CN109121148B - Communication networking method based on spherical digital phased array system - Google Patents

Abstract

The invention discloses a communication networking method based on a spherical digital phased array system. The method first introduces a phased array system, distinguishes beams of the same frequency band in space, and carries a phased array antenna through a mobile base station to establish communication with satellites link, establish communication with all users within the communicable range at the same time, and improve the spatial reuse of spectrum resources; secondly, based on the original selection of base stations for networking based on distance, it is proposed to consider both distance and angle factors when networking at the same time. Analyze the gain relationship between the angles of adjacent links, reduce co-channel interference between beams as much as possible, and improve the overall network traffic. The communication networking method proposed by the present invention is widely used, and fully utilizes resources to improve network performance, and the method is of great significance to the future development of mobile communication.

Description

A Communication Networking Method Based on Spherical Digital Phased Array System

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 technique

With the increasing number of daily activities and the rapid development of various industries, the demand for high-quality communication services is also increasing. However, at this stage, mobile users can only communicate through fixed base stations or mobile base stations in addition to communicating directly with satellites. The base station forms an area network through the omnidirectional antenna, and communicates with the mobile nodes within the communicable range. In order to ensure that the communication of each node in the area does not interfere with each other, the frequency band allocated to the network needs to be divided into spectrum, so as to maintain the center frequency of all nodes in the network. different. Due to the limited synchronous orbit resources and the scarcity of available resources for users, the communication is still dominated by voice. With the development of technology, the integrated phased array technology with multi-beam forming technology as the core will drive the development and wide application of mobile communication with its high integration and low cost. Phased array antennas can form directional beams and can distinguish signals in the same frequency band in different directions. Therefore, the introduction of phased array antennas into networks that originally used omnidirectional antennas can greatly improve spectrum resources. space reuse. However, if each link uses the same frequency band in the communication network centered on the base station node where the phased array antenna is introduced, there will be great co-channel interference. Changing the location of the base station can effectively alleviate the co-channel interference between multi-beams, but it is obviously not applicable in the mobile variable network. How to propose a better networking method based on the conventional network construction method based on the existing technology is a problem.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention proposes 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, characterized in that the method comprises the following steps:

S1: Build a communication network;

The communication network includes satellites, multiple mobile base stations, and all users within the communication range of the multiple mobile base stations. The multiple mobile base stations are equipped with phased array antennas, which establish communication links with the satellites and communicate with the satellites. All user nodes in the network establish communication to form multiple mobile communication networks with spherical digital phased array system as the core, and all beam frequency bands emitted by the digital phased array system are the same;

S2: optimize the mobile communication link;

(1) When all users are only within the coverage of one base station, then all users communicate with the mobile base station with which they can communicate;

(2) When there is a user located within the coverage of several mobile base stations, the communication network is optimized by considering the two factors of distance and the angle between beams. The specific implementation is as follows:

① First, network according to the principle of proximity. All users first communicate with the nearest communicable mobile base station. The user node is used as the transmitter and the mobile base station is used as the receiver. Calculate the signal-to-interference ratio SIR _ij received by the mobile base station, and calculate At this time, the overall network circulation C:

Among them, p _j represents the signal power received from user j by mobile base station i, I _k represents the co-channel interference strength of the kth link that the communication link established between user j and mobile base station i receives, and B represents the received signal bandwidth;

②Consider the angle networking. For users with only one communicable mobile base station to communicate with their communicable mobile base stations, for users within the coverage of N base stations, first connect them to the nearest communicable mobile base station to form communication link, and define the smaller angle between the user's communication link and the two adjacent communication links as θ ₁ , and then use the same method to sequentially connect the user a to In addition, the communicable mobile base stations are connected, and when the user is connected to different base stations, the smaller included angles between the communication link of user a and the adjacent communication link are θ ₂ , θ ₃ ··· θ _N , respectively, And compare the antenna gain values G(θ ₁ ), G(θ ₂ ), G(θ ₃ ), . . . , G(θ _N ) corresponding to multiple angles, the user can communicate with the smallest antenna gain value In mobile base station communication, the user node is used as the transmitter and the mobile base station is used as the receiver, the signal-to-interference ratio SIR' _ij received by the base station is calculated, and the overall network traffic C' is calculated at this time.

Wherein, p _j ' represents the signal power received from the j-th user by the i mobile base station i, and I _k ' represents the co-frequency interference intensity of the k-th link received by the communication link;

③Compare the overall network traffic obtained according to the two base station selection criteria. If C>C', only the distance is considered, and the users in the communication overlap coverage area select the base station to communicate according to the nearest base station; if C<C', then the communication overlaps Users in the coverage area select base stations according to the principle of the smaller the angle gain between the links, and users in other non-overlapping areas communicate with base stations within the communicable range.

Further, the phased array antenna is formed by a plurality of array elements to form a beam, and a graph of the change of the gain of the beam with the angle is obtained through actual measurement or CST simulation.

Beneficial effects of the present invention:

The networking method of the present invention firstly uses a spherical digital phased array system to spatially distinguish beams of the same frequency band to improve the spatial reuse of spectrum resources; The factors of distance and included angle are considered at the same time when the network is connected, and the overall network traffic is improved by analyzing the gain relationship between the included angles of adjacent links to reduce the co-channel interference between beams as much as possible.

Description of drawings

Fig. 1 is a schematic diagram of a communication networking model based on a spherical digital phased array system;

Figure 2 is a schematic diagram of a simple network model corresponding to two base station selection basis, a diagram is a schematic diagram of a network based on the principle of proximity, and a diagram is a schematic diagram of the network based on the principle of smaller gain.

Detailed ways

The present invention will be described in detail below according to the accompanying drawings and preferred embodiments, and the purpose and effects of the present invention will become clearer. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

A communication networking method based on a spherical digital phased array system, the method comprising the following steps:

S1: Build a communication network, as shown in Figure 1;

The communication network includes satellites, multiple mobile base stations, such as S1, S2, etc., and users within the communication range of multiple mobile base stations, such as a, b, c, etc. The multiple mobile base stations are equipped with phased array antennas. A communication link is established with the satellite, and communication is established with user nodes within its communication range to form a plurality of mobile communication networks with the spherical digital phased array system as the core. The communication range of the base station is limited, each circle is the communication range of the base station, and there is a coverage overlap area between the base station and the base station, which is represented by the shaded part in the figure. And in order to improve the spatial reuse of spectrum resources, all beams are located in the same frequency band;

S2: Optimize the mobile communication link:

(1) When all users are only within the coverage of one base station, then all users communicate with the mobile base station with which they can communicate;

(2) When there is a user located within the coverage of several mobile base stations, the communication network is optimized by considering the two factors of distance and the angle between beams. The specific implementation is as follows:

① First, network according to the principle of proximity. All users first communicate with the nearest communicable mobile base station. The user node is used as the transmitter and the mobile base station is used as the receiver. Calculate the signal-to-interference ratio SIR _ij received by the mobile base station, and calculate At this time, the overall network circulation C:

Among them, p _j represents the signal power received from user j by mobile base station i, I _k represents the co-channel interference strength of the kth link that the communication link established between user j and mobile base station i receives, and B represents the received signal bandwidth;

②Consider the angle networking. For users with only one communicable mobile base station to communicate with their communicable mobile base stations, for users within the coverage of N base stations, first connect them to the nearest communicable mobile base station to form communication link, and define the smaller angle between the user's communication link and the two adjacent communication links as θ ₁ , and then use the same method to sequentially connect the user a to In addition, the communicable mobile base stations are connected, and when the user is connected to different base stations, the smaller included angles between the communication link of user a and the adjacent communication link are θ ₂ , θ ₃ ··· θ _N , respectively, And compare the antenna gain values G(θ ₁ ), G(θ ₂ ), G(θ ₃ ), . . . , G(θ _N ) corresponding to multiple angles, the user can communicate with the smallest antenna gain value In mobile base station communication, the user node is used as the transmitter and the mobile base station is used as the receiver, the signal-to-interference ratio SIR' _ij received by the base station is calculated, and the overall network traffic C' is calculated at this time.

Wherein, p _j ' represents the signal power received from the j-th user by the i mobile base station i, and I _k ' represents the co-frequency interference intensity of the k-th link received by the communication link;

③Compare the overall network traffic obtained according to the two base station selection criteria. If C>C', only the distance is considered, and the users in the communication overlap coverage area select the base station to communicate according to the nearest base station; if C<C', then the communication overlaps Users in the coverage area select base stations according to the principle of the smaller the angle gain between the links, and users in other non-overlapping areas communicate with base stations within the communicable range.

As shown in Figure 2, the selection of two base stations is based on the corresponding simple network model. User a is located in the coverage of two base stations S1 and S2 at the same time. At this time,

① First, network according to the principle of proximity. All users first communicate with the nearest communicable mobile base station. The user node is used as the transmitter and the mobile base station is used as the receiver. Calculate the signal-to-interference ratio SIR _ij received by the mobile base station, and calculate At this time, the overall circulation of the network is C;

并计算此时网络总体流通量

若G(θ_aib)<G(θ_aic)，则该用户与距离最近基站通信；计算基站接收到的信号干扰比SIR'_ij，并计算此时网络总体流通量C'。②Considering the angle networking, for a user with only one communicable mobile base station to communicate with its communicable mobile base station, for user a within the coverage of N base stations, first connect it to the nearest communicable mobile base station S1 , form a communication link, and set the smaller angle between the user's communication link and the adjacent communication link as θ _as1b , and then use the same method to sequentially connect the user a with the other The communicable mobile base station S2 is connected, and when the user is connected to different base stations, the smaller angle between the communication link of user a and the adjacent communication link is θ _as2c respectively, and the antenna gain corresponding to the two angles is compared. Values G(θ _as1b ), G(θ _as2c ), if G(θ _as1b )>G(θ _as2c ), then user a communicates with base station S2, using the user node as the transmitter and the mobile base station as the receiver, calculate the base station receive The resulting signal-to-interference ratio SIR' _ij ,

And calculate the overall network circulation at this time

If G(θ _aib )<G(θ _aic ), the user communicates with the nearest base station; calculate the signal-to-interference ratio SIR' _ij received by the base station, and calculate the overall network traffic C' at this time.

③Compare the overall network traffic obtained according to the two base station selection criteria. If C>C', only the distance is considered, and the users in the communication overlap coverage area select the base station to communicate according to the nearest base station; if C<C', then the communication overlaps Users in the coverage area select base stations according to the principle of the smaller the angle gain between the links, and users in other non-overlapping areas communicate with base stations within the communicable range.

Those of ordinary skill in the art can understand that the above are only preferred examples of the invention and are not intended to limit the invention. Although the invention has been described in detail with reference to the foregoing examples, those skilled in the art can still understand the Modifications are made to the technical solutions described in the foregoing examples, or equivalent replacements are made to some of the technical features. All modifications and equivalent replacements made within the spirit and principle of the invention shall be included within the protection 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 calculated_ijAnd calculating the network total traffic C:

where i denotes a mobile base station, j denotes a user, p_jIndicating the power of the signal received by mobile station I from user j, I_kRepresenting 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…θ_NAnd comparing the antenna gain values G (theta) corresponding to the plurality of included angles₁)，G(θ₂)，G(θ₃)，…，G(θ_N) 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 calculated_i'_jAnd calculating the network total flow C 'at the moment'

Wherein p is_j' means that I mobile stations I receive the signal power from the j users, I_k' 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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