CN107222904A - The low time delay transmission method forwarded in car networking communication based on key vehicle - Google Patents
The low time delay transmission method forwarded in car networking communication based on key vehicle Download PDFInfo
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- CN107222904A CN107222904A CN201710500971.6A CN201710500971A CN107222904A CN 107222904 A CN107222904 A CN 107222904A CN 201710500971 A CN201710500971 A CN 201710500971A CN 107222904 A CN107222904 A CN 107222904A
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- vehicle
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/04—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources
- H04W40/08—Communication route or path selection, e.g. power-based or shortest path routing based on wireless node resources based on transmission power
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/14—Backbone network devices
-
- 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
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
The present invention relates to the low time delay transmission method forwarded in a kind of communication of car networking based on key vehicle, applied to V2V (vehicle to vehicle) communication scenes under highway environment, this method is when a certain vehicle receiver is to new events message, the new events message is forwarded to all Adjacent vehicles in the range of efficient communication, simultaneously according to the communication capacity value of each Adjacent vehicles, choose and activate the Adjacent vehicles of current communication capabilities value highest one as key vehicle, other Adjacent vehicles are common vehicle, only key vehicle forwards the new events message, common vehicle only receives the new events message.Compared with prior art, the present invention forwards message to reduce forward node by key vehicle, so as to reduce Forwarding Delay, realizes that low time delay communicates.
Description
Technical field
The present invention relates to wireless communication field, and in particular to the transmission plan under cordless communication network, more particularly, to one
Plant the low time delay transmission method forwarded in car networking communication based on key vehicle.
Background technology
With the fast development of social economy, traffic safety problem becomes increasingly conspicuous.In face of the traffic accident taken place frequently, adopt
The space for reducing road traffic accident with conventional methods such as lifting traffic infrastructure quality, reinforcement traffic safety education is more next
It is more limited, with the development of ICT, people is strengthened by the communication between vehicle and vehicle, vehicle and infrastructure
Judgement to vehicle-periphery, when detecting road hazard situation and occurring, timely early warning is provided to driver, to keep away
Exempting from Traffic Collision turns into the study hotspot of current research institution and enterprise both at home and abroad, and this technology is referred to as V2X car networkings by people.
V2X car networkings are to realize one of important communication technology of intelligent transportation.Because car networking communication environment is complicated, traffic density is big,
And the characteristic of channel is very fast with time and spatial variations, it is easy to cause information drop-out and larger communication delay, be unfavorable for very much
Driver obtains surrounding road information and the traffic accident being likely to occur in time.Therefore V2X car networkings are proposed to time delay
Strict requirements, it is desirable to which emergency message can be sent out from information source punishment as soon as possible, remind driver to make timely strain.
It is main to consider to optimize and end-to-end from frame structure design, access process at present in the research of V2X low time delay technologies
Reduce air interface transmission time delay, access delay and end-to-end time delay respectively in terms of communication process simplification.End-to-end communication time delay
With intermediate node hop count and often jump time delay relevant, and vehicle Network Communication Environmental Communication density is larger, message need by
Substantial amounts of forwarding can just successfully arrive at Xinsu, not only result in that time delay is excessive, and can cause a large amount of unnecessary communication overheads.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide in a kind of communication of car networking
The low time delay transmission method forwarded based on key vehicle, reduces forward node, so as to realize the purpose of reduction end-to-end time delay.
The purpose of the present invention can be achieved through the following technical solutions：
The low time delay transmission method forwarded in a kind of car networking communication based on key vehicle, applied under highway environment
V2V communication scenes, this method is when a certain vehicle receiver is to new events message, to all adjacent cars in the range of efficient communication
The new events message is forwarded, while according to the communication capacity value of each Adjacent vehicles, choosing and activating current communication capabilities value most
A high Adjacent vehicles are as key vehicle, and other Adjacent vehicles are common vehicle, and only key vehicle forwards the new events to disappear
Breath, common vehicle only receives the new events message.
Each vehicle periodically sends hello messages to Adjacent vehicles, is exchanged with each other more new state information and communication capacity
Value.
The status information includes position, speed, transmission power and antenna height.
Factor of the calculating based on had an impact transfer capability of the communication capacity value.
An Adjacent vehicles are being activated as key vehicle and the new events message are being sent to the key vehicle, according to reception
To the feedback message of the key vehicle judge whether the key vehicle is failure node, if so, then reselecting and activating
The Adjacent vehicles that current communication capabilities value is number two are as key vehicle, and the rest may be inferred, until forwarding successfully.
The efficient communication scope is set according to road conditions and traffic density.
Compared with prior art, the invention has the advantages that：
(1) present invention calculates communication capacity value (CV) for each Adjacent vehicles within V2V communication ranges, sets up phase
The ability value table answered, source node vehicle select in its location ability value highest node as unique forward node to this
Data are forwarded outside scope, substantial amounts of forwarding can be saved, so as to realize each one forward node in communication range region, significantly
Reduce hop count, realize the end-to-end communication of low time delay；
(2) present invention monitors the reception state of the forward node by message feedback, if reception failure, directly judges
The forward node fails, and then the high vehicle of activation capability value second forwards data as unique forward node, when realizing low
While prolonging, it can guarantee that message by reliable reception.
Brief description of the drawings
Fig. 1 is that V2V communication backbones vehicle of the present invention forwards schematic diagram of a scenario；
Fig. 2 is V2V communication informations forwarding process schematic diagram of the present invention.
Embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.The present embodiment is with technical solution of the present invention
Premised on implemented, give detailed embodiment and specific operating process, but protection scope of the present invention is not limited to
Following embodiments.
The present invention provides the low time delay transmission method forwarded in a kind of car networking communication based on key vehicle, passes through key car
Forwarding message reduces forward node, so as to reduce Forwarding Delay, realizes that low time delay communicates.
1. communication scenes
The low time delay communication plan model of place based on the forwarding of key vehicle that this programme is proposed is as shown in Figure 1.Consider high
The fast equidirectional two-way traffic V2V communication scenes of highway, each vehicle configuration being in during V2V communicates has OBU (On-Board
Unit wave point), and on each OBU is fitted with, is that vehicle sets efficient communication according to road conditions and traffic density
Scope (R), the communication range can flexibly be set.In addition, each car being in communication range can by GPS and digitally
Figure obtains position and the distance of Adjacent vehicles node.
Vehicle in V2V communication scenes periodically sends hello messages, be exchanged with each other position, speed, transmission power with
And the status information such as antenna height, each car considers the various status informations of influence vehicle transfer capability, according to certain
Rule calculates the communication capacity value for obtaining Adjacent vehicles, and is updated when hello messages next time are exchanged.
S is information source vehicle, and F1, F2 are the forward-path between key vehicle B, and V is common vehicle.
2. message forwarding process
For the message forwarding process in communication scenes, detailed description given below.Before forwarding, S passes through week first
The hello messages of phase property can know the status information such as speed, antenna height of all Adjacent vehicles within its communication range R, and
The various factors (can flexibly set) for considering had an impact transfer capability according to certain rule, which is calculated, obtains all adjacent
The communication capacity value (CV) of vehicle, the communication capacity value can use the consolidated statements such as channel capacity, bandwidth, reception and transmission power
Show, and set up corresponding ability value table.By the comparison to ability value, S can know ability value highest car in its location
Be F1, i.e., backbone vehicle.As shown in Fig. 2 after S has found emergency, message forwarding step is as follows：
Step 1：Once S has found emergency, an emergency message (EM) is just produced, and be distributed to all adjacent cars
.
Step 2：S is determined according to current power table to the ability value of each car, if the vehicle capability value is maximum,
The vehicle is activated by as key vehicle, F1 in such as Fig. 1.Conversely, then judging the vehicle as common vehicle, only receive information source and send
Message and without forwarding.
Step 3：F1 is received after emergency message and active information, just returns a feedback information to information source immediately
(ACK/NACK)。
Step 4：S is received after feedback information, and feedback information is decision making, if feedback information be ACK, represent F1 into
Work(receives EM, then just reselection forward node does not forward message to S.If feedback information is NACK, represent that F1 connects not successfully
EM is received, S decides that F1 fails.
Step 5：After F1 failures, S reselects key vehicle according to step 1,2,3 from remaining vehicle and forwards message.
Step 6：Key vehicle successfully as unique forward node forward message after, just as new information source node weight
Multiple above step selection F2 continues distally to forward message, until message reaches all vehicles.
Preferred embodiment of the invention described in detail above.It should be appreciated that one of ordinary skill in the art without
Need creative work just can make many modifications and variations according to the design of the present invention.Therefore, all technologies in the art
Personnel are available by logical analysis, reasoning, or a limited experiment on the basis of existing technology under this invention's idea
Technical scheme, all should be in the protection domain being defined in the patent claims.
Claims (6)
1. the low time delay transmission method forwarded in a kind of car networking communication based on key vehicle, applied under highway environment
V2V communication scenes, it is characterised in that this method is when a certain vehicle receiver is to new events message, in the range of efficient communication
All Adjacent vehicles forward the new events message, while according to the communication capacity value of each Adjacent vehicles, choosing and activating current logical
The Adjacent vehicles of ability value highest one are believed as key vehicle, other Adjacent vehicles are common vehicle, only key vehicle forwarding institute
New events message is stated, common vehicle only receives the new events message.
2. the low time delay transmission method forwarded in car networking communication according to claim 1 based on key vehicle, its feature
It is, each vehicle periodically sends hello messages to Adjacent vehicles, is exchanged with each other more new state information and communication capacity value.
3. the low time delay transmission method forwarded in car networking communication according to claim 2 based on key vehicle, its feature
It is, the status information includes position, speed, transmission power and antenna height.
4. the low time delay transmission method forwarded in car networking communication according to claim 1 or 2 based on key vehicle, it is special
Levy and be, factor of the calculating based on had an impact transfer capability of the communication capacity value.
5. the low time delay transmission method forwarded in car networking communication according to claim 1 based on key vehicle, its feature
It is, is activating an Adjacent vehicles as key vehicle and sending the new events message to the key vehicle, according to receives
The feedback message of the key vehicle judge whether the key vehicle is failure node, work as if so, then reselecting and activating
The Adjacent vehicles that preceding communication capacity value is number two are as key vehicle, and the rest may be inferred, until forwarding successfully.
6. the low time delay transmission method forwarded in car networking communication according to claim 1 based on key vehicle, its feature
It is, the efficient communication scope is set according to road conditions and traffic density.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710500971.6A CN107222904A (en) | 2017-06-27 | 2017-06-27 | The low time delay transmission method forwarded in car networking communication based on key vehicle |
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| CN201710500971.6A CN107222904A (en) | 2017-06-27 | 2017-06-27 | The low time delay transmission method forwarded in car networking communication based on key vehicle |
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| CN110395256A (en) * | 2018-04-24 | 2019-11-01 | 比亚迪股份有限公司 | A kind of control method for vehicle, system and vehicle |
| CN111417081A (en) * | 2020-03-30 | 2020-07-14 | 清华大学 | Reliable broadcasting method for mixed traffic system with formation as center |
| WO2021129549A1 (en) * | 2019-12-26 | 2021-07-01 | 索尼集团公司 | Electronic device, radio communication method, and computer-readable storage medium |
| CN114363831A (en) * | 2021-12-02 | 2022-04-15 | 北京万集科技股份有限公司 | Method, apparatus and computer-readable storage medium for transmitting V2X message |
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| CN110395256A (en) * | 2018-04-24 | 2019-11-01 | 比亚迪股份有限公司 | A kind of control method for vehicle, system and vehicle |
| WO2021129549A1 (en) * | 2019-12-26 | 2021-07-01 | 索尼集团公司 | Electronic device, radio communication method, and computer-readable storage medium |
| CN111417081A (en) * | 2020-03-30 | 2020-07-14 | 清华大学 | Reliable broadcasting method for mixed traffic system with formation as center |
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| CN114363831A (en) * | 2021-12-02 | 2022-04-15 | 北京万集科技股份有限公司 | Method, apparatus and computer-readable storage medium for transmitting V2X message |
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Application publication date: 20170929 |
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