KR101983886B1 - Communication method for receiving data of sonar signal - Google Patents

Abstract

A communication method for transmitting a sonar signal reception data is provided. A communication method according to an exemplary embodiment includes a step of transmitting a reference clock from a data collection center to a node, a step of finding a transmission time point of the first data based on a clock, and a step of transmitting, To a data collection center.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a communication method,

Hereinafter, a communication method for transmitting a sonar signal reception data is provided.

A Sonar signal is transmitted through a projector to search for an arbitrary object in the water, and a reflection signal of a certain object is collected from a sensor array and transmitted to a ship. Here, the subject collecting data is not necessarily limited to a ship but may be various.

The problem here is that the sensor array is composed of more than 100 nodes (data collectors), and each node must collect signals at certain intervals and transmit them to the ship. In other words, there is a problem that the data sent from each node collide because the environment of use is underwater, a plurality of nodes must be connected in series, and the collected data must be transmitted at the same time.

In the past, the problem was solved by a method of relaying collected data. That is, the sensor array is configured and transmits the collected data from the first node to the second node using the uplink data line composed of two lines, and sends the data of the first node and the data of the second node again to the third node . In this way, it is transmitted to the ship which is the final destination.

Conventionally, a total of five lines of cables were required in order to achieve the following purpose. That is, a power line of one line, a ground of one line, a downward data line of one line, and an upward data line of two lines were required. In order to achieve the above object, a minimum number of cables connected between a ship and a plurality of nodes is required. There is a problem that the thickness of the entire cable becomes large due to the side effect of this.

According to one embodiment, there is provided a method of transmitting data to a data collecting center, comprising the steps of: transmitting a reference clock from a data collecting center to a node; finding a transmission time of the first data based on a clock; To the base station apparatus.

The communication method includes a first step of resetting the clock counter and the first link counter, a second step of transmitting a clock to the node, a third step of resetting the data slot counter, A fourth step of receiving the first data until one reference point and updating the data slot counter, a fifth step of determining whether the first reference time point of the first link counter corresponds to the second reference time, And a sixth step of transmitting the second data to the node and updating the first link counter when the reference time point corresponds to the second reference time point.

The communication method includes a first step of resetting the clock counter and the first link counter, a second step of transmitting a clock to the node, a third step of resetting the data slot counter, A fourth step of receiving the first data until one reference time and updating the data slot counter, a fifth step of determining whether the first reference time point of the first link counter corresponds to the second reference time, A second step of resetting the data slot counter when the first link counter does not correspond to the second reference time, and a fourth step of repeating the fourth and fifth steps until the first link counter corresponds to the second reference time in a fifth step .

According to one embodiment, there is provided a method of transmitting data from a data collecting center to a node, the method comprising: transmitting a reference clock from a data collecting center to a node; Dividing a transmission time point between link points, and transmitting a control signal to a node in a data collection center according to a transmission point-in-time.

The communication method includes the steps of resetting a timing clock and a time slot counter in a step of discriminating a transmission time, monitoring a timing clock transmitted from a data acquisition center by a node, monitoring a timing clock, Resetting the time slot counter if applicable, monitoring the timing clock to monitor the timing clock again if it does not correspond to the rising time point of the timing clock, collecting the first data at the rising time, When the updated time slot counter corresponds to the first link time, transmits the collected first data to the data collection center, and when the updated time slot counter does not correspond to the first link time, The slot counter is set to the time slot counter until it corresponds to the first link time And a step of updating.
Resetting the clock counter and the first link counter according to an embodiment; Transmitting a reference clock from a data acquisition center to a node; Resetting a data slot counter; The node searching for the transmission time of the first data based on the clock; Transmitting the first data collected at the node according to the transmission time point to the data collection center; Receiving the first data from the node to a first reference time point and updating the data slot counter; Determining whether the first link counter corresponds to a second reference time point; And transmitting the second data to the node and updating the first link counter if the first link counter corresponds to the second reference time point according to a result of the determining step .
Resetting the data slot counter if the first link counter does not correspond to the second reference time point according to a result of the determining step; And repeating the step of sequentially updating the data slot counter until the first link counter corresponds to the second reference time in the fifth step.
According to one aspect, the method includes transmitting a reference clock from a data acquisition center to a node; Resetting a time slot counter and a timing clock transmitted from the data acquisition center; The node monitoring a timing clock; Resetting the time slot counter if the timing clock corresponds to a rising time, and collecting first data by the node; Updating the timeslot counter; When the time slot counter to be updated corresponds to a first link time point at which the first data is transmitted from the node to the data collection center, the node transmits the first data to the data collection center, Dividing a transmission time point from a time point at which the second data link is transmitted from the data collection center to the node by repeating the step of updating the time slot counter until the time slot counter is updated; And transmitting the control signal from the data collection center to the node according to the transmission time point.
According to another aspect of the present invention, the method further includes monitoring the timing clock again until the timing clock does not correspond to the rising time point.
According to another aspect of the present invention, there is provided a method of operating a data receiving center for communicating with a node, the method comprising: initializing a system and generating a clock; Resetting the clock counter and the first link counter; Transmitting a reference clock to the node; Updating a first link counter and a clock counter; Resetting a data slot counter; Receiving first data from the node to a first reference time point to find a transmission time point of the first data based on the clock; Updating the data slot counter; And determining whether a first reference time point of the first link counter corresponds to the second reference time point, and if it is determined that the first reference time point corresponds to the second reference time point, transmitting the second data to the node, And resetting the data slot counter and repeating the step of receiving the first data sequentially.

1 is a diagram illustrating a configuration of a node according to an embodiment.
2 is a diagram illustrating an overall system of a communication method according to an embodiment.
FIGS. 3 and 4 are diagrams illustrating signal transmission / reception timings in a communication method according to an exemplary embodiment.
5 is a flowchart illustrating a data collecting process of a data collecting center according to an embodiment of the present invention.
6 is a flowchart illustrating a process of distinguishing transmission time points between a data acquisition center and a node according to an embodiment.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

Various modifications may be made to the embodiments described below. It is to be understood that the embodiments described below are not intended to limit the embodiments, but include all modifications, equivalents, and alternatives to them.

The terms used in the examples are used only to illustrate specific embodiments and are not intended to limit the embodiments. The singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this embodiment belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

In the following description of the present invention with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. In the following description of the embodiments, a detailed description of related arts will be omitted if it is determined that the gist of the embodiments may be unnecessarily blurred.

1 is a diagram illustrating a configuration of a node according to an embodiment.

1, the node 100 includes a power supply unit 110, a sensor unit 150, an analog / digital conversion unit 140, a digital A communication unit 130, and a power line communication unit 120. Here, the sensor unit 150 may be a hydrophone or an acoustic receiving sensor, or may include a sensor for sensing a depth, a water temperature, and a direction other than the acoustic sensor.

2 is a diagram illustrating an overall system of a communication method according to an embodiment.

Two cables are connected between the data acquisition center 240 and the node 230. That is, only two power lines and two ground lines are connected. The power supply line supplies DC power to the node 230 at the data collection center 240 and allows the data collection center 240 to transmit the command to the node 230, To the center (240). The ground line may serve as a ground line.

A method of communicating between the data collection center 240 and the node 230 according to one embodiment will be described in more detail below.

The communication method transmitted from the node 230 to the data collection center 240 includes transmitting the reference clock from the data collection center 240 to the node 230 on the power line, Resetting the self timer. At this time, each node 230 may be aware of the assigned data transmission sequence number.

The communication method transmitted from the node 230 to the data collection center 240 includes a step of collecting sensor data from each node and a step of collecting sensor data from each node 230 based on a clock sent from the data collection center 240 230), and transmitting the collected data to the data collection center (240) according to the transmission time of each node (230).

The communication method transmitted from the data collection center 240 to the node 230 includes a step in which the data collection center 240 loads the reference clock on the power line to the node 230 and the node 230 receives the clock Resetting the self timer. At this time, a first link time point from the data collection center 240 to the node 230 to send the first data from the node 230 to the data collection center 240 is transferred from the data collection center 240 to the node 230 And the second link time point for sending the second data may be distinguished.

The data collection center 240 may transmit the second data to the node 230 at the second link time. Node 230 may receive data at a first link time.

FIGS. 3 and 4 are diagrams illustrating signal transmission / reception timings in a communication method according to an exemplary embodiment.

For example, the timing of signal transmission and reception in the communication method will be described more practically.

Referring to FIG. 3, assuming that the sensor collection period is 4KHz, that is, 4000 times per second, and that the number of nodes is 200 and the number of data bits collected in the sensor node is 48 bits, A method in which the data collection center collects data from a plurality of nodes will be described.

The data acquisition center may send a 4 KHz clock 310 to the power line 320. The node may reset its own timer based on the clock 310. < RTI ID = 0.0 > A node can read its number (or sequence number, ID, etc.) through the memory or dip switch stored on the board. The number (or sequence number, ID, etc.) can be given as a unique number that distinguishes it from other nodes.

The node can then collect 48 bits of data. The node can operate a timer based on the received clock 310 to determine its own slot indicating a transmission position or a transmission timing. It is possible to transmit 48 bits of data collected in its own slot. In this case, the transmission time points between the nodes are classified according to the order (or number, ID, etc.) assigned to each node and may not overlap with each other.

A communication method according to one embodiment may include a ground line 330.

Referring to FIG. 4, the algorithm 340 between clock 310 of FIG. 3 is shown in more detail.

4, a communication method according to one embodiment may include a slot 440 assigned to a plurality of nodes between clocks 430. In one embodiment,

As a practical example, the communication method will be described in detail below with the condition that the slot 440 corresponds to 480 nsec.

According to one embodiment, when the number of nodes is 200 and the number of bits allocated to the node is 48 bits, the time allocated to the first link 410 is 0.096 msec and the time allocated to the second link 420 is 0.0154 msec , This value can be changed according to the number of nodes. It can also be changed according to the number of bits of data collected at each node.

A method in which the data collection center transmits the second data to a plurality of nodes under the above conditions is as follows. The data acquisition center can send a 4KHz clock 430 to the power line. The node may reset its own timer based on clock 430. [ A node can read its number (or sequence number, ID, etc.) through the memory or dip switch stored on the board. In this case, the number (or sequence number, ID, etc.) may be a unique number that is distinguishable from other nodes.

The communication method then operates the timer based on the received clock 430 to determine its own slot 440 indicating the transmission or transmission time. The node can grasp the starting point of the second link 420 through its own timer and collect data at the starting point of the second link 420. [

5 is a flowchart illustrating a data collecting process of a data collecting center according to an embodiment of the present invention.

The counter of the data acquisition center may operate independently of the clock counter, the first link counter, and the data slot counter. The clock counter represents a clock transmitted from the data acquisition center to the node, the first link counter is a counter for determining the first data transmission time point, and the data slot counter determines the timing at which the node transmits data to the data collection center It is a counter.

Referring to FIG. 5, the data acquisition process of the data acquisition center includes transmitting a reference clock signal, which includes generating 510 a system initialization and clock, resetting a clock counter and a first link counter 520, And transmitting a clock to the node (533).

Step 536 of updating the first link counter in parallel with step 533 and step 539 of updating the clock counter may be performed together.

Subsequently, step 540 of resetting the data slot counter and step 556 of receiving the first data from the node to the first reference time point may be included.

Step 553 of updating the data slot counter in parallel with step 556 may be performed together.

Next, it may include determining 560 whether or not the first link counter corresponds to a second reference time point. At this time, the description will be made according to the result of the discrimination step of step 560.

If the first link counter corresponds to a second reference time point, then proceed to step 570 of updating the first link counter and step 580 of transmitting the second data to the node.

Then, it may proceed to a step 590 of confirming whether the clock counter corresponds to the third reference time point. If it is the third reference time point, it can proceed to step 595 to confirm whether it is a termination condition. If the termination condition is satisfied in step 595, the process is terminated. If the termination condition is not satisfied, the process may be repeated from step 520.

If the first link counter does not correspond to the second reference time point, the step of resetting the data slot counter is proceeded. In step 560, steps 553 and 553 are performed until the first link counter corresponds to the second reference time point. (Step 560).

6 is a flowchart illustrating a process of distinguishing transmission time points between a data acquisition center and a node according to an embodiment.

The node counter may operate with a timeslot counter that causes each node to look up the assigned transmission slot.

The step of distinguishing a transmission time point between a first link time point at which the first data is transmitted from the node to the data collection center and a second link time point at which the second data is transmitted to the node at the data collection center is reset by resetting the timing clock and time slot counter Step 610, and the step of monitoring (626) the timing clock transmitted by the node from the data acquisition center.

Then, a step 640 of monitoring the timing clock to determine whether it corresponds to the rising timing of the timing clock can be performed. We will explain it by dividing it according to the result of the corresponding point at the time of rise.

If it is determined in step 640 that the time point is the rising time point, the time slot counter is reset in step 650. If the timing clock does not correspond to the rising time point of the timing clock in step 640, (Step 626). ≪ / RTI >

If it is the rising time in step 640, following step 650, at the rising time, the node may proceed to step 623 of collecting the first data.

Subsequent to step 623, step 630 may be performed to determine if the termination condition is met. If the termination condition is met, termination may be terminated. Otherwise, step 623 may be performed.

In parallel with step 623, proceed to step 660 of updating the timeslot counter to proceed to step 670 of determining whether the updated timeslot counter corresponds to the first link time point.

If the time slot counter updated in step 670 corresponds to the first link time, the node may proceed to transmit the collected first data to the data collection center (step 680) If the time slot counter does not correspond to the link time, the time slot counter may be updated until the time slot counter corresponds to the first link time (660).

When step 623 and step 630 are completed, step 690 is performed to determine whether the termination condition is satisfied. If the termination condition is satisfied, the process is terminated. If the termination condition is not satisfied, The same process can be repeatedly performed from step 626.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented within a computer system, such as, for example, a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable array (FPA) A programmable logic unit (PLU), a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute one or more software applications that are executed on an operating system (OS) and an operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on the medium may be those specially designed and constructed for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

Although the embodiments have been described with reference to the drawings, various technical modifications and variations may be applied to those skilled in the art. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (5)

The data acquisition center resetting the clock counter and the first link counter;
The data acquisition center transmitting a reference clock to a node;
Resetting a data slot counter by the data acquisition center;
Searching for a transmission time point of the first data based on the clock using the internal timer and the memory in which the node has recorded the sequence number;
Transmitting the first data collected by the node according to the transmission time point to the data collection center;
The data collection center receiving the first data from the node to a first reference time point and updating the data slot counter;
Determining whether the data collection center corresponds to a second reference time point of the first link counter; And
Transmitting the second data to the node when the first link counter corresponds to the second reference time point and updating the first link counter according to a result of the determining step
/ RTI > The method according to claim 1,
Resetting the data slot counter if the first link counter does not correspond to the second reference time point according to a result of the determining step; And
Repeating the step of updating the data slot counter until the first link counter corresponds to the second reference time
Lt; / RTI > Transmitting a reference clock to a node by a data acquisition center;
Resetting a time slot counter and a timing clock transmitted from the data acquisition center;
The node monitoring a timing clock;
Resetting the time slot counter if the timing clock corresponds to a rising time, and collecting first data by the node;
The node updating the timeslot counter;
Determining whether the time slot counter to be updated corresponds to a first link time point at which the first data is transmitted from the node to the data collection center using an internal timer and an internal timer; Transmitting the first data to the data collection center, and updating the time slot counter until the corresponding time slot counter does not correspond to the second link time And a transmission time point of the transmission time point; And
Transmitting a control signal from the data collection center to the node according to the transmission time point
/ RTI > The method of claim 3,
If the timing clock does not correspond to the rising time, monitoring the timing clock again until the timing clock corresponds to the rising time
Lt; / RTI >
A method of operating a data collection center for communicating with a node,
Initializing the system and generating a clock;
Resetting the clock counter and the first link counter;
Transmitting a reference clock to the node;
Updating a first link counter and a clock counter;
Resetting a data slot counter;
Receiving first data from a node searching for a transmission time point of first data based on the clock using a memory in which a sequence number is recorded and an internal timer from a first reference time point to a first reference time point;
Updating the data slot counter; And
Determining whether a first reference time point of the first link counter corresponds to a second reference time point
Lt; / RTI >
And if so, transmitting the second data to the node, updating the first link counter,
And resetting the data slot counter when the data slot counter does not correspond to the data slot counter and sequentially repeating the step of receiving the first data.

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