KR20220138195A - System for network bonding - Google Patents

Abstract

The present invention provides a network bonding system which comprises: a packetization unit making packets of a certain size from real-time data, and generating a plurality of packets, and granting an order number showing the order of the plurality of packets to the plurality of packets; a scheduling unit distributing the plurality of packets to a plurality of network nodes; a consecutive output unit receiving the plurality of packets through the plurality of network nodes, and consecutively outputting the plurality of packets in accordance with the input order; and a re-alignment unit consecutively receiving an input of the plurality of packets from the consecutive output unit, and generating re-alignment data made by re-aligning the plurality of packets in accordance with the ordering number. The re-alignment unit determines whether to output the re-alignment data based on a reference delay time. The present invention is able to more efficiently transmit real-time data.

Description

Network bonding system {SYSTEM FOR NETWORK BONDING}

The present invention relates to a network bonding system, and more particularly, to a network bonding system capable of setting variable delay in transmitting real-time data through multiple networks.

In many cases, it is not suitable for transmitting large amounts of real-time data such as high-definition video through a single network node. In particular, since it is difficult to continuously secure a stable network bandwidth in a wireless environment, a network bonding technology that combines the bandwidths of several networks is used.

Using such network bonding technology, high-definition real-time broadcasting can be performed because it is possible to stably transmit large amounts of data in real-time even in mountainous regions where internet access is difficult, disaster areas, or large gatherings where many people are gathered.

On the other hand, there is a basic problem of the network in transmitting general data or data requiring real-time performance through several network nodes.

Specifically, when data is transmitted through multiple network nodes due to the characteristics of the network, the time of arrival at the receiver always changes according to the transmission protocol or the characteristics and quality of the network. Therefore, most network bonding techniques basically assign sequential packet numbers to a plurality of packets in the transmitter and distribute them to several networks for transmission, and then use a method in which the receiver sequentially rearranges the plurality of packets again using the packet numbers. have. However, this method has a problem in that when some packets among a plurality of packets are lost or received too late, the real-time performance of data is lowered.

An object of the present invention is to provide a network bonding system capable of monitoring information such as latency, data throughput, and available bandwidth of a plurality of network nodes in real time.

In addition, the present invention is to provide a network bonding system that can improve real-time data by efficiently transmitting real-time data by distributing a plurality of packets to a plurality of network nodes according to the priority of the plurality of network nodes. The purpose.

Another object of the present invention is to provide a network bonding system capable of adjusting the degree of real-time data and data stability by adjusting a reference delay time according to the type or characteristic of real-time data.

The technical problems to be achieved in the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

In order to achieve the above object, the present invention provides a packetizer for generating a plurality of packets by packetizing real-time data to a predetermined size, and assigning an ordering number indicating an order of the plurality of packets to the plurality of packets; a scheduling unit for distributing packets of ' to a plurality of network nodes; Provides a network bonding system that sequentially receives packets from and generates reordering data by rearranging a plurality of packets according to an ordering number, and the reordering unit determines whether to output reordering data based on a reference delay time. .

Here, the packetizer may give a time stamp indicating when the plurality of packets are generated to the plurality of packets.

Also, the rearrangement unit may output the rearrangement data when the difference between the current time and the time stamp is equal to or greater than the reference delay time.

Also, the rearrangement unit may adjust the reference delay time according to the type or characteristic of real-time data.

Here, as the reference delay time is small, a transmission delay time of real-time data may decrease, and as the reference delay time is large, a packet loss rate of real-time data may decrease.

Also, the scheduling unit may assign a network ID indicating a plurality of network nodes distributed to the plurality of packets to the plurality of packets.

In addition, the sequential output unit may monitor the delay degree of the plurality of network nodes based on the time stamp.

In addition, the sequential output unit may monitor the data throughput and available bandwidth of the plurality of network nodes.

In addition, the scheduling unit may determine the priority of the network based on at least one of the delay degree of the plurality of network nodes, the throughput, and the available bandwidth.

Also, the scheduling unit may distribute a plurality of packets to a plurality of network nodes according to priorities.

According to the present invention, in transmitting real-time data through multiple networks, the transmitter transmits a plurality of packets by giving an ordering number, a timestamp, and a network identity to a plurality of packets, The receiver can monitor information such as latency, data throughput, and available bandwidth of a plurality of network nodes in real time by using the ordering number, time stamp, and network ID.

In addition, according to the present invention, information such as delay degree, data throughput, and available bandwidth of a plurality of network nodes is monitored in real time to determine a priority of a plurality of network nodes, and a plurality of packets are divided according to the priority. By distributing to network nodes, real-time data can be transmitted more efficiently, improving real-time data.

Also, according to the present invention, it is possible to adjust the degree of real-time data and data stability by adjusting the reference delay time according to the type or characteristic of real-time data.

Effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those of ordinary skill in the art from the following description.

1 is an overall configuration diagram of a network bonding system according to an embodiment of the present invention.
2 is a diagram for explaining an operation of a packetizer according to an embodiment of the present invention.
3 to 5 are diagrams for explaining a method in which a classifier distributes a plurality of packets to a plurality of network nodes according to priorities according to an embodiment of the present invention.
6 is a diagram for explaining an operation of a classifier of a scheduling unit according to an embodiment of the present invention.
7 is a view for explaining the operation of the rearranging unit according to an embodiment of the present invention.

A preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted.

In addition, in the description of the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the accompanying drawings.

1 is an overall configuration diagram of a network bonding system according to an embodiment of the present invention.

Referring to FIG. 1 , a network bonding system according to an embodiment of the present invention may include a transmitter 100 and a receiver 200 . Here, the transmitter 100 includes a packetizing unit 110 and a scheduling unit 120 , and the receiving unit 200 includes a serializing unit 210 and a reordering unit 220 . may include

2 is a diagram for explaining an operation of a packetizer according to an embodiment of the present invention.

1 and 2 , the packetizer 110 generates a plurality of packets 10a by packetizing the real-time data 10 to a predetermined size.

Meanwhile, in the real-time data 10 , the packet size per time is not constant. In particular, in the case of moving picture data, it can change from several tens of Kbytes to several Mbytes per second.

Accordingly, in order to improve the transmission efficiency of the network, it is preferable to packetize the real-time data 10 to a predetermined size to generate a plurality of packets 10a.

However, when packetizing only a certain size, it is more preferable to packetize the data so as not to exceed the set maximum size because real-time data is lowered.

On the other hand, when transmitting a plurality of packets 10a through one network, even if the transmitting unit 100 sequentially transmits a plurality of packets 10a according to the order, the receiving unit 200 receives the plurality of packets 10a in order. do not follow

In particular, when a plurality of packets 10a are transmitted through a plurality of networks as in the present invention, the plurality of packets 10a do not arrive at the receiving unit 200 more sequentially due to differences in characteristics or quality of the plurality of networks. .

Accordingly, in the present invention, when the transmitter 100 assigns an order to a plurality of packets 10a and transmits them to the receiver 200, the receiver 200 receives the packets 10a regardless of the arrival times of the plurality of packets 10a. ), the plurality of packets 10a are rearranged according to the sequence.

To this end, the packetizer 110 may assign an ordering number (ONUM) indicating the order of the plurality of packets 10a to each of the plurality of packets 10a.

Also, the packetizer 110 may give each of the plurality of packets 10a a time stamp (TS) indicating when the plurality of packets 10a are generated.

Accordingly, the receiver 200 can monitor the transmission quality of the network or adjust the reference delay time based on the time stamps TS given to the plurality of packets 10a, and determine whether to output the reordering data 20 . can

Referring to FIG. 1 , the scheduling unit 120 may include a classifier 121 and a scheduler 122 .

The classifier 121 may distribute the plurality of packets 10a to a plurality of network nodes. Here, the plurality of network nodes may be configured with various wireless communication networks such as WiFi, LAN, 4G and 5G.

The scheduler 122 may determine the priority of the network based on at least one of latency, data throughput, and available bandwidth of a plurality of network nodes. That is, a higher priority may be given to a network node having a small delay degree and data processing amount and a large available bandwidth among the plurality of network nodes.

In addition, the classifier 121 may distribute the plurality of packets 10a to the plurality of network nodes according to the priority determined by the scheduler 122 . That is, a plurality of packets 10a may be preferentially allocated to a network node having a relatively high priority.

3 to 5 are diagrams for explaining a method in which a classifier distributes a plurality of packets 10a to a plurality of network nodes according to priorities according to an embodiment of the present invention.

First, referring to FIG. 3 , the real-time data 10 is packetized into a plurality of packets 10a, and the plurality of packets 10a are respectively assigned No. 1 to No. 16 as an ordering number ONUM.

Here, when the priorities of the plurality of networks are the same, that is, when Ethernet, WiFi, LTE 4G, and 5G have the same priority as all 1, the classifier 121 sends packet 1 to Ethernet, WiFi, LTE 4G and 5G, respectively. , packet 2, packet 3, and packet 4 are allocated, and then packet 5, packet 6, packet 7, and packet 8 are allocated to Ethernet, WiFi, LTE 4G and 5G, respectively. (10a) is distributed to a plurality of network nodes.

Next, referring to FIG. 4 , the real-time data 10 is packetized into a plurality of packets 10a, and the plurality of packets 10a are respectively assigned numbers 1 to 16 as an ordering number ONUM.

Here, when the transmission priorities of a plurality of networks are sequential, that is, when the priorities of Ethernet, WiFi, LTE 4G, and 5G are sequentially 1 to 4, respectively, the classifier 121 is assigned to the Ethernet with the highest priority A plurality of packets 10a are multiplied in such a way that after allocating packets 1 to 5 only to the maximum possible number of packets, and then allocating packets 6 to 10 only to the maximum number of packets that can be allocated to the WiFi having the next higher priority. distributed to the network nodes of

Next, referring to FIG. 5 , the real-time data 10 is packetized into a plurality of packets 10a, and the plurality of packets 10a are respectively assigned Nos. 1 to 16 as an ordering number ONUM.

Here, when the transmission priorities of a plurality of networks are sequential and the same, for example, Ethernet and WiFi have the same priority as 1, and LTE 4G and 5G have the same priority of 2, the classifier 121 is the Ethernet And after alternately allocating packets 1 to 10 only to the maximum number of packets allocable to WiFi, and then alternately allocating packets 11 to 16 only to the maximum number of packets allocable to LTE 4G and 5G, respectively, a plurality of The packet 10a is distributed to a plurality of network nodes.

Accordingly, the network bonding system according to an embodiment of the present invention can stably transmit a large amount of data in real time even in a mountainous region or disaster area where Internet use is difficult, or a large gathering site where a large number of people are gathered. can broadcast.

In addition, the network bonding system according to an embodiment of the present invention distributes a plurality of packets 10a to a plurality of network nodes according to the priority of a plurality of networks, thereby more efficiently transmitting the real-time data 10 and Real-time performance can be improved.

6 is a diagram for explaining an operation of a classifier of a scheduling unit according to an embodiment of the present invention.

The classifier 121, after distributing the plurality of packets 10a to the plurality of network nodes, assigns a network ID (Network node ID; NID) indicating the plurality of network nodes distributed to the plurality of packets 10a to the plurality of packets. (10a) may be assigned respectively.

Accordingly, the receiver 200 may monitor the transmission quality of a specific network based on the network ID (NID) assigned to the plurality of packets 10a. For example, if a specific packet 10a to which a specific network ID (NID) is assigned is lost in the transmission process or the latency is high, the transmission quality of the network node corresponding to this specific network ID (NID) may be evaluated low. can

Referring to FIG. 1 , the sequential output unit 210 may include a serializer 211 and a network monitor 212 .

The sequential outputter 211 may receive a plurality of packets 10a through a plurality of network nodes, respectively, and sequentially output the plurality of packets 10a according to the input order.

The network monitor 212 may monitor the transmission quality of the network in real time based on the time stamp TS and the network ID NID given to the plurality of packets 10a.

Specifically, the network monitor 212 may monitor information such as delay degree, data throughput, available bandwidth, and packet loss of a plurality of network nodes in real time and transmit it to the scheduler 122 . For example, the network monitor 212 compares the current time with the time stamp (TS) of the specific packet 10a to which the specific network ID (NID) is assigned, and delays the network node corresponding to the specific network ID (NID). Latency can be ascertained.

Accordingly, the scheduler 122 may determine the priority of the network based on at least one of the delay degree, throughput, and available bandwidth of the plurality of network nodes, and the classifier 121 may determine the priority of the plurality of packets 10a according to the priority. ) can be distributed to multiple network nodes.

As such, the network bonding system according to an embodiment of the present invention monitors information such as delay degree, data throughput, and available bandwidth of a plurality of network nodes in real time to determine the priority of the plurality of network nodes, By distributing a plurality of packets 10a to a plurality of network nodes in accordance with the , it is possible to efficiently transmit the real-time data 10 to improve the real-time performance of the data.

7 is a view for explaining the operation of the rearranging unit according to an embodiment of the present invention.

Referring to FIG. 7 , the reordering unit 220 sequentially receives a plurality of packets 10a from the sequential output unit 210 , and rearranging the plurality of packets 10a according to an ordering number ONUM ( 20) can be created.

On the other hand, the plurality of packets 10a may not be input to the reordering unit 220 in the order of the ordering number ONUM, and some of the plurality of packets 10a may be lost in the transmission process or sent to the reordering unit 220 . It may be entered too late. For example, a 7th packet among packets 1 to 10 may be lost in a transmission process, or a packet 1 may be input to the reordering unit 220 too late.

Here, if the plurality of packets 10a are all inputted to the reordering unit 220 and then rearranged, the real-time performance of data is lowered.

In order to solve this problem, the reordering unit 220 may determine whether to output the reordering data 20 based on a set reference delay timeout.

Specifically, the reordering unit 220 may output the reordering data when the difference between the current time and the time stamps TS provided to the plurality of packets 10a is equal to or greater than the reference delay time. That is, the reordering unit 220 performs the difference between the current time and the time stamp Ts, even if some packets among the plurality of packets 10a are lost in the transmission process or are input too late to the reordering unit 220 so that the packet order is out of order. If the value is equal to or greater than the reference delay time, the rearrangement data 20 may be output.

Here, it may be determined whether to output the rearrangement data 20 based on the time of the time stamp TS given to any one of the plurality of packets 10a input to the rearrangement unit 220 . Alternatively, it may be determined whether to output the rearrangement data 20 based on the time of the time stamp TS given to the first packet 10a among the plurality of packets 10a input to the reordering unit 220 . .

Referring to FIG. 7 , when packet 7 among packets 1 to 10 is lost in the transmission process or has not yet been input to the reordering unit 220, packets 6 and 8 may be combined except for packet 7 . In addition, when the first packet among packets 1 to 10 is input too late, the remaining packets may be combined except for the first packet.

Meanwhile, as the reference delay time decreases, the transmission delay time of the real-time data 10 decreases, while the packet loss rate of the real-time data 10 increases. In contrast, as the reference delay time increases, the packet loss rate of the real-time data 10 decreases, while the transmission delay time of the real-time data 10 increases.

As described above, in consideration of the reference delay time and the real-time properties and packet loss rate of the real-time data 10 , the reordering unit 220 may adjust the reference delay time according to the type or characteristics of the real-time data 10 .

For example, the reordering unit 220 may set a relatively short reference delay time for data requiring relatively high real-time performance, and may set a relatively long reference delay time for data requiring relatively high stability.

As described above, the network bonding system according to an embodiment of the present invention can stably transmit large-capacity data in real-time even in mountainous regions or disaster areas where Internet use is difficult, or large-scale gatherings where many people gather, so that high-definition real-time can broadcast.

In addition, the network bonding system according to an embodiment of the present invention distributes a plurality of packets to a plurality of network nodes according to the priority of a plurality of networks, thereby efficiently transmitting real-time data 10 to further improve real-time data. can be improved

In addition, the network bonding system according to the embodiment of the present invention can adjust the real-time data and the degree of data stability by adjusting the reference delay time according to the type or characteristic of the real-time data 10 .

The embodiments described in this specification and the accompanying drawings are merely illustrative of some of the technical ideas included in the present invention. Therefore, since the embodiments disclosed in the present specification are for explanation rather than limitation of the technical spirit of the present invention, it is obvious that the scope of the technical spirit of the present invention is not limited by these embodiments. Modifications and specific embodiments that can be easily inferred by a person of ordinary skill in the art within the scope of the technical idea included in the specification and drawings of the present invention are included in the scope of the present invention. will have to be interpreted.

100: transmitter
110: packetization unit
120: scheduling unit
210: sequential output unit
220: rearrangement unit

Claims (10)

a packetizer for generating a plurality of packets by packetizing real-time data to a predetermined size, and assigning an ordering number indicating an order of the plurality of packets to the plurality of packets;
a scheduling unit for distributing the plurality of packets to a plurality of network nodes;
a sequential output unit receiving the plurality of packets through the plurality of network nodes and sequentially outputting the plurality of packets according to the input order;
a reordering unit receiving the plurality of packets sequentially from the sequential output unit and generating rearrangement data obtained by rearranging the plurality of packets according to the ordering number;
the rearrangement unit
Determining whether to output the rearrangement data based on a reference delay time
network bonding system.
The method of claim 1,
The packetizing unit
A time stamp indicating when the plurality of packets are generated is given to the plurality of packets.
network bonding system.
3. The method of claim 2,
the rearrangement unit
outputting the rearrangement data if the difference value between the current time and the time stamp is equal to or greater than the reference delay time
network bonding system.
The method of claim 1,
the rearrangement unit
adjusting the reference delay time according to the type or characteristic of the real-time data
network bonding system.
The method of claim 1,
As the reference delay time is smaller, the transmission delay time of the real-time data decreases,
As the reference delay time increases, the packet loss rate of the real-time data decreases.
network bonding system.
3. The method of claim 2,
The scheduling unit
A network ID indicating the plurality of network nodes distributed to the plurality of packets is given to the plurality of packets.
network bonding system.
7. The method of claim 6,
The sequential output
monitoring the degree of delay of the plurality of network nodes based on the time stamp
network bonding system.
8. The method of claim 7,
The sequential output
monitoring data throughput and available bandwidth of the plurality of network nodes;
network bonding system.
9. The method of claim 8,
The scheduling unit
determining the priority of the network based on at least one of a delay degree, throughput, and available bandwidth of the plurality of network nodes
network bonding system.
10. The method of claim 9,
The scheduling unit
Distributing the plurality of packets to the plurality of network nodes according to the priority
network bonding system.

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