CN106211089A - A kind of car networked system, communication means and car-mounted terminal - Google Patents
A kind of car networked system, communication means and car-mounted terminal Download PDFInfo
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- CN106211089A CN106211089A CN201610503090.5A CN201610503090A CN106211089A CN 106211089 A CN106211089 A CN 106211089A CN 201610503090 A CN201610503090 A CN 201610503090A CN 106211089 A CN106211089 A CN 106211089A
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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
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
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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
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Abstract
This application provides a kind of car networked system, communication means and car-mounted terminal, communication means includes: in car networked system, broadcast message is sent to wireless network by some car-mounted terminal in a broadcast manner；In car networked system, other each car-mounted terminals in addition to some car-mounted terminal receive broadcast message from wireless network, and judge whether the broadcast message received is its broadcast message generated；If so, the broadcast message received is abandoned；If it is not, forward the broadcast message received, and the broadcast message received is resolved, obtain receiving data.In this application, by can realize the communication plans such as car and car voice communication with upper type, improve driving path and experience and be easy to traffic department's command and management to road running vehicle.
Description
Technical field
The application relates to intelligent transportation field, particularly to a kind of car networked system, communication means and car-mounted terminal.
Background technology
At intelligent transportation field, the generation of car networking technology makes car become with infrastructure-based communication with people and Che with car, car
May.
Wherein, current car networking technology is concentrated mainly on traffic light signals and the interactive application of vehicle driving safety information
Other communication types such as the voice communication of car and car, car and people and Che and trackside infrastructure are but rarely had and relate to by research, but
Other communication types such as the voice communication of car and car, car and people and Che and trackside infrastructure the most gradually become more important, example
As road traffic command and management personnel wish phonetic order is issued to each passing car in time, management traffic congestion keeps
Road passes unimpeded；On road, the neighbouring vehicle travelled is desired with voice call, even carries out voice friendship with trackside intelligent basis facility
Stream, in order to understand front road conditions in time, promote road driving experience；The fleet travelled on road wishes to carry out at any time speech exchange,
The unified management waiting for command car notifies driving conditions at once, and requires that setting up proprietary communication link ensures information security.
Therefore, for other communication types such as voice communication of car and car, car and people and Che and trackside infrastructure
Demand, need a kind of communication means badly.
Summary of the invention
For solving above-mentioned technical problem, the embodiment of the present application provides a kind of car networked system, communication means and car-mounted terminal,
To reach to realize the communication plans such as car and car voice communication, promote road driving experience and be easy to traffic department to road driving
The purpose of the command and management of vehicle, technical scheme is as follows:
A kind of communication means, is applied to car networked system, and described car networked system includes multiple car-mounted terminal, described in each
Car-mounted terminal is communicated by wireless network, and described method includes:
In described car networked system, broadcast message is sent to institute by some described car-mounted terminal in a broadcast manner
State wireless network；
In described car networked system, other each car-mounted terminals in addition to car-mounted terminal some described are from described wireless
Network receives broadcast message, and judges whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing, and the described broadcast message received is solved
Analysis, obtains receiving data.
Preferably, in described car networked system, broadcast message is sent out by some described car-mounted terminal in a broadcast manner
Deliver to the process of described wireless network, including:
Obtain the voice signal of user's input；
The voice signal inputting described user encodes, and obtains voice data to be sent；
Described voice data to be sent is packaged, obtains described broadcast message；
By the mode of broadcast, described broadcast message is sent to described wireless network；
The broadcast message received is resolved, obtains receiving the process of data, including；
The broadcast message received is resolved, obtains receiving voice data；
Described reception voice data is decoded, obtains receiving voice signal, and play described reception voice signal.
Preferably, in described car networked system other each car-mounted terminals in addition to car-mounted terminal some described from institute
State reception broadcast message in wireless network, and judge whether the broadcast message received is its broadcast generated
The process of message, including:
In described car networked system, other each car-mounted terminals in addition to car-mounted terminal some described judge described nothing
Whether the destination address of the message packet in gauze network is multicast address；
If so, the message packet in described wireless network is received as broadcast message；
Judge that the source address in the broadcast message received is the most identical with the link-local address of itself, described
Link-local address is that the MAC Address to described car-mounted terminal maps obtained address.
Preferably, the process of the broadcast message received described in forwarding, including:
Whether the transmission of the broadcast message received described in judgement jumps limit more than zero；
The most then perform transmission and jump the operation that limit subtracts 1, the value that described transmission is jumped after limit subtracts 1 is assigned to described transmission
Jump limit, and the broadcast message message received described in forwarding；
If it is not, the broadcast message received described in abandoning.
Preferably, when the transmission of the described broadcast message received jumps limit more than zero, receive described in forwarding
The process of broadcast message, including:
Judge that itself is the most forwarded over described according to the message identification number in the described broadcast message received
The broadcast message received；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing.
Preferably, described message identification number is the link-local address of broadcast message sender and described broadcast
Message sender generates the identification number of the serial number composition of broadcast message.
A kind of communication means, some car-mounted terminal being applied in car networked system, described method includes:
Broadcast message, when as transmitting terminal, is sent to described by some described car-mounted terminal in a broadcast manner
Wireless network, so that other each car-mounted terminals in addition to car-mounted terminal some described are from described in described car networked system
Wireless network receives broadcast message；
Some described car-mounted terminal, when as receiving terminal, receives broadcast message from described wireless network, and
Judge whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, and the described broadcast message received is resolved, obtain receive data；
Some described car-mounted terminal, as when forwarding end, receives broadcast message from described wireless network, and
Judge whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing.
A kind of car-mounted terminal, including:
Sending module, in a broadcast manner broadcast message being sent to described wireless network, so that described car
In networked system, other each car-mounted terminals in addition to car-mounted terminal some described receive broadcast from described wireless network
Message packet；
Receiver module, for receiving broadcast message from described wireless network；
First judge module, for judging whether the broadcast message received is its broadcast message generated,
If so, perform discard module abandon described in the broadcast message that receives, if it is not, perform forwarding module forward described in receive
Broadcast message, and perform parsing module the described broadcast message received resolved, obtain receiving data.
A kind of car networked system, including: multiple car-mounted terminals as described above, each described car-mounted terminal is by wireless
Network communicates, wherein:
Some described car-mounted terminal in described car networked system, for sending broadcast message in a broadcast manner
To described wireless network；
Other each car-mounted terminals in addition to car-mounted terminal some described in described car networked system, for from described
Wireless network receives broadcast message, and judges whether the broadcast message received is its broadcast report generated
Literary composition；If so, the broadcast message received described in abandoning；If it is not, the broadcast message received described in Zhuan Faing, and to institute
State the broadcast message received to resolve, obtain receiving data.
Preferably, some described car-mounted terminal includes:
First acquiring unit, for obtaining the voice signal of user's input；
Coding unit, encodes for the voice signal inputting described user, obtains voice data to be sent；
Encapsulation unit, for being packaged described voice data to be sent, obtains described broadcast message；
Resolution unit, for resolving the broadcast message received, obtains receiving voice data；
Decoding unit, for being decoded described reception voice data, obtains receiving voice signal；
Broadcast unit, is used for playing described reception voice signal.
Compared with prior art, the having the beneficial effect that of the application
In this application, multiple vehicles are installed the car networked system of car-mounted terminal composition, by described car networked system
In some described car-mounted terminal in a broadcast manner by broadcast message send to the wireless network connecting this car networked system
Network, in car networked system, other each car-mounted terminals in addition to car-mounted terminal some described receive from described wireless network
Broadcast message, and judge whether the broadcast message received is its broadcast message generated；If so, institute is abandoned
State the broadcast message received；If it is not, the broadcast message received described in Zhuan Faing, and to the described broadcast received
Message packet resolves, and obtains receiving data, it is possible to achieve the communication plans such as the voice communication of car and car, improves road and drive
Sail experience and be easy to traffic department's command and management to road running vehicle.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present application, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, the accompanying drawing in describing below is only some embodiments of the application, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain it according to these accompanying drawings
His accompanying drawing.
Fig. 1 is a kind of flow chart of the communication means that the application provides；
Fig. 2 is a kind of sub-process figure of the communication means that the application provides；
Fig. 3 is the another kind of sub-process figure of the communication means that the application provides；
Fig. 4 is another the sub-process figure of the communication means that the application provides；
Fig. 5 is a kind of logical structure schematic diagram of the car-mounted terminal that the application provides.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is carried out clear, complete
Describe, it is clear that described embodiment is only some embodiments of the present application rather than whole embodiments wholely.Based on
Embodiment in the application, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, broadly falls into the scope of the application protection.
Embodiment one
In the present embodiment, it is provided that a kind of communication means, being applied to car networked system, described car networked system includes many
Individual car-mounted terminal, each described car-mounted terminal is communicated by wireless network.Wherein, each car-mounted terminal communication function is identical
Each car-mounted terminal i.e. is provided with sending function, receive capabilities and forwarding capability.
Owing to the communication function of each car-mounted terminal is identical, the most only any in car networked system
The communication means of one car-mounted terminal illustrates, specific as follows:
Broadcast message, when as transmitting terminal, is sent to described by some described car-mounted terminal in a broadcast manner
Wireless network, so that other car-mounted terminals in addition to car-mounted terminal some described receive and forward in described car networked system
Described broadcast message, and described broadcast message is resolved, obtain data to be sent.
Some described car-mounted terminal, when as receiving terminal, receives broadcast message from described wireless network, and
Judge whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, and the described broadcast message received is resolved, obtain receive data.
Some described car-mounted terminal, as when forwarding end, receives broadcast message from described wireless network, and
Judge whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing.
On the communication infrastructure that car-mounted terminal some described possesses above-mentioned sending function, receive capabilities and forwarding capability,
This some described car-mounted terminal refers to Fig. 1 in the process communicated with other car-mounted terminals in car networked system, its
Show a kind of flow chart of the communication means that the application provides, may comprise steps of:
Step S11: in described car networked system, some described car-mounted terminal is in a broadcast manner by broadcast message
Send to described wireless network.
Step S12: in described car networked system other each car-mounted terminals in addition to car-mounted terminal some described from
Described wireless network receives broadcast message, and judges whether the broadcast message received is that its broadcast generated disappears
Breath message.
If the broadcast message received is its broadcast message generated, then perform step S13, if receive is wide
Broadcast the broadcast message that message packet does not generates for it, then perform step S14.
Step S13: the broadcast message received described in abandoning.
Step S14: the broadcast message received described in forwarding, and the described broadcast message received is carried out
Resolve, obtain receiving data.
In the present embodiment, the broadcast that the broadcast message received described in forwarding will receive the most in a broadcast manner
Message packet sends to wireless network, it is achieved forward.It should be understood that the wireless network that is forwarded to here specifically refers to be forwarded to
The car-mounted terminal being directly connected.
In this application, multiple vehicles are installed the car networked system of car-mounted terminal composition, by described car networked system
In some described car-mounted terminal in a broadcast manner by broadcast message send to the wireless network connecting this car networked system
Network, in car networked system, other each car-mounted terminals in addition to car-mounted terminal some described receive from described wireless network
Broadcast message, and judge whether the broadcast message received is its broadcast message generated；If so, institute is abandoned
State the broadcast message received；If it is not, the broadcast message received described in Zhuan Faing, and to the described broadcast received
Message packet resolves, and obtains receiving data, it is possible to achieve the communication plans such as the voice communication of car and car, improves road and drive
Sail experience and be easy to traffic department's command and management to road running vehicle.Further, owing to using car-mounted terminal to carry out
Communication, will not produce expense compared to the mode of mobile communication.And car-mounted terminal can be powered by vehicle power, by battery electricity
Amount uses and limits.
In the present embodiment, above-mentioned steps S11 is seen to step S14, it is known that, communicate between the car-mounted terminal in wireless network
Use the mode of broadcast, it is ensured that all car-mounted terminals in wireless network all can receive corresponding broadcast message,
And after receiving corresponding broadcast message, be forwarded away so that broadcast message can be propagated with multi-hop, improves
The network efficiency of broadcast communication.
In the present embodiment, car-mounted terminal is by performing communication application program, it is achieved the function of overseas broadcast data and connecing
Receive the function of the data that other car-mounted terminals send.Car-mounted terminal uses the treatment mechanism of Time Slice Circular Scheduling algorithm so that
Each thread obtains the timeslice of CPU in turn, and then ensures the concurrent processing of multithreading.Communication application program uses multithreading to set
Meter, one of them thread carries out overseas broadcast data, and the reception that thread carries out broadcast message processes, and two concurrent
Thread ensure that real-time and the continuity of communication.
In the present embodiment, when the communication mode between by car-mounted terminal is defined to voice communication, the networking of above-mentioned car is
In system, broadcast message is sent the process to described wireless network by some described car-mounted terminal in a broadcast manner, specifically
Can be:
Step A11: obtain the voice signal of user's input.
In the present embodiment, car-mounted terminal the hand-held microphone included obtains the voice signal of user's input, and wherein, user is permissible
The input of voice is controlled by controlling the key switch of hand-held microphone.
Step A12: the voice signal inputting described user encodes, obtains voice data to be sent.
Voice signal, after the voice signal getting user's input, is sent the sound included to car-mounted terminal by above-mentioned hand-held microphone
Frequently codec.Voice signal is then encoded by audio codec, obtains voice data to be sent.
Step A13: be packaged described voice data to be sent, obtains described broadcast message.
The main control module that car-mounted terminal includes is conducting state at key switch hand-held microphone being detected, and audio codec
Voice signal is encoded, when obtaining voice data to be sent, from audio codec, obtains voice data to be sent, and
Voice data to be sent is carried out the encapsulation of prescribed form, obtains broadcast message.
Step A14: described broadcast message is sent to described wireless network by the mode of broadcast；
Accordingly, the above-mentioned broadcast message to receiving resolves, and obtains receiving the process of data, the most permissible
For；
Step B11: resolve the broadcast message received, obtains receiving voice data.
In the present embodiment, the communication module in car-mounted terminal can receive other car-mounted terminals from described wireless network
The broadcast message sent.
Above-mentioned main control module reads the broadcast message received from above-mentioned communication module, resolves through data protocol and connects
The broadcast message received, obtains receiving voice data, and will receive audio data transmitting to above-mentioned audio codec.
Step B12: be decoded described reception voice data, obtains receiving voice signal, and plays described reception language
Tone signal.
In the present embodiment, above-mentioned audio codec dock the sound decoding data that quiets down, obtain receiving voice letter
Number, and export reception voice signal to speaker, speaker play and receive voice signal.
In the present embodiment, other each vehicle-mounted end in addition to car-mounted terminal some described in above-mentioned car networked system
End receives broadcast message from described wireless network, and judges whether the broadcast message received is the wide of its generation
Broadcast the detailed process of message packet, may refer to Fig. 2, may comprise steps of:
Step S21: in described car networked system, other each car-mounted terminals in addition to car-mounted terminal some described are sentenced
Whether the destination address of the message packet in disconnected described wireless network is multicast address.
If so, step S22 is performed.
Step S22: the message packet in described wireless network is received as broadcast message.
Step S23: judge the source address in the broadcast message that receives whether with itself link-local address
Identical, described link-local address is that the MAC Address to described car-mounted terminal maps obtained address.
Link-local address is that the MAC Address to this car-mounted terminal maps obtained address.Due to car-mounted terminal
MAC Address be unique, therefore by car-mounted terminal MAC Address map and come link-local address be also unique, from
And determine car-mounted terminal unique address in the wireless network.Source address in broadcast message is that this broadcast message message produces
The address of raw car-mounted terminal.
In the present embodiment, it is judged that the source address in the broadcast message received whether with itself link-local
Address is identical, is to judge that whether the broadcast message received is the broadcast message that this car-mounted terminal sends out.
If the source address in the broadcast message received is identical with the link-local address of itself, then illustrate to receive
To broadcast message be this car-mounted terminal generate；If the source address in the broadcast message received and itself
Link-local address differs, then illustrate that the broadcast message received is not that this car-mounted terminal generates.
In the present embodiment, step S14 directly forwards the broadcast message received (i.e. directly in a broadcast manner
Send the broadcast message that receives to described wireless network) range of scatter of broadcast can be expanded, promote vehicle and exist
Communication distance in wireless environment.But, use the mode directly forwarding the broadcast message received, can cause same
Broadcast message can be repeated several times forwarding between whole nodes.Such as, if wireless network has n car-mounted terminal, n is produced
Individual broadcast message, and the worst in the case of other n-1 car-mounted terminal all can participate in forward, it is the most near
There is n-1 copy less, the communications burden of whole network will be significantly greatly increased, and communication efficiency will greatly reduce.
In order to solve directly to forward the broadcast message received, and the communications burden of whole network is caused greatly to increase
Add, the problem that communication efficiency will greatly reduce, in the present embodiment, to the broadcast received described in forwarding in step S14
The process of message is defined, and specifically may refer to Fig. 3, may comprise steps of:
Step S31: whether the transmission of the broadcast message received described in judgement jumps limit more than zero.
If so, step S32 is performed, if it is not, perform step S33.
In the present embodiment, jump limit (hop_limit) by limiting the transmission of broadcast message, limit broadcast
Message life span in the wireless network.Transmission is jumped limit and is endowed a preset value when broadcast message generates, and is big
In the positive integer of 0.
When the transmission of the broadcast message received jumps limit more than zero, turning of the broadcast message received is described
Send out number of times not up to transmission and jump the higher limit of limit, then perform step S32；Transmission at the broadcast message received jumps limit not
During more than zero, illustrate that the hop count of the broadcast message received has reached transmission and jumped the higher limit of limit, then perform step
S33。
Step S32: perform described transmission and jump the operation that limit subtracts 1, jumps the value after limit subtracts 1 by described transmission and is assigned to described
Limit, and the broadcast message message received described in forwarding are jumped in transmission.
Step S33: the broadcast message received described in abandoning.In the present embodiment, the broadcast report received
The hop count of literary composition can be jumped limit by transmission and be controlled, and the number of times that each broadcast message received at most is forwarded is transmission
Jump the higher limit of limit, it is to avoid between whole nodes, forwarding is repeated several times, alleviates the communications burden of whole network, improve communication
Efficiency.
Although limit is jumped in transmission can control broadcast message life span in a network, but cannot avoid because of a certain
Car-mounted terminal affects the transmission range of broadcast message to the repeating to forward of this broadcast message.Therefore, to step S32
The process of the broadcast message received described in described forwarding is further limited, and specifically may refer to Fig. 4, permissible
Comprise the following steps:
Step S41: judge that itself turns the most according to the message identification number in the described broadcast message received
The broadcast message received described in sending out.
Wherein, message identification number is the link-local address of broadcast message sender and described broadcast message is sent out
The person of sending generates the identification number of the serial number composition of broadcast message.
Wherein, broadcast message sender generates the serial number of broadcast message is that car-mounted terminal is producing new broadcast
The jack per station enclosed during message packet, to identify this car-mounted terminal unique broadcast speech message message in a network.Generate
The mode of serial number to control the generation scope of serial number, can prevent serial number unlimited in the way of using annular linear increment
Increase and overflow.The generation scope such as setting serial number is 1～n, then the Serial No. 1 of the 1st broadcast message, the 2nd
The Serial No. 2 of broadcast message, by that analogy Serial No. n of the n-th broadcast message, then next broadcast disappears
The serial number of breath message starts again to start the cycle over from 1 incremental.
In the present embodiment, some described car-mounted terminal receives up-to-date broadcast message every time, then by up-to-date
Broadcast message in message identification number more new record in protocol stack route maintenance list.
Some described car-mounted terminal is when receiving a broadcast message, by protocol stack route maintenance list
In search whether to there is the message identification number identical with the message identification number in the broadcast message that receives, if existing, then
The most forwarded over broadcast message that this receives of this car-mounted terminal being described, if not existing, then illustrating that this car-mounted terminal does not turns
Sent out this broadcast message received, and the message identification number more new record in this broadcast message received was existed
In protocol stack route maintenance table.
If so, step S42 is performed, if it is not, perform step S43.
Step S42: the broadcast message received described in abandoning.
Step S43: the broadcast message received described in forwarding.
In the present embodiment, some described car-mounted terminal is judging the most forwarded over broadcast report that this receives
Wen Shi, just abandons this broadcast message received；When judging the most forwarded over broadcast message that this receives, then
The broadcast message received described in forwarding.Mistake compared to the broadcast message received described in the forwarding shown in Fig. 4
Journey, further alleviates the communications burden of whole network, improves communication efficiency.
Embodiment two
In the present embodiment, corresponding with said method embodiment, it is provided that a kind of car-mounted terminal, refer to Fig. 5, vehicle-mounted
Terminal includes sending module 51, receiver module the 52, first judge module 53, discard module 54, forwarding module 55 and parsing module
56。
Sending module 51, in a broadcast manner broadcast message being sent to described wireless network, so that described
In car networked system, other each car-mounted terminals in addition to car-mounted terminal some described receive extensively from described wireless network
Broadcast message packet.
Receiver module 52, for receiving broadcast message from described wireless network.
First judge module 53, for judging whether the broadcast message received is its broadcast report generated
Literary composition, if so, perform discard module 54 abandon described in the broadcast message that receives, if it is not, perform forwarding module 55 to forward institute
State the broadcast message received, and perform parsing module 56 the described broadcast message received is resolved,
To receiving data.Wherein forwarding module 55 and sending module 51 can be same module.
In the present embodiment, sending module 51 specifically may include that the first acquiring unit, coding unit and encapsulation unit.
Accordingly, parsing module 56 specifically may include that resolution unit, decoding unit and broadcast unit.Wherein:
First acquiring unit, for obtaining the voice signal of user's input.
Coding unit, encodes for the voice signal inputting described user, obtains voice data to be sent.
Encapsulation unit, for being packaged described voice data to be sent, obtains described broadcast message.
Resolution unit, for resolving the broadcast message received, obtains receiving voice data；
Decoding unit, for being decoded described reception voice data, obtains receiving voice signal.
Broadcast unit, is used for playing described reception voice signal.
In above-mentioned car-mounted terminal, receiver module 52 specifically may include that the first judging unit and first receives unit.Phase
Answering, the first judge module 53 may include that the second judging unit.Wherein:
Whether the first judging unit, be multicast ground for judging the destination address of the message packet in described wireless network
Location, if so, performs the first reception unit and is received as broadcast message by the message packet in described wireless network.
Second judging unit, for judge source address in the broadcast message that receives whether with car some described
The link-local address of mounted terminal is identical, and described link-local address is to carry out the MAC Address of car-mounted terminal some described
Address obtained by mapping.
In above-mentioned car-mounted terminal, forwarding module 55 specifically may include that the 3rd judging unit, the first retransmission unit,
One processing unit and the first discarding unit.Wherein:
3rd judging unit, whether the transmission of the broadcast message received described in judge jump limit more than zero, if
It is to perform the first retransmission unit, if it is not, perform the first discarding unit.
Described first retransmission unit, is used for performing described transmission and jumps the operation that limit subtracts 1, after subtracting 1 by described transmission jumping limit
Value be assigned to described transmission and jump limit, and the broadcast message that receives described in forwarding.
Described first discarding unit, is used for the broadcast message received described in abandoning.
Above-mentioned first retransmission unit specifically may include that the first judgment sub-unit, first abandon subelement and first forward
Subelement.
First judgment sub-unit, the message identification number in the broadcast message received described in basis judges a certain
The broadcast message received described in individual described car-mounted terminal is the most forwarded over, if so, performs first and abandons subelement, if
No, perform the first forwarding subelement.
Described first abandons subelement, is used for the broadcast message received described in abandoning.
Described first forwards subelement, is used for the broadcast message received described in forwarding.
Wherein, the link-local that message identification number is broadcast message sender in the broadcast message received
Address and described broadcast message sender generate the identification number of the serial number composition of broadcast message.
In the present embodiment, it is provided that a kind of car networked system, including multiple car-mounted terminals, each described car-mounted terminal leads to
Crossing wireless network to communicate, wherein the concrete structure of each car-mounted terminal is identical with a upper embodiment, and concrete structure refers to
Fig. 5, does not repeats them here.
Some described car-mounted terminal in described car networked system, for sending broadcast message in a broadcast manner
To described wireless network.
Other each car-mounted terminals in addition to car-mounted terminal some described in described car networked system, for from described
Wireless network receives broadcast message, and judges whether the broadcast message received is its broadcast report generated
Literary composition；If so, the broadcast message received described in abandoning；If it is not, the broadcast message received described in Zhuan Faing, and to institute
State the broadcast message received to resolve, obtain receiving data.
It should be noted that each embodiment in this specification all uses the mode gone forward one by one to describe, each embodiment weight
Point explanation is all the difference with other embodiments, and between each embodiment, identical similar part sees mutually.
For device class embodiment, due to itself and embodiment of the method basic simlarity, so describe is fairly simple, relevant part ginseng
See that the part of embodiment of the method illustrates.
Finally, in addition it is also necessary to explanation, in this article, the relational terms of such as first and second or the like be used merely to by
One entity or operation separate with another entity or operating space, and not necessarily require or imply these entities or operation
Between exist any this reality relation or order.And, term " includes ", " comprising " or its any other variant meaning
Containing comprising of nonexcludability, so that include that the process of a series of key element, method, article or equipment not only include that
A little key elements, but also include other key elements being not expressly set out, or also include for this process, method, article or
The key element that equipment is intrinsic.In the case of there is no more restriction, statement " including ... " key element limited, do not arrange
Except there is also other identical element in including the process of described key element, method, article or equipment.
Above a kind of car networked system, communication means and car-mounted terminal provided herein are described in detail,
Principle and the embodiment of the application are set forth by specific case used herein, and the explanation of above example is simply used
The present processes and core concept thereof is understood in help；Simultaneously for one of ordinary skill in the art, according to the application's
Thought, the most all will change, and in sum, this specification content should not be construed as
Restriction to the application.
Claims (10)
1. a communication means, it is characterised in that be applied to car networked system, described car networked system includes multiple vehicle-mounted end
End, each described car-mounted terminal is communicated by wireless network, and described method includes:
In described car networked system, broadcast message is sent to described nothing by some described car-mounted terminal in a broadcast manner
Gauze network；
In described car networked system, other each car-mounted terminals in addition to car-mounted terminal some described are from described wireless network
Middle reception broadcast message, and judge whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing, and the described broadcast message received is resolved,
To receiving data.
Method the most according to claim 1, it is characterised in that in described car networked system some described car-mounted terminal with
Broadcast message is sent the process to described wireless network by the mode of broadcast, including:
Obtain the voice signal of user's input；
The voice signal inputting described user encodes, and obtains voice data to be sent；
Described voice data to be sent is packaged, obtains described broadcast message；
By the mode of broadcast, described broadcast message is sent to described wireless network；
The broadcast message received is resolved, obtains receiving the process of data, including；
The broadcast message received is resolved, obtains receiving voice data；
Described reception voice data is decoded, obtains receiving voice signal, and play described reception voice signal.
Method the most according to claim 1 and 2, it is characterised in that described vehicle-mounted except some in described car networked system
Other each car-mounted terminals outside terminal receive broadcast message from described wireless network, and judge the broadcast received
Whether message packet is the process of its broadcast message generated, including:
In described car networked system, other each car-mounted terminals in addition to car-mounted terminal some described judge described wireless network
Whether the destination address of the message packet in network is multicast address；
If so, the message packet in described wireless network is received as broadcast message；
Judge that the source address in the broadcast message received is the most identical with the link-local address of itself, described this locality
Link address is that the MAC Address to described car-mounted terminal maps obtained address.
Method the most according to claim 3, it is characterised in that the process of the broadcast message received described in forwarding,
Including:
Whether the transmission of the broadcast message received described in judgement jumps limit more than zero；
The most then the operation that limit subtracts 1 is jumped in execution transmission, and the value after subtracting 1 by described transmission jumping limit is assigned to described transmission and jumps limit,
And the broadcast message message received described in forwarding；
If it is not, the broadcast message received described in abandoning.
Method the most according to claim 4, it is characterised in that limit is jumped in the transmission at the described broadcast message received
During more than zero, the process of the broadcast message received described in forwarding, including:
Itself the most forwarded over described reception is judged according to the message identification number in the described broadcast message received
The broadcast message arrived；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing.
Method the most according to claim 5, it is characterised in that described message identification number is broadcast message sender
Link-local address and described broadcast message sender generate the identification number of the serial number composition of broadcast message.
7. a communication means, it is characterised in that some car-mounted terminal being applied in car networked system, described method bag
Include:
Broadcast message, when as transmitting terminal, is sent to described wireless by some described car-mounted terminal in a broadcast manner
Network, so that other each car-mounted terminals in addition to car-mounted terminal some described are from described wireless in described car networked system
Network receives broadcast message；
Some described car-mounted terminal, when as receiving terminal, receives broadcast message from described wireless network, and judges
Whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, and the described broadcast message received is resolved, obtain receive data；
Some described car-mounted terminal, as when forwarding end, receives broadcast message from described wireless network, and judges
Whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；
If it is not, the broadcast message received described in Zhuan Faing.
8. a car-mounted terminal, it is characterised in that including:
Sending module, in a broadcast manner broadcast message being sent to described wireless network, so that the networking of described car
In system, other each car-mounted terminals in addition to car-mounted terminal some described receive broadcast from described wireless network
Message；
Receiver module, for receiving broadcast message from described wireless network；
First judge module, for judging whether the broadcast message received is its broadcast message generated, if so,
Perform discard module abandon described in the broadcast message that receives, if it is not, perform forwarding module forward described in receive wide
Broadcast message packet, and perform parsing module the described broadcast message received is resolved, obtain receiving data.
9. a car networked system, it is characterised in that including: multiple car-mounted terminals as claimed in claim 8, each described car
Mounted terminal is communicated by wireless network, wherein:
Some described car-mounted terminal in described car networked system, for sending broadcast message to institute in a broadcast manner
State wireless network；
Other each car-mounted terminals in addition to car-mounted terminal some described in described car networked system, for from described wireless
Network receives broadcast message, and judges whether the broadcast message received is its broadcast message generated；
If so, the broadcast message received described in abandoning；If it is not, the broadcast message received described in Zhuan Faing, and to described
The broadcast message received resolves, and obtains receiving data.
Car networked system the most according to claim 9, it is characterised in that some described car-mounted terminal includes:
First acquiring unit, for obtaining the voice signal of user's input；
Coding unit, encodes for the voice signal inputting described user, obtains voice data to be sent；
Encapsulation unit, for being packaged described voice data to be sent, obtains described broadcast message；
Resolution unit, for resolving the broadcast message received, obtains receiving voice data；
Decoding unit, for being decoded described reception voice data, obtains receiving voice signal；
Broadcast unit, is used for playing described reception voice signal.
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| CN201610503090.5A CN106211089A (en) | 2016-06-30 | 2016-06-30 | A kind of car networked system, communication means and car-mounted terminal |
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| CN201610503090.5A CN106211089A (en) | 2016-06-30 | 2016-06-30 | A kind of car networked system, communication means and car-mounted terminal |
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