CN112073939A - Communication method and system based on ocean floating platform - Google Patents
Communication method and system based on ocean floating platform Download PDFInfo
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Abstract
The invention discloses a communication method and a system based on an ocean floating platform.A communication network is constructed by respectively taking an underwater carrier, the ocean floating platform, a mother ship and a shore-based data center as a node; determining a source node and a target node which need to perform data transmission, and establishing all communication links from the source node to the target node; and selecting an optimal communication link for data transmission, thereby ensuring the smoothness of local area and remote communication, improving the reliability and stability of data transmission and ensuring the quality of data transmission.
Description
Technical Field
The invention belongs to the technical field of communication, and particularly relates to a communication method and system based on an ocean floating platform.
Background
In the 90 s, collected information transmission of ocean floating platforms is realized by adopting UHF ultra high frequency satellite communication technology in the United states, and the defects that the transmission distance is limited and the transmission distance needs to be increased by adding relay nodes are overcome. In the 90 s, the ocean floating platform developed in China realizes data communication by using a short-wave communication mode at the earliest time, but because the short-wave communication has the limitations of low receiving rate, high power consumption and the like, the communication floating platform gradually fades out the sight of people. With the 1993 opening of the Inmarsat-C satellite system, a FZF2-3 type marine floating platform using the Inmarsat-C system was published in 1995. The data transmission mode of the ocean floating platform has remarkable and excellent progress from short wave communication to communication by relying on a satellite communication terminal based on Argos and Inmarsat-C systems, but the use of the Argos and Inmarsat-C systems is limited due to high use cost. In recent years, iridium communication systems have become widespread, and have a disadvantage of poor real-time performance.
From the above, the current communication method based on the ocean floating platform has poor real-time performance and reliability, and cannot ensure reliable and stable transmission of data.
Disclosure of Invention
The invention provides a communication method based on an ocean floating platform, which improves the reliability of data transmission.
In order to solve the technical problems, the invention adopts the following technical scheme:
a communication method based on a marine floating platform comprises the following steps:
respectively taking an underwater carrier, an ocean floating platform, a mother ship and a shore-based data center as a node to construct a communication network;
determining a source node and a target node which need to perform data transmission, and establishing all communication links from the source node to the target node;
and selecting the optimal communication link for data transmission.
Further, the selecting an optimal communication link specifically includes: detecting the signal-to-noise ratio, the bit error rate and the transmission speed of each communication link from a source node to a target node; judging the communication quality of the communication link according to the detected signal-to-noise ratio, the bit error rate and the transmission speed; and selecting the communication link with the optimal communication quality as the optimal communication link.
Further, the communication quality of the communication link is judged according to the detected signal-to-noise ratio, the bit error rate and the transmission speed; the method specifically comprises the following steps: calculating a communication quality value of each communication link from the source node to the target node; communication quality value = signal-to-noise ratio × k1+ transmission speed × k2+ (1/bit error rate) × k 3; wherein k1 is the weight of the signal-to-noise ratio, k2 is the weight of the transmission speed, and k3 is the weight of 1/bit error rate; k1+ k2+ k3= 1; and judging the communication link with the maximum communication quality value as the communication link with the optimal communication quality.
Further, before the calculating of the communication quality value of each communication link from the source node to the target node, the method further comprises: judging whether the error rate of each communication link from the source node to the target node reaches a preset high value or not; if the error rate of each communication link from the source node to the target node reaches a preset high value, reducing the bandwidth, re-detecting the error rate of each communication link from the source node to the target node until the error rate of each communication link is smaller than the preset high value, and then calculating the communication quality value of each communication link from the source node to the target node, wherein the error rate of each communication link from the source node to the target node is smaller than the preset high value.
Still further, before the calculating the communication quality value of each communication link from the source node to the target node, the method further comprises: judging whether the signal-to-noise ratio of each communication link from the source node to the target node does not reach a preset low value; if the signal-to-noise ratio of each communication link from the source node to the target node does not reach the preset low value, reducing the bandwidth, re-detecting the signal-to-noise ratio of each communication link from the source node to the target node until the signal-to-noise ratio of the communication link reaches the preset low value, and then calculating the communication quality value of each communication link when the signal-to-noise ratio from the source node to the target node reaches the preset low value.
Further, in the data transmission process, the optimal communication link is selected again at set time intervals.
Still further, during the data transmission, the optimal communication link is reselected when the type of data sent by the source node changes.
A marine floating platform based communication system comprising:
an underwater carrier provided with a carrier gateway and a carrier communication component;
the marine floating platform is provided with a platform gateway and a platform communication component;
a parent vessel provided with a parent vessel gateway and a parent vessel communication component;
a shore-based data center provided with a shore-based gateway and a shore-based communication module;
the carrier gateway, the platform gateway, the mother ship gateway and the shore-based gateway cooperate to execute the communication method.
Further, the platform communication component comprises: the satellite communication assembly is used for communicating with the shore-based communication module; the Beidou short message communication assembly is used for communicating with the shore-based communication module; the MESH communication component is used for communicating with the mother ship communication component; the LORA communication component is used for communicating with the mother ship communication component; the ultra-short wave communication assembly is used for communicating with the mother ship communication assembly; the WIFI communication component is used for communicating with the mother ship communication component; an underwater acoustic communication component for communicating with the carrier communication component; an optical communication component for communicating with the carrier communication component.
Still further, the platform gateway sets a sleep time and a wake-up time; when the sleep time is reached, the skynet satellite communication assembly and the Beidou short message communication assembly of the platform communication assembly keep working states, and the other communication assemblies of the platform communication assembly enter a sleep mode; when the wake-up time is reached, the communication component in the sleep mode is woken up.
Compared with the prior art, the invention has the advantages and positive effects that: the communication method and the system based on the ocean floating platform construct a communication network by taking an underwater carrier, the ocean floating platform, a mother ship and a shore-based data center as nodes respectively; determining a source node and a target node which need to perform data transmission, and establishing all communication links from the source node to the target node; and selecting an optimal communication link for data transmission, thereby ensuring the smoothness of local area and remote communication, improving the reliability and stability of data transmission and ensuring the quality of data transmission.
Other features and advantages of the present invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a block diagram of an embodiment of a marine floating platform based communication system in accordance with the present invention;
FIG. 2 is a block diagram of the structure of the ocean floating platform of FIG. 1;
FIG. 3 is a flow chart of one embodiment of a marine floating platform based communication method proposed by the present invention;
fig. 4 is a flow chart of a part of the steps in fig. 3.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and examples.
The invention provides a communication method and a communication system based on an ocean floating platform aiming at the problem of poor data transmission reliability, and the reliability and the stability of data transmission are ensured by selecting an optimal communication link. The communication method and system based on the ocean floating platform are described in detail in the mode of specific embodiments.
The communication system based on the ocean floating platform of the embodiment mainly comprises an underwater carrier, the ocean floating platform, a mother ship, a shore-based data center and the like, and is shown in fig. 1.
The underwater carrier is provided with a carrier gateway and a carrier communication component, and the carrier gateway is connected with the carrier communication component.
The ocean floating platform is provided with a platform gateway and a platform communication component, and the platform gateway is connected with the platform communication component.
A parent vessel provided with a parent vessel gateway and a parent vessel communication component; the mother ship comprises an unmanned aerial vehicle and an unmanned ship. The mother ship gateway is connected with the mother ship communication component.
And the shore-based data center is provided with a shore-based gateway and a shore-based communication module, and the shore-based gateway is connected with the shore-based communication module.
The carrier gateway, the platform gateway, the mother ship gateway and the shore-based gateway cooperate to execute the following communication method. One of the gateways (e.g., a platform gateway or a shore-based gateway) may be selected as a master gateway, and the remaining gateways are slave gateways, with the master gateway controlling the operation of each slave gateway. Each gateway is an intelligent communication gateway.
The underwater carrier is communicated with the ocean floating platform, the ocean floating platform is communicated with the mother ship, the mother ship is communicated with the shore-based data center, and the ocean floating platform can also be directly communicated with the shore-based data center, so that a communication network is formed.
The ocean floating platform is as connecting aerial, surface of water and underwater key information node, in order to link up reliably carrier and bank base data center's communication link under water, in this embodiment, ocean floating platform's platform communication subassembly includes sky leads to satellite communication subassembly, big dipper short message communication subassembly, MESH communication subassembly, LORA communication subassembly, ultrashort wave communication subassembly, WIFI communication subassembly, underwater acoustic communication subassembly, optical communication subassembly etc. is connected with the platform gateway respectively, see that fig. 2 shows.
(1) The satellite communication assembly is used for communicating with the shore-based communication module; the satellite communication mode is suitable for long-distance transmission on the water surface, can transmit a large amount of data information and voice information, and realizes communication between the ocean floating platform and the shore-based data center.
(2) The Beidou short message communication assembly is used for communicating with the shore-based communication module; the Beidou short message communication mode is suitable for long-distance transmission on the water surface, can transmit a small amount of early warning information and control instructions, and realizes communication between the ocean floating platform and the shore-based data center.
(3) The MESH communication component is used for communicating with the mother ship communication component; the MESH communication mode can transmit information such as images, voice and the like within a range of several kilometers to dozens of kilometers on the water surface.
(4) The LORA communication component is used for communicating with the mother ship communication component; the LORA communication scheme can transmit moderate amounts of data information over several kilometers of water surface.
(5) The ultra-short wave communication assembly is used for communicating with the mother ship communication assembly; the LORA communication scheme can transmit moderate amounts of data information over several kilometers of water surface.
(6) The WIFI communication component is used for communicating with the mother ship communication component; the WIFI communication mode can transmit a large amount of information such as images, voice, hydrological weather and the like in a short distance on the water surface.
(7) An underwater acoustic communication component for communicating with the carrier communication component; the position information, state information and the like of the underwater carrier can be transmitted to the ocean floating platform within a range of several kilometers in an underwater acoustic communication mode.
(8) The optical communication assembly is used for communicating with the carrier communication assembly, and a large amount of marine environment information collected by the underwater carrier can be transmitted to the marine floating platform in a short-distance range in an optical communication and electromagnetic coupling communication mode.
Therefore, the underwater carrier communicates with the ocean floating platform in an underwater acoustic communication mode and an optical communication mode; the ocean floating platform is communicated with the mother ship through an MESH communication mode, an LORA communication mode, an ultrashort wave communication mode and a WIFI communication mode; the mother ship communicates with a shore-based data center in an skynet satellite communication mode and a Beidou short message communication mode; the ocean floating platform can also communicate with a shore-based data center in an all-weather satellite communication mode and a Beidou short message communication mode.
The underwater carrier transmits early warning information, hydrological characteristic information, underwater sound original data and the like to the ocean floating platform in an underwater sound communication mode and an optical communication mode; there are three ways to transfer from a floating offshore platform to a shore-based data center: firstly, the ocean floating platform directly sends information to a shore-based data center through an all-weather satellite communication assembly and a Beidou short message communication assembly; secondly, the ocean floating platform sends information to the mother ship through the MESH communication component, the LORA communication component and the ultrashort wave communication component, and then the sky-through satellite communication component on the mother ship sends the information to the shore-based data center; and thirdly, the ocean floating platform sends information to the unmanned aerial vehicle and the unmanned ship through the MESH communication assembly, the LORA communication assembly, the ultrashort wave communication assembly and the WIFI communication assembly, and then the mother ship retrieves the unmanned aerial vehicle and the unmanned ship and sends the information to the shore-based data center through the satellite communication assembly of the mother ship. I.e. the uplink communication link is: underwater vehicle → ocean floating platform → shore-based data center, or underwater vehicle → ocean floating platform → mother ship (including unmanned aerial vehicle and unmanned vehicle) → shore-based data center; the downlink communication link from the shore-based data center to the underwater vehicle is the reverse of the uplink described above.
The platform communication component of the ocean floating platform comprises the communication component, and the complementarity of each communication mode in the aspects of bandwidth, transmission distance, economic cost and the like is comprehensively considered. The optical communication, MESH and WIFI communication modes can transmit large amount of information, and other communication modes transmit small amount of key information. The platform gateway is a core component of the ocean floating platform, and the communication components in the platform communication components are uniformly managed and controlled by the platform gateway, so that the functions of sending hydrological information and early warning information to a shore-based data center, receiving a remote control instruction from a satellite, receiving Beidou short messages and positioning time service information, carrying out underwater acoustic communication and optical communication with an underwater carrier and the like are realized.
The platform gateway of the ocean floating platform is a core component of the ocean floating platform, can perform message conversion among various network protocols, can completely analyze the content of a message and intelligently convert the message into another protocol, and plays a role in core information processing and bridging, link control and power consumption management. The gateway is internally provided with a configuration program, can set communication protocols running on different physical channels for data acquisition, and can autonomously set the physical address, channel address or parameter name and the like of data equipment to be acquired. For the data collected in the device, the gateway running program can perform various operations in various ways, including: data transformation, data filtering, arithmetic processing, historical data storage, statistical processing, alarm processing, service request and the like. For processed data, the gateway running program can forward the data to the shore-based data center according to a configured mode, including a physical connection mode, a data forwarding protocol type, a station physical address, a forwarding data channel address or a parameter name.
The communication system based on the ocean floating platform of the embodiment is characterized in that a plurality of communication modes are fused based on a gateway, multimode wireless communication links such as a satellite communication assembly, a Beidou short message communication assembly, an MESH communication assembly (MESH wireless MESH network communication assembly), a LORA (Long Range Radio) communication assembly, an ultrashort wave communication assembly, a WIFI communication assembly, an underwater acoustic communication assembly and an optical communication assembly are effectively fused through the gateway, a real-time, reliable, seamless ocean full-space bidirectional communication link combining narrow-band and broadband communication is built between a shore-based data center → a maneuvering deployed mother ship (including unmanned ship and unmanned plane) → maneuvering deployed ocean floating platform → maneuvering deployed underwater motion carrier, and all-weather communication modes are realized between the ocean full-space information elements and the shore-based data center through the link, so that all-time and all-weather communication modes are realized between the ocean full-space information elements and the shore-based data center, The effect of continuous bidirectional information transmission in all-time and high reliability.
The communication method and the system based on the ocean floating platform of the embodiment get rid of the defect of a single communication technical means of the traditional ocean floating platform, ensure that the ocean floating platform keeps reliable, real-time and bidirectional information interaction with a shore-based data center under various severe ocean environments, and have great significance for building all-weather and all-day ocean three-dimensional observation networks.
After the ocean floating platform is electrified, the platform gateway of the ocean floating platform automatically carries out self-checking on each communication assembly, and the working state of each communication assembly is identified. The ocean floating platform works on the sea surface and can only be powered by a battery. The reduction of the electric energy consumption can prolong the service life of the battery, improve the endurance capacity of equipment, reduce the period of replacing a new battery, and enable the ocean floating platform to have higher practicability, and meanwhile, the lower energy consumption means less heating, and the improvement of the stability and the reliability is facilitated. Therefore, power consumption considerations are a necessary prerequisite for the design of marine floating platforms. In order to save energy and electricity, a low-power management strategy is realized through a platform gateway:
the platform gateway sets a dormancy moment and a wake-up moment; when the dormancy moment is reached, the skynet satellite communication assembly and the Beidou short message communication assembly of the platform communication assembly keep working states, so that a control instruction of a shore-based data center can be received conveniently; the rest communication components of the platform communication component enter a sleep mode; when the wake-up time is reached, the communication component in the sleep mode is woken up. As another preferred design scheme of this embodiment, when the platform communication component is in an idle state and no data is transmitted, each communication component enters a sleep mode; when there is data transmission, the communication component in the sleep mode is awakened again.
According to the low-power management strategy, the power supply mode of the time-sharing, branching and subassembly assembly can save a large amount of power consumption. On the ocean floating platform, the electric energy provided by the battery is transmitted to the power management circuit, and the working voltage is output after being processed by the power management circuit to supply power for each electric appliance on the platform. The operation of each communication assembly is controlled through a power supply control circuit of the platform gateway, and the power supply of each communication assembly is controlled through controlling the power supply voltage stabilization output module.
The communication method based on the ocean floating platform mainly comprises the following steps, and is shown in fig. 3.
Step S1: and respectively taking the underwater carrier, the ocean floating platform, the mother ship and the shore-based data center as a node to construct a communication network.
The underwater carrier, the ocean floating platform, the mother ship and the shore-based data center are all more than one, and each underwater carrier, each ocean floating platform, each mother ship and each shore-based data center are all one node of the communication network.
Step S2: determining a source node and a target node which need to carry out data transmission, and establishing all communication links from the source node to the target node.
And assuming that data needs to be transmitted from one underwater carrier to a shore-based data center, determining that the underwater carrier is a source node, the shore-based data center is a target node, and establishing all communication links from the source node to the target node, including a communication link of the underwater carrier-ocean floating platform-shore-based data center, a communication link of the underwater carrier-ocean floating platform-mother ship-shore-based data center and the like.
One complete link from the source node to the target node is called a communication link, other links are called sub-links, links between underwater carriers-ocean floating platforms, ocean floating platforms-shore-based data centers, ocean floating platforms-mother ships and mother ships-shore-based data centers are called sub-links, and each communication link comprises a plurality of sub-links.
Suppose there are 4 underwater vehicles (called F1, F2, F3, F4), 1 ocean floating platform (called E1), 2 mother ships (called C1, C2), 1 shore-based data center (called a 1).
The source node is F1, the target node is A1, and the communication link from F1 to A1 is obtained by the following two steps:
(1) the sublink from F1 to E1 includes: f1 → E1;
a sub-link from F1 to F1 after being transferred by other underwater carriers, such as F1 → F2/F3/F4 → E1; f1 → F2 → F3 → E1; f1 → F2 → F3 → F4 → E1, etc.;
(2) the sublink from E1 to a1 includes:
E1→A1；
E1→C1→A1；E1→C1→C2→A1；
E1→C2→A1；E1→C2→C1→A1；
and (3) selecting one sub-link from the step (1), and combining one sub-link from the step (2) to form a communication link. Therefore, combining the sub-links obtained from (1) and (2) can obtain a communication link from F1 to a 1.
For example,
F1→E1→A1；
F1→E1→C2→A1；
F1→F3→F4→E1→C2→A1；……。
step S3: and selecting an optimal communication link from all communication links from the source node to the target node for data transmission.
In the communication method based on the ocean floating platform, an underwater carrier, the ocean floating platform, a mother ship and a shore-based data center are respectively used as a node to construct a communication network; determining a source node and a target node which need to perform data transmission, and establishing all communication links from the source node to the target node; and selecting an optimal communication link for data transmission, thereby ensuring the smoothness of local area and remote communication, improving the reliability and stability of data transmission and ensuring the quality of data transmission.
In the present embodiment, selecting the optimal communication link specifically includes the following steps, which are shown in fig. 4.
S31: and detecting the signal-to-noise ratio, the bit error rate and the transmission speed of each communication link from the source node to the target node.
When the source node F1 is ready to send data to the target node a1, F1 sends signaling detection information to all communication links F1 to a1, and then detects the signal-to-noise ratio, bit error rate, transmission speed of each communication link.
S32: judging the communication quality of the communication link according to the detected signal-to-noise ratio, the bit error rate and the transmission speed; and selecting the communication link with the optimal communication quality as the optimal communication link.
And taking the signal-to-noise ratio, the bit error rate and the transmission speed of the communication link as index values for evaluating the communication quality of the communication link, and taking the communication link with the highest communication quality as an optimal communication link. By designing S31-S32, the communication quality of the communication link is objectively, truly and accurately judged through the signal-to-noise ratio, the bit error rate and the transmission speed, and the optimal communication link is conveniently and accurately selected.
S32 specifically includes the following steps:
s321: calculating a communication quality value of each communication link from the source node to the target node;
communication quality value = signal-to-noise ratio × k1+ transmission speed × k2+ (1/bit error rate) × k 3; wherein k1 is the weight of the signal-to-noise ratio, k2 is the weight of the transmission speed, and k3 is the weight of 1/bit error rate; k1+ k2+ k3= 1.
For example, k1=0.4, k2=0.3, k3= 0.3;
s322: after the communication quality values of all communication links from the source node to the target node are calculated, the communication link with the largest communication quality value is judged to be the communication link with the best communication quality.
Through designing S321-S322, the communication quality of the communication link is quantified, the communication quality of the communication link can be accurately and objectively judged, and the communication link with the optimal quality can be obtained relatively quickly.
Each gateway participates in detection of signal to noise ratio, bit error rate and transmission speed of a communication link of the gateway, detection results are sent to the main gateway, the main gateway judges the optimal communication link and then sends the optimal communication link to each gateway. Namely, all gateways cooperatively detect the signal-to-noise ratio, the bit error rate and the transmission speed of the communication link to find out the optimal communication link.
As another preferable design of this embodiment, before calculating the communication quality value of each communication link from the source node to the target node, the communication method further includes: and judging whether the error rate of each communication link from the source node to the target node reaches a preset high value or not. And if the error rate of each communication link from the source node to the target node reaches a preset high value, which indicates that the accuracy of data transmission is low, reducing the bandwidth, re-detecting the error rate of each communication link from the source node to the target node until the error rate of each communication link is less than the preset high value, and then calculating the communication quality value of each communication link from the source node to the target node, wherein the error rate of each communication link from the source node to the target node is less than the preset high value. At the moment, only the communication quality value of the communication link with the error rate smaller than the preset high value is calculated, so that the calculated amount is reduced, and the time is saved. The embodiment adopts bandwidth dynamic control to ensure continuous and reliable communication.
For example, when the communication quality of all communication links deteriorates and the error rate is very high and information cannot be transmitted effectively and reliably, the communication transmission bandwidth is automatically reduced, and the error rate of communication transmission is reduced by transmitting information at a low speed, so that the communication quality of the communication links meets the basic information transmission requirement, and stable and reliable information transmission is realized. When the communication quality of the communication link is recovered, the gateway automatically adjusts the communication transmission bandwidth, and the communication transmission efficiency is improved.
As another preferable design of this embodiment, before calculating the communication quality value of each communication link from the source node to the target node, the communication method further includes: and judging whether the signal-to-noise ratio of each communication link from the source node to the target node does not reach a preset low value. If the signal-to-noise ratio of each communication link from the source node to the target node does not reach the preset low value, reducing the bandwidth, re-detecting the signal-to-noise ratio of each communication link from the source node to the target node until the signal-to-noise ratio of the communication link reaches the preset low value, and then calculating the communication quality value of each communication link when the signal-to-noise ratio from the source node to the target node reaches the preset low value. At the moment, only the communication quality value of the communication link with the signal-to-noise ratio reaching the preset low value is calculated, so that the calculated amount is reduced, and the time is saved. The embodiment adopts bandwidth dynamic control to ensure continuous and reliable communication.
In the embodiment, the data compression and encryption algorithm is adopted to process the transmission data, so that the data is transmitted safely and efficiently. The data compression encryption algorithm can compress information content according to the repeated content condition in the data packet, and reduce the length of the data packet.
Since the communication quality of a sub-link may change during the communication process, in order to further ensure the communication quality, the optimal communication link is reselected every set time (e.g. 30 seconds) during the data transmission process, that is, the selection of the optimal communication link is dynamic.
For example, when the communication quality of a sub-link is degraded, the gateway corresponding to the node detects and calculates the signal-to-noise ratio, the bit error rate, and the transmission speed of the subsequent link in real time, reselects the optimal communication link, and completes information transmission. The initially selected optimal communication link is for example: f1 → F3 → E1 → C2 → a1, but during the communication, the communication quality of F3 → E1 deteriorates, and at this time, the gateway of F3 detects and calculates in real time the communication quality of the communication links from F3 → F4 → E1 → C2 → a1 or F3 → F2 → E1 → C2 → a1 or F3 → F1 → E1 → C2 → a1, and the like, selects the optimal communication link therefrom, and transmits the information to a 1.
Because the types of the transmitted data are different and the applicable communication modes are also different, in the data transmission process, when the type of the data sent by the source node is changed, the optimal communication link is reselected. For example, the ocean floating platform and the mother ship can communicate through a MESH communication assembly, a LORA communication assembly, an ultra-short wave communication assembly and a WIFI communication assembly; when the data type is image data or voice data, the communication can be carried out by a MESH communication component or a LORA communication component; when the data type is medium-sized text data, communication through the LORA communication module or the ultra-short wave communication module may be selected. Therefore, when the type of data to be transmitted is changed, a proper communication component is selected according to the type of the data, and the optimal communication link is reselected, so that the data transmission communication quality is improved.
The gateway of each node is responsible for supporting the dynamic routing of the wireless communication network and ensuring the survivability of the network communication link. The shore-based data center can manually set and modify the routing relationship between the wireless communication links by adopting a mode of combining fixed routing and flooding-on-demand routing on a routing protocol.
The wireless communication transmission protocol specification of the gateway adopts a standard SLIP protocol. Adding a special mark byte END at the head and tail of each equipment information frame, and packaging into SLIP frames. The flag byte END is encoded as C0H. If a byte in the device information frame is the same as C0H, the byte is replaced with DBH or DCH. If a byte in the device information frame is the same as DBH, the byte is replaced with DBH or DDH.
And the gateway control main program starts to run after the equipment is powered on, and the creation and initialization of the control logic class are completed. After configuration is finished, the loop of equipment management class is entered immediately, the signal state and the signal intensity of each communication link are checked, and the message queue is inquired, processed and distributed. Combining with the hardware design scheme and the logic control class division, the main program can continuously and circularly inquire the message queue, and when the message queue has messages, the messages are distributed, including the judgment of the message types, so that the forwarding of the messages or the execution of commands is completed.
The communication method and the system based on the ocean floating platform achieve the purpose of real-time transmission of various information elements in the ocean full space, and realize efficient and reliable two-way communication between flexibly deployed underwater, water surface and aerial information nodes and a shore-based data center.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.
Claims (10)
1. A communication method based on an ocean floating platform is characterized in that: the method comprises the following steps:
respectively taking an underwater carrier, an ocean floating platform, a mother ship and a shore-based data center as a node to construct a communication network;
determining a source node and a target node which need to perform data transmission, and establishing all communication links from the source node to the target node;
and selecting the optimal communication link for data transmission.
2. The communication method according to claim 1, wherein: the selecting the optimal communication link specifically includes:
detecting the signal-to-noise ratio, the bit error rate and the transmission speed of each communication link from a source node to a target node;
judging the communication quality of the communication link according to the detected signal-to-noise ratio, the bit error rate and the transmission speed; and selecting the communication link with the optimal communication quality as the optimal communication link.
3. The communication method according to claim 2, wherein: judging the communication quality of the communication link according to the detected signal-to-noise ratio, bit error rate and transmission speed; the method specifically comprises the following steps:
calculating a communication quality value of each communication link from the source node to the target node; communication quality value = signal-to-noise ratio × k1+ transmission speed × k2+ (1/bit error rate) × k 3; wherein k1 is the weight of the signal-to-noise ratio, k2 is the weight of the transmission speed, and k3 is the weight of 1/bit error rate; k1+ k2+ k3= 1;
and judging the communication link with the maximum communication quality value as the communication link with the optimal communication quality.
4. The communication method according to claim 3, wherein: before the calculating of the communication quality value of each communication link from the source node to the target node, the method further comprises:
judging whether the error rate of each communication link from the source node to the target node reaches a preset high value or not;
if the error rate of each communication link from the source node to the target node reaches a preset high value, reducing the bandwidth, re-detecting the error rate of each communication link from the source node to the target node until the error rate of each communication link is smaller than the preset high value, and then calculating the communication quality value of each communication link from the source node to the target node, wherein the error rate of each communication link from the source node to the target node is smaller than the preset high value.
5. The communication method according to claim 3, wherein: before the calculating of the communication quality value of each communication link from the source node to the target node, the method further comprises:
judging whether the signal-to-noise ratio of each communication link from the source node to the target node does not reach a preset low value;
if the signal-to-noise ratio of each communication link from the source node to the target node does not reach the preset low value, reducing the bandwidth, re-detecting the signal-to-noise ratio of each communication link from the source node to the target node until the signal-to-noise ratio of the communication link reaches the preset low value, and then calculating the communication quality value of each communication link when the signal-to-noise ratio from the source node to the target node reaches the preset low value.
6. The communication method according to any one of claims 1 to 5, characterized in that: and in the data transmission process, reselecting the optimal communication link at set time intervals.
7. The communication method according to any one of claims 1 to 5, characterized in that: and in the data transmission process, when the type of the data sent by the source node is changed, the optimal communication link is reselected.
8. A communication system based on ocean floating platform is characterized in that: the method comprises the following steps:
an underwater carrier provided with a carrier gateway and a carrier communication component;
the marine floating platform is provided with a platform gateway and a platform communication component;
a parent vessel provided with a parent vessel gateway and a parent vessel communication component;
a shore-based data center provided with a shore-based gateway and a shore-based communication module;
wherein the carrier gateway, platform gateway, mother ship gateway, shore-based gateway cooperate to perform the communication method of any of claims 1 to 7.
9. The communication system of claim 8, wherein: the platform communication assembly comprises:
the satellite communication assembly is used for communicating with the shore-based communication module;
the Beidou short message communication assembly is used for communicating with the shore-based communication module;
the MESH communication component is used for communicating with the mother ship communication component;
the LORA communication component is used for communicating with the mother ship communication component;
the ultra-short wave communication assembly is used for communicating with the mother ship communication assembly;
the WIFI communication component is used for communicating with the mother ship communication component;
an underwater acoustic communication component for communicating with the carrier communication component;
an optical communication component for communicating with the carrier communication component.
10. The communication system of claim 9, wherein: the platform gateway sets a dormancy moment and a wakeup moment;
when the sleep time is reached, the skynet satellite communication assembly and the Beidou short message communication assembly of the platform communication assembly keep working states, and the other communication assemblies of the platform communication assembly enter a sleep mode;
when the wake-up time is reached, the communication component in the sleep mode is woken up.
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