KR101328732B1 - Apparatus for simultaneously transmitting data in heterogeneous network - Google Patents

Abstract

Disclosed are a transmission/reception device and a transmission/reception method for heterogeneous network-based simultaneous data transmission. According to the present invention, in an environment providing a simultaneous transmission service wherein partial data made by dividing data is transmitted/received by using multiple heterogeneous networks, the cost of storing each received partial data in a buffer and the cost of delivering each partial data stored in the buffer to an upper layer can be reduced by using the existing linked-list method and array method together in the process of rearranging received partial data at a reception side in consideration of different latency of heterogeneous networks, therefore, performance degradation due to partial data rearrangement can be effectively prevented. [Reference numerals] (110) Communication unit;(120) Partial data storage area;(125) Address information storage area;(130) Control unit

Description

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

The present invention relates to a data simultaneous transmission service scheme, and more particularly, to provide a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks, wherein different latency of heterogeneous networks is provided. In the process of reordering the received partial data of the receiving side considering the above, by using the existing linked-list method and the array method, the cost of storing each received partial data in the buffer and the upper part of each partial data stored in the buffer The present invention relates to a heterogeneous network-based simultaneous data transmission / reception apparatus and a transmission / reception method capable of effectively preventing performance degradation due to partial data rearrangement by reducing the cost of transmitting data.

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

In the heterogeneous network environment in which a plurality of networks are mixed, a current method of using a data service through a terminal device is a network selection method by directly changing a terminal device user, and a method in which controllability of a provider is excluded This is a passive approach when considering the position of the business operator.

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

Accordingly, in a heterogeneous network environment where a plurality of networks are mixed, a new service scheme for efficiently selecting a network of a terminal device according to the state of the network and efficiently using the selected network is desired.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a simultaneous transmission service for transmitting / receiving partial data obtained by dividing data using a plurality of heterogeneous networks. In the process of rearranging the received partial data of the receiving side considering the different latency of the network, by using the existing linked-list method and the array method, the cost of storing each received partial data in the buffer and each part stored in the buffer By reducing the cost of delivering data to the upper layer, it is effectively preventing the performance degradation due to partial data rearrangement.

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; And a control unit storing the received partial data in each partial data storage area and storing address information of each partial data storage area in each address information storage area related to order information of the respective partial data.

Preferably, the control unit, when the respective address information storage area for storing the address information is continuous, confirming the address information stored in each of the consecutive address information storage area and corresponding to the confirmed address information The partial data stored in each of the partial data storage areas may be acquired and transferred to the upper layer in the order of the respective address information storage areas.

Preferably, the control unit may store the received partial data in each of the partial data storage areas sequentially sequentially in the receiving order.

Preferably, each of the address information storage areas is matched with a consecutive storage address, and the controller is configured to match the address information of each of the partial data storage areas with each of the address information storage areas matching the storage address corresponding to the order information. Can be stored in

Preferably, when the order information of the additional partial data received after the partial data transferred to the upper layer is not continuous with the order information of the partial data transferred to the upper layer, the control point is when the additional partial data is received. The partial data stored in the partial data storage area may be transferred to the upper layer after a specific reception wait time from the.

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 storage step of storing each received partial data in each partial data storage area; And storing the address information of each partial data storage area in each address information storage area related to the order information of each partial data.

Preferably, in the partial data storage step, each of the received partial data may be stored in each of the partial data storage areas sequentially sequentially in the receiving order.

Preferably, when each of the address information storage areas for storing the respective address information is continuous, the address information of each of the partial data storage areas stored in each of the consecutive address information storage area is confirmed and the identified each The method may further include acquiring partial data stored in the partial data storage area and transferring the partial data stored in the partial data storage area to the upper layer in the order of the consecutive address information storage areas.

Preferably, when the order information of the additional partial data received after the partial data transferred to the upper layer is not continuous with the order information of the partial data delivered to the upper layer, a specific reception wait from the time of receiving the additional partial data The method may further include transferring the partial data stored in the partial data storage area to the upper layer after time.

Accordingly, according to the heterogeneous network-based simultaneous data 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, In the process of rearranging the received partial data of the receiving side considering the different latency, the existing linked-list method and the array method are mixed so that the cost of storing each received partial data in the buffer and each partial data stored in the buffer By reducing the cost of transferring to the upper layer, it is possible to effectively prevent performance degradation due to partial data reordering.

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 to 5 are exemplary views showing the structure of the partial data storage area and the address information storage area and an example of information storage according to an embodiment of the present invention.
6 is a flowchart illustrating a control flow of a heterogeneous network-based data transmission system according to a preferred embodiment of the present invention.
7 is a flowchart illustrating a flow of a heterogeneous network-based simultaneous data transmission and reception method according to an embodiment of the present invention.

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

FIG. 1 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 3G network, that is, a Gateway GPRS Support Node (GGSN) for operating a wireless packet service network. In addition, the second network device 300 includes a WiFi network, And an access point (AP) for operating a short-range wireless network.

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, the terminal device 100 on the receiving side considers that a difference in the reception timing of the partial data received through each network due to the transmission delay of each network causes each partial data received through each network in the receiving buffer. If the partial data of the previous sequence is not received, it is determined that the unreceived partial data is lost. If the partial data still unreceived is not received, the redundant data is transmitted to the upper layer after the first reception, thereby preventing unnecessary duplicate ack of the unreceived partial data delayed.

As a method of partial data rearrangement on the receiving side, a linked-list method and an array method exist.

The linked-list method stores partial data received through heterogeneous networks in an internal receiving buffer in the order in which they are received. Since the partial data is stored in the receiving order, the partial data is applied to an upper layer, that is, an application using a simultaneous transmission service. Since each time of transmission, the sequence number (sequence number) of each stored partial data must be checked and searched accordingly, which has a problem of deterioration in the receiving apparatus.

In addition, the array method checks the sequence number of the partial data whenever the partial data is received through the heterogeneous network, searches for the sequence information of each partial data stored in the reception buffer, Since all partial data must be moved according to the order information, there is a problem of performance degradation inside the receiving device.

Therefore, in the present invention, in the environment for providing simultaneous transmission service, in the partial data realignment process of the receiving device, it is necessary to store each partial data received by using the existing linked-list method and the array method in a buffer. We propose a configuration that can effectively prevent the performance degradation due to partial data rearrangement by reducing the cost of transferring the cost and each partial data stored in the buffer to the upper layer.

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

In this case, the management apparatus 400 assigns sequence numbers corresponding to the divided order to each partial data so that the original transmission target data can be restored by combining the partial data divided from the transmission target data. It is preferable to insert.

In addition, the management apparatus 400 transmits each partial data selected for each access network (eg, 3G and WiFi) through each access network (eg, 3G and WiFi), and thus, the first network device 200 is a management apparatus. The first partial data transmitted from the 400 is transmitted 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. .

Accordingly, the terminal device 100 may restore the transmission target data by combining the partial data received through the two or more networks based on the 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 partial data having the same address information (eg, virtual IP) indicating that the data is divided from one data based on address information (eg, virtual IP) included in the received partial data. And, they can be stored based on the order information included in the corresponding partial data.

In more detail, the terminal apparatus 100 stores the received partial data in each partial data storage area in the order of reception.

Then, the terminal device 100, based on the order information of each piece of data stored in each piece of data storage area, the address information of each piece of data storage area in the order of the address information in accordance with the order information of each piece of data Save to storage area.

Here, each partial data storage area and address information storage area correspond to the reception buffer.

That is, referring to FIG. 3, the terminal apparatus 100 stores each partial data including an area 120a in which address information (for example, node x) is recorded and an area 120b in which partial data is stored. A partial data storage area 120 configured as an area, an area 125a in which sequential storage addresses corresponding to the sequence information of the partial data to be received are recorded, and address information (eg, node x) of the partial data storage area are stored. An address information storage area 125 composed of an area 125b to be provided may be provided as a reception buffer.

Accordingly, the terminal device 100 stores the received partial data in order from the most recent partial data storage area among the empty partial data storage areas according to the received order.

For example, referring to FIG. 4, when the partial data storage area 120 is all empty and the partial data of the sequence information 1, the partial data of the sequence information 0 and the partial data of the sequence information 2 are received, the terminal device will be described. In step 100, the received partial data is sequentially stored from the first partial data storage area of each of the empty partial data storage areas in the order of reception. Partial data of order information 2 will be stored in node 3 of node 0 and node 3.

In addition, the terminal apparatus 100 obtains address information (eg, node x) of each of the partial data storage areas based on the order information of each of the partial data stored in each of the partial data storage areas. In order to store in the address information storage area 125 in order.

That is, the terminal apparatus 100 stores the partial data by matching the address information of each partial data storage area in which each partial data is stored with the storage address corresponding to the order information of the related partial data and storing the address information in the address information storage area. The address information of the area is stored in the address information storage area in order according to the order information of each piece of data.

4, the terminal device 100 matches address information of the partial data storage area in which the partial data of the sequence information 1 is stored, that is, node 1, with the storage address 1 corresponding to the sequence information 1. Then, the address information of the partial data storage area in which the partial data of the sequence information 0 is stored, that is, the node 2 is matched with the storage address 0 corresponding to the sequence information 0, and stored. By storing the address information, that is, node 3, by matching the storage address 2 corresponding to the order information 2, the address information of each partial data storage area is stored in the address information storage area 125 in order according to the order information of each partial data. Done.

And, when the transmission event to the upper layer for the partial data stored in the reception buffer occurs, the terminal device 100 is associated with the relevant information according to the address information of each of the partial data storage area stored in order in the address information storage area 125 The partial data stored in the data storage area can be obtained in order and delivered to the upper layer.

Here, the higher layer may be an application using a simultaneous transmission service in the terminal device 100 or a function unit (not shown) for performing a response response transmission and partial data combining according to TCP in front of an application using the simultaneous transmission service.

Therefore, when the upper layer is continuously transmitted without omission based on the order information (eg, 0, 1, 2) of the partial data to be transmitted as described above, the transmitted target data is combined according to the order information Will restore.

On the other hand, the upper layer, if the missing order information (eg, 3) is confirmed based on the order information (eg, 4, 5, 6) of the partial data transmitted as described above, and confirms the missing according to the general TCP retransmission rules In response to the partial data, a reception response (eg, Dup Ack) requesting retransmission is generated and provided to the external device 500 through the transmission device, that is, 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, in the simultaneous transmission service to which the present invention is applied, the terminal apparatus 100 transmits the partial data obtained by dividing the transmission target data to the management apparatus 400 during the uplink, and the management apparatus 400 rearranges the partial data. Since the combination, the terminal apparatus 100 as the transmitting apparatus in the uplink can perform the above-described partial data division, order information insertion / insertion, partial data transmission, etc. performed by the management apparatus 400 as the transmitting apparatus in the downlink. Uplink reception, partial data storage area and address information storage area, transfer to higher layer, partial data combining or retransmission request, etc. The management device 400 as a receiving device at the link may be performed.

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 transmission / reception apparatus, that is, the receiving side apparatus 100, according to a preferred embodiment of the present invention includes a communication unit 110 for receiving partial data divided from data to be transmitted through two or more access networks, and the reception unit. And a controller 130 for storing the partial data stored in each partial data storage area and storing the address information of each partial data storage area in each address information storage area related to the order information of the respective partial data.

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).

The controller 130 stores the received partial data in each partial data storage area in the order of reception.

The controller 130 stores the address information of each partial data storage area in each address information storage area related to the order information of the respective partial data.

Here, each partial data storage area and address information storage area correspond to a reception buffer.

That is, referring to FIG. 3, the heterogeneous network-based data transmission / reception apparatus 100 according to an exemplary embodiment of the present invention may include an area 120a and partial data in which address information (eg, node x) is recorded. The partial data storage area 120 including the partial data storage area including the area 120b to be stored, the area 125a and the partial data in which the sequential storage addresses corresponding to the order information of the partial data to be received are recorded. An address information storage area 125 configured as an area for storing address information (eg, node x) of the storage area 125b may be provided as a reception buffer.

Here, a method of allocating space for the partial data storage area 120 and the address information storage area 125 in the heterogeneous network-based simultaneous data transmission / reception apparatus 100 according to an exemplary embodiment of the present invention will be described. .

The maximum used memory size of the partial data storage area 120 is the number of partial data packets per second received through 3G / LTE and WiFi, the header size additionally included in each partial data packet at the transmitter, and the nodes of each partial data storage area. In order to connect, it may be calculated by multiplying the size of a pointer indicating a previous node Prev and a next node Next. The maximum memory size of the address information storage area 125 may be calculated as the number of bits for the expression range of the sequence number value present in the header added to the partial data packet at the transmitter. For example, if the sequence number can be represented by 2 bytes, the range of expressing the sequence number is 65536 (0 to 65535), so that the size of the address information storage area 125 is also 2 bytes to store 65536 sequence numbers. Set to. That is, the storage address number of the address information storage area 125 corresponds to the sequence number of the partial data packet.

As such, the heterogeneous network-based data simultaneous transmission / reception apparatus 100 according to an exemplary embodiment of the present invention may set a size of the partial data storage area 120 and the address information storage area 125 in advance, and may perform memory reorganization during partial data rearrangement. The lack of space avoids the reallocation of additional space, thereby avoiding performance degradation without wasting time.

Referring to the operation of the controller 130 again, the controller 130 stores the received partial data in order from the first partial data storage area of the empty partial data storage areas in the order of receiving them.

For example, referring to FIG. 4, when the partial data storage area 120 is all empty and partial data of the sequence information 1, partial data of the sequence information 0, and partial data of the sequence information 2 are received, the controller ( In step 130, the received partial data is sequentially stored from the first partial data storage area among the empty partial data storage areas in the receiving order, so that the partial data of the sequence information 1 and the second node have sequence information. Partial data of order information 2 will be stored in node 3 of node 0 and node 3.

The controller 130 may convert address information (eg, node x) of the respective partial data storage areas into order information of the partial data based on the order information of the respective partial data stored in each partial data storage area. The address information storage area 125 is sequentially stored.

That is, the controller 130 matches the address information of each partial data storage area in which each partial data is stored with the storage address corresponding to the order information of the related partial data and stores the address information in the address information storage area, thereby saving each partial data storage area. Address information is stored in the address information storage area in order according to the order information of each piece of data.

4, the controller 130 matches and stores address information of the partial data storage area in which the partial data of the sequence information 1 is stored, that is, node 1, with the storage address 1 corresponding to the sequence information 1. , Address information of the partial data storage area in which the partial data of the sequence information 0 is stored, that is, node 2 is matched with the storage address 0 corresponding to the sequence information 0, and the address of the partial data storage area in which the partial data of the sequence information 2 is stored. Information, namely, node 3 is stored in the address information storage area 125 by storing address information of each partial data storage area in order according to the order information of each partial data. do.

Then, when the transmission event to the upper layer for the partial data stored in the reception buffer occurs, the control unit 130 is the corresponding partial data according to the address information of each partial data storage area stored in order in the address information storage area 125 in order. The partial data stored in the storage area may be obtained in order and transferred to the upper layer.

That is, when each of the address information storage areas for storing address information is continuous, the controller 130 checks the address information stored in each of the consecutive address information storage areas and corresponds to the confirmed address information. The partial data stored in each partial data storage area may be obtained and transferred to the upper layer in the order of the respective address information storage areas.

Specifically, the controller 130 stores the address information in response to the at least one continuous sequence information when the partial data of the at least one continuous sequence information without the partial data of the unreceived previous sequence information is confirmed. According to the address information of each partial data storage area stored in order in the area, the respective partial data stored in the respective partial data storage areas may be sequentially obtained and transferred to the upper layer.

That is, when the partial data of at least one continuous sequence information without the partial data of the unreceived previous sequence information is confirmed, the controller 130 may recognize that the transmission event is generated to a higher layer.

For example, referring to FIG. 4, the controller 130 may include continuous sequence information 0, 1, without partial data of unreceived previous sequence information based on a storage address stored in the address information storage area 125. You can check the partial data of 2. The control unit 130, the address information of each partial data storage area stored in the address information storage area 125 in order to correspond to the sequence information 0, 1, 2, that is, node 2, node 1, node 3 Depending on the node, the stored partial data may be obtained in order from each relevant partial data storage area and transferred to the upper layer.

At this time, the control unit 130 of each of the partial data storage area, that is, node 1, node 2, node 3 stored the partial data of the order information 0, 1, 2 transmitted from the partial data storage area 120 to the upper layer Initialize and empty the partial data storage area, and also initialize the address information storage areas of storage address 1, storage address 2, and storage address 3 that have recorded node 1, node 2, and node 3 in the address information storage area 125. It is preferable to empty.

Here, the higher layer may be an application using a simultaneous transmission service in the terminal device 100 or a function unit (not shown) for performing a response response transmission and partial data combining according to TCP in front of an application using the simultaneous transmission service.

Therefore, when the upper layer is continuously transmitted without omission based on the order information (eg, 0, 1, 2) of the partial data to be transmitted as described above, the transmitted target data is combined according to the order information Will restore.

On the other hand, after the partial data of the order information 0, 1, 2 is transferred to the upper layer as described above, the partial data of the order information 4, 5, 6 is not received with the partial data of the order information 3 with reference to FIG. Referring to the case of receiving, the control unit 130 stores the received partial data in order from the first partial data storage area of each of the empty partial data storage areas in the order of reception, so that the sequence information 4 is stored in the first node. The partial data, the partial data of the sequence information 5 at the node 2, and the partial data of the sequence information 6 at the node 3 will be stored.

Then, the controller 130 matches the address information of the partial data storage area in which the partial data of the sequence information 4 is stored, that is, node 1 with the storage address 4 corresponding to the sequence information 4, and stores the partial data of the sequence information 5 Address information of the partial data storage area, i.e., node 2, is stored by matching the storage address 5 corresponding to the sequence information 5, and address information, namely, node 3, of the partial data storage area where the partial data of the sequence information 6 is stored. By matching and storing the storage address 6 corresponding to, the address information of each partial data storage area is stored in the address information storage area 125 in order according to the order information of each partial data.

Then, when the transmission event to the upper layer for the partial data stored in the reception buffer occurs, the control unit 130 is the corresponding partial data according to the address information of each partial data storage area stored in order in the address information storage area 125 in order. The partial data stored in the storage area may be obtained in order and transferred to the upper layer.

That is, when the order information of the additional partial data received after the partial data transferred to the upper layer is not continuous with the order information of the partial data delivered to the upper layer, the controller 130 may receive the data from the time of receiving the additional partial data. After a specific reception wait time, the partial data stored in the partial data storage area may be delivered to the upper layer.

Specifically, the control unit 130, the partial data having the order information after the order information of the unreceived partial data is confirmed, the specific part received first after the order information of the unreceived partial data and stored in the partial data storage area When a specific reception waiting time has elapsed from the reception of the data, the partial data stored in the partial data storage area may be obtained and transferred to the upper layer.

That is, when the partial data having the order information after the order information of the unreceived partial data is confirmed, the controller 130 receives the additional partial data received first after the order information of the unreceived partial data and stored in the partial data storage area. By counting a specific reception waiting time based on a time point, when the reception waiting time elapses, it may be recognized as a generation of a delivery event to a higher layer.

For example, referring to FIG. 5, the controller 130 receives after partial data (eg, 0, 1, 2) transferred to an upper layer based on a storage address stored in the address information storage area 125. If it is confirmed that the order information of the additional partial data (for example, 4) is not continuous with the order information of the partial data transmitted to the upper layer, the order information 4 having the order information 3 or later of the unreceived partial data is stored. Same as checking.

Therefore, the controller 130 may determine a specific reception waiting time based on the reception time of the additional data, that is, the first data received after the sequence information 3 of the unreceived partial data and stored in the first partial data storage area. Start counting.

Thus, the controller 130, while counting the reception waiting time, if the partial data of the sequence information 5, 6 is additionally received but the unreceived partial data of the preceding sequence information 3 is still not received, and eventually the reception wait time has elapsed, The stored partial data may be obtained from each partial data storage area of the current partial data storage area 120 and transferred to the upper layer.

At this time, the control unit 130 of each of the partial data storage area, that is, node 1, node 2, node 3 stored the partial data of the order information 4, 5, 6 transmitted from the partial data storage area 120 to the upper layer Initialize and empty the partial data storage area, and also initialize the address information storage areas of storage address 4, storage address 5, and storage address 6, which have recorded node 1, node 2, and node 3 in the address information storage area 125. It is preferable to empty.

Therefore, the upper layer, when the missing order information (eg 3) is confirmed based on the order information (eg 4, 5, 6) of the partial data to be transmitted as described above, confirm the missing according to the general TCP retransmission rules In response to the partial data, a reception response (eg, Dup Ack) requesting retransmission is generated and provided to the external device 500 through the transmission device, that is, the management device 400.

As described above, the heterogeneous network-based data transmission and reception apparatus according to the preferred embodiment of the present invention buffers each partial data received by storing partial data received through the heterogeneous network in the partial data storage area in the order of reception. Saves the address information (ie, node x) of the partial data storage area stored in the corresponding storage address of the address information storage area that is close to 0, and the time cost required to store the data is close to 0. Afterwards, when partial data stored in the buffer is transferred to the upper layer, the partial data is acquired and transferred in order based on the address information of the partial data storage area stored in the storage address of the address information storage area in order. 0 time cost for navigation to the tier Since the closer, and to avoid performance degradation caused by data re-arrangement section effectively.

Hereinafter, an operation flow of heterogeneous network-based data transmission service according to a preferred embodiment of the present invention will be described with reference to FIGS. 6 and 7. Herein, for convenience of description, reference will be made to the names and reference numbers mentioned in FIGS. 5 to 5 as necessary.

First, an operation flow in a heterogeneous network-based data transmission system according to a preferred embodiment of the present invention will be described with reference to FIG. 6.

For convenience of description, referring to the downlink, the management device 400 divides the data into partial data when receiving the transmission target data to be transmitted from the external device 500 to the terminal device 100. Each partial data is selected for each access network (S10, S20).

That is, when the management device 400 receives the transmission target data to be transmitted from the external device 500 to the terminal device 100, the management device 400 divides the data into partial data (S10) and for each access network (eg, 3G and WiFi). Check the data transmission rate, that is, the first transmission rate for data transmission to the first network device 200 and the second transmission rate for data transmission to the second network device 300, and then the transmission target based on the confirmed transmission rate. The first partial data to be transmitted to the first network apparatus 200 is selected among the partial data divided from the data, and the second partial data to be transmitted to the second network apparatus 300 is selected among the remaining partial data (S20). .

At this time, the management device 400, it is preferable to assign / insert the order information to each piece of data in step S10 to combine the partial data divided from the data to be transmitted to restore the original data.

In addition, the management apparatus 400 transmits each partial data selected for each access network (eg, 3G and WiFi) through each access network (eg, 3G and WiFi), and thus, the first network device 200 is a management apparatus. The first partial data transmitted from the 400 is transmitted to the terminal device 100 (S30), and the second network device 300 transmits the second partial data transmitted from the management device 400 to the terminal device 100. It is to be transmitted (S35).

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.

In more detail, the terminal device 100 receives the first partial data from the first network device 200 through two or more access networks (eg, WiFi, 3G), and transmits the second partial data to the second network device. Received from the 300 (S40).

Accordingly, the terminal device 100 recognizes partial data having the same address information (eg, virtual IP) indicating that the data is divided from one data based on address information (eg, virtual IP) included in the received partial data. And, they can be stored based on the order information included in the corresponding partial data.

In more detail, the terminal apparatus 100 stores the received partial data in each partial data storage area in the order of reception (S50).

Then, the terminal device 100, based on the order information of each piece of data stored in each piece of data storage area, the address information of each piece of data storage area in the order of the address information in accordance with the order information of each piece of data Store in the storage area (S60).

Here, each partial data storage area and address information storage area correspond to the reception buffer.

That is, referring to FIG. 3, the terminal apparatus 100 stores each partial data including an area 120a in which address information (for example, node x) is recorded and an area 120b in which partial data is stored. A partial data storage area 120 configured as an area, an area 125a in which sequential storage addresses corresponding to the sequence information of the partial data to be received are recorded, and address information (eg, node x) of the partial data storage area are stored. An address information storage area 125 composed of an area 125b to be provided may be provided as a reception buffer.

Accordingly, the terminal device 100 stores the received partial data in order from the first partial data storage area among the empty partial data storage areas in step S50.

For example, referring to FIG. 4, when the partial data storage area 120 is all empty and the partial data of the sequence information 1, the partial data of the sequence information 0 and the partial data of the sequence information 2 are received, the terminal device will be described. In step 100, the received partial data is sequentially stored from the first partial data storage area of each of the empty partial data storage areas in the order of reception. Partial data of order information 2 will be stored in node 3 of node 0 and node 3.

In operation S60, the terminal device 100 obtains the address information (eg, node x) of each of the partial data storage areas based on the order information of the respective partial data stored in each of the partial data storage areas. The information is stored in the address information storage area 125 in order according to the order information.

That is, the terminal apparatus 100 stores the partial data by matching the address information of each partial data storage area in which each partial data is stored with the storage address corresponding to the order information of the related partial data and storing the address information in the address information storage area. The address information of the area is stored in the address information storage area in order according to the order information of each piece of data.

4, the terminal device 100 matches address information of the partial data storage area in which the partial data of the sequence information 1 is stored, that is, node 1, with the storage address 1 corresponding to the sequence information 1. Then, the address information of the partial data storage area in which the partial data of the sequence information 0 is stored, that is, the node 2 is matched with the storage address 0 corresponding to the sequence information 0, and stored. By storing the address information, that is, node 3, by matching the storage address 2 corresponding to the order information 2, the address information of each partial data storage area is stored in the address information storage area 125 in order according to the order information of each partial data. Done.

And, when the transmission event to the upper layer for the partial data stored in the reception buffer occurs, the terminal device 100 is associated with the relevant information according to the address information of each of the partial data storage area stored in order in the address information storage area 125 The partial data stored in the data storage area may be obtained in order and transferred to the upper layer (S70).

Here, the higher layer may be an application using a simultaneous transmission service in the terminal device 100 or a function unit (not shown) for performing a response response transmission and partial data combining according to TCP in front of an application using the simultaneous transmission service.

Therefore, when the upper layer is continuously transmitted without omission based on the order information (eg, 0, 1, 2) of the partial data to be transmitted as described above, the transmitted target data is combined according to the order information It will be restored (S90).

On the other hand, the upper layer, if the missing order information (eg, 3) is confirmed based on the order information (eg, 4, 5, 6) of the partial data transmitted as described above, and confirms the missing according to the general TCP retransmission rules In response to the partial data, a reception response (eg, Dup Ack) requesting retransmission is generated and provided to the external device 500 through the transmission device, that is, the management device 400 (S95).

Hereinafter, referring to FIG. 7, a heterogeneous network-based simultaneous data transmission / reception method according to a preferred embodiment of the present invention, that is, an operation method of a receiving device will be described in detail.

In the heterogeneous network-based data simultaneous transmission and reception method according to the present invention, a plurality of pieces of partial data divided from data to be transmitted may be received from two or more access networks (eg, 3G, WiFi) from the management apparatus 400 described above. (S100).

In the heterogeneous network-based data transmission / reception method according to the present invention, each received partial data is stored in each partial data storage area in the order of reception (S110).

In the heterogeneous network-based data transmission / reception method according to the present invention, the address information of each partial data storage area is determined based on the order information of the respective partial data stored in each partial data storage area. The data is stored in the address information storage area in order according to the information (S120).

Here, each partial data storage area and address information storage area correspond to a reception buffer.

That is, referring to FIG. 3, the heterogeneous network-based data transmission / reception apparatus 100 according to an exemplary embodiment of the present invention may include an area 120a and partial data in which address information (eg, node x) is recorded. The partial data storage area 120 including the partial data storage area including the area 120b to be stored, the area 125a and the partial data in which the sequential storage addresses corresponding to the order information of the partial data to be received are recorded. An address information storage area 125 configured as an area for storing address information (eg, node x) of the storage area 125b may be provided as a reception buffer.

Accordingly, the heterogeneous network-based data transmission and reception method according to the present invention stores the received partial data in order from the first partial data storage area of the empty partial data storage areas in step S110 according to the received order.

For example, referring to FIG. 4, when the partial data storage area 120 is all empty and the partial data of the sequence information 1, the partial data of the sequence information 0 and the partial data of the sequence information 2 are received, the present invention will be described. In the heterogeneous network-based simultaneous data transmission and reception method according to the present invention, the received partial data is sequentially stored in the order of receiving the first partial data storage area from the first partial data storage area among the empty partial data storage areas. Data, the partial data of the sequence information 0 in the node 2, and the partial data of the sequence information 2 in the node 3 will be stored.

The heterogeneous network-based data transmission / reception method according to the present invention may include address information (eg, x number) of each partial data storage area based on order information of each partial data stored in each partial data storage area in step S120. Nodes) are stored in the address information storage area 125 in order according to the order information of each piece of data.

That is, in the heterogeneous network-based data transmission / reception method according to the present invention, the address information of each partial data storage area in which each partial data is stored is matched to the storage address corresponding to the order information of the related partial data to the address information storage area. By storing, the address information of each partial data storage area is stored in the address information storage area in order according to the order information of each partial data.

Therefore, referring to FIG. 4, the heterogeneous network-based data transmission / reception method according to the present invention may include address information, that is, node 1, corresponding to sequence information 1 of a partial data storage area in which partial data of sequence information 1 is stored. Matches and stores address 1 of the partial data storage area in which the partial data of the sequence information 0 is stored, matches node 2 with the storage address 0 corresponding to the sequence information 0, and stores the partial data of the sequence information 2. Address information of the partial data storage area, that is, node 3, is stored by matching the storage address 2 corresponding to the sequence information 2, and the address information of each partial data storage area is sequentially stored according to the order information of each partial data. The storage area 125 is stored.

In the heterogeneous network-based data transmission and reception method according to the present invention, when a delivery event to a higher layer for partial data stored in a reception buffer occurs, the partial data storage areas of the partial data storage areas are sequentially stored in the address information storage area 125. The stored partial data may be sequentially obtained from the relevant partial data storage area according to the address information, and transferred to the upper layer.

Specifically, the heterogeneous network-based data simultaneous transmission and reception method according to the present invention determines whether partial data of at least one continuous sequence information without the partial data of unreceived previous sequence information is identified (S130).

That is, the heterogeneous network-based data simultaneous transmission / reception method according to the present invention may be recognized as a generation of a forwarding event to a higher layer when partial data of at least one continuous sequence information without the partial data of unreceived previous sequence information is identified. have.

In the heterogeneous network-based simultaneous data transmission / reception method according to the present invention, if the partial data of the at least one continuous sequence information without the partial data of the unreceived previous sequence information is determined as a result of step S130, the at least one continuous In response to the order information, the stored partial data may be sequentially obtained from the associated partial data storage area according to the address information of each partial data storage area stored in the address information storage area in order and transferred to the upper layer (S140).

For example, referring to FIG. 4, in the heterogeneous network-based data transmission / reception method according to the present invention, there is no partial data of unreceived previous order information based on a storage address stored in the address information storage area 125. The partial data of the sequence information 0, 1, 2 can be checked. In the heterogeneous network-based data transmission and reception method according to the present invention, the address information of each partial data storage area sequentially stored in the address information storage area 125 corresponding to the continuous order information 0, 1, 2, that is, twice. The partial data stored in each partial data storage area according to the node, the node 1, and the node 3 can be obtained in order and delivered to the upper layer.

At this time, heterogeneous network-based data transmission and reception method according to the present invention, each partial data storage area that is stored in the partial data of the order information 0, 1, 2 transmitted from the partial data storage area 120 to the upper layer, that is, node 1, Initialize and empty the partial data storage area of node 2 and node 3. In addition, storage address 1, storage address 2, and storage address 3 that record node 1, node 2, and node 3 in the address information storage area 125. It is preferable to initialize and empty the address information storage area of (S150).

In this case, the upper layer is a heterogeneous network-based simultaneous data transmission / reception apparatus 100 according to the present invention, which performs a reception response transmission and partial data combining according to TCP in an application using a simultaneous transmission service or an application front end using a simultaneous transmission service. It may be a functional unit (not shown).

Therefore, in the heterogeneous network-based simultaneous data transmission and reception method according to the present invention, when the upper layer is continuously transmitted without omission based on the order information (for example, 0,1,2) of the partial data transmitted as described above, the forwarding is performed. The data to be transmitted will be restored by combining the partial data according to the order information.

On the other hand, after the partial data of the order information 0, 1, 2 is transferred to the upper layer as described above, the partial data of the order information 4, 5, 6 is not received with the partial data of the order information 3 with reference to FIG. Referring to the case of receiving, heterogeneous network-based data transmission and reception method according to the present invention, in step S110, each of the partial data received in the order of receiving the partial data storage area of the empty partial data storage area in order from the first partial data storage area in order By storing, the partial data of the sequence information 4 is stored in the node 1, the partial data of the sequence information 5 in the node 2, and the partial data of the sequence information 6 in the node 3.

In the heterogeneous network-based data transmission and reception method according to the present invention, in step S120, by matching address information, that is, node 1, of the partial data storage area in which the partial data of the sequence information 4 is stored with the storage address 4 corresponding to the sequence information 4, A partial data storage area in which the address information of the partial data storage area in which the partial data of the sequence information 5 is stored is matched with the storage address 5 corresponding to the sequence information 5, and the partial data storage area in which the partial data of the sequence information 6 is stored By matching the address information, that is, node 3 with the storage address 6 corresponding to the sequence information 6, the address information of each partial data storage area is stored in the address information storage area 125 in order according to the order information of each partial data. Will be saved.

Therefore, in the embodiment of FIG. 5, in the heterogeneous network-based data transmission / reception method according to the present invention, the partial data of at least one continuous sequence information without the partial data of the preceding sequence information not received as a result of the determination in step S130 is included. Will not be confirmed.

In this case, in the heterogeneous network-based data simultaneous transmission and reception method according to the present invention, the partial data having the order information after the order information of the unreceived partial data is confirmed, and the first received after the order information of the unreceived partial data is partial data. When a specific reception wait time has elapsed from the reception of the specific partial data stored in the storage area, the respective partial data stored from the respective partial data storage areas may be obtained and transferred to the upper layer.

That is, in the heterogeneous network-based data simultaneous transmission / reception method according to the present invention, when partial data having sequence information after the sequence information of unreceived partial data is confirmed, the partial data is first received after the sequence information of the unreceived partial data and stored. By counting a specific reception waiting time on the basis of the reception time of the specific partial data stored in the area, when the reception waiting time elapses, it can be recognized as the occurrence of a delivery event to a higher layer.

For example, referring to FIG. 5, in the heterogeneous network-based data transmission / reception method according to the present invention, after order information 3 of unreceived partial data based on a storage address stored in the address information storage area 125, When the partial data having the sequence information 4 is confirmed, a specific reception waiting time is determined based on the reception time of the partial data of the sequence information 4 received first after the sequence information 3 of the unreceived partial data and stored in the first partial data storage area. Start counting (S160).

Accordingly, in the heterogeneous network-based simultaneous data transmission / reception method according to the present invention, partial data of sequence information 5 and 6 is received while counting reception wait time, but partial data of unreceived previous sequence information 3 is still not received and eventually received. When the waiting time has elapsed (S170), the stored partial data may be obtained from each partial data storage area of the current partial data storage area 120 and transferred to the upper layer (S180).

At this time, heterogeneous network-based data transmission and reception method according to the present invention, each partial data storage area, that is, node 1, which stores the partial data of the order information 4, 5, 6 transmitted from the partial data storage area 120 to the upper layer, Initialize and empty the partial data storage area of node 2 and node 3. In addition, storage address 4, storage address 5, and storage address 6 recorded in node 1, node 2, and node 3 in the address information storage area 125. It is preferable to initialize and empty the address information storage area of (S190).

Therefore, the upper layer, when the missing order information (eg 3) is confirmed based on the order information (eg 4, 5, 6) of the partial data to be transmitted as described above, confirm the missing according to the general TCP retransmission rules In response to the partial data, a reception response (eg, Dup Ack) requesting retransmission is generated and provided to the external device 500 through the transmission device, that is, the management device 400.

As described above, the heterogeneous network-based data transmission and reception method according to the preferred embodiment of the present invention buffers each partial data received by storing partial data received through the heterogeneous network in the partial data storage area in the order of reception. Saves the address information (ie, node x) of the partial data storage area stored in the corresponding storage address of the address information storage area that is close to 0, and the time cost required to store the data is close to 0. Afterwards, when partial data stored in the buffer is transferred to the upper layer, the partial data is acquired and transferred in order based on the address information of the partial data storage area stored in the storage address of the address information storage area in order. 0 time cost for navigation to the tier Since the closer, and to avoid performance degradation caused by data re-arrangement section effectively.

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

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

According to the heterogeneous network-based simultaneous data transmission / reception apparatus and transmission / reception method according to the present invention, in an environment for providing a simultaneous transmission service, in the process of realigning the reception partial data of the receiving side considering different latency of the heterogeneous network, the existing linked- By mixing the list method and the array method, the cost of storing each partial data received in the buffer and the cost of delivering each partial data stored in the buffer to the upper layer are effectively prevented, thereby preventing the performance degradation due to the partial data rearrangement. In this regard, the invention is an industrially available invention because the possibility of marketing or operating the applied device is not only sufficient for the use of the related technology as well as the use of the related technology as well as the degree of practical clarity. .

100: terminal device
110: communication unit 120: partial data storage area
125: address information storage area 130: control unit

Claims (9)

A communication unit that receives partial data segmented from transmission target data through two or more access networks; And
A control unit for storing the received partial data in each partial data storage area and storing address information of each partial data storage area in each address information storage area related to order information of the respective partial data;
The control unit,
And heterogeneous network-based data simultaneous transmission / reception apparatus for transmitting partial data stored in each partial data storage area to a higher layer according to the order of the respective address information storage areas. The method of claim 1,
The control unit,
When each of the address information storage areas for storing the address information is continuous, the address information stored in each of the consecutive address information storage areas is checked and stored in the partial data storage areas corresponding to the identified address information. And heterogeneous network-based data transmission / reception apparatus for acquiring partial data and transmitting the partial data to the upper layer according to the order of each address information storage area. The method of claim 1,
The control unit,
And heterogeneous network-based data simultaneous transmission / reception apparatus for storing the received partial data in each of the partial data storage areas sequentially sequentially in the receiving order. The method of claim 1,
Each address information storage area is matched with a consecutive storage address,
The control unit,
And heterogeneous network-based data transmission / reception apparatus for storing the address information of each partial data storage area in each address information storage area matched with a storage address corresponding to the order information. 3. The method of claim 2,
The control unit,
If the order information of the additional partial data received after the partial data transferred to the higher layer is not continuous with the order information of the partial data delivered to the higher layer, the specific partial information is received after a specific reception waiting time from the reception point of the additional partial data. And heterogeneous network-based data simultaneous transmission / reception apparatus for transmitting partial data stored in a partial data storage area to the upper layer. 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 storage step of storing each received partial data in each partial data storage area; And
Storing the address information of each partial data storage area in each address information storage area related to the order information of each partial data,
And transmitting a partial data stored in each of the partial data storage areas to a higher layer according to the order of the respective address information storage areas. The method according to claim 6,
The partial data storage step,
And heterogeneous network-based data simultaneous transmission / reception method for storing the received partial data in each of the partial data storage areas sequentially sequentially in the receiving order. The method according to claim 6,
Wherein the delivering comprises:
When each of the address information storage areas where the respective address information is stored is continuous, the address information of each of the partial data storage areas stored in each of the consecutive address information storage areas is checked and the identified partial data storage areas are identified. And transmitting the partial data stored in the second layer to the upper layer according to the sequence of the consecutive address information storage areas. The method of claim 8,
If the order information of the additional partial data received after the partial data transferred to the higher layer is not continuous with the order information of the partial data delivered to the higher layer, the specific partial information is received after a specific reception waiting time from the reception point of the additional partial data. And transmitting the partial data stored in the partial data storage area to the upper layer.

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