KR20220115505A - System and method for managing wireless channels in a distributed manner in internet of things network - Google Patents

Abstract

Disclosed are a system for managing wireless channels in a distributed manner of Internet of things (IoT) network and a method thereof. A method for managing wireless channels comprises the steps of: comparing a network layer of a transmitting node and a network layer of a receiving node; setting a channel by referring to an available channel list of the transmitting node when the network layer of the transmitting node is higher than the network layer of the receiving node; and setting a channel by referring to an available channel list of the receiving node when the network layer of the receiving node is higher than the network layer of the transmitting node.

Description

Distributed wireless channel management system and method for IoT network

The present invention relates to a distributed method wireless channel management system of an IoT network and a method therefor. More specifically, the present invention relates to a system and method for managing a channel in a distributed manner by reflecting regionally different channel conditions on a wireless network.

An Internet of Things (IoT) wireless network system performs communication by setting a plurality of channel widths in an unlicensed band section in using a channel for wireless communication. In this case, the IoT wireless network system may transmit/receive data over the network by selecting the best channel in the initial network formation process.

However, in the conventional IoT wireless network system, a method for solving a channel interference signal according to the use of a single channel in channel selection and operation has been limited. In addition, in the wireless communication technology that selects and operates multi-channels, since the entire network available channels are selected from the center, local channel state information cannot be reflected, channel resources are wasted, and channel management difficulties exist.

Accordingly, there is a demand for a method for efficiently managing a channel by reflecting regional channel state information.

The present invention can provide a system and method using a distributed method in which all communication nodes existing on a wireless network periodically collect surrounding channel information to create and manage a regional channel list.

A method for managing a radio channel according to an embodiment of the present invention comprises: comparing a network layer of a transmitting node with a network layer of a receiving node; setting a channel by referring to an available channel list of the transmitting node when the network layer of the transmitting node is higher than the network layer of the receiving node; and when the network layer of the receiving node is higher than that of the transmitting node, setting a channel by referring to an available channel list of the receiving node.

The radio channel management method according to an embodiment of the present invention may further include the step of transmitting, by the transmitting node, information to the receiving node using the channel.

A method for managing a radio channel according to an embodiment of the present invention includes: collecting, by the transmitting node, channel information within a predetermined distance from the transmitting node; generating a list of available channels of the transmitting node based on the channel information collected by the transmitting node; and outputting, by the transmitting node, an available channel list of the transmitting node to other nodes including the receiving node.

A method for managing a radio channel according to an embodiment of the present invention includes: collecting, by the receiving node, channel information within a predetermined distance from the receiving node; generating a list of available channels of the receiving node based on the channel information collected by the receiving node; and outputting, by the receiving node, an available channel list of the receiving node to other nodes including the transmitting node.

A wireless channel management system according to an embodiment of the present invention includes a plurality of communication nodes, and each of the communication nodes compares the network layer of the communication node and the network layer of the reception node when operating as a transmission node, When the network layer of the communication node is higher than the network layer of the receiving node, a channel is established by referring to the list of available channels of the communication node. When the network layer of the receiving node is higher than the network layer of the transmitting node, the availability of the receiving node You can set the channel by referring to the channel list.

Communication nodes of the wireless channel management system according to an embodiment of the present invention may transmit information to a receiving node using the channel.

Communication nodes of the wireless channel management system according to an embodiment of the present invention collect channel information within a predetermined distance from the communication node, generate a list of available channels of the communication node based on the collected channel information, and the communication node A list of available channels of can be output to other nodes including the receiving node.

According to an embodiment of the present invention, by using a distributed method in which all communication nodes existing on a wireless network periodically collect surrounding channel information to create and manage a regional channel list, an efficient channel by reflecting real-time channel information Resource management may be possible.

1 is a diagram illustrating a distributed method wireless channel management system of an IoT network according to an embodiment of the present invention.
2 is a diagram illustrating a structure of a node included in a distributed wireless channel management system of an IoT network according to an embodiment of the present invention.
3 is an example of a process of setting a channel according to an embodiment of the present invention.
4 is a flowchart illustrating a distributed method wireless channel management method of an IoT network according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The distributed method wireless channel management method of an IoT network according to an embodiment of the present invention may be performed by a distributed method wireless channel management system of the IoT network.

1 is a diagram illustrating a distributed method wireless channel management system of an IoT network according to an embodiment of the present invention.

As shown in FIG. 1, the distributed wireless channel management system of the IoT network is a multi-hop wireless network having a network expansion topology structure through multiple hops via an intermediate router terminal for data transmission. can

Accordingly, the distributed wireless channel management system of the IoT network may be configured with a plurality of communication nodes 100 as shown in FIG. 1 . In addition, each of the communication nodes 100 may generate a real-time WCL by analyzing channel information around itself. Specifically, each of the communication nodes 100 may generate a white channel list (WCL) by collecting channel information within its coverage. In addition, each of the communication nodes may transmit the WCL generated by itself to the other nodes 110 , 120 , 130 , and 140 . For example, each of the communication nodes may transmit its WCL to the other nodes 110 , 120 , 130 , 140 using a frame that is periodically transmitted including network information such as a beacon frame. .

At this time, the other nodes 110 , 120 , 130 , and 140 that have received the WCL decide a channel to use for transmitting information to the communication node 100 in consideration of the network layer information of the communication node 100 that has transmitted the WCL. can

Also, the interference channel may be a channel section in which wireless transmission is difficult due to a strong interference signal.

In addition, the distributed wireless channel management system of the IoT network provides a channel scan function that searches for the state of a plurality of separated channel signals and a time synchronization function that synchronizes all terminals on the wireless network with the AP time. may include

Black Channel List (BCL) : List of excluded channels

In addition, the distributed wireless channel management system of the IoT network may manage the channel using the parameters shown in Table 1.

The distributed method wireless channel management system of the IoT network uses a distributed method in which all communication nodes on the wireless network periodically collect surrounding channel information to create and manage a regional channel list. Channel resource management may be possible.

2 is a diagram illustrating a structure of a node included in a distributed method wireless channel management system of an IoT network according to an embodiment of the present invention.

The node 200 of the distributed wireless channel management system of the IoT network may operate as a transmitting node or a receiving node. Also, the node 200 may include an information collection unit 210 , a processor 220 , and an output unit 230 as shown in FIG. 2 .

The information collection unit 210 may collect channel information within a predetermined distance from the node 200 . For example, the predetermined distance may be the coverage of the node 200 .

The processor 220 may generate a list of available channels of the node 200 based on the channel information collected by the information collecting unit 210 .

The output unit 230 may output the available channel list of the node 200 to other nodes. For example, the output unit 230 may use a beacon signal to output a list of available channels of the node 200 .

Also, the processor 220 may check whether the node 200 operates as a transmission node. And, when the node 200 operates as a transmission node, the processor 220 may compare the network layer of the node 200 with the network layer of the reception node.

When the network layer of the node 200 is higher than the network layer of the receiving node, the processor 220 may establish a channel by referring to the list of available channels of the node 200 .

In addition, when the network layer of the receiving node is higher than the network layer of the node 200 , the processor 220 may set a channel by referring to the list of available channels of the receiving node.

In this case, the output unit 230 may transmit information to the receiving node using the channel set by the processor 220 .

3 is an example of a process of establishing a channel by a distributed method wireless channel management system of an IoT network including a node 310 , a node 320 , a node 330 , a node 340 , and a node 350 .

The node 310 , the node 320 , and the node 330 may periodically collect channel information around themselves to generate WCL-1, WCL-2, and WCL-2, which are available channel lists.

In this case, WCL-1, which is the list of available channels of the node 310, may be {3,4,5}, and WCL-2, which is the list of available channels of the node 320, may be {1,2,6}.

When the node 340 and the node 350 that have received WCL-2 want to transmit information to the node 320, the network layer value of the node 320 that will operate as the receiving node is the node ( 340 ) and the network layer value of the node 350 , the node 340 and the node 350 may calculate a channel value in the allocated time slot using WCL-2.

That is, when the node 340 transmits information to the node 320 using the channel lease value of length 3 consisting of ch 1, 2, and 6, it is allocated to the first slot, and may have a value of 1%3 = 1. have. Accordingly, the node 340 may transmit information to the node 320 by setting a channel according to the first channel value ch1 of the node 320 .

4 is a flowchart illustrating a distributed method wireless channel management method of an IoT network according to an embodiment of the present invention.

In step 410 , the node 200 may collect channel information within a predetermined distance from the node 200 .

In operation 420 , the node 200 may generate an available channel list (WCL) of the node 200 based on the channel information collected in operation 410 .

In step 430 , the node 200 may output the available channel list (WCL) of the node 200 generated in step 420 to other nodes included in the distributed wireless channel management system of the IoT network.

In step 440 , the node 200 may determine whether information transmission to another node is required. When the node 200 operates as a transmitting node, the node 200 determines that information transmission to another node is necessary and may perform step 450 . In addition, when the node 200 operates as a receiving node or does not perform a separate operation, the node 200 periodically repeats steps 410 to 440 until it operates as a transmitting node. have.

In step 450 , the node 200 compares the network layer of the node 200 with the network layer of the receiving node to receive the information to determine whether the network layer of the receiving node is higher than or equal to the network layer of the node 200 . . When the network layer of the receiving node is equal to or greater than that of the node 200 , the node 200 may perform step 460 . Also, when the network layer of the receiving node is less than the network layer of the node 200 , the node 200 may perform step 470 .

In step 460 , the node 200 may set a channel by referring to the list of available channels of the receiving node.

In step 470 , the node 200 may set a channel by referring to the list of available channels of the node 200 .

In step 480 , the node 200 may transmit information to the receiving node using the channel set in step 460 or 470 .

The present invention uses a distributed method in which all communication nodes existing on a wireless network periodically collect surrounding channel information to create and manage a regional channel list, thereby enabling efficient channel resource management by reflecting real-time channel information. .

Meanwhile, the method according to the present invention is written as a program that can be executed on a computer and can be implemented in various recording media such as magnetic storage media, optical reading media, and digital storage media.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations may be implemented for processing by, or for controlling the operation of, a data processing device, eg, a programmable processor, computer, or number of computers, a computer program product, ie an information carrier, eg, a machine readable storage It may be embodied as a computer program tangibly embodied in an apparatus (computer readable medium) or a radio signal. A computer program, such as the computer program(s) described above, may be written in any form of programming language, including compiled or interpreted languages, and may be written as a standalone program or in a module, component, subroutine, or computing environment. may be deployed in any form, including as other units suitable for use in A computer program may be deployed to be processed on one computer or multiple computers at one site or to be distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from either read-only memory or random access memory or both. Elements of a computer may include at least one processor that executes instructions and one or more memory devices that store instructions and data. In general, a computer may include one or more mass storage devices for storing data, for example magnetic, magneto-optical disks, or optical disks, receiving data from, sending data to, or both. may be combined to become Information carriers suitable for embodying computer program instructions and data are, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tapes, Compact Disk Read Only Memory (CD-ROM). ), an optical recording medium such as a DVD (Digital Video Disk), a magneto-optical medium such as a floppy disk, a ROM (Read Only Memory), a RAM , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and the like. Processors and memories may be supplemented by, or included in, special purpose logic circuitry.

In addition, the computer-readable medium may be any available medium that can be accessed by a computer, and may include both computer storage media and transmission media.

While this specification contains numerous specific implementation details, these are not to be construed as limitations on the scope of any invention or claim, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. should be understood Certain features that are described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Furthermore, although features operate in a particular combination and may be initially depicted as claimed as such, one or more features from a claimed combination may in some cases be excluded from the combination, the claimed combination being a sub-combination. or a variant of a sub-combination.

Likewise, although acts are depicted in the figures in a particular order, it should not be construed that all acts shown must be performed or that such acts must be performed in the specific order or sequential order shown to achieve desirable results. In certain cases, multitasking and parallel processing may be advantageous. Further, the separation of the various device components of the above-described embodiments should not be construed as requiring such separation in all embodiments, and the program components and devices described may generally be integrated together into a single software product or packaged into multiple software products. You have to understand that you can.

On the other hand, the embodiments of the present invention disclosed in the present specification and drawings are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

200: node
210: information collection unit
220: processor
230: output unit

Claims (1)

comparing the network layer of the sending node and the network layer of the receiving node;
setting a channel by referring to an available channel list of the transmitting node when the network layer of the transmitting node is higher than the network layer of the receiving node; and
When the network layer of the receiving node is higher than the network layer of the transmitting node, establishing a channel by referring to an available channel list of the receiving node
A wireless channel management method comprising a.

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