CN109831799A - A kind of highly dynamic radio mobile ad-hoc network network-building method - Google Patents
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Abstract
The invention discloses a kind of highly dynamic radio mobile ad hoc networking methods, which comprises selects several high dynamic mobile nodes according to the network of five coating systems of Ad hoc composition planar configuration；Transport layer protocol, network layer protocol, MAC layer and/or the physical layer protocol of Configuration network and the security protocol of whole network, make the network performance of network meet data service QoS requirement and mission requirements.The present invention combines closely the different task scene of mobile ad-hoc network interior joint, uses different Routing Protocols according to the different move mode model of different scenes interior joint, and Routing Protocol is made to be more suitable node motion mode；Network-building method proposed by the invention has fully considered the influence of mobility difference that node causes by task attribute difference for performance of route protocol, and Routing Protocol adaptable therewith is selected according to different node motion modes, effectively ensures network performance.
Description
Technical field
The present invention relates to wireless networking technologies, and in particular to a kind of highly dynamic radio mobile ad-hoc network network-building method.
Background technique
MANET (Mobile Ad hoc Network, mobile ad-hoc network) is without relying on infrastructure, mobile node
(user terminal) dynamic group net, data in a manner of ad hoc are forwarded via neighbor node, are transmitted using multi-hop mode.Such network
Form breaches the geographic limitations of conventional wireless cellular network, more rapidly and efficiently can easily dispose, be applicable to
The occasion of urgency communication, application field are increasingly wide in range.Mobile ad-hoc network itself is also of increasing concern.
However, the mobility of node is simultaneously also to mobile ad-hoc network, especially high dynamic mobile ad-hoc network
Framework and Protocol Design bring stern challenge.When node motion speed is big, network topology change is frequent, inter-node link without
Method keeps long logical, and communication quality and network performance is caused to be affected.
Bibliography [1] (Chen Sijing: " high dynamic self-organizing unmanned plane network architecture design and model study ", computer
Journal, 2 months 2015, volume 42, the 2nd phase) propose a kind of high dynamic mobile ad-hoc network frame of changeable network mode
Structure scheme.The design includes two kinds of networking modes, node networking in a manner of TDMA.Article elaborates the access side of every kind of framework
Formula/data packet format and network management form, but basic framework is only related to, the protocol stack used is not described in detail.
Bibliography [2] (Xu Zhiming: " design of unmanned plane ad-hoc network communication architecture system ", high-tech communication,
2010 volume 20, the 6th phase) in have studied unmanned plane ad hoc network Novel Communication architecture, it is logical to analyze unmanned plane ad hoc network
Believe architecture application demand and feature, systematically devises the communication system double flat face frame of cognition plane and data plane interaction
Structure.However this article equally lacks the problem of practice operability.
Therefore, it is necessary to a kind of network-building methods on small-sized highly dynamic radio mobile ad-hoc network, solve high speed node
Between and data transmission and information mutual communication problem in the network of topological high dynamic variation.
Summary of the invention
It is an object of the invention to overcome above-mentioned technological deficiency, for the Networking Design of high dynamic mobile ad-hoc network,
The protocol stack design for focusing on solving the self-organizing network under high dynamic environment proposes a kind of highly dynamic radio mobile ad hoc network
Network network-building method.
To achieve the goals above, the invention proposes a kind of highly dynamic radio mobile ad hoc networking method, the sides
Method includes:
Select several high dynamic mobile nodes according to the network of five coating systems of Ad hoc composition planar configuration；
Transport layer protocol, network layer protocol, MAC layer and/or the physical layer protocol of Configuration network and the peace of whole network
Full agreement makes the network performance of network meet data service QoS requirement and mission requirements.
As a kind of improvement of the above method, the sum of the high dynamic mobile node is no more than 256.
As a kind of improvement of the above method, configured on the high dynamic mobile node: sensor, locating module, information
Storage and processing equipment, multi-frequency radio transmitting and receiving module and router；
The sensor, for perceiving and obtaining external environmental information or target information；
The locating module, for obtaining the position and speed information of high dynamic mobile node；
Information storage and processing equipment, for external environmental information or target information and node position and speed
Degree information is stored and processed；
The multi-frequency radio transmitting and receiving module, for receiving in control when can directly be communicated with control centre
The heart send instruction or by the information store and processing equipment in data be sent to control centre；When cannot directly with control
When center to center communications processed, by router, communicated in a multi-hop fashion with other nodes, thus by can directly with control
The node of center to center communications, realization are interacted with the instruction and data between control centre；
The router, for carrying out Path selection, data forwarding and stream when with network others internodal data intercommunication
Amount control, the interconnection being also used between present networks and other heterogeneous networks.
As a kind of improvement of the above method, the transport layer protocol of the Configuration network includes: the specific protocol class of configuration
Type, data transmission rate, data sender's formula and packet size；The protocol type is udp protocol, and the packet size is small
In 1472byte, data sender's formula uses Constant Bit mode.
As a kind of improvement of the above method, the physical layer protocol of the Configuration network comprises determining that the network of node connects
Enter mode, determine node between wirelessly communicate error control method, determine the modulation system/modulation rate wirelessly communicated between node
And sub-carrier number；The network access mode of the node uses ad hoc access way, the mistake wirelessly communicated between the node
Control mode is retransmitted using automatic feedback.
As a kind of improvement of the above method, the physical layer and/or mac-layer protocol are configured as IEEE 802.11g's
Protocol of wireless local area network.
As a kind of improvement of the above method, the security protocol of the physical layer and/or MAC layer is configured as WAPI association
View.
As a kind of improvement of the above method, the network performance includes packet transfer rate, network throughput, average end-to-end
Time delay and average jitter；
The packet transfer rate is all number of data packets that purpose node receives and all data packets that source node is sent
The ratio of number；
The network throughput is the byte number for the data packet that all purposes node receives in network in the unit time；
The average end-to-end time delay is data packet the average time used in the source node to destination node whole process；
Include all delays being likely to occur in entire route finding process: the queueing delay of interface, MAC layer retransmission delay,
Propagation and transfer lag；
The average jitter is the time change between current data packet and follow-up data packet reach, by network congestion, when
Between drift about or routing variation cause.
As a kind of improvement of the above method, the task type includes: to scout cruise, geological prospecting, scientific investigation, ring
Border detection, target search, disaster relief, relayed communications and target tracking.
As a kind of improvement of the above method, the data traffic types are as follows: text, image or video, each type number
Requirement according to the transmission quality of business is different.
Compared with the prior art, the present invention has the following advantages:
1, the present invention is fast for node motion speed and the frequent high dynamic mobile ad-hoc network of change in topology, synthesis are examined
The influence of node mobility and move mode for network performance is considered, for each level of mobile ad-hoc network, has all set
Meter has selected the specific agreement under suitable high dynamic environment, and devises a mobile ad-hoc network network-building method based on this；
2, mobile ad-hoc network interior joint different task scene of the invention of combining closely, according to different scenes interior joint
Different move mode models uses different Routing Protocols, and Routing Protocol is made to be more suitable node motion mode；
3, network-building method proposed by the invention has fully considered the mobility difference that node causes by task attribute difference
Influence for performance of route protocol selects Routing Protocol adaptable therewith, according to different node motion modes with effective
Ensure network performance；
4, solution proposed by the present invention is suitable for the high dynamic mobile ad-hoc network of multitask scene and needs straight
Connect the wireless communication in the communication of quick message exchange, such as scientific investigation, disaster relief, business and military activity, such as
In unmanned plane (UAV) group net, aircraft is from the middle and high dynamic mobile sensor network of self-organizing network and in robot network
Deng.
Detailed description of the invention
Fig. 1 is the flow chart of network-building method of the invention；
Fig. 2 is network layer and protocol stack structure of the invention；
Fig. 3 is influence pair of the different data rate to network packet transmission rate after the method according to the invention networking in embodiment
Than；
Fig. 4 is influence comparison of the different data rate to network throughput after the method according to the invention networking in embodiment；
Fig. 5 is that different data rate is averaged the shadow of end-to-end delay to network after the method according to the invention networking in embodiment
Ring comparison；
Fig. 6 is influence pair of the different data rate to network average jitter after the method according to the invention networking in embodiment
Than；
Fig. 7 is influence of the different data packet size to network packet transmission rate after the method according to the invention networking in embodiment
Comparison；
According to influence pair of the different data packet size to network throughput after this method networking of the invention in Fig. 8 embodiment
Than；
It is averaged end-to-end delay shadow by different data packet size after this method networking of the invention to network in Fig. 9 embodiment
Ring comparison；
In Figure 10 embodiment after the method according to the invention networking different data packet size on network average jitter influence pair
Than；
Different interstitial contents influence to compare on network packet transmission rate after the method according to the invention networking in Figure 11 embodiment；
Different interstitial contents influence to compare on network throughput after the method according to the invention networking in Figure 12 embodiment；
Different interstitial contents are averaged end-to-end delay shadow to network after the method according to the invention networking in Figure 13 embodiment
Ring comparison；
The method according to the invention networking posterior nodal point difference interstitial content influences network average jitter in Figure 14 embodiment
Comparison；
Network packet transmission rate compares in different task scene after the method according to the invention networking in Figure 15 embodiment；
Network throughput compares in different task scene after the method according to the invention networking in Figure 16 embodiment；
Network is averaged end-to-end delay pair in different task scene after the method according to the invention networking in Figure 17 embodiment
Than；
Network average jitter compares in different task scene after the method according to the invention networking in Figure 18 embodiment.
Specific embodiment
The present invention is described in detail With reference to embodiment.
The invention discloses one kind to be used for highly dynamic radio mobile ad-hoc network Networking Design scheme.It is moved according to high dynamic
The characteristics of dynamic self-organizing network, the program include different network application scene demands, different node motion mode demand, no
Data service QoS requirement together, different performance indicator demands etc..The program uses top down design method, if
A kind of network-building method of high dynamic mobile ad-hoc network, including hierarchical structure, basic framework and basic communication protocol are counted
Stack, including transport layer protocol, network layer protocol and physical layer/MAC layer agreement.Self-organizing designed by the present invention
Network structure is simple, well arranged, perfect in shape and function, overcomes the shortcomings that existing invention is suitable only for low speed self-organizing network, make from
Tissue network preferably adapt to high dynamic change in topology demand and a variety of different application scenarios.The simulation experiment result shows
Meet substantially medical demand using the high dynamic self-organizing network of the networking mode, realizes simple, transmission reliability height, time delay
It is low.
As shown in Figure 1, a kind of high dynamic mobile ad-hoc network network-building method, comprising the following steps:
Step 1) determines network size.
Network be it is middle-size and small-size, using planar configuration.Each node status equality in network；The major function of node is perception
Sensing results are simultaneously reached control centre by gateway node by external environment；Each node is likely to become gateway node, node
Or become gateway node, or become standby gateway node；Only gateway node can be interacted with ground control centre；
Step 2) determines the equipment that node includes.
Each node is furnished with a plurality of types of sensors in network, can complete environment sensing task；Each node is furnished with
Router and gateway can independently complete Route Selection；Each node is equipped with multi-frequency radio transmitter-receiver device, to guarantee
The data interaction of inter-node communication and node and control centre；Each node is furnished with geographical location auxiliary device, to facilitate node
Geographical location information is obtained in time.
The clear node tasks scene of step 3) and move mode.
According to the difference of the taken sensing equipment of node, the node in mobile ad-hoc network needs to complete different types of
Business, main includes scouting cruise, geological prospecting, scientific investigation, environment detection, target search, disaster relief, relayed communications, mesh
The contents such as mark tracking.The features of movement of every kind of task lower node is all that tasks/goals drive-type is mobile.
Step 4) determines data service QoS requirement and network performance demand of the node under each task scene.It is right
In the business datum of the different types such as text, image, video and different data amount, transmission quality requirements are different.
Step 5) configures transport layer protocol.The transport layer protocol of network will can satisfy high dynamic mobile ad-hoc network
The specific demand of own characteristic and node mobility.
Step 6) Configuration network layer protocol.The routing that network layer protocol solves when node carries out data transmission in a network is asked
Topic.
Step 7) configuration data link layer and physical layer protocol.
Network topology change is rapid when node high-speed mobile, and certain safe distance should be kept between node.Data link layer
In Error Control agreement purpose be guarantee data transmission accuracy；Medium access control protocol in data link layer
Purpose is to can guarantee that node avoids concealed terminal/exposed terminal problem in communication.Physical layer protocol guarantees that node can will perceive
To information high efficient coding and smoothly transmitted in wireless channel.
Step 8) Configuration network security protocol.
Network structure follows five layer architecture of Ad hoc network, i.e. application layer, transport layer, network layer, data link layer
And physical layer.As shown in Figure 2.
Mobile node in network configures different types of sensor device according to the difference of specific tasks.
Node tasks scene can be classified as several classes: 1. search is scouted.This generic task include complete region overlay formula search/
Scout strike/exploration/environmental monitoring etc..In this generic task scene, node is based on individual movement, with relative constant speed
It is moved back and forth inside region.2. cruise.This generic task mainly includes tour/exploration/monitoring/rescue to static target
Deng.In this generic task scene, node based on group movement, fix by constant airspeed, target.3. target tracking.This generic task
It mainly include that criminal chases/car tracing/wild animal tracking/rescue at sea etc..In this generic task scene, node mainly with
Group movement mode is mobile, tracks target, node speed variation, target movement.
Data traffic quality demand and network performance demand under each task scene refer to that node is completed at such
Data volume and data quality requirement when business.
Transport network layer agreement includes specific transport layer protocol, data transmission rate, data sender's formula and data packet ruler
The contents such as very little.Transport layer protocol selects udp protocol, and packet size is less than 1472byte, data Constant Bit mode
(Constant Bit Rate, CBR) transmission.
The Routing Protocol of network must be adapted with the node motion mode of node tasks scene requirement, and be able to satisfy internetworking
It can require.The present invention is complete with random waypoint mobility model (Random Waypoint Mobility Model, RWP) analog node
Generic task is scouted at search, mobile node routes (Ad hoc using the on-demand distance vector of self-organizing network under the mobile context
On-demand distance vector routing, AODV) agreement；With Reference point group mobility model (RPGM,
Reference Point Group Mobility Model) (group number g=5) analog node completion cruise task, at this
Mobile node uses AODV Routing Protocol under mobile context；With tracing model (Pursue Mobility Model) analog node
Target tracking generic task is completed, mobile node uses destination sequence distance vector route under the mobile context
(Destination-Sequenced Distance-Vector Routing, DSDV) agreement.
Access way of the ad hoc mode competition-based as node, mistake are used in the data link layer protocol of network
Control mode is by the way of automatic feedback re-transmission.
The physical layer protocol of network is it needs to be determined that transmit modulation system, modulation rate and the number of subcarriers of signal.It selects
The protocol of wireless local area network of IEEE 802.11g.IEEE 802.11g agreement back compatible IEEE 802.11a and
IEEE802.11b agreement, node work use the modulation methods of OFDM or DSSS according to channel situation in 2.4GHz or 5GHz frequency
Formula.
Preferably, the security protocol of physical layer and MAC layer uses WAPI agreement.
Node ad hoc mode access process of the step 9) according to mac-layer protocol, node are entered using mode competition-based
Net uses RTS/CTS technology and solves the problems, such as concealed terminal and exposed terminal.
When having except node motion to all node-node transmission ranges of network, it is regarded as leaving the network.
Example:
Interstitial content is 50, and mobile node operates in the square region of 2000m*2000m.The rate travel of node is set
Greater than 340 meter per seconds, to simulate realistically the movement of node high dynamic.The transmission range being arranged between node in this example is 200
Rice.
The move mode of node is divided into 3 kinds according to the difference of task type: random waypoint mobility model is used to analog node
Move mode when generic task is scouted in search is executed, Reference point group mobility model is used to analog node execution cruise class and appoints
Move mode when business chases move mode of the model for analog node performance objective tracking generic task when.
To simulate more true situation of movement, it is 0 second that dead time of the node in random waypoint mobility model, which is arranged,
I.e. after node a period of time mobile towards certain direction with certain rate, does not stop, it is dynamic to randomly choose the subsequent reforwarding in direction.
Setting about physical layer and MAC layer.Mac-layer protocol selects IEEE 802.11g.
Influence problem about different data rate in the present invention to network performance, Fig. 3, Fig. 4, Fig. 5, Fig. 6 are respectively illustrated
Data transmission rate in network be respectively 2kbps, 8kbps, 16kbps, 32kbps, 64kbps, 128kbps, 256kbps,
When 512kbps, 1Mbps, 2Mbps and 4Mbps, node motion speed be respectively 50m/s, 100m/s, 200m/s, 500m/s,
The value and its change of network packet transmission rate, network throughput, average end-to-end time delay and average jitter when 800m/s and 1000m/s
Change situation.Mobility model is by taking RWP as an example, and Routing Protocol is by taking AODV as an example, packet size 1024bytes.
Influence problem about different data packet size in the present invention to network performance, Fig. 7, Fig. 8, Fig. 9, Figure 10 are shown respectively
When having shown that the packet size in network is respectively 512bytes, 1024bytes, 1470bytes, 4096bytes, node motion
Network packet transmission rate when speed is respectively 50m/s, 100m/s, 200m/s, 500m/s, 800m/s and 1000m/s, network throughput
The value and its situation of change of amount, average end-to-end time delay and average jitter.Mobility model is by taking RWP as an example, and Routing Protocol is with AODV
For, data transmission rate 2Mbps.
The problem of interstitial content can be accommodated about the present invention, Figure 11, Figure 12, Figure 13 and Figure 14 are respectively illustrated in network
When interstitial content is respectively 10,20,50,100 and 200, when node motion speed is respectively 50m/s, 500m/s and 1000m/s
Packet transfer rate, network throughput, average end-to-end time delay and average jitter network performance.Mobility model is by taking RWP as an example, routing
Agreement is by taking AODV as an example.
Figure 15, Figure 16, Figure 17 and Figure 18 respectively illustrate network packet transmission rate, network throughput in several different application scenes
The performance comparison of amount, average end-to-end time delay and average jitter.
It should be noted last that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting.Although ginseng
It is described the invention in detail according to embodiment, those skilled in the art should understand that, to technical side of the invention
Case is modified or replaced equivalently, and without departure from the spirit and scope of technical solution of the present invention, should all be covered in the present invention
Scope of the claims in.
Claims (10)
1. a kind of highly dynamic radio mobile ad hoc networking method, which comprises
Select several high dynamic mobile nodes according to the network of five coating systems of Ad hoc composition planar configuration；
Transport layer protocol, network layer protocol, MAC layer and/or the physical layer protocol of Configuration network and the safety association of whole network
View, makes the network performance of network meet data service QoS requirement and mission requirements.
2. highly dynamic radio mobile ad hoc networking method according to claim 1, which is characterized in that the high dynamic is moved
The sum of dynamic node is no more than 256.
3. highly dynamic radio mobile ad hoc networking method according to claim 1 or 2, which is characterized in that described high dynamic
Configured on state mobile node: sensor, locating module, information storage and processing equipment, multi-frequency radio transmitting and receiving module and
Router；
The sensor, for perceiving and obtaining external environmental information or target information；
The locating module, for obtaining the position and speed information of high dynamic mobile node；
The information storage and processing equipment, for the position and speed letter to external environmental information or target information and node
Breath is stored and processed；
The multi-frequency radio transmitting and receiving module, for when can directly communicate with control centre, receiving control centre's hair
The instruction sent or by the information store and processing equipment in data be sent to control centre；When cannot be directly and in control
It when the heart communicates, by router, is communicated in a multi-hop fashion with other nodes, thus by can directly and control centre
The node of communication, realization are interacted with the instruction and data between control centre；
The router, for carrying out Path selection, data forwarding and flow control when with network others internodal data intercommunication
System, the interconnection being also used between present networks and other heterogeneous networks.
4. highly dynamic radio mobile ad hoc networking method according to claim 1 or 2, which is characterized in that the configuration
The transport layer protocol of network includes: the specific protocol type of configuration, data transmission rate, data sender's formula and packet size；
The protocol type is udp protocol, and the packet size is less than 1472byte, and data sender's formula uses Constant Bit
Mode.
5. highly dynamic radio mobile ad hoc networking method according to claim 1 or 2, which is characterized in that the configuration
The physical layer protocol of network comprise determining that the network access mode of node, determine the error control method wirelessly communicated between node,
Determine the modulation system/modulation rate wirelessly communicated between node and sub-carrier number；The network access mode of the node uses ad
Hoc access way, the error control method wirelessly communicated between the node are retransmitted using automatic feedback.
6. highly dynamic radio mobile ad-hoc network networking according to claim 5, which is characterized in that the physical layer
And/or mac-layer protocol is configured as the protocol of wireless local area network of IEEE 802.11g.
7. highly dynamic radio mobile ad-hoc network networking according to claim 6, which is characterized in that the physical layer
And/or the security protocol of MAC layer is configured as WAPI agreement.
8. highly dynamic radio mobile ad-hoc network networking according to claim 1, which is characterized in that the network performance
Including packet transfer rate, network throughput, average end-to-end time delay and average jitter；
The packet transfer rate is all number of data packets that purpose node receives and all number of data packets that source node is sent
Ratio；
The network throughput is the byte number for the data packet that all purposes node receives in network in the unit time；
The average end-to-end time delay is data packet the average time used in the source node to destination node whole process；Include
All delays being likely to occur in entire route finding process: the queueing delay of interface, the retransmission delay of MAC layer, propagation
And transfer lag；
The average jitter is the time change between current data packet and the arrival of follow-up data packet, is floated by network congestion, time
It moves or routing variation causes.
9. highly dynamic radio mobile ad hoc networking method according to claim 1 or 2, which is characterized in that the task
Type includes: to scout cruise, geological prospecting, scientific investigation, environment detection, target search, disaster relief, relayed communications and target
Tracking.
10. highly dynamic radio mobile ad hoc networking system according to claim 1 or 2, which is characterized in that the data
Type of service are as follows: the requirement of text, image or video, the transmission quality of each type data service is different.
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