CN112333837A - Mobile ad hoc network communication system and method supporting multi-hop - Google Patents
Mobile ad hoc network communication system and method supporting multi-hop Download PDFInfo
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
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- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
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Abstract
The application relates to a mobile ad hoc network communication system and a method supporting multi-hop, wherein the system comprises the following steps: the system comprises a satellite communication system, an ad hoc network terminal and a search terminal, wherein the ad hoc network terminal and the search terminal are respectively used as networking nodes to form a mobile ad hoc network; the ad hoc network terminal comprises a satellite communication module for performing communication connection between the ad hoc network terminal and a satellite communication system, an ad hoc network module for performing ad hoc network communication connection between the ad hoc network terminal and other terminals, a position information acquisition module for acquiring position information of the ad hoc network terminal, and a position information sending module for sending the position information to the search terminal; the search terminal comprises a search networking module for performing ad hoc network communication connection between the search terminal and other terminals, a position information receiving module for receiving position information, and a search processing module for planning an optimal navigation path to a corresponding target terminal; the method and the device have the advantages that the advantages of satellite communication and ad hoc network communication are combined, and the efficiency of material searching can be improved.
Description
Technical Field
The present application relates to the field of wireless communication technologies, and in particular, to a mobile ad hoc network communication system and method supporting multiple hops.
Background
In emergency rescue and disaster relief and military operations, the mode of allocating materials through air-dropping is widely applied, and the accurate search of the air-dropped materials is a difficult task. In the related technology, a satellite positioning module is installed in the airdropped goods and the longitude and latitude position information of the airdropped goods is sent to a searching device of a searching person through a satellite communication mode through the satellite communication module.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: due to the unknown and complicated searching geographic environment, the satellite signal may be lost or unstable, and the airdrop materials cannot be searched in time, which affects the performance of the material searching task.
Disclosure of Invention
In order to improve the efficiency of airdrop material search, the application provides a mobile ad hoc network communication system and method supporting multi-hop, and the system and method have the advantage of improving the efficiency of airdrop material search to a certain extent by combining the advantages of satellite communication and ad hoc network communication.
The above object of the present application is achieved by the following means.
In a first aspect, the present application provides a mobile ad hoc network communication system supporting multi-hop, comprising: the system comprises a satellite communication system, an ad hoc network terminal and a search terminal, wherein the ad hoc network terminal and the search terminal are respectively used as networking nodes to form a mobile ad hoc network;
the ad hoc network terminal comprises a satellite communication module, an ad hoc network module, a position information acquisition module and a position information sending module;
the satellite communication module is used for the communication connection between the ad hoc network terminal and the satellite communication system; the ad hoc network module is used for ad hoc network communication connection between the ad hoc network terminal and other terminals; the position information acquisition module is used for acquiring the position information of the ad hoc network terminal; the position information sending module is used for sending the position information to the searching terminal;
the searching terminal comprises a searching networking module, a position information receiving module and a searching processing module;
the searching networking module is used for ad hoc network communication connection between the searching terminal and other terminals; the position information receiving module is used for receiving the position information of the ad hoc network terminal; and the searching processing module is used for planning an optimal navigation path to a corresponding target terminal according to the position information of the ad hoc network terminal.
By adopting the technical scheme, the self-networking terminal is in communication connection with the satellite communication system by arranging the satellite communication system, the self-networking terminal and the searching terminal form the mobile self-networking, the self-networking terminal sends the acquired self position information to the searching terminal, the searching terminal plans the optimal navigation path to the corresponding target terminal according to the received position information, and by combining the advantages of the satellite communication and the mobile self-networking, the efficiency of material searching can be improved, and the material searching task can be completed in time.
Further, the satellite communication system is a Beidou satellite communication system.
By adopting the technical scheme, the Beidou satellite communication system is adopted, so that higher precision can be achieved, and the safety of data transmission is ensured.
Further, the mobile ad hoc network comprises a plurality of sub-networks, wherein each sub-network comprises a cluster head node and one or more common nodes;
in the same subnet, the common nodes are respectively in communication connection with the cluster head nodes, and different subnets are in communication connection through the cluster head nodes.
By adopting the technical scheme, the mobile ad hoc network is divided into a plurality of sub-networks in a multi-dimensional mode, the number of access nodes of the mobile ad hoc network can be increased by adopting a communication mode of the sub-networks, and the network access capacity is improved.
Furthermore, in the same subnet, the communication connection between the common node and the cluster head node adopts a time division multiple access mode, each subnet node occupies a time slot to transmit data, and other time slots are in a receiving or sleeping state; different subnets operate on different frequencies.
By adopting the technical scheme, the node connection in the same subnet adopts a time division multiple access connection mode, a plurality of subnets work on different frequencies, and the communication between the subnets carries out information interaction through the cluster head node, so that mutual interference can be avoided.
Furthermore, the position information acquisition module comprises a satellite positioning acquisition unit and an ad hoc network positioning acquisition unit;
when satellite communication signal connection exists, the position information is acquired through the satellite positioning acquisition unit;
and when the satellite communication signal connection does not exist, the position information is acquired through the ad hoc network positioning acquisition unit.
By adopting the technical scheme, when the position information of the Ad hoc network terminal is acquired, the position information is preferentially acquired in a satellite positioning mode, and the position information is acquired by the Ad hoc network positioning acquisition unit under the condition that the satellite communication signal is lost, so that the stability and the reliability of acquiring the positioning information can be improved.
Furthermore, the search terminal and the ad hoc network terminal respectively further comprise a networking updating module, and the networking updating module automatically adjusts and updates the network connection of the mobile ad hoc network according to the connection condition of other networking nodes.
By adopting the technical scheme, the networking updating module can automatically adjust and update the network connection of the mobile ad hoc network according to the connection condition of each terminal in the material searching process, so that the searching progress can be mastered at any time, and the material searching efficiency is improved.
Furthermore, the ad hoc network module and the searching networking module respectively adopt a physical layer transmission mode based on single carrier frequency division multiple access (SC-FDMA).
By adopting the technical scheme, the ad hoc network module and the searching networking module respectively adopt a physical layer transmission mode based on single carrier frequency division multiple access SC-FDMA, so that intersymbol interference of a wireless channel can be overcome, and the signal transmission quality is improved.
Furthermore, the search terminal and the ad hoc network terminal respectively further comprise a power control module;
the power control module changes the transmitting power by power self-adaption so as to adapt to the change of the channel condition; when the data rate adaptive channel condition is good, the smaller transmitting power is adopted, and when the channel condition is poor, the larger transmitting power is adopted.
By adopting the technical scheme, the power control module adaptively changes the transmitting power, so that the system can obtain fixed transmission rate and time delay with the minimum transmitting power, the communication quality is ensured, and the electric energy consumption can be saved.
Further, still include: and when the fading depth of the channel is lower than a preset threshold value, interrupting signal transmission through the power control module.
By adopting the technical scheme, the constant receiving signal-to-noise ratio can be ensured, and signal transmission errors are avoided.
In a second aspect, the application further provides a mobile ad hoc network communication method, and the method has the advantage of improving the airdrop material searching efficiency to a certain extent by combining the advantages of satellite communication and ad hoc network communication.
The provided mobile ad hoc network communication method is realized by the following technical scheme:
a mobile ad hoc network communication method, which adopts any one of the above mobile ad hoc network communication systems supporting multi-hop, the method comprising:
before the materials are airdropped, the ad hoc network terminal is placed in the materials to be airdropped;
after the materials are airdropped, the ad hoc network terminal placed in the airdropped materials starts to work, and the position information acquisition modules respectively acquire position information of the ad hoc network terminal;
in the material searching process, the searching terminal and the ad hoc network terminal in the airdropped materials are respectively used as network nodes to form a mobile ad hoc network; the ad hoc network terminal preferentially adopts satellite positioning and sends the position information to the search terminal; and when the terminal cannot receive the satellite positioning signal, the mobile ad hoc network is adopted for positioning, and the position information is sent to the search terminal.
And the searching terminal plans an optimal navigation path to the corresponding target terminal according to the received position information.
By adopting the technical scheme, before the materials are airdropped, the ad hoc network terminal is placed in the materials required to be airdropped, and in the material searching process, the searching materials are positioned and searched by combining satellite communication and ad hoc network communication, so that the searching efficiency can be improved, and the material searching task can be timely completed.
In summary, the present application at least includes at least one of the following beneficial technical effects:
(1) by combining the advantages of satellite communication and mobile ad hoc network, the efficiency of material searching can be improved, and the material searching task can be completed in time;
(2) the mobile ad hoc network is divided in a multi-dimensional mode, and the number of access nodes of the mobile ad hoc network can be increased and the network access capacity is improved by adopting a mode of communication of a plurality of subnets;
(3) when the position information of the Ad hoc network terminal is acquired, the position information is preferentially acquired in a satellite positioning mode, and the position information is acquired through the Ad hoc network positioning acquisition unit under the condition that satellite communication signals are absent, so that the stability and the reliability of acquiring the positioning information can be improved;
(4) the power control module adaptively changes the transmitting power, so that the system can obtain fixed transmission rate and time delay with the minimum transmitting power, the communication quality is ensured, and the power consumption of the equipment can be reduced.
Drawings
Fig. 1 is a system block diagram of a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
Fig. 2 is a system diagram illustrating subnet partitioning of a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
Fig. 3 is a block diagram of a terminal in a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
Fig. 4 is a flowchart illustrating an SC-FDMA based physical layer transmission method in a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
Fig. 5 is a flowchart illustrating a mobile ad hoc network communication method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The ad hoc network is a centerless, multi-hop and temporary autonomous system formed by a group of devices with functions of terminals and routing through wireless links. When a node is mobile, it is called a mobile ad hoc network. In an ad hoc network, each user terminal can not only move, but also has the functions of a host and a router. On one hand, as a host, the terminal needs to run various user-oriented applications; on the other hand, as a router, the terminal needs to run a corresponding routing protocol, and complete packet forwarding and routing maintenance of data according to a routing policy and a routing table.
The embodiments of the present application will be described in further detail with reference to the drawings attached hereto.
Fig. 1 is a system block diagram of a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
As shown in fig. 1, the embodiment of the present application provides a mobile ad hoc network communication system supporting multi-hop, which includes a satellite communication system 1, a plurality of ad hoc network terminals 2, and one or more searching terminals 3. The ad hoc network terminal 2 is arranged in the materials needing to be airdropped and serves as a positioning device of the airdropped materials. In the material searching process, the ad hoc network terminal 2 and the searching terminal 3 are respectively used as networking nodes to form a mobile ad hoc network. In fig. 1, the solid lines represent ad hoc network communication connections and the dashed lines represent satellite communication connections.
In a specific embodiment, the satellite communication system 1 may be a beidou satellite communication system. The Beidou satellite system can provide high-precision, high-reliability positioning, navigation and time service for various users in a global range, all weather and all day long, has short message communication capacity, and already preliminarily has regional navigation, positioning and time service capacities, wherein the positioning precision is decimeter and centimeter level, the speed measurement precision is 0.2 meter/second, and the time service precision is 10 nanoseconds. Through adopting big dipper satellite communication system to fix a position, can reach higher positioning accuracy, also can further guarantee data transmission's security simultaneously.
The ad hoc network can adopt a mobile ad hoc network mode based on TDD (time division duplex), one radio frequency point is shared by receiving and transmitting, and different time slots are used for uplink and downlink for communication.
The searching personnel can search corresponding airdropped materials by positioning and searching through the searching terminal 3.
Fig. 2 is a system diagram illustrating subnet partitioning of a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
Since the position of the ad hoc network node is not fixed, the topological structure changes with time, and when the number of the nodes is too large, if a single multiple access mode is adopted, the wireless resource allocated to each node is reduced along with the increase of the number of the nodes, so that the embodiment of the application adopts a multidimensional access protocol.
As shown in fig. 2, the mobile ad hoc network formed by the ad hoc network terminal 2 and the search terminal 3 includes a plurality of subnets, wherein each subnet includes a cluster head node and a common node.
In a material searching application scene, the whole mobile ad hoc network is clustered and divided into a plurality of sub-networks, and each sub-network comprises a cluster head node and one or more common nodes. In the same subnet, common nodes are respectively in communication connection with the cluster head nodes, and different subnets are in communication connection through the cluster head nodes.
Furthermore, after the subnet is divided, in the same subnet, the common nodes are respectively connected to the cluster head node in a time division multiple access manner, each subnet node occupies one time slot for transmission, and other time slots are in a receiving or sleeping state. The data transmission between the nodes adopts different time slot transmission modes, and the data transmission modes do not interfere with each other.
The advantages of the subnet clustering protocol built according to the original method are that: the protocol is simple, the work is stable, the network overhead is low, and the reliability is high. The network capacity can be increased significantly, for example, the number of network nodes can reach 128 or more.
Fig. 3 is a block diagram of a terminal in a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
As shown in fig. 3, the ad hoc network terminal 2 and the search terminal 3 are communicatively connected via a mobile ad hoc network. The ad hoc network terminal 2 includes a satellite communication module 21, an ad hoc network module 22, a position information acquisition module 23, and a position information transmission module 24. The satellite communication module 21 and the ad hoc network module 22 are respectively connected to a position information obtaining module 23, and the position information obtaining module 23 is connected to a position information sending module 24.
The satellite communication module 21 is used for the ad hoc network terminal 2 to perform communication connection with the satellite communication system 1. The ad hoc network module 22 is used for ad hoc network communication connection between the ad hoc network terminal 2 and other terminals. The location information acquiring module 23 is configured to acquire location information of the ad hoc network terminal 2. The location information sending module 24 is configured to send the location information to the search terminal 3.
The search terminal 3 includes a search networking module 31, a location information receiving module 32, and a search processing module 33. The searching and networking module 32 is connected to the position information receiving module 31, and the searching and processing module 33 is connected to the searching and networking module 32.
The searching networking module 31 is configured to search for ad hoc network communication connection between the terminal 3 and another terminal. The location information receiving module 32 is configured to receive location information of the ad hoc network terminal 2. The search processing module 33 is configured to plan an optimal navigation path to a corresponding target terminal according to the location information of the ad hoc network terminal 2. Specifically, the search processing module 33 marks the position coordinates of the search target according to the acquired position information of the airdropped material and the map data of the search area acquired in advance, and calculates an optimal search path to perform path navigation.
Further, the search terminal 3 may include an ad hoc network radio and a command tablet. The searching networking module 31 is disposed in an ad hoc network radio station, and the ad hoc network radio station is used for performing communication connection with the ad hoc network terminal 2 through a mobile ad hoc network. The command platform is connected to the ad hoc network radio station, the position information receiving module 32 and the search processing module 33 are arranged in the command platform, and the command platform is used for receiving and processing position information, managing communication connection of the mobile ad hoc network, issuing information and the like.
In one embodiment, the location information obtaining module 23 of the ad hoc network terminal 2 includes a satellite positioning obtaining unit 231 and an ad hoc network positioning obtaining unit 232. The satellite positioning acquiring unit 231 is configured to acquire the position information of the terminal itself through a satellite communication system, and the ad hoc network positioning acquiring unit 232 is configured to acquire the position information of the terminal itself through a mobile ad hoc network.
In the case where the environmental condition of the material search is excellent, for example, if the beidou satellite communication system is adopted, when there is a satellite communication signal connection, the position information acquiring module 23 acquires the position information of the ad hoc network terminal 2 through the satellite positioning acquiring unit 231. In the case where the environmental condition of the material search is bad, when there is no satellite communication signal connection, the position information acquiring module 23 acquires the position information of the ad hoc network terminal 2 through the ad hoc network positioning acquiring unit 232.
In the goods and materials air-drop search, because the geographical environment of the air-drop area is unknown, the communication condition can not be guaranteed, the positioning of the air-drop goods and materials is easy to have errors, on the basis, the target position information is acquired by preferentially adopting a satellite communication positioning mode, the advantages of satellite communication positioning and mobile ad hoc network positioning can be fully utilized, the target positioning is more accurate, the air-drop goods and materials search is more facilitated, the goods and materials search precision and efficiency can be improved, and the search task can be smoothly completed.
In one specific embodiment, the search terminal 3 and the ad hoc network terminal 2 each further include a networking update module, and the networking update module automatically adjusts and updates the network connection of the mobile ad hoc network according to the connection condition of other networking nodes.
In the airdrop material searching process, the searching terminal 3 is moved continuously, and the position thereof is changed at any time. After a certain airdrop material is successfully searched, the corresponding ad hoc network terminal 2 also needs to be removed from the mobile ad hoc network. Therefore, each node of the mobile ad hoc network is constantly changing during the searching process. Therefore, the networking updating module is arranged, so that the network connection of the mobile ad hoc network can be automatically adjusted and updated, the searching progress can be mastered at any time, and the efficiency of material searching is improved.
In one embodiment, the ad hoc network module 22 and the search network module 31 respectively use a physical layer transmission method based on single carrier frequency division multiple access SC-FDMA.
Specifically, fig. 4 is a flowchart illustrating an SC-FDMA based physical layer transmission method in a mobile ad hoc network communication system supporting multi-hop according to an embodiment of the present application.
As shown in fig. 4, the input bit stream is subjected to channel coding, interleaving, serial-to-parallel conversion and constellation mapping to form a complex modulation symbol block. And then carrying out M-point DFT precoding transformation on the frequency domain symbol blocks to obtain frequency domain symbol blocks, mapping elements of the frequency domain symbol blocks to M inputs of an N (N > M) point IFFT transformation module, and carrying out N point IFFT operation. Then, cyclic prefix addition, serial-to-parallel conversion, and D/a conversion are performed to generate a time-domain transmission signal. And after the receiving end performs A/D conversion, serial-parallel conversion and cyclic prefix removal on the received SC-FDMA signal, a received time domain discrete signal block is formed. And performing FFT operation on the received discrete signal block, taking out a frequency domain symbol block on a corresponding subcarrier, performing IDFT operation and constellation mapping on the frequency domain symbol block to obtain a parallel bit sequence, and performing parallel-serial conversion, de-interleaving and channel decoding to obtain an output bit stream.
By adopting a physical layer transmission mode based on single carrier frequency division multiple access SC-FDMA and utilizing a Discrete Fourier Transform (DFT) matrix, a frequency domain symbol block of Orthogonal Frequency Division Multiplexing (OFDM) is precoded, so that a transmitted signal has a single carrier band-limited signal form without crosstalk, the intersymbol crosstalk of a wireless channel can be overcome, and the number of hop counts of an ad hoc network is increased. For example, after 8 hops or even 16 hops are reached, data can still be efficiently transmitted.
In one specific embodiment, the search terminal 3 and the ad hoc network terminal 2 each further include a power control module. Specifically, the power control module changes the magnitude of the transmit power through power adaptation to adapt to changes in channel conditions. When the data rate adaptive channel condition is good, the smaller transmitting power is adopted, and when the channel condition is poor, the larger transmitting power is adopted. Therefore, under different channel conditions, the transmitting end can ensure that the system obtains fixed transmission rate and delay with minimum transmitting power, and the power consumption of the equipment can be reduced while ensuring the communication quality.
Furthermore, when the fading depth of the channel is lower than a preset threshold value, signal transmission is interrupted through the power control module, so that a constant receiving signal-to-noise ratio is ensured, and the frequency spectrum utilization rate is improved.
The data speed self-adaption can dynamically change a modulation and coding mechanism of a sending end according to the communication environment and QoS requirements on the premise of ensuring the system performance so as to improve the utilization rate or transmission rate of system resources and obtain higher system throughput and capacity. The data rate adaptive technique adjusts the modulation and coding strategy of the system according to the channel state information fed back by the receiving end, and can be generally divided into estimation and prediction of a channel, selection of modulation and coding levels, a modulation and coding synchronization mechanism and an optimal mode selection algorithm.
The communication distance between terminals can be increased by combining the transmission power self-adaptation and dynamically changing the modulation and coding mechanism of the transmitting end. For example, the communication distance of the handheld terminal can exceed 3 kilometers, and the communication distance of the vehicle-mounted terminal can exceed 10 kilometers.
Fig. 5 is a flowchart illustrating a mobile ad hoc network communication method according to an embodiment of the present application.
As shown in fig. 5, a mobile ad hoc network communication method using any one of the above mobile ad hoc network communication systems supporting multi-hop, the method comprising:
The above embodiments are only used to describe the technical solutions of the present application in detail, but the above embodiments are only used to help understanding the method and the core idea of the present application, and should not be construed as limiting the present application. Those skilled in the art should also appreciate that various modifications and substitutions can be made without departing from the scope of the present disclosure.
Claims (10)
1. A mobile ad-hoc network communication system supporting multi-hop, comprising: the system comprises a satellite communication system, an ad hoc network terminal and a search terminal, wherein the ad hoc network terminal and the search terminal are respectively used as networking nodes to form a mobile ad hoc network;
the ad hoc network terminal comprises a satellite communication module, an ad hoc network module, a position information acquisition module and a position information sending module;
the satellite communication module is used for the communication connection between the ad hoc network terminal and the satellite communication system; the ad hoc network module is used for ad hoc network communication connection between the ad hoc network terminal and other terminals; the position information acquisition module is used for acquiring the position information of the ad hoc network terminal; the position information sending module is used for sending the position information to the searching terminal;
the searching terminal comprises a searching networking module, a position information receiving module and a searching processing module;
the searching networking module is used for ad hoc network communication connection between the searching terminal and other terminals; the position information receiving module is used for receiving the position information of the ad hoc network terminal; and the searching processing module is used for planning an optimal navigation path to a corresponding target terminal according to the position information of the ad hoc network terminal.
2. The system of claim 1, wherein the satellite communication system is a Beidou satellite communication system.
3. The system of claim 1 or 2, wherein the ad-hoc network comprises a plurality of subnets;
each sub network comprises a cluster head node and one or more common nodes;
in the same subnet, the common nodes are respectively in communication connection with the cluster head nodes, and different subnets are in communication connection through the cluster head nodes.
4. The system of claim 3, wherein in the same subnet, the communication connection between the common node and the cluster head node is in a time division multiple access manner, each subnet node occupies a time slot to transmit data, and other time slots are in a receiving or sleeping state; different subnets operate on different frequencies.
5. The system according to claim 1 or 2, wherein the position information acquiring module comprises a satellite positioning acquiring unit and an ad hoc network positioning acquiring unit;
when satellite communication signal connection exists, the position information of the ad hoc network terminal is obtained through the satellite positioning obtaining unit;
and when the satellite communication signal connection does not exist, the position information of the ad hoc network terminal is obtained through the ad hoc network positioning obtaining unit.
6. The communication system of claim 4, wherein the search terminal and the ad hoc network terminal each further comprise a networking update module, and the networking update module automatically adjusts and updates the network connection of the mobile ad hoc network according to the connection status of other networking nodes.
7. The communication system of claim 1 or 2, wherein the ad hoc module and the searching networking module respectively adopt a physical layer transmission mode based on single carrier frequency division multiple access (SC-FDMA).
8. The system according to claim 1 or 2, wherein the searching terminal and the ad hoc network terminal each further comprise a power control module;
the power control module changes the transmitting power by power self-adaption so as to adapt to the change of the channel condition; when the data rate adaptive channel condition is good, the smaller transmitting power is adopted, and when the channel condition is poor, the larger transmitting power is adopted.
9. The system of claim 8, further comprising: and when the fading depth of the channel is lower than a preset threshold value, interrupting signal transmission through the power control module.
10. A mobile ad-hoc network communication method using the mobile ad-hoc network communication system supporting multi-hop according to any one of claims 1 to 9, the method comprising:
before the materials are airdropped, the ad hoc network terminal is placed in the materials to be airdropped;
after the materials are airdropped, the ad hoc network terminal placed in the airdropped materials starts to work, and the position information acquisition modules respectively acquire position information of the ad hoc network terminal;
in the material searching process, the searching terminal and the ad hoc network terminal in the airdropped materials are respectively used as network nodes to form a mobile ad hoc network; the ad hoc network terminal preferentially adopts satellite positioning and sends the position information to the search terminal; when the terminal cannot receive satellite positioning signals, mobile ad hoc network positioning is adopted, and the position information is sent to the search terminal;
and the searching terminal plans an optimal navigation path to the corresponding target terminal according to the received position information.
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| CN116981114A (en) * | 2023-06-16 | 2023-10-31 | 三峡高科信息技术有限责任公司 | Search and rescue system based on ad hoc network technology |
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| CN116981114B (en) * | 2023-06-16 | 2024-02-13 | 三峡高科信息技术有限责任公司 | Search and rescue system based on ad hoc network technology |
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