KR20180092179A - System of satellite networks - Google Patents

Abstract

The present disclosure relates to a satellite network system. The satellite network system includes at least one first node for generating and transmitting first information to a second node, and a second node for generating second information based on the first information received from at least one of the at least one first node and transmitting the generated second information to all of the at least one first node. The second node transmits the second information to the at least one first node through a designated packet exclusive section among the sections of a communication channel for transmitting and receiving data to/from the at least one first node. It is possible to solve the problem of traffic overhead due to a broadcast mode.

Description

SYSTEM OF SATELLITE NETWORKS [0002]

TECHNICAL FIELD The present disclosure relates to a satellite network system, and more particularly, to a satellite network system using an Open Shortest Path First (OSPF) routing protocol.

Background of the Invention [0002] The technology underlying the present invention relates to a satellite network system.

Conventionally, a network system of a satellite network uses an OSPF (Open Shortest Path First) routing protocol. OSPF network operating modes include DR (Designated Router) -based Broadcast mode and NBMA (Non-Broadcast Multiple Access) mode. Since DR collects updates of all routers and simultaneously distributes collected routing information to all routers, it reduces the overall routing update overhead. When operating in Broadcast mode, all routers connected to the network can be set to DR. On the other hand, the NBMA mode requires that the operator specify Neighbor, which is a router to manually transmit messages.

Comparing each operation mode, there is a possibility of error in operation management because there is a disadvantage in that NBMA mode is required to specify manual Neighbor in satellite network. In addition, it takes time to designate a neighboring router in the entire satellite network. On the other hand, when broadcasting mode is applied, traffic overhead due to broadcast of Hello Packet message may occur.

That is, the NBMA mode has a problem in the operation management of the network system, and the broadcast mode has a problem of the traffic overhead of the Hello Packet message. Due to the problems of each of these modes, there is a limitation in applying the OSPF routing protocol to the satellite network structure.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a satellite network system capable of improving traffic overhead due to a broadcast mode.

More specifically, it is intended to provide a satellite network system capable of improving traffic overhead due to a conventional broadcast mode by separately managing traffic generated by an OSPF routing protocol.

According to an aspect of the present invention, there is provided a network system including at least one first node for generating first information and transmitting the first information to a second node, And a second node for generating second information based on the first information and for transmitting the generated second information to all of the one or more first nodes, The second node transmits the second information to the one or more first nodes through a packet-dedicated period previously designated in a section of a communication channel for transmitting and receiving the first channel.

In one embodiment, the at least one first node and the second node may be implemented with an Open Shortest Path First (OSPF) routing protocol.

In one embodiment, the at least one first node and the second node may transmit and receive data to each other through a section of the communication channel except for the packet-dedicated section.

In one embodiment, each of the one or more first nodes may be assigned a predetermined period of a section of the communication channel to transmit / receive data to / from the second node through the assigned channel.

In one embodiment, the first node may transmit the first information to the second node in a unicast communication manner.

In one embodiment, the second node may transmit the second information over the one or more first nodes in a broadcast communication manner.

In one embodiment, the packet-only period may be specified by including an interval in which the interval of the communication channel corresponds to an intermediate value in a specified range.

In one embodiment, the packet-only section may be designated as a section of a specific range based on the intermediate value.

In one embodiment, the second information may include communication packet information for establishing communication relationships between the one or more first nodes and the second node, and control packet information for controlling transmission of the communication packet information.

In one embodiment, the control packet information analyzes MAC (Media Access Control) address information corresponding to the communication address information based on communication address information of the one or more first nodes included in the communication packet information And control transmission of the communication packet information according to the analyzed MAC address information.

The satellite network system disclosed in this specification has an effect of facilitating the routing update of the network system using the OSPF routing protocol by designating dedicated communication channels through which the routing update is transmitted in a broadcast manner.

In addition, the satellite network system disclosed in this specification has an effect of facilitating the application of the broadcast system in the network system using the OSPF routing protocol.

More specifically, in consideration of the satellite network operation situation, the broadcast mode is advantageous in that it does not have manual designation unlike the NBMA mode. Therefore, there is no possibility of occurrence of errors in operation management and there is no need to designate a neighbor router in the entire satellite network, The demand can be reduced.

In addition, by allocating a time slot interval for managing the hello packet traffic of the OSPF routing protocol in the data traffic channel, convenience / ease of traffic management can be increased.

In addition, since the information (LSU) of the OSPF routing protocol can be read in the MAC layer by designating a control unit between the MAC layer and the IP layer in the time slot period, applicability / utility of the commercial OSPF routing protocol can be increased.

As described above, the satellite network system disclosed in this specification can improve the traffic overhead due to the broadcast mode by separately managing the traffic generated by the OSPF routing protocol, and can solve the problem of the traffic overhead according to the broadcast mode It is possible to improve the limitations of the prior art.

1 is a block diagram showing a configuration of a satellite network system disclosed in this specification;
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a data transmission /
3 is an exemplary diagram illustrating an example of data transmission / reception in accordance with an embodiment of a satellite network system disclosed herein.
4 is an exemplary diagram illustrating an example of a packet only period according to an embodiment of a satellite network system disclosed herein.
5 is an illustration of an example of communication packet information according to an embodiment of a satellite network system disclosed herein.

The invention disclosed herein can be applied to a satellite network system. However, the present invention is not limited thereto, and can be applied to a data transmission / reception device, a data transmission / reception system, a communication device, a communication system, and a network communication structure to which the technical idea of the present invention can be applied. In particular, the present invention can be effectively applied to a network structure for updating routing information in a satellite network system using an OSPF (Open Shortest Path First) routing protocol.

It is noted that the technical terms used herein are used only to describe specific embodiments and are not intended to limit the scope of the technology disclosed herein. Also, the technical terms used herein should be interpreted as being generally understood by those skilled in the art to which the presently disclosed subject matter belongs, unless the context clearly dictates otherwise in this specification, Should not be construed in a broader sense, or interpreted in an oversimplified sense. In addition, when a technical term used in this specification is an erroneous technical term that does not accurately express the concept of the technology disclosed in this specification, it should be understood that technical terms which can be understood by a person skilled in the art are replaced. Also, the general terms used in the present specification should be interpreted in accordance with the predefined or prior context, and should not be construed as being excessively reduced in meaning.

Also, the singular forms "as used herein include plural referents unless the context clearly dictates otherwise. In this specification, the terms "comprising ", or" comprising "and the like should not be construed as necessarily including the various elements or steps described in the specification, Or may be further comprised of additional components or steps.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals denote like or similar elements, and redundant description thereof will be omitted.

In describing the techniques disclosed in this specification, descriptions of general / essential technical terms (terms, concepts, etc.) to the extent that those skilled in the art can easily understand are omitted as far as possible, The detailed description thereof will be omitted if it is judged that the description of the technical knowledge disclosed in this specification may be blurred. It is to be noted that the attached drawings are only for the purpose of easily understanding the concept of the technology disclosed in the present specification, and should not be construed as limiting the spirit of the technology by the attached drawings.

Hereinafter, the satellite network system disclosed herein will be described with reference to Figs. 1-5.

1 is a block diagram showing the configuration of a satellite network system disclosed in the present specification.

2 is a configuration diagram illustrating a data transmission / reception structure of the satellite network system disclosed in this specification.

3 is an exemplary diagram illustrating an example of data transmission and reception according to an embodiment of a satellite network system disclosed herein.

4 is an exemplary diagram illustrating an example of a packet only period according to an embodiment of a satellite network system disclosed herein.

5 is an illustration showing an example of communication packet information according to an embodiment of a satellite network system disclosed herein.

The satellite network system (hereinafter referred to as a system) disclosed in the present specification may be a network system using an Open Shortest Path First (OSPF) routing protocol.

The system may be a satellite network system in which communication is performed between a plurality of satellites.

That is, the system may be a satellite network system in which communication is performed between a plurality of satellites using a routing protocol.

The system may be a satellite network system in which routing updates are made between a plurality of satellites.

The configuration of the system 100 is as shown in FIG.

The system 100 includes at least one first node 10 and a second node 20, as shown in FIG.

The first node 10 and the second node 20 may refer to a satellite for performing communication.

The Open Shortest Path First (OSPF) routing protocol may be applied to the first node 10 and the second node 20.

That is, the first node 10 and the second node 20 can communicate with each other using a routing protocol.

The first node 10 and the second node 20 can communicate with each other via the communication channel 50. [

The communication channel 50 may be a communication period in which communication is performed according to the routing protocol, and network setting or data transmission / reception between the first node 10 and the second node 20 may be performed.

The system 100 having a network structure in which the first node 10 and the second node 20 communicate with each other via the communication channel 50 is configured to perform communication using a broadcast method using the OSPF routing protocol Satellite network system.

That is, the first node 10 and the second node 20 in the system 100 may be referred to as routers that communicate using the OSPF routing protocol in the broadcast mode.

The first node 10 and the second node 20 may each have a communication role depending on the configuration of the system 100. For example, The second node 20 may be a node configured to perform a role of a master among the plurality of nodes corresponding to the satellites of the first node 10 and the second node 20, .

That is, the second node 20 may be a node acting as a DR (Designated Router) in the system 100 that communicates in a broadcast (or multicast) manner using the OSPF routing protocol.

In the system 100, the first node 10 may be one or more, and the second node 20 may also be one or more.

Hereinafter, an embodiment of the system 100 will be described in detail with reference to an embodiment in which the number of the first node 10 is one or more and the number of the second node 20 is one.

Wherein the one or more first nodes 10 in the system 100 generate first information and transmit the first information to the second node 20 and the second node 20 transmits the first information to the one or more first nodes 10, 10), and transmits the generated second information to the entire one or more first nodes (10).

That is, as shown in FIG. 2, at least one node 10a of the at least one first node 10 generates the first information and transmits the first information to the second node 20 (①) The second node 20 generates the second information based on the first information received from the at least one node 10a of the one or more first nodes 10 and transmits the generated second information to the one or more (②) to the entire first node 10 (10a, 10b, 10c, ..., 10x).

Wherein the one or more first nodes 10 in the system 100 generate and transmit the first information to the second node 20 and the second node 20 generates the second information Wherein the second node is configured to transmit data to at least one of the at least one first node and at least one of the first node and the second node in a period of the communication channel, And transmits the second information to the one or more first nodes (10) through a dedicated section.

The transmission structure of the first information and the second information of the system 100 may be as shown in FIG.

Here, the packet-dedicated section 51 means a channel of a dedicated section in which the second information among the communication channels 50 is transmitted to the entire one or more first nodes 10.

That is, in the system 100, the second node 20 may be configured such that the packet-dedicated section 51, which is a dedicated section of the second information, is designated in advance, 2 information to the one or more first nodes 10.

The setting of the packet-dedicated period 51 may be predefined according to the network configuration of the system 100. [

The one or more first node 10 and the second node 20 can transmit and receive data to each other through a section 52 of the communication channel 50 excluding the packet exclusive section 51 .

That is, the first information may be transmitted to the second node 20 through a section 52 excluding the packet-dedicated section 51 of the communication channel 50, May be transmitted to the entire first node (10) through the packet-dedicated section (51).

Each of the one or more first nodes 10 may be allocated a predetermined period of a section of the communication channel 50 to transmit and receive data to and from the second node 20 through the assigned channel.

That is, each of the one or more first nodes 10 is allocated a section for transmitting / receiving data with the second node 20 of the communication channel 50, 20 to transmit and receive data.

The first information may be information on the communication network status of each of the one or more first nodes 10 corresponding to the router in the system 100.

The first information may be information about a state of a communication network for the OSPF routing protocol communication of each of the one or more first nodes (10).

Such as setting, adding, changing, or information about the communication status including the communication address.

The first information may be routing update information generated at each of the one or more first nodes (10).

When the one or more first nodes 10 transmit the first information to the second node 20 via the communication channel 50, the first node 10 transmits the first information in a unicast communication manner .

That is, the one or more first nodes 10 may transmit the first information to the second node 20 using the unicast communication method.

The second information may be information on the communication network status of the second node 20 corresponding to the DR in the system 100. [

The second information may be information on the communication network status of the entire system 100 generated according to the first information.

The second information may be information on a state of a communication network that has collected the first information received from at least one of the one or more first nodes (10).

That is, the second node 20 may collect the first information received from at least one of the one or more first nodes 10 to generate the second information.

The second information may comprise information about establishing a communication relationship between the one or more first node 10 and the second node 20, depending on the communication network conditions of the system 100. [

That is, the second information may be information for setting the communication relationship of the system 100. [

The second information may be routing update information in which the first information generated at each of the one or more first nodes (10) is collected.

The second information may be information in the form of a packet.

When the second node 20 transmits the second information through the communication channel 50 to the entire one or more first nodes 10 (10a to 10x), the second information is transmitted in a broadcast communication manner May be transmitted.

That is, the second node 20 can transmit the second information to the entire one or more first nodes 10 by the broadcast communication method.

The one or more first nodes 10 may transmit the first information through the unicast communication method through the section 52 excluding the packet dedicated section 51 set in the communication channel 50, To the second node (20), and the second node (20) transmits the second information to the one or more first nodes (10 As shown in FIG.

That is, the system 100 may be configured such that in the communication channel 50 in which data is exchanged between the at least one first node 10 and the second node 20, the second information is transmitted in the broadcast mode The packet-dedicated section 51, which is a channel section, is preliminarily designated, and communication relation setting, i.e., routing update, may be performed according to the state of the communication network through the packet-

In other words, the system 100 is configured such that the routing update information (second information) for establishing a communication relationship according to the communication network state transmitted in the broadcast manner is smoothly transmitted to a plurality of nodes (one or more first nodes) A dedicated transmission channel (packet-dedicated section) of routing update information (second information) transmitted to a plurality of nodes (at least one first node) in the satellite network in a broadcast manner so as to be transmitted, (Second information) through a channel (a packet-dedicated section) to the plurality of nodes (at least one first node) in the satellite network in the broadcast manner.

As shown in FIG. 4, the packet-dedicated period 51 is a period during which the interval of the communication channel 50 is shifted from the designated range (x '- y') to the intermediate value (x '/ 2, y' / 2) Can be specified including the corresponding interval.

For example, if the interval of the communication channel 50 is represented by a designated range of a time interval of the x-axis and a frequency range of the y-axis, the packet-dedicated interval is 51, x '/ 2) and an intermediate value (y' / 2) of the y-axis.

That is, the packet-dedicated section 51 may be a channel section corresponding to an intermediate region in the communication channel 50.

The packet-dedicated section 51 may be designated as a section of a specific range based on the intermediate value.

For example, an interval of a specific range based on the intermediate value (x '/ 2, y' / 2) may be designated as the packet exclusive section 51.

In a further embodiment of the system 100, the second information comprises communication packet information 21 for establishing a communication relationship between the at least one first node 10 and the second node 20, (21 ') for controlling transmission of the control packet (21).

The communication packet information 21 may include communication address information of each of the one or more first node 10 and the second node 20, such as IP address information and its setting information.

An example of the structure of the communication packet information 21 according to the satellite network system using the OSPF protocol may be as shown in FIG.

As shown in FIG. 4, the communication packet information 21 includes an IP layer (OSPF Hello Packet), a Hello Packet Body, an OSPF Header, an IP Header, the control packet information 21 '(Satellite Routing Control Unit) (Media Access Control) address information.

The control packet information 21 'includes a media access control (MAC) address corresponding to the communication address information based on the communication address information of the one or more first nodes 10 included in the communication packet information 21, Address information, and control transmission of the communication packet information 21 'according to the analyzed MAC address information.

An example in which the system 100 described above is applied to a satellite network system using the OSPF protocol will be described with reference to FIGS. 3 and 5. FIG.

5, the system 100 specifies a timeslot section 51 for a hello packet representing traffic that occurs during the OSPF routing protocol operation in the data traffic channel 50, So that it can be managed. In addition, a routing control unit 21 '(Satellite Routing Control Unit) in the time slot period 51 is set so that a cost metric can be set to be cost metric compatible with the OSPF protocol from the MAC to the IP. In addition, it can instruct MAC to perform NCC-centered efficient routing of information from IP to MAC.

The routing update procedure using the DR 20 in the satellite network of the system 100 may be as shown in FIG. 3, the terminal 20, which is the center in the satellite network 100 performs the DR, and in FIG. 3, the routing update (1), which is transmitted from the satellite terminal 10 to the central terminal 20, . In FIG. 3, (2) represents the process of propagating the collected routing information to the satellite terminal 10 in the satellite network 100 through Multicast.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

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, Modification is possible. Accordingly, the spirit of the present invention should be understood only in accordance with the following claims, and all equivalents or equivalent variations thereof are included in the scope of the present invention.

10 (10a to 10x): a first node
20: second node 21: communication packet information
21 ': control packet information
50: communication channel 51: packet-dedicated section
100: Satellite network system

Claims (10)

At least one first node for generating and transmitting first information to a second node; And
And the second node generating second information based on the first information received from at least one of the one or more first nodes and transmitting the generated second information to all of the one or more first nodes and,
Wherein the second node comprises:
Wherein the second node transmits the second information to the one or more first nodes through a designated packet exclusive period in a section of a communication channel for transmitting and receiving data with the at least one first node. The method according to claim 1,
The at least one first node and the second node,
Wherein an Open Shortest Path First (OSPF) routing protocol is applied. The method according to claim 1,
The at least one first node and the second node,
And transmits and receives data to and from each other over a period of the communication channel except for the packet exclusive period. The method of claim 3,
Wherein each of the one or more first nodes comprises:
Wherein a predetermined period of the communication channel is allocated to transmit and receive data to and from the second node through the assigned channel. The method according to claim 1,
Wherein the first node comprises:
And transmits the first information to the second node by a unicast communication method. The method according to claim 1,
Wherein the second node comprises:
And transmits the second information to all the one or more first nodes through a broadcast communication method. The method according to claim 1,
The packet-
Wherein the communication channel is designated to include an interval corresponding to an intermediate value in a designated range. 8. The method of claim 7,
The packet-
And a predetermined range of intervals based on the intermediate value. The method according to claim 1,
Wherein the second information comprises:
And communication packet information for establishing a communication relationship between the at least one first node and the second node and control packet information for controlling transmission of the communication packet information. 8. The method of claim 7,
The control packet information includes:
(MAC) address information corresponding to the communication address information based on the communication address information of the at least one first node included in the communication packet information, And controls the transmission of the packet information.

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