CN104954098A - CORS (continuously operating reference system) data coding and transmitting method applicable to long-distance communication - Google Patents
CORS (continuously operating reference system) data coding and transmitting method applicable to long-distance communication Download PDFInfo
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- CN104954098A CN104954098A CN201510279951.1A CN201510279951A CN104954098A CN 104954098 A CN104954098 A CN 104954098A CN 201510279951 A CN201510279951 A CN 201510279951A CN 104954098 A CN104954098 A CN 104954098A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0041—Arrangements at the transmitter end
- H04L1/0042—Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape
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- Computer Networks & Wireless Communication (AREA)
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- Detection And Prevention Of Errors In Transmission (AREA)
Abstract
The invention discloses a CORS (continuously operating reference system) data coding and transmitting method applicable to long-distance communication. The CORS data coding and transmitting method includes steps of receiving data by the aid of Beidou receivers on Beidou CORS vehicles and transmitting the data to CORS service systems; grouping differential data information in the CORS data; respectively coding two groups of information in an anti-interference manner; transmitting the coded data to high-power ultra-short wave radio sets via ultra-short wave interfaces by the aid of industrial control computers; transmitting the data to long-distance receiving-side radio sets by the aid of the high-power ultra-short wave radio sets to completely transmit the data; transmitting the received data to the industrial control computers by the aid of the receiving-side radio sets and decoding the received data by the aid of the industrial control computers; transmitting the decoded CORS data to background servers to completely transmit the CORS data. The CORS data coding and transmitting method has the advantages that CORS differential data are extracted and coded by the aid of the Beidou CORS vehicles and the high-power ultra-short wave radio sets, so that the CORS data can be credibly transmitted over long distances, the bit error rate of CORS data long-distance communication can be reduced, the communication quality can be improved, and the CORS data coding and transmitting method is particularly applicable to conditions where communication facilities are destructed or communication signals are unavailable.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of CORS data encoding transmission method being suitable for long haul communication.
Background technology
Beidou satellite navigation system can provide high accuracy, highly reliable location, navigation and time service service, has navigation and the service characteristics combined that communicate.By the development of 19 years, this system is applied at numerous areas such as mapping, fishery, communications and transportation, telecommunications, water conservancy, forest fire protection, the mitigation disaster relief and national security, create significant economic benefit and social benefit, particularly in Wenchuan County in Sichuan, Yushu district, Qinghai earthquake relief work, play very important effect.
Under the generation of some disasters or case of emergency, when infrastructure and communications service are damaged, Big Dipper CORS car can play the advantage of its mobile site, utilizes the Wireless Telecom Equipment that it carries, and realizes the communicative between each CORS car point position and between CORS car point position and headquarter.But due to the restriction of mobile CORS car self-condition, realize and traditional 3G, the remote two-way trust data transmission that 4G communication mode is identical is impossible, due to the problem such as bust this, transmission error code that signal fadeout, Noise and Interference cause when inevitably there is long range propagation.Under normal conditions, CORS base station without the need to considering the data transmission problems that the error code that causes due to communication link or bust this cause because the communications facility of routine itself has certain error correction or retransmission mechanism.But under disaster or emergency environmental, the communication capacity limited based on mobile CORS and one-way transmission restriction, error of transmission, by having a strong impact on the performance of CORS hi-Fix service function, even causes service failure time serious.So just cannot play the maximum effect of Big Dipper CORS car.
In order to be destroyed at original communications facility or without in the environment of communication condition, the communication equipment long-range single utilizing mobile CORS car to carry to transmission time there is certain error condition under, realize the transmitting of CORS data as far as possible, and consider coverage and the economy that CORS car provides service, the present invention proposes the coding and transmission method being applicable to CORS Differential positioning data One-to-All Broadcast based on fault-tolerant encoding.
Summary of the invention
The technical problem to be solved in the present invention is the defect for not considering communications error code in existing CORS station technology, there is provided a kind of towards false channel one-way transmission, be applicable to coding and the transfer control method of the broadcast of long distance CORS Differential positioning service data, the method by CORS Differential positioning data are carried out resist miscode coding and control different types of data broadcast the cycle, utilize Big Dipper CORS car and high-power ultrashort wave radio set, , achieve the broadcast service on a large scale of the high-precision fixed bit data of CORS, the transmission error code caused of reduction long haul communication is on the impact of CORS service quality and effectively utilize communication bandwidth.
The technical solution adopted for the present invention to solve the technical problems is: a kind of CORS data encoding transmission method being suitable for long haul communication, comprises the following steps:
1) before broadcasting transmitting, the differential data of CORS service is divided into groups, is divided into height to broadcast frequency information group, comprise Big Dipper epoch, GPS epoch, GLN epoch and antenna condition information; And lowly broadcast frequency information group, comprise CORS reference station coordinates, CORS reference station aerial information and receiver descriptor;
2) respectively anti-interference coding is carried out to two groups of grouping informations;
4) the data ultrashort wave radio set after coding is broadcast with different frequencies of broadcasting;
5) ultrashort wave radio set sends the data to distance reception end radio station, completes the transmission of data;
6) data of reception are transferred to industrial computer and decode by receiving terminal radio station;
7) send to terminal positioning to resolve decoded CORS data, complete the transmission of CORS data.
By such scheme, described step 3) in, frequency information is broadcast to height and adopts highly redundant anti-interference coding mode to encode, adopt highly redundant anti-interference coding mode to encode to low frequency information of broadcasting.
By such scheme, described step 3) in, frequency information is broadcast to height and adopts FEC (3/4) coded system to encode, adopt FEC (7/8) coded system to encode to low frequency information of broadcasting.
The beneficial effect that the present invention produces is: this method is by using Big Dipper CORS car and high-power ultrashort wave radio set, undertaken extracting and encoding achieving the long distance credible delivery of CORS data by CORS differential data, improve the resist miscode ability of CORS data long distance communication, improve communication quality, be specially adapted to communications service destruction or the situation without communication signal.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the method flow diagram of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Figure 1, a kind of CORS data encoding transmission method being suitable for long haul communication, comprises the following steps:
1) Beidou receiver on Big Dipper CORS car receives data, and sends to CORS service system;
2) CORS service system is divided into groups to the differential data information in CORS data, comprise Big Dipper epoch, GPS epoch, GLN epoch and antenna condition information height broadcast frequency information, and comprise CORS reference station coordinates, CORS reference station aerial information and the low of receiver descriptor and broadcast frequency information;
In general, CORS system can according to GNSS mobile terminal service demand, when broadcasting the real time dynamic differential data of BDS or GPS worldwide navigation navigation system, multiple combination form can be adopted, carrying different navigation satellite observed quantity data with different message number.GNSS mobile terminal, when carrying out real time dynamic differential location, except the observed quantity of needs CORS reference station visible satellite, also needs CORS reference station coordinates and CORS reference station antenna two key messages.
Differential data is defined as follows shown in table:
| Type of message | Message id | Transmission frequency |
| Big Dipper epoch | ||
| GPS epoch | 1004 | 1 second |
| GLN epoch | 1012 | 1 second |
| Reference station coordinates information | 1006 | 15 seconds |
| Reference station aerial information | 1008 | 1 second |
| Receiver describes | 1033 | 15 seconds |
| Antenna condition information | 4079 | 1 second |
3) respectively anti-interference coding is carried out to two groups of information;
Broadcasting frequency information to height adopts highly redundant anti-interference coding mode to encode, and adopts highly redundant anti-interference coding mode to encode to low frequency information of broadcasting.
Application claims ensures the compatibility of differential data before broadcast and after receiving; But in long distance communication, there is various distortion and noise, make the problem that the data in transmitting procedure change, adopt channel coding method to carry out error correction very necessary, by the transmitting and receiving two ends at long distance communication, respectively as required different codings is carried out to different differential message.The present invention adopts FEC forward error correction coding technology, by adding data redundancy, resist miscode, improves the quality of data in long range propagation process.
4) data after coding are sent to high-power ultrashort wave radio set by ultrashort wave interface by CORS service system;
5) high-power ultrashort wave radio set transmitter sends the data to distance reception end radio station, completes the transmission of data;
6) data of reception are transferred to industrial computer and carry out fec decoder by receiving terminal radio station;
7) decoded CORS data are sent to background server, complete the transmission of CORS data.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improve and convert the protection range that all should belong to claims of the present invention.
Claims (3)
1. be suitable for a CORS data encoding transmission method for long haul communication, comprise the following steps:
1) Beidou receiver on Big Dipper CORS car receives data, and sends to CORS service system;
2) the differential data information in CORS data is divided into groups, comprise Big Dipper epoch, GPS epoch, GLN epoch and antenna condition information height broadcast frequency information, and comprise CORS reference station coordinates, CORS reference station aerial information and the low of receiver descriptor and broadcast frequency information;
3) respectively anti-interference coding is carried out to two groups of information;
4) data after coding are sent to high-power ultrashort wave radio set by ultrashort wave interface by CORS service system;
5) high-power ultrashort wave radio set sends the data to distance reception end radio station, completes the transmission of data;
6) data of reception are transferred to industrial computer and decode by receiving terminal radio station;
7) decoded CORS data are sent to background server, complete the transmission of CORS data.
2. transmission method according to claim 1, is characterized in that, in described step 3), broadcasts frequency information adopt highly redundant anti-interference coding mode to encode to height, adopts highly redundant anti-interference coding mode to encode to low frequency information of broadcasting.
3. transmission method according to claim 1, is characterized in that, in described step 3), broadcasts frequency information adopt FEC(3/4 to height) coded system encodes, and adopts FEC(7/8 to low frequency information of broadcasting) coded system encodes.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510279951.1A CN104954098B (en) | 2015-05-27 | 2015-05-27 | A kind of CORS data encoding transmission methods for being applicable long haul communication |
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| CN201510279951.1A CN104954098B (en) | 2015-05-27 | 2015-05-27 | A kind of CORS data encoding transmission methods for being applicable long haul communication |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018218494A1 (en) * | 2017-05-31 | 2018-12-06 | 深圳市大疆创新科技有限公司 | Control terminal and control method therefor, and movable platform and control method therefor |
| CN115037356A (en) * | 2022-06-08 | 2022-09-09 | 中山大学 | Data subpackaging method and system for Beidou third RDSS link |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675858A (en) * | 2013-12-30 | 2014-03-26 | 辽宁工程技术大学 | B1/L1 carrier phase frequency mixing difference method for Beidou system and GPS (Global Positioning System) |
| CN103778687A (en) * | 2014-01-08 | 2014-05-07 | 广西鑫朗通信技术有限公司 | High-efficiency transmission system for vehicle wireless video monitoring |
| CN103885069A (en) * | 2014-04-11 | 2014-06-25 | 广东省天然气管网有限公司 | Long-distance pipeline GPS control measurement method based on CORS |
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- 2015-05-27 CN CN201510279951.1A patent/CN104954098B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103675858A (en) * | 2013-12-30 | 2014-03-26 | 辽宁工程技术大学 | B1/L1 carrier phase frequency mixing difference method for Beidou system and GPS (Global Positioning System) |
| CN103778687A (en) * | 2014-01-08 | 2014-05-07 | 广西鑫朗通信技术有限公司 | High-efficiency transmission system for vehicle wireless video monitoring |
| CN103885069A (en) * | 2014-04-11 | 2014-06-25 | 广东省天然气管网有限公司 | Long-distance pipeline GPS control measurement method based on CORS |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018218494A1 (en) * | 2017-05-31 | 2018-12-06 | 深圳市大疆创新科技有限公司 | Control terminal and control method therefor, and movable platform and control method therefor |
| CN115037356A (en) * | 2022-06-08 | 2022-09-09 | 中山大学 | Data subpackaging method and system for Beidou third RDSS link |
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