KR20130093986A - Apparatus for simultaneously transmitting data in heterogeneous network - Google Patents

Apparatus for simultaneously transmitting data in heterogeneous network Download PDF

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Publication number
KR20130093986A
KR20130093986A KR1020120015278A KR20120015278A KR20130093986A KR 20130093986 A KR20130093986 A KR 20130093986A KR 1020120015278 A KR1020120015278 A KR 1020120015278A KR 20120015278 A KR20120015278 A KR 20120015278A KR 20130093986 A KR20130093986 A KR 20130093986A
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South Korea
Prior art keywords
partial data
received
transmission
order information
data
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KR1020120015278A
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Korean (ko)
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KR101437371B1 (en
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김지훈
정인장
전진수
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에스케이텔레콤 주식회사
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Priority to KR1020120015278A priority Critical patent/KR101437371B1/en
Priority to PCT/KR2013/000150 priority patent/WO2013122325A1/en
Publication of KR20130093986A publication Critical patent/KR20130093986A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1835—Buffer management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1829—Arrangements specially adapted for the receiver end
    • H04L1/1854—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Computer Security & Cryptography (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

PURPOSE: An apparatus for supporting the heterogeneous network based data simultaneous transmission service is provided to reduce the realigning waiting time which is unnecessary in a receiver device, thereby enabling a quick request for the retransmission of the partial data which is not received. CONSTITUTION: A control unit (130) confirms the partial data having the transmission order information after the transmission order information of the partial data which is not received, in correspondence to the partial data received through more than two connection networks. If the partial data received from the front part of more than two connection networks is included in the confirmed partial data, the control unit determines the not received partial data as being lost. The control unit requests the retransmission of the not received partial data. [Reference numerals] (110) Communication unit; (120) Buffer unit; (130) Control unit

Description

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

The present invention relates to a data concurrent transmission service method and, more particularly, to a simultaneous data transmission service method in which, in an environment providing simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks, When the partial data having the transmission sequence information after the partial data not received based on the transmission sequence information is received for each of the heterogeneous networks, the partial data not received is immediately determined to be lost, Layer data synchronous transmission / reception apparatus and transmission / reception apparatus capable of improving the transmission performance of the simultaneous transmission service because it is possible to quickly request the retransmission of the unreceived partial data by reducing unnecessary reordering latency time in the receiving- How about All.

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.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide an apparatus and method for providing a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks, If the partial data having the transmission sequence information after the partial data not received based on the transmission sequence information of each partial data is received for each of the heterogeneous networks, the partial data not received is immediately determined to be lost, It is possible to transmit the data to the upper layer without waiting for transmission of the partial data of the transmission sequence information to the upper layer without waiting for the transmission. As a result, it is possible to quickly request the retransmission of the partial data that has not been received, To improve the transmission performance of the service There is.

According to a first aspect of the present invention, there is provided a heterogeneous network-based data concurrent transmission / reception apparatus including: a communication unit for receiving partial data segmented from data to be transmitted through two or more access networks; The partial data having the transmission order information subsequent to the transmission order information of the non-received partial data corresponding to each piece of partial data received through the two or more access networks, If the received partial data is included, determines that the non-received partial data is lost and requests retransmission of the non-received partial data.

Preferably, the control unit confirms the access network in which the partial data having the transmission order information subsequent to the transmission order information of the non-received partial data is received from the partial data to be verified, Received partial data is received from all of the access networks other than the access network, it is determined that the non-received partial data is lost and a retransmission of the non-received partial data may be requested.

Preferably, the control unit transmits a reception response including a retransmission request for the non-received partial data corresponding to each of the partial data included in the partial data to be checked, if the non-received partial data is judged to be lost .

According to a second aspect of the present invention, there is provided a method for simultaneously transmitting and receiving heterogeneous network-based data, comprising: receiving partial data segmented from data to be transmitted through two or more access networks; A partial data confirming step of confirming partial data having transmission order information after transmission order information of unreceived partial data corresponding to each partial data received through the two or more access networks; And a retransmission request step of, if the partial data received includes partial data received from all of the two or more access networks, determining that the partial data not received is lost and requesting retransmission of the partial data not received .

Wherein the retransmission request step identifies the access network in which the partial data having the transmission order information after the transmission order information of the non-received partial data is received in the partial data to be verified, If the partial data is received from all of the access networks other than the network, the non-received partial data is judged to be lost and the retransmission of the non-received partial data may be requested.

Preferably, the retransmission request step may transmit a reception response including a retransmission request for the non-received partial data corresponding to each partial data contained in the partial data to be verified.

According to the heterogeneous network-based data concurrent transmission / reception apparatus and transmission / reception method of the present invention, in an environment for providing a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks, If the partial data having the transmission order information after the partial data not received based on the respective transmission order information is received for each of the heterogeneous networks, it determines that the partial data not received is immediately lost, and then transmits the partial data of the transmission order information It is possible to reduce the unnecessary reallocation waiting time in the receiving-side apparatus and to quickly request the retransmission of the non-received partial data, thereby improving the transmission performance of the simultaneous transmission service.

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 illustrating a configuration of a heterogeneous network-based data concurrent transmission / reception apparatus according to a preferred embodiment of the present invention.
3 is a flowchart illustrating an operation flow in a heterogeneous network-based data concurrent transmission system according to a preferred embodiment of the present invention.
FIG. 4 is a flowchart illustrating a method of transmitting and receiving a heterogeneous network-based data concurrently 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, i.e., heterogeneous networks, may include WCDMA, CDMA, WiBro, WLAN (WiFi) and Long Term Evolution (LTE).

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 data concurrent transmission system according to the present invention includes an external device 500 that receives data combined / restored according to a simultaneous transmission service from the management device 400, and a policy management device (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.

Therefore, since the simultaneous transmission service provided by the present invention simultaneously transmits partial data segmented from one data using a plurality of heterogeneous networks (e.g., 3G and WiFi), a plurality of heterogeneous It is very important to restore partial data to be transmitted by receiving partial data received through a network (e.g., 3G and WiFi) without loss or loss and combining the partial data according to the dividing order.

However, there is a difference between the latency of each network because the network quality (throughput, delay, loss, etc.) between each network is different from each other and the network state of each network is variable in real time. Therefore, even if each piece of partial data is simultaneously transmitted using a plurality of heterogeneous networks (e.g., 3G and WiFi), each actual network (e.g., 3G and WiFi) is transmitted from the terminal device 100 There is a difference in the reception time point of the partial data received through the communication network.

On the other hand, according to the TCP retransmission rule, as the duplicate ACK (Dupack) is received a certain number of times (for example, three times) from the receiving-side apparatus receiving the data (partial data packet), the corresponding data (partial data packet) And there is a redundant ACK based retransmission operation for retransmitting.

Therefore, in consideration of the difference in the reception time points of the partial data received through the respective networks due to the difference in transmission delays of the respective networks, the reception-side terminal device 100 transmits the partial data The partial data in the order of the first received data is queued for a predetermined waiting time and the waiting time of the waiting data is elapsed. If partial data that has not yet been received is not received yet, partial data in the order of the received data is transmitted to the upper layer, thereby preventing unnecessary redundant ACKs for the non-received partial data to be delayed.

However, due to the partial data reordering and the waiting for delivery in the receiving-side terminal device 100, a specific retransmission time-out (RTO: Retransmission Time-Out (RTO) ) Retransmission time-out-based retransmission operation may occur that retransmits the corresponding data (partial data packet) as time elapses.

Accordingly, in the present invention, when partial data having transmission order information after partial data not received based on transmission order information of partial data received in an environment providing simultaneous transmission service is received for each of heterogeneous networks, It is determined that the data is immediately lost and then transmitted to the upper layer without waiting for transmission of the partial data of the transmission order information. As a result, an unnecessary reordering waiting time in the receiving-side apparatus can be effectively reduced.

The management apparatus 400 as a transmitting side apparatus or a simultaneous transmission apparatus based on a heterogeneous network transmits the transmission target data to be transmitted from the external apparatus 500 to the terminal apparatus 100 When received, it is divided into partial data.

Then, the management apparatus 400 selects each divided partial data for each connection network based on the predetermined data transmission ratio for each connection network.

That is, when the management apparatus 400 receives the transmission target data to be transmitted from the external apparatus 500 to the terminal apparatus 100, the management apparatus 400 divides the transmission target data into partial data and transmits the data transmission rate (for example, WiFi and 3G) That is, a first transmission rate for data transmission to the first network device 200 and a second transmission rate for data transmission to the second network device 300, Selects the first partial data to be transmitted to the first network device 200 among the partial data and selects the second partial data to be transmitted to the second network device 300 among the remaining partial data.

At this time, it is preferable that the management apparatus 400 combines the partial data divided from the transmission target data and adds / inserts the division order information to each partial data so that the original transmission target data can be restored.

Then, the management apparatus 400 transmits each partial data selected for each access network (e.g., WiFi and 3G) through each access network (e.g., WiFi and 3G) The second network device 300 transmits the first partial data transmitted from the management device 400 to the terminal device 100 and the second network device 300 transmits the second partial data transmitted from the management device 400 to the terminal device 100 .

At this time, the management apparatus 400 adds / inserts the transmission order information according to the transmission order to each of the partial data to be transmitted through the respective access networks (e.g., WiFi and 3G) and transmits the same.

For example, the management apparatus 400 may transmit / receive the transmission order information 1, 2 to the first and second partial data to be transmitted to the first network, i.e., the 3G network, and transmit the same to the second network, i.e., the WiFi network Transmits / inserts the transmission order information 3 to the third partial data, and transmits / inserts the transmission order information 4, 5, and 6 to the fourth, fifth, and sixth partial data to be transmitted to the 3G network, The transmission order information 7 may be assigned / inserted to the seventh partial data to be transmitted.

At this time, the transmission order information and the division order information described above to be given / inserted to each partial data may be the same or different from each other.

Accordingly, the terminal device 100 can restore the transmission object data by combining the partial data received through two or more networks based on the division order information.

More specifically, the terminal device 100 receives the first partial data from the first network device 200 via two or more access networks (e.g., WiFi, 3G) and transmits the second partial data to the second network device 200 (300).

Accordingly, the terminal device 100 recognizes the partial data having the same identification information (e.g., virtual IP) indicating division from one piece of data based on the identification information (e.g., virtual IP) included in the received partial data And rearrange them based on the transmission order information included in the partial data.

Accordingly, the terminal apparatus 100 confirms the partial data having the transmission order information subsequent to the transmission order information of the non-received partial data, corresponding to each partial data received through two or more access networks (e.g., 3G, WiFi) do.

Then, the terminal apparatus 100 includes partial data received from all of two or more access networks (e.g., 3G, WiFi) in the partial data confirmed to have the transmission order information subsequent to the transmission order information of the partial data not received The non-received partial data is immediately judged as the lost data, and the non-received partial data is requested to be retransmitted.

For example, the case where the partial data of the transmission order information 5 among partial data of the transmission order information 1, 2, 3, 4, 5, 6, 7 is lost will be described.

The terminal device 100 receives the partial data of the transmission order information 1 and 2 over the 3G network, receives the partial data of the transmission order information 3 via the WiFi network, and receives the partial data of the transmission order information 4 via the 3G network , The partial data received through two or more access networks (e.g., 3G, WiFi) can be rearranged in the order of transmission order information 1, 2, and 3 based on the transmission order information.

Then, according to the result of rearrangement of the partial data, the terminal apparatus 100 transmits the partial data of the transmission order information 1, 2, 3, and 4 normally received without partial data of the previous transmission order information that has not been received, To the functional unit (the control unit 130 of FIG. 2) that performs the reception response transmission and partial data combination according to TCP.

Accordingly, the terminal apparatus 100 transmits a reception response indicating that the partial data of the transmission order information 1, 2, 3, 4 is normally received corresponding to the partial data of the transmission order information 1, 2, And provides it to the external device 500 through the transmission device, that is, the management device 400.

On the other hand, if the partial data of the transmission order information 5 is lost as in the above-mentioned example, the partial data of the transmission order information 6, which is transmitted later through the first network, that is, the 3G network through which the partial data of the transmission order information 5 is transmitted, And the partial data of the transmission order information 7 transmitted later through the second network or WiFi network, regardless of the state of the 3G network, will be received by the terminal device 100. [

Accordingly, the terminal apparatus 100 can confirm the partial data having the transmission order information 6, 7 after the partial data of the previous transmission order information 5 which has not been received, according to the result of rearrangement of the partial data.

In this case, the terminal apparatus 100 transmits the partial data received from all of the two or more access networks (e.g., 3G, WiFi) to the partial data that is confirmed to have the transmission order information after the transmission order information 5 of the non-received partial data The partial data of the transmission order information 6 received via the 3G network and the partial data of the transmission order information 7 received via the WiFi network for each of two or more access networks (e.g., 3G, WiFi) As shown in FIG.

If one or more pieces of partial data having transmission sequence information subsequent to the partial data of the non-received transmission sequence information 5 are received in each of two or more access networks (e.g., 3G, WiFi) Partial data of the transmission sequence information 5 that has not been received since partial data of the subsequent transmission sequence information has already been received even if the partial data is received via any of the two or more access networks (e.g., 3G, WiFi) It is due to the conviction that it is not.

At this time, the terminal apparatus 100 identifies the access network on which the partial data having the transmission order information after the transmission order information of the non-received partial data is received from the partial data to be verified, When partial data is received from all access networks other than the access network, it is determined that the non-received partial data is lost and a retransmission of the non-received partial data is requested.

That is, when the terminal device 100 determines that the partial data of the non-received transmission order information (e.g., 5) is lost, the terminal device 100 confirms that the partial data has the transmission order information after the transmission order information 5 of the non-received partial data In the partial data, 3G is confirmed on the access network in which the partial data having the subsequent transmission order information (e.g., 6) is received, and the access network other than the confirmed 3G access network, i.e., For example, if the partial data is received, the non-received partial data may be judged to be lost and the retransmission of the partial data not received may be requested.

Accordingly, when the terminal device 100 determines that the partial data of the transmission order information 5 not received as described above is lost, the terminal device 100 immediately requests retransmission of the partial data of the non-received transmission order information 5.

More specifically, if the partial data of the transmission order information 5 that has not been received is judged to be lost as described above, the terminal apparatus 100 transmits, to the partial data of the transmission order information 6, 7 after the partial data of the transmission order information 5 determined to be lost (The controller 130 in FIG. 2) that performs reception response transmission and partial data combining according to an upper layer, that is, TCP.

Accordingly, when partial data of the transmission order information 5 is not received and the partial data of the transmission order information 6 and 7 are transmitted to the upper layer, the terminal apparatus 100 transmits the partial data of the transmission order information 6, For example, a duplicate acknowledgment including a retransmission request for partial data of the non-received transmission order information 5, and provides the duplicated acknowledgment to the external device 500 through the transmission device, i.e., the management device 400. [

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, the simultaneous transmission service to which the present invention is applied is configured such that the terminal device 100 transmits the partial data obtained by dividing the transmission object data to the management apparatus 400 on the uplink, and the management apparatus 400 rearranges the partial data, The terminal device 100 as the transmitting apparatus can perform the partial data division, the transmission order information grant / insertion, and the partial data transmission described above performed by the management apparatus 400 as the transmitting apparatus in the downlink And checks the partial data having the transmission order information after the transmission order information of the above-described non-received partial data performed by the terminal apparatus 100 as the receiving apparatus at the time of the downlink, and confirms the loss judgment and the retransmission request for the non- And the management apparatus 400 as a receiving apparatus at the time of linking can perform this.

Hereinafter, the configuration of the heterogeneous network-based data concurrent transmission / reception apparatus, that is, the reception-side apparatus according to the present invention will be described in more detail with reference to FIG. 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 concurrent transmission / reception device 100 according to the preferred embodiment of the present invention includes a communication unit 110 that receives partial data segmented from transmission target data through two or more access networks, Receiving partial data having transmission order information subsequent to the transmission order information of the non-received partial data corresponding to each piece of partial data received through the access network described above, And a control unit 130 for determining that the partial data is missing if the partial data is included and requesting retransmission of the partial data not received.

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 can receive a plurality of partial data segments divided from the transmission object data from the above-described management apparatus 400 through two or more access networks (e.g., 3G, WiFi).

In a more specific embodiment, the heterogeneous network-based data concurrent transmission / reception apparatus or receiving apparatus 100 according to the preferred embodiment of the present invention includes a buffer unit 120 (shown in FIG. 1) for rearranging partial data received through the two or more access networks, ).

The buffer unit 120 identifies the partial data having the transmission order information after the transmission order information of the non-received partial data corresponding to each piece of partial data received through the two or more access networks.

More specifically, the buffer unit 120 identifies the same identification information (e.g., virtual ID) indicating division from one piece of data based on identification information (e.g., virtual IP) included in various partial data received through the communication unit 110 : Virtual IP), and rearrange them based on the transmission order information included in the partial data.

In response to each piece of partial data received via two or more access networks (for example, 3G, WiFi), the buffer unit 120 confirms partial data having transmission sequence information subsequent to the transmission sequence information of unreceived partial data do.

For example, the case where the partial data of the transmission order information 5 among partial data of the transmission order information 1, 2, 3, 4, 5, 6, 7 is lost will be described.

The buffer unit 120 receives the partial data of the transmission order information 1 and 2 over the 3G network, receives the partial data of the transmission order information 3 via the WiFi network, and receives the partial data of the transmission order information 4 via the 3G network , The partial data received through two or more access networks (e.g., 3G, WiFi) can be rearranged in the order of transmission order information 1, 2, and 3 based on the transmission order information.

According to the result of rearrangement of the partial data, the buffer unit 120 stores the partial data of the transmission order information 1, 2, 3, and 4 normally received without partial data of the previous transmission order information that has not been received, To the control unit 130.

Accordingly, the control unit 130 determines whether the partial data of the transmission order information 1, 2, 3, 4 is transmitted / received from the buffer unit 120, A reception response indicating that the reception is normally performed, and provides the reception response to the external device 500 through the transmission apparatus, that is, the management apparatus 400. [

On the other hand, if the partial data of the transmission order information 5 is lost as in the above-mentioned example, the partial data of the transmission order information 6, which is transmitted later on the first network through which the partial data of the transmission order information 5 is transmitted, And the partial data of the transmission sequence information 7 transmitted later through the second network or WiFi network, regardless of the state of the 3G network, will be received by the receiving apparatus 100. [

Accordingly, the buffer unit 120 can confirm the partial data having the transmission order information 6, 7 after the partial data of the previous transmission order information 5 that has not been received, according to the result of rearrangement of the partial data.

For example, assuming that the partial data of the transmission order information 6 is received first and then the partial data of the transmission order information 7 is received in the receiving apparatus 100, the buffer unit 120 determines that the partial data of the transmission order information 6 is received The partial data of the transmission sequence information 6 after the partial data of the previous transmission sequence information 5 which has not been received and the partial data of the previous transmission sequence information 5 which is not received are not transmitted to the control unit 130 And when the partial data of the transmission order information 7 is received, the partial data of the transmission order information 7 after the partial data of the previous transmission order information 5 which has not been received is checked, and since there is partial data of the previous transmission order information 5 which is not received, The control unit 130 does not transmit the partial data.

Here, if the buffer unit 120 includes one or more pieces of partial data received for each of the two or more access networks, the control unit 130 determines that the partial data not received is a lost data, Request retransmission of partial data.

More specifically, the control unit 130 confirms partial data having the transmission order information 6,7 after the partial data of the previous transmission order information 5 not received in the buffer unit 120 as described above, Partial data of the transmission order information 6 received via the 3G network, and partial data of the transmission order information 7 received via the WiFi network, to the partial data of two or more access networks (e.g., 3G, WiFi) The partial data of the non-received transmission order information 5 is immediately judged as the lost data.

If one or more pieces of partial data having transmission sequence information subsequent to the partial data of the non-received transmission sequence information 5 are received in each of two or more access networks (e.g., 3G, WiFi) Partial data of the transmission sequence information 5 that has not been received since partial data of the subsequent transmission sequence information has already been received even if the partial data is received via any of the two or more access networks (e.g., 3G, WiFi) It is due to the conviction that it is not.

At this time, the controller 130 identifies the access network in which the partial data having the transmission order information after the transmission order information of the non-received partial data is received from the partial data to be verified, When partial data is received from all of the access networks other than the access network, it is preferable to determine that the partial data not received has been lost and request retransmission of the partial data not received.

That is, at the time when the partial data of the non-received transmission order information (for example, 5) is judged as the lost data, the control unit 130 judges whether or not the part confirmed to have the transmission order information after the transmission order information 5 of the non- In the data, 3G is confirmed on the access network in which the partial data having the subsequent transmission order information (e.g., 6) is received, and the access network other than the confirmed 3G access network, i.e., : 7), the non-received partial data is judged to be lost, and the non-received partial data may be requested to be retransmitted.

Accordingly, if the partial data of the transmission order information 5 that has not been received is judged to be lost, the control unit 130 can immediately request retransmission of the partial data of the non-received transmission order information 5.

More specifically, when the controller 130 determines that the non-received partial data is lost, the control unit 130 determines whether the partial data included in the received partial data is a received data including a retransmission request for the non- By transmitting a response, it is possible to request retransmission of partial data of the transmission sequence information that has not been received.

That is, if the partial data of the transmission order information 5 that has not been received is judged to be lost as in the above example, the control unit 130 transmits the partial order data of the transmission order information 5 determined to be lost in the buffer unit 120, 7 to the upper layer, that is, the control unit 130, as shown in FIG. Of course, this transfer operation may be performed independently or in the buffer unit 120.

In response to partial data of the transmission order information 6 and 7 being transferred / received in a state where the partial data of the transmission order information 5 is not received, the control unit 130 determines whether or not the partial data of the transmission order information 6, For example, a Dup Ack including a retransmission request for the partial data of the transmission order information 5, and provides it to the external device 500 via the transmission device, i.e., the management device 400. [

Accordingly, the transmitting apparatus, that is, the transmitting apparatus 400 or the external apparatus 500, transmits the corresponding data (for example, the transmission data) as the duplicate ACK (Dupack) is received from the transmitting apparatus 100 a certain number of times The partial data of the order information 5) is lost during transmission and can be resent.

On the other hand, if only the partial data having the transmission order information 6 or 7 after partial data of the previous transmission order information 5 not received in the buffer unit 120 is confirmed, The partial data having the transmission order information 6 or 7 in the buffer unit 120 is transmitted to the control unit (not shown) in the buffer unit 120 without judging that the partial data of the non-received transmission order information 5 is lost, 130).

In this case, the buffer unit 120 stores the partial data (for example, the partial data having the transmission order information 6 or 7) having the transmission order information after the partial data of the previous transmission order information 5 that has not been received, 3G, WiFi), if the specific waiting time elapses, partial data having the transmission order information 6 or 7 will be transmitted to the upper layer, that is, the controller 130.

In response to partial data of the transmission sequence information 6 or 7, the control unit 130 determines that the partial data of the transmission sequence information 6 or 7 is not received, For example, a duplicate acknowledgment including a retransmission request for the partial data of the transmission order information 5 to the external device 500 through the transmission device, that is, the management device 400. [

The control unit 130 may combine the partial data transmitted / received from the buffer unit 120 according to the division order information to restore the original transmission target data.

As described above, according to the heterogeneous network-based data concurrent transmission / reception apparatus according to the present invention, in an environment providing simultaneous transmission service for transmitting / receiving partial data segmented by data using a plurality of heterogeneous networks, If the partial data having the transmission sequence information after the partial data not received based on the transmission sequence information of each partial data is received for each of the heterogeneous networks, the partial data not received is immediately determined to be lost, As a result, unnecessary reordering wait time is reduced in the receiving-side apparatus, and the retransmission of the non-received partial data can be promptly requested, thereby improving the transmission performance of the simultaneous transmission service.

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

The management apparatus 400 receives the transfer target data to be transferred from the external apparatus 500 to the terminal apparatus 100 and divides the transfer target data into partial data, Each piece of partial data is selected for each access network (S10).

That is, when the management apparatus 400 receives the transmission target data to be transmitted from the external apparatus 500 to the terminal apparatus 100, the management apparatus 400 divides the transmission target data into partial data and transmits the data transmission rate (for example, WiFi and 3G) That is, a first transmission rate for data transmission to the first network device 200 and a second transmission rate for data transmission to the second network device 300, Selects the first partial data to be transmitted to the first network device 200 among the partial data and selects the second partial data to be transmitted to the second network device 300 among the remaining partial data.

At this time, it is preferable that the management apparatus 400 combines the partial data divided from the transmission target data and adds / inserts the division order information to each partial data so that the original transmission target data can be restored.

Then, the management apparatus 400 transmits each partial data selected for each access network (e.g., WiFi and 3G) through each access network (e.g., WiFi and 3G) The second network device 300 transmits the second partial data transmitted from the management device 400 to the terminal device 100 by transmitting the first partial data transmitted from the management device 400 to the terminal device 100 (S25).

At this time, the management apparatus 400 adds / inserts the transmission order information in accordance with the transmission order to each of the partial data to be transmitted through each of the access networks (e.g., WiFi and 3G) in step S10.

For example, the management apparatus 400 may transmit / receive the transmission order information 1, 2 to the first and second partial data to be transmitted to the first network, i.e., the 3G network, and transmit the same to the second network, i.e., the WiFi network Transmits / inserts the transmission order information 3 to the third partial data, and transmits / inserts the transmission order information 4, 5, and 6 to the fourth, fifth, and sixth partial data to be transmitted to the 3G network, The transmission order information 7 may be assigned / inserted to the seventh partial data to be transmitted.

At this time, the transmission order information and the division order information described above to be given / inserted to each partial data may be the same or different from each other.

Accordingly, the terminal device 100 can restore the transmission object data by combining the partial data received through two or more networks based on the division order information.

More specifically, the terminal device 100 receives the first partial data from the first network device 200 via two or more access networks (e.g., WiFi, 3G) and transmits the second partial data to the second network device 200 (300).

Accordingly, the terminal device 100 recognizes the partial data having the same identification information (e.g., virtual IP) indicating division from one piece of data based on the identification information (e.g., virtual IP) included in the received partial data , And rearranges them based on the transmission order information included in the partial data (S30).

Accordingly, the terminal apparatus 100 confirms the partial data having the transmission order information subsequent to the transmission order information of the non-received partial data, corresponding to each partial data received through two or more access networks (e.g., 3G, WiFi) (S50).

Then, the terminal device 100 transmits one or more partial data received for each of the two or more access networks (e.g., 3G, WiFi) to the partial data that is confirmed to have the transmission order information subsequent to the transmission order information of the partial data that has not been received If it is included, the non-received partial data is immediately judged as a lost data, and a retransmission request for the non-received partial data is requested.

For example, the case where the partial data of the transmission order information 5 among partial data of the transmission order information 1, 2, 3, 4, 5, 6, 7 is lost will be described.

The terminal device 100 receives the partial data of the transmission order information 1 and 2 over the 3G network, receives the partial data of the transmission order information 3 via the WiFi network, and receives the partial data of the transmission order information 4 via the 3G network The partial data received through two or more access networks (e.g., 3G, WiFi) can be rearranged in the order of transmission order information 1, 2, and 3 based on the transmission order information (S30).

Then, according to the result of rearrangement of the partial data, the terminal apparatus 100 transmits the partial data of the transmission order information 1, 2, 3, and 4 normally received without partial data of the previous transmission order information that has not been received, To the upper layer that performs the reception response transmission and the partial data combining according to TCP.

Accordingly, the terminal apparatus 100 transmits a reception response indicating that the partial data of the transmission order information 1, 2, 3, 4 is normally received corresponding to the partial data of the transmission order information 1, 2, And provides it to the external device 500 through the transmission device, that is, the management device 400 (S40).

On the other hand, if the partial data of the transmission order information 5 is lost as in the above-mentioned example, the partial data of the transmission order information 6, which is transmitted later through the first network, that is, the 3G network through which the partial data of the transmission order information 5 is transmitted, And the partial data of the transmission order information 7 transmitted later through the second network or WiFi network, regardless of the state of the 3G network, will be received by the terminal device 100. [

Accordingly, the terminal device 100 can confirm the partial data having the transmission order information 6,7 after the partial data of the previous transmission order information 5 which has not been received, according to the result of rearrangement of the partial data (S50).

In this case, the terminal device 100 transmits to the partial data that has been confirmed to have the transmission order information after the transmission order information 5 of the non-received partial data, at least one part received by two or more access networks (e.g., 3G, WiFi) Since the partial data of the transmission order information 6 received via the 3G network and the partial data of the transmission order information 7 received via the WiFi network are included (S60), the partial data of the non-received transmission order information 5 is immediately judged as the loss .

If one or more pieces of partial data having transmission sequence information subsequent to the partial data of the non-received transmission sequence information 5 are received in each of two or more access networks (e.g., 3G, WiFi) Partial data of the transmission sequence information 5 that has not been received since partial data of the subsequent transmission sequence information has already been received even if the partial data is received via any of the two or more access networks (e.g., 3G, WiFi) It is due to the conviction that it is not.

At this time, the terminal apparatus 100 identifies the access network on which the partial data having the transmission order information after the transmission order information of the non-received partial data is received from the partial data to be verified, When partial data is received from all access networks other than the access network, it is determined that the non-received partial data is lost and a retransmission of the non-received partial data is requested.

That is, when the terminal device 100 determines that the partial data of the non-received transmission order information (e.g., 5) is lost, the terminal device 100 confirms that the partial data has the transmission order information after the transmission order information 5 of the non-received partial data In the partial data, 3G is confirmed on the access network in which the partial data having the subsequent transmission order information (e.g., 6) is received, and the access network other than the confirmed 3G access network, i.e., For example, if the partial data is received, the non-received partial data may be judged to be lost and the retransmission of the partial data not received may be requested.

Accordingly, when the terminal device 100 determines that the partial data of the transmission order information 5 not received as described above is lost, the terminal device 100 immediately requests retransmission of the partial data of the non-received transmission order information 5.

More specifically, if the partial data of the transmission order information 5 that has not been received is judged to be lost as described above, the terminal apparatus 100 transmits, to the partial data of the transmission order information 6, 7 after the partial data of the transmission order information 5 determined to be lost To the upper layer performing the reception response transmission and the partial data combining according to the upper layer, that is, TCP.

Accordingly, when partial data of the transmission order information 5 is not received and the partial data of the transmission order information 6 and 7 are transmitted to the upper layer, the terminal apparatus 100 transmits the partial data of the transmission order information 6, For example, a DupAck including a retransmission request for partial data of the non-received transmission order information 5 (S70), and provides the received response to the external device 500 via the transmission device, i.e., the management device 400. [

Hereinafter, a heterogeneous network-based data concurrent transmission / reception method according to the present invention, that is, a method of operating a receiving apparatus will be described with reference to FIG.

The heterogeneous network-based data concurrent transmission / reception method according to the present invention can receive a plurality of partial data segmented from transmission target data through two or more access networks (e.g., 3G, WiFi) (SlOO).

The heterogeneous network-based data concurrent transmission / reception method according to the present invention checks partial data having transmission sequence information subsequent to transmission sequence information of unreceived partial data corresponding to each partial data received through the two or more access networks .

More specifically, the heterogeneous network-based data concurrent transmission / reception method according to the present invention includes the steps of: (i) identifying the same identification information For example, virtual IP), and rearranges them based on the transmission order information included in the partial data (S110).

For example, the case where the partial data of the transmission order information 5 among partial data of the transmission order information 1, 2, 3, 4, 5, 6, 7 is lost will be described.

A method for transmitting and receiving data of a simultaneous network-based data concurrently according to the present invention is characterized in that partial data of transmission order information 1 and 2 is received through a 3G network, partial data of transmission order information 3 is received via a WiFi network, When partial data of information 4 is received, each partial data received through two or more access networks (e.g., 3G, WiFi) can be rearranged in the order of transmission order information 1, 2, 3 based on transmission order information .

According to another aspect of the present invention, there is provided a method for simultaneously transmitting and receiving heterogeneous network-based data, comprising: The partial data is transmitted to the upper layer (S120).

Accordingly, the heterogeneous network-based data concurrent transmission / reception method according to the present invention is a method for simultaneously transmitting / receiving data of the transmission order information 1, 2, 3, (S130). The received response is transmitted to the external device 500 through the transmitting device (i.e., the management device 400).

On the other hand, if the partial data of the transmission order information 5 is lost as in the above-mentioned example, the partial data of the transmission order information 6, which is transmitted later through the first network, that is, the 3G network on which the partial data of the transmission order information 5 is transmitted, The receiving device 100 will receive the partial data of the transmission order information 7 transmitted later via the second network or WiFi network regardless of the state of the 3G network.

Accordingly, in the heterogeneous network-based data concurrent transmission / reception method according to the present invention, partial data having transmission sequence information 6 and 7 after partial data of previous transmission sequence information 5 not received can be identified according to the result of rearrangement of partial data .

For example, assuming that the partial data of the transmission order information 6 is first received in the receiving apparatus 100 and then the partial data of the transmission order information 7 is received, the heterogeneous network-based data concurrent transmission / When the partial data of the order information 6 is received, partial data of the transmission sequence information 6 after the partial data of the previous transmission sequence information 5 not received is checked, and partial data of the previous transmission sequence information 5 which is not received is received. If the partial data of the transmission sequence information 7 is received, the partial data of the transmission sequence information 7 after the partial data of the previous transmission sequence information 5 not received is checked and the partial data of the previous transmission sequence information 5 not received The partial data of the transmission order information 7 will not be transferred to the upper layer but will wait (S140).

Here, the method of simultaneously transmitting and receiving data of a heterogeneous network-based data according to the present invention is characterized in that when the identified partial data includes at least one partial data received for each of the two or more access networks (S150) And requests retransmission of the unreceived partial data (S160, S170).

More specifically, in the heterogeneous network-based data concurrent transmission / reception method according to the present invention, partial data having transmission sequence information 6 and 7 after partial data of previous transmission sequence information 5 not received One or more pieces of partial data received for each of two or more access networks (e.g., 3G, WiFi) in the identified partial data, that is, partial data of the transmission sequence information 6 received through the 3G network and transmission sequence information 7 received via the WiFi network Since the partial data is included (S150), the partial data of the non-received transmission order information 5 is immediately judged as the lost data.

If one or more pieces of partial data having transmission sequence information subsequent to the partial data of the non-received transmission sequence information 5 are received in each of two or more access networks (e.g., 3G, WiFi) Partial data of the transmission sequence information 5 that has not been received since partial data of the subsequent transmission sequence information has already been received even if the partial data is received via any of the two or more access networks (e.g., 3G, WiFi) It is due to the conviction that it is not.

In this case, the heterogeneous network-based data concurrent transmission / reception method of the present invention checks the access network in which the partial data having the transmission order information after the transmission order information of the non-received partial data is received from the confirmed partial data, When partial data is received from all of the access networks other than the identified access network among the two or more access networks, it is preferable that the non-received partial data is judged to be lost and a retransmission of the not received partial data is requested.

That is, in the simultaneous network-based data transmission / reception method according to the present invention, at the time of determining that partial data of non-received transmission order information (e.g., 5) is lost, In the partial data confirmed to have the sequence information, 3G is confirmed on the access network in which the partial data having the following transmission order information (e.g., 6) is received, and the access network other than the confirmed 3G access network, If the partial data is received, the non-received partial data is judged to be lost, and the retransmission of the non-received partial data may be requested.

Accordingly, in the simultaneous network-based data concurrent transmission / reception method according to the present invention, when it is determined that the partial data of the transmission order information 5 not received as described above is lost, the user can immediately request retransmission of the partial data of the transmission / have.

More specifically, the heterogeneous network-based data concurrent transmission / reception method according to the present invention is a method for simultaneously transmitting / receiving data of a heterogeneous network based on data, wherein when it is determined that the unreceived partial data is lost, By requesting retransmission of partial data of the transmission sequence information that has not been received, by transmitting a reception response including a retransmission request for the transmission sequence information.

That is, in the simultaneous network-based data concurrent transmission / reception method according to the present invention, when partial data of the transmission / reception sequence information 5 that has not been received is determined to be lost as in the above example, 6 and 7 to the upper layer (S160).

Accordingly, in the simultaneous network-based data concurrent transmission / reception method according to the present invention, since the partial data of the transmission order information 5 is not received, partial data of the transmission order information 6 and 7 is transmitted / For example, Dup Ack including a retransmission request for partial data of the non-received transmission order information 5 corresponding to each of the partial data, and provides it to the external device 500 via the transmission device, that is, the management device 400 (S170).

Accordingly, the transmitting apparatus, that is, the transmitting apparatus 400 or the external apparatus 500, transmits the corresponding data (for example, the transmission data) as the duplicate ACK (Dupack) is received from the transmitting apparatus 100 a certain number of times The partial data of the order information 5) is lost during transmission and can be resent.

In the simultaneous network-based data concurrent transmission / reception method according to the present invention, if only the partial data having the transmission order information 6 or 7 after the partial data of the previous transmission order information 5 not received in step S150 is checked, The partial data having the transmission order information 6 or 7 is not judged as the lost data, and the partial data having the transmission order information 6 or 7 is transmitted to the upper layer Wait without delivering.

In this case, the heterogeneous network-based data concurrent transmission / reception method according to the present invention is characterized in that partial data (for example, partial data having transmission sequence information 6 or 7) having transmission sequence information after partial data of previous transmission sequence information 5 If at least one of the two or more access networks (e.g., 3G, WiFi) is not received and a specific waiting time has elapsed (S180), partial data having transmission order information 6 or 7 will be transmitted to the upper layer.

Accordingly, in the simultaneous network-based data concurrent transmission / reception method according to the present invention, the partial data of the transmission order information 6 and 7 are transmitted / received in a state where partial data of the transmission order information 5 is not received, corresponding to steps S160 and S170 described above, For example, DupAck including a retransmission request for the partial data of the non-received transmission order information 5 corresponding to the partial data of the transmission order information 6 or 7, To the external device 500 via the network.

As described above, according to the heterogeneous network-based data concurrent transmission / reception method of the present invention, in an environment for providing simultaneous transmission service for transmitting / receiving partial data segmented by data using a plurality of heterogeneous networks, If the partial data having the transmission sequence information after the partial data not received based on the transmission sequence information of each partial data is received for each of the heterogeneous networks, the partial data not received is immediately determined to be lost, As a result, unnecessary reordering wait time is reduced in the receiving-side apparatus, and the retransmission of the non-received partial data can be promptly requested, thereby improving the transmission performance of the simultaneous transmission service.

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 another aspect of the present invention, there is provided a simultaneous transmission / reception apparatus for transmitting data and a method for transmitting / receiving data, If the data is received for each different type of network, it determines that the missing partial data is immediately lost, and then transmits the partial data to the upper layer without waiting for transmission of the partial data of the transmission order information. As a result, It is possible to quickly request retransmission of unreceived partial data, thereby improving the transmission performance of the simultaneous transmission service. Accordingly, the present invention is not limited to the use of related technologies, Not only is sufficient Since the degree to which ever be obviously carried out by the invention in the industrial applicability.

100: terminal device
110: communication unit 120: buffer unit 130:

Claims (6)

A communication unit that receives partial data segmented from transmission target data through two or more access networks;
Corresponding to the partial data received through the two or more access networks, the partial data having the transmission order information after the transmission order information of the unreceived partial data is checked, and the identified partial data is determined from all of the two or more access networks. And a controller for determining that the unreceived partial data is lost when the received partial data is included and requesting retransmission of the unreceived partial data. The method of claim 1,
The control unit,
Confirm the access network where the partial data having the transmission order information after the transmission order information of the unreceived partial data is received from the checked partial data, and then all of the access networks other than the checked access network among the two or more access networks. And receiving partial data from the received partial data as lost, and requesting retransmission of the unreceived partial data. The method of claim 1,
The control unit,
And transmits a reception response including a retransmission request for the non-received partial data corresponding to each of the partial data included in the checked partial data, when it is determined that the non-received partial data is lost, Data transmission and reception apparatus. A partial data receiving step of receiving the partial data divided from the transmission target data through two or more access networks;
A partial data checking step of confirming partial data having transmission order information after transmission order information of unreceived partial data corresponding to each partial data received through the two or more access networks; And
And determining that the unreceived partial data is lost when the identified partial data includes partial data received from all of the two or more access networks, and including a retransmission request step of requesting retransmission of the unreceived partial data. Heterogeneous network-based simultaneous data transmission and reception method. 5. The method of claim 4,
The method of claim 1,
Confirm the access network in which the partial data having the transmission order information after the transmission order information of the unreceived partial data is received from the checked partial data; And receiving partial data from the received partial data as lost, and requesting retransmission of the unreceived partial data. 5. The method of claim 4,
The method of claim 1,
And transmits a reception response including a retransmission request for the non-received partial data corresponding to each piece of partial data contained in the partial data to be verified.
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