阅读说明：本技术 一种自组织方向性网络系统及其通信方法 (Self-organizing directional network system and communication method thereof ) 是由 田宇 庞轶环 王进 陈蔚涵 蒯震华 于 2021-11-03 设计创作，主要内容包括：本发明公开了一种自组织方向性网络系统及其通信方法,若干节点,各网络节点包括控制器、频率处理器以及天线装置；天线装置包括按照多维空间坐标系的正负方向分别安装布置的若干天线构件；控制器通过单发射通道控制发射信号经过频率处理器变频放大处理后,选择其中一个维度两个天线构件的发射馈源发射信号,通过双接收通道控制不同维度不同方向的两个天线构件接收馈源接收信号,变频处理后对接收信号分集处理,以使各节点满足发射圆极化、接收线极化设计,从而达到节点间极化损失受控的目的。本发明解决同频半双工工况下功放共用和收发天线隔离问题,通过收发极化设计控制组网终端间随机相对位置造成的极化损失。(The invention discloses a self-organizing directional network system and a communication method thereof, wherein each network node comprises a controller, a frequency processor and an antenna device; the antenna device comprises a plurality of antenna components which are respectively arranged in the positive and negative directions of a multi-dimensional space coordinate system; the controller controls the transmitting signal through the single transmitting channel, the transmitting feed source transmitting signal of one dimension of two antenna components is selected after the frequency conversion amplification processing of the frequency processor, the two antenna components with different dimensions and different directions are controlled through the double receiving channels, the receiving feed source receiving signal is received, and the receiving signal is subjected to diversity processing after the frequency conversion processing, so that each node meets the design of transmitting circular polarization and receiving linear polarization, and the purpose of controlling the polarization loss among the nodes is achieved. The invention solves the problems of power amplifier sharing and receiving and transmitting antenna isolation under the same-frequency half-duplex working condition, and controls the polarization loss caused by random relative positions between networking terminals through the receiving and transmitting polarization design.)

1. An ad-hoc directional network system, comprising: the nodes are communicated with each other, main nodes in the nodes are selected during the communication process, and other nodes are used as matched sub-nodes;

each of the nodes includes a controller, a frequency processor, and an antenna device; the antenna device comprises a plurality of antenna components which are respectively arranged in a positive direction and a negative direction of a multidimensional space coordinate system, and each antenna component comprises a transmitting feed source and a receiving feed source;

the controller is respectively connected with the frequency processor and the antenna device, the single transmitting channel is used for controlling transmitting signals to be subjected to frequency conversion amplification processing by the frequency processor, transmitting signals of transmitting feed sources of two antenna components with one dimension are selected, receiving signals of the two antenna components with different dimensions and different directions are received by the two receiving channels, and diversity processing is carried out on the received signals after frequency conversion processing, so that each node meets the design of transmitting circular polarization and receiving linear polarization, and the purpose of controlling polarization loss between the nodes is achieved.

2. The self-organizing directional network system of claim 1, wherein the antenna arrangement further comprises a transmit multiplexer matched to the number of dimensions, a number of power dividers; the frequency processor comprises a power amplifier;

the input end of the transmitting multi-way switch is connected with the power amplifier, the output end of the transmitting multi-way switch is respectively connected with each power divider, the controller is respectively electrically connected with the power amplifier and the transmitting multi-way switch, the power amplifier is controlled to amplify a transmitting signal, and the transmitting multi-way switch is controlled to be connected with a transmitting feed source of two antenna components with one dimension, so that the multi-antenna components share the power amplifier.

3. The self-organizing directional network system of claim 2, wherein the frequency processor further comprises a phase-locked source, a first mixer, and a second mixer, the phase-locked source being connected to the first mixer, the second mixer, and the controller, respectively;

the controller controls the switching of the signal receiving or output branch through the phase-locked source to realize that the transmitting frequency of the transmitting signal is controlled by the first frequency mixer in a single channel, the receiving frequency of the receiving signal is controlled by the second frequency mixer in a double channel, and the same frequency is adopted for signal transceiving.

4. The ad-hoc directional network system of claim 2, wherein said antenna means further comprises a positive receive multiplexer and a negative receive multiplexer matched to the number of dimensions; the controller is respectively electrically connected with the positive receiving multi-way switch and the negative receiving multi-way switch, controls the positive receiving multi-way switch to be connected with a receiving feed source of the positive direction antenna component with one dimension, and transmits a receiving signal to one channel of the second mixer; and controlling the negative receiving multi-way switch to be connected with a receiving feed source of the negative direction antenna component with the other dimension, transmitting a received signal to the other channel of the second mixer, and enabling the two received signals to respectively enter the independent receiving channels, thereby realizing diversity reception and avoiding noise coefficient loss caused by combining the received signals.

5. The ad-hoc directional network system of claim 1, wherein said antenna means employs a shaped antenna for transmitting and receiving narrow beams.

6. The self-organizing directional network system of claim 1, wherein the antenna device employs antenna elements arranged in three dimensions, six directions, with the antenna elements being disposed in positive and negative directions of three mutually perpendicular dimensions, respectively.

7. An ad-hoc directional network communication method, characterized in that the ad-hoc directional network system of any one of claims 1 to 6 is used; the method comprises the following steps:

receiving network transceiving control information of each access node in a time slot period in a network monitoring stage, confirming a main node and a sub-node in the access node according to a preset antenna switching strategy, and acquiring relative position information of the sub-node and the main node;

controlling each node to continuously communicate the position information of the accessed main node and the position information of the sub-nodes according to the antenna switching strategy according to a preset network access time interval so as to control the nodes to select and switch antenna components for receiving and transmitting signals according to the attitude directivity and provide prior data for the communication resource allocation of the network access nodes;

the method comprises the steps of obtaining the signal receiving and transmitting states of all antenna components of a current time slot section network access node, and controlling the receiving and transmitting states of all antenna components of the next time slot section of the network access node by utilizing a TDMA network protocol so as to realize that the antenna components meet the design of transmitting circular polarization and receiving linear polarization and achieve the purpose of controlling the polarization loss among the nodes.

8. The method of self-organizing directional network communication of claim 7, wherein the antenna switching strategy comprises:

setting the number N of time slot segments of the time slot period according to the number N of dimensions of a space coordinate system; based on a network monitoring stage, the main node transmits a control signal, and the sub-nodes receive the control signal; the main node switches a transmitting antenna once in a time slot segment, and N directions of N dimensions are completed by traversing every N time slot segments; and the sub-node switches the receiving antenna once every N time slot segments, wherein at least one time slot segment can receive the network control signal sent by the main node, so as to obtain the relative position information with the main node.

9. The method of claim 7, further comprising allocating access slot segments by each said sub-node according to the relative position information with said master node and pre-established address information in advance to avoid signal collision when said sub-nodes access.

10. The method of self-organizing directional network communication of claim 7, further comprising using a half-duplex network protocol to allow each of said nodes to transceive signals in different dimensions, and using positional isolation between antenna structures in each of said nodes to allow adjacent time slot segments to transceive signals through different antennas.

Technical Field

The invention relates to the field of networking communication of spacecrafts, in particular to a self-organizing directional network system and a communication method thereof.

Background

In the application of inter-device communication, due to the antenna layout and the spatial attenuation characteristic of electromagnetic waves, a directional topology network is often adopted, that is, a plurality of directional antennas are adopted to perform directional transmission according to mutual positions, so as to achieve both directional coverage and transmission gain.

For example, in the S band and below, generally only 2 antennas are used to achieve substantially omni-directional communication. For example, for an application scenario in which the size of the device is limited, due to the influence of antenna size factors, a frequency band of C band and above is generally adopted, and generally, at least 6 directional antenna combinations are required to meet the requirement of omnidirectional communication.

Because the frequency band antenna has stronger directivity, if one power amplifier is adopted to radiate and receive through a plurality of antennas through the power dividing and combining network, the transmitting power consumption and the receiving noise coefficient of the frequency band antenna are greatly increased, and therefore, the corresponding direction needs to be selected for communication. The network is called a directional topological network because the network is built and maintained to have the directional topological characteristic.

Currently, a common directional networking device generally has two modes, one mode is to adopt a plurality of phased array antenna array surfaces, and realize directional communication according to communication requirements by controlling a transceiving mode and beam direction control of a transceiving component, but a complex phased array antenna needs to be designed, and although a directional narrow beam can be formed, higher power consumption and higher cost are needed in a wide beam coverage scene needing random access relative to a directional antenna;

one is to use multiple sets of directional antennas and power amplifiers to realize directional communication by controlling the switches of the power amplifiers and the receiving and transmitting modes of the receiver, but a plurality of power amplifiers are required to be equipped, and although the cost and the weight are reduced compared with the phased array, the plurality of power amplifiers do not need to work simultaneously, so that a larger optimization space exists in the design.

Disclosure of Invention

In order to reduce the cost and solve the technical problems in the background art, embodiments of the present application provide a self-organizing directional network system and a communication method thereof, so as to implement a multi-antenna hardware architecture based on a single power amplifier.

In a first aspect, the present application provides an ad-hoc directional network system, comprising: the nodes are communicated with each other, main nodes in the nodes are selected during the communication process, and other nodes are used as matched sub-nodes;

each of the nodes includes a controller, a frequency processor, and an antenna device; the antenna device comprises a plurality of antenna components which are respectively arranged in a positive direction and a negative direction of a multidimensional space coordinate system, and each antenna component comprises a transmitting feed source and a receiving feed source;

the controller is respectively connected with the frequency processor and the antenna device, the single transmitting channel is used for controlling transmitting signals to be subjected to frequency conversion amplification processing by the frequency processor, transmitting signals of transmitting feed sources of two antenna components with one dimension are selected, receiving signals of the two antenna components with different dimensions and different directions are received by the two receiving channels, and diversity processing is carried out on the received signals after frequency conversion processing, so that each node meets the design of transmitting circular polarization and receiving linear polarization, and the purpose of controlling polarization loss between the nodes is achieved.

Furthermore, the antenna device also comprises a transmitting multi-way switch matched with the dimension number and a plurality of power dividers; the frequency processor comprises a power amplifier;

the input end of the transmitting multi-way switch is connected with the power amplifier, the output end of the transmitting multi-way switch is respectively connected with each power divider, the controller is respectively electrically connected with the power amplifier and the transmitting multi-way switch, the power amplifier is controlled to amplify a transmitting signal, and the transmitting multi-way switch is controlled to be connected with a transmitting feed source of two antenna components with one dimension, so that the multi-antenna components share the power amplifier.

Further, the frequency processor further comprises a phase-locked source, a first mixer and a second mixer, wherein the phase-locked source is respectively connected with the first mixer, the second mixer and the controller;

the controller controls the switching of the signal receiving or output branch through the phase-locked source to realize that the transmitting frequency of the transmitting signal is controlled by the first frequency mixer in a single channel, the receiving frequency of the receiving signal is controlled by the second frequency mixer in a double channel, and the same frequency is adopted for signal transceiving.

Furthermore, the antenna device also comprises a positive receiving multi-way switch and a negative receiving multi-way switch which are matched with the number of the dimensions; the controller is respectively electrically connected with the positive receiving multi-way switch and the negative receiving multi-way switch, controls the positive receiving multi-way switch to be connected with a receiving feed source of the positive direction antenna component with one dimension, and transmits a receiving signal to one channel of the second mixer; and controlling the negative receiving multi-way switch to be connected with a receiving feed source of the negative direction antenna component with the other dimension, transmitting a received signal to the other channel of the second mixer, and enabling the two received signals to respectively enter the independent receiving channels, thereby realizing diversity reception and avoiding noise coefficient loss caused by combining the received signals.

Further, the antenna component adopts a shaped antenna for transmitting and receiving narrow beams.

Further, the antenna device adopts the antenna components arranged in three-dimensional six-direction, so that the antenna components are respectively arranged in the positive and negative directions of three mutually perpendicular dimensions.

In a second aspect, the present application provides a method for self-organizing directional network communication, which employs the self-organizing directional network system of any one of the first aspect; the method comprises the following steps:

receiving network transceiving control information of each access node in a time slot period in a network monitoring stage, confirming a main node and a sub-node in the access node according to a preset antenna switching strategy, and acquiring relative position information of the sub-node and the main node;

controlling each node to continuously communicate the position information of the accessed main node and the position information of the sub-nodes according to the antenna switching strategy according to a preset network access time interval so as to control the nodes to select and switch antenna components for receiving and transmitting signals according to the attitude directivity and provide prior data for the communication resource allocation of the network access nodes;

the method comprises the steps of obtaining the signal receiving and transmitting states of all antenna components of a current time slot section network access node, and controlling the receiving and transmitting states of all antenna components of the next time slot section of the network access node by utilizing a TDMA network protocol so as to realize that the antenna components meet the design of transmitting circular polarization and receiving linear polarization and achieve the purpose of controlling the polarization loss among the nodes.

Further, the antenna switching strategy includes:

setting the number N of time slot segments of the time slot period according to the number N of dimensions of a space coordinate system; based on a network monitoring stage, the main node transmits a control signal, and the sub-nodes receive the control signal; the main node switches a transmitting antenna once in a time slot segment, and N directions of N dimensions are completed by traversing every N time slot segments; and the sub-node switches the receiving antenna once every N time slot segments, wherein at least one time slot segment can receive the network control signal sent by the main node, so as to obtain the relative position information with the main node.

And further, each child node performs allocation of an access time slot segment in advance according to the relative position information of the child node and the main node, so as to avoid signal collision when the child node accesses.

The method further comprises the steps of enabling each node to transmit and receive signals in different dimensions by using a half-duplex network protocol, and enabling adjacent time slot segments to transmit and receive signals through different antennas by using position isolation among antenna components in each node.

The technical scheme provided in the embodiment of the application has at least the following technical effects:

1. the invention adopts a low-power-consumption hardware framework of a single power amplifier, a single-frequency integrated switch microwave network and a multi-dimensional antenna array, solves the problems of power amplifier sharing and receiving and transmitting antenna isolation under the same-frequency half-duplex working condition through protocol and time sequence control, and controls the polarization loss caused by random relative positions between networking terminals through receiving and transmitting polarization design, thereby meeting the requirements of realizing omnidirectional coverage, time division space division multiplexing and integrated hardware design by multi-beam splicing.

2, the invention only uses a set of frequency synthesis and a power amplifier to combine with the antenna array, thus realizing the omnidirectional coverage communication requirement of the time-division directional topology self-organizing network, optimizing the hardware design, solving the problem of receiving and transmitting interference, controlling the polarization loss and further improving the system performance through diversity reception.

And 3, as six groups of wide beam antenna arrays are preferably adopted to realize time-sharing omnidirectional coverage, the noise coefficient deterioration caused by combination is avoided through switch selection and diversity reception, and the self-interference of the receiving and transmitting of the same-frequency antenna is avoided through the space isolation design and the receiving and transmitting time sequence control of the antennas with different dimensions.

The polarization loss control among networking equipment is realized through the design of transmitting circular polarization/receiving linear polarization.

4, by reasonably designing a networking protocol, the power is transmitted in only one dimension of preset dimensions (such as three-dimensional X, Y, Z) when the signal is transmitted each time, so that a single power amplifier design is realized through a switch and a power division network, and the hardware complexity is greatly reduced.

5, as six directional antenna combinations in three-dimensional six directions and two-way diversity reception are preferably adopted, time-sharing omnidirectional coverage without noise coefficient loss is realized; by the design of an access protocol, signal spaces in six directions are divided into X, Y, Z three dimensions, and the signals are transmitted in two directions of one dimension each time the signals are transmitted, so that the access complexity is reduced, and the sharing of power amplifiers is realized by using a switch and a power division network; the reception is free to choose by protocol and network topology.

And 6, selecting the switch of the transmitting feed source and the direction of the receiving feed source in a pre-starting stage of the power amplifier through time sequence design and switch selection so as to solve the contradiction between power amplifier stability and receiving and transmitting interference.

Drawings

Fig. 1 is a schematic diagram of an ad-hoc directional network system according to a first embodiment of the present application;

fig. 2 is a block diagram of a node in the first embodiment of the present application;

fig. 3 is a block diagram of a node-forming control flow connection according to a first embodiment of the present application;

fig. 4 is a block diagram of a connection of a transmission signal stream formed by nodes in the first embodiment of the present application;

fig. 5 is a block diagram of a connection of a received signal stream formed by nodes according to a first embodiment of the present application;

fig. 6 is a connection block diagram of a three-dimensional six-way node composition transmission signal flow in the first embodiment of the present application;

fig. 7 is a connection block diagram of a received signal stream formed by three-dimensional six-way nodes in the first embodiment of the present application;

fig. 8 is a block diagram of an interface connection of a radio frequency module in a three-dimensional six-way node according to an embodiment of the present application;

fig. 9 is a flowchart of a method for ad hoc directional network communication according to a second embodiment of the present application.

Fig. 10 is a three-dimensional six-way node directional traversal access slot control in the second embodiment of the present application;

reference numerals:

node 100, master node 100-1, subnode 100-2, controller 110, antenna apparatus 120, frequency processor 130, antenna structure 121, transmit multiplexer 122, power divider 123, forward receive multiplexer 124, negative receive multiplexer 125, power amplifier 131, phase-locked source 132, first mixer 133, and second mixer 134.

Detailed Description

In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.

Example one

Referring to fig. 1-8, the present embodiment provides an ad-hoc directional network system, which includes a plurality of nodes 100, wherein the nodes 100 communicate with each other, and during the communication process, a master node 100-1 is selected from the nodes, and the other nodes serve as child nodes 100-2 matched with the master node.

Each node 100 in this embodiment includes a controller 110, a frequency processor 130, and an antenna device 120; the antenna device 120 includes a plurality of antenna members 121 respectively installed and arranged in the positive and negative directions of the multidimensional space coordinate system, and each antenna member 121 includes a transmitting feed and a receiving feed.

In one embodiment, to meet the design requirements of an omni-directional antenna, the antenna member 121 employs a shaped antenna for transmitting and receiving narrow beams. Preferably, the antenna device 120 employs the antenna members 121 arranged in three-dimensional six-directions, such that the antenna members 121 are respectively disposed in the positive and negative directions of three mutually perpendicular dimensions. That is, the antenna device 120 employs six antenna elements 121, and two positive and negative antenna elements 121 in three directions X, Y, Z of the three-dimensional space coordinate system.

The controller 110 in this embodiment is connected to the frequency processor 130 and the antenna device 120, and controls the transmission signal to be frequency-converted and amplified by the frequency processor 130 through a single transmission channel, and then selects the transmission feed transmission signal of two antenna members 121 with one dimension, controls two antenna members 121 with different dimensions and different directions to receive the feed reception signal through two reception channels, and performs diversity processing on the reception signal after frequency conversion processing, so that each node 100 satisfies the design of transmission circular polarization and reception linear polarization, and the purpose of controlling polarization loss between nodes 100 is achieved.

In this embodiment, the controller 110 selects the switch of the transmitting feed source and the switch of the receiving feed source in different directions at the pre-starting stage of the power amplifier 131 through time sequence design and switch selection, so as to solve the contradiction between power amplifier stability and transmit-receive interference, and realize the polarization loss control between the networking nodes 100 through the design of transmitting circular polarization and receiving linear polarization.

The antenna device 120 in this embodiment includes, in addition to the antenna member 121, a transmission multi-way switch 122 and a plurality of power dividers 123, which are matched with the number of dimensions; the frequency processor 130 includes a power amplifier 131; the input end of the transmission multi-way switch 122 is connected to the power amplifier 131, the output end of the transmission multi-way switch 122 is connected to each power divider 123, the controller 110 is electrically connected to the power amplifier 131 and the transmission multi-way switch 122, the power amplifier 131 is controlled to amplify a transmission signal, and the transmission multi-way switch 122 is controlled to be connected to the transmission feed sources of two antenna members 121 with one dimension, so that the multiple antenna members 121 share the power amplifier 131.

The antenna device 120 in this embodiment further includes a positive reception multiplexer 124 and a negative reception multiplexer 125 that are matched in number to the number of dimensions; the controller 110 is electrically connected to the positive receiving multi-way switch 124 and the negative receiving multi-way switch 125, respectively, controls the positive receiving multi-way switch 124 to be connected to the receiving feed of the positive antenna member 121 of one dimension, and transmits the receiving signal to one channel of the second mixer 134; the negative receiving multi-way switch 125 is controlled to be connected with the receiving feed source of the negative antenna member 121 of the other dimension, and the received signal is transmitted to the other channel of the second mixer 134, and the two received signals respectively enter the independent receiving channels, so that diversity reception is realized, and noise coefficient loss caused by the combined received signal is avoided.

Further, the antenna device 120 in this embodiment includes six three-dimensional six-way antenna members 121, and each antenna member 121 includes a transmitting feed and a receiving feed therein. In the embodiment, when the network signal is transmitted, the multi-channel transmission receiving and transmitting signal is adopted, and the multi-channel transmission receiving and transmitting signal comprises a transmitting channel and two receiving channels. Based on the three-dimensional six-direction six antenna members 121, it is preferable that each multi-way switch adopts a one-out-of-three switch, so that the one-out-of-three switch is connected with a receiving feed source or a transmitting feed source of the corresponding antenna member 121 during signal transceiving. In this embodiment, the transmitting channel is respectively connected X, Y, Z with the transmitting feed sources of the positive and negative antenna members 121 in three directions through a three-out-of-one switch; one of the two receiving channels is connected X, Y, Z through the one-out-of-three switch to the receiving feed of the positive antenna member 121 in three directions; the other receiving channel is connected X, Y, Z the receiving feed source of the negative antenna component 121 in three directions through a one-out-of-three switch, and the two paths of receiving signals enter the independent receiving channels respectively, thereby realizing diversity reception and avoiding noise coefficient loss caused by combining.

The frequency processor 130 in this embodiment further includes a phase-locked source 132, a first mixer 133, and a second mixer 134, where the phase-locked source 132 is connected to the first mixer 133, the second mixer 134, and the controller 110, respectively; the controller 110 controls the switching of the signal incoming or output branches by the phase-locked source 132 to achieve the control of the transmission frequency of the transmission signal in a single channel by the first mixer 133 and the control of the reception frequency of the reception signal in a dual channel by the second mixer 134, and the same frequency is used for signal transceiving. It can be seen that the frequency processors 130 in the present embodiment are respectively arranged and installed according to the transceiving channels. In the signal transmission of the transmitting channel, the controller 110 is electrically connected to the phase-locked source 132, the power amplifier 131 and the transmitting multi-way switch 122, respectively, to control the phase-locked source 132, the first mixer 133, the power amplifier 131 and the transmitting multi-way switch 122 through which the transmitting channel passes to start operation; in the signal transmission of the receiving channel, the controller 110 is electrically connected to the phase-locked source 132, the positive receiving multi-way switch 124, and the negative receiving multi-way switch 125, respectively, to control the positive receiving multi-way switch 124, the negative receiving multi-way switch 125, and the second mixer 134 through which the receiving channel passes to start up.

It can be seen that, in this embodiment, by reasonably designing a networking protocol, each time a signal is transmitted, power is transmitted only in one of multiple dimensions (for example, in one of three dimensions (X, Y, Z)), so that by using a multi-way switch design and a power division design, the signal is transmitted in two directions of one dimension during signal transmission, thereby reducing access complexity, realizing a common design of a single power amplifier 131, greatly reducing hardware complexity, and achieving the purpose of freely selecting a received and transmitted signal through a protocol and a network topology.

In this embodiment, for the self-organizing network architecture, the first mixer 133, the second mixer 134 and the phase-locked source 132 are adopted, and a frequency synthesizer is used to perform the frequency conversion process of the transmitting and receiving signals, so that the transmitting and receiving signals adopt the same frequency. In this embodiment, the three-dimensional six-directional antenna member 121 and the technology of single-channel transmitting dual-channel diversity reception signals are preferably adopted to implement time-sharing omni-directional coverage without noise factor loss.

Example two

Referring to fig. 9-10, an embodiment of the present application provides an ad hoc directional network communication method, which uses the ad hoc directional network system according to any one of the first aspect. The method comprises the following steps:

step S100: receiving network transceiving control information of each access node 100 in a time slot period in a network monitoring stage, confirming a main node 100-1 and a sub-node 100-2 in the access node 100 according to a preset antenna switching strategy, and acquiring relative position information of the sub-node 100-2 and the main node 100-1.

Wherein, the antenna switching strategy comprises:

setting the number N of time slot segments of a time slot period according to the number N of dimensions of a space coordinate system; based on the network monitoring stage, the main node transmits a control signal, and the sub-nodes receive the control signal; the main node switches the transmitting antenna once in a time slot segment, and N directions of N dimensions are completed by traversing every N time slot segments; the sub-nodes switch the receiving antenna once every N time slot segments, wherein at least one time slot segment can receive the network control signal sent by the main node, so as to obtain the relative position information with the main node.

Further, the preferred three-dimensional six-way design of the antenna element 121, with 3 × 3 slot cycles, meets the requirement of listening across random relative positions of the three-dimensional combination. Since the sub-node does not know the location information of the main node when accessing the network, in the broadcast listening period appointed by the protocol, the antenna members 121 of the main node and the sub-node are switched at intervals of three time slots according to the antenna switching strategy, and the antenna members 121 in multiple directions are used for scanning the transmitted and received signals. When the master node sends the network control message, the transmitting antenna element 121 is switched once in each time slot, every three time slots traverse X, Y, Z three directions, and total nine time slots, and the master node network control message is transmitted nine times in different directions, so that the network access node 100 switches the selection of the receiving antenna element 121 once every three time slots in the scanning process, and can receive the network control message at least once, thereby obtaining the relative position information with the master node.

Step S200: and controlling each node 100 to continuously communicate the position information of the accessed main node and the position information of the sub-nodes according to the antenna switching strategy according to the preset network access time interval, so as to control the antenna components 121 for switching the transmitting and receiving signals among the nodes 100 according to the attitude directivity and provide the prior data for the communication resource allocation of the network access node 100.

Step S200 further includes: and each child node performs allocation of access time slot segments according to the relative position information with the main node and address information in advance, so as to avoid signal collision when the child nodes are accessed.

Step S300: the signal transceiving state of each antenna component 121 of the current time slot segment access node 100 is acquired, and the transceiving state of each antenna component 121 of the next time slot segment of the access node 100 is controlled by using a TDMA network protocol, so that the antenna components 121 meet the design of transmitting circular polarization and receiving linear polarization, and the purpose of controlling polarization loss among the nodes 100 is achieved.

Further included after step S300 is: each node 100 transmits and receives signals in different dimensions using a half-duplex network protocol, and adjacent slot segments transmit and receive signals through different antennas using position isolation between the antenna elements 121 in each node 100.

To explain further, in the present embodiment, a design of six antenna elements 121 in three dimensions and six directions is preferably adopted, and therefore, the antenna elements 121 are respectively disposed in the positive and negative directions of three mutually perpendicular dimensions in each node 100. The space is represented by three dimensions, a coordinate system is established, the three dimensions are respectively an X axis, a Y axis and a Z axis, in the embodiment, the three dimensions are determined first, and then, positive and negative representations are respectively used for two directions of the three dimensions, so that each node 100 in the embodiment has six directional antenna components 121 in the space, and included angles among the antennas are the same, and the purpose of omnidirectional coverage is achieved. Each antenna member 121 includes a transmitting feed and a receiving feed; the node 100 includes one transmit channel and two receive channels; the transmitting channels are respectively connected with transmitting feed sources of the antenna components 121 in the three-dimensional positive and negative directions through the multi-way switches; one receiving channel is connected to the receiving feed source of the three-dimensional antenna member 121 in the forward direction through a multi-way switch; and the other receiving channel is respectively connected with a receiving feed source of the three-dimensional negative direction antenna through a multi-way switch. Further, the two receiving channels adopt independent channels for diversity receiving signals.

In this embodiment, the ad hoc directional network transmits power only in one of three dimensions each time each node 100 transmits a signal through a related networking protocol, that is, before the network nodes 100 communicate with each other, the positions of the dimensions are determined, and after the positions are determined, the purpose of designing a single power amplifier is achieved through the multi-way switch and the power divider 123, so that the complexity of hardware of each node 100 is reduced. In this embodiment, each node 100 implements a time-sharing omni-directional coverage effect without noise factor loss in the process of receiving signals by the node 100 through the design of six directional antenna combinations and two-way diversity signal reception.

The multi-way switch adopts a three-to-one switch, and the transmitting channel is respectively connected with the positive and negative antenna transmitting feed sources in the X axis direction, the Y axis direction and the Z axis direction through the three-to-one switch. One receiving channel is connected with a positive antenna receiving feed source in the X axis direction, the Y axis direction and the Z axis direction through a three-out-of-one switch; and the other receiving channel is connected with a negative antenna receiving feed source in the X-axis direction, the Y-axis direction and the Z-axis direction through a one-out-of-three switch. The two paths of receiving respectively enter into independent receiving channels, thereby realizing diversity receiving and avoiding noise coefficient loss caused by combining.

Further, based on the design of the access protocol for accessing the network of each node 100, the signal transceiving space in six directions is divided into three dimensions, i.e., an X axis, a Y axis, and a Z axis, and each signal transmission is performed in two directions of one dimension, e.g., signals are transmitted through positive and negative antennas on the X axis, which not only reduces the complexity of access, but also realizes the sharing of power amplifier by using the switch and the power divider 123, and the reception is freely selected through the protocol and the network topology. Each node 100 in this embodiment includes three antenna combinations, each antenna combination has two directional antennas, the three antenna combinations share one power amplifier, and a signal transmitting antenna is selected by one of three-out-of-one switches.

In one embodiment, based on the three-dimensional six-way antenna design in node 100, the slot cycle employs 3 x 3 slot segments; based on the three-dimensional six-way antenna combination in each node 100, the time slot cycle adopts 3 × 3 time slot segments; based on a network monitoring stage, the main node transmits a control signal, and the sub-nodes receive the control signal; in the antenna switching strategy, the main node switches a transmitting antenna once in a time slot segment, and three directions of three dimensions are completed in every three time slot segments in a traversing manner, so that the main node completes transmitting network control signals in different directions for nine times in a time slot period; and the sub-nodes switch the receiving antenna once every three time slot segments, and at least one time slot segment can receive the network control signal sent by the main node so as to obtain the relative position information with the main node.

In this embodiment, when each signal transceiving time slot segment is switched, the communication of the transmitting path or the receiving path is realized by switching the signal output branch of the phase locked source 132, so as to realize transceiving time-sharing communication by a single PLS (phase locked source).

The time slot cycle in this embodiment may use a time slot segment not limited to 3 × 3, that is, the time slot cycle includes several time slot segments, and since a three-dimensional six-way antenna combination is used, a preferred scheme uses a 3 × 3 time slot segment design, and if the antenna combination is other multi-way antenna combinations such as thirty-six way, forty-eight way, and the like instead of three-dimensional six way, the time slot segments of the time slot cycle may be set for the number of antennas in the antenna combination. The slot cycle may be interpreted as a regular timing design, and the antennas of the nodes 100 perform antenna switching control based on the same timing cycle. Therefore, it can be seen that, in the present embodiment, through the time sequence design and the switch selection, in the power amplifier pre-starting stage (network monitoring stage), each node 100 selects the switch of the transmitting feed source and the direction of the receiving feed source, so as to solve the contradiction between the power amplifier stability and the transmit-receive interference. Polarization loss control between combined equipment is realized through the design of transmitting circular polarization and receiving linear polarization.

Each node 100 in this embodiment shares the antenna element 121 for transmitting and receiving based on the TDMA protocol, and selects a transmission and reception mode of the antenna element 121 through an alternative switch. In one embodiment, the start-up settling time of the power amplifier 131 needs 1ms, so that the power amplifier 131 needs to be turned on in advance before the transmission time slot of each node 100 arrives, and the substrate noise of the power amplifier 131 is amplified although the transmission time slot has not yet been reached. In order to prevent the base noise from affecting the normal operation of the node 100 through the transmitting antenna-receiving antenna loop and avoid the transmit-receive interference, in this embodiment, the switch of the transmitting feed source is selected in a direction different from that of the receiving feed source, and when the next time slot segment requires the node 100 to transmit a signal, the transmitting feed source is selected in a desired direction. Because the switching time of the power electronic switch is generally less than microsecond, the delay controlled by the intermediate frequency signal output controlled by the digital baseband is also less than microsecond, and the communication time slot is generally in a sub-millisecond level, the switching experiment does not influence the communication process of the time division system. After the access is completed, each node 100 needs to switch the transceiving state according to the time slot under the control of the TDMA network protocol. According to the half-duplex network protocol, there is no mode of simultaneous transceiving in one direction. However, there are cases where transmission and reception slots alternate in a certain direction. In order to avoid the co-channel interference of the transmitting and receiving antennas under the condition, the position isolation of different antennas is required to be fully utilized. Taking X-direction communication as an example, when the current time slot is received in the X direction, if the next time slot is transmitted in the X direction, the following operations are performed:

switching the transmit antenna to the next dimension (cycled in X-Y-Z) Y through a transmit switch network; starting the power amplifier, and simultaneously controlling the baseband not to transmit signals, so that the output end of the power amplifier only has thermal noise amplification output; the isolation among antennas with different dimensions is ensured through the antenna layout design, so that the thermal noise of the transmitting antenna does not influence the normal work of the receiving branch; after the X-direction receiving time slot is completed, the transmitting antenna is switched back to the X direction, and the baseband output is controlled to carry out the normal transmitting process. In order to ensure reliable communication at any relative position, the design of the antenna member 121 adopts a transmitting circular polarization/receiving linear polarization design to realize that the polarization loss between networking devices is controlled, and the maximum polarization loss does not exceed 3 dB.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.