CN109560888B - Node Events information broadcast method based on direction strobe utility - Google Patents
Node Events information broadcast method based on direction strobe utility Download PDFInfo
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- CN109560888B CN109560888B CN201811565524.XA CN201811565524A CN109560888B CN 109560888 B CN109560888 B CN 109560888B CN 201811565524 A CN201811565524 A CN 201811565524A CN 109560888 B CN109560888 B CN 109560888B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/59—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for emergency or urgency
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/53—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers
- H04H20/61—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast
- H04H20/62—Arrangements specially adapted for specific applications, e.g. for traffic information or for mobile receivers for local area broadcast, e.g. instore broadcast for transportation systems, e.g. in vehicles
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04H—BROADCAST COMMUNICATION
- H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
- H04H20/65—Arrangements characterised by transmission systems for broadcast
- H04H20/71—Wireless systems
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Abstract
A kind of Node Events information broadcast method based on direction strobe utility, each node has array dual-mode antenna, wireless signal processing and storage platform in the autonomous network in broadband；Each node sends broadcast message using collision avoidance mechanism；The node for receiving broadcast message is located at the signal of joint movements emergent node using the directionality strobe utility filtering based on array antenna；The node for receiving broadcast message judges whether to terminate current demand signal forwarding based on the strobe utility of information timeliness；The node for receiving broadcast message utilizes wheel number strobe utility forwarding broadcast message.The present invention is based on direction, timeliness and the signal strobe utilities for taking turns number, realize nodal information orderly back-propagating in the ad-hoc network of broadband, it realizes and breaks down in network or the failure of the node of security incident or accident information efficient real-time release in a network, effective Network Situation and environmental warning information are provided for subsequent node, reduces node contingency occurrence probability.
Description
Technical field
The present invention relates to the wireless signal processing technology fields in the ad hoc network of broadband, more particularly to a kind of direction that is based on to filter
The Node Events information broadcast method of mechanism.
Background technique
With information technology fast development, more and more sensors and communication equipment are effectively integrated in various information
In system.Pass through communication equipment networking, the collected corresponding letter of sensor on each middle terminal device between various terminal equipment
Breath is realized in network system by the communication equipment in terminal and is issued.
If more and more sensors and communication equipment are integrated in vehicle, unmanned plane, aircraft and road information system,
Traffic intelligence, unmanned trend increasingly show.Simultaneously, car ownership increase sharply so that traffic safety problem increasingly
It is prominent.Statistics indicate that there are the traffic accident for being related to casualties 200,000 of record in China in 2012, cause about 60,000 people it is dead,
220000 people are injured, and about 1,200,000,000 yuan of direct property loss.According to analysis, in above-mentioned traffic accident, 70% or more is due to driver
Reaction is not in time, mishandling caused.Some researches show that, as vehicle node or driver can understand in time surrounding traffic and
Traveling state of vehicle, and early warning is obtained before traffic accident occurs, so that it may reduce at least 40% traffic accident.Therefore, it is
Subsequent driving vehicle provides real-time warning information, especially complicated in the meteorological conditions such as rain, mist, snow, night and mountain area, tunnel etc.
Car accident warning information under road environment is the effective act for reducing traffic accident incidence.
Traditional warning information on Che Liang unmanned plane mainly by installing anticollision radar or disposing largely on road
Detection device obtains, there are self information can not with other vehicles unmanned plane nodes sharing or information time delay is issued in road network
Big problem.
With the rise of car networking, broadband ad hoc network concept, V2I (Vehicle to is constructed using road equipment
Infrastructure) network can reduce warning information propagation delay time, but the covering of road equipment system-wide net is at high cost；Based on width
Vehicle-to-vehicle, machine-to-machine network with technologies such as ad hoc network, global positioning systems, can reduce the requirement to infrastructure, but be
Limited performance unite in Locating System Accuracy and signal integrity, and nodal information spreads unchecked and be easy to cause channel congestion, leads to key
Information can not be issued in time.
It is similar with the transportation networks such as car networking mentioned above, broadband ad hoc network, information network is formed in other terminals
In, each terminal equally exists nodal information and spreads unchecked and be easy to cause channel congestion as the node in information network, leads to node
Event information can not be issued in time.
Therefore network autonomous for broadband designs a kind of effective Node Events information broadcast method and needs.
Summary of the invention
In view of the defects existing in the prior art, it is wide to provide a kind of Node Events information based on direction strobe utility by the present invention
Broadcasting method realizes that the temporal information that the node of event occurs in the autonomous network in broadband is efficiently sent out in real time in the autonomous network in broadband
Cloth.
Technical purpose to realize the present invention, using following technical scheme:
Node Events information broadcast method based on direction strobe utility, comprising the following steps:
S1. each node is provided with array dual-mode antenna, wireless signal processing and storage platform in the autonomous network in broadband.Just
Beginningization is based on the array dual-mode antenna of each node, wireless signal processing platform in the autonomous network in broadband and platform is locally stored.Respectively
Node is moved according to node formation, and the consistent node of the direction of motion belongs to identical node formation in the autonomous network in broadband,
Different communications bands is used between different node formations.For any node in node formation, in its movement direction of nodes
Other nodes in front are the forward direction node of the node, other nodes at its node traffic direction rear are the node
Backward node.Each node in network all has unique id information.
Determine the corresponding Case Number of various Node Events, event type and event handling timeliness.
If S2. Node Events occur for certain node, the nodes of Node Events occurs by its id information, Case Number, event class
Frame signal is written in type, Time To Event and event handling timeliness, and by frame lubrication groove count flag position 1, into S3.
S3. the node of broadcast message is needed (node of Node Events generally to occur, Node Events generally refer to node
Failure or safety accident event) it is used as broadcast source node, broadcast source node waits several time slots to listen to public broadcasting letter at random
If common broadcast channel is occupied then transmit queue is added, while starting collision avoidance mechanism in the broadcast message by road, until
The broadcast message be the common broadcast channel free time when node transmit queue in highest priority broadcast message.
S4. current broadcast source node does not receive identical id information such as, similar events are compiled after waiting setting cycle length
Number, wheel count increased broadcast message, then judge that current broadcast information fails transmissions, is again introduced into S3 step, such as reception
Increased broadcast message is counted to wheel, then enters S5；
S5. the non-broadcasting source node for receiving broadcast message carries out frame decoding processing to the broadcast message received, reads hair
The id information, Case Number and wheel count flag of the node of the broadcast message are given, and is reached using the signal of array dual-mode antenna
Angular estimation algorithm judges after coming to the broadcast message received to node or forward direction node, such as judges the broadcast message
To backward node then filter the broadcast message without forwarding, non-broadcasting source node when taking turns number and being 1 by local storage
In the broadcast message delete；As judge broadcast message from it is preceding to node if to pass through the warning device of itself more with sound, light, electricity etc.
Means prompt front Node Events information.
S6. the non-broadcasting source node for receiving broadcast message judges that this is wide using the broadcast mechanism based on information timeliness
It broadcasts whether information fails, without processing if failure, does not fail, carry out S7；
S7. Case Number that the non-broadcasting source node of broadcast message receives is received as not being locally stored, then should
Broadcast message is being locally stored, and if Case Number is in local presence, then wheel count flag information is read, using based on taking turns
Several filtering forwarding mechanisms judges whether to need to be forwarded, and will then carry out S3 operation if you need to forward；
S8. the node that Node Events occur repeats S2~S7 by the setting period.
As the preferred technical solution of the present invention, the collision avoidance mechanism in S3 is the conflict avoidance machine based on random slot
System, when broadcast source node listen to channel it is occupied when, broadcast source node waits several time slots at random, again initiate listen to.
As the preferred technical solution of the present invention, the collision avoidance mechanism in S3 is the conflict avoidance machine based on fixed time slot
System, when broadcast source node listen to channel it is occupied when, broadcast source node according to node ID number wait with ID number mantissa at
The fixation time slot of direct ratio initiates to listen to again.
As the preferred technical solution of the present invention, the transmit queue priority in S3 is according to the time for receiving broadcast message
Successively arranged.
As the preferred technical solution of the present invention, the transmit queue priority in S3 is according to the successive suitable of Time To Event
Sequence is arranged.
As the preferred technical solution of the present invention, the Direction-of-arrival algorithm in S5 is based on uniform circular array antenna
Phase estimation algorithm.
As the preferred technical solution of the present invention, the Direction-of-arrival algorithm in S5 is based on even linear array array antenna
Phase estimation algorithm.
The phase estimation algorithm of uniform circular array antenna and the phase estimation algorithm of even linear array array antenna are this fields
Highly developed known algorithm.
As the preferred technical solution of the present invention, the broadcast mechanism based on information timeliness in S6 is based on finite time
Decision mechanism, after broadcast message is more than the specified time cycle, node no longer forwards the information.
As the preferred technical solution of the present invention, in S6 by the broadcast mechanism of information timeliness be based on limited wheel
Several decision mechanisms, after broadcast message round is more than specified wheel number limitation, node no longer forwards the information.
As the preferred technical solution of the present invention, the filtering forwarding mechanism counted based on wheel in S7 includes:
The non-broadcasting source node that broadcast message is received in S7.1 network obtains the wheel count flag position of current broadcast information
Data；
The non-broadcasting source node that broadcast message is received in S7.2 network reads the same Case Number information being locally stored
Wheel count flag；
The wheel count flag information obtained in S7.1 and S7.2 is compared by S7.3, such as when front-wheel count flag is greater than this
The wheel count flag of ground storage, then do not forward this broadcast message, as when front-wheel count flag is less than or equal to and is locally stored
Count flag is taken turns, then updates the wheel count flag being locally stored, adds 1 to enter subsequent turn the wheel count flag of this broadcast message
Send out process.
Compared with prior art, the present invention can generate following technical effect:
It is flat to have array dual-mode antenna, wireless signal processing and storage for each node in the autonomous network in broadband of the invention
Platform.The present invention makes full use of the array dual-mode antenna of each node itself outfit in network to the recognition capability in wireless signal direction.
Each node utilizes collision avoidance mechanism transmission broadcast message in network simultaneously；The node for receiving broadcast message is used based on array
The directionality strobe utility filtering of antenna is located at the signal of joint movements emergent node；The node for receiving broadcast message is based on letter
The strobe utility of breath timeliness judges whether to terminate current demand signal forwarding；The node for receiving broadcast message utilizes wheel number filter
System forwarding broadcast message.
The present invention is based on direction, timeliness and the signal strobe utilities for taking turns number, realize nodal information in the ad-hoc network of broadband
Orderly back-propagating, reduces the congestion situation of broadcast message in a network, realizes and breaks down in network or security incident
Node failure or accident information efficient real-time release in a network, provide effective Network Situation and environment for subsequent node
Warning information.As the method for the present invention apply in Traffic Net, then can be in the complexity such as bad weather condition or hill path, tunnel
Advanced warning information is provided under road conditions situation for nodes such as unmanned network or drivers, the hair of traffic accident is effectively reduced
Raw probability.
Detailed description of the invention
Fig. 1 show broadcast node diffusion schematic diagram of the invention；
Fig. 2 show the application scenarios schematic diagram of the embodiment of the present invention；
Fig. 3 show the accident information diffusion schematic diagram of the embodiment of the present invention；
Fig. 4 show the broadcast frame form schematic diagram of the embodiment of the present invention.
Fig. 5 show the implementation steps schematic diagram of the embodiment of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
As shown in Figure 1, the invention proposes a kind of Node Events information broadcast methods based on direction strobe utility, every
Screening is filtered to next round broadcast both candidate nodes in wheel broadcast, so that control node event information orderly passes afterwards.
Below by taking the transportation network towards the autonomous network in broadband as an example, illustrate concrete methods of realizing of the invention.
S1. each node is provided with array dual-mode antenna, wireless signal processing and storage platform in transportation network；Initialize base
It the array dual-mode antenna of each node, wireless signal processing platform and is locally stored flat in the transportation network of the autonomous network in broadband
Platform.In transportation network, each node is moved according to node formation, and the consistent node of the direction of motion belongs to phase in transportation network
With node formation, different communications bands is used between different node formations.For any node in node formation, at it
Other nodes in front of movement direction of nodes are the forward direction node of the node, other nodes at its node traffic direction rear
It is the backward node of the node.Each node in transportation network all has unique id information.
Determine the various failures or the corresponding Case Number of traffic safety event, event type and thing in transportation network
Part handles timeliness.
If S2. perhaps traffic safety event breaks down or traffic safety thing certain nodes break down in transportation network
Frame signal is written in its id information, Case Number, event type, Time To Event and event handling timeliness by the node of part,
And by frame lubrication groove count flag position 1, into S3.
S3. need broadcast message break down or the node of traffic safety event is as broadcast source node, broadcast source
Node waits several time slots to listen to common broadcast channel at random, if common broadcast channel is occupied, then the broadcast message is added
Transmit queue, while starting collision avoidance mechanism, until node sends team when the broadcast message is the common broadcast channel free time
The broadcast message of highest priority in column.
S4. current broadcast source node does not receive identical id information such as, similar events are compiled after waiting setting cycle length
Number, wheel count increased broadcast message, then judge that current broadcast information fails transmissions, is again introduced into S3 step, such as reception
Increased broadcast message is counted to wheel, then enters S5；
S5. the non-broadcasting source node that broadcast message is received in transportation network carries out at frame decoding the broadcast message received
Reason reads the id information for sending the node of the broadcast message, Case Number and wheel count flag, and utilizes array dual-mode antenna
Direction-of-arrival algorithm judges that such as judgement should to node or forward direction node after coming to the broadcast message received
Broadcast message come to backward node then filter the broadcast message without forwarding, non-broadcasting source node when take turns number be 1 when will this
The broadcast message is deleted in ground memory；As judge broadcast message from it is preceding to node if pass through the warning device of itself with sound,
More means prompts such as light, electricity front accident information.
S6. the non-broadcasting source node of broadcast message is received in transportation network using the broadcast mechanism based on information timeliness
Judge whether this broadcast message fails, without processing if failure, does not fail, carry out S7；
S7. Case Number that the non-broadcasting source node of broadcast message receives is received in transportation network as do not deposited locally
Storage, then this broadcast message is being locally stored, and if Case Number is in local presence, then reads wheel count flag information, adopts
Judge whether to need to be forwarded with the filtering forwarding mechanism counted based on wheel, will then carry out S3 operation if you need to forward；
S8. it breaks down or the node of traffic safety event is by setting period repetition S2~S7.
Fig. 2 gives one embodiment of the present of invention, includes two node formations and multiple nodes, section in certain transportation network
Point formation 1 uses broadcast channel 1, frequency point 5800MHz, and node formation 2 uses broadcast channel 2, frequency point 5875MHz；Node formation 1
Including 10 nodes, number is respectively A to J, and interior joint A crashes with node B.
Fig. 3 gives the accident information diffusion schematic diagram of the embodiment of the present invention, carries out specifically according to broadcast round below
It is bright.
First round broadcast: when collision accident occur in node A and node B, it is assumed that node A issues fault message alarm, presses
Fault message is subjected to framing according to format shown in Fig. 4.
Node A inserts 0x00 in frame type, and expression present frame is broadcast frame；0x00000001 is inserted in node ID, is
The fixation ID of node A is numbered；Case Number inserts 0x0001, is expressed as the 1st event information broadcast of this node；Event type is filled out
Enter 0x01, indicates to knock into the back；Event time period insert 0x21092000, expression accident occur event be 21 points 20 seconds 09 minute；Broadcast
Round inserts 0x01, indicates the 1st wheel broadcast；The timeliness period inserts 0x04, indicates to go off the air after back-propagation 4 is jumped；Expansion area
Insert full 0.
For node A as broadcast source node, node A listens to common broadcast channel 2 after waiting 2 slot cycles at random, it is assumed that
Common broadcast channel is occupied by node B at this time, and node A is according to the collision avoidance mechanism based on random slot, after waiting 5 time slots
Common broadcast channel 2 is listened to again, and channel is idle at this time, and node A sends event broadcast frame signal on broadcast channel 2.
The node for receiving node A broadcast singal in first round broadcast has tetra- nodes of B, C, D, E, node B, C, D, E
Frame decoding is carried out to the broadcast singal received, the id information, Case Number and wheel for reading sending node (i.e. node A) count mark
Will, tetra- nodes of B, C, D, E, based on phase channel angle-of- arrival estimation algorithm, calculate separately egress using array dual-mode antenna
The directional information of A and this node judge that node A is located at the front of B, C, D, E, therefore B, C, D, E need to carry out broadcast singal
Processing.
Node B, C, D, E are by the warning device of itself with more means prompts such as sound, light, electricity front accident information.
Node B, C, D, E use the timeliness strobe utility based on broadcast wheel technology to judge whether this broadcast message fails,
Broadcast wheel number is 1 at this time, and timeliness number is 4, and for effectively broadcast, node B, C, D, E carry out subsequent processing to signal.
Node B, C, D, E search the event information of local identical ID, do not find that this information then exists in local system
This message is locally stored in each node.Node B, C, D, E listen to common broadcast channel after waiting 3,4,2,5 periods at random respectively
2, common broadcast channel 2 is occupied at this time, and B node waits 8 time slots, C node base based on the collision avoidance mechanism of random slot
5 time slots are waited in the collision avoidance mechanism of random slot, when D node waits 4 based on the collision avoidance mechanism of random slot
Gap, E node wait 7 time slots based on the collision avoidance mechanism of random slot, and each node is received respectively in common broadcast channel 2
Information does not receive the temporal information updated than wheel broadcast, and each node listens to public broadcasting letter by waiting time slot again at this time
Road 2；Node D has found the broadcast wheel that common broadcast channel 2 is idle, then in the broadcast frame issued node A after waiting 4 time slots
Number is changed to 0x02, indicates the 2nd wheel broadcast, and node D sends broadcast message.
Second wheel broadcast: node D carry out second wheel broadcast, receive at this time node D broadcast message node have A, B, C,
E, six nodes of G, F.Six nodes carry out frame decoding to the broadcast singal received, read sending node id information, Case Number
With wheel count flag, A, B, C, E, G, F six nodes using array dual-mode antenna based on phase channel angle-of- arrival estimation algorithm,
The directional information of egress D Yu this node are calculated separately, node A, B, C judge that egress D is located at its rear, due to broadcasting at this time
Broadcast wheel number is 2 in frame, and node B, C do not delete broadcast data；Node E, G, F judge that egress D is located in front of its, therefore E, G,
F needs to handle broadcast singal.
Node E, G, F pass through more means prompts such as sound, light, electricity front accident information.
Node E, G, F use the timeliness strobe utility based on broadcast wheel technology to judge whether this broadcast message fails, this
When broadcast wheel number be 2, timeliness number be 4, for effectively broadcast, after node A receives the signal of node D, judge node A broadcast letter
It number sends successfully, node E, G, F carry out subsequent processing to signal.
Node E, G, F search the event information of local identical ID.Node E sends identical in local node discovery node A
Number event information, and the wheel number information stored in node E is 1, therefore node E is not involved in next round broadcast.Node G, F are at this
Do not find that then this message is locally stored in each node in this information in ground system.Node G, F are random respectively to wait 5 and 3
Time slot listens to channel, at this time channel idle, and the broadcast wheel number in broadcast frame that node A is issued is changed to 0x03 and sends the by F node
Three-wheel broadcast message.
Third round broadcast: node F carries out third round broadcast, and the node for receiving the broadcast message of node F sending at this time has
D, six nodes of E, G, H, I, J.Six nodes to broadcast singal carry out frame decoding, read sending node id information, Case Number and
Count flag is taken turns, six nodes, based on phase channel angle-of- arrival estimation algorithm, are calculated separately out and saved using array dual-mode antenna
The directional information of point F and this node, node D, E judge that egress F is located at its rear, since broadcast wheel number is in broadcast frame at this time
3, node D, E do not delete broadcast data；Node G, H, I, J judge that egress D is located at its front, therefore G, H, I, J are needed to wide
Signal is broadcast to be handled.
Node G, H, I, J pass through more means prompts such as sound, light, electricity front accident information.
Node G, H, I, J use the timeliness strobe utility based on broadcast wheel technology to judge whether this broadcast message fails,
Broadcast wheel number is 3 at this time, and timeliness number is 4, for effectively broadcast, after node D receives the signal of node F, judges that node D is broadcasted
Signal is sent successfully.
Node G, H, I, J search the event information of local identical ID.The phase that node G is sent in local node discovery node A
With number event information, and the wheel number information stored in node G is 2, therefore node G is not involved in next round broadcast.Node H, I, J
Do not find that then this message is locally stored in each node in this information in local system.Node H, I, J are random respectively to be waited
2,7,10 slot cycles listen to channel, at this time channel idle, and H node changes the broadcast wheel number in broadcast frame that node A is issued
Fourth round broadcast message is sent for 0x04.
Fourth round broadcast: node H carries out fourth round broadcast, and the node for receiving the broadcast message of node H sending at this time has
E, five nodes of F, G, J, I.Five nodes carry out frame decoding to broadcast singal, read sending node id information, Case Number and wheel
Count flag calculates separately egress H and this node using array dual-mode antenna based on phase channel angle-of- arrival estimation algorithm
Directional information, node E, G, F judge that egress H is located at its rear, since broadcast wheel number is 4 in broadcast frame at this time, node E,
G, F does not delete broadcast data；Node I, J judge that egress H is located at its front, therefore I, J need to handle broadcast singal.
Node I, J pass through more means prompts such as sound, light, electricity front accident information.
Judge whether this broadcast message fails using the timeliness strobe utility based on broadcast wheel technology, at this time broadcast wheel number
It is 4, it is active broadcast that timeliness number, which is 4, after node F receives the broadcast singal of node H, judges the broadcast letter that node F is issued
It number sends successfully.I, J node no longer forwards broadcast singal.
Fig. 5 gives implementation steps schematic diagram of the invention.
Using array antenna to the recognition capability in wireless signal direction and the direction strobe utility counted based on wheel, node thing
Part information can in the autonomous network in broadband release quickly, have effect spread, to provide enough warning information for subsequent node,
Avoid the high-speed motion node probability that interlock type accident occurs under low view distance environment.
The foregoing is merely a preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. the nodal information broadcasting method based on direction strobe utility, it is characterised in that: the following steps are included:
S1. each node is provided with array dual-mode antenna, wireless signal processing and storage platform in the autonomous network in broadband；Initialization
Based on the array dual-mode antenna of each node, wireless signal processing platform in the autonomous network in broadband and platform is locally stored；Each node
It is moved according to node formation, the consistent node of the direction of motion belongs to identical node formation in the autonomous network in broadband, different
Different communications bands is used between node formation；For any node in node formation, in front of its movement direction of nodes
Other nodes be the node forward direction node, other nodes at its node traffic direction rear be the node it is rear to
Node；Each node in network all has unique id information；
Determine the corresponding Case Number of various Node Events, event type and event handling timeliness；
If S2. Node Events occur for certain node, the nodes of Node Events occurs by its id information, Case Number, event type, thing
Frame signal is written in part time of origin and event handling timeliness, and by frame lubrication groove count flag position 1, into S3；
S3. need the node of broadcast message as broadcast source node, it is public wide that broadcast source node waits several time slots to listen at random
Channel is broadcast, if common broadcast channel is occupied, then transmit queue is added in the broadcast message, while starting collision avoidance mechanism,
Until the broadcast message be the common broadcast channel free time when node transmit queue in highest priority broadcast message；
S4. current broadcast source node wait set cycle length after, such as do not receive identical id information, similar events number,
Wheel counts increased broadcast message, then judges that current broadcast information fails transmission, is again introduced into S3 step, such as receives wheel
Increased broadcast message is counted, then enters S5；
S5. the non-broadcasting source node for receiving broadcast message carries out frame decoding processing to the broadcast message received, reads to send and be somebody's turn to do
Id information, Case Number and the wheel count flag of the node of broadcast message, and estimated using the direction of arrival of array dual-mode antenna
Calculating method judges after coming to the broadcast message received to node or forward direction node, such as judges that the broadcast message comes from
Backward node then filters the broadcast message without forwarding, and non-broadcasting source node is will be in local storage when wheel is counted as 1
The broadcast message is deleted；As judge broadcast message from it is preceding to node if pass through the warning device of itself with sound, light or/and electric shape
Formula prompt front Node Events information；
S6. the non-broadcasting source node for receiving broadcast message judges that this broadcasts letter using the broadcast mechanism based on information timeliness
Whether breath fails, and without processing if failure, does not fail, carries out S7；
S7. receive Case Number that the non-broadcasting source node of broadcast message receives as not being locally stored, then it is this is wide
It broadcasts information be locally stored, if Case Number is in local presence, then wheel count flag information is read, using what is counted based on wheel
Filtering forwarding mechanism judges whether to need to be forwarded, and will then carry out S3 operation if you need to forward；
S8. the node that Node Events occur repeats S2~S7 by the setting period.
2. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S3
Collision avoidance mechanism be the collision avoidance mechanism based on random slot, when broadcast source node listen to channel it is occupied when, broadcast
Source node waits several time slots at random, initiates to listen to again.
3. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S3
Collision avoidance mechanism is the collision avoidance mechanism based on fixed time slot, when broadcast source node listen to channel it is occupied when, broadcast
Source node waits the fixation time slot directly proportional to ID number mantissa according to node ID number, initiates to listen to again.
4. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S3
Transmit queue priority is arranged according to the time order and function for receiving broadcast message.
5. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S3
Transmit queue priority is arranged according to the sequencing of Time To Event.
6. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S5
Direction-of-arrival algorithm is the phase estimation algorithm based on uniform circular array antenna.
7. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S5
Direction-of-arrival algorithm is the phase estimation algorithm based on even linear array array antenna.
8. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S6
Broadcast mechanism based on information timeliness is the decision mechanism based on finite time, when broadcast message is more than the specified time cycle
Afterwards, node no longer forwards the information.
9. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S6
Broadcast mechanism based on information timeliness is the decision mechanism counted based on limited wheel, when broadcast message round is more than specified wheel
After number limitation, node no longer forwards the information.
10. the nodal information broadcasting method according to claim 1 based on direction strobe utility, it is characterised in that: in S7
Based on wheel count filtering forwarding mechanism include:
The non-broadcasting source node that S7.1 receives broadcast message obtains the wheel count flag position data of current broadcast information；
The wheel that the non-broadcasting source node that S7.2 receives broadcast message reads the same Case Number information being locally stored counts mark
Will；
The wheel count flag information obtained in S7.1 and S7.2 is compared by S7.3, such as when front-wheel count flag is greater than local deposit
The wheel count flag of storage, then do not forward this broadcast message, such as when front-wheel count flag is less than or equal to the wheel meter being locally stored
Number mark, then update the wheel count flag being locally stored, and adds 1 to enter subsequent forwarding flow the wheel count flag of this broadcast message
Journey.
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| CN101998334A (en) * | 2009-08-12 | 2011-03-30 | 中兴通讯股份有限公司 | Processing method and device used after completion of alarm information transmitting process |
| CN102833023A (en) * | 2012-08-18 | 2012-12-19 | 湖南德海通信设备制造有限公司 | Ad hoc network wireless intelligent public emergency broadcast terminal |
| CN102026130B (en) * | 2009-09-18 | 2014-04-09 | 中兴通讯股份有限公司 | Method, system and device for notifying emergency area identification |
| CN106658735A (en) * | 2017-01-12 | 2017-05-10 | 西安电子科技大学 | TDMA based long propagation delay wireless link time slot distribution method |
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| US8879604B2 (en) * | 2011-07-06 | 2014-11-04 | Cisco Technology, Inc. | Efficient rendezvous for distributed messages in frequency-hopping communication networks |
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| CN101998334A (en) * | 2009-08-12 | 2011-03-30 | 中兴通讯股份有限公司 | Processing method and device used after completion of alarm information transmitting process |
| CN102026130B (en) * | 2009-09-18 | 2014-04-09 | 中兴通讯股份有限公司 | Method, system and device for notifying emergency area identification |
| CN102833023A (en) * | 2012-08-18 | 2012-12-19 | 湖南德海通信设备制造有限公司 | Ad hoc network wireless intelligent public emergency broadcast terminal |
| CN106658735A (en) * | 2017-01-12 | 2017-05-10 | 西安电子科技大学 | TDMA based long propagation delay wireless link time slot distribution method |
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