CN112672294A - Inland ship intelligent terminal 4G and Beidou short message communication switching method and device - Google Patents
Inland ship intelligent terminal 4G and Beidou short message communication switching method and device Download PDFInfo
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Abstract
The invention discloses a method and a device for switching communication between an inland ship intelligent terminal 4G and a Beidou short message, wherein the method comprises the following steps: 1) acquiring 4G signals in a navigation area of a inland ship and converting the 4G signal strength into an RSRP value; 2) comparing the RSRP detected in the navigation area of the inland ship with a set RSRP threshold value, and displaying the numerical value of the RSRP on a display screen; 3) judging whether to switch the communication mode: if the detection value is larger than or equal to the set threshold value, switching of the communication mode is not carried out, and 4G communication is normally used for data transmission; and if the detection value is smaller than the set threshold value, switching the communication mode to Beidou short message communication. The device of the invention comprises: the mobile phone comprises a main control module, a 4G communication module, a Beidou short message module, a 4G signal detection module, a 4G antenna, a Beidou antenna and a display screen. The invention utilizes the 4G communication technology and the Beidou short message to realize uninterrupted communication in the navigation process of inland ships, guarantee navigation safety and timely rescue when the inland ships are in danger.
Description
Technical Field
The invention relates to the technical field of ship communication, in particular to a ship bank communication technology of a ship intelligent terminal, and more particularly indicates a method and a device for switching communication between a inland ship intelligent terminal 4G and Beidou short messages.
Background
With the continuous development of shipping career in China, the tonnage and the number of inland ships are gradually increased, the ships tend to be standardized and large-sized, the water area environment of inland waterway in China is complicated, the ship flow is dense, and the risk probability of inland ship accidents is also gradually improved. Therefore, the ship-shore communication technology is a mode capable of transmitting information between a ship and a shore base, and has important significance for maintaining normal communication of the ship and guaranteeing navigation safety of the ship.
At present, ship-shore data transmission methods mainly include a ship-borne Automatic Identification System (AIS), a single side band communication method (SSB), a VHF communication method and a satellite communication method. Inland ship-shore communication is mainly ship-borne Automatic Identification System (AIS) and VHF communication, belonging to near field communication. The inland river, ship and shore communication channel in China is single, and other special data communication channels except the AIS system are not available; the AIS system adopts a broadcasting mode to transmit data communication, cannot realize point-to-point mode communication aiming at a certain specific ship, has limited speed and capacity of information transmission, and cannot ensure real-time performance and reliability of the data communication.
Compared with the traditional communication technology, the 4G communication technology has the following advantages: the communication speed is higher, and each channel occupies a frequency spectrum of 100 MHz; the compatibility is better, and the compatibility of various data is improved; seamless connection can be realized, and the storage capacity is larger. However, since the 4G signal has a coverage blind area in a part of the flow field of the inland ship sailing, the information cannot be transmitted by using the 4G communication channel alone.
The Beidou satellite navigation system has a very wide application prospect, the Beidou short message communication function is used as a unique function of the Beidou satellite, important information is generated under the condition of no signal coverage area, the position and the navigation condition or the distress condition of inland ship in the navigation flow area can be reported in time, and the rescue search efficiency is effectively improved.
Disclosure of Invention
Aiming at inland river drainage basins which are not covered by 4G signals, information can be transmitted to and received from a shore base through Beidou short message communication, and corresponding measures can be taken quickly when the situation that ship navigation is influenced is met.
In order to achieve the purpose, the method for switching the communication between the inland ship intelligent terminal 4G and the Beidou short message is characterized by comprising the following steps of:
1) acquiring 4G signals in a navigation area of a inland ship and converting 4G signal strength values into corresponding reference signal received power values RSRP; the RSRP is obtained by processing and converting a 4G signal strength value through an RSRP measurement algorithm;
2) comparing the RSRP detected in the inland ship navigation area with a set RSRP threshold value, and displaying the RSRP value on a display screen;
3) judging whether to switch the communication mode: if the detection value is larger than or equal to the set threshold value, switching of the communication mode is not carried out, and 4G communication is normally used for data transmission; if the detection value is smaller than the set threshold value, the communication mode is switched to Beidou short message communication along with language reminding after manual confirmation.
Preferably, the RSRP measurement algorithm in step 1) is:
RSRP＝PT-PN
in the formula, PTIs the average power of signal and noise, PNFor noise power, a is the number of OFDM symbols in a time slot resource, and n is the serial number of the number of OFDM symbols in each frequency domain; k is the number of pilot frequency time-frequency resources on the frequency domain; k is an integer number y of 1 to Kn(k) To receive a signal; y is*(k) In the form of a conjugate of the received signal.
Preferably, the specific steps of step 2) are: the RSRP value detected in the inland ship navigation area is transmitted to a display screen to be displayed, and the comparison result of the detection value and the set threshold value RSRP which is-100 dBm is displayed on the display screen.
Preferably, the specific steps of step 3) are: if the RSRP > is-100 dBm, the communication modes are not switched, the controller keeps the connection between the serial port and the level conversion circuit, normal signal matching is maintained, and data receiving and transmission are carried out through the 4G communication module; if the detection value RSRP is less than-100 dBm, the controller disconnects the serial port and the level conversion circuit, so that information cannot be transmitted through the 4G communication module, voice reminding is carried out, and after manual confirmation, the communication mode is switched to Beidou short message communication.
Based on the method, the invention also provides a device for switching the communication between the inland ship intelligent terminal 4G and the Beidou short message, which is characterized by comprising a main control module, a 4G communication module, a Beidou short message module, a 4G signal detection module, a voice module, a display screen, a power supply module, a 4G antenna and a Beidou antenna;
the main control module is used for controlling the working operation of the whole system and comprises RSRP algorithm processing in the 4G signal detection module and connection control between a serial port between the main control module and the 4G communication module and a level conversion circuit;
the 4G communication module is used for transmitting ship navigation data collected by the inland ship intelligent terminal and information obtained in a manual input mode to the shore-based management platform when the 4G signal detection module detects that RSRP is-100 dBm, and automatically capturing public information in the shore-based management platform;
the 4G signal detection module is used for receiving and detecting the 4G signal intensity in the navigation flowing field of the inland ship;
the Beidou short message module is used for transmitting information to the shore base and receiving the information from the shore base when the 4G signal detection module detects that RSRP is less than-100 dBm;
the power supply module is used for providing respective electric energy in the main control module, the 4G communication module, the Beidou short message module, the 4G signal detection module, the voice module and the display screen.
The invention has the advantages that:
(1) in the invention, the Beidou short message function of the Beidou satellite system has important information under the condition of no signal coverage area, and the navigation running state of inland river ships including longitude and latitude position information, navigation speed, course and the like which can be continuously reported to the shore-based Beidou satellite system terminal in real time can be realized, so that the inland river ships can be conveniently found, guided and rescued under the condition of influencing the navigation of the ships.
(2) In the invention, 4G communication transmission is taken as a main part, and Beidou short message communication transmission is taken as an auxiliary part, so that the defect of single communication channel of inland rivers and ships in China is overcome, and the ship-shore communication technology is diversified.
(3) Compared with the traditional AIS system communication, the 4G communication technology has the advantages of higher transmission speed, better compatibility, seamless connection realization, larger storage capacity and guarantee of real-time performance and reliability of data communication.
(4) In the invention, the 4G signal detection module detects the 4G signal intensity in the flow field in the navigation process of the inland ship in real time, so that the real-time performance and the accuracy of 4G signal detection are ensured, once the 4G signal intensity is lower than a threshold value, voice reminding is triggered immediately, and the Beidou short message module is switched after confirmation, so that the uninterrupted information in the navigation process of the inland ship is ensured.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the device for switching communication between the inland ship intelligent terminal 4G and the beidou short message.
FIG. 2 is a schematic view of the working process of the apparatus of the present invention.
In the figure: the intelligent Beidou navigation system comprises a main control module 1, a 4G communication module 2, a Beidou short message module 3, a 4G signal detection module 4, a voice module 5, a display screen 6, a power supply module 7, a 4G antenna 8 and a Beidou antenna 9.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
The invention provides a method for switching communication between an inland ship intelligent terminal 4G and a Beidou short message, which comprises the following steps:
1) the 4G signal detection module 4 receives the 4G signal through the 4G antenna 8, and the acquired 4G signal is processed and converted into an RSRP value through an RSRP measurement algorithm by a DSP chip in the 4G signal detection module 4. In a time-frequency resource diagram of a downlink transmission mode, the abscissa is a time domain, and each small grid represents the length of an Orthogonal Frequency Division Multiplexing (OFDM) symbol; the ordinate is the frequency domain, each small grid represents the width of a subcarrier, and each small grid represents the time-frequency resource of the smallest element RE of a radio resource. There is one slot resource per 12 subcarriers, and one slot corresponds to 7 OFDM symbols. According to the LTE mobile communication, the corresponding relationship between the resource elements at the transmitting end and the receiving end is Y ═ HX + N, which can be listed,
Yn(k)＝Hn(k)×Xn(k)+Nn(k)
wherein n is the serial number of OFDM symbols in each frequency domain; k is an integer number from 1 to K; k is the number of pilot frequency time-frequency resources on the frequency domain; y isn(k) To receive a signal; hn(k) Is the channel response coefficient at the time-frequency resource position; xn(k) To transmit information; n is a radical ofn(k) Noise and interference received by the receiving end.
For Yn(k) Multiply-transmit information conjugation
So as to obtain the compound with the characteristics of,
the average power of the signal and the noise is calculated,
wherein, a is the number of OFDM symbols in one time slot resource.
The power of the noise is calculated,
a corresponding RSRP value is calculated and,
RSRP＝PT-PN
2) the RSRP value detected in the inland ship navigation area is transmitted to the display screen 6 to be displayed, and the comparison condition between the RSRP value and the set threshold value RSRP which is-100 dBm can be visually seen on the display screen 6. Within the coverage range of the 4G signal, the RSRP value detected has fluctuation, but is still larger than the set threshold, because the 4G signal is continuously received and detected, the converted RSRP value has certain fluctuation along with the change of time and space, and the real-time performance and the accuracy of the 4G signal detection are ensured.
3) If the detected RSRP > is-100 dBm, the communication modes are not switched, the main control module 1 keeps the connection between the serial port and the level conversion circuit, maintains normal signal matching, and receives and transmits data through the 4G communication module 2; if the detection value RSRP is less than-100 dBm, the main control module 1 disconnects the serial port and the level conversion circuit, so that information cannot be transmitted through the 4G communication module 2, data is temporarily stored in the SD card along with voice reminding, after manual confirmation, the communication mode is switched to Beidou short message communication, and important information is screened out and transmitted.
Based on the method, the invention also provides a device for switching the communication between the inland ship intelligent terminal 4G and the Beidou short message, and as shown in the figure 1, the device comprises a main control module 1, a 4G communication module 2, a Beidou short message module 3, a 4G signal detection module 4, a voice module 5, a display screen 6, a power supply module 7, a 4G antenna 8 and a Beidou antenna 9.
The main control module 1 is used for controlling the work operation of the whole system and mainly comprises RSRP algorithm processing in the 4G signal detection module 4 and connection control between a serial port between the main control module 1 and the 4G communication module 2 and a level conversion circuit;
the 4G communication module 2 is configured to transmit ship navigation data such as speed, heading, and positioning information collected by the inland ship intelligent terminal and information such as passenger information and emergency call information acquired in a manual input manner to the shore-based management platform when the 4G signal detection module 4 detects that RSRP > is-100 dBm, and automatically capture announcement information, safety warning, navigation announcement, navigation information, water level information, weather information, and the like in the shore-based management platform.
The 4G signal detection module 4 is used for receiving and detecting the 4G signal strength in the navigation current domain of the inland ship.
The Beidou short message module 3 is used for transmitting important information and emergency information to the shore base and receiving key information from the shore base when the 4G signal detection module 4 detects that RSRP is < -100 dBm.
The power supply module 7 is used for providing respective electric energy in the main control module 1, the 4G communication module 2, the Beidou short message module 3, the 4G signal detection module (4), the voice module (5) and the display screen (6).
As shown in fig. 2, when the device works, the big dipper short message module 3 collects big dipper positioning information (including information such as precision, latitude, height, speed, satellite number for positioning, visible satellite number, UTC time, etc.); the 4G communication module 2 receives and analyzes ship navigation data such as navigation speed, course and positioning information collected by an intelligent terminal of a ship in the inland river and information such as passenger carrying information and emergency call information acquired in a manual input mode, and automatically captures announcement information, safety warning, navigation announcement, navigation information, water level information, weather information and the like in a shore-based management platform; the 4G signal detection module 4 accepts and detects the 4G signal strength and displays it on the display screen 6. The three can simultaneously perform the corresponding program operations. When the detected RSRP is-100 dMb, the main control module 1 is connected with a level conversion circuit between the main control module 1 and the 4G communication module 2, so that signals are matched, and data are transmitted to the shore-based management platform in a bidirectional mode through the 4G communication module (2); when RSRP < -100dMb is detected, the main control module 1 disconnects a level conversion circuit between the main control module 1 and the 4G communication module 2, signals cannot be matched, information data can be temporarily stored in an SD card of the main control module 1 at the moment, the language module 5 reminds the 4G communication to be unsmooth, and manual confirmation is carried out to switch to Beidou short messages for information transmission. After important information such as longitude and latitude and the like is automatically screened out manually or by the main control module 1, the Beidou short message module 3 sends the important information.
Finally, it should be noted that the above detailed description is only for illustrating the technical solution of the patent and not for limiting, although the patent is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the patent can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the patent, which should be covered by the claims of the patent.
Claims (5)
1. The switching method of the communication between the inland ship intelligent terminal 4G and the Beidou short message is characterized by comprising the following steps: the method comprises the following steps:
1) acquiring 4G signals in a navigation area of a inland ship and converting 4G signal strength values into corresponding reference signal received power values RSRP; the RSRP is obtained by processing and converting a 4G signal strength value through an RSRP measurement algorithm;
2) comparing the RSRP detected in the inland ship navigation area with a set RSRP threshold value, and displaying the RSRP value on a display screen;
3) judging whether to switch the communication mode: if the detection value is larger than or equal to the set threshold value, switching of the communication mode is not carried out, and 4G communication is normally used for data transmission; if the detection value is smaller than the set threshold value, the communication mode is switched to Beidou short message communication along with language reminding after manual confirmation.
2. The inland ship intelligent terminal 4G and Beidou short message communication switching method according to claim 1, characterized in that: the RSRP measurement algorithm in the step 1) is as follows:
RSRP＝PT-PN
in the formula, PTIs the average power of signal and noise, PNFor noise power, a is the number of OFDM symbols in a time slot resource, and n is the serial number of the number of OFDM symbols in each frequency domain; k is the number of pilot frequency time-frequency resources on the frequency domain; k is an integer number from 1 to K; y isn(k) To receive a signal; y is*(k) In the form of a conjugate of the received signal.
3. The inland ship intelligent terminal 4G and Beidou short message communication switching method according to claim 1, characterized in that: the specific steps of the step 2) are as follows: the RSRP value detected in the inland ship navigation area is transmitted to a display screen to be displayed, and the comparison result of the detection value and the set threshold value RSRP which is-100 dBm is displayed on the display screen.
4. The inland ship intelligent terminal 4G and Beidou short message communication switching method according to claim 1, characterized in that: the specific steps of the step 3) are as follows: if the RSRP > is-100 dBm, the communication modes are not switched, the controller keeps the connection between the serial port and the level conversion circuit, normal signal matching is maintained, and data receiving and transmission are carried out through the 4G communication module; if the detection value RSRP is less than-100 dBm, the controller disconnects the serial port and the level conversion circuit, so that information cannot be transmitted through the 4G communication module, voice reminding is carried out, and after manual confirmation, the communication mode is switched to Beidou short message communication.
5. A device for realizing the inland ship intelligent terminal 4G and Beidou short message communication switching method according to any one of claims 1-4 is characterized in that: the device comprises a main control module (1), a 4G communication module (2), a Beidou short message module (3), a 4G signal detection module (4), a voice module (5), a display screen (6), a power supply module (7), a 4G antenna (8) and a Beidou antenna (9);
the main control module (1) is used for controlling the work operation of the whole system, and comprises RSRP algorithm processing in the 4G signal detection module (4) and connection control between a serial port between the main control module (1) and the 4G communication module (2) and a level conversion circuit;
the 4G communication module (2) is used for transmitting ship navigation data collected by the inland ship intelligent terminal and information obtained in a manual input mode to the shore-based management platform when the 4G signal detection module (4) detects that RSRP is-100 dBm, and automatically capturing public information in the shore-based management platform;
the 4G signal detection module (4) is used for receiving and detecting the 4G signal intensity in the navigation flowing field of the inland ship;
the Beidou short message module (3) is used for transmitting information to the shore base and receiving the information from the shore base when the 4G signal detection module (4) detects that RSRP is less than-100 dBm;
the power supply module (7) is used for providing respective electric energy in the main control module (1), the 4G communication module (2), the Beidou short message module (3), the 4G signal detection module (4), the voice module (5) and the display screen (6).
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113942623A (en) * | 2021-09-18 | 2022-01-18 | 武汉理工大学 | Intelligent navigation platform and navigation method |
| CN117651309A (en) * | 2023-10-19 | 2024-03-05 | 中铁长江交通设计集团有限公司 | Mountain river intelligent ship bank communication system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581783A (en) * | 2014-12-30 | 2015-04-29 | 融智通科技（北京）股份有限公司 | Communication method for unmanned aerial vehicle |
| CN105812047A (en) * | 2016-03-09 | 2016-07-27 | 南京六九零二科技有限公司 | WIFI communication device based on Beidou satellite |
| WO2018000748A1 (en) * | 2016-06-28 | 2018-01-04 | 深圳大学 | Maritime navigation rescue system based on beidou satellite |
| CN110715648A (en) * | 2018-07-12 | 2020-01-21 | 深圳市蓝海绿洲科技有限公司 | Ocean monitoring system for realizing intelligent network and ocean monitoring equipment thereof |
| CN111212454A (en) * | 2019-12-30 | 2020-05-29 | 广州海达安控智能科技有限公司 | Remote terminal control system capable of intelligently switching data transmission modes and storage medium |
-
2020
- 2020-12-17 CN CN202011493461.9A patent/CN112672294A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104581783A (en) * | 2014-12-30 | 2015-04-29 | 融智通科技（北京）股份有限公司 | Communication method for unmanned aerial vehicle |
| CN105812047A (en) * | 2016-03-09 | 2016-07-27 | 南京六九零二科技有限公司 | WIFI communication device based on Beidou satellite |
| WO2018000748A1 (en) * | 2016-06-28 | 2018-01-04 | 深圳大学 | Maritime navigation rescue system based on beidou satellite |
| CN110715648A (en) * | 2018-07-12 | 2020-01-21 | 深圳市蓝海绿洲科技有限公司 | Ocean monitoring system for realizing intelligent network and ocean monitoring equipment thereof |
| CN111212454A (en) * | 2019-12-30 | 2020-05-29 | 广州海达安控智能科技有限公司 | Remote terminal control system capable of intelligently switching data transmission modes and storage medium |
Non-Patent Citations (2)
| Title |
|---|
| 辛雨等: "LTE-A CSI-RSRP测量算法研究", 《中兴通讯技术》 * |
| 黄利峰等: "北斗短报文和移动互联网在工程船舶管理中的应用", 《港口科技》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113942623A (en) * | 2021-09-18 | 2022-01-18 | 武汉理工大学 | Intelligent navigation platform and navigation method |
| CN117651309A (en) * | 2023-10-19 | 2024-03-05 | 中铁长江交通设计集团有限公司 | Mountain river intelligent ship bank communication system |
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