CN109121148B - Communication networking method based on spherical digital phased array system - Google Patents
Communication networking method based on spherical digital phased array system Download PDFInfo
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Abstract
The invention discloses a communication networking method based on a spherical digital phased array system, which comprises the steps of firstly introducing the phased array system, distinguishing beams with the same frequency band from space, carrying a phased array antenna through a mobile base station, establishing a communication link with a satellite, establishing communication with all users in a communicable range, and improving the spatial multiplexing of frequency spectrum resources; secondly, distance and included angle factors are considered when the simultaneous networking is proposed on the basis of selecting a base station for networking according to the distance, the same frequency interference between wave beams is reduced as much as possible by analyzing the gain relation between the included angles of adjacent links, and the overall network traffic is improved. The communication networking method provided by the invention is very wide in application, fully utilizes resources, improves network performance, and has great significance for future mobile communication development.
Description
Technical Field
The invention relates to the field of mobile communication, in particular to a communication networking method based on a spherical digital phased array system.
Background
With the increasing daily activities, various industries are rapidly developing, and the demand for high quality of communication services is also increasing. At this stage, however, mobile users can only communicate via fixed or mobile base stations, in addition to communicating directly with the satellites. The base station forms a regional network through the omnidirectional antenna and communicates with the mobile nodes in a communicable range, and in order to ensure that the communication of each node in the region is not interfered with each other, the frequency band allocated to the network needs to be subjected to frequency spectrum division, and the central frequencies of all nodes in the network are kept different. Due to the limited resources of the synchronous track, the available resources of the user are scarce, and the communication is still mainly based on voice. With the development of technology, the integrated phased array technology with the multi-beam forming technology as the core will drive the development and wide application of mobile communication with its high integration and low cost. The phased array antenna can form a directional wave beam, and can distinguish signals in the same frequency band in different directions, so that the phased array antenna is introduced into a network using the omnidirectional antenna originally, and the spatial multiplexing of spectrum resources can be improved to a great extent. However, if each link uses the same frequency band in a communication network centered on a base station node into which a phased array antenna is introduced, there is a significant co-channel interference. Changing the location of the base station can effectively alleviate the co-channel interference among multiple beams, but obviously is not suitable for mobile variable networks. How to provide a better networking method on the basis of the prior art in the conventional network construction method is a problem.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a communication networking method based on a spherical digital phased array system, and the specific technical scheme is as follows:
a communication networking method based on a spherical digital phased array system is characterized by comprising the following steps:
s1: constructing a communication network;
the communication network comprises a satellite, a plurality of mobile base stations and all users in the communication range of the mobile base stations, wherein the mobile base stations are all provided with phased array antennas, establish communication links with the satellite and establish communication with all user nodes in the communication range of the satellite, so that a plurality of mobile communication networks taking a spherical digital phased array system as a core are formed, and all wave beams sent by the digital phased array system have the same frequency band;
s2: optimizing a mobile communication link;
(1) when all users are only in the coverage range of one base station, all users communicate with the mobile base stations which can communicate with the users;
(2) when a user is located in the coverage area of a plurality of mobile base stations, two factors of distance and included angle between wave beams are considered to optimize the communication network, and the specific implementation is as follows:
① pressing firstThe near principle networking is that all users firstly communicate with the nearest communicable mobile base station, the user node is used as a transmitting end, the mobile base station is used as a receiving end, and the signal-to-interference ratio SIR received by the mobile base station is calculatedijAnd calculating the network total traffic C:
wherein p isjIndicating the power of the signal received by mobile station I from user j, IkRepresenting the co-channel interference strength of the k link suffered by the communication link established by the user j and the mobile base station i, and B representing the bandwidth of the received signal;
② consider angle networking, for a user having only one communicable mobile base station to communicate with its communicable mobile base station, for a user in the coverage of N base stations, first connect it with the nearest communicable mobile base station to form a communication link, and define the smaller angle between the user's communication link and the adjacent two communication links as theta1Then, the same method is adopted to connect the user a with another communicable mobile base station in turn, and when the user is connected with different base stations, the smaller included angles between the communication link of the user a and the adjacent communication link are respectively calculated to be theta2、θ3···θNAnd comparing the antenna gain values G (theta) corresponding to the plurality of included angles1)，G(θ2)，G(θ3)，···，G(θN) The user communicates with a communicable mobile base station corresponding to the minimum antenna gain value, and calculates the signal-to-interference ratio SIR 'received by the base station with the user node as the transmitting end and the mobile base station as the receiving end'ijAnd calculating the network total flow C 'at the moment'
Wherein p isj' means that I mobile stations I receive the signal power from the j users, Ik' indicates the co-channel interference strength of the communication link subjected to the k link;
comparing the total network traffic obtained according to the two base station selection bases, if C is larger than C', only considering the distance, and selecting the base station for communication according to the nearby user in the communication overlapping coverage area; and if C < C', selecting the base station by the user in the communication overlapping coverage area according to the principle that the smaller the gain of the included angle between the links, and communicating other users in the non-overlapping coverage area with the base station in the communicable range.
Furthermore, the phased array antenna forms a wave beam by a plurality of array elements, and the gain of the wave beam is obtained by actual measurement or CST simulation along with the angle change curve chart.
The invention has the beneficial effects that:
the networking method of the invention firstly utilizes a spherical digital phased array system to spatially distinguish the wave beams with the same frequency band, thereby improving the spatial multiplexing of frequency spectrum resources; secondly, distance and included angle factors are considered when the simultaneous networking is proposed on the basis of selecting a base station for networking according to the distance, and the same frequency interference between wave beams is reduced as much as possible by analyzing the gain relation between the included angles of adjacent links, so that the overall network traffic is improved.
Drawings
FIG. 1 is a schematic diagram of a communication networking model based on a spherical digital phased array system;
fig. 2 is a schematic diagram of two base station selection principles according to a corresponding simple network model, wherein a is a schematic diagram of a proximity principle networking, and b is a schematic diagram of a smaller gain principle networking.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and preferred embodiments, and the objects and effects of the present invention will become more apparent, and the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
A communication networking method based on a spherical digital phased array system comprises the following steps:
s1: constructing a communication network, as shown in fig. 1;
the communication network comprises a satellite, a plurality of mobile base stations such as S1, S2 and the like, and a plurality of users such as a, b, c and the like in the communication range of the mobile base stations, wherein the mobile base stations are all provided with phased array antennas, a communication link is established with the satellite, communication is established with user nodes in the communication range of the satellite, and a plurality of mobile communication networks taking a spherical digital phased array system as a core are formed. The communication range of the base station is limited, each circle is the communication range of the base station, and a coverage overlapping area exists between the base station and is indicated by a shaded part in the figure. In order to improve the spatial multiplexing of the frequency spectrum resources, all the wave beams are positioned in the same frequency band;
s2: optimizing the mobile communication link:
(1) when all users are only in the coverage range of one base station, all users communicate with the mobile base stations which can communicate with the users;
(2) when a user is located in the coverage area of a plurality of mobile base stations, two factors of distance and included angle between wave beams are considered to optimize the communication network, and the specific implementation is as follows:
① networking according to the principle of proximity, communicating with the nearest communicable mobile base station by all users, calculating the SIR received by the mobile base station with the user node as the transmitting end and the mobile base station as the receiving endijAnd calculating the network total traffic C:
wherein p isjIndicating the power of the signal received by mobile station I from user j, IkRepresenting the co-channel interference strength of the k link suffered by the communication link established by the user j and the mobile base station i, and B representing the bandwidth of the received signal;
② consider angle networking, for a user having only one communicable mobile base station to communicate with its communicable mobile base station, for a user in the coverage of N base stations, first connect it with the nearest communicable mobile base station to form a communication link, and define the smaller angle between the user's communication link and the adjacent two communication links as theta1Then, the same method is adopted to connect the user a with another communicable mobile base station in turn, and when the user is connected with different base stations, the smaller included angles between the communication link of the user a and the adjacent communication link are respectively calculated to be theta2、θ3···θNAnd comparing the antenna gain values G (theta) corresponding to the plurality of included angles1)，G(θ2)，G(θ3)，···，G(θN) The user communicates with a communicable mobile base station corresponding to the minimum antenna gain value, and calculates the signal-to-interference ratio SIR 'received by the base station with the user node as the transmitting end and the mobile base station as the receiving end'ijAnd calculating the network total flow C 'at the moment'
Wherein p isj' means that I mobile stations I receive the signal power from the j users, Ik' indicates the co-channel interference strength of the communication link subjected to the k link;
comparing the total network traffic obtained according to the two base station selection bases, if C is larger than C', only considering the distance, and selecting the base station for communication according to the nearby user in the communication overlapping coverage area; and if C < C', selecting the base station by the user in the communication overlapping coverage area according to the principle that the smaller the gain of the included angle between the links, and communicating other users in the non-overlapping coverage area with the base station in the communicable range.
As shown in fig. 2, user a is simultaneously located within the coverage of two bss S1, S2 according to the corresponding simple network model for the two bss selection,
① networking according to the principle of proximity, communicating with the nearest communicable mobile base station by all users, calculating the SIR received by the mobile base station with the user node as the transmitting end and the mobile base station as the receiving endijAnd calculating the network total traffic C at the moment;
② consider angle networking, for a user having only one communicable mobile base station communicating with its communicable mobile base station, for a user a in the coverage of N base stations, first connect it with the nearest communicable mobile base station S1 to form a communication link, and let the smaller of the angles between the user' S communication link and the adjacent communication link be θas1bThen, the same method is adopted to connect the user a with another communication mobile base station S2 in turn, and when the user connects with different base stations, the smaller included angles between the communication link of the user a and the adjacent communication link are respectively calculated to be thetaas2cComparing the gain G (theta) of the antenna corresponding to the two anglesas1b)，G(θas2c) If G (θ)as1b)>G(θas2c) Then user a communicates with base station S2, and calculates the signal to interference ratio SIR 'received by the base station with the user node as the transmitting end and the mobile base station as the receiving end'ij，
And calculates the network total traffic at that time
If G (theta)aib)<G(θaic) Then the user communicates with the nearest base station; calculating signal to interference ratio (SIR) received by base station'ijAnd calculates the network total traffic C' at this time.
Comparing the total network traffic obtained according to the two base station selection bases, if C is larger than C', only considering the distance, and selecting the base station for communication according to the nearby user in the communication overlapping coverage area; and if C < C', selecting the base station by the user in the communication overlapping coverage area according to the principle that the smaller the gain of the included angle between the links, and communicating other users in the non-overlapping coverage area with the base station in the communicable range.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and although the invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that various changes in the form and details of the embodiments may be made and equivalents may be substituted for elements thereof. All modifications, equivalents and the like which come within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (2)
1. A communication networking method based on a spherical digital phased array system is characterized by comprising the following steps:
s1: constructing a communication network;
the communication network comprises a satellite, a plurality of mobile base stations and all users in the communication range of the mobile base stations, wherein the mobile base stations are all provided with phased array antennas, establish communication links with the satellite and establish communication with all user nodes in the communication range of the satellite, so that a plurality of mobile communication networks taking a spherical digital phased array system as a core are formed, and all wave beams sent by the digital phased array system have the same frequency band;
s2: optimizing a mobile communication link;
(1) when all users are only in the coverage range of one base station, all users communicate with the mobile base stations which can communicate with the users;
(2) when a user is located in the coverage area of a plurality of mobile base stations, two factors of distance and included angle between wave beams are considered to optimize the communication network, and the specific implementation is as follows:
① networking according to the principle of proximity, allThe user communicates with the nearest communicable mobile base station, the user node is used as the transmitting end, the mobile base station is used as the receiving end, and the signal-to-interference ratio SIR received by the mobile base station is calculatedijAnd calculating the network total traffic C:
where i denotes a mobile base station, j denotes a user, pjIndicating the power of the signal received by mobile station I from user j, IkRepresenting the co-channel interference strength of a k link suffered by a communication link established by a user j and a mobile base station i, and B representing the bandwidth of a received signal;
② consider angle networking, for a user having only one communicable mobile base station to communicate with its communicable mobile base station, for a user in the coverage of N base stations, first connect it with the nearest communicable mobile base station to form a communication link, and define the smaller angle between the user's communication link and the adjacent two communication links as theta1Then, the same method is adopted to connect the user a with another communicable mobile base station in turn, and when the user is connected with different base stations, the smaller included angles between the communication link of the user a and the adjacent communication link are respectively calculated to be theta2、θ3…θNAnd comparing the antenna gain values G (theta) corresponding to the plurality of included angles1)，G(θ2)，G(θ3)，…，G(θN) The user communicates with the communicable mobile base station corresponding to the minimum antenna gain value, the user node is used as a transmitting end, the mobile base station is used as a receiving end, and the signal-to-interference ratio SIR received by the base station is calculatedi'jAnd calculating the network total flow C 'at the moment'
Wherein p isj' means that I mobile stations I receive the signal power from the j users, Ik' indicates the co-channel interference strength of the communication link subjected to the k link;
comparing the total network traffic obtained according to the two base station selection bases, if C is larger than C', only considering the distance, and selecting the base station for communication according to the nearby user in the communication overlapping coverage area; if C is less than C', the users in the communication overlapping coverage area select the base station according to the principle that the smaller the gain of the included angle between the links, and other users in the non-overlapping coverage area communicate with the base station in the communication range.
2. The communication networking method based on the spherical digital phased array system according to claim 1, wherein: the phased array antenna forms a wave beam by a plurality of array elements, and the gain of the wave beam is obtained by actual measurement or CST simulation along with an angle change curve chart.
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| CN102396163A (en) * | 2009-02-13 | 2012-03-28 | 索科波技术有限公司 | Communication system, apparatus and method for antenna array control |
| CN103491639A (en) * | 2013-10-15 | 2014-01-01 | 东北石油大学 | Multipoint coordinated user scheduling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102396163A (en) * | 2009-02-13 | 2012-03-28 | 索科波技术有限公司 | Communication system, apparatus and method for antenna array control |
| CN103491639A (en) * | 2013-10-15 | 2014-01-01 | 东北石油大学 | Multipoint coordinated user scheduling method |
Non-Patent Citations (1)
| Title |
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| "A Novel Networking Scheme for Mobile Communication Based on Phased Array Antenna";Li-hui XIA等：;《2018 2nd International Conference on Modeling, Simulation and Optimization Technologies and Applications(MSOTA 2018)》;20181231;第165页第2段-第169页第4段 * |
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