CN111556591A - Remote communication networking system for complex disaster environment - Google Patents
Remote communication networking system for complex disaster environment Download PDFInfo
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- CN111556591A CN111556591A CN202010336833.0A CN202010336833A CN111556591A CN 111556591 A CN111556591 A CN 111556591A CN 202010336833 A CN202010336833 A CN 202010336833A CN 111556591 A CN111556591 A CN 111556591A
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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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0071—Use of interleaving
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/90—Services for handling of emergency or hazardous situations, e.g. earthquake and tsunami warning systems [ETWS]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
- H04W74/0816—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision avoidance
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access, e.g. scheduled or random access
- H04W74/08—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access]
- H04W74/0808—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA
- H04W74/0825—Non-scheduled or contention based access, e.g. random access, ALOHA, CSMA [Carrier Sense Multiple Access] using carrier sensing, e.g. as in CSMA carrier sensing with collision detection
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
A remote communication networking system for a complex disaster environment adopts a wireless ad hoc network communication technology to bear the communication of private network videos, audios and data, particularly forms a Mesh ad hoc network site information fusion access terminal, a Mesh ad hoc network remote relay and other equipment forms, and achieves network coverage and data remote transmission of the complex disaster site, wherein the site information fusion access terminal achieves site network coverage and data access, and the remote communication relay provides remote data transmission. By the method, an emergency communication network can be quickly established on a disaster site, and a channel is provided for realizing high-speed and long-distance transmission of life search and rescue information.
Description
Technical Field
The invention relates to a communication networking system, in particular to a remote communication networking system in a complex disaster environment.
Background
Under complex disaster environments such as earthquakes and debris flows, public networks are often damaged in a large area, and emergency communication is particularly important at the moment.
The invention mainly aims at the problem and provides an emergency communication networking system for a complex disaster environment, which ensures smooth emergency communication of a disaster site and can reliably transmit search and rescue information such as voice, video, data and the like back to a rear command department in time.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a remote communication networking system in a complex disaster environment, which adopts a wireless ad hoc network communication technology and is used for bearing the communication of private network video, audio and data, and particularly forms equipment forms such as a Mesh ad hoc network field information fusion access terminal and a Mesh ad hoc network remote relay. The network coverage and the data remote transmission of a complex disaster site are realized, wherein the site information fusion access terminal realizes the site network coverage and the data access, and the remote communication relay provides the remote data transmission.
In order to achieve the purpose, the invention adopts the technical scheme that:
a remote communication networking system for a complex disaster environment is characterized in that: the method comprises the steps that Mesh ad hoc network equipment is constructed on a disaster site, and the Mesh ad hoc network equipment consists of a site information fusion access terminal and an ad hoc network remote communication relay;
the Mesh ad hoc network device comprises: the physical layer adopts OFDM technology and MIMO technology, the transmission mode adopts QAM and Turbo code combination mode, and the MIMO-OFDM system is combined with the adaptive modulation technology; the Mac layer adopts a carrier sense multiple access method, and aggregates a plurality of short frames into a long frame by using frame aggregation under the condition of not generating extra time delay.
The specific method for combining the MIMO-OFDM system and the adaptive modulation technology comprises the following steps: the MIMO-OFDM system expands the signal processing of wireless communication from time-frequency diversity to space-time frequency diversity, detects the channel state in real time, changes the level of transmitting power and the size of QAM constellation according to the actual condition of a transmission channel, adapts to the change of the channel environment, and gives consideration to high spectral efficiency and high transmission reliability.
The Mac layer adopts a carrier sense multiple access method, and a specific method for aggregating a plurality of short frames into a long frame by using frame aggregation under the condition of not generating extra time delay comprises the following steps: monitoring a channel before sending, and immediately transmitting if the channel is idle; if the channel is busy, monitoring till the channel is idle and transmitting immediately; if collision is detected, immediately stopping transmission, waiting for a random time and repeating the steps; and combining and transmitting a plurality of short frames while waiting for transmission.
The field information fusion access terminal provides WIFI interface and internet access, realizes seamless connection with each detection device on the field, accesses detection information of voice, video and data types, and constructs a regional star-shaped or mesh-shaped overlay network on a disaster field.
The site information fusion access terminal is provided with the site information fusion access terminal by taking a rescue squad as a unit, and a regional star-shaped or mesh-shaped coverage network is constructed on a disaster site after the terminal is started, so that the disaster site ad hoc network is realized.
The ad hoc network remote communication relay establishes a remote communication backbone network from a scene to a command platform in a disaster scene.
The networking remote communication relay adopts larger transmitting power compared with the field information fusion access terminal, and is matched with the field information fusion access terminal of the mesh networking to deploy the networking remote communication relay at a disaster field in a chain type large distance, so that a remote communication backbone network from the scene to a command platform is established in a disaster scene.
The invention has the beneficial effects that:
according to the remote communication networking system for the complex disaster environment, the networking design with high stability, low time delay, high bandwidth and low band loss is completed, and finally, an emergency communication network can be quickly established on a disaster site, so that a channel is provided for realizing high-speed and remote transmission of life search and rescue information.
Drawings
Fig. 1 is a general architecture diagram of the system.
Fig. 2 is a mesh communication network of an ad hoc network field information fusion access terminal.
Fig. 3 is a chain communication network of ad hoc network long-distance communication relay.
Detailed Description
A remote communication networking system for a complex disaster environment is characterized in that Mesh ad hoc network equipment is constructed on a disaster site, and the Mesh ad hoc network equipment is composed of a site information fusion access terminal 1 and an ad hoc network remote communication relay 2.
The field information fusion access terminal and the ad hoc network remote communication relay are wireless Mesh ad hoc network equipment, are wireless Mesh communication bearing systems designed on the basis of a physical layer technology, an MAC layer technology, a radio frequency technology and the like, complete the high stability, low time delay and high bandwidth design of the networking through the optimization design of the system, and finally can quickly build an emergency communication network on a disaster site to provide a channel for realizing the high-speed and remote transmission of life search and rescue information.
The core algorithm and networking protocol of the ad hoc network communication technology are designed according to a software radio architecture. The field information fusion access terminal and the ad hoc network remote communication relay are Mesh ad hoc network devices, and the field information fusion access terminal is actually a miniaturized Mesh ad hoc network device and provides field network coverage and access of multi-source signals; the ad hoc network remote communication relay is a high-power Mesh ad hoc network device and provides long-distance data transmission. The ad hoc network communication equipment mainly comprises a power management unit, a data processing unit, a radio frequency front end and an antenna feeder unit. The data processing unit mainly completes the realization of a physical layer protocol algorithm, an MAC layer protocol algorithm and a two-layer routing scheduling algorithm. The power management unit ensures the low-noise design and the low-stray design of the front end part of the radio frequency and the electromagnetic compatibility design of a system through a power denoising technology, and improves the reliability and the stability.
The Mesh ad hoc network device comprises: the physical layer adopts OFDM technology and MIMO technology, the transmission mode adopts QAM and Turbo code combination mode, and the MIMO-OFDM system is combined with the adaptive modulation technology; the Mac layer adopts a carrier sense multiple access method, and aggregates a plurality of short frames into a long frame by using frame aggregation under the condition of not generating extra time delay.
The specific method for combining the MIMO-OFDM system and the adaptive modulation technology comprises the following steps: the MIMO-OFDM system expands the signal processing of wireless communication from time-frequency diversity to space-time frequency diversity, detects the channel state in real time, changes the level of transmitting power and the size of QAM constellation according to the actual condition of a transmission channel, adapts to the change of the channel environment, and gives consideration to high spectral efficiency and high transmission reliability.
The Mac layer adopts a carrier sense multiple access method, and a specific method for aggregating a plurality of short frames into a long frame by using frame aggregation under the condition of not generating extra time delay comprises the following steps: monitoring a channel before sending, and immediately transmitting if the channel is idle; if the channel is busy, monitoring till the channel is idle and transmitting immediately; if collision is detected, immediately stopping transmission, waiting for a random time and repeating the steps; and combining and transmitting a plurality of short frames while waiting for transmission.
The specific subentry design:
the field information fusion access terminal 1 provides WIFI interface and internet access, realizes seamless butt joint with each detection device on the field, accesses detection information of voice, video and data types, and constructs a regional star-shaped or mesh-shaped overlay network on a disaster field. The field information fusion access terminal 1 is provided with a field information fusion access terminal by taking a rescue squad as a unit, and after the terminal is started, a regional star-shaped or mesh-shaped coverage network is constructed on a disaster field, so that the disaster field ad hoc network is realized.
The ad hoc network remote communication relay 2 establishes a remote communication backbone network from a scene to a command platform in a disaster scene. The networking remote communication relay 2 adopts larger transmitting power compared with the field information fusion access terminal 1, and is matched with the field information fusion access terminal 1 of the mesh networking to deploy the networking remote communication relay 2 at a disaster field in a chain type large distance, so that a remote communication backbone network from the field to a command platform is established in the disaster scene.
Claims (7)
1. A remote communication networking system for a complex disaster environment is characterized in that: the method comprises the steps that Mesh ad hoc network equipment is constructed on a disaster site, and the Mesh ad hoc network equipment consists of a site information fusion access terminal (1) and an ad hoc network remote communication relay (2);
the Mesh ad hoc network device comprises: the physical layer adopts OFDM technology and MIMO technology, the transmission mode adopts QAM and Turbo code combination mode, and the MIMO-OFDM system is combined with the adaptive modulation technology; the Mac layer adopts a carrier sense multiple access method, and aggregates a plurality of short frames into a long frame by using frame aggregation under the condition of not generating extra time delay.
2. A complex disaster environment telecommunication networking system according to claim 1, wherein: the specific method for combining the MIMO-OFDM system and the adaptive modulation technology comprises the following steps: the MIMO-OFDM system expands the signal processing of wireless communication from time-frequency diversity to space-time frequency diversity, detects the channel state in real time, changes the level of transmitting power and the size of QAM constellation according to the actual condition of a transmission channel, adapts to the change of the channel environment, and gives consideration to high spectral efficiency and high transmission reliability.
3. A complex disaster environment telecommunication networking system according to claim 1, wherein: the Mac layer adopts a carrier sense multiple access method, and a specific method for aggregating a plurality of short frames into a long frame by using frame aggregation under the condition of not generating extra time delay comprises the following steps: monitoring a channel before sending, and immediately transmitting if the channel is idle; if the channel is busy, monitoring till the channel is idle and transmitting immediately; if collision is detected, immediately stopping transmission, waiting for a random time and repeating the steps; and combining and transmitting a plurality of short frames while waiting for transmission.
4. A complex disaster environment telecommunication networking system according to claim 1, wherein: the field information fusion access terminal (1) provides WIFI interface and network port access, realizes seamless butt joint with each detection device on the field, accesses detection information of voice, video and data types, and constructs a regional star-shaped or mesh-shaped coverage network on a disaster field.
5. The complex disaster environment telecommunication networking system as set forth in claim 4, wherein: the field information fusion access terminal (1) is provided with the field information fusion access terminal (1) by taking a rescue squad as a unit, and a regional star-shaped or mesh-shaped coverage network is constructed on a disaster field after the terminal is started, so that emergency networking of the disaster field is realized.
6. A complex disaster environment telecommunication networking system according to claim 1, wherein: the ad hoc network remote communication relay (2) establishes a remote communication backbone network from a scene to a command platform in a disaster scene.
7. A complex disaster environment telecommunication networking system according to claim 6, wherein: the networking remote communication relay (2) adopts larger transmitting power compared with the field information fusion access terminal (1), and is matched with the field information fusion access terminal (1) of the mesh networking to deploy the networking remote communication relay (2) at a disaster field in a chain type large-distance mode, so that a remote communication backbone network from the disaster field to the command platform is established in the disaster scene.
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Cited By (1)
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| CN115297049A (en) * | 2022-07-05 | 2022-11-04 | 河南科技大学 | Joint decision fusion and channel estimation method for multi-routing multi-relay network |
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