CN113068157B - Point-to-point communication method with high transmission stability between coasts - Google Patents
Point-to-point communication method with high transmission stability between coasts Download PDFInfo
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- CN113068157B CN113068157B CN202110144497.4A CN202110144497A CN113068157B CN 113068157 B CN113068157 B CN 113068157B CN 202110144497 A CN202110144497 A CN 202110144497A CN 113068157 B CN113068157 B CN 113068157B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The invention discloses a point-to-point communication method with high transmission stability between coasts, which overcomes the problem of insufficient transmission stability during point-to-multipoint transmission in the prior art and comprises four steps of selecting an area with close distance between two points in a plurality of point-to-point systems in a communication system, acquiring CQI channel quality indication, a line drop rate and data transmission rate in each channel in each point-to-point communication link in the area, constructing a transmission stability communication model according to the CQI channel quality indication, the line drop rate and the data transmission rate in each channel to obtain a comprehensive evaluation result and selecting an optimal point as a multipoint relay station according to the evaluation result. The invention can ensure the stable transmission of the whole communication system, avoid the channel waste and the time delay and disconnection condition in the communication system and bring high stability to the point-to-multipoint communication.
Description
Technical Field
The invention relates to the technical field of maritime communication, in particular to a point-to-point communication method with high transmission stability between coasts.
Background
Wireless communication is the main means of marine communication, including cell phone, radio and satellite communication, and is often carried out using cell radio. Point-to-point communication enables information exchange between any two users within the network. After the radio station receives the data with the point-to-point communication identification information, the system number and the address code are compared, and when the system number and the address code are consistent with the local area, the data are transmitted to the user terminal, otherwise, the data are lost and are not transmitted to the user terminal. In point-to-point communication, only 1 user can receive information. A point-to-point connection is a dedicated communication link between two systems or processes. Imagine a line directly connecting two systems. Two systems communicate exclusively on this line. The opposite of point-to-point communication is broadcast, in which one system may transmit to multiple systems. An end-to-end connection refers to a connection between two systems through a switching network. A routing path includes a plurality of point-to-point links. Point-to-multipoint connections over multipoint links are possible. Multipoint means that signals are transmitted from the base station to the subscriber end in a point-to-multipoint manner, and signals are transmitted from the subscriber end to the base station in a point-to-point manner. However, the quality of a transmission channel of each point-to-point link cannot be guaranteed by directly constructing a plurality of point-to-point links from one point to a plurality of points, and some links may have a disconnection condition, so that the transmission stability cannot be guaranteed.
For example, a "point-to-multipoint transmission" disclosed in chinese patent document, having application number CN200480024418.0, has a scheme of performing point-to-multipoint data transmission and retransmission of erroneously decoded data from a transmitting station to a plurality of receiving stations, wherein the retransmitted data is transmitted via at least one communication channel different from the communication channel used for initially transmitting the data. However, in the scheme, the channel quality between each receiving station of the sending station cannot be guaranteed to be in an optimal state from one sending station to a plurality of receiving stations, delay and drop may occur in one or a plurality of channels, and only 1 user can receive information during point-to-point communication.
Disclosure of Invention
The invention aims to overcome the problem of insufficient transmission stability during point-to-multipoint transmission in the maritime communication in the prior art, and provides a point-to-point communication method with high transmission stability among coasts, which is used for evaluating the optimal point among a plurality of points in a detection area among the coasts, improving the communication stability of the point-to-multipoint transmission among the coasts and improving the maritime communication quality.
In order to achieve the purpose, the invention adopts the following technical scheme:
a point-to-point communication method with high transmission stability among coasts comprises the following steps:
s1, selecting a region with a short distance between two points in a plurality of point-to-point systems in the communication system between the sea surface and the shore;
s2, collecting CQI channel quality indication, disconnection rate and data transmission rate in each channel in each point-to-point communication link in the region;
s3, constructing a transmission stability communication model according to the CQI channel quality indication, the disconnection rate and the data transmission rate in each channel to obtain a comprehensive evaluation result;
s4, selecting the optimal point as a multipoint relay station according to the evaluation result;
the communication adopts a radio station mode, a point-to-point system is constructed between the sea surface and the shore, the points are located on the sea surface and the shore, the points comprise moving points and fixed points, and the radio stations comprise coast radio stations, ship radio stations, shipboard communication radio stations, harbor radio stations, maritime navigation land radio stations, ship positioning radio stations, radar beacon radio stations and ship emergency transmitters.
The invention constructs a point-to-multipoint communication system in an area between the sea surface and the shore, selects the optimal point as a relay station according to the channel quality indication, the disconnection rate, the data transmission rate and other factors of each point-to-point, the relay station can be a buoy and a floating platform, and all indexes of the relay station are optimal under comprehensive evaluation, thereby ensuring the transmission stability of the whole communication system, avoiding the channel waste and the time delay and disconnection conditions in the communication system, bringing high stability to the point-to-multipoint communication and improving the quality of the marine communication.
Preferably, S1 includes the steps of: a plurality of point-to-point systems form the whole inter-coast communication system, and areas with dense point-to-point systems are selected in the inter-coast communication system, and the distances between points in the areas are close to ensure that the communication distance is within the stable transmission communication distance.
Preferably, the S2 includes: the CQI channel quality indication is expressed by the error rate of each transmission, the disconnection rate is calculated according to a disconnection rate formula, and the data transmission rate is expressed according to a data transmission rate formula. The three indexes are all expressed by concrete data in a channel, and the data are collected in real time in a plurality of periods, so that the reliability of the data is ensured.
Preferably, the method for acquiring the bit error rate includes: the bit error rate is the number of error symbols/total number of transmission symbols.
Preferably, the formula of the disconnection rate is as follows:
preferably, the data transmission rate formula is:
t denotes a symbol transmission rate, and N denotes a valid value state that one pulse can represent.
Preferably, the transmission stability communication model in S3 is:
q is stability index, n is error rate, l is drop rate, S is data transmission rate, delta,
Gamma is a reference coefficient.
Preferably, S4 includes the steps of:
s41, selecting a channel with the highest stability index;
s42, compares the sending station and the receiving station corresponding to the channel, and selects the station with the largest number of connections with other stations as the relay station.
Therefore, the invention has the following beneficial effects: the invention selects the optimal point as the relay station in a point-to-multipoint communication system according to the channel quality indication, the disconnection rate, the data transmission rate and other factors of each point-to-point, and the relay station has optimal indexes under comprehensive evaluation, thereby ensuring the stable transmission of the whole communication system, avoiding the channel waste and the time delay and disconnection conditions in the communication system, bringing high stability to the point-to-multipoint communication and improving the quality of the maritime communication.
Drawings
Fig. 1 is a flowchart of the present embodiment.
Detailed Description
The invention is further described with reference to the following detailed description and accompanying drawings.
A point-to-point communication method with high transmission stability between coasts, as shown in fig. 1, comprises the following steps:
s1, selecting a region with a short distance between two points in a plurality of point-to-point systems in the communication system;
s1 includes the steps of: a plurality of point-to-point systems form the whole communication system, and areas with dense point-to-point systems are selected in the communication system, and the distances between points in the areas are short, so that the communication system is ensured to be within a stable transmission communication distance.
S2, collecting CQI channel quality indication, disconnection rate and data transmission rate in each channel in each point-to-point communication link in the region;
s2 includes: the CQI channel quality indication is represented by the error rate of each transmission, the disconnection rate is calculated according to a disconnection rate formula, the data transmission rate is represented according to a data transmission rate formula, the three indexes are all represented by specific data in a channel, and the data are collected in real time in a plurality of periods, so that the data reliability is ensured.
S3, constructing a transmission stability communication model according to the CQI channel quality indication, the disconnection rate and the data transmission rate in each channel to obtain a comprehensive evaluation result;
the method for acquiring the bit error rate comprises the following steps: error rate is the number of error symbols/total number of transmitted symbols.
The formula of the disconnection rate is as follows:
the data transmission rate formula is:
t denotes a symbol transmission rate, and N denotes a valid value state that one pulse can represent.
Preferably, the transmission stability communication model in S3 is:
q is stability index, n is error rate, l is drop rate, S is data transmission rate, delta,
Gamma is a reference coefficient.
And S4, selecting the optimal point as the multipoint relay station according to the evaluation result.
S4 includes the steps of:
s41, selecting a channel with the highest stability index;
s42, comparing the sending station and the receiving station corresponding to the channel, and selecting the station with the most connection quantity with other points as a relay station;
the relay station comprises a buoy and a floating platform; the communication adopts the mode of radio station, constructs point-to-point system between sea and bank, the point is located sea and bank, the point includes moving point and fixed point, the radio station includes coast radio station, boats and ships radio station, communication radio station on the ship, harbour radio station, marine navigation land radio station, boats and ships location radio station, radar beacon radio station and the emergent transmitter of boats and ships.
The selected point of the relay station is the optimal point under comprehensive evaluation, the point can be fixed or can move on the sea surface, the quality of communication channels between the point and other stations is good, and time delay and disconnection can be prevented.
The invention selects the optimal point as the relay station in a point-to-multipoint communication system between coasts according to the channel quality indication, the drop rate, the data transmission rate and other factors of each point-to-point, and the relay station has optimal indexes under comprehensive evaluation, thereby ensuring the stable transmission of the whole communication system, avoiding the channel waste and the time delay and drop condition in the communication system, bringing high stability to the point-to-multipoint communication and improving the maritime communication quality.
The above embodiments are intended to illustrate the present invention, but not to limit the scope of the invention, and the skilled engineer may make insubstantial modifications and adjustments to the present invention based on the above disclosure.
Claims (6)
1. A point-to-point communication method with high transmission stability among coasts is characterized by comprising the following steps:
s1, selecting a region with a short distance between two points in a plurality of point-to-point systems in a communication system between the sea surface and the shore, which specifically comprises the following steps: the method comprises the following steps that a plurality of point-to-point systems form the whole inter-coast communication system, and an area with dense point-to-point systems is selected from the inter-coast communication system, and the distance between points in the area is short, so that the stable transmission communication distance is ensured;
s2, collecting CQI channel quality indication, a drop rate and a data transmission rate in each channel in each point-to-point communication link in a region, wherein the CQI channel quality indication is represented by an error rate of each transmission, the drop rate is calculated according to a drop rate formula, the data transmission rate is represented according to a data transmission rate formula, the three indexes are all represented by concrete data in the channel, and the data are collected in real time in a plurality of periods;
s3, constructing a transmission stability communication model according to the CQI channel quality indication, the disconnection rate and the data transmission rate in each channel to obtain a comprehensive evaluation result;
s4, selecting the optimal point as a multipoint relay station according to the evaluation result;
the communication adopts a radio station mode, a point-to-point system is constructed between the sea surface and the shore, the points are located on the sea surface and the shore, the points comprise moving points and fixed points, and the radio stations comprise a coast radio station, a ship communication radio station, a port radio station, a marine navigation land radio station, a ship positioning radio station, a radar beacon radio station and a ship emergency transmitter.
2. The method as claimed in claim 1, wherein the bit error rate is obtained by: error rate is the number of error symbols/total number of transmitted symbols.
3. The method as claimed in claim 1, wherein the drop rate is expressed by the following formula:
4. the point-to-point communication method with high transmission stability between coasts as claimed in claim 1, wherein the data transmission rate formula is:
t denotes a symbol transmission rate, and N denotes a state of a valid value that one pulse can represent.
5. The method of claim 1, wherein the communication model for transmission stability in S3 is:
q is stability meansA number, n is the error rate, l is the drop rate, S is the data transmission rate, δ,
Gamma is a reference coefficient.
6. The point-to-point communication method with high transmission stability between coasts as claimed in claim 1, wherein the S4 comprises the steps of:
s41, selecting a channel with the highest stability index;
s42, comparing the sending station and the receiving station corresponding to the channel, and selecting the station with the most connection quantity with other points as a relay station;
the relay station comprises a buoy and a floating platform.
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