CN110086566A - A kind of transmission method and mobile unit of vehicle-mounted data - Google Patents
A kind of transmission method and mobile unit of vehicle-mounted data Download PDFInfo
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- CN110086566A CN110086566A CN201910204491.4A CN201910204491A CN110086566A CN 110086566 A CN110086566 A CN 110086566A CN 201910204491 A CN201910204491 A CN 201910204491A CN 110086566 A CN110086566 A CN 110086566A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
This application discloses a kind of transmission methods of vehicle-mounted data, are applied to mobile unit, and transmission method includes: the data length for obtaining current data packet to be sent and current data packet to be sent；Judge whether the data length of current data packet to be sent is greater than preset length；If the data length of current data packet to be sent is not more than preset length, current data packet to be sent is sent to receiving end；When being sent, end state is sent into current data packet to be sent, mobile unit obtains next data packet to be sent.Disclosed herein as well is a kind of mobile units, the transmission method and mobile unit of vehicle-mounted data provided by the present application, after current channel calls transmission function to send current data frame to be sent, exit transmission function, so that next channel, which is called, sends the next data frame of function transmission, to realize multiple channel parallel transmission, improve data transfer efficiency.
Description
Technical field
This application involves field of data transmission more particularly to the transmission methods and mobile unit of a kind of vehicle-mounted data.
Background technique
Currently, the hair of electronic control unit (Electronic Control Unit, ECU) and big data with automobile
Exhibition, to the transmission of diagnostic data, more stringent requirements are proposed, and multi-channel data communication can save the time of data transmission.But
It is that it is logical that existing mobile unit such as onboard diagnostic system (On-Board Diagnostic, OBD) can only carry out single channel
News just can be carried out the transmission of next bag data when completing after sending and receiving of data packet, cannot carry out simultaneously two-way or
The transmission of above vehicle-mounted data, hardware resource cannot be fully utilized, and influence data transmission period.
Summary of the invention
In order to overcome the problems, such as to carry out the transmission of multichannel vehicle-mounted data, the purpose of the application simultaneously in existing mobile unit
It is the transmission method and mobile unit of a kind of vehicle-mounted data.
To achieve the goals above, the application provides a kind of transmission method of vehicle-mounted data, is applied to mobile unit, described
Transmission method includes: the data length for obtaining current data packet to be sent and the current data packet to be sent；Described in judgement
Whether the data length of current data packet to be sent is greater than preset length；If the data length of the current data packet to be sent is not
Greater than preset length, then the current data packet to be sent is sent to receiving end；When being sent, into current number to be sent
End state is sent according to packet, the mobile unit obtains next data packet to be sent.
Preferably, after whether the data length for judging the current data packet to be sent is greater than preset length,
The method also includes: it, will be described current to be sent if the data length of the current data packet to be sent is greater than preset length
Data packet is divided into first frame and several successive frames；Send the data length of the first frame and the current data packet to be sent extremely
The receiving end；Judge whether to receive the first-class control frame that the receiving end is sent, the first-class control frame includes the
The one frame number upper limit and the first transmission time interval；If receiving the first-class control frame, according between first sending time
Every successively sending the successive frame.
Preferably, if receiving the first-class control frame, the method also includes: the successive frame that judgement has been sent
Quantity whether reach the first frame number upper limit；If the not up to described first frame number upper limit, sends the successive frame；If reaching
To the first frame number upper limit, then second control frame is received.
Preferably, after judging whether to receive the first-class control frame that the receiving end is sent, the method also includes:
If not receiving the first-class control frame, judge whether the time interval more than receiving stream control frame；If being more than described connect
The time interval of flow control frame is received, then cancels the transmission of current data packet to be sent；If being less than the receiving stream control frame
Time interval then enters the current data packet to be sent and sends end state.
Preferably, described successively to send the successive frame according to first transmission time interval, specifically include: judgement is
It is no to reach first transmission time interval；If reaching, the successive frame is sent.
The application also provides a kind of transmission method of vehicle-mounted data, is applied to mobile unit, the transmission method includes: to connect
Receive current data to be transmitted frame；The current data to be transmitted frame is judged according to the flag bit of the current data to be transmitted frame
Frame type, the current data to be transmitted frame are a wherein frame for current data to be transmitted packet, and the frame type includes single frames, head
Frame, successive frame and flow control frame；If the frame type of the current data to be transmitted frame is single frames, transmit described current to be transmitted
Data frame is to data application terminal；When the current data to be transmitted packet receives, into the current data to be transmitted
Packet end of transmission state, the mobile unit transmit next data to be transmitted packet.
Preferably, the current data to be transmitted frame is judged in the flag bit according to the current data to be transmitted frame
Frame type after, the method also includes: if frame headed by the frame type of the current data to be transmitted frame, obtain described current
The length of data to be transmitted packet；It sends third flow control frame to data and sends terminal, the third flow control frame includes that third connects
Receive time interval and the third frame number upper limit；The current data to be transmitted frame is transmitted to the data application terminal；When described
Enter the current data to be transmitted packet end of transmission state when three flow control frames are sent.
Preferably, the current data to be transmitted frame is judged in the flag bit according to the current data to be transmitted frame
Frame type after, the method also includes: if the frame type of the current data to be transmitted frame is successive frame, work as described in transmission
Preceding data to be transmitted frame is to the data application terminal；When the current data to be transmitted frame end of transmission, work as described in judgement
Whether preceding data to be transmitted packet is transmitted；If not completing, judge whether the quantity of received successive frame reaches third frame number
The upper limit；If reaching the third frame number upper limit, the 4th flow control frame is sent；If the not up to described third frame number upper limit, into
Enter the current data to be transmitted packet end of transmission state.
Preferably, the current data to be transmitted frame is judged in the flag bit according to the current data to be transmitted frame
Frame type after, the method also includes: if the frame type of the current data to be transmitted frame be flow control frame, according to described
Current data to be transmitted frame determines the frame number upper limit and transmission time interval for sending data packet.
Preferably, after the current data to be transmitted frame of reception, the method also includes: obtain current number to be transmitted
It is identified according to the data message of frame；Judge whether to meet present communication protocols according to data message mark；If meeting, execute
The step of judging the frame type of the current data to be transmitted frame；If not meeting, enters the current data to be transmitted packet and pass
Defeated end state.
The application also provides a kind of mobile unit, including processor and memory, is stored with computer in the memory
Readable program, the computer-readable program are configured to be executed by processor, and the computer-readable program is held by processor
Row Shi Shixian:
Obtain the data length of current data packet to be sent and the current data packet to be sent；Judge it is described currently to
Whether the data length for sending data packet is greater than preset length；If the data length of the current data packet to be sent is no more than pre-
If length, then the current data packet to be sent is sent to receiving end；When being sent, sent out into current data packet to be sent
End state is sent, the mobile unit obtains next data packet to be sent.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data packet to be sent
Data length be greater than preset length, the current data packet to be sent is divided into first frame and several successive frames；Described in transmission
The data length of first frame and the current data packet to be sent is to the receiving end；Judge whether to receive the receiving end hair
The first-class control frame sent, the first-class control frame include the first frame number upper limit and the first transmission time interval；If receiving
The first-class control frame successively sends the successive frame according to first transmission time interval.
Preferably, it is also realized when the computer-readable program is executed by processor: the successive frame that judgement has been sent
Quantity whether reach the first frame number upper limit；If the not up to described first frame number upper limit, sends the successive frame；If reaching
To the first frame number upper limit, then second control frame is received.
Preferably, it is also realized when the computer-readable program is executed by processor: if not receiving the first-class control
Frame processed then judges whether the time interval more than receiving stream control frame；If being more than the time interval of the receiving stream control frame,
Cancel the transmission of current data packet to be sent；If being less than the time interval of the receiving stream control frame, enter described current
Data packet to be sent sends end state.
Preferably, it is also realized when the computer-readable program is executed by processor: judging whether to reach first hair
Send time interval；If reaching, the successive frame is sent.
Preferably, it is also realized when the computer-readable program is executed by processor: receiving current data to be transmitted frame；Root
The frame type of the current data to be transmitted frame is judged according to the flag bit of the current data to be transmitted frame, it is described current to be transmitted
Data frame is a wherein frame for current data to be transmitted packet, and the frame type includes single frames, first frame, successive frame and flow control frame；
If the frame type of the current data to be transmitted frame is single frames, the current data to be transmitted frame is transmitted to data application end
End；It is described into the current data to be transmitted packet end of transmission state when the current data to be transmitted packet receives
Mobile unit transmits next data to be transmitted packet.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data to be transmitted frame
Frame type headed by frame, obtain the length of the current data to be transmitted packet；It sends third flow control frame to data and sends terminal,
The third flow control frame includes third receiving time interval and the third frame number upper limit；Transmit the current data to be transmitted frame extremely
The data application terminal；Enter the current data to be transmitted packet end of transmission when the third flow control frame is sent
State.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data to be transmitted frame
Frame type be successive frame, transmit the current data to be transmitted frame to the data application terminal；When described current to be transmitted
When data frame transfer finishes, judge whether the current data to be transmitted packet is transmitted；If not completing, received company is judged
Whether the quantity of continuous frame reaches the third frame number upper limit；If reaching the third frame number upper limit, the 4th flow control frame is sent；If not
Reach the third frame number upper limit, then enters the current data to be transmitted packet end of transmission state.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data to be transmitted frame
Frame type be flow control frame, the frame number upper limit and sending time for sending data packet are determined according to the current data to be transmitted frame
Interval.
Preferably, it is also realized when the computer-readable program is executed by processor: obtaining current data to be transmitted frame
Data message mark；Judge whether to meet present communication protocols according to data message mark；If meeting, executes and judge institute
The step of stating the frame type of current data to be transmitted frame；If not meeting, enter the current data to be transmitted packet end of transmission
State.
Compared with prior art, the beneficial effects of the present application are as follows: current channel call send function send it is current to be sent
Data frame after, transmission function is exited, so that next channel calls and sends function and send next data frame, to realize more
A channel parallel transmission, makes full use of hardware resource, improve data transfer efficiency.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described.
Fig. 1 is the first application scenario diagram of the transmission method of vehicle-mounted data provided by the embodiments of the present application；
Fig. 2 is the second application scenario diagram of the transmission method of vehicle-mounted data provided by the embodiments of the present application；
Fig. 3 is the flow chart of the transmission method for the vehicle-mounted data that the application first embodiment provides；
Fig. 4 is the flow chart of the transmission method for the vehicle-mounted data that the application second embodiment provides；
Fig. 5 is the flow chart that successive frame is successively sent according to the first transmission time interval；
Fig. 6 is the flow chart of the transmission method for the vehicle-mounted data that the application 3rd embodiment provides；
Fig. 7 is the flow chart of the transmission method for the vehicle-mounted data that the application fourth embodiment provides；
Fig. 8 is the data transmission method flow chart in an embodiment after receiving current data to be transmitted frame；
Fig. 9 is the flow chart of the transmission method for the vehicle-mounted data that the 5th embodiment of the application provides；
Figure 10 is the flow chart of the transmission method for the vehicle-mounted data that the application sixth embodiment provides；
Figure 11 is the schematic diagram of mobile unit provided by the embodiments of the present application.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the application, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
It as shown in Figs. 1-2, is the application scenario diagram of the transmission method of vehicle-mounted data provided by the embodiments of the present application, the data
Transmission method is applied to mobile unit, and mobile unit can be the OBD box connecting with the OBD interface on vehicle.It is set when vehicle-mounted
For when sending vehicle ECU for diagnostic instruction, mobile unit is transmitting terminal, when mobile unit obtains the diagnosis that vehicle ECU is returned
When data, mobile unit is receiving end.
As shown in figure 3, the transmission method for the vehicle-mounted data that the application first embodiment provides, the number applied to mobile unit
According to transmission, mobile unit is transmitting terminal, which includes:
Step S101: the data length of current data packet to be sent and the current data packet to be sent is obtained.
Wherein, when mobile unit gets data to be sent, package to data to be sent to be formed a data packet or
The multiple data packets of person.For example, diagnostic instruction is divided by multiple data packets according to the type of the diagnostic instruction got, it is right respectively
The different ECU that should be sent on vehicle.When data to be sent form multiple data packets, multiple data packets pass through respectively it is multiple not
Same channel is sent, and current data packet to be sent passes through current channel and sends.
Step S102: judge whether the data length of the current data packet to be sent is greater than preset length.
Wherein, preset protocol is deferred in the data of mobile unit and receiving end transmission, and the data length sent every time cannot surpass
Cross preset length.For example, 15765 agreement of ISO, the data length sent every time are deferred in the transmission of the data of transmitting terminal and receiving end
No more than 7 bytes.
Step S103: if the data length of the current data packet to be sent is not more than preset length, work as described in transmission
Preceding data packet to be sent is to receiving end.
As shown in Figure 1, if the data length of current data packet to be sent is not more than preset length, it will current number to be sent
A data frame is formed according to packet, current channel, which calls, sends function, and single frame transmission is carried out between mobile unit and receiving end.
Step S104: when being sent, end state is sent into current data packet to be sent, the mobile unit obtains
Take next data packet to be sent.
After the completion of current channel calls transmission function and runs, transmission function is exited, is sent out into current data packet to be sent
End state is sent, while next channel calls and sends the next data packet to be sent of function transmission, hair is called in next channel
It send and completes data receiver without waiting for current channel when function, multiple channel parallels send data.In one embodiment, when
After prepass calls transmission function, rest channels, which are successively called, sends function one data frame of transmission, when the last one channel tune
After sending function one data frame of transmission, current channel, which recalls, sends the next data frame of function transmission.Another real
Apply in mode, current channel calls send function after, rest channels, which are successively called, sends function one data frame of transmission, when reaching
When preset time, current channel, which recalls, sends the next data frame of function transmission.
In above-described embodiment, if the data length of current data packet to be sent is less than preset length, current data to be sent
When packet is sent, end state is sent into current data packet to be sent, mobile unit obtains next data packet to be sent
Data transmission is carried out, so as to while send multiple data packets, make full use of hardware resource so that multiple channel parallels work,
Save sending time.
As shown in figure 4, the transmission method for the vehicle-mounted data that the application second embodiment provides, comprising:
Step S201: the data length of current data packet to be sent and the current data packet to be sent is obtained.
Step S202: judge whether the data length of the current data packet to be sent is greater than preset length.
Step S203: if the data length of the current data packet to be sent is not more than preset length, work as described in transmission
Preceding data packet to be sent is to receiving end.
Step S204: when being sent, end state is sent into current data packet to be sent, the mobile unit obtains
Take next data packet to be sent.
Step S201- step S204 is identical as the step S101- step S104 in first embodiment, and details are not described herein.
Step S205:, will be described current pending if the data length of the current data packet to be sent is greater than preset length
Data packet is sent to be divided into first frame and several successive frames.
It in one embodiment, is that a frame will current data to be sent according to every 7 bytes according to 15765 agreement of ISO
Packet is divided into multiple data frames.For example, the data length of current data packet to be sent is 30 bytes, it will current number to be sent
It is divided into 5 data frames according to packet, preceding 7 bytes are first frame, remaining is successive frame.Each data frame further includes one and identifies the number
According to the byte of the frame type of frame, so that receiving end obtains the frame type of every number frame.
Step S206: the data length of the first frame and the current data packet to be sent is sent to the receiving end.
Step S207: judge whether to receive the first-class control frame that the receiving end is sent, the first-class control frame
Including the first frame number upper limit and the first transmission time interval.
Wherein, the first frame number upper limit is the upper limit of the continuous received successive frame in receiving end, and the caching by the ECU of receiving end is big
Small decision, such as the length of a frame data is 8 bytes, the cache size of ECU is 2k, then the first frame number upper limit is 256 frames.First
Transmission time interval is the transmission time interval between two data frames, is determined by the parallel processing task of the CPU of receiving end,
If parallel processing task is more, time interval is just bigger, such as 100ms, if without parallel processing task, time interval
It is just smaller, such as 0s.
Step S208: if receiving the first-class control frame, institute is successively sent according to first transmission time interval
State successive frame.
As shown in Fig. 2, mobile unit sends the first frame data to receiving end, when receiving first-class control frame, start
Send successive frame.
As shown in figure 5, in one embodiment, successive frame is successively sent according to the first transmission time interval, it is specific to wrap
It includes:
Step S301: judge whether to reach first transmission time interval.
Step S302: if reaching, the successive frame is sent.
Step S303: if not up to, entering the current data packet to be sent and sending end state.
Specifically, current channel, which calls, sends function transmission successive frame, if not reaching if reaching the first transmission time interval
To the first transmission time interval, then enters current data packet to be sent and send end state, next channel, which is called, sends function
Carry out the transmission of next data packet.
Step S209: if not receiving the first-class control frame, judge whether the time more than receiving stream control frame
Interval.
Step S210: if being more than the time interval of the receiving stream control frame, cancel the hair of current data packet to be sent
It send.
Step S211: if being less than the time interval of the receiving stream control frame, enter the current data to be sent
Packet sends end state.
Specifically, cancel the transmission of current data packet to be sent if being more than the time interval of receiving stream control frame, it is next
A channel, which is called, sends the next data packet of function transmission, if being less than the time interval of receiving stream control frame, enters current
Data packet to be sent sends end state, and next channel, which is called, sends the next data packet of function transmission.
In above-described embodiment, after the current data frame to be sent of current data packet to be sent is sent, calls and receive letter
Number receives first-class control frame, or enters current data packet to be sent and send end state, calls and sends out for next channel
The transmission for sending function to carry out next data packet, so as to so that multiple channel parallels transmit data, make full use of hardware resource,
Improve data transmission efficiency.
In another embodiment, the transmission method of vehicle-mounted data can only include step S201- step S208.
As shown in fig. 6, in the transmission method for the vehicle-mounted data that the application 3rd embodiment provides, if receiving first-class control
Frame processed, this method further include:
Step S401: whether the quantity for the successive frame that judgement has been sent reaches the first frame number upper limit.
Step S402: if the not up to described first frame number upper limit, sends the successive frame.
Step S403: if reaching the first frame number upper limit, second control frame is received.
In one embodiment, it if current data packet to be sent is sent in a frame number upper limit, sends
The transmission of the last one complete data frame backed off after random current data packet.If current data packet to be sent in a frame number upper limit not
It is sent completely, then judges whether the quantity of the successive frame sent reaches on the first frame number after each successive frame is sent completely
Limit, if reaching the first frame number upper limit, receives receiving end hair if the not up to first frame number upper limit, sends next successive frame
The second control frame sent.For example, being sent in a manner of successive frame if the data length of current data packet to be sent is 4k byte
Current data packet to be sent, when the first frame number upper limit of the first-class control frame that the ECU of receiving end is returned is 256 frame, then
Mobile unit distribute just need after the data length of 7B*256=1792B to wait next flow control frames be further continued for sending it is remaining
Data.
As shown in fig. 7, the transmission method for the vehicle-mounted data that the application fourth embodiment provides, the number applied to mobile unit
According to reception, mobile unit is receiving end, which includes:
Step S501: current data to be transmitted frame is received.
In one embodiment, current data to be transmitted frame carries data message mark, data message mark with it is each
The communication protocol of data transmission channel is corresponding.
As shown in figure 8, in one embodiment, after receiving current data to be transmitted frame, which is also wrapped
It includes:
Step S601: the data message mark of current data to be transmitted frame is obtained.
Step S602: judge whether to meet present communication protocols according to data message mark.
Step S603: if meeting, the step of executing the frame type for judging the current data to be transmitted frame.
Step S604: if not meeting, enter the current data to be transmitted packet end of transmission state.
In one embodiment, the corresponding communication protocol in each channel, carries according to current data to be transmitted frame
Data message identifies whether meeting present communication protocols can judge whether be current channel data to be transmitted, if meeting,
Step S502 is executed, if not meeting, current channel exits the calling of receiver function, transmits and ties into current data to be transmitted packet
Pencil state, receiver function is called in next channel, to realize the parallel data transmission in multiple channels.
Step S502: the frame of the current data to be transmitted frame is judged according to the flag bit of the current data to be transmitted frame
Type, the current data to be transmitted frame are a wherein frame for current data to be transmitted packet, and the frame type includes single frames, head
Frame, successive frame and flow control frame.
For example, current data to be transmitted frame is FF FF FF FF FF FF FF FF FF FF FF FF, data length is
12 bytes, wherein preceding 4 bytes are flag bit, for indicating the frame type of current data to be transmitted frame.For example, 0X0X table
Show that single frames, 0X1X indicate that first frame, 0X2X indicate that successive frame, 0X3X indicate flow control frame.
Step S503: if the frame type of the current data to be transmitted frame is single frames, the current number to be transmitted is transmitted
According to frame to data application terminal.
As shown in Figure 1, in one embodiment, if the frame type of current data to be transmitted frame is single frames, illustrating to work as
Preceding data frame to be received is a data packet, and the data of mobile unit and transmitting terminal are transmitted as single frame transmission, and mobile unit will connect
The current data to be transmitted frame received is transmitted to data application terminal.
Step S504: it when the current data to be transmitted packet receives, is passed into the current data to be transmitted packet
Defeated end state, the mobile unit transmit next data to be transmitted packet.
After current channel calls receiver function to receive current data to be transmitted frame, transmitted into current data to be transmitted packet
End state, next channel call receiver function to transmit next data to be transmitted packet.In one embodiment, current logical
After road calls receiver function to receive current data to be transmitted frame, rest channels successively call the number of receiver function reception corresponding channel
According to frame, after the last one channel calls receiver function to receive a data frame, current channel is recalled under receiver function reception
One data frame.
In above-described embodiment, if the frame type of current data to be transmitted frame is single frames, current data to be transmitted frame is transmitted extremely
Data application terminal, after current channel calls receiver function to receive current data to be transmitted packet, into current data to be transmitted packet
End of transmission state, so that next channel of mobile unit calls receiver function to transmit next data to be transmitted packet, thus
Realize the parallel transmission of multiple data packets.
As shown in figure 9, the transmission method for the vehicle-mounted data that the 5th embodiment of the application provides, the area with fourth embodiment
Be not, the frame type of current data to be transmitted frame is judged according to the flag bit of current data to be transmitted frame after, the party
Method further include:
Step S701: if frame headed by the frame type of the current data to be transmitted frame, the current data to be transmitted is obtained
The length of packet.
As shown in Fig. 2, if frame headed by the frame type of current data to be transmitted frame, current data to be transmitted frame carry currently to
The information for transmitting the data length of data packet could receive after mobile unit sends third flow control frame according to preset protocol
Successive frame.
Step S702: third flow control frame to data are sent and send terminal, the third flow control frame includes that third receives
Time interval and the third frame number upper limit.
Wherein, mobile unit according to the parallel processing task and cache size of CPU calculate the first receiving time interval and
The first frame number upper limit, the time interval being divided between the first receiving time between received two data frames, the first frame number upper limit are
Mobile unit sends the quantity of received data frame between third flow control frame and next flow control frame.
Step S703: the transmission current data to be transmitted frame to the data application terminal.
Step S704: enter the current data to be transmitted packet end of transmission when the third flow control frame is sent
State.
In one embodiment, current channel calls receiver function to receive current data to be transmitted frame, transmission currently to
Transmitting data frame is to data application terminal, and after sending third flow control frame, into current data to be transmitted packet end of transmission shape
Receiver function is called to receive next data packet in next channel of state, mobile unit.
The transmission method of vehicle-mounted data provided by the above embodiment, if frame headed by the frame type of current data to be transmitted frame,
The length of current data to be transmitted packet is obtained, third flow control frame to data is sent and sends terminal, transmit current data to be transmitted
Frame is to data application terminal.Enter the current data to be transmitted packet end of transmission when third flow control frame of current channel is sent
State, for next channel call receiver function receive the data frame of next data packet, thus realize multiple channels and
The transmission of row data.
As shown in Figure 10, the transmission method for the vehicle-mounted data that the application sixth embodiment provides, with fourth embodiment
Difference is, the frame type of current data to be transmitted frame is judged according to the flag bit of current data to be transmitted frame after, should
Method further include:
Step S801: if the frame type of the current data to be transmitted frame is successive frame, the current number to be transmitted is transmitted
According to frame to the data application terminal.
Step S802: when the current data to be transmitted frame end of transmission, judge that the current data to be transmitted packet is
It is no to be transmitted.
Step S803: if not completing, judge whether the quantity of received successive frame reaches the third frame number upper limit.
In one embodiment, if finishing receiving current data to be transmitted packet in a frame number upper limit, when currently to
After transmission data packet finishes receiving, into current data to be transmitted packet end of transmission state, receiver function is called in next channel
Receive next data packet.It is each having received if current data to be transmitted packet cannot be finished receiving in a frame number upper limit
After successive frame, judge whether the quantity of received successive frame reaches the first frame number upper limit.
Step S804: if reaching the third frame number upper limit, the 4th flow control frame is sent.
Specifically, after current channel calls receiver function to receive current data to be transmitted frame, if reaching the third frame number upper limit,
Sending the 4th flow control frame, the 4th flow control frame includes the 4th frame number upper limit and the 4th receiving time interval, according to preset protocol,
After mobile unit sends the 4th flow control frame, next successive frame of current data packet is received.
Step S805: if the not up to described third frame number upper limit, enter the current data to be transmitted packet end of transmission
State.
Specifically, after current channel calls receiver function to receive current data to be transmitted frame, if not up on third frame number
Limit, into current data to be transmitted packet end of transmission state, current channel exits receiver function, and next channel, which is called, receives letter
Number receives next data packet.
In above-described embodiment, if the frame type of current data to be transmitted frame is successive frame, current data to be transmitted frame is transmitted
To data application terminal, when current channel calls receiver function to complete the transmission of current data to be transmitted frame, receiver function is exited,
If current data to be transmitted Bao Wei is transmitted, judge whether the quantity of received successive frame reaches the third frame number upper limit, if
Reach the third frame number upper limit, then send the 4th flow control frame, if the not up to third frame number upper limit, enters current data to be transmitted
Packet end of transmission state, so that next channel calls receiver function to receive the data frame of next data packet, to realize more
The parallel data transmission in a channel.
The transmission method for the vehicle-mounted data that the 7th embodiment of the application provides, the difference with fourth embodiment is,
The frame type of current data to be transmitted frame is judged according to the flag bit of current data to be transmitted frame after, this method further include:
If the frame type of the current data to be transmitted frame is flow control frame, determined according to the current data to be transmitted frame
The frame number upper limit and transmission time interval of data packet to be sent.
In one embodiment, if the frame type for the current data to be transmitted frame that mobile unit receives is flow control
Frame then illustrates that current channel is carrying out the transmission of data, and mobile unit determines number to be sent according to the flow control frame received
According to the frame number upper limit and transmission time interval of the successive frame of packet.
In above-described embodiment, if the frame type for the current data to be transmitted frame that current channel receives is flow control frame, root
The frame number upper limit and transmission time interval of data packet to be sent are determined according to flow control frame, while the processing of next channel parallel is next
A data packet makes full use of hardware resource, improve data transfer efficiency to realize the parallel data transmission in multiple channels.
As shown in figure 11, mobile unit provided by the embodiments of the present application, including processor 11 and memory 12, memory 12
In be stored with computer-readable program, computer-readable program is configured to be executed by processor 11, computer-readable program quilt
Processor 11 is realized when executing:
Obtain the data length of current data packet to be sent and the current data packet to be sent；Judge it is described currently to
Whether the data length for sending data packet is greater than preset length；If the data length of the current data packet to be sent is no more than pre-
If length, then the current data packet to be sent is sent to receiving end；When being sent, sent out into current data packet to be sent
End state is sent, the mobile unit obtains next data packet to be sent.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data packet to be sent
Data length be greater than preset length, the current data packet to be sent is divided into first frame and several successive frames；Described in transmission
The data length of first frame and the current data packet to be sent is to the receiving end；Judge whether to receive the receiving end hair
The first-class control frame sent, the first-class control frame include the first frame number upper limit and the first transmission time interval；If receiving
The first-class control frame successively sends the successive frame according to first transmission time interval.
Preferably, it is also realized when the computer-readable program is executed by processor: the successive frame that judgement has been sent
Quantity whether reach the first frame number upper limit；If the not up to described first frame number upper limit, sends the successive frame；If reaching
To the first frame number upper limit, then second control frame is received.
Preferably, it is also realized when the computer-readable program is executed by processor: if not receiving the first-class control
Frame processed then judges whether the time interval more than receiving stream control frame；If being more than the time interval of the receiving stream control frame,
Cancel the transmission of current data packet to be sent；If being less than the time interval of the receiving stream control frame, enter described current
Data packet to be sent sends end state.
Preferably, it is also realized when the computer-readable program is executed by processor: judging whether to reach first hair
Send time interval；If reaching, the successive frame is sent.
Preferably, it is also realized when the computer-readable program is executed by processor: receiving current data to be transmitted frame；Root
The frame type of the current data to be transmitted frame is judged according to the flag bit of the current data to be transmitted frame, it is described current to be transmitted
Data frame is a wherein frame for current data to be transmitted packet, and the frame type includes single frames, first frame, successive frame and flow control frame；
If the frame type of the current data to be transmitted frame is single frames, the current data to be transmitted frame is transmitted to data application end
End；It is described into the current data to be transmitted packet end of transmission state when the current data to be transmitted packet receives
Mobile unit transmits next data to be transmitted packet.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data to be transmitted frame
Frame type headed by frame, obtain the length of the current data to be transmitted packet；It sends third flow control frame to data and sends terminal,
The third flow control frame includes third receiving time interval and the third frame number upper limit；Transmit the current data to be transmitted frame extremely
The data application terminal；Enter the current data to be transmitted packet end of transmission when the first-class control frame is sent
State.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data to be transmitted frame
Frame type be successive frame, transmit the current data to be transmitted frame to the data application terminal；When described current to be transmitted
When data frame transfer finishes, judge whether the current data to be transmitted packet is transmitted；If not completing, received company is judged
Whether the quantity of continuous frame reaches the third frame number upper limit；If reaching the third frame number upper limit, the 4th flow control frame is sent；If not
Reach the third frame number upper limit, then enters the current data to be transmitted packet end of transmission state.
Preferably, it is also realized when the computer-readable program is executed by processor: if the current data to be transmitted frame
Frame type be flow control frame, according to the current data to be transmitted frame determine data packet to be sent the frame number upper limit and send when
Between be spaced.
Preferably, it is also realized when the computer-readable program is executed by processor: obtaining current data to be transmitted frame
Data message mark；Judge whether to meet present communication protocols according to data message mark；If meeting, executes and judge institute
The step of stating the frame type of current data to be transmitted frame；If not meeting, enter the current data to be transmitted packet end of transmission
State.
The method in mobile unit and previous embodiment in the present embodiment be based on the same inventive concept under two sides
Face is in front described in detail method implementation process, so those skilled in the art can be clear according to foregoing description
Understand to Chu the implementation process of the mobile unit in the present embodiment, in order to illustrate the succinct of book, details are not described herein again.
As seen through the above description of the embodiments, those skilled in the art can be understood that the application can
It realizes by means of software and necessary general hardware platform.Based on this understanding, the technical solution essence of the application
On in other words the part that contributes to existing technology can be embodied in the form of software products.The application further relates to one kind
Computer readable storage medium, such as ROM/RAM, magnetic disk, CD, are stored thereon with computer program, and computer program is located
Reason device realizes above-mentioned method when executing.
The transmission method and mobile unit of vehicle-mounted data provided by the present application, current channel, which calls, sends function transmission currently
After data frame to be sent, transmission function is exited, so that next channel, which is called, sends the next data frame of function transmission, thus
It realizes multiple channel parallel transmission, makes full use of hardware resource, improve data transfer efficiency.
Above embodiment is only the preferred embodiment of the application, and the range of the application protection cannot be limited with this,
The variation and replacement for any unsubstantiality that those skilled in the art is done on the basis of the application belong to the application institute
Claimed range.
Claims (11)
1. a kind of transmission method of vehicle-mounted data, it is applied to mobile unit, which is characterized in that the transmission method includes:
Obtain the data length of current data packet to be sent and the current data packet to be sent；
Judge whether the data length of the current data packet to be sent is greater than preset length；
If the data length of the current data packet to be sent is not more than preset length, the current data packet to be sent is sent
To receiving end；
When being sent, end state is sent into current data packet to be sent, the mobile unit obtains next pending
Send data packet.
2. the transmission method of vehicle-mounted data as described in claim 1, which is characterized in that described current to be sent in the judgement
Whether the data length of data packet is greater than after preset length, the method also includes:
If the data length of the current data packet to be sent is greater than preset length, the current data packet to be sent is divided into the
One frame and several successive frames；
The data length of the first frame and the current data packet to be sent is sent to the receiving end；
Judge whether to receive the first-class control frame that the receiving end is sent, the first-class control frame includes on the first frame number
Limit and the first transmission time interval；
If receiving the first-class control frame, the successive frame is successively sent according to first transmission time interval.
3. the transmission method of vehicle-mounted data as claimed in claim 2, which is characterized in that if receiving the first-class control
Frame, the method also includes:
Judge whether the quantity of the successive frame sent reaches the first frame number upper limit；
If the not up to described first frame number upper limit, sends the successive frame；
If reaching the first frame number upper limit, second control frame is received.
4. the transmission method of vehicle-mounted data as claimed in claim 2, which is characterized in that judging whether to receive the reception
After holding the first-class control frame sent, the method also includes:
If not receiving the first-class control frame, judge whether the time interval more than receiving stream control frame；
If being more than the time interval of the receiving stream control frame, cancel the transmission of current data packet to be sent；
If being less than the time interval of the receiving stream control frame, enters the current data packet to be sent and send end shape
State.
5. the transmission method of vehicle-mounted data as claimed in claim 2, which is characterized in that described according between first sending time
Every successively sending the successive frame, specifically include:
Judge whether to reach first transmission time interval；
If reaching, the successive frame is sent.
6. a kind of transmission method of vehicle-mounted data, it is applied to mobile unit, which is characterized in that the transmission method includes:
Receive current data to be transmitted frame；
The frame type of the current data to be transmitted frame is judged according to the flag bit of the current data to be transmitted frame, it is described current
Data to be transmitted frame is a wherein frame for current data to be transmitted packet, and the frame type includes single frames, first frame, successive frame and flow control
Frame processed；
If the frame type of the current data to be transmitted frame is single frames, the current data to be transmitted frame is transmitted to data application
Terminal；
When the current data to be transmitted packet receives, into the current data to be transmitted packet end of transmission state, institute
It states mobile unit and transmits next data to be transmitted packet.
7. the transmission method of vehicle-mounted data as claimed in claim 6, which is characterized in that described according to described current to be transmitted
After the flag bit of data frame judges the frame type of the current data to be transmitted frame, the method also includes:
If frame headed by the frame type of the current data to be transmitted frame, the length of the current data to be transmitted packet is obtained；
It sends third flow control frame to data and sends terminal, the third flow control frame includes third receiving time interval and third
The frame number upper limit；
The current data to be transmitted frame is transmitted to the data application terminal；
Enter the current data to be transmitted packet end of transmission state when the third flow control frame is sent.
8. the transmission method of vehicle-mounted data as claimed in claim 6, which is characterized in that described according to described current to be transmitted
After the flag bit of data frame judges the frame type of the current data to be transmitted frame, the method also includes:
If the frame type of the current data to be transmitted frame is successive frame, the current data to be transmitted frame is transmitted to the data
Application terminal；
When the current data to be transmitted frame end of transmission, judge whether the current data to be transmitted packet is transmitted；
If not completing, judge whether the quantity of received successive frame reaches the third frame number upper limit；
If reaching the third frame number upper limit, the 4th flow control frame is sent；
If the not up to described third frame number upper limit, enter the current data to be transmitted packet end of transmission state.
9. the transmission method of vehicle-mounted data as claimed in claim 6, which is characterized in that described according to described current to be transmitted
After the flag bit of data frame judges the frame type of the current data to be transmitted frame, the method also includes:
If the frame type of the current data to be transmitted frame is flow control frame, is determined and sent according to the current data to be transmitted frame
The frame number upper limit and transmission time interval of data packet.
10. the transmission method of vehicle-mounted data as claimed in claim 6, which is characterized in that receive current number to be transmitted described
After frame, the method also includes:
Obtain the data message mark of current data to be transmitted frame；
Judge whether to meet present communication protocols according to data message mark；
If meeting, the step of executing the frame type for judging the current data to be transmitted frame；
If not meeting, enter the current data to be transmitted packet end of transmission state.
11. a kind of mobile unit, which is characterized in that including processor and memory, being stored with computer in the memory can
Reader, the computer-readable program are configured to be executed by processor, and the computer-readable program is executed by processor
Method of the Shi Shixian as described in claim 1-10 any one.
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| CN201910204491.4A CN110086566B (en) | 2019-03-18 | 2019-03-18 | Vehicle-mounted data transmission method and vehicle-mounted equipment |
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