuously used.

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