CN114727369B - Shipborne user communication method, device and system, electronic equipment and storage medium - Google Patents

Shipborne user communication method, device and system, electronic equipment and storage medium Download PDF

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Publication number
CN114727369B
CN114727369B CN202210423827.8A CN202210423827A CN114727369B CN 114727369 B CN114727369 B CN 114727369B CN 202210423827 A CN202210423827 A CN 202210423827A CN 114727369 B CN114727369 B CN 114727369B
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base station
shipborne
user terminal
board
communication system
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CN114727369A (en
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李香玲
时文婧
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Beijing University of Chemical Technology
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Beijing University of Chemical Technology
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/391—Modelling the propagation channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/04—Arrangements for maintaining operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a shipborne user communication method, a device, a system, electronic equipment and a storage medium. According to the method, the recommended base station serving the shipborne user terminal can be determined by solving the communication optimization model for maximizing the total achievable rate, so that the maximum total achievable rate of all shipborne user terminals on the target ship is ensured, and the broadband user experience of each shipborne user terminal is improved.

Description

Shipborne user communication method, device and system, electronic equipment and storage medium
Technical Field
The present invention relates to the field of offshore wireless communications technologies, and in particular, to a method, an apparatus, a system, an electronic device, and a storage medium for on-board user communications.
Background
There is an increasing demand for high-speed communication by offshore shipborne users. Broadband coverage is not easily achieved because of the difficulty in deployment of the communication infrastructure on the ocean. Satellite communication networks provide communication services for global offshore shipborne users, but do not meet the high-speed communication needs of offshore shipborne users. For this reason, an offshore communication system for enabling communication of on-board subscribers has been attracting attention.
Currently, the existing work improves the communication rate of an offshore communication system by methods of deploying an onshore base station along the coast, deploying an onboard base station on a ship, deploying an air base station by means of an unmanned aerial vehicle and the like and combining techniques of power control, multiple antennas, non-orthogonal multiple access and the like, but the high-speed communication requirement of offshore shipborne users cannot be met, and the broadband communication experience of the shipborne users is affected.
Disclosure of Invention
The invention provides a ship-borne user communication method, a device, a system, electronic equipment and a storage medium, which are used for solving the defects in the prior art.
The invention provides a ship-borne user communication method, which comprises the following steps:
Acquiring motion information of a target ship at the current moment, motion information of a shipborne user terminal of the target ship and position information of an air base station at the moment before the current moment;
inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total achievable rate, and solving the communication optimization model based on the rate constraint of the air base station on an access side in an offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station;
and sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station.
According to the on-board user communication method provided by the invention, the communication optimization model is solved based on the rate constraint of the air base station on the access side on the backhaul side in the offshore communication system, the rate constraint of the on-board base station on the access side on the backhaul side in the offshore communication system and the rate requirement constraint of the on-board user terminal, so as to obtain the recommended base station for serving the on-board user terminal with the maximum total achievable rate at the current moment, and the method comprises the following steps:
Determining a transmit power constraint of the on-board base station and a transmit power constraint of the air base station;
determining the position information constraint of the aerial base station, and solving the communication optimization model based on the transmitting power constraint of the shipborne base station, the transmitting power constraint of the aerial base station, the position information constraint, the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the shipborne base station on the access side in the backhaul side in the offshore communication system and the rate requirement constraint to obtain the recommended base station, the position information of the aerial base station at the current moment, the transmitting power of the shipborne base station and the transmitting power of the aerial base station.
According to the on-board user communication method provided by the invention, the motion information of the target ship at the current moment is predicted based on the motion information of the target ship at the historical moment, and the motion information of the on-board user terminal at the current moment is predicted based on the motion information of the on-board user terminal at the historical moment;
wherein the historical time is a time before the current time.
According to the on-board user communication method provided by the invention, the return side path of the air base station in the offshore communication system comprises a wireless return path provided by an onshore base station in the offshore communication system for the air base station or a wireless return path provided by a satellite in the offshore communication system for the air base station;
the return side path of the shipborne base station in the offshore communication system comprises a wireless return path provided by the onshore base station for the shipborne base station or a wireless return path provided by the satellite for the shipborne base station.
According to the on-board user communication method provided by the invention, the target ship comprises a plurality of on-board user terminals, and each on-board user terminal is provided with communication service by one target base station;
the target base station is the on-board base station or the air base station.
The invention also provides an on-board user communication device, comprising:
the information acquisition module is used for acquiring the motion information of a target ship at the current moment, the motion information of a shipborne user terminal of the target ship and the position information of an air base station at the moment before the current moment;
the solving module is used for inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total reachable rate, and solving the communication optimization model based on the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total reachable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station;
And the sending module is used for sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station.
The invention also provides an on-board user communication system, comprising: an offshore communication system comprising an onshore base station, an airborne base station, an onboard base station, and a satellite;
one of the onshore base station, the aerial base station or the shipboard base station is provided with the shipboard user communication device;
the on-board user communication device is in communication connection with the other on-shore base station, the air base station, the on-board base station and the on-board user terminal.
The invention also provides an electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the on-board user communication method as described in any one of the above when executing the program.
The invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which when executed by a processor implements a method of on-board user communication as described in any of the above.
The invention also provides a computer program product comprising a computer program which when executed by a processor implements an on-board user communication method as described in any one of the above.
According to the shipborne user communication method, device, system, electronic equipment and storage medium, firstly, motion information of a target ship at the current moment, motion information of a shipborne user terminal of the target ship and position information of an air base station at the previous moment are obtained, a communication optimization model for maximizing the total reachable rate is introduced, the motion information of the target ship at the current moment, the motion information of the shipborne user terminal and the position information of the air base station at the previous moment are input into the communication optimization model, and are solved based on rate constraint, so that a recommended base station of the shipborne user terminal with the maximum total reachable rate is obtained at the current moment; and finally, sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate based on the recommended base station. According to the method, the recommended base station serving the shipborne user terminal can be determined by solving the communication optimization model for maximizing the total achievable rate, so that the maximum total achievable rate of all shipborne user terminals on the target ship is ensured, the communication rate of each shipborne user terminal on the target ship can be improved, and the broadband user experience of each shipborne user terminal is improved.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious to those skilled in the art that other drawings can be obtained according to these drawings without inventive effort.
FIG. 1 is a flow chart of an on-board user communication method provided by the invention;
FIG. 2 is a diagram showing the comparison of the effects of the communication method of the on-board user provided by the invention;
FIG. 3 is a schematic diagram of the configuration of the on-board subscriber communication device provided by the present invention;
FIG. 4 is a schematic diagram of the configuration of the on-board subscriber communication system provided by the present invention;
fig. 5 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Since wireless backhaul is essential to both the air base station and the on-board base station at sea, its communication rate is limited, affecting the broadband communication experience of the on-board user. Based on the above, the embodiment of the invention provides a ship-borne user communication method.
Fig. 1 is a flow chart of a communication method of an on-board user according to an embodiment of the present invention, as shown in fig. 1, the method includes:
s1, acquiring motion information of a target ship at the current moment, motion information of a ship-borne user terminal of the target ship and position information of an air base station at the moment before the current moment;
s2, inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total achievable rate, and solving the communication optimization model based on the rate constraint of the air base station on an access side in an offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate requirement constraint of the shipborne user terminal at the backhaul side, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station;
And S3, sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station.
Specifically, in the on-board user communication method provided in the embodiment of the present invention, the execution body is an on-board user communication device, and the device may be configured in one of an on-shore base station, an air base station or an on-board base station in an offshore communication system, or may be configured in a cloud device, which is not limited herein specifically.
In an offshore communication system, the number of on-shore, off-air and on-board base stations may be one or more. The offshore communication system comprises a satellite besides an onshore base station, an aerial base station and a shipborne base station. The on-board user equipment can be directly in communication connection with the air base station or the on-board base station, and the on-board base station or the satellite can provide wireless backhaul service for the air base station or the on-board base station. Here, the correspondence between the onshore base station or satellite and the aerial base station or shipborne base station may be selected as needed, and is not particularly limited herein.
It is understood that an onshore base station refers to a base station deployed along the coast of a mobile communication network, and may cover offshore; the aerial base station is a base station borne by the unmanned aerial vehicle and can cover a broadband coverage blind area of a satellite network and a mobile communication network; the shipborne base station refers to a base station deployed on a target ship and can cover an area in a certain range around the target ship; satellites can then achieve full sea coverage.
First, step S1 is executed to acquire motion information of a target ship at a current time, motion information of a ship-borne user terminal of the target ship, and position information of an air base station at a time previous to the current time. The current time is the time when the base station for communication of the on-board user terminal of the target ship needs to be determined, the target ship is the carrier of the on-board user, and the on-board user terminal is the terminal equipment held by the on-board user.
The target vessel may carry one or more on-board subscribers or may be deployed with one or more on-board base stations, and the on-board subscriber terminals on the target vessel may also include one or more, i.e. each on-board subscriber may hold one or more terminal devices. In the embodiment of the present invention, the specific number of the shipborne user terminals and the shipborne base stations may be set according to needs, which is not particularly limited herein.
The motion information of the target ship at the current moment may include position information, motion speed, motion direction, etc. of the target ship at the current moment, and the motion information of the on-board user terminal at the current moment may include position information, motion speed, motion direction, etc. of the on-board user terminal at the current moment.
It can be understood that, because the on-board user terminal is carried on the on-board user, the position information, the movement speed and the movement direction of the on-board user are the position information, the movement speed and the movement direction of the on-board user terminal.
The motion information of the target ship at the current moment can be determined through the positioning information of the target ship, and the motion information of the on-board user terminal at the current moment can be determined through the positioning information of the on-board user terminal.
Because the aerial base station is mounted on the unmanned aerial vehicle, the position information of the aerial base station at the moment before the current moment is the position information of the unmanned aerial vehicle at the moment before, and can be determined by positioning the unmanned aerial vehicle at the moment before.
And then executing step S2, introducing a communication optimization model for maximizing the total achievable rate, and inputting the motion information of the target ship at the current moment, the motion information of the ship-borne user terminal at the current moment and the position information of the air base station at the previous moment, which are obtained in step S1, into the communication optimization model.
The communication optimization model is an optimization model taking the sum of communication rates of all shipborne user terminals on a target ship as an optimization target, and the model can be constructed based on the rate of a wireless return path in an offshore communication system after each shipborne user terminal is selectively accessed into an air base station or a shipborne base station.
For example, the above communication optimization model may be expressed as:
where N is the number of on-board user terminals, N may be 10.a, a s,n,t A, representing base station recommended parameters of the s-th shipborne base station facing the n-th shipborne user terminal at the current moment t s,n,t =1 indicates that the current time tth on-board base station serves the nth on-board user terminal, a s,n,t =0 means that the current time tth on-board base station will not serve the nth on-board user terminal. a, a u,n,t A represents a base station recommendation parameter, a, of a ith air base station facing an nth shipborne user terminal at a current moment t u,n,t =1 denotes the current time t, the u-th air base station serving the nth on-board user terminal, a u,n,t =0 means that the mth air base station will not serve the nth on-board user terminal at the current time t. Sigma (sigma) 2 Is the noise power.
P s,t And P u,t Respectively representing the transmission power of the s-th ship-borne base station and the u-th air base station at the current moment t. G s 、G u And G n The antenna gains of the s-th on-board base station, the u-th air base station and the n-th on-board user terminal are shown, respectively. In the embodiment of the invention, the shipborne base station, the aerial base station and the shipborne user terminal are considered to be provided with single antennas.
l s,n,t Representing the path loss between the s-th shipborne base station and the n-th shipborne user terminal equipment at the current moment, l u,n,t Indicating the path loss between the u-th air base station and the n-th on-board user terminal equipment at the current time t. Wherein l s,n,t A path loss model using free space, l u,n,t A two-diameter model is used. l (L) s,n,t L u,n,t Are functions of the location information.
When the communication optimization model is solved, the known quantity to be input is the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment, which are obtained in the step S1. The constraint conditions comprise rate constraint of the air base station on the access side in the offshore communication system, rate constraint of the ship-borne base station on the access side in the offshore communication system and rate requirement constraint of the ship-borne user terminal. In addition, the constraint may include the number of base stations that each on-board user terminal is capable of receiving to provide communication services.
The return path of the air base station in the offshore communication system refers to a communication loop formed by the assistance of other base stations in the offshore communication system after the shipborne user terminal is directly connected with the air base station. The return-side path of the shipborne base station in the offshore communication system refers to a communication loop formed by assistance of other base stations in the offshore communication system after the shipborne user terminal is directly connected with the shipborne base station. The rate constraint of the air base station on the access side by the backhaul side in the offshore communication system and the rate constraint of the ship-borne base station on the access side by the backhaul side in the offshore communication system can be set, and a rate threshold can be introduced and can be set as required, and the method is not particularly limited herein.
The rate requirement constraint of the on-board user terminal refers to the limitation of the communication rate required by the on-board user terminal, namely, a recommended base station provided for the on-board user terminal needs to ensure that the communication rate of the on-board user terminal is not lower than the minimum communication rate required by the on-board user terminal.
When the communication optimization model is solved, the communication optimization model can be realized by adopting an iterative algorithm, and the final solving result can comprise the recommended base stations of the shipborne user terminals with the maximum total achievable rate at the current moment, namely the recommended base stations corresponding to the shipborne user terminals under the condition that the maximum total achievable rate is met at the current moment. The recommended base station types may include an air base station or an on-board base station.
And finally, executing step S3, and transmitting the base station information of the recommended base station to the shipborne user terminals, namely, respectively transmitting the base station information of the recommended base station corresponding to each shipborne user terminal to the corresponding shipborne user terminal. The base station information may include information such as an identity (Identity document, ID) of the recommended base station, a communication configuration, and the like. After receiving the base station information, the shipborne user terminal can access the recommended base station through the base station information and communicate with other equipment through the recommended base station, such as making a call, voice, video, sending a short message, a file and the like.
When the configuration subject of the execution subject is different from the recommended base station, the target information may also be transmitted to the recommended base station so that the recommended base station knows the on-board user terminal to be accessed and the transmission power of the recommended base station required to serve the on-board user terminal to be accessed. The target information may include information such as a terminal ID of the on-board user terminal, a transmission power of the recommended base station, and the like.
According to the shipborne user communication method provided by the embodiment of the invention, firstly, the motion information of a target ship at the current moment, the motion information of a shipborne user terminal of the target ship and the position information of an air base station at the previous moment are obtained, a communication optimization model for maximizing the total reachable rate is introduced, the motion information of the target ship at the current moment, the motion information of the shipborne user terminal and the position information of the air base station at the previous moment are input into the communication optimization model, and are solved based on rate constraint, so that a recommended base station of the shipborne user terminal with the maximum total reachable rate is obtained at the current moment; the recommended base station comprises an air base station or a ship-borne base station; and finally, sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate based on the recommended base station. According to the method, the recommended base station serving the shipborne user terminal can be determined by solving the communication optimization model for maximizing the total achievable rate, so that the maximum total achievable rate of all shipborne user terminals on the target ship is ensured, the communication rate of each shipborne user terminal on the target ship can be improved, and the broadband user experience of each shipborne user terminal is improved.
On the basis of the above embodiment, the method for on-board user communication provided in the embodiment of the present invention solves the communication optimization model based on the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the on-board base station on the access side in the offshore communication system, and the rate requirement constraint of the on-board user terminal, to obtain the recommended base station serving the on-board user terminal with the maximum total achievable rate at the current moment, and includes:
determining a transmit power constraint of the on-board base station and a transmit power constraint of the air base station;
determining the position information constraint of the aerial base station, and solving the communication optimization model based on the transmitting power constraint of the shipborne base station, the transmitting power constraint of the aerial base station, the position information constraint, the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the shipborne base station on the access side in the backhaul side in the offshore communication system and the rate requirement constraint to obtain the recommended base station, the position information of the aerial base station at the current moment, the transmitting power of the shipborne base station and the transmitting power of the aerial base station.
Specifically, in the embodiment of the invention, when the communication optimization model is solved, the transmission power constraint of the shipborne base station and the transmission power constraint of the air base station can be introduced. The transmission power constraint of the shipborne base station may be that the transmission power of the shipborne base station is less than or equal to a power threshold of the shipborne base station, and the transmission power constraint of the aerial base station may be that the transmission power of the aerial base station is less than or equal to a power threshold of the aerial base station. The method comprises the following steps:
C1:0≤P s,t ≤P s,max
C2:0≤P u,t ≤P u,max
wherein C1 represents the transmission power constraint of the shipborne base station, C2 represents the transmission power constraint of the air base station, and P s,max Is the power threshold value of the shipborne base station, P u,max Is the power threshold of the air base station.
The constraint of the position information of the air base station can be represented by the distance between the current time and the previous time of the u-th air base station, namely:
C3:||c u,t -c u,t-1 ||≤d max
wherein C3 isPosition information constraint, c u,t Representing the position information of the (u) th air base station at the current moment, c u,t-1 Position information of the u-th air base station of the previous time t-1 representing the current time, |c u,t -c u,t-1 The I represents the distance between the current time t and the previous time t-1 of the u-th air base station, and d max Representing a distance threshold.
On the basis, the communication optimization model is subjected to iterative solution by combining the rate constraint of the backhaul side to the access side in the offshore communication system, the rate constraint of the shipborne base station to the access side in the offshore communication system and the rate requirement constraint of the backhaul side, so that not only the recommended base station but also the position information of the ith air base station, the transmission power of the ith shipborne base station and the transmission power of the ith air base station at the current moment t can be obtained.
In the embodiment of the invention, the information obtained by solving can be more comprehensive, the obtained recommended base station is more accurate, and the solving efficiency can be improved by introducing the transmitting power constraint of the shipborne base station, the transmitting power constraint of the air base station and the position information constraint.
On the basis of the above embodiment, in the on-board user communication method provided by the embodiment of the present invention, the motion information of the target ship at the current time is predicted based on the motion information of the target ship at the historical time, and the motion information of the on-board user terminal at the current time is predicted based on the motion information of the on-board user terminal at the historical time;
wherein the historical time is a time before the current time.
Specifically, in the embodiment of the invention, the motion information of the target ship at the current moment can be obtained through the motion information of the target ship at the historical moment by adopting a conventional prediction algorithm. The motion information of the shipborne user terminal of the target ship at the current moment can also be obtained through the motion information of the target ship at the historical moment by adopting a conventional prediction algorithm.
It is to be understood that the historical time is a time before the current time, and may be a plurality of historical times corresponding to the current time in different periods before the current time, or may be a plurality of historical times similar to the current time in time.
In the embodiment of the invention, the motion information of the target ship at the current moment and the motion information of the ship-borne user terminal at the current moment are obtained through prediction, so that the obtained information is more accurate, and the instantaneity of information acquisition can be ensured.
On the basis of the above embodiment, in the on-board user communication method provided by the embodiment of the present invention, a backhaul path of the air base station in the offshore communication system includes a wireless backhaul path provided by an onshore base station in the offshore communication system for the air base station or a wireless backhaul path provided by a satellite in the offshore communication system for the air base station;
the return side path of the shipborne base station in the offshore communication system comprises a wireless return path provided by the onshore base station for the shipborne base station or a wireless return path provided by the satellite for the shipborne base station.
Specifically, in the embodiment of the present invention, the backhaul path of the air base station in the offshore communication system may include a wireless backhaul path provided by an onshore base station in the offshore communication system for the air base station, or include a wireless backhaul path provided by a satellite in the offshore communication system for the air base station.
Taking the example that the path of the backhaul side of the air base station in the offshore communication system is a wireless backhaul path provided by the shore base station in the offshore communication system for the air base station, the rate constraint of the backhaul side to the access side of the air base station in the offshore communication system can be expressed as:
wherein C4 represents the rate constraint of the air base station on the back-pass side to the access side in the offshore communication system, P g,t The transmission power of the g-th onshore base station at the current time t is shown. G g Indicating the antenna gain of the g-th onshore base station. l (L) g,u,t Indicating whenPath loss between g-th on-shore base station and u-th air base station at previous moment t, l g,u,t Adopts a two-diameter model, l g,u,t As well as a function of the location information.
The path of the on-board base station on the return side in the offshore communication system may comprise a wireless return path provided by an onshore base station for the on-board base station or a wireless return path provided by a satellite for the on-board base station.
Taking the example that the return-side path of the shipborne base station in the offshore communication system is a wireless return-path provided by a satellite in the offshore communication system for the shipborne base station, the rate constraint of the return-side to the access-side of the shipborne base station in the offshore communication system can be expressed as:
C5:
wherein C5 represents the rate constraint of the ship-borne base station on the back-pass side to the access side in the offshore communication system, R 0 Representing a rate threshold.
Based on the foregoing embodiments, in the on-board user communication method provided in the embodiments of the present invention, the rate requirement constraint of the on-board user terminal may be expressed as:
C6:
wherein C6 represents the rate demand constraint of the on-board user terminal, R min Indicating the minimum communication rate required by the on-board user terminal.
On the basis of the above embodiment, in the on-board user communication method provided in the embodiment of the present invention, the target ship includes a plurality of on-board user terminals, and each on-board user terminal is provided with a communication service by a target base station;
the target base station is the on-board base station or the air base station.
Specifically, in the embodiment of the present invention, since each on-board user terminal is provided with a communication service by only one target base station, the target base station is an on-board base station or an air base station.
The above can be expressed as a base station number constraint, namely:
C7:a s,n,t ,a u,n,t ∈{0,1}
a s,n,t +a n,n,t ≤1
wherein C7 is a base station number constraint.
In summary, in the shipborne user communication method provided by the embodiment of the invention, the shipborne user terminal is taken as a communication service object, and the starry sky-land-sea collaborative coverage method for the shipborne user is provided, so that a recommended base station can be provided for the shipborne user terminal, the single return path rate constraint is broken, and the broadband communication experience of the shipborne user terminal is improved.
Fig. 2 is a diagram showing the effect of the communication method of the shipborne user according to the embodiment of the present invention. In fig. 2, ABS is the area where the air base station covers the target ship alone, and VBS is the area where the ship-borne base station covers the target ship alone. Abs+vbs means that in the embodiment of the present invention, an air base station and a ship-borne base station are adopted to cooperatively cover an area where a target ship is located.
Fig. 2 is plotted on the abscissa as the ABS transmit power (ABS transmit power (dBm)) and on the ordinate as the total achievable rate (Total achievable rate (bits/s/Hz)) for all on-board user terminals of the target vessel at the present moment. As can be seen from fig. 2, the broadband user experience of the on-board user terminal is improved by the cooperative coverage of the air base station and the on-board base station.
As shown in fig. 3, on the basis of the above embodiment, an on-board user communication device according to an embodiment of the present invention includes:
the information acquisition module 31 is configured to acquire motion information of a target ship at a current moment, motion information of a shipborne user terminal of the target ship, and position information of an air base station at a moment previous to the current moment;
the solving module 32 is configured to input the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment, and the position information of the air base station at the previous moment into a communication optimization model that maximizes a total achievable rate, and solve the communication optimization model based on a rate constraint of the air base station on an access side at a backhaul side in an offshore communication system, a rate constraint of the shipborne base station on the access side at the backhaul side in the offshore communication system, and a rate requirement constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station;
And the sending module 33 is configured to send the base station information of the recommended base station to the on-board user terminal, so that the on-board user terminal communicates with the recommended base station.
On the basis of the above embodiment, the on-board user communication device provided in the embodiment of the present invention is specifically configured to:
determining a transmit power constraint of the on-board base station and a transmit power constraint of the air base station;
determining the position information constraint of the aerial base station, and solving the communication optimization model based on the transmitting power constraint of the shipborne base station, the transmitting power constraint of the aerial base station, the position information constraint, the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the shipborne base station on the access side in the backhaul side in the offshore communication system and the rate requirement constraint to obtain the recommended base station, the position information of the aerial base station at the current moment, the transmitting power of the shipborne base station and the transmitting power of the aerial base station.
On the basis of the above embodiment, in the on-board user communication device provided by the embodiment of the present invention, the motion information of the target ship at the current time is predicted based on the motion information of the target ship at the historical time, and the motion information of the on-board user terminal at the current time is predicted based on the motion information of the on-board user terminal at the historical time;
Wherein the historical time is a time before the current time.
On the basis of the above embodiment, in the on-board user communication device provided in the embodiment of the present invention, a backhaul path of the air base station in the offshore communication system includes a wireless backhaul path provided by an onshore base station in the offshore communication system for the air base station or a wireless backhaul path provided by a satellite in the offshore communication system for the air base station;
the return side path of the shipborne base station in the offshore communication system comprises a wireless return path provided by the onshore base station for the shipborne base station or a wireless return path provided by the satellite for the shipborne base station.
On the basis of the above embodiments, the on-board user communication device provided in the embodiments of the present invention, where the target ship includes a plurality of on-board user terminals, and each on-board user terminal is provided with a communication service by a target base station;
the target base station is the on-board base station or the air base station.
Specifically, the functions of each module in the on-board user communication device provided in the embodiment of the present invention are in one-to-one correspondence with the operation flows of each step in the above method embodiment, and the achieved effects are identical.
As shown in fig. 4, on the basis of the above embodiment, an on-board user communication system according to an embodiment of the present invention includes: an offshore communication system comprising an onshore base station 41, an airborne base station 42, an onboard base station 43 and satellites 44;
one of the onshore base station, the aerial base station or the on-board base station is mounted with the on-board user communication device provided in the above embodiment. The on-board user communication device can be communicatively connected to other on-shore base stations 41, air base stations 42, on-board base stations 43, and on-board user terminals 45.
Fig. 5 illustrates a physical schematic diagram of an electronic device, as shown in fig. 5, which may include: processor (Processor) 510, communication interface (Communications Interface) 520, memory (Memory) 530, and communication bus 540, wherein Processor 510, communication interface 520, memory 530 complete communication with each other through communication bus 540. Processor 510 may invoke logic instructions in memory 530 to perform the on-board user communication method provided in the various embodiments described above, the method comprising: acquiring motion information of a target ship at the current moment, motion information of a shipborne user terminal of the target ship and position information of an air base station at the moment before the current moment; inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total achievable rate, and solving the communication optimization model based on the rate constraint of the air base station on an access side in an offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station; and sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station.
Further, the logic instructions in the memory 530 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product comprising a computer program storable on a non-transitory computer readable storage medium, the computer program when executed by a processor being capable of performing the method of on-board user communication provided by the methods described above, the method comprising: acquiring motion information of a target ship at the current moment, motion information of a shipborne user terminal of the target ship and position information of an air base station at the moment before the current moment; inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total achievable rate, and solving the communication optimization model based on the rate constraint of the air base station on an access side in an offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station; and sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which when executed by a processor is implemented to perform the method of on-board user communication provided by the above methods, the method comprising: acquiring motion information of a target ship at the current moment, motion information of a shipborne user terminal of the target ship and position information of an air base station at the moment before the current moment; inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total achievable rate, and solving the communication optimization model based on the rate constraint of the air base station on an access side in an offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station; and sending the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. An on-board user communication method, comprising:
acquiring motion information of a target ship at the current moment, motion information of a shipborne user terminal of the target ship and position information of an air base station at the moment before the current moment;
inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total achievable rate, and solving the communication optimization model based on the rate constraint of the air base station on an access side in an offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total achievable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station;
Transmitting the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal communicates through the recommended base station;
the communication optimization model is expressed as:
wherein N is the number of on-board user terminals, a s,n,t A, representing base station recommended parameters of the s-th shipborne base station facing the n-th shipborne user terminal at the current moment t s,n,t =1 indicates that the current time tth on-board base station serves the nth on-board user terminal, a s,n,t =0 means that the current time tth on-board base station will not serve the nth on-board user terminal, a u,n,t A represents a base station recommendation parameter, a, of a ith air base station facing an nth shipborne user terminal at a current moment t u,n,t =1 denotes the current time t, the u-th air base station serving the nth on-board user terminal, a u,n,t =0 means that the mth air base station will not serve the nth on-board user terminal at the current time t, σ 2 Is the noise power;
P s,t and P u,t Respectively representing the transmission power of the s-th ship-borne base station and the u-th air base station at the current moment, G s 、G u And G n Respectively representing the antenna gains of the s-th ship-borne base station, the u-th air base station and the n-th ship-borne user terminal;
l s,n,t representing the path loss between the s-th shipborne base station and the n-th shipborne user terminal equipment at the current moment, l u,n,t Representing the path loss between the ith air base station and the nth shipborne user terminal equipment at the current moment t;
the path of the air base station on the back-pass side in the offshore communication system refers to a communication loop formed by assistance of other base stations in the offshore communication system after the shipborne user terminal is directly connected with the air base station, and the path of the shipborne base station on the back-pass side in the offshore communication system refers to a communication loop formed by assistance of other base stations in the offshore communication system after the shipborne user terminal is directly connected with the shipborne base station.
2. The method according to claim 1, wherein the solving the communication optimization model based on the rate constraint of the air base station on the backhaul side to the access side in the offshore communication system, the rate constraint of the ship base station on the backhaul side to the access side in the offshore communication system, and the rate requirement constraint of the ship user terminal, to obtain the recommended base station serving the ship user terminal with the maximum total achievable rate at the current moment, includes:
determining a transmit power constraint of the on-board base station and a transmit power constraint of the air base station;
Determining the position information constraint of the aerial base station, and solving the communication optimization model based on the transmitting power constraint of the shipborne base station, the transmitting power constraint of the aerial base station, the position information constraint, the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the shipborne base station on the access side in the backhaul side in the offshore communication system and the rate requirement constraint to obtain the recommended base station, the position information of the aerial base station at the current moment, the transmitting power of the shipborne base station and the transmitting power of the aerial base station.
3. The on-board user communication method according to claim 1, wherein the motion information of the target ship at the current time is predicted based on the motion information of the target ship at a history time, and the motion information of the on-board user terminal at the current time is predicted based on the motion information of the on-board user terminal at the history time;
wherein the historical time is a time before the current time.
4. The marine vessel user communication method of claim 1, wherein the backhaul side path of the aerial base station in the offshore communication system comprises a wireless backhaul path provided by an onshore base station in the offshore communication system for the aerial base station or a wireless backhaul path provided by a satellite in the offshore communication system for the aerial base station;
The return side path of the shipborne base station in the offshore communication system comprises a wireless return path provided by the onshore base station for the shipborne base station or a wireless return path provided by the satellite for the shipborne base station.
5. The ship user communication method according to any one of claims 1 to 4, wherein the target ship comprises a plurality of on-board user terminals, and each on-board user terminal is provided with a communication service by one target base station;
the target base station is the on-board base station or the air base station.
6. An on-board subscriber communication device, comprising:
the information acquisition module is used for acquiring the motion information of a target ship at the current moment, the motion information of a shipborne user terminal of the target ship and the position information of an air base station at the moment before the current moment;
the solving module is used for inputting the motion information of the target ship at the current moment, the motion information of the shipborne user terminal at the current moment and the position information of the air base station at the previous moment into a communication optimization model for maximizing the total reachable rate, and solving the communication optimization model based on the rate constraint of the air base station on the access side in the offshore communication system, the rate constraint of the shipborne base station on the access side in the offshore communication system and the rate demand constraint of the shipborne user terminal, so as to obtain a recommended base station serving the shipborne user terminal with the maximum total reachable rate at the current moment; the recommended base station comprises the air base station or a ship-borne base station;
The transmitting module is used for transmitting the base station information of the recommended base station to the shipborne user terminal so that the shipborne user terminal can communicate through the recommended base station;
the communication optimization model is expressed as:
wherein N is the number of on-board user terminals, a s,n,t A, representing base station recommended parameters of the s-th shipborne base station facing the n-th shipborne user terminal at the current moment t s,n,t =1 indicates that the current time tth on-board base station serves the nth on-board user terminal, a s,n,t =0 means that the current time tth on-board base station will not serve the nth on-board user terminal, a u,n,t Indicating the current time t-oriented nthBase station recommendation parameter, a, of the u-th air base station of shipborne user terminal u,n,t =1 denotes the current time t, the u-th air base station serving the nth on-board user terminal, a u,n,t =0 means that the mth air base station will not serve the nth on-board user terminal at the current time t, σ 2 Is the noise power;
P s,t and P u,t Respectively representing the transmission power of the s-th ship-borne base station and the u-th air base station at the current moment, G s 、G u And G n Respectively representing the antenna gains of the s-th ship-borne base station, the u-th air base station and the n-th ship-borne user terminal;
l s,n,t representing the path loss between the s-th shipborne base station and the n-th shipborne user terminal equipment at the current moment, l u,n,t Representing the path loss between the ith air base station and the nth shipborne user terminal equipment at the current moment t;
the path of the air base station on the back-pass side in the offshore communication system refers to a communication loop formed by assistance of other base stations in the offshore communication system after the shipborne user terminal is directly connected with the air base station, and the path of the shipborne base station on the back-pass side in the offshore communication system refers to a communication loop formed by assistance of other base stations in the offshore communication system after the shipborne user terminal is directly connected with the shipborne base station.
7. An on-board subscriber communication system, comprising: an offshore communication system comprising an onshore base station, an airborne base station, an onboard base station, and a satellite;
one of the onshore base station, the aerial base station or the shipboard base station is equipped with the shipboard user communication device according to claim 6;
the on-board user communication device is in communication connection with the other on-shore base station, the air base station, the on-board base station and the on-board user terminal.
8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the method of on-board user communication of any one of claims 1 to 5 when the program is executed.
9. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the on-board user communication method according to any of claims 1 to 5.
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