KR20130012720A - Apparatus and method for providing dgps information using terrestrial dmb, apparatus for receiving the dgps information - Google Patents

Abstract

PURPOSE: A DGPS information providing system, a method and a DGPS information reception system using terrestrial broadcasting channel DMB is provided to more rapidly offer DGPS information. CONSTITUTION: A DGPS base station(410) transmits DGPS information to a DGPS distributor(420) through NTRIP(Networked Transport of RTCM Via Internet Protocol) over the internet. The DGPS distributor converts received DGPS information to RTCM format and distributes to an FIDC(Fast Information Data Channel)-DGPS transmission system(432), a TPEG(Transport Protocol Expert Group)-DGPS transmission system(434) and a TDC(Transparent Data Channel)-DGPS transmission system(436). The FIDC transmission system, the TPEG-DGPS transmission system and the TDC-DGPS transmission system transmit DGPS information to a ReMUX(450) after converting to FIDC format, TPEG format and TDC format. The ReMUX multiplexes transmitted DGPS information and transmits through a transmission antenna(460). [Reference numerals] (410) DGPS base station; (420) DGPS distributor; (432) FIDC-DGPS transmission system; (434) TPEG-DGPS transmission system(for TDC); (436) TDC-DGPS transmission system(without TPEG); (440) DMB multiplexer

Description

APPARATUS AND METHOD FOR PROVIDING DGPS INFORMATION USING TERRESTRIAL DMB, APPARATUS FOR RECEIVING THE DGPS INFORMATION}

Embodiments of the present invention relate to an apparatus and method for providing DGPS information using terrestrial DMB that provides DGPS (Differential Global Positioning System) information using terrestrial digital multimedia broadcasting (DMB).

Currently, global positioning system (GPS) using satellite is being utilized in various fields due to the development of satellite communication technology. Generally, GPS information transmitted from a satellite to a GPS receiver on the ground has a certain error due to various causes. If two receivers are located at a distance from each other, the two receivers have a similar error. Differential Global Positioning System (DGPS) information is used to obtain more precise data by offsetting the common errors of these two receivers.

1 is a schematic diagram illustrating a general DGPS system. Referring to the drawings, the GPS information transmitted from the plurality of GPS satellites 101 to 104 is received by the plurality of GPS antennas 111 to 112 installed on the ground and transmitted to the DGPS reference station 120. The DGPS reference station 120 generates DGPS information based on the GPS information received by the GPS antennas 111 to 112 and then uses the Beacon transmitting antenna 130 to provide the DGPS information. Transmit to receivers 141 to 143. The DGPS information receivers 141 to 143 correct the GPS information received from the plurality of GPS satellites 101 to 104 using the DGPS information received through the Beacon transmitting antenna 130 to provide more accurate location information to the user. to provide. Such DGPS information is currently provided to users through AM broadcasting (medium frequency broadcasting).

On the other hand, Korean Patent Laid-Open Publication No. 10-2000-0046616 "High precision position correction information transmission method and transmission system using the FM broadcast system, the receiver" describes a technique for correcting the position by encoding the DGPS information in a format suitable for FM broadcast.

However, the DGPS information provided through the AM broadcasting or the FM broadcasting has a disadvantage that the information transmission speed is very slow, and since the length of the receiving antenna is relatively long due to the characteristics of AM broadcasting and FM broadcasting, It is difficult to mount it on a navigation device, the price of such a device is high and the field of use thereof is very limited. Also, since the DGPS information is transmitted based on a single reference station, there is a problem that the accuracy of the location information decreases as the base line distance increases.

Accordingly, there is a demand for a method capable of providing accurate DGPS information more quickly and providing DGPS information to various devices.

By providing DGPS information through the terrestrial DMB, a DGPS information providing apparatus and method capable of providing DGPS information faster and more accurate GPS information are provided.

Provided is a DGPS information providing apparatus and method for providing DGPS information to more various devices by providing DGPS information using terrestrial DMB.

A device that provides DGPS (Differential Global Positioning System) information includes at least one of a terrestrial digital multimedia broadcasting (DMB) through at least one of a transparent data channel (TDC), a multimedia object transfer (MOT) channel, and a fast information channel. Information can be sent.

According to one side, the DGPS information may be converted into a Radio Technical Commission for Maritime services (RTCM) 2.3 format and transmitted.

According to another aspect, the DGPS information includes a data head consisting of a message type of 6 bits, a modified Z-count of 13 bits, and a frame length of 5 bits, and may include a plurality of 40-bit data codes.

According to another aspect, the DGPS information may be converted into a fast information data channel (FIDC) method, a transport protocol expert group (TPEG) method, and a transparent data channel (TDC) method, and then multiplexed and transmitted.

The apparatus for receiving Differential Global Positioning System (DGPS) information includes at least one of a terrestrial digital multimedia broadcasting (TDC), multimedia object transfer (MOT) channel, and fast information channel (MOT) of a terrestrial digital multimedia broadcasting (DMB) from a DGPS base station. It may include a DMB signal receiving unit for receiving a DMB signal including the DGPS information transmitted through the DGPS information extraction unit for extracting the DGPS information from the DMB signal received by the DMB signal receiving unit.

The method for providing differential global positioning system (DGPS) information includes converting the DGPS information into a Radio Technical Commission for Maritime services (RTCM) 2.3 format and converting the converted DGPS information into a terrestrial digital multimedia broadcasting (TDC) transparent. The method may include transmitting through at least one of a data channel, a multimedia object transfer (MOT) channel, and a fast information channel.

By changing the DGPS information to RTCM 2.3 format and providing it through TDC, MOT channel, FIC, etc. of terrestrial DMB, DGPS information can be provided more quickly and more accurate GPS information can be provided.

By providing DGPS information using the terrestrial DMB, DGPS information can be provided to various devices capable of receiving terrestrial DMB signals.

1 is a conceptual diagram illustrating a general DGPS system.
2 is a diagram illustrating a hierarchical structure of terrestrial DMB according to an embodiment of the present invention.
3 is a diagram illustrating a configuration of a KDGPS_DMB data packet according to an embodiment of the present invention.
4 is a diagram illustrating an apparatus for providing DGPS information when providing DGPS information through an FIC and a TDC according to an embodiment of the present invention.
5 is a diagram illustrating a configuration of a MOT carousel according to one embodiment of the present invention.
6 is a diagram illustrating an apparatus for providing DGPS information when transmitting DGPS information through a MOT channel according to an embodiment of the present invention.
7 is a flowchart illustrating a method of providing DGPS information according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present invention, in order to transmit DGPS information more quickly and provide more accurate GPS information, DGPS information is provided through terrestrial DMB.

2 is a diagram illustrating a hierarchical structure of terrestrial DMB according to an embodiment of the present invention. Referring to the figure, the terrestrial DMB is divided into a fast information channel (FIC) and a main service channel (MSC). The FIC is a channel used when data is small and needs to be transmitted at a very fast period. The MSC is a channel used when transmitting general audio / video data.

In the FIC, Fast Information Data Channel (FIDC) is a channel for transmitting data at high speed, and MCI / SI (Multiplex Configuration Information / Service Information) is used in transmitting information related to multiplexing configuration information and services of the MSC. EWS (Emergency Warning System) is used when transmitting an emergency alert signal, TMC (Traffic Message Channel) is used when sending traffic conditions or emergency news in real time.

The MSC is further classified into an audio / video (A / V) service and a data service, and the data service may be classified into a multimedia object transfer (MOT), a transparent data channel (TDC), and an IP tunneling. The MOT is a protocol for downloading a file to a receiver. The MOT may be used as a data carousel for periodically downloading data. The TDC is a protocol that provides a function for transmitting data without limitation in format. The IP tunneling provides a path for the IP packet. Meanwhile, BWS (Broadcast Website Service) is used for providing web service and TPEG (Transport Protocol Expert Group) is used for providing real time traffic information and additional information service. Therefore, as shown in the present invention, the DGPS information can be provided through the FIC, the MOT channel, and the TDC that can transmit data using the DMB.

3 is a diagram illustrating a configuration of a KDGPS_DMB data packet according to an embodiment of the present invention. Hereinafter, the configuration of the KDGPS (Korean DGPS) data packet will be described with reference to FIG.

In DMB, user application information can be defined to support various application services. In this case, FIG. 13 (FIG 0/13) of FIG. The packet configuration of the user application data may be composed of 11-bit user application type definition (b15-b5), 5-bit user application data length (b4-b0) have.

That is, b15-b5 can directly apply the code (00000000101) allocated for the DGPS information of the ETSI 300 401, and b4-b0 can display the length of the DGPS_DMB data field in units of bytes. In addition, the data field of DGPS_DMB may be configured as shown in FIG. 3, and may be composed of a data head occupying 24 bits and a 40-bit data code.

The data head may be configured as shown in Table 1 as an example.

RTCM SC-104 DARC / DGPS Preamble 8 X Message type 6 6 Station ID 10 X Modified Z-count 13 13 Sequence No. 3 X Length of frame 5 5 Station health 3 X Parity 12 X sum 60 24

The data head is located at the beginning of a data field of the DGPS_DMB format and is composed of two words (30 bits / word) appearing at the beginning of every message format defined by the Radio Technical Commission for Maritime Services Special Committee 104 (RTCM SC-104) A message type of 6 bits required for DGPS_DMB, a modified Z-count of 13 bits, and 24 bits of a length of frame of 5 bits.

That is, information required for transmitting DGPS_DMB information includes six items of scale factor, UDRE, Satellite ID, PRC, RRC, and IOD, and data bits required for each of them are shown in Table 2 below.

division RTCM SC-104 Precision Remarks Scale factor One UDRE 2 Satellite ID 5 PRC 16 0.02 m RRC 8 0.002 m / s IOD 8 sum 40

Therefore, the DGPS information providing apparatus according to the present invention can transmit DGPS information through at least one of the TDC, the MOT channel and the FIC of the terrestrial DMB by converting the DGPS information into the packet configuration as described above. In this case, the DGPS information is converted into the RTCM SC-104 format, for example. However, in another embodiment, the DGPS information may be converted into the RTCM 2.3 format and transmitted.

4 is a diagram illustrating an apparatus for providing DGPS information when providing DGPS information through an FIC and a TDC according to an embodiment of the present invention. Referring to the drawings, the DGPS information may be transmitted from the DGPS base station 410 to the DGPS distributor 420 in the Networked Transport of RTCM Via Internet Protocol (NTRIP) via the Internet. The DGPS distributor 420 converts the DGPS information received from the DGPS base station 410 into an RTCM format (for example, RTCM SC-104 or RTCM 2.3) to convert the FIDC-DGPS transmission system 432 and TPEG-DGPS. The distribution system 434 and the TDC-DGPS transmission system 436 can be distributed.

The DGPS information distributed to the FIDC-DGPS transmission system 432, the TPEG-DGPS transmission system 434, and the TDC-DGPS transmission system 436 is respectively a fast information data channel (FIDC) method and a transport protocol expert group (TPEG) method. And after the conversion to the TDC (Transparent Data Channel) scheme can be multiplexed in the ReMUX (450) and transmitted through the transmit antenna (460).

Meanwhile, the DGPS information converted by the TPEG (Transport Protocol Expert Group) and the TDC (Transparent Data Channel) methods in the TPEG-DGPS transmission system 434 and the TDC-DGPS transmission system 436 is DMB such as EMX100, DBS100, and EPC100. After the multiplexer 440 is multiplexed into an ETI signal, the multiplexer 440 may be multiplexed with the DGPS information converted into a fast information data channel (FIDC) scheme through the REMUX 450 and transmitted to the ETI-NA standard.

FIG. 5 is a diagram illustrating a configuration of a MOT carousel according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating a DGPS information providing apparatus when transmitting DGPS information through a MOT channel.

As shown in FIG. 5, the MOT carousel may be configured by selecting a reference point position of the DGPS information in consideration of an adjacent area according to a transmission site. Therefore, when only the file required when DGPS information is provided is transmitted or an error occurs, the DGPS information can be accurately provided by using the MOT carousel.

Meanwhile, when transmitting the DGPS information through the MOT channel, as shown in FIG. 5, the DGPS information transmitted from the RAAS server 610 to the DGPS linkage server 620 is transmitted through a LAN to the plurality of DGPS encoders 631 to 632. Can be sent to. The DGPS information encoded in the DGPS encoders 631 to 632 is encoded into the DMB transmission format through the DMB data encoders 641 to 642, respectively. The DGPS information encoded in the DMB transmission format may be duplicated through the ETI / STI switch 650, and then encoded and provided through the DMB ensemble encoders 661 to 662.

When the DGPS information receiving apparatus including the DMB receiving function receives the DMB signal including the provided DGPS information transmitted through the TDC, the MOT channel, the FIC, and the like of the terrestrial DMB through the above method, the DGPS information receiving apparatus receives the By extracting the DGPS information from the DMB signal and correcting the GPS information received from the GPS satellites, accurate location information can be provided to the user.

7 is a flowchart illustrating a method of providing DGPS information according to an embodiment of the present invention.

When the DGPS information is provided from the DGPS base station to the DGPS information providing apparatus, the DGPS information providing apparatus converts the DGPS information into the RTCM SC-104 or RTCM 2.3 format (S710). In this case, the DGPS information may be converted into a fast information data channel (FIDC) method, a transport protocol expert group (TPEG) method, and a transparent data channel (TDC) method, respectively. Thereafter, the DGPS information providing apparatus multiplexes the converted DGPS information and transmits it through at least one of a TDC, a MOT channel, and a fast information channel of a terrestrial DMB (S720).

When the DGPS information is transmitted through the terrestrial DMB (T-DMB) as described above, the DGPS information receiving apparatus extracts the DGPS information from the DMB signal and corrects the GPS information received from the GPS satellite using the extracted DGPS information ( S730).

At this time, the DGPS information includes a data head having a message type of 6 bits, a modified Z-count of 13 bits, and a frame length of 5 bits as described above, and may include a plurality of 40-bit data codes .

Therefore, the DGPS information providing apparatus and method and the DGPS information receiving apparatus using the terrestrial DMB according to the present invention change the DGPS information into the RTCM 2.3 format and provide the DGPS information through the TDC, MOT channel, and FIC of the terrestrial DMB, Provide more accurate GPS information, and can provide DGPS information to various devices capable of receiving terrestrial DMB signals.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the equivalents of the claims, as well as the claims.

410: DGPS base station
420: DGPS Splitter
432: FIDC-DGPS Transmission System
434: TPEG-DGPS Transmission System
436: TDC-DGPS Transmission System
440: DMB multiplexer
450: multiplexer
460: transmit antenna

Claims (11)

In the apparatus for providing DGPS (Differential Global Positioning System) information,
DGPS information providing apparatus for transmitting DGPS information through at least one of a transparent data channel (TDC) of a terrestrial digital multimedia broadcasting (DMB), a multimedia object transfer (MOT) channel, and a fast information channel. The method of claim 1,
The DGPS information,
DGPS information providing device that is converted to the Radio Technical Commission for Maritime services (RTCM) 2.3 format and transmitted. The method of claim 2,
The DGPS information,
A data head comprising a message type of 6 bits, a modified Z-count of 13 bits, and a frame length of 5 bits, and comprising a plurality of 40-bit data codes. The method of claim 1,
The DGPS information,
An apparatus for providing DGPS information, which is converted into a fast information data channel (FIDC) method, a transport protocol expert group (TPEG) method, and a transparent data channel (TDC) method, and then multiplexed and transmitted. In the device for receiving DGPS (Differential Global Positioning System) information,
A DMB signal including the DGPS information transmitted from a DGPS base station through at least one of a terrestrial digital multimedia broadcasting (DMB), a transparent data channel (TDC), a multimedia object transfer (MOT) channel, and a fast information channel. Receiving DMB signal receiving unit; And
DGPS information extraction unit for extracting the DGPS information from the DMB signal received by the DMB signal receiving unit
The DGPS information receiving apparatus comprising a. The method of claim 5,
The DGPS information,
A device for receiving DGPS information, which is converted to RTCM (Radio Technical Commission for Maritime services) 2.3 format and transmitted. The method according to claim 6,
The DGPS information,
A data head comprising a message type of 6 bits, a modified Z-count of 13 bits, and a frame length of 5 bits, and comprising a plurality of 40-bit data codes. The method of claim 5,
The DGPS information,
The apparatus for receiving DGPS information, which is converted into a fast information data channel (FIDC) method, a transport protocol expert group (TPEG) method, and a transparent data channel (TDC) method, and then multiplexed and transmitted. In the method for providing DGPS (Differential Global Positioning System) information,
Converting the DGPS information into a Radio Technical Commission for Maritime services (RTCM) 2.3 format; And
Transmitting the converted DGPS information through at least one of a terrestrial digital multimedia broadcasting (DMB) through a transparent data channel (TDC), a multimedia object transfer (MOT) channel, and a fast information channel.
Including, DGPS information providing method. 10. The method of claim 9,
The DGPS information,
A data head comprising a message type of 6 bits, a modified Z-count of 13 bits, and a frame length of 5 bits, and comprising a plurality of 40 bits of data code. 10. The method of claim 9,
Wherein the converting comprises:
Converting the DGPS information into a fast information data channel (FIDC) method, a transport protocol expert group (TPEG) method, and a transparent data channel (TDC) method according to an RTCM 2.3 format; And
Multiplexing the converted DGPS information
Including, DGPS information providing method.

Images