KR101211701B1 - Apparatus and method for simultaneously transmitting data in heterogeneous network - Google Patents

Abstract

The present invention discloses a heterogeneous network-based data transmission service method. That is, a transmission waiting time checking step of checking, by the transmitting apparatus, a difference in transmission waiting time required for data transmission between access networks; When the transmitter determines the difference between the identified transmission wait times exceeds a threshold, the transmitter calculates a multiple value for the transmission wait time for each access network and sequentially arranges the calculated multiples of the access networks according to the size. Arrangement step; A network selection step of the transmission apparatus selecting an access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values; A data transmission step of the transmission apparatus selecting partial data corresponding to the selected transmission target network and transmitting the partial data to the reception apparatus; And a data receiving step of restoring the data to be transmitted by combining the partial data received for each access network by the receiving apparatus, thereby improving data quality and improving network data quality by efficiently transferring data traffic for each access network. Stability can be secured.

Description

Heterogeneous network-based data transmission service method and apparatus applied thereto {APPARATUS AND METHOD FOR SIMULTANEOUSLY TRANSMITTING DATA IN HETEROGENEOUS NETWORK}

The present invention relates to a data simultaneous transmission method, and more particularly, when the difference in transmission latency between access networks required for data transmission in a heterogeneous network environment exceeds a threshold, by access network A heterogeneous network-based simultaneous data transmission service method for selecting a transmission target network based on transmission latency and efficiently transferring data traffic for each access network in consideration of performance differences for each access network, a transmission apparatus, and a transmission apparatus and A method of operating a transmitter.

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 a recent short-range wireless network. Recently, Long Term Evolution (LTE) networks have been actively introduced.

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

Meanwhile, as various wireless devices such as smartphones and tablet PCs are increasing, 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, there is a need for a new service method for efficiently selecting an access network of a terminal device according to the state of a network in a heterogeneous network environment where a plurality of networks are mixed and efficiently transmitting data using the selected network.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to determine a difference in transmission latency required for a transmission apparatus to transmit data between access networks, and to confirm the difference in transmission latency identified above. When the value exceeds the threshold, the multiple value of the transmission latency for each access network is calculated, and the calculated multiple value of each access network is sequentially arranged according to the size, and each multiple value is arranged according to the arrangement order of the multiple value. Selecting a corresponding access network as the transmission target network, selecting partial data corresponding to the selected transmission target network, and transmitting the selected partial data to a receiving apparatus, and the receiving apparatus combines each piece of partial data received for each access network, Heterogeneous network-based data transmission service method for restoring data to be transmitted When the difference in the latency of transmission between access networks exceeds the threshold, the transmission target network is selected based on the transmission latency for each access network, and data traffic for each access network is considered in consideration of the performance difference for each access network. To efficiently transfer

The present invention has been made in view of the above circumstances, and another object of the present invention is to determine a difference in transmission latency required for data transmission between access networks, and to confirm the difference in transmission latency. When the threshold value is exceeded, the transmission target network is selected based on the arrangement order according to the magnitude of the multiple of the waiting time calculated for each access network, and the partial data are selected and provided corresponding to the selected transmission target network. The present invention provides a transmitting device for transmitting the provided partial data for each access network and a method of operating the same, when a difference in transmission latency between access networks exceeds a threshold, based on the transmission wait time for each access network. Select network and consider data by access network in consideration of performance difference by access network To efficiently transition traffic.

The transmission apparatus according to the first aspect of the present invention for achieving the above object, checks the difference in the transmission standby time required for data transmission between the access network, when the difference in the confirmed transmission standby time exceeds the threshold, A network selection unit for selecting a transmission target network based on an arrangement order according to a magnitude of a multiple value of transmission latency calculated for each access network; A control unit for selecting and providing partial data corresponding to the selected transmission target network; And a communication unit configured to transmit the provided partial data for each access network.

Preferably, the network selecting unit calculates a multiple value for the transmission waiting time for each of the access networks, sequentially arranges the calculated multiples of the access networks according to the size, and according to the arrangement order of the multiple values. The access network corresponding to the multiple value is selected as the transmission target network.

Preferably, when the difference in the transmission latency exceeds a threshold, the network selecting unit selects the transmission target network based on the arrangement order according to the magnitude of the multiple value, and the difference in the transmission latency is a threshold value. If not exceeding, the transmission target network is selected according to a network selection policy for selecting partial data for each predetermined access network.

Preferably, when the difference in the data transmission rate for each access network exceeds the threshold, the network selecting unit performs the arrangement order according to the magnitude of the multiple value when the difference in the transmission latency between the access networks exceeds the threshold. The transmission target network is selected based on the above.

The heterogeneous network-based simultaneous data transmission service method according to the second aspect of the present invention for achieving the above object comprises: a transmission waiting time checking step of checking, by a transmitting device, a difference in transmission waiting time required for data transmission between access networks; When the transmitter determines the difference between the identified transmission wait times exceeds a threshold, the transmitter calculates a multiple value for the transmission wait time for each access network and sequentially arranges the calculated multiples of the access networks according to the size. Arrangement step; A network selection step of the transmission apparatus selecting an access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values; A data transmission step of the transmission apparatus selecting partial data corresponding to the selected transmission target network and transmitting the partial data to the reception apparatus; And a data receiving step in which the receiving device restores the transmission target data by combining the partial data received for each access network.

A method of operating a transmitter according to a third aspect of the present invention for achieving the above object comprises: a transmission waiting time checking step of checking a difference in transmission waiting time required for data transmission between access networks; A network selecting step of selecting a transmission target network based on an arrangement order according to a magnitude of a multiple of a transmission waiting time calculated for each access network, when the identified difference in transmission waiting time exceeds a threshold; A data selection step of selecting and providing partial data corresponding to the selected transmission target network; And a data transmission step of transmitting the provided partial data for each access network.

Preferably, the network selection step, the multiplier value array step of calculating the multiplier value for the transmission waiting time for each access network to sequentially arrange the calculated multiplier value of each access network according to the size; And a network selection step of selecting an access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values.

Preferably, in the network selecting step, when the difference in the transmission latency exceeds a threshold, the transmission target network is selected based on the arrangement order according to the magnitude of the multiple value, and the difference in the transmission latency is If the threshold value is not exceeded, the transmission target network is selected according to a network selection policy for selecting partial data for each access network.

Preferably, in the network selection step, when the difference in the data transmission rate for each access network exceeds a threshold in a state where the difference in transmission latency between the access networks exceeds a threshold, the arrangement order according to the magnitude of the multiple value. The transmission target network is selected based on the above.

Accordingly, according to the heterogeneous network-based simultaneous data transmission service method of the present invention, when the difference in transmission latency between access networks required for data transmission in a heterogeneous network environment exceeds a threshold, each access network By selecting a transmission target network based on transmission latency and selectively transmitting partial data through the selected transmission target network, data traffic quality of each access network can be efficiently transferred to improve data service quality and network stability. It can be secured.

1 is a schematic configuration diagram of a heterogeneous network-based data transmission service system according to an embodiment of the present invention.
2 is a schematic configuration diagram of a management device according to an embodiment of the present invention.
3 is a schematic flowchart illustrating a method of operating a heterogeneous network-based simultaneous data transmission service system according to an embodiment of the present invention.
4 is a schematic flowchart illustrating the operation of the management device according to an embodiment of the present invention.

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

1 is a schematic block diagram of a heterogeneous network-based simultaneous data transmission service system according to an embodiment of the present invention.

As shown in FIG. 1, the heterogeneous network-based data transmission service system according to the present invention divides data into two or more pieces of partial data, and assigns a specific virtual network to first partial data corresponding to a portion of the two or more pieces of partial data. From the management apparatus 100 and the management apparatus of the transmission apparatus which transmits including the connection information and transmitting the virtual network connection information in the second partial data corresponding to another part of the two or more partial data. The first network apparatus 200 for receiving the first partial data, the second network apparatus 300 for receiving the second partial data from the management apparatus 100 and the first network apparatus 200 from the first network apparatus 200. Receives the first partial data and the second partial data from the second network device 300, the first partial data and the virtual data included in the second partial data And a terminal device 400 as a receiving device for generating the data by combining the first partial data and the second partial data according to the specific virtual network connection information based on the network connection information. In addition, the heterogeneous network-based data transmission service system according to the present invention has a configuration that includes an external device 500 for transmitting the transmission target data to the management device 100 to request delivery to the terminal device 400.

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

Therefore, in the present invention, session division is performed in the management apparatus 100 to implement simultaneous link transmission through a plurality of heterogeneous networks for one session. In this case, since the terminal device 400 is connected to each of a plurality of heterogeneous networks, the management device 100 recognizes that the terminal device 400 is a link of one terminal device 400 for each simultaneous link through the plurality of heterogeneous networks. The terminal device 400 must be managed as one subject. To this end, it is necessary to allocate and manage separate virtual network access information (for example, virtual IP) for the transmission service in correspondence with the terminal device 400.

The external device 500 refers to a server device that performs data transmission and reception with the terminal device 400 through the management device 100, for example, to the terminal device 400 through data transmission and reception through the management device 100, Various services such as portal service and content providing service can be provided.

The heterogeneous network may correspond to various access networks including, for example, WCDMA, CDMA, WiBro, WLAN (WiFi), and Long Term Evolution (LTE). ) And a second network (hereinafter, referred to as a "3G network") and a second network (hereinafter referred to as a "WiFi network") which refer to a local area wireless network (WiFi).

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.

In addition, the management apparatus 100 and the terminal apparatus 400 may also be a transmitting apparatus according to the uplink process and the downlink process, that is, depending on the service flow, that is, the subject transmitting data using the data simultaneous transmission service. It can also be a receiver. In the present embodiment, for convenience of description, assuming a management apparatus 100 as a transmission apparatus for providing data simultaneous transmission service to a terminal apparatus 400 by being located in a heterogeneous network environment, and transmitting and receiving data with the management apparatus 100. Assuming a terminal device 400 as a receiving device to perform the following description.

The management device 100 checks the difference in transmission waiting time required for data transmission between access networks.

More specifically, the management device 100 is the status information according to the data for each access network from the terminal device 400, that is, the transmission latency (3G latency) of the 3G network and the transmission latency (WiFi latency) of the WiFi network, and Receives the difference in transmission latency between the 3G network and the WiFi network, and receives the data transmission rate (3G throughput) of the 3G network and the data throughput (WiFi throughput) of the WiFi network, and stores each information as an average value. Based on this, the management apparatus 100 checks whether the difference in the transmission latency between the currently received G network and the WiFi network exceeds a threshold (eg, 10%) compared to the average value of the transmission latency between the 3G network and the WiFi network. Done. To this end, the management apparatus 100 has first partial data (Sequence # 4) and second partial data (Sequence # 4) having neighboring sequence information (Sequence # 4, Sequence # 5) provided to the 3G network and the WiFi network, respectively. By inserting the departure time information on the header of 5) and transmitting to the terminal device 400, the terminal device 400 refers to the arrival time information to transmit the transmission waiting time (for example, 100msec) of the 3G network and the transmission of the WiFi network. Allows you to see the latency (e.g. 20msec) and the difference in latency (e.g. 80msec) between the 3G network and the WiFi network.

In addition, the management apparatus 100 calculates a multiple value of the transmission waiting time calculated for each access network.

More specifically, the management apparatus 100 calculates a multiple value for the transmission latency for each access network when the difference in the identified transmission latency exceeds a threshold, thereby increasing the calculated multiple value of each access network. Arrange them in order. For example, if the transmission wait time of the 3G network is '70msec', and the transmission wait time of the WiFi network is '30msec', the management device 100 transmits a waiting time of the 3G network, which is a multiple of the transmission wait time of the 3G network. After calculating the transmission latency vector (B = {30,60,90,120,150,180,210}) of the WiFi network, which is a vector (A = {70,140,210}) and a multiple of the transmission latency of the WiFi network, the union vector of the two vectors (C) = {30,60,70,90,120,140,150,180,210}), the multiple values of transmission latency of the 3G network and the WiFi network are sequentially arranged according to the size. In this case, the management apparatus 100 calculates a multiple value up to a minimum common multiple 210 for a transmission waiting time (30 msec) of the 3G network and a transmission waiting time (70 msec) of the WiFi network.

In addition, the management apparatus 100 selects a transmission target network based on the arrangement order according to the size of the multiple value.

More specifically, the management apparatus 100 selects the access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values sequentially arranged according to the size. In other words, the management apparatus 100 is based on the union vector of the transmission latency vector A of the 3G network and the transmission latency vector B of the WiFi network, based on C = {30,60,70,90,120,140,150,180,210}. In the case of the first partial data, the 3G network corresponding to '30' is selected as the transmission target network, and in the case of the second partial data, the 3G network corresponding to '60' is selected as the transmission target network, and in the third partial data '70' The WiFi network corresponding to 'will be selected as the transmission target network. In this case, when the 3G network and the WiFi network have the same multiple value '210', it may be desirable to select a 3G network having a small transmission waiting time as a transmission target network.

On the other hand, the management apparatus 100 sets the transmission rate for selecting partial data for each access network according to a predetermined network selection policy when the difference in the checked transmission waiting time does not exceed the threshold.

More specifically, the management apparatus 100 checks the data transmission rate of the 3G network and the data transmission rate of the WiFi network according to a predetermined network selection policy when the difference in transmission latency between the 3G network and the WiFi network does not exceed a threshold. By setting the data transmission rate between the 3G network and the WiFi network based on the confirmed data transmission rate for each network, the partial data divided from the transmission target data for each access network can be selected according to the transmission rate.

In addition, the management device 100 is a predetermined network selection policy when the difference in the data transmission rate of each of the 3G network and the WiFi network does not exceed the threshold in a state where the difference in transmission latency between the 3G network and the WiFi network exceeds the threshold. As a result, a transmission rate for selecting partial data for each access network is set.

More specifically, the management apparatus 100 is, for example, the data rate of the previously confirmed 3G network is' 1M ', the data rate of the WiFi network is' 3M', the difference between the transmission latency of the 3G network and WiFi network ' 80 msec '; If the data transmission rate of the currently confirmed 3G network is '0.95M', the data transmission rate of the WiFi network is '3M', and the difference in the transmission latency between the 3G network and the WiFi network is '150msec', Although the transmission latency difference increased from the previous value, since the data rate change of the 3G network is insignificant, as described above, the transmission rate for partial data selection for each access network is set according to the predetermined network selection policy.

Furthermore, the management device 100 selects the partial data corresponding to the transmission target network selected as described above.

More specifically, the management apparatus 100 receives the transmission target data from the external device 500, so that each partial data divided from the transmission target data can be transmitted through the selected transmission target network. The first partial data to be transmitted to the 200 is selected, and the second partial data to be transmitted to the second network device 300 is selected from the remaining partial data.

On the other hand, the management device 100 is a threshold value difference between the 3G network and the WiFi network does not exceed the threshold, or the difference in the data transmission rate of each of the 3G network and WiFi network with a difference in the transmission latency exceeds the threshold If not exceeding, select the divided partial data from the transmission target data for each access network based on the set data transmission rate for each network.

More specifically, the management device 100 receives the data to be transmitted from the external device 500 and transmits the data to the first transmission rate and the second network device 300 for data transmission to the first network device 200. Confirming the second transmission rate for the second data; selecting first partial data to be transmitted to the first network apparatus 200 among the partial data divided from the transmission target data based on the confirmed transmission rate; The second partial data to be transmitted to the network device 300 is selected.

Furthermore, the management apparatus 100 transmits the selected partial data using the corresponding network.

More specifically, the management apparatus 100 transmits the partial data selected corresponding to the transmission target network, that is, the first partial data to the first network apparatus 200 located in the 3G network, and thus the first network apparatus 200. Transmits the first partial data to the terminal device 400 as a receiving device. In addition, the management apparatus 100 transmits the second partial data to the second network apparatus 300, and causes the second network apparatus 300 to transmit the second partial data to the terminal apparatus 400 as a receiving apparatus.

The terminal device 400 receives data dividedly transmitted from the first network device 200 and the second network device 300 to restore the data.

More specifically, the terminal device 400 receives the first partial data from the first network device 200 and the second partial data from the second network device 300, and receives the received first partial data and the second. By generating data by combining the first partial data and the second partial data based on the virtual network access information included in the partial data, the management apparatus 100 restores the data to be transmitted. That is, the terminal device 400 recognizes the first partial data and the second partial data having the same virtual network connection information based on the virtual network access information included in the received partial data, and includes them in the partial data. By combining and combining according to the information, the original transmission target data can be generated.

Hereinafter, the management device 100 according to an embodiment of the present invention will be described in more detail with reference to FIG. 2.

More specifically, the management apparatus 100 includes a network selecting unit 110 for selecting a transmission target network based on a difference in transmission waiting time required for data transmission between access networks; A control unit 120 selecting and providing partial data corresponding to the selected transmission target network; And a communication unit 130 for transmitting the provided partial data for each access network. Here, the communication unit 130 refers to a communication module for interworking with the first network device 200 using the 3G network and interworking with the second network device 300 using the WiFi network.

The network selecting unit 110 checks a difference in transmission waiting time required for data transmission between access networks.

More specifically, the network selection unit 110 is a state information according to the data for each access network from the terminal device 400, that is, the transmission latency (3G latency) of the 3G network and the transmission latency (WiFi latency) of the WiFi network, In addition, the transmission latency difference between the 3G network and the WiFi network is received, and in addition, the data transmission rate (3G throughput) of the 3G network and the data throughput (WiFi throughput) of the WiFi network are received and the respective information is stored as an average value. Based on this, the network selection unit 110 determines whether the difference in transmission latency between the currently received G network and the WiFi network exceeds a threshold (eg, 10%) compared to the average value of the transmission latency between the 3G network and the WiFi network. You will be confirmed. To this end, the network selecting unit 110 may include the first partial data (Sequence # 4) and the second partial data (Sequence # 4) having neighboring sequence information (Sequence # 4, Sequence # 5) provided to the 3G network and the WiFi network, respectively. By inserting the departure time information on the header of # 5) and transmitting it to the terminal device 400, the terminal device 400 refers to the arrival time information, the transmission waiting time (eg 100msec) of the 3G network and the WiFi network It allows you to check the transmission latency (e.g. 20msec) and the difference in transmission latency (e.g. 80msec) between the 3G network and the WiFi network.

In addition, the network selecting unit 110 calculates a multiple value of the transmission waiting time calculated for each access network.

More specifically, the network selection unit 110 calculates a multiplier value for the transmission wait time for each access network when the difference in the checked transmission wait time exceeds a threshold, and calculates a multiplier value of each calculated access network. Arrange them in order according to their size. For example, the network selection unit 110, when the transmission latency of the 3G network is '70msec', the transmission latency of the WiFi network is '30msec', the transmission standby of the 3G network consisting of a multiple of the transmission latency of the 3G network. After calculating the transmission latency vector (B = {30,60,90,120,150,180,210}) of the WiFi network, which is composed of a time vector (A = {70,140,210}) and a multiple of the transmission latency of the WiFi network, the union vector of the two vectors ( By calculating C = {30, 60, 70, 90, 120, 140, 150, 180, 210}), the multiples of the transmission latency of the 3G network and the WiFi network are sequentially arranged according to the size. At this time, the network selection unit 110 calculates a multiple value up to a minimum common multiple 210 for a transmission waiting time (30 msec) of the 3G network and a transmission waiting time (70 msec) of the WiFi network.

In addition, the network selecting unit 110 selects a transmission target network based on the arrangement order according to the magnitude of the multiple value.

More specifically, the network selection unit 110 selects the access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values sequentially arranged according to the size. In other words, the network selection unit 110 is based on the union vector of the transmission latency vector (A) of the 3G network and the transmission latency vector (B) of the WiFi network, which is 'C = {30,60,70,90,120,140,150,180,210}'. In the case of the first partial data, the 3G network corresponding to '30' is selected as the transmission target network, and in the second partial data, the 3G network corresponding to '60' is selected as the transmission target network, and in the case of the third partial data, The WiFi network corresponding to 70 'is selected as the transmission target network. In this case, when the 3G network and the WiFi network have the same multiple value '210', it may be desirable to select a 3G network having a small transmission waiting time as a transmission target network.

The control unit 120 selects partial data corresponding to the transmission target network selected as described above.

More specifically, the control unit 120 receives the transmission target data from the external device 500, so that each partial data divided from the transmission target data can be transmitted through the selected transmission target network (the first network device ( In addition to selecting the first partial data to be transmitted to 200, the second partial data to be transmitted to the second network device 300 is selected from the remaining partial data.

The communication unit 130 transmits the selected partial data using the corresponding network.

More specifically, the communication unit 130 transmits the partial data selected corresponding to the transmission target network, that is, the first partial data to the first network device 200 located in the 3G network, to the first network device 200. Transmits the first partial data to the terminal device 400 as a receiving device. In addition, the communication unit 130 transmits the second partial data to the second network apparatus 300, and causes the second network apparatus 300 to transmit the second partial data to the terminal apparatus 400 as a receiving apparatus.

As described above, according to the heterogeneous network-based data transmission service system according to the present invention, a difference in transmission latency between access networks required for data transmission in a heterogeneous network environment may exceed a threshold. In this case, by selecting a transmission target network based on transmission latency of each access network and selectively transmitting partial data through the selected transmission target network, data quality of service can be improved by efficiently transferring data traffic for each access network. It can improve the network stability.

Hereinafter, a heterogeneous network-based data transmission service method according to an embodiment of the present invention will be described with reference to FIGS. 3 and 4. Here, the configurations shown in FIGS. 1 and 2 will be described with reference to corresponding reference numerals for convenience of explanation.

First, a method of operating a heterogeneous network-based simultaneous data transmission service system according to an embodiment of the present invention will be described with reference to FIG. 3.

First, the terminal device 400 provides the management device 100 with status information according to data reception for each access network (S110-S130).

Preferably, the terminal device 400 includes the first partial data (Sequence # 4) and the second having the sequence information (Sequence # 4, Sequence # 5) neighboring from the management device 100 through the 3G network and the WiFi network. Receive the partial data (Sequence # 5), the departure time information inserted on each partial data header, the arrival time information of the 3G network (for example, 100msec) and the standby time of the WiFi network ( For example, 20msec), and the transmission latency difference (for example, 80msec) between the 3G network and the WiFi network is checked, and each identified information is provided to the management apparatus 100.

Then, the management apparatus 100 checks the difference in the transmission waiting time required for data transmission between the access networks (S140).

Preferably, the management device 100 is the status information according to the data for each access network from the terminal device 400, that is, the transmission latency (3G latency) of the 3G network and the transmission latency (WiFi latency) of the WiFi network, and Receives the difference in transmission latency between the 3G network and the WiFi network, and receives the data transmission rate (3G throughput) of the 3G network and the data throughput (WiFi throughput) of the WiFi network, and stores each information as an average value. Based on this, the management apparatus 100 checks whether the difference in the transmission latency between the currently received G network and the WiFi network exceeds a threshold (eg, 10%) compared to the average value of the transmission latency between the 3G network and the WiFi network. Done.

Then, the management apparatus 100 calculates a multiple value of the transmission waiting time calculated for each access network (S150-S160).

Preferably, the management apparatus 100 calculates a multiple value of the transmission latency for each access network when the difference in the identified transmission latency exceeds a threshold, thereby increasing the calculated multiple value of each access network. Arrange them in order. For example, if the transmission wait time of the 3G network is '70msec', and the transmission wait time of the WiFi network is '30msec', the management device 100 transmits a waiting time of the 3G network, which is a multiple of the transmission wait time of the 3G network. After calculating the transmission latency vector (B = {30,60,90,120,150,180,210}) of the WiFi network, which is a vector (A = {70,140,210}) and a multiple of the transmission latency of the WiFi network, the union vector of the two vectors (C) = {30,60,70,90,120,140,150,180,210}), the multiple values of transmission latency of the 3G network and the WiFi network are sequentially arranged according to the size. In this case, in the case of a multiple value, the maximum common multiple 210 for the transmission waiting time (30 msec) of the 3G network and the transmission waiting time (70 msec) of the WiFi network is calculated.

Then, the management apparatus 100 selects a transmission target network based on the arrangement order according to the magnitude of the multiple value (S170).

Preferably, the management apparatus 100 selects the access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values sequentially arranged according to the size. In other words, the management apparatus 100 is based on the union vector of the transmission latency vector A of the 3G network and the transmission latency vector B of the WiFi network, based on C = {30,60,70,90,120,140,150,180,210}. In the case of the first partial data, the 3G network corresponding to '30' is selected as the transmission target network, and in the case of the second partial data, the 3G network corresponding to '60' is selected as the transmission target network, and in the third partial data '70' The WiFi network corresponding to 'will be selected as the transmission target network. In this case, when the 3G network and the WiFi network have the same multiple value '210', it may be desirable to select a 3G network having a small transmission waiting time as a transmission target network.

Furthermore, the management apparatus 100 selects the partial data corresponding to the transmission target network selected as described above (S180).

Preferably, the management device 100 receives the transmission target data from the external device 500, so that each partial data divided from the transmission target data can be transmitted through the selected transmission target network. The first partial data to be transmitted to the 200 is selected, and the second partial data to be transmitted to the second network device 300 is selected from the remaining partial data.

Then, the management apparatus 100 transmits the selected partial data using the corresponding network (S190).

Preferably, the management device 100 transmits the partial data selected corresponding to the transmission target network, that is, the first partial data to the first network device 200 located in the 3G network, and thus the first network device 200. Transmits the first partial data to the terminal device 400 as a receiving device. In addition, the management apparatus 100 transmits the second partial data to the second network apparatus 300, and causes the second network apparatus 300 to transmit the second partial data to the terminal apparatus 400 as a receiving apparatus.

Thereafter, the terminal device 400 receives data dividedly transmitted from the first network device 200 and the second network device 300 to restore the data (S200).

Preferably, the terminal device 400 receives the first partial data from the first network apparatus 200 and the second partial data from the second network apparatus 300, and receives the received first partial data and the second partial data. By generating data by combining the first partial data and the second partial data based on the virtual network access information included in the partial data, the management apparatus 100 restores the data to be transmitted. That is, the terminal device 400 recognizes the first partial data and the second partial data having the same virtual network connection information based on the virtual network access information included in the received partial data, and includes them in the partial data. By combining and combining according to the information, the original transmission target data can be generated.

Hereinafter, an operation method of the management apparatus 100 according to an embodiment of the present invention will be described with reference to FIG. 4.

First, the difference between the transmission waiting time required for data transmission between access networks is checked (S210).

Preferably, the network selecting unit 110 is a state information according to the data received by the access network from the terminal device 400, that is, the transmission latency (3G latency) of the 3G network and the transmission latency (WiFi latency) of the WiFi network, In addition, the transmission latency difference between the 3G network and the WiFi network is received, and in addition, the data transmission rate (3G throughput) of the 3G network and the data throughput (WiFi throughput) of the WiFi network are received and the respective information is stored as an average value. Based on this, the management apparatus 100 checks whether the difference in the transmission latency between the currently received G network and the WiFi network exceeds a threshold (eg, 10%) compared to the average value of the transmission latency between the 3G network and the WiFi network. Done.

Then, the multiple of the transmission standby time calculated for each access network is calculated (S220, S240-S250).

Preferably, the network selecting unit 110 calculates a multiple value for the transmission waiting time for each access network when the difference in the checked transmission waiting time exceeds a threshold, and calculates a multiple value of each calculated access network. Arrange them in order according to their size. For example, the network selection unit 110, when the transmission latency of the 3G network is '70msec', the transmission latency of the WiFi network is '30msec', the transmission standby of the 3G network consisting of a multiple of the transmission latency of the 3G network. After calculating the transmission latency vector (B = {30,60,90,120,150,180,210}) of the WiFi network, which is composed of a time vector (A = {70,140,210}) and a multiple of the transmission latency of the WiFi network, the union vector of the two vectors ( By calculating C = {30, 60, 70, 90, 120, 140, 150, 180, 210}), the multiples of the transmission latency of the 3G network and the WiFi network are sequentially arranged according to the size. At this time, the network selection unit 110 calculates a multiple value up to a minimum common multiple 210 for a transmission waiting time (30 msec) of the 3G network and a transmission waiting time (70 msec) of the WiFi network.

Then, the transmission target network is selected based on the arrangement order according to the magnitude of the multiple value (S260).

Preferably, the network selection unit 110 selects the access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values sequentially arranged according to the size. In other words, the network selection unit 110 is based on the union vector of the transmission latency vector (A) of the 3G network and the transmission latency vector (B) of the WiFi network, which is 'C = {30,60,70,90,120,140,150,180,210}'. In the case of the first partial data, the 3G network corresponding to '30' is selected as the transmission target network, and in the second partial data, the 3G network corresponding to '60' is selected as the transmission target network, and in the case of the third partial data, The WiFi network corresponding to 70 'is selected as the transmission target network. In this case, when the 3G network and the WiFi network have the same multiple value '210', it may be desirable to select a 3G network having a small transmission waiting time as a transmission target network.

On the other hand, if the difference between the identified transmission standby time does not exceed the threshold, the transmission rate for selecting partial data for each access network according to a predetermined network selection policy is set (S270).

Preferably, the network selecting unit 110 checks the data transmission rate of the 3G network and the data transmission rate of the WiFi network according to a predetermined network selection policy when the difference in transmission latency between the 3G network and the WiFi network does not exceed a threshold. By setting the data transmission rate between the 3G network and the WiFi network based on the confirmed data transmission rate for each network, the partial data divided from the transmission target data for each access network can be selected according to the transmission rate.

In addition, when the difference in transmission latency between the 3G network and the WiFi network exceeds the threshold, and the data rate difference of each of the 3G network and the WiFi network does not exceed the threshold, the portion of each access network according to the predetermined network selection policy The transmission rate for data selection is set (S230 and S270).

Preferably, the network selection unit 110, for example, the data rate of the previously confirmed 3G network is' 1M ', the data rate of the WiFi network is' 3M', the difference between the transmission latency of the 3G network and WiFi network ' 80 msec '; If the data transmission rate of the currently confirmed 3G network is '0.95M', the data transmission rate of the WiFi network is '3M', and the difference in the transmission latency between the 3G network and the WiFi network is '150msec', Although the transmission latency difference increased from the previous value, since the data rate change of the 3G network is insignificant, as described above, the transmission rate for partial data selection for each access network is set according to the predetermined network selection policy.

Next, the partial data is selected corresponding to the transmission target network selected as described above (S280).

Preferably, the control unit 120 receives the transmission target data from the external device 500, so that each partial data divided from the transmission target data can be transmitted through the selected transmission target network (the first network device ( In addition to selecting the first partial data to be transmitted to 200, the second partial data to be transmitted to the second network device 300 is selected from the remaining partial data. On the other hand, if the difference in the transmission latency between the 3G network and the WiFi network does not exceed the threshold, or the difference in the data rate of each of the 3G network and the WiFi network does not exceed the threshold when the difference in the transmission latency exceeds the threshold, Based on the set data transmission rate for each network, the partial data divided from the transmission target data for each access network are selected. That is, the controller 120 receives the transmission target data from the external device 500, and transmits the first transmission rate for data transmission to the first network device 200 and the second data transmission for the second network device 300. Check the transmission rate, select the first partial data to be transmitted to the first network device 200 of the divided partial data in the transmission target data based on the confirmed transmission rate, and the second network device ( The second partial data to be transmitted to 300 is selected.

Thereafter, the selected partial data is transmitted using the corresponding network (S290).

Preferably, the communication unit 130 transmits the partial data selected corresponding to the transmission target network, that is, the first partial data to the first network apparatus 200 located in the 3G network, and then to the first network apparatus 200. Transmits the first partial data to the terminal device 400 as a receiving device. In addition, the communication unit 130 transmits the second partial data to the second network apparatus 300, and causes the second network apparatus 300 to transmit the second partial data to the terminal apparatus 400 as a receiving apparatus.

As described above, according to the heterogeneous network-based simultaneous data transmission service method according to the present invention, a difference in transmission latency between access networks required for data transmission in a heterogeneous network environment may exceed a threshold. In this case, by selecting a transmission target network based on transmission latency of each access network and selectively transmitting partial data through the selected transmission target network, data quality of service can be improved by efficiently transferring data traffic for each access network. It can improve the network stability.

Meanwhile, the heterogeneous network-based simultaneous data transmission service method according to an embodiment of the present invention may be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

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

According to the heterogeneous network-based simultaneous data transmission service system and method thereof according to the present invention, when the difference in transmission latency between access networks required for data transmission in a heterogeneous network environment exceeds a threshold, the access is performed. In order to select a transmission target network based on transmission latency of each network and to selectively transmit partial data through the selected transmission target network, it is not only used for related technologies as it overcomes the limitations of the existing technology. It is an industrially applicable invention because it is not only commercially available or commercially viable, but also practically viable.

100: management device
110: network selection 120: control unit
130:
200: first network device
300: second network device
400: terminal device
500: External device

Claims (9)

Check the difference in transmission latency required for data transmission between access networks, and if the identified difference in transmission latency exceeds a threshold, the arrangement order according to the magnitude of the multiple of the transmission latency calculated for each access network Network selection for selecting a transmission target network based on the network;
A control unit for selecting and providing partial data corresponding to the selected transmission target network; And
And a communication unit for transmitting the provided partial data for each access network. The method of claim 1,
The network preselection,
Calculating a multiple value for the transmission latency for each access network, and sequentially arranging the calculated multiple values of each access network according to the size, and accessing networks corresponding to each multiple value according to the arrangement order of the multiple values A transmission device, characterized in that selected as the transmission target network. The method of claim 1,
The network preselection,
If the difference in the transmission latency exceeds a threshold, the transmission target network is selected based on the arrangement order according to the magnitude of the multiple value,
And when the difference in the transmission standby time does not exceed a threshold, selecting the transmission target network according to a network selection policy for selecting partial data for each access network. The method of claim 1,
The network preselection,
When the difference in the data transmission rate for each access network exceeds the threshold when the difference in the transmission latency between the access networks exceeds the threshold, selecting the transmission target network based on the arrangement order according to the magnitude of the multiple value. Transmitter characterized in that. A transmission waiting time checking step of the transmission apparatus checking a difference in transmission waiting time required for data transmission between access networks;
When the transmitter determines the difference between the identified transmission wait times exceeds a threshold, the transmitter calculates a multiple value for the transmission wait time for each access network and sequentially arranges the calculated multiples of the access networks according to the size. Arrangement step;
A network selection step of the transmission apparatus selecting an access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values;
A data transmission step of the transmission apparatus selecting partial data corresponding to the selected transmission target network and transmitting the partial data to the reception apparatus; And
And a data receiving step of recovering the transmission target data by combining the partial data received for each access network by the receiving apparatus. A transmission waiting time checking step of checking a difference in transmission waiting time required for data transmission between access networks;
A network selecting step of selecting a transmission target network based on an arrangement order according to a magnitude of a multiple of a transmission waiting time calculated for each access network, when the identified difference in transmission waiting time exceeds a threshold;
A data selection step of selecting and providing partial data corresponding to the selected transmission target network; And
And a data transmission step of transmitting the provided partial data for each access network. The method according to claim 6,
The network selection step,
A multiplier value arranging step of calculating a multiplier value for transmission latency for each access network and sequentially arranging the calculated multiplier values of each access network according to a size; And
And a network selection step of selecting an access network corresponding to each multiple value as the transmission target network according to the arrangement order of the multiple values. The method according to claim 6,
The network selection step,
If the difference in the transmission latency exceeds a threshold, the transmission target network is selected based on the arrangement order according to the magnitude of the multiple value,
And when the difference in the transmission standby time does not exceed a threshold, selecting the transmission target network according to a network selection policy for selecting partial data for each access network. The method of claim 7, wherein
The network selection step,
When the difference in the data transmission rate for each access network exceeds the threshold when the difference in the transmission latency between the access networks exceeds the threshold, selecting the transmission target network based on the arrangement order according to the magnitude of the multiple value. Method of operation of a transmitting device, characterized in that.

Images