KR20180116012A - Device for transmitting position data packet and the method thereof - Google Patents

Abstract

The present invention relates to an apparatus and a method for transmitting a position data packet and, more specifically, to a device and a method for transmitting a position data packet, which are capable of compressing and transmitting GPS position data in low-speed communications. According to an embodiment of the present invention, the apparatus for transmitting a position data packet transmits, as the position data, a bit string including: date data composed of a hexa-code in one byte of each of year, month, and day data, time data composed of a hexa-code in one byte of each of hour, minute, second data, validity direction data of one byte representing, on a predetermined bit string, inclusion of data validity, object mobility, latitude direction, longitude direction, and second unit information, latitude data composed of hexa-code of four bytes, and longitude data composed of hexa-code of four bytes. When a data validity bit value in a validity direction data byte is 1, the latitude data and the longitude data are included and transmitted. When the data validity bit value is 0, the latitude data and the longitude data are not included.

Description

TECHNICAL FIELD [0001] The present invention relates to a position data packet transmission apparatus and a position data packet transmission apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and method for transmitting a position data packet, and more particularly, to a position data packet transmitting apparatus and method for compressing and transmitting GPS position data in low-speed communication.

Generally, GPS position data includes current time information, data validity information, latitude and longitude, longitude and direction, and date information, and is transmitted in the form of a string of 38 bytes. Conventionally, a method and system for transmitting GPS data in a mobile network (Korean Patent Laid-Open No. 2003-0075154) have been disclosed. However, the prior art has a problem in that it is not sufficient to compress and transmit important information of GPS effectively.

Therefore, there is a need for research on a position data transmission apparatus that effectively compresses and transmits GPS position data in low-speed communication or the like.

The present invention provides an apparatus and method for transmitting a position data packet capable of excluding unnecessary information in low-speed communication and transmitting only necessary information in a small-sized data packet by constructing only the main data information of the GPS position data by converting into hexa code.

The present invention provides an apparatus and method for transmitting a position data packet capable of effectively compressing and transmitting key information by assigning data validity, latitude direction, and longitudinal direction information to one bit, respectively.

The present invention provides an apparatus and method for transmitting a position data packet capable of enhancing data security by encrypting and transmitting compressed data.

The position data packet transmission apparatus according to an embodiment of the present invention is configured to transmit date data composed of one byte of hexadecimal data and date, hour, minute and second data of 1 byte each in hexadecimal One byte of validity direction data indicating whether data validity, object mobility, latitude direction, longitude direction, and second unit information is included in a predetermined bit string, latitude data composed of a 4-byte hex code, The latitude data and the latitude data are transmitted including the data validity bit value of the validity direction data byte being 1, , And when it is 0, it is not included.

According to one aspect of the present invention, the validity direction data includes at least one of a first bit of the 8-bit bit string, a direction of the longitude, a second bit of the latitude, a third bit of movement, The fifth bit may indicate whether or not to include the second unit information, and the 8-bit bit string may be converted into a 1-byte hex code.

According to an aspect of the present invention, the latitude data may be composed of 4 bytes of hexadecimal data in which 1 byte is expressed in degrees, 1 byte in units of minutes, and 2 bytes in units of seconds.

According to one aspect of the present invention, the hardness data may be composed of 4 bytes of hexadecimal data in which 1 byte is expressed in degrees, 1 byte in units of minutes, and 2 bytes in units of seconds.

According to an aspect of the present invention, a cipher and a code obtained by combining 8 bytes of message header, 32 bytes of message integrity code, and 1 byte of zero pad into the 15-byte position data can be generated and transmitted as transmission position data.

According to one embodiment of the present invention, only the main data information of the GPS position data is converted into the hexadecimal code so that unnecessary information can be excluded from the low-speed communication and only the necessary information can be transmitted as the small- And methods are provided.

According to an embodiment of the present invention, there is provided an apparatus and method for transmitting a position data packet capable of effectively compressing and transmitting key information by assigning data validity, latitude direction, and longitudinal direction information to one bit, respectively.

According to an embodiment of the present invention, there is provided an apparatus and method for transmitting a position data packet capable of enhancing data security by encrypting and transmitting compressed data.

1 is a diagram illustrating location data transmitted by a position data packet transmission apparatus according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating position data transmitted by a position data packet transmission apparatus when data is invalid (when GPS is not measured) according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a bit stream structure of validity direction data according to an embodiment of the present invention.
4 is a diagram illustrating a process of generating transmission position data by encrypting position data 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. However, the present invention is not limited to or limited by the embodiments. Like reference symbols in the drawings denote like elements.

When the position data is to be transmitted in long-distance low-speed communication, the position data may be compressed and then transmitted in an encrypted form. The conventional position data has a problem that the data length is too long and a lot of unnecessary data is added . This has been a problem in that long-term low-speed communication (speeds of several tens of kilobits per second (bps) or less) occupies the channel for a long time and greatly reduces the packet transmission rate per hour.

The conventional GPS data format may be configured as "$ GPRMC, 134807.000, A, 3732.6627, N, 12701.3549, E, 1.58, 329.68, 160808 ,, A * 63 & N is the latitude direction, "12701.3549" is the longitude coordinate, and "E" is the latitude and longitude coordinates, respectively. Is the information indicating the longitude direction, and "080816 " is the date 8 and August 2016 respectively.

Therefore, in this case, when all information is to be transmitted, the total data length sum is 10 + 1 + 9 + 1 + 10 + 1 + 6 = 38 bytes (the position data is processed in the form of a string) A packet of 46 bytes is formed, and when it is encrypted, a packet of 88 bytes is created.

However, considering that it is difficult for individual nodes to communicate more than once per second in low-speed communication, the time unit of less than seconds is meaningless. In other words, if the number of subscribers of the location service increases, the location data may not be able to be transmitted quickly (there is a case where it is difficult to transmit once a second). Therefore, it is necessary to send time data, do.

1 is a diagram illustrating location data transmitted by a position data packet transmission apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the position data packet transmission apparatus can transmit position data 100 composed of 15 bytes, and the position data 100 includes a 1-byte hexadecimal code for year, month, The date data 110 and the hour data 120 constituted by 1 byte of hexadecimal data and the data validity, the object mobility, the latitude direction, the longitudinal direction, Byte validity direction data 130 to be displayed according to a set bit string, latitude data 140 composed of a 4-byte hexadecimal code, and hardness data 140 composed of a 4-byte hexadecimal code .

That is, in the present invention, the date data represented by 080816 (6 bytes) can be represented by 3 bytes of hexadecimal code (0x08, 0x08, 0x10) Time data can be displayed as 3 byte hexadecimal codes (0x0D, 0x30, 0x07) by changing the notation.

Also, the latitude data conventionally expressed as 3732.6627 (9 bytes) may be represented in the present invention to be represented by 4 bytes of hexadecimal code (0x25, 0x20, 0x42, 0x1B), and conventionally, 12701.3549 The represented hardness data can be represented by a 4-byte hexadecimal code (0x7F, 0x01, 0x23, 0x31).

Here, when data is not valid, such as when GPS is not measured, it is meaningless to transmit latitude data and longitude data, so that the location data 100 may be composed of 7 bytes. The 7-byte configuration when data is invalid is described in detail below with reference to FIG.

FIG. 2 is a diagram illustrating position data transmitted by a position data packet transmission apparatus when data is invalid (when GPS is not measured) according to an embodiment of the present invention.

2, if the data is invalid, 7 bytes of position data 200 including 3 bytes of date data 110, 3 bytes of time data 120, and 1 byte of validity direction data 130, Can be transmitted.

On the other hand, the validity direction data 130 included in both cases where data is valid and data is invalid is configured to be one byte in size, and data validity, object mobility, latitude direction, longitude direction, Can be displayed in a predetermined bit string.

A specific embodiment of the validity direction data 130 is described in more detail below with reference to FIG.

FIG. 3 is a diagram illustrating a bit stream structure of validity direction data according to an embodiment of the present invention.

3, the validity direction data 130 may be composed of 8 bits, where the first bit is the direction of the longitude, the second bit is the direction of the latitude, the third bit is the movement, the fourth bit is the validity, The fifth bit may indicate whether or not to include the second unit information.

That is, when the longitudinal direction is East in the first bit, it is represented as 0, and when the longitudinal direction is West, it can be represented as 1. In the second bit, when the latitude direction is North, it is represented as 0, 1 " in the case of " South ".

In the case of the third bit, when the object transmitting the position data is moving, 0 can be displayed when the object is not moved. In the case of the fourth bit, 1 is displayed when the data is valid, 0 " can be displayed.

That is, according to an embodiment of the present invention, it is possible to transmit the mobility data together even if there is no validity of the location data, so that it is possible to know whether the object is moving or staying. Therefore, .

At this time, whether or not the object is moved can be detected by using the motion detection sensor, and it is possible to convey whether the object is moving or staying even if the GPS is not detected.

Meanwhile, an example of the information transmitted through the validity direction data 130 of FIG. 3 is as follows.

(1) When the object stays without moving (when the speed change is less than a certain level)

If the data is valid and latitude is north latitude longitude: 00001000 = 0x08

If the data is valid and latitude is longitude in the south latitude: 00001010 = 0x0A

If the data is not valid and the latitude is north longitude is longitude: 00000000 = 0x00

(2) When the object is moving (when the speed change is more than a certain level)

If the data is valid and latitude is north latitude longitude: 00001100 = 0x0C

If the data is valid and latitude is longitude in the south latitude: 00001110 = 0x0E

If the data is not valid and latitude is longitude north latitude: 00000100 = 0x04

On the other hand, in the case where it is not necessary to transmit the second unit information when transmitting the time data 120 (for example, in the case of a system in which data is transmitted in units of minutes instead of seconds) due to a large number of subscribers, In this case, the fifth bit of the validity direction data 130 may be transmitted as 1 or 0 depending on whether or not the information includes the second unit information.

Therefore, according to the embodiment of the present invention, information can be changed according to the current subscriber or system state, so that optimal data transmission according to the current situation can be achieved.

On the other hand, if the hex code shown in FIG. 1 is interpreted as described above, the data will be valid on August 8, 2018, at 13:48:07. The data will be valid, Quot; or " staying in one place ".

4 is a diagram illustrating a process of generating transmission position data by encrypting position data according to an embodiment of the present invention.

Referring to FIG. 4, the 15-byte position data is combined with the 32-byte message key generated by the 16-byte encryption key, and the zero pad for matching the data standard is 1 byte (standard customized bit for AES 128 data encryption) And then combined with 8 bytes of node message header, it can be encrypted with 56 bytes of node message packet.

When the size of the packet is calculated according to the various situations described above, it is possible to transmit (in case of not private information) 1) data of 23 bytes including a header when transmitting data in a normal form, 2) The header can be transmitted in 17 bytes including the header, and 3) in the case of the system transmitting the position in units of minutes, the header can be transmitted in 22 bytes including the header.

If encryption is required, the final encrypted data is 56 bytes. At this time, when the secure node message packet is encrypted, the size of zero pad 16 becomes 1 byte. If the data is not valid, the size of the position data is 7 bytes and the size of the zero pad 16 is 9 bytes. When the position is transmitted in minutes, the size of the position data is 14 bytes and the size of zero pad 16 The size can be composed of 2 bytes.

Also, the location data transfer method according to an embodiment of the present invention may be recorded in a computer-readable medium including program instructions for performing various computer-implemented operations. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The media may be program instructions that are specially designed and constructed for the present invention 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.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be construed as limiting the scope of the invention as defined by the appended claims. Various modifications and variations are possible in light of the above teachings. Accordingly, it is to be understood that one embodiment of the present invention should be understood only by the appended claims, and all equivalent or equivalent variations thereof are included in the scope of the present invention.

Claims (6)

A position data packet transmission apparatus comprising:
The date data composed of the 1-byte hexadecimal data of the year, month, and day data,
Hour, minute, and second data are respectively composed of 1-byte hexadecimal data,
One byte of validity direction data indicating whether data validity, object mobility, latitude direction, longitude direction, and second unit information is included in a predetermined bit string,
Latitude data composed of a 4-byte hex code,
A bit string including the hardness data composed of 4 bytes of hex code is transmitted as the position data,
Wherein the latitude data and the latitude data are transmitted when the data validity bit value in the validity direction data byte is 1 and are not included when the data validity bit value is 0. [ The method according to claim 1,
The validity direction data includes:
The first bit of the 8-bit bit string indicates the direction of the longitude, the second bit indicates the direction of the latitude, the third bit indicates whether movement is performed, the fourth bit indicates validity, and the fifth bit indicates whether or not the information includes seconds unit Wherein the 8-bit bit string is converted into a 1-byte hex code. The method according to claim 1,
Wherein the latitude data comprises:
And a hexadecimal 4-byte unit expressed by 1 byte in units of degrees, 1 byte in units of minutes, and 2 bytes in units of seconds. The method according to claim 1,
The hardness data includes:
And a hexadecimal 4-byte unit expressed by 1 byte in units of degrees, 1 byte in units of minutes, and 2 bytes in units of seconds. The method according to claim 1,
And generates and transmits, as transmission position data, a code and a code obtained by combining 8 bytes of the message header, 32 bytes of the message integrity code and 1 byte of the zero pad in the above 15 bytes of position data. In a location data transmission method,
The date data composed of the 1-byte hexadecimal data of the year, month, and day data,
Hour, minute, and second data are respectively composed of 1-byte hexadecimal data,
One byte of validity direction data indicating whether data validity, object mobility, latitude direction, longitude direction, and second unit information is included in a predetermined bit string,
Latitude data composed of a 4-byte hex code,
A bit string including the hardness data composed of 4 bytes of hex code is transmitted as the position data,
Wherein the latitude data and the latitude data are transmitted when the data validity bit value in the validity direction data byte is 1, and when the data validity bit value is 0, the latency data and the latitude data are not included.

Images