CN114401071A - Ad hoc network communication system based on spectrum sensing - Google Patents
Ad hoc network communication system based on spectrum sensing Download PDFInfo
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- CN114401071A CN114401071A CN202210208371.3A CN202210208371A CN114401071A CN 114401071 A CN114401071 A CN 114401071A CN 202210208371 A CN202210208371 A CN 202210208371A CN 114401071 A CN114401071 A CN 114401071A
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- 238000004891 communication Methods 0.000 title claims abstract description 50
- 238000001228 spectrum Methods 0.000 title claims abstract description 27
- 230000005540 biological transmission Effects 0.000 claims abstract description 36
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 230000008447 perception Effects 0.000 claims description 6
- 238000010183 spectrum analysis Methods 0.000 abstract description 3
- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000013475 authorization Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/20—Countermeasures against jamming
- H04K3/22—Countermeasures against jamming including jamming detection and monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/382—Monitoring; Testing of propagation channels for resource allocation, admission control or handover
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/20—Countermeasures against jamming
- H04K3/25—Countermeasures against jamming based on characteristics of target signal or of transmission, e.g. using direct sequence spread spectrum or fast frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K3/00—Jamming of communication; Counter-measures
- H04K3/40—Jamming having variable characteristics
- H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K2203/00—Jamming of communication; Countermeasures
- H04K2203/10—Jamming or countermeasure used for a particular application
- H04K2203/18—Jamming or countermeasure used for a particular application for wireless local area networks or WLAN
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radar, Positioning & Navigation (AREA)
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Abstract
The invention discloses a self-networking communication system based on spectrum sensing, which comprises a terminal device and a communication system connected with the terminal device, wherein the communication system consists of a self-networking transmission unit, a spectrum sensing unit and a narrow-band communication unit: the ad hoc network transmission unit is responsible for transparent transmission of service data and can perform channel switching by receiving an instruction; the spectrum sensing unit is responsible for detection of interference signals, calculation of optimal channels, selection of decision nodes and decision of channel switching; and the narrow-band communication unit is responsible for reporting a node frequency sweep report and transmitting a channel switching instruction. The invention has scientific and reasonable structural design, can automatically switch channels through frequency spectrum analysis and automatic decision when the terminal equipment is subjected to electromagnetic interference, achieves the purpose of automatically avoiding interfered frequency points, ensures the reliability and effectiveness of system work, and improves the system operation efficiency.
Description
Technical Field
The invention relates to the technical field of ad hoc network communication systems, in particular to an ad hoc network communication system based on spectrum sensing.
Background
In the environment with complex electromagnetic environment, the working mode of the fixed frequency point is easy to be interfered and can not work. Aiming at the anti-interference problem, a working mode with an electromagnetic environment sensing function for automatically adjusting frequency points needs to be researched, so that the frequency points and the routes can be automatically detected and avoid interference frequency bands, dynamic adjustment can be carried out at any time, and the usability of the system is ensured. The existing communication system has the following defects: the traditional ad hoc network communication system adopts a working mode of fixed frequency points, all nodes adopt the same frequency points for communication, and when the frequency points are interfered, the communication quality can be rapidly deteriorated and even the network is disconnected; the traditional ad hoc network communication system can set working frequency points in a manual mode, all node frequency points are required to be set to be the same frequency points to work, the configuration workload is large, the method can only be configured and deployed in advance, and automatic switching cannot be carried out according to the environment; the traditional ad hoc network communication system has a narrow frequency working range and a small number of settable frequency points, and can face an embarrassing situation without available frequency points when being interfered. Therefore, an ad hoc network communication system based on spectrum sensing is provided.
Disclosure of Invention
The invention aims to provide an ad hoc network communication system based on spectrum sensing to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a communication system of ad hoc network based on frequency spectrum perception, includes terminal equipment and the communication system who connects with it, communication system comprises ad hoc network transmission unit, frequency spectrum perception unit and narrowband communication unit: the ad hoc network transmission unit is responsible for transparent transmission of service data and can perform channel switching by receiving an instruction; the spectrum sensing unit is responsible for detection of interference signals, calculation of optimal channels, selection of decision nodes and decision of channel switching; and the narrow-band communication unit is responsible for reporting a node frequency sweep report and transmitting a channel switching instruction.
Preferably, the ad hoc network transmission unit is a service transmission unit, and the working band is in an L band.
Preferably, the spectrum sensing unit serves the ad hoc network transmission unit, and aims to timely switch the ad hoc network transmission unit to an idle channel through an interface when the interference occurs.
Preferably, the narrowband communication unit works in a U-band and is used for transmitting status reports and channel switching instructions between nodes, when the narrowband communication unit is interfered, the operation of the ad hoc network transmission unit is not affected, and when the ad hoc network transmission unit is interfered, the narrowband communication unit can transmit instructions, so that the ad hoc network transmission unit is switched to an idle channel.
Compared with the prior art, the invention has the beneficial effects that: this kind of from network deployment communication system based on frequency spectrum perception, structural design is simple reasonable, has stronger practicality, through adopting the communication system that network deployment transmission unit, frequency spectrum perception unit and narrowband communication unit are constituteed, form the anti jamming technique who is applicable to from network deployment communication architecture, when terminal equipment received electromagnetic interference, can carry out the switching of channel through spectral analysis and automatic decision-making automatically, reach the purpose of avoiding the frequency point of interference automatically, guarantee the reliability and the validity of system work, system operating efficiency has been improved.
Drawings
Fig. 1 is a schematic diagram of a networking system structure of the present invention.
Fig. 2 is a block diagram illustrating the operation of the node according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a communication system of Ad hoc network based on frequency spectrum perception, includes terminal equipment and the communication system who is connected with it, its characterized in that: the communication system is composed of an ad hoc network transmission unit, a frequency spectrum sensing unit and a narrow-band communication unit: the Ad hoc network transmission unit is responsible for transparent transmission of service data and can perform channel switching by receiving an instruction, and the Ad hoc network transmission unit is a service transmission unit and works in an L waveband;
the spectrum sensing unit is responsible for detection of interference signals, calculation of optimal channels, election of decision nodes and decision of channel switching, serves the ad hoc network transmission unit, and aims to timely switch the ad hoc network transmission unit to an idle channel through an interface when interference occurs, so that reliability of service is guaranteed;
the narrow-band communication unit is responsible for reporting node frequency sweep reports and transmitting channel switching instructions, works in a U-band, and is used for transmitting state reports and channel switching instructions among nodes by utilizing the characteristics of high sensitivity and long transmission distance. When the narrow-band communication unit (U wave band) is interfered, the operation of the self-organized network transmission unit (L wave band) is not influenced, and when the self-organized network transmission unit is interfered, the narrow-band communication unit can transmit an instruction, so that the self-organized network transmission unit is switched to an idle channel.
All nodes can reliably, accurately and quickly detect interference signals by adopting energy detection and matched filtering detection methods through the spectrum sensing unit.
On the basis, the obtained frequency spectrum information is analyzed through frequency spectrum scanning, channel state information such as interference conditions, path loss, link delay and occupation conditions of an authorization system in parallel channels is calculated and obtained, channels occupied by interfered or authorized users are judged through an algorithm, interference factors of all the channels are calculated, and accordingly a frequency sweeping state report is generated.
In order to adapt to the non-central characteristic of the self-networking communication system, a decision method of the maximum address in the network is adopted to select decision nodes, any node can be added or quit the system at any time, and the system automatically selects a new decision node according to rules.
And the decision node performs weighted average on the received state report by adopting a sliding window, calculates and obtains the interference factor of the current working channel in the whole network and the optimal alternative channel, and executes channel switching and sends the channel number to the whole network if the interference factor of the current working channel exceeds a threshold value.
The radio frequency module supports a frequency working range of > =100Mhz, the central frequency point of a channel is stepped by 1Mhz, and enough channels can be switched to avoid an interference source.
The communication system consisting of the ad hoc network transmission unit, the frequency spectrum sensing unit and the narrow-band communication unit forms an anti-interference technology suitable for an ad hoc network communication architecture, when the terminal equipment is subjected to electromagnetic interference, the channel switching can be automatically carried out through frequency spectrum analysis and automatic decision, the purpose of automatically avoiding the frequency point of the interference is achieved, and the reliability and effectiveness of the system work are ensured
The working principle is as follows:
in the self-networking communication system based on spectrum sensing, after a node is electrified and started, a data packet on a network is monitored firstly, a source address of a sender is recorded and compared, after 2N data packets are continuously received (N is the number of the node, the default is 10), the maximum source address and the source address of the node are compared, if the address of the node is the maximum in the network, the node is the only decision node in the network, otherwise, the node is taken as a slave node;
each slave node periodically scans frequency spectrums, generates frequency sweep reports of the cost node and periodically sends frequency sweep state reports to the decision node, meanwhile, receives working channel numbers sent by the decision node, compares the working channel numbers with the current working channel, and switches to the channel if the working channel numbers are inconsistent;
and the decision node evaluates whether the current working channel is interfered in the whole network range and the optimal alternative channel in the whole network range in a certain sliding window by collecting the sweep frequency state report reported by each node, switches to the optimal alternative channel if the interference factor of the current working channel is found to exceed a threshold value, and broadcasts the channel number to the whole network through the narrow-band communication unit.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a communication system of Ad hoc network based on frequency spectrum perception, includes terminal equipment and the communication system who is connected with it, its characterized in that: the communication system is composed of an ad hoc network transmission unit, a frequency spectrum sensing unit and a narrow-band communication unit: the ad hoc network transmission unit is responsible for transparent transmission of service data and can perform channel switching by receiving an instruction; the spectrum sensing unit is responsible for detection of interference signals, calculation of optimal channels, selection of decision nodes and decision of channel switching; and the narrow-band communication unit is responsible for reporting a node frequency sweep report and transmitting a channel switching instruction.
2. The system according to claim 1, wherein: the ad hoc network transmission unit is a service transmission unit, and the working waveband is in an L waveband.
3. The system according to claim 1, wherein: the spectrum sensing unit serves the ad hoc network transmission unit and aims to timely switch the ad hoc network transmission unit to an idle channel through an interface when the interference occurs.
4. The system according to claim 1, wherein: the narrow-band communication unit works in a U wave band and is used for transmitting state reports and channel switching instructions among nodes, when the narrow-band communication unit is interfered, the operation of the ad hoc network transmission unit is not influenced, and when the ad hoc network transmission unit is interfered, the narrow-band communication unit can transmit the instructions, so that the ad hoc network transmission unit is switched to an idle channel.
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| CN202210208371.3A CN114401071A (en) | 2022-03-04 | 2022-03-04 | Ad hoc network communication system based on spectrum sensing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116233856A (en) * | 2023-05-05 | 2023-06-06 | 国网信息通信产业集团有限公司 | MESH ad hoc network communication device and method based on emergency communication system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116233856A (en) * | 2023-05-05 | 2023-06-06 | 国网信息通信产业集团有限公司 | MESH ad hoc network communication device and method based on emergency communication system |
| CN116233856B (en) * | 2023-05-05 | 2023-10-27 | 国网信息通信产业集团有限公司 | MESH ad hoc network communication device and method based on emergency communication system |
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