KR20130091173A - Apparatus for simultaneously transmitting data in heterogeneous network - Google Patents

Abstract

According to the present invention, in the environment of providing a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data by using a plurality of heterogeneous networks, the receiving side apparatus is reliable while minimizing unnecessary information exchange between the transmitting side apparatus and the receiving side apparatus. By quickly and accurately determining the state of the network based on high information, that is, based on the partial data transmission time interval and the partial data reception time interval for each network, and dynamically adjusting the data transmission rate for each network of the transmitting device based on this, Disclosed are a heterogeneous network-based simultaneous data transmission / reception apparatus and a transmission / reception method including a configuration for improving data transmission performance in a simultaneous transmission service environment by reflecting an optimal data transmission rate for each network, and a heterogeneous network-based data simultaneous transmission apparatus and a method are disclosed. It is.

Description

[0001] APPARATUS FOR SIMULTANEOUSLY TRANSMITTING DATA IN HETEROGENEOUS NETWORK [0002]

The present invention relates to a data simultaneous transmission service scheme, and more particularly, in a network providing a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks, each network at a receiving device. Unnecessary information exchange between the sending device and the receiving device by judging the state of the network based on the partial data transmission time interval and the partial data receiving time interval, and dynamically adjusting the data transmission rate for each network of the sending device accordingly. The present invention relates to a heterogeneous network-based simultaneous data transmission / reception apparatus and a transmission / reception method capable of reflecting an optimal data transmission rate for each network based on the status of each network that is determined quickly and accurately.

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, data rates are getting cheaper, and various large data services are increasing at the same time, as network load rate of operators is rapidly increasing, network investment is excessively expended and service stability. The situation is being threatened.

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.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a receiving side in an environment in which a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks is provided. The device determines the network state based on the partial data transmission time interval and the partial data reception time interval for each network, and dynamically adjusts the data transmission rate for each network of the transmitting device based on the transmission data and the receiving device. It is to reflect the optimal data transmission rate for each network based on the status of each network which is judged quickly and accurately while minimizing unnecessary information exchange between them.

The heterogeneous network-based simultaneous transmission / reception apparatus according to the first aspect of the present invention for achieving the above object receives, through two or more access networks, partial data divided from data to be transmitted based on a preset data transmission rate for each access network. A communication unit; A partial data extracting unit for extracting two or more pieces of partial data of which transmission time information is recognized from the pieces of partial data received through a specific access network of the two or more access networks; A transmission time checking unit for checking a data transmission time interval between the two or more pieces of partial data based on each transmission time information recognized by each of the extracted two or more pieces of data; A reception time measurement unit for measuring a data reception time interval between the extracted two or more partial data; And a controller configured to obtain network state information of the specific access network based on the identified data transmission time interval and the measured data reception time interval.

Preferably, the control unit is configured to adjust the data transmission rate for each of the access networks preset to the transmitting device for transmitting the partial data divided from the transmission target data based on the obtained network state information of the specific access network. Can be.

Preferably, the two or more partial data may include partial data including the transmission time information and neighboring each other.

Preferably, the controller is based on the data transmission time interval and the measured data reception time interval that are identified corresponding to each of the two or more partial data sets included in the two or more partial data and composed of neighboring partial data. Calculating a transmission delay difference value corresponding to each of the at least two partial data sets, and based on a difference value between neighboring transmission delay difference values among the transmission delay difference values calculated corresponding to each of the at least two partial data sets, The network state information for the specific access network may be obtained.

Preferably, the control unit includes, among the two or more partial data sets included in the two or more partial data and configured to be adjacent to each other, a first condition and confirmation that the identified data transmission time interval belongs to a specific exclusion time interval. The specific partial data set that satisfies at least one of the second conditions larger than the measured data transmission time interval may be excluded from being used for acquiring network state information for the specific access network. have.

In the heterogeneous network-based simultaneous transmission device according to the second aspect of the present invention for achieving the above object, partial data selection for selecting the partial data divided from the transmission target data for each access network based on a preset data transmission rate for each access network. part; An information insertion unit for inserting transmission time information into two or more pieces of partial data selected from the partial data corresponding to the specific access network; A communication unit which transmits the selected partial data for each access network through each access network; And the specific information obtained based on a data transmission time interval and a measured data reception time interval that are identified at a receiving apparatus corresponding to the two or more partial data according to whether the transmission time information inserted into the specific two or more partial data transmitted. And a controller configured to adjust the data transmission rate for each preset access network according to the network state information of the access network.

In the heterogeneous network-based simultaneous transmission and reception method according to the third aspect of the present invention for achieving the above object, the partial data divided from the transmission target data is received through two or more access networks based on a data transmission rate for each access network. Receiving partial data; A partial data extraction step of extracting two or more pieces of partial data of which transmission time information is recognized from the pieces of partial data received through a specific access network of the two or more access networks; A transmission time checking step of checking a data transmission time interval between the two or more pieces of partial data based on each transmission time information recognized by each of the extracted two or more pieces of data; A reception time measurement step of measuring a data reception time interval between the extracted two or more partial data; And obtaining network status information for the specific access network based on the identified data transmission time interval and the measured data reception time interval.

Preferably, the method further includes adjusting the data transmission rate for each of the access networks preset to the transmitting device that transmits the partial data divided from the transmission target data based on the obtained network state information of the specific access network. can do.

Preferably, the two or more partial data may include partial data including the transmission time information and neighboring each other.

Preferably, the acquiring the network state information includes: receiving the measured data transmission time interval and measured data corresponding to each of the two or more partial data sets included in the two or more partial data and composed of neighboring partial data. Calculating a transmission delay difference value corresponding to each of the at least two partial data sets based on a time interval, and between neighboring transmission delay difference values among the transmission delay difference values calculated corresponding to each of the at least two partial data sets. The method may include obtaining network state information on the specific access network based on the difference value.

Preferably, the acquiring the network state information may include: generating at least two partial data sets included in the at least two partial data and configured as neighboring partial data, wherein the identified data transmission time intervals belong to a specific exclusion time interval. The specific partial data set that satisfies at least one of the first condition and the second condition larger than the measured data reception time interval is not used for acquiring network state information for the specific access network. Can be excluded.

In the heterogeneous network-based simultaneous transmission method according to the fourth aspect of the present invention for achieving the above object, partial data selection for selecting partial data divided in transmission target data for each access network based on a preset data transmission rate for each access network step; An information insertion step of inserting transmission time information into two or more pieces of partial data selected from the partial data corresponding to the specific access network; A partial data transmission step of transmitting the selected partial data for each access network through each access network; And the specific information obtained based on a data transmission time interval and a measured data reception time interval that are identified at a receiving apparatus corresponding to the two or more partial data according to whether the transmission time information inserted into the specific two or more partial data transmitted. And a transmission rate adjusting step of adjusting a data transmission rate for each preset access network according to network state information on the access network.

Therefore, according to the heterogeneous network-based simultaneous data transmission and reception method and transmission method and the heterogeneous network-based data simultaneous transmission and transmission method of the present invention, the simultaneous transmission and reception of partial data divided data using a plurality of heterogeneous networks In an environment in which a transmission service is provided, the receiving device is based on reliable information, i.e., based on the partial data transmission time interval and the partial data reception time interval for each network, while minimizing unnecessary information exchange between the transmitting device and the receiving device. By determining the network status quickly and accurately, and dynamically adjusting the data transmission rate for each network of the sending device based on this, the data transmission performance can be improved in the simultaneous transmission service environment by reflecting the optimal data transmission rate for each network. have.

1 is a block diagram illustrating a heterogeneous network-based data concurrent transmission system according to a preferred embodiment of the present invention.
2 is a block diagram showing the configuration of a heterogeneous network-based data transmission apparatus according to a preferred embodiment of the present invention.
3 is a block diagram illustrating a configuration of a heterogeneous network-based simultaneous data transmission / reception apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating an operation flow of a heterogeneous network-based data transmission system according to a preferred embodiment of the present invention.
5 is a flowchart illustrating a flow of a heterogeneous network-based data transmission method according to a preferred embodiment of the present invention.
6 is a flowchart illustrating the flow of a heterogeneous network-based data transmission and reception method according to a preferred embodiment of the present invention.

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

FIG. 1 illustrates a heterogeneous network-based data concurrent transmission system according to a preferred embodiment of the present invention.

As shown in FIG. 1, the heterogeneous network-based data concurrent transmission system according to the present invention includes a management apparatus 400 for supporting a simultaneous transmission service for dividing data to be transmitted into two or more partial data and transmitting the data over two or more networks, And at least one terminal apparatus 100 connected to the management apparatus 400 and using the simultaneous transmission service.

Here, two or more networks, that is, heterogeneous networks, may include WCDMA, CDMA, WiBro, WLAN (WiFi), Long Term Evolution (LTE), and the like.

In the present invention, for convenience of explanation, a first network (hereinafter referred to as a "3G network"), which refers to a wireless packet service network (WCDMA) among two or more networks, and a second network 2 network (hereinafter referred to as "WiFi network"). Accordingly, the first network device 200 refers to a gateway GPRS support node (GGSN) device for operating a 3G network, that is, a wireless packet service network, and the second network device 300 is a WiFi network, It refers to an access point (AP) for operating a local area wireless network.

Furthermore, the heterogeneous network-based simultaneous data transmission system according to the present invention includes an external device 500 for receiving data combined / restored according to a simultaneous transmission service from the management device 400 and a policy management device for providing a network selection policy. (Not shown).

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 is connected to the terminal device 100 through data transmission / For example, various services such as a portal service and a content providing service can be provided.

Accordingly, the heterogeneous network-based data concurrent transfer service according to the present invention divides one piece of data between the terminal device 100 and the management device 400 for data transmission / reception between the terminal device 100 and the external device 500 And implements a simultaneous transmission service in which divided partial data is transmitted using a plurality of heterogeneous networks (e.g., 3G and WiFi), and the received partial data is combined to restore the original data.

At this time, the terminal device 100 and the management device 400 may be devices on the transmission side according to the uplink process and the downlink process, depending on the subject of data transmission using the service flow, that is, the data transmission service And may be a device on the receiving side. In the present embodiment, for the sake of convenience of description, a management apparatus 400 as a transmitting apparatus that is located in a heterogeneous network environment and provides a data concurrent transmission service to the terminal apparatus 100 is described on the basis of a downlink process, And a terminal device 100 as a receiving device for performing data transmission / reception with the terminal device 400 will be described.

As described above, the simultaneous transmission service provided by the present invention simultaneously transmits partial data divided from one data using a plurality of heterogeneous networks (eg, 3G and WiFi), and thus uses heterogeneous networks (eg, 3G and WiFi). It is important to determine the data transmission rate optimally based on the transmission rate of partial data to each network depending on the state of the network (eg congestion).

Accordingly, in the present invention, in the environment for providing simultaneous transmission service, the partial data transmission time interval and the partial data transmission time intervals and portions of the receiving device are based on reliable information while minimizing unnecessary information exchange between the transmitting device and the receiving device. Quickly and accurately determine the network status based on the data reception time interval, and dynamically adjust the data transmission rate for each network of the sending device based on the data reception time interval, thereby reflecting the optimal data transmission rate for each network in the simultaneous transmission service environment. We propose a configuration that improves data transmission performance.

For convenience of description, referring to the downlink, the management device 400 as a transmitting device, that is, a heterogeneous network-based simultaneous transmission device, has a preset data transmission rate for two or more access networks (eg, 3G: WiFi = 2: Based on 5), partial data divided from the data to be transmitted is selected for each of the two or more access networks.

In other words, when the management device 400 receives the transmission target data to be transmitted from the external device 500 to the terminal device 100, the management device 400 divides the data into partial data and transmits data for each access network (eg, 3G and WiFi). In other words, the first transmission rate for data transmission to the first network device 200 and the second transmission rate for data transmission to the second network device 300 are checked, and the transmission target data is determined based on the confirmed transmission rate. The first partial data to be transmitted to the first network apparatus 200 is selected among the divided partial data, and the second partial data to be transmitted to the second network apparatus 300 is selected among the remaining partial data.

Then, the management device 400 will transmit each piece of selected data for each of the two or more access networks through the corresponding access network.

In this case, the management apparatus 400 may insert the transmission time information into two or more pieces of partial data selected from the partial data corresponding to the specific access network. Here, the specific access network may correspond to any one of two or more access networks (eg, 3G and WiFi), and may correspond to each of two or more access networks (eg, 3G and WiFi).

That is, the management device 400 may insert transmission time information into at least two partial data of the first partial data selected corresponding to the first network (eg, 3G) among two or more access networks (eg, 3G and WiFi). Can be. For example, the management device 400 selects two neighboring partial data packets among the first partial data selected corresponding to the first network (eg, 3G), and applies the corresponding partial data to each of the selected two partial data packets. Transmission time information corresponding to a time at which a packet is selected to be transmitted / transmitted through a first network (eg, 3G) may be inserted.

Meanwhile, the management device 400 may insert transmission time information into at least two partial data of the second partial data selected corresponding to the second network (eg, WiFi) among two or more access networks (eg, 3G and WiFi). Can be. For example, the management apparatus 400 selects two neighboring partial data packets among the second partial data selected corresponding to the second network (eg, WiFi), and corresponding partial data to each of the selected two partial data packets. Transmission time information corresponding to a time at which a packet is selected to be transmitted / transmitted through a second network (eg, WiFi) may be inserted.

1, the management device 400 selects partial data packets 1 and 2 to be transmitted through the 3G network and selects partial data packets 3 and 4 to be transmitted through the WiFi network. Suppose that you choose to send over 3G network, you want to send partial data packet 6,7 through WiFi network, and you have chosen to send partial data 8,9 through 3G network.

At this time, the management device 400 is adjacent to two partial data packets 1 and 2 having neighboring order information among the first partial data selected corresponding to the 3G network, that is, the partial data packets 1,2,5,8,9. Two partial data packets 8 and 9 having sequence information can be selected. In addition, the management apparatus 400 may insert transmission time information corresponding to the time at which the corresponding partial data packet is selected to be transmitted / transmitted through the 3G network to each of the partial data packets 1, 2, 8, and 9. Here, the partial data packets 1 and 2 correspond to one partial data set corresponding to the 3G network, and the partial data packets 8 and 9 correspond to one partial data set corresponding to the 3G network.

Of course, the management device 400, the second partial data selected in correspondence with the WiFi network, that is, the partial information packets 3, 4, 6, and 7 of the neighboring order information having neighboring order information among the neighboring order information Two partial data packets 6 and 7 may be selected. In addition, the management apparatus 400 may insert transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through the WiFi network, to the partial data packets 3, 4, 6, and 7, respectively. Here, the partial data packets 3 and 4 correspond to one partial data set corresponding to the WiFi network, and the partial data packets 6 and 7 correspond to one partial data set corresponding to the WiFi network.

The management apparatus 400 transmits the partial data selected for each of the two or more access networks, that is, the partial data including the partial data into which the transmission time information is inserted as described above through the corresponding access network.

That is, the management device 400 transmits each partial data selected for each access network (eg, 3G and WiFi) to each access network (eg, 3G and WiFi), and thus the first network device 200 manages the management device 400. In this case, the first partial data transmitted from the control unit 100 is transmitted to the terminal apparatus 100, and the second network apparatus 300 transmits the second partial data transmitted from the management apparatus 400 to the terminal apparatus 100.

Accordingly, the terminal apparatus 100 as a receiving side apparatus of the present invention, that is, a heterogeneous network-based simultaneous transmission and reception apparatus, receives partial data through two or more access networks, and rearranges them according to the division order based on the sequence information of the received partial data. The data to be transmitted can be restored by combining the partial data which are normally rearranged.

In this case, the terminal apparatus 100 extracts two or more pieces of partial data for which transmission time information is recognized from the partial data transmitted through a specific access network among two or more access networks.

That is, the terminal device 100 may extract two or more pieces of partial data in which the inserted transmission time information is recognized from the partial data transmitted through each of two or more access networks (eg, 3G and WiFi). According to the example described with reference to FIG. 1 as described above, the terminal device 100 may extract two partial data packets 1 and 2 and two partial data packets 8 and 9 corresponding to the 3G network, and WiFi. Two partial data packets 3 and 4 and two partial data packets 6 and 7 may be extracted corresponding to the network.

The terminal device 100 checks the data transmission time interval between the two or more pieces of partial data based on the respective transmission time information recognized in each of the extracted two or more pieces of pieces of data.

That is, the terminal apparatus 100 corresponds to each of the partial data sets composed of two partial data packets 1 and 2 extracted corresponding to the 3G network, and the partial data sets composed of two partial data packets 8 and 9, respectively. Data transmission time interval (x_i) between the partial data packet 1 and the partial data packet 2 can be confirmed through the transmission time information inserted into each partial data packet in each partial data set, and the data between the partial data packet 8 and the partial data packet 9 can be confirmed. The transmission time interval (x_i) can be checked.

Then, the terminal device 100 measures the data reception time interval between the extracted two or more pieces of partial data.

That is, the terminal apparatus 100 corresponds to each of the partial data sets composed of two partial data packets 1 and 2 extracted corresponding to the 3G network, and the partial data sets composed of two partial data packets 8 and 9, respectively. It is possible to obtain the data reception time interval y_i between the partial data packet 1 and the partial data packet 2 by measuring the difference in the reception time at which each partial data packet in each partial data set is received, and between the partial data packet 8 and the partial data packet 9. The data reception time interval y_i can be checked.

The terminal device 100 obtains network state information on a specific access network based on the identified data transmission time interval and the measured data reception time interval corresponding to each partial data set.

That is, the terminal apparatus 100 may determine the corresponding 3G network based on the data transmission time interval x_i and the measured data reception time interval y_i, which are identified as described above, for each partial data set corresponding to the 3G network. By determining the network state for the network state information corresponding to it can be obtained.

In more detail, the terminal apparatus 100 may perform partial data on the basis of the data transmission time interval x_i and the measured data reception time interval y_i identified as described above for each partial data set corresponding to the 3G network. The transmission delay difference value gap_i corresponding to each of the sets may be calculated.

Preferably, the transmission delay difference value gap_i may be calculated by Equation 1 below.

Equation 1.

gap_i = 1-[(y_i)-(x_i)] / (x_i)

Accordingly, the terminal apparatus 100 determines a transmission delay difference value gap_i for each partial data set (eg, two partial data packets 1, 2 and 2 partial data packets 8, 9, etc.) corresponding to the 3G network. Can be calculated

In addition, the terminal apparatus 100 may select a neighboring transmission delay value gap_i calculated corresponding to each partial data set (for example, two partial data packets 1, 2 and 2 partial data packets 8, 9, etc.). Based on the difference value delta_i between the transmission delay differences, network state information about a specific access network, that is, a 3G network, may be obtained.

Preferably, network state information may be obtained through Equations 2 and 3 below.

Equation 2.

delta_i = gap_i-gap_ (i-1)

Equation 3.

Sum_N = Σ delta_i

Thus, for example, the terminal apparatus 100 corresponds to each partial data set (for example, two partial data packets 1, 2 and two partial data packets 8, 9, etc.) through Equation 1 described above corresponding to the 3G network. Correspondingly, after calculating the transmission delay difference value gap_i, as shown in Equation 2, the transmission delay difference value gap_i for two partial data packets 8 and 9 and two immediately preceding neighbors are transmitted between neighboring transmission delay values. The difference value delta_i between the transmission delay difference values gap_ (i-1) for the partial data packets 1 and 2 may be calculated.

The terminal device 100 may calculate Sum_N for the 3G network through Equation 3 by adding the N difference values delta_i calculated as described above.

Accordingly, the terminal device 100 may obtain network state information indicating the degree of congestion for the 3G network using Sum_N calculated for the 3G network.

That is, if Sum_N has a negative value, it may be determined that the transmission delay difference value gap_i is decreasing, and thus, it may be determined that the access network having the negative Sum_N is congested. As the negative absolute value is larger, the degree of congestion is determined to be greater, so that network state information corresponding to the negative absolute value is obtained.

Of course, the terminal device 100 may obtain network state information on the WiFi network through a process in which Equation 1, Equation 2, and Equation 3 are also reflected in response to the WiFi network.

Thus, for example, when the Sum_N of the 3G network that is repeatedly extracted and calculated in an arbitrary period has a positive number and the Sum_N of the WiFi network has a negative number, the terminal device 100 does not cause congestion for the 3G network having a positive number. Network status information to determine that it is not, and to increase the transmission rate to the 3G network, and to determine that congestion has occurred for a negative WiFi network, and generate network state information to reduce the transmission rate to the WiFi network. Will be obtained.

Here, the terminal apparatus 100 has an adjustment policy for adjusting the data transmission rate for each access network based on the calculated network state information for each access network generated / acquired based on the calculated Sum_N for each access network. And / or held in management device 400.

Accordingly, the terminal device 100, based on the network state information of each of the specific access network, i.e., the 3G network and the WiFi network, obtained as described above, the transmitting device that transmits the partial data divided from the transmission target data, that is, the management device ( In step 400, the data transmission rate for each access network is adjusted.

For example, the terminal device 100 may provide the network state information of each of the 3G network and the WiFi network to the management device 400 so that the management device 400 may use the data transmission rate for each access network.

Thus, the management device 400, based on the network status information of each of the 3G network and the WiFi network provided from the terminal device 100 preset data transmission rate for each access network (for example, 3G: WiFi = 2: 5) You can adjust the data transmission rate by access network (eg 3G: WiFi = 4: 3) according to the adjustment policy.

Alternatively, the terminal device 100 determines a data transmission rate (eg, 3G: WiFi = 4: 3) for each access network according to the adjustment policy based on the network state information of each of the 3G network and the WiFi network, and determines the determined access network. The management apparatus 400 may request to adjust the data transmission rate for each access network by the data transmission rate for each connection.

Thus, the management device 400, the data transmission rate for each access network (eg, 3G: WiFi = 4: 3) that is requested to adjust from the terminal device 100, the data transmission rate for each access network (for example, 3G: WiFi) = 2: 5).

On the other hand, in the foregoing description, the case where the management apparatus 400 transmits partial data obtained by dividing the transmission object data to the terminal apparatus 100 on the basis of the downlink is described.

In addition, in the simultaneous transmission service to which the present invention is applied, the terminal apparatus 100 transmits the partial data obtained by dividing the transmission target data to the management apparatus 400 during the uplink, and the management apparatus 400 rearranges the partial data. In this case, the management apparatus 400 as the receiving apparatus during the uplink performs the above-described network state information acquisition and data transmission rate adjustment inducing operation for each access network performed by the terminal apparatus 100 as the receiving apparatus during the downlink, The terminal apparatus 100 as the transmitting apparatus during the uplink may perform the above-described insertion of the transmission time information and the adjustment of the data transmission rate for each access network performed by the management apparatus 400 as the transmitting apparatus during the downlink.

Hereinafter, a configuration of a heterogeneous network-based data simultaneous transmission device, that is, a transmission side device, according to the present invention will be described in more detail with reference to FIG. 2. For convenience of description, reference numbers of the management apparatus 400 are referred to based on the downlink and reference is made to the reception apparatus 100 using the reference numbers of the terminal apparatus 100.

The heterogeneous network-based data simultaneous transmission device, that is, the transmitting device 400 according to the preferred embodiment of the present invention, selects the partial data divided from the transmission target data for each access network based on a preset data transmission rate for each access network. The data selection unit 420, the information insertion unit 430 for inserting transmission time information into two or more pieces of partial data selected corresponding to a specific connection network, and the partial data selected for each connection network through each connection network. The data transmission time interval and the measured data which are confirmed by the receiving apparatus 100 in response to the two or more pieces of partial data according to the communication unit 440 to transmit and the transmission time information inserted into the two or more pieces of specific data that have been transmitted. Network status information for the specific access network obtained based on the reception time interval The control unit 450 adjusts the data transmission rate for each preset access network.

The partial data selector 420 selects the partial data divided from the transmission target data for each access network based on a preset data transmission rate (eg, 3G: WiFi = 2: 5) for each of the access networks.

That is, the partial data selection unit 420 divides the transmission target data to be transmitted to the reception apparatus 100 into partial data and divides the data into the partial data, and the data transmission rate of each access network (eg, 3G and WiFi), that is, the first network. The first transmission rate for data transmission to the device 200 and the second transmission rate for data transmission to the second network device 300 are checked, and among the partial data divided from the transmission target data based on the confirmed transmission rate. The first partial data to be transmitted to the first network device 200 is selected, and the second partial data to be transmitted to the second network device 300 is selected among the remaining partial data.

The information insertion unit 430 inserts transmission time information into two or more pieces of partial data selected from the partial data corresponding to the specific access network. Here, the specific access network may correspond to any one of two or more access networks (eg, 3G and WiFi), and may correspond to each of two or more access networks (eg, 3G and WiFi).

That is, the information insertion unit 430 inserts transmission time information into at least two partial data of the first partial data selected corresponding to the first network (eg, 3G) among two or more access networks (eg, 3G and WiFi). can do. For example, the information insertion unit 430 selects two neighboring partial data packets among the first partial data selected corresponding to the first network (eg, 3G), and corresponds to each of the selected two partial data packets. Transmission time information corresponding to the time at which the data packet is selected to be transmitted / transmitted through the first network (eg, 3G) may be inserted.

Meanwhile, the information insertion unit 430 inserts transmission time information into at least two partial data of the second partial data selected corresponding to the second network (eg, WiFi) among two or more access networks (eg, 3G and WiFi). can do. For example, the information insertion unit 430 selects two neighboring partial data packets among the second partial data selected corresponding to the second network (eg, WiFi), and corresponds to each of the selected two partial data packets. Transmission time information corresponding to a time at which a data packet is selected to be transmitted / transmitted through a second network (eg, WiFi) may be inserted.

1, in the partial data selection unit 420, the partial data packets 1 and 2 are selected to be transmitted through the 3G network, and the partial data packets 3 and 4 are selected to be transmitted through the WiFi network. It is assumed that the data 5 is selected to be transmitted through the 3G network, the partial data packets 6 and 7 are selected to be transmitted through the WiFi network, and the partial data 8 and 9 are selected to be transmitted through the 3G network.

At this time, the information insertion unit 430, neighboring the first partial data selected corresponding to the 3G network, that is, the two partial data packets 1, 2 having neighboring order information among the partial data packets 1,2, 5, 8, and 9 Two partial data packets 8 and 9 having order information can be selected. In addition, the information insertion unit 430 may insert transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through the 3G network in each of the partial data packets 1, 2, 8, and 9. .

Of course, the information insertion unit 430, the neighboring order of the two partial data packets 3, 4 having the neighboring order information among the second partial data, that is, the partial data packets 3, 4, 6, 7 selected corresponding to the WiFi network. Two partial data packets 6, 7 with information can be selected. In addition, the information insertion unit 430 may insert transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through the WiFi network to each of the partial data packets 3, 4, 6, and 7. .

The communication unit 440 refers to a communication module for interworking with the first network device 200 using a 3G network and interworking with the second network device 300 using a WiFi network.

The communication unit 440 transmits each partial data selected for each of the two or more access networks, that is, the partial data including the partial data into which the transmission time information is inserted as described above through the corresponding access network.

That is, the communication unit 440 transmits the plurality of first partial data selected for the 3G network to the first network device 200 located in the 3G network, and transmits the plurality of second partial data selected for the WiFi network. By transmitting to the second network head 300 located in the WiFi network, the first network device 200 transmits the first partial data to the receiving device 100, the second network device 300 is the second partial data To be transmitted to the receiving apparatus 100.

The controller 450 may determine a data transmission time interval that is confirmed by the reception apparatus 100 in response to the two or more pieces of partial data according to whether the transmission time information inserted into the two or more pieces of partial data transmitted by the communication unit 440 is used. According to the network state information of the specific access network obtained based on the measured data reception time interval, the preset data transmission rate for each access network used by the partial data selector 420 may be adjusted.

That is, as described above, the reception apparatus 100 may provide network status information of each of the 3G network and the WiFi network to the transmitting apparatus 400 so that the transmitting apparatus 400 may use the data transmission rate for each access network. have.

In this case, the control unit 450, based on the network status information of each of the 3G network and the WiFi network provided from the receiving device 100, the data transmission rate for each connection network (for example, 3G: WiFi = 2: 5) You can adjust the data transmission rate by access network (eg 3G: WiFi = 4: 3) according to the adjustment policy.

Alternatively, the reception apparatus 100 determines a data transmission rate for each access network (eg, 3G: WiFi = 4: 3) based on the network state information of each of the 3G network and the WiFi network, and determines the access network. As a specific data transmission rate, the transmitting side device 400 may request to adjust a preset data transmission rate for each access network.

In this case, the controller 450 may set the data transmission rate for each access network (eg, 3G: WiFi = 4: 3) that is requested to be adjusted by the receiver 100 (eg, 3G: WiFi). = 2: 5).

Hereinafter, a configuration of a heterogeneous network-based simultaneous data transmission / reception apparatus, that is, a receiver side apparatus according to the present invention will be described in detail with reference to FIG. 3. The reference number of the terminal apparatus 100 is referred to on the basis of the downlink for the convenience of description and the reference number of the management apparatus 400 is used to refer to the transmission apparatus 400. [

The heterogeneous network-based data simultaneous transmission / reception apparatus according to the preferred embodiment of the present invention, i.e., the receiving side apparatus 100, may divide partial data divided from the data to be transmitted based on a preset data transmission rate for each access network into two or more access networks. And a partial data extracting unit 120 for extracting two or more pieces of partial data for which transmission time information is recognized from the partial data received through a specific access network among two or more access networks, and the two or more extracted networks. A transmission time checking unit 130 for checking a data transmission time interval between the two or more partial data based on each transmission time information recognized in each of the partial data, and measuring a data receiving time interval between the extracted two or more partial data; Receiving time measuring unit 140 and the data transmission time interval and the measured data Based on the reception time interval, and a controller 150 for acquiring the network status information for the specific access network.

The communication unit 110 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.

Accordingly, the communication unit 110 receives the partial data through each of two or more access networks.

The partial data extracting unit 120 extracts two or more pieces of partial data for which transmission time information is recognized from the partial data received through a specific connection network among two or more connection networks.

That is, the partial data extracting unit 120 may extract two or more pieces of partial data in which the inserted transmission time information is recognized from the partial data transmitted through each of two or more access networks (eg, 3G and WiFi). According to the example described with reference to FIG. 1 as described above, the partial data extractor 120 may extract two partial data packets 1 and 2 and two partial data packets 8 and 9 corresponding to the 3G network. In response to the WiFi network, two partial data packets 3 and 4 and two partial data packets 6 and 7 may be extracted. Here, the partial data packets 1 and 2 correspond to one partial data set corresponding to the 3G network, and the partial data packets 8 and 9 correspond to one partial data set and the partial data packets 3 and 4 corresponding to the WiFi network. Corresponds to one partial data set, the partial data packets 6 and 7 correspond to one partial data set.

The transmission time checking unit 130 checks the data transmission time interval between the two or more pieces of partial data based on the transmission time information recognized in each of the two or more pieces of the partial data extracted by the partial data extracting unit 120.

That is, the transmission time checker 130 is composed of two partial data packets 1, 2 and two partial data packets 8 and 9 extracted corresponding to a specific access network, for example, 3G network. Corresponding to each of the partial data sets, the data transmission time interval (x_i) between the partial data packet 1 and the partial data packet 2 can be confirmed through the transmission time information inserted into each partial data packet in each partial data set. The data transmission time interval x_i between 8 and the partial data packet 9 can be checked.

The reception time measurement unit 140 measures a data reception time interval between the two or more pieces of partial data extracted by the partial data extraction unit 120.

That is, the reception time measuring unit 140 is composed of two partial data packets 1, 2 and two partial data packets 8 and 9 extracted corresponding to a specific access network, for example, 3G network. Corresponding to each of the partial data sets, it is possible to obtain a data reception time interval y_i between the partial data packet 1 and the partial data packet 2 by measuring the difference in the reception time at which each partial data packet in each partial data set is received. The data reception time interval y_i between the packet 8 and the partial data packet 9 can be checked.

The controller 150 obtains network state information for the specific access network based on the identified data transmission time interval and the measured data reception time interval corresponding to each partial data set.

That is, the controller 150 is based on the data transmission time interval (x_i) and the measured data reception time interval (y_i) confirmed as described above for each partial data set corresponding to a specific access network, for example, 3G network. The network state of the corresponding 3G network may be determined to obtain network state information corresponding thereto.

In more detail, the controller 150 may determine the data transmission time interval x_i and the measured data reception time interval y_i identified as described above for each partial data set corresponding to a specific access network, for example, a 3G network. The transmission delay difference value gap_i corresponding to each of the partial data sets may be calculated based on the.

Preferably, the transmission delay difference value gap_i may be calculated through Equation 1 described above.

Accordingly, the controller 150 determines a transmission delay difference for each partial data set (for example, two partial data packets 1, 2 and two partial data packets 8, 9, etc.) corresponding to a specific access network, for example, a 3G network. The value gap_i can be calculated.

In this case, the controller 150 may include the first condition and the confirmed first data belonging to the specific exclusion time interval, among the two or more partial data sets included in the two or more partial data and configured to be adjacent to each other. It is preferable to exclude the specific partial data set that satisfies at least one of the second conditions larger than the measured data receiving time interval from which the data transmission time interval is measured so as not to be used for obtaining network state information for the specific access network. Do.

That is, the controller 150 checks the partial data set corresponding to the 3G network before calculating the transmission delay difference value gap_i for each partial data set as described above corresponding to the specific access network, for example, the 3G network. For the partial dataset whose data transmission time interval (x_i) meets the first condition belonging to the specific exclusion time interval, it is excluded from the calculation of the transmission delay difference (gap_i) so that it is not used to obtain network status information for the 3G network. It is preferable to make it.

In addition, the control unit 150, prior to calculating the transmission delay difference value (gap_i) for each partial data set as described above corresponding to a specific access network, for example, 3G network, the data of the partial data set corresponding to the 3G network The second condition in which the transmission time interval x_i is larger than the data reception time interval y_i is excluded from the calculation of the transmission delay difference value gap_i so as not to be used for obtaining the network status information for the 3G network for the specific partial data set. It is preferable.

As such, by excluding the partial data set that satisfies the first condition and / or the second condition so as not to be used for obtaining the network state information, the reliability and accuracy of the finally obtained network state information can be increased.

Thereafter, the controller 150 determines a specific access network, that is, a 3G network, based on a difference value (delta_i) between neighboring transmission delay differences among the transmission delay differences (gap_i) calculated for each partial data set. Network status information can be obtained.

Preferably, the network state information may be obtained through the above-described equations 2 and 3.

Thus, for example, the controller 150 corresponds to a specific access network, that is, a 3G network, through each partial data set (for example, two partial data packets 1, 2 and two partial data packets 8, 9) through Equation 1 described above. After calculating the transmission delay difference (gap_i) corresponding to the transmission delay difference (gap_i), the neighboring transmission delay value, i.e. immediately before neighboring the transmission delay difference value (gap_i) for the two partial data packets 8, 9, as shown in Equation 2 The difference value delta_i between the transmission delay difference values gap_ (i-1) for the two partial data packets 1 and 2 may be calculated.

The controller 150 may calculate Sum_N for the 3G network through Equation 3 by adding the N difference values delta_i calculated as described above.

Accordingly, the controller 150 may acquire network state information indicating the degree of congestion for the 3G network using Sum_N calculated for the 3G network.

That is, if Sum_N has a negative value, it may be determined that the transmission delay difference value gap_i is decreasing, and it may be determined that the access network having the negative value Sum_N is congested, and the controller 150 may determine that the negative value of Sum_N is congested. As the absolute value is larger, the degree of congestion is determined to be greater, and network state information corresponding thereto may be obtained.

Of course, the controller 150 may obtain network state information on the WiFi network through a process in which Equation 1, Equation 2, and Equation 3 are also reflected in response to the WiFi network.

Thus, for example, the controller 150 determines that congestion does not occur for a 3G network having a positive number when the Sum_N of the 3G network extracted and calculated in an arbitrary period has a positive number and the Sum_N of the WiFi network has a negative number. Network status information that leads to increase the transmission rate to the 3G network, determines that congestion has occurred for the WiFi network with negative numbers, and generates network state information that leads to reducing the transmission rate to the WiFi network. something to do.

Here, the adjustment policy for adjusting the data transmission rate for each access network based on the calculated network state information for each access network generated / acquired based on the calculated Sum_N for each access network, the receiving device 100 And / or in the transmitting device 400.

Accordingly, the controller 150 notifies the transmitting apparatus 400 that transmits the partial data divided from the transmission target data based on the network state information of each of the specific access network, that is, the 3G network and the WiFi network, obtained as described above. Adjust the data transmission rate for each access network.

For example, the controller 150 may provide the network state information of each of the 3G network and the WiFi network to the transmitting device 400 so that the transmitting device 400 may adjust the data transmission rate for each access network. .

Accordingly, the transmitting device 400, based on the network status information of each of the 3G network and WiFi network provided from the receiving device 100, the data transmission rate for each access network (for example, 3G: WiFi = 2: 5 ) Can be adjusted by the data transmission rate (eg 3G: WiFi = 4: 3) for each access network according to the adjustment policy.

Alternatively, the controller 150 determines a data transmission rate (eg, 3G: WiFi = 4: 3) for each access network according to the adjustment policy based on the network state information of each of the 3G network and the WiFi network, and determines the determined access network for each access network. The data transmission rate may be requested by the transmitting device 400 to adjust the data transmission rate for each access network.

Accordingly, the transmitting device 400, the data transmission rate for each access network (for example, 3G: WiFi = 4: 3) that is requested to adjust from the receiving device 100, the data transmission rate for each access network (for example, 3G) : WiFi = 2: 5) can be adjusted.

As described above, according to the heterogeneous network-based simultaneous data transmission and reception apparatus and the heterogeneous network-based simultaneous data transmission apparatus according to the present invention, a simultaneous transmission service for transmitting / receiving partial data obtained by using a plurality of heterogeneous networks In the environment of providing a network, the receiving device is based on reliable information, i.e., based on the reliable information, that is, the partial data transmission time interval and the partial data reception time interval for each network. By determining the status quickly and accurately, and dynamically adjusting the data transmission rate for each network of the transmitting apparatus based on this, it is possible to improve the data transmission performance in the simultaneous transmission service environment by reflecting the optimal data transmission rate for each network.

Hereinafter, a heterogeneous network-based data transmission method according to a preferred embodiment of the present invention will be described with reference to FIGS. 4 to 6. Here, for convenience of description, the components shown in FIGS. 1 to 3 will be described with reference to corresponding reference numerals.

First, an operation flow in a heterogeneous network-based data transmission system according to a preferred embodiment of the present invention will be described with reference to FIG. 4.

For convenience of description, the downlink is described with reference to the management apparatus 400 as the transmitting device, based on the data transmission rate (eg, 3G: WiFi = 2: 5) of two or more access networks. The divided partial data is selected for each of the two or more access networks (S20).

In this case, the management apparatus 400 may insert the transmission time information into two or more pieces of partial data selected from the partial data corresponding to the specific access network (S25). Here, the specific access network may correspond to any one of two or more access networks (eg, 3G and WiFi), and may correspond to each of two or more access networks (eg, 3G and WiFi).

That is, the management device 400 may insert transmission time information into at least two partial data of the first partial data selected corresponding to the first network (eg, 3G) among two or more access networks (eg, 3G and WiFi). Can be. For example, the management device 400 selects two neighboring partial data packets among the first partial data selected corresponding to the first network (eg, 3G), and applies the corresponding partial data to each of the selected two partial data packets. Transmission time information corresponding to a time at which a packet is selected to be transmitted / transmitted through a first network (eg, 3G) may be inserted.

Meanwhile, the management device 400 may insert transmission time information into at least two partial data of the second partial data selected corresponding to the second network (eg, WiFi) among two or more access networks (eg, 3G and WiFi). Can be. For example, the management apparatus 400 selects two neighboring partial data packets among the second partial data selected corresponding to the second network (eg, WiFi), and corresponding partial data to each of the selected two partial data packets. Transmission time information corresponding to a time at which a packet is selected to be transmitted / transmitted through a second network (eg, WiFi) may be inserted.

In addition, the management apparatus 400 transmits each partial data selected for each of two or more access networks through a corresponding access network.

That is, the management device 400 transmits the partial data selected for each access network (eg, 3G and WiFi) to each access network (eg, 3G and WiFi), and the first network device 200 transmits the management device ( The first partial data transmitted from 400 is transmitted to the terminal device 100 (S30), and the second network device 300 transmits the second partial data transmitted from the management device 400 to the terminal device 100. It is made (S40).

Accordingly, the terminal apparatus 100 as a receiving side apparatus of the present invention receives the partial data through two or more access networks, rearranges them according to the division order based on the received order information of the partial data, and normally rearranges the partial data. By combining, the data to be transmitted can be restored.

The terminal device 100 extracts two or more pieces of partial data for which transmission time information is recognized from the partial data transmitted through a specific connection network among two or more access networks (S50). That is, the terminal device 100 may extract two or more pieces of partial data in which the inserted transmission time information is recognized from the partial data transmitted through each of two or more access networks (eg, 3G and WiFi).

The terminal apparatus 100 checks a data transmission time interval between two or more pieces of partial data based on each transmission time information recognized in each of the extracted two or more pieces of partial data, and measures a data reception time interval between two or more pieces of extracted partial data. (S60).

In addition, the terminal device 100 obtains network state information on the corresponding specific access network based on the confirmed data transmission time interval and the measured data reception time interval (S70).

Accordingly, the terminal device 100, based on the network state information of each of the specific access network, i.e., the 3G network and the WiFi network, obtained as described above, the transmitting device that transmits the partial data divided from the transmission target data, that is, the management device ( In step S80, the data transmission rate for each access network is adjusted.

For example, the terminal device 100 may provide the network state information of each of the 3G network and the WiFi network to the management device 400 so that the management device 400 may use the data transmission rate for each access network.

Thus, the management device 400, based on the network status information of each of the 3G network and the WiFi network provided from the terminal device 100 preset data transmission rate for each access network (for example, 3G: WiFi = 2: 5) According to the adjustment policy, the data transmission rate per access network (eg 3G: WiFi = 4: 3) can be adjusted (S90).

Alternatively, the terminal device 100 determines a data transmission rate (eg, 3G: WiFi = 4: 3) for each access network according to the adjustment policy based on the network state information of each of the 3G network and the WiFi network, and determines the determined access network. The management apparatus 400 may request to adjust the data transmission rate for each access network by the data transmission rate for each connection.

Thus, the management device 400, the data transmission rate for each access network (eg, 3G: WiFi = 4: 3) that is requested to adjust from the terminal device 100, the data transmission rate for each access network (for example, 3G: WiFi) = 2: 5) can be adjusted (S90).

Hereinafter, a heterogeneous network-based simultaneous data transmission method according to the present invention will be described in more detail with reference to FIG. 5.

In the heterogeneous network-based data transmission method of the present invention, the partial data divided from the data to be transmitted is selected for each access network based on a data transmission rate (eg, 3G: WiFi = 2: 5) of two or more preset access networks. (S110).

That is, in the heterogeneous network-based data transmission method of the present invention, when receiving the transmission target data to be transmitted to the receiving device 100, the data is divided into partial data, and the data transmission rate for each access network (eg, 3G and WiFi), that is, The first transmission rate for data transmission to the first network device 200 and the second transmission rate for data transmission to the second network device 300 are checked, and are divided from the transmission target data based on the confirmed transmission rate. The first partial data to be transmitted to the first network device 200 is selected from the partial data, and the second partial data to be transmitted to the second network device 300 is selected from the remaining partial data.

In the heterogeneous network-based data transmission method according to the present invention, transmission time information is inserted into at least two pieces of partial data among pieces of selected partial data corresponding to a specific access network (S120). Here, the specific access network may correspond to any one of two or more access networks (eg, 3G and WiFi), and may correspond to each of two or more access networks (eg, 3G and WiFi).

That is, the heterogeneous network-based data transmission method of the present invention transmits to two or more pieces of partial data among the first pieces of data selected corresponding to the first network (eg, 3G) of two or more access networks (eg, 3G and WiFi). Time information can be inserted. For example, the heterogeneous network-based data transmission method of the present invention selects two neighboring partial data packets among the first partial data selected corresponding to the first network (eg, 3G), and selects the selected two partial data packets. Transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through the first network (eg, 3G) may be inserted.

On the other hand, the heterogeneous network-based data transmission method of the present invention, transmitting to a specific two or more pieces of partial data of the second partial data selected corresponding to the second network (eg, WiFi) of two or more access networks (eg, 3G and WiFi). Time information can be inserted. For example, the heterogeneous network-based data transmission method of the present invention selects two neighboring partial data packets among the second partial data selected corresponding to the second network (eg, WiFi), and selects the selected two partial data packets. Transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through a second network (for example, WiFi) may be inserted.

1, the partial data packets 1 and 2 are selected to be transmitted through the 3G network, the partial data packets 3 and 4 are selected to be transmitted through the WiFi network, and the partial data packets 5 and 3 are transmitted through the 3G network. Assume that the user selects and transmits the partial data packets 6 and 7 through the WiFi network and the partial data 8 and 9 is selected through the 3G network.

In this case, in the heterogeneous network-based data transmission method of the present invention, two partial data packets 1 having neighboring sequence information among the first partial data selected corresponding to the 3G network, that is, partial data packets 1,2,5,8,9 It is possible to select two partial data packets 8 and 9 having the order information neighboring 2 and 2. In the heterogeneous network-based data transmission method of the present invention, transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through the 3G network is respectively provided for the partial data packets 1, 2, 8, and 9. Can be inserted.

Of course, the heterogeneous network-based data transmission method of the present invention includes two partial data packets 3, 4 having neighboring sequence information among the second partial data selected corresponding to the WiFi network, that is, the partial data packets 3, 4, 6, and 7. And two partial data packets 6 and 7 having neighboring order information. In the heterogeneous network-based data transmission method of the present invention, the partial data packets 3, 4, 6, and 7 respectively transmit transmission time information corresponding to a time at which the corresponding partial data packet is selected to be transmitted / transmitted through the WiFi network. Can be inserted.

The heterogeneous network-based data transmission method of the present invention transmits each partial data selected for each of two or more access networks, that is, partial data including partial data into which transmission time information is inserted as described above through the corresponding access network ( S130).

That is, the heterogeneous network-based data transmission method of the present invention transmits a plurality of pieces of first partial data selected in response to a 3G network to the first network device 200 located in the 3G network, and selects a plurality of selected partial data in response to a WiFi network. By transmitting the second partial data of the second network head 300 located in the WiFi network, the first network device 200 transmits the first partial data to the receiving device 100, the second network device 300 ) Transmits the second partial data to the receiving apparatus 100.

In the heterogeneous network-based data transmission method of the present invention, a data transmission time interval identified by the receiving apparatus 100 in response to the two or more pieces of partial data according to whether the transmission time information inserted into the specific two or more pieces of data is transmitted. And a data transmission rate for each preset access network according to the network state information for the specific access network obtained based on the measured data reception time interval (S140 and S150).

That is, as described above, the reception apparatus 100 may provide network status information of each of the 3G network and the WiFi network to the transmitting apparatus 400 so that the transmitting apparatus 400 may use the data transmission rate for each access network. have.

In this case, the heterogeneous network-based data transmission method of the present invention, based on the network status information of each of the 3G network and WiFi network provided from the receiving device (S140) preset data transmission rate for each access network (for example: 3G: WiFi = 2: 5) can be adjusted to the data transmission rate (eg 3G: WiFi = 4: 3) for each access network according to the adjustment policy (S150).

Alternatively, the reception apparatus 100 determines a data transmission rate for each access network (eg, 3G: WiFi = 4: 3) based on the network state information of each of the 3G network and the WiFi network, and determines the access network. As a specific data transmission rate, the transmitting side device 400 may request to adjust a preset data transmission rate for each access network.

In this case, the heterogeneous network-based data transmission method of the present invention, based on the adjustment request received from the receiving apparatus 100 (S140), the data transmission rate for each access network that is requested for adjustment (eg 3G: WiFi = 4: 3) it is possible to adjust the data transmission rate (eg 3G: WiFi = 2: 5) for each preset access network (S150).

Hereinafter, a heterogeneous network-based simultaneous data transmission / reception method according to the present invention will be described in detail with reference to FIG. 6.

In the heterogeneous network-based data transmission and reception method of the present invention, partial data is received through each of two or more access networks (S200).

In the heterogeneous network-based simultaneous data transmission / reception method of the present invention, two or more pieces of partial data for which transmission time information is recognized are extracted from partial data received through a specific access network among two or more access networks (S210).

That is, the heterogeneous network-based data transmission and reception method of the present invention may extract two or more pieces of partial data in which inserted transmission time information is recognized from partial data transmitted through two or more access networks (eg, 3G and WiFi). have. According to the example described with reference to FIG. 1 as described above, the heterogeneous network-based data transmission and reception method according to the present invention includes a partial data packet pair having neighboring sequence information corresponding to a 3G network, that is, two partial data packets 1. 2 and two partial data packets 8 and 9 can be extracted, and two partial data packets 3 and 4 and two partial data packets 6 and 7 can be extracted corresponding to the WiFi network.

Here, the partial data packets 1 and 2 correspond to one partial data set corresponding to the 3G network, and the partial data packets 8 and 9 correspond to one partial data set and the partial data packets 3 and 4 corresponding to the WiFi network. Corresponds to one partial data set, the partial data packets 6 and 7 correspond to one partial data set.

In the heterogeneous network-based data simultaneous transmission / reception method of the present invention, on the basis of each transmission time information recognized in each of the extracted two or more pieces of partial data, the data transmission time interval between the two or more pieces of data is checked (S220).

That is, the heterogeneous network-based data transmission and reception method according to the present invention may include a partial data set consisting of two partial data packets 1 and 2 extracted corresponding to a specific access network, for example, a 3G network, two partial data packets 8, Corresponding to each of the partial data sets consisting of 9, the data transmission time interval (x_i) between the partial data packet 1 and the partial data packet 2 can be confirmed through the transmission time information inserted into each partial data packet in each partial data set. The data transmission time interval x_i between the partial data packet 8 and the partial data packet 9 can be checked.

In the heterogeneous network-based data transmission and reception method of the present invention, the data reception time interval between the extracted two or more pieces of data is measured (S220).

That is, the heterogeneous network-based data transmission and reception method according to the present invention may include a partial data set consisting of two partial data packets 1 and 2 extracted corresponding to a specific access network, for example, a 3G network, two partial data packets 8, Corresponding to each of the partial data sets consisting of 9, the data receiving time interval y_i between the partial data packet 1 and the partial data packet 2 can be obtained by measuring the difference in the reception time at which each partial data packet in each partial data set is received. The data reception time interval y_i between the partial data packet 8 and the partial data packet 9 can be checked.

The heterogeneous network-based simultaneous data transmission / reception method of the present invention obtains network state information on the specific access network based on the identified data transmission time interval and the measured data reception time interval (S240).

That is, in the heterogeneous network-based data transmission and reception method of the present invention, the data transmission time interval (x_i) and the measured data reception time identified as described above for each partial data set corresponding to a specific access network, for example, a 3G network. Based on the interval y_i, the network state of the corresponding 3G network may be determined to obtain network state information corresponding thereto.

More specifically, the heterogeneous network-based data transmission and reception method according to the present invention includes a data transmission time interval (x_i) and the measured data transmission time intervals as described above for each partial data set corresponding to a specific access network, for example, a 3G network. The transmission delay difference value gap_i corresponding to each of the partial data sets may be calculated based on the data reception time interval y_i.

Preferably, the transmission delay difference value gap_i may be calculated through Equation 1 described above.

Accordingly, the heterogeneous network-based data transmission / reception method of the present invention may include each partial data set (eg, two partial data packets 1 and 2 and two partial data packets 8 and 9 corresponding to a specific access network, for example, a 3G network). Etc.) can be calculated.

At this time, the heterogeneous network-based data transmission and reception method of the present invention, before performing step S240, of the two or more partial data sets included in the two or more partial data and composed of neighboring partial data, the identified data transmission Accessing the specific partial data set satisfying at least one of a first condition in which a time interval belongs to a specific exclusion time interval and a second condition in which the identified data transmission time interval is larger than the measured data reception time interval; It is desirable to exclude the data from being used to obtain network status information about the network.

That is, the heterogeneous network-based simultaneous data transmission / reception method of the present invention corresponds to a specific access network, for example, a 3G network, prior to calculating the transmission delay difference value (gap_i) for each partial data set as described above. For a specific partial data set whose data transmission time interval (x_i) identified among the corresponding partial data sets satisfies the first condition belonging to the specific exclusion time interval, the transmission delay difference is not used to obtain network status information for the 3G network. It is desirable to exclude it from calculating the value gap_i.

In addition, the heterogeneous network-based data simultaneous transmission and reception method of the present invention, prior to calculating the transmission delay difference value (gap_i) for each partial data set as described above corresponding to a specific access network, for example, 3G network, to the 3G network. Transmission delay difference value so that the second condition in which the data transmission time interval x_i is larger than the data reception time interval y_i among the corresponding partial data sets is not used for obtaining the network status information for the 3G network for the specific partial data set. It is preferable to exclude from the (gap_i) calculation.

As such, by excluding the partial data set that satisfies the first condition and / or the second condition so as not to be used for obtaining the network state information, the reliability and accuracy of the finally obtained network state information can be increased.

Then, the heterogeneous network-based simultaneous data transmission / reception method of the present invention is based on a difference value (delta_i) between neighboring transmission delay differences among the transmission delay differences (gap_i) calculated for each partial data set. It is possible to obtain network state information for a specific access network, that is, a 3G network.

Preferably, the network state information may be obtained through the above-described equations 2 and 3.

For example, in the heterogeneous network-based data transmission and reception method according to the present invention, each partial data set (for example, two partial data packets 1, 2, and 2 through Equation 1 above) corresponds to a specific access network, that is, a 3G network. After calculating the transmission delay difference value (gap_i) corresponding to the partial data packets 8, 9, etc.), as shown in Equation 2, the transmission delay difference values between neighboring transmission delay values, that is, two partial data packets 8, 9 The difference value delta_i between the gap_i and the transmission delay difference values gap_ (i-1) for the two partial data packets 1 and 2 immediately before the neighbor can be calculated.

In the heterogeneous network-based simultaneous data transmission / reception method of the present invention, Sum_N for a 3G network may be calculated through Equation 3 by adding the N difference values delta_i calculated as described above.

Accordingly, the heterogeneous network-based data transmission / reception method of the present invention may acquire network state information indicating the degree of congestion for the 3G network using Sum_N calculated for the 3G network.

That is, if Sum_N has a negative value, it may be determined that the transmission delay difference value gap_i is decreasing, and thus, it may be determined that the access network having a negative value Sum_N is congested and simultaneously transmits heterogeneous network-based data of the present invention. The transmission / reception method may determine that the degree of congestion is greater as the negative absolute value of Sum_N is greater, and thus obtain network state information corresponding thereto.

Of course, the heterogeneous network-based data transmission and reception method according to the present invention may obtain network state information on the WiFi network through a process in which Equation 1, Equation 2, and Equation 3 are also reflected corresponding to the WiFi network.

Thus, for example, the heterogeneous network-based data simultaneous transmission and reception method of the present invention, if the Sum_N of the 3G network extracted and calculated in a random interval, the Sum_N of the WiFi network has a negative number, the 3G network having a positive number Network status information to determine that no congestion occurs and to increase the transmission rate to the 3G network, and to determine that congestion has occurred for a negative WiFi network and to reduce the transmission rate to the WiFi network. It will generate and obtain network status information.

Here, the adjustment policy for adjusting the data transmission rate for each access network based on the calculated network state information for each access network generated / acquired based on the calculated Sum_N for each access network, the receiving device 100 And / or in the transmitting device 400.

Accordingly, the heterogeneous network-based data transmission and reception method according to the present invention is based on the network state information of each of a specific access network, that is, a 3G network and a WiFi network, obtained as described above. In step S250, the device 400 adjusts a data transmission rate for each access network.

For example, the heterogeneous network-based data transmission and reception method of the present invention provides the network state information of each of the 3G network and the WiFi network to the transmitting device 400 so that the transmitting device 400 transmits the data transmission rate for each access network. Can be used for adjustment.

Accordingly, the transmitting device 400, based on the network status information of each of the 3G network and WiFi network provided from the receiving device 100, the data transmission rate for each access network (for example, 3G: WiFi = 2: 5 ) Can be adjusted by the data transmission rate (eg 3G: WiFi = 4: 3) for each access network according to the adjustment policy.

Alternatively, in the heterogeneous network-based data transmission and reception method of the present invention, a data transmission rate (eg 3G: WiFi = 4: 3) for each access network according to a coordination policy based on the network state information of each of the 3G network and the WiFi network. After the determination, the requesting apparatus 400 may request the transmitting device 400 to adjust the data transmission rate for each access network.

Accordingly, the transmitting device 400, the data transmission rate for each access network (for example, 3G: WiFi = 4: 3) that is requested to adjust from the receiving device 100, the data transmission rate for each access network (for example, 3G) : WiFi = 2: 5) can be adjusted.

As described above, according to the heterogeneous network-based simultaneous data transmission and reception method and the heterogeneous network-based data simultaneous transmission method according to the present invention, a simultaneous transmission service for transmitting / receiving partial data obtained by using a plurality of heterogeneous networks In the environment of providing a network, the receiving device is based on reliable information, i.e., based on the reliable information, that is, the partial data transmission time interval and the partial data reception time interval for each network. By determining the status quickly and accurately, and dynamically adjusting the data transmission rate for each network of the transmitting apparatus based on this, it is possible to improve the data transmission performance in the simultaneous transmission service environment by reflecting the optimal data transmission rate for each network.

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 a RAM memory, a flash memory, a ROM memory, an EPROM memory, an 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 user terminal device. In the alternative, the processor and the storage medium may be included as separate components within the user 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 simultaneous data transmission and reception apparatus and transmission method and heterogeneous network-based data simultaneous transmission and transmission method according to the present invention, a simultaneous transmission service for transmitting / receiving partial data divided data using a plurality of heterogeneous networks In the environment of providing a network, the receiving device is based on reliable information, i.e., based on the reliable information, that is, the partial data transmission time interval and the partial data reception time interval for each network. It is possible to determine the status quickly and accurately, and dynamically adjust the data transmission rate for each network of the sending device based on this, thus exceeding the limitations of the existing technology. Or there is enough possibility of business Since not much that can be apparently carried out in reality the invention there is industrial applicability.

100: terminal device
110: communication unit 120: partial data extraction unit
130: transmission time check unit 140: reception time measurement unit
150:

Claims (10)

A communication unit configured to receive, through at least two access networks, partial data divided from data to be transmitted based on a preset data transmission rate for each access network;
A partial data extracting unit for extracting two or more pieces of partial data of which transmission time information is recognized from the pieces of partial data received through a specific access network of the two or more access networks;
A transmission time checking unit for checking a data transmission time interval between the two or more pieces of partial data based on each transmission time information recognized by each of the extracted two or more pieces of data;
A reception time measurement unit for measuring a data reception time interval between the extracted two or more partial data; And
And a controller for acquiring network state information for the specific access network based on the identified data transmission time interval and the measured data reception time interval. The method of claim 1,
The control unit,
Heterogeneous network-based simultaneous, characterized in that to adjust the data transmission rate for each of the access network preset to the transmitting device for transmitting the partial data divided from the transmission target data based on the obtained network state information of the specific access network. Transmission transceiver. The method of claim 1,
The two or more partial data,
Heterogeneous network-based simultaneous transmission and reception apparatus, characterized in that the neighboring data. The method of claim 1,
The control unit,
Each of the two or more partial data sets based on the data transmission time interval and the measured data reception time interval that are identified corresponding to each of the two or more partial data sets included in the two or more partial data and composed of neighboring partial data; Calculate the transmission delay difference value corresponding to
Heterogeneous network-based information, characterized in that for obtaining the network state information for the particular access network based on the difference between the neighboring transmission delay value of the transmission delay difference value calculated for each of the two or more partial data set. Simultaneous transmission transceiver. The method of claim 1,
The control unit,
Among the two or more partial data sets included in the two or more partial data and configured to be adjacent to each other, a first condition in which the confirmed data transmission time interval belongs to a specific exclusion time interval and the identified data transmission time interval are measured. Heterogeneous network-based simultaneous transmission, characterized in that the particular partial data set that satisfies at least one of the second conditions larger than the received data interval is excluded from being used for acquiring network state information for the specific access network. Transceiver. A partial data selecting unit selecting partial data divided from the transmission target data for each connection network based on a preset data transmission rate for each connection network;
An information insertion unit for inserting transmission time information into two or more pieces of partial data selected from the partial data corresponding to the specific access network;
A communication unit which transmits the selected partial data for each access network through each access network; And
The specific connection acquired based on a data transmission time interval and a measured data reception time interval that are identified at a receiving apparatus corresponding to the two or more partial data according to whether the transmission time information inserted into the specific two or more partial data transmitted And a controller for adjusting a data transmission rate for each of the preset access networks according to network state information of a network. A partial data receiving step of receiving, through at least two access networks, partial data divided from data to be transmitted based on a preset data transmission rate for each access network;
A partial data extraction step of extracting two or more pieces of partial data of which transmission time information is recognized from the pieces of partial data received through a specific access network of the two or more access networks;
A transmission time checking step of checking a data transmission time interval between the two or more pieces of partial data based on each transmission time information recognized by each of the extracted two or more pieces of data;
A reception time measurement step of measuring a data reception time interval between the extracted two or more partial data; And
Heterogeneous network-based simultaneous transmission and reception method comprising the step of acquiring network status information for the specific access network based on the identified data transmission time interval and the measured data reception time interval . The method of claim 7, wherein
And adjusting the data transmission rate for each of the access networks, which is preset in the transmitting device that transmits the partial data divided from the transmission target data, based on the obtained network state information of the specific access network. Heterogeneous network-based simultaneous transmission transmission and reception method. The method of claim 7, wherein
The network state information obtaining step,
Each of the two or more partial data sets based on the data transmission time interval and the measured data reception time interval that are identified corresponding to each of the two or more partial data sets included in the two or more partial data and composed of neighboring partial data; Calculating a transmission delay difference value in correspondence with
Acquiring network state information for the particular access network based on a difference value between neighboring transmission delay differences among the transmission delay differences calculated for each of the at least two partial data sets. Heterogeneous network-based simultaneous transmission transmission and reception method. The method of claim 7, wherein
The network state information obtaining step,
Among the two or more partial data sets included in the two or more partial data and configured to be adjacent to each other, a first condition in which the confirmed data transmission time interval belongs to a specific exclusion time interval and the identified data transmission time interval are measured. Heterogeneous network-based simultaneous transmission, characterized in that the particular partial data set that satisfies at least one of the second conditions larger than the received data interval is excluded from being used for acquiring network state information for the specific access network. How to send and receive.

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