KR20130059155A - Method for changing operation parameter of sensor node - Google Patents

Method for changing operation parameter of sensor node Download PDF

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Publication number
KR20130059155A
KR20130059155A KR1020110125321A KR20110125321A KR20130059155A KR 20130059155 A KR20130059155 A KR 20130059155A KR 1020110125321 A KR1020110125321 A KR 1020110125321A KR 20110125321 A KR20110125321 A KR 20110125321A KR 20130059155 A KR20130059155 A KR 20130059155A
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KR
South Korea
Prior art keywords
sensor
node
sensor nodes
change
sink node
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Application number
KR1020110125321A
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Korean (ko)
Inventor
정훈
김관중
김내수
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한국전자통신연구원
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Priority to KR1020110125321A priority Critical patent/KR20130059155A/en
Publication of KR20130059155A publication Critical patent/KR20130059155A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/02—Topology update or discovery
    • H04L45/08—Learning-based routing, e.g. using neural networks or artificial intelligence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00—Routing or path finding of packets in data switching networks
    • H04L45/70—Routing based on monitoring results
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
    • H04W40/18—Communication route or path selection, e.g. power-based or shortest path routing based on predicted events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Artificial Intelligence (AREA)
  • Evolutionary Computation (AREA)
  • Medical Informatics (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: An operation parameter conversion method of a sensor node is provided to stably convert the operation parameter information such as the transmission speed or the frequency channel of sensor node. CONSTITUTION: A sink node(Sa) collects a routing path from a plurality of sensor nodes to the sink node(S230). The sink node determines the operation parameter of the sensor nodes based on the number used in each routing path of the sensor nodes(S240). The sink node converts the operation parameter of the sensor nodes according to the operation parameter conversion order. [Reference numerals] (S230) Collect a routing path; (S240) Determine the conversion number of operating parameters

Description

How to change the operating parameter of a sensor node {METHOD FOR CHANGING OPERATION PARAMETER OF SENSOR NODE}

The present invention relates to a method of changing operating parameters of a sensor node.

The sensor network built on the IEEE 802.15.4 standard performs wireless communication using the 2.4 GHz band and the ISM (Industrial Science and Medical) band below 1 GHz. The ISM band is a frequency band used simultaneously by various services such as a wireless telephone and a wireless LAN, rather than a separately designated frequency band for one wireless communication. Therefore, when another service occupies the corresponding frequency and uses the frequency band, there is a problem that the quality of communication is degraded when the sensor network uses the frequency band.

Recently, in order to solve such a problem, ZigBee Alliance, which is based on the IEEE 802.15.4 standard, has been researching methods of changing the channel by identifying the state of the channel used by the sensor node. However, studies on the need to change the frequency are ongoing, but do not provide a specific method for how to perform the frequency change operation in the actual sensor network.

In addition, when the sensor network uses a band below 1 GHz, various data rates such as 20 kbps, 40 kbps, 100 kbps and 250 kbps can be selected and used. These various transmission rates are set to be used at the initial setting. Since these different transmission rates have a communication capability in different wireless sections according to the transmission rate, it is necessary to change the transmission rate in some cases, but it is not considered to change the transmission rate during operation.

Information such as the frequency channel or wireless transmission speed of the sensor node is an essential operating parameter for wireless communication in the sensor network. When the change of these parameters is an abnormal process, a very stable change method is required because not only the corresponding sensor node but the entire sensor network can operate.

The technical problem to be solved by the present invention is to provide a method for changing the operating parameters of the sensor node that can stably change the operating parameters of the sensor node.

According to an embodiment of the present disclosure, a method of changing a operating parameter of a plurality of sensor nodes in an area controlled by a sink node in a sensor network is provided. The operation parameter changing method may include collecting routing paths from each sensor node to the sink node from the plurality of sensor nodes, and based on the number of times used in the routing paths of the plurality of sensor nodes, operating parameters of the plurality of sensor nodes. Determining the change order, and changing the operation parameters of the plurality of sensor nodes according to the operation parameter change order.

According to an exemplary embodiment of the present invention, operating parameter information such as frequency channels and transmission speeds of sensor nodes constituting the network adaptively to a changing communication channel environment in the sensor network may be stably changed even during operation of the sensor network.

1 is a diagram illustrating a sensor network according to an exemplary embodiment of the present invention.
2 is a diagram illustrating a method of determining a change order of operating parameters of a sensor node according to an exemplary embodiment of the present invention.
3 is a diagram illustrating an example of a routing path of sensor nodes collected by a sink node according to an exemplary embodiment of the present invention.
4 is a diagram illustrating a routing path of a sensor node based on FIG. 3.
FIG. 5 is a diagram illustrating a routing path of remaining sensor nodes except for the sensor node that determines a change order of operating parameters in FIG. 3.
6 is a diagram illustrating a method of changing operating parameters of a sensor node according to an exemplary embodiment of the present invention.
7 is a diagram illustrating a node management apparatus of a sink node 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 so that those skilled in the art can easily carry out the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification and claims, when a section is referred to as "including " an element, it is understood that it does not exclude other elements, but may include other elements, unless specifically stated otherwise.

A method of changing operating parameters of a sensor node according to an embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a sensor network according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the sensor network 10 includes a sink node Sa and a plurality of sensor nodes having limited power, for example, sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh. do.

The sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh collect environment or situation information in their sensing area and transmit the collected data to the sink node Sa. The sensor nodes Sb, Sc, Sd, Se, Sf, Sg and Sh may be located one hop away from the sink node Sa or two or more hops away from the sink node Sa. Here, the distance that the power of any one sensor node (Sb) can be defined as one hop. Therefore, the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh may transmit data collected through hop communication to the sink node Sa. For example, the sensor node Sg may transmit data collected through multi-hop communication through the sensor nodes Sf and Sc to the sink node Sa.

The sink node Sa manages and controls sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh under its control in the sensor network, and each sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh) transmits the data collected to a server (not shown).

In particular, when the sink node Sa needs to change the operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh, the sink nodes Sa, Sb, Sc, Sd, Se, Sf, Sg, Controls the change of the operation parameter of Sh). The operating parameter may include a frequency channel and a transmission speed of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh.

For example, when the operating parameters of the sensor node Sf are changed first during operation in the sensor network 10, each sensor node Sb among the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh may be changed. Communication between the sensor nodes Sg and Sg and the sensor nodes Sf including the sensor node Sf in each routing path from S, Sc, Sd, Se, Sf, Sg, Sh to the sink node Sa is impossible. Can be done. Accordingly, the sink node Sa may be configured so that the entire sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh constituting the sensor network 10 in operation can be stably communicated with the sensor nodes Sb, Sc, and Sd. Determining the change order of, Se, Sf, Sg, Sh, and requesting the sensor node (Sb, Sc, Sd, Se, Sf, Sg, Sh) to change the operating parameters in accordance with the determined change order, Change the operating parameters (Sb, Sc, Sd, Se, Sf, Sg, Sh).

Next, a method of changing the operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh in the sink node Sa will be described in detail with reference to FIGS. 2 to 5.

2 is a diagram illustrating a method of determining a change order of operating parameters of a sensor node according to an exemplary embodiment of the present invention. 3 is a diagram illustrating an example of a routing path of sensor nodes collected by a sink node according to an embodiment of the present invention, and FIG. 4 is a diagram illustrating a routing path of a sensor node based on FIG. 3. FIG. 5 is a diagram illustrating a routing path of remaining sensor nodes except for the sensor node that determines the change order of operating parameters in FIG. 3.

Referring to FIG. 2, the sink node Sa is configured to change operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh in its own control network 10. Determine the order of change.

The sink node Sa is assigned to each sensor node Sb, Sc, Sd to all sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh in the sensor network 10 to determine the change order of the operating parameters. , Se, Sf, Sg, Sh) to transmit a route record request message (Route Record Request) requesting a routing path from the sink node Sa (S210).

Each sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh, which has received a route record request message from the sink node Sa, is a sink node through a route record response message. The routing path to Sa is transmitted to the sink node Sa (S220).

Meanwhile, in FIG. 2, for convenience, the sink node Sa directly transmits a route record request message to each sensor node Sb, Sc, Sd, Se, Sf, Sg, and Sh. The node Sa broadcasts a Route Record Request message to all sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh under its control in the sensor network 10. (S210). Then, the sensor node that receives the Route Record Request message, for example, the sensor node (Sb in FIG. 1), receives the Route Record Request message, and then moves to the next hop along the routing path. A route record request message is transmitted to a sensor node, for example, a sensor node (Sc in FIG. 1). Through this hop communication, a route record request message may be transmitted to all sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh.

In addition, a route record response message of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh may also be delivered to the sink node Sa through hop communication.

The sink node Sa is a sensor node Sb, Sc, Sd, Se, Sf through a route record response message from each sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh. , Sg, Sh) to collect the routing path (S230).

After the sink node Sa collects the routing paths of all the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh, the sink node Sa is based on the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh. The change order of) is determined (S240). The sink node Sa determines to change the operating parameter from the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh not included in their routing paths. Next, the sink node Sa determines sensor nodes that are not included in their routing paths among the sensor nodes that do not determine the change order of the operating parameters in the next order of changing the operating parameters. In this manner, the sink node Sa may determine the change order of the operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh.

For example, when the routing paths of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg and Sh collected by the sink node Sa are as shown in FIG. 3, the sensor node Sb to the sink node Sa is shown. , Sc, Sd, Se, Sf, Sg, Sh) may be represented as shown in FIG. That is, the sink node Sa is based on the routing path of each sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh, and each sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh. You can check the sensor nodes included in the routing path. 3 and 4, it can be seen that the sensor nodes Sb, Sc, Sd, Se, Sf, Sg and Sh that are not included in their routing paths are sensor nodes Se, Sf and Sh. have. The sink node Sa determines the change order of the sensor nodes Se, Sf, and Sh as the first rank. Next, the routing path of the sensor node that does not determine the change order of the operating parameters is shown in FIG. Referring to the routing path shown in FIG. 5, it can be seen that the sensor nodes not included in their routing paths are sensor nodes Sg among the sensor nodes that do not determine the change order of operating parameters. The sink node Sa determines the change order of the sensor node Sg as the second rank. In this manner, the sink node Sa may determine the order of change of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh in the sensor network 10.

In this way, after determining the change order of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh in the sensor network 10, the sink node Sa performs the sensor node Sb, according to the determined change order. Change the operating parameters (Sc, Sd, Se, Sf, Sg, Sh).

6 is a diagram illustrating a method of changing operating parameters of a sensor node according to an exemplary embodiment of the present invention.

Referring to FIG. 6, the sink node Sa determines the order of change of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh in the sensor network 10 (S600). A parameter change request message is transmitted to the sensor node S1 (S610). The parameter change request message may include a parameter to change and a parameter value to change.

Upon receiving the parameter change request message from the sink node Sa, the first-order sensor node S1 changes the corresponding parameter (S620), and sends a parameter change response message (Parameter Change Response) to the sink node (S620). Sa) (S630).

When the sink node Sa receives a parameter change response message from the sensor node S1 of the first rank, the sink node Sa transmits a parameter change request message to the sensor node S2 of the second rank. It may be (S640).

Upon receiving the parameter change request message from the sink node Sa, the second-order sensor node S2 changes the corresponding parameter (S650), and sends a parameter change response message (Parameter Change Response) to the sink node (S). Sa) (S660).

Through this process, the sink node Sa transmits a parameter change request message to the sensor node Sn of the last rank (S670), and the sensor node Sn of the last rank changes the parameter. In operation S680, the parameter change response message is transmitted to the sink node Sa in operation S690.

In this manner, the sink node Sa may change operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh in the sensor network 10.

For example, based on the routing paths of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh shown in FIG. 3, the sensor nodes Se, Sf, Sh, sensor node Sg, and sensor The order of changing the operating parameters may be determined in order of the node Sd and the sensor nodes Sb and Sc. In this case, the sink node Sa transmits a parameter change request message to the sensor nodes Se, Sf, and Sh, and then sends a parameter change response message from the sensor nodes Se, Sf, and Sh. When the response is received, a parameter change request message is transmitted to the sensor node Sg of the next rank. Similarly, when the sink node Sa receives a parameter change response message from the sensor node Sg, the sink node Sa transmits a parameter change request message to the sensor node Sd of the next rank.

In this way, if the operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh in the sensor network 10 are changed, the sensor nodes Sb, Sc, Sd, Se, and Sf are stable during operation. , Sg, Sh) can be changed.

7 is a diagram illustrating a node management apparatus of a sink node according to an embodiment of the present invention.

Referring to FIG. 7, the node management apparatus 700 of the sink node Sa includes a parameter change determiner 710, a change order determiner 720, and a parameter changer 730.

The parameter change determination unit 710 determines the change of the operation parameter of the sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh which has jurisdiction over it. The parameter change determination unit 710 adaptively adapts to a changing communication channel environment in the sensor network 10 to operate parameters such as frequency channels and transmission speeds of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh. From this, it is determined whether the change of the operating parameters of the sensor nodes (Sb, Sc, Sd, Se, Sf, Sg, Sh) is necessary.

When the change order determination unit 720 needs to change the operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh, the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Determine the order of change of Sh). The change order determiner 720 determines the change order of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh based on the method described with reference to FIGS. That is, the change order determination unit 720 may determine each sensor node Sb, Sc, Sd, Se, Sf, from each sensor node Sb, Sc, Sd, Se, Sf, Sg, Sh to the sink node Sa. Collect the routing paths of Sg and Sh, and use the routing paths of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh. Sensor nodes Sb, Sc, Sd, Se, Sf, Sg, and Sh Determine the change order of the operation parameters.

The parameter changing unit 730 determines that the change order of the operating parameters of the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh is determined, the sensor nodes Sb, Sc, Sd, Se, Sf, Sg, Sh. Requests to change the operating parameters to each sensor node according to the change order of the operating parameters. The parameter changing unit 730 may request a change in operating parameters to a sensor node having a next rank after receiving a response to the changing of the operating parameters from the sensor node requesting to change the operating parameters.

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, It belongs to the scope of right.

Claims (1)

In a method in which a sink node in a sensor network changes operating parameters of a plurality of sensor nodes within its own jurisdiction,
Collecting routing paths from each sensor node to the sink node from the plurality of sensor nodes,
Determining an operation parameter change order of the plurality of sensor nodes based on the number of times used in the routing paths of the plurality of sensor nodes; and
Changing operation parameters of the plurality of sensor nodes according to the operation parameter change order;
Operation parameter change method comprising a.
KR1020110125321A 2011-11-28 2011-11-28 Method for changing operation parameter of sensor node KR20130059155A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200073977A (en) * 2018-12-14 2020-06-24 호서대학교 산학협력단 Underwater communication system adaptive to underwater environment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20200073977A (en) * 2018-12-14 2020-06-24 호서대학교 산학협력단 Underwater communication system adaptive to underwater environment

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