CN108881208A - Usb protocol switching method and device based on onboard system - Google Patents
Usb protocol switching method and device based on onboard system Download PDFInfo
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- CN108881208A CN108881208A CN201810594710.XA CN201810594710A CN108881208A CN 108881208 A CN108881208 A CN 108881208A CN 201810594710 A CN201810594710 A CN 201810594710A CN 108881208 A CN108881208 A CN 108881208A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/08—Protocols for interworking; Protocol conversion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
- H04L43/0823—Errors, e.g. transmission errors
- H04L43/0829—Packet loss
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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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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Environmental & Geological Engineering (AREA)
- Computer Security & Cryptography (AREA)
- Health & Medical Sciences (AREA)
- Computing Systems (AREA)
- General Health & Medical Sciences (AREA)
- Medical Informatics (AREA)
- Information Transfer Systems (AREA)
- Communication Control (AREA)
Abstract
The present invention relates to automobile technical field, in particular to a kind of usb protocol switching method and device based on onboard system.The method includes：Data are transmitted using the second usb protocol；Inspection data whether there is packet loss；If examining, to data, there are packet losses, and second usb protocol is switched to the first usb protocol；Data are transmitted using first usb protocol.Data are transmitted using the second usb protocol, inspection data whether there is packet loss, packet loss if it exists, the second usb protocol is then switched to the first usb protocol, after the handover, transmits data using the first usb protocol, it aims to solve the problem that in existing onboard system, data are transmitted using USB2.0 transmission data or using USB1.1, thus the problem of good balance cannot be reached in terms of data transmission rate and stability.
Description
Technical field
The present invention relates to automobile technical field, in particular to a kind of usb protocol switching method and dress based on onboard system
It sets.
Background technique
In-vehicle multi-media system can all retain USB interface substantially, play the audio or view inside USB flash disk to facilitate car owner
Frequently.But with the extensive use of intelligent vehicle-carried android system, USB interface is also more and more other than being used to connect USB flash disk
It is used to the equipment such as connection USB recorder, USB tire pressure, USB vehicle backing backsight, USB air purifier.USB device more than so is all
For carry on onboard system, the stability that data are transmitted to it just has higher requirement.USB2.0 (high speed) transmission
Rate height but limited transmission distance, and transmission cable is required also high.USB1.1 (full speed) transmission rate is low but transmits
Stablize.On existing onboard system be typically all use USB 2.0 or USB1.1, or allow user enter setting menu into
Row selection, comes into force after then restarting system.
Summary of the invention
In view of the shortcomings of the prior art, the present invention proposes a kind of usb protocol switching method and device based on onboard system,
When using the second USB transmission data, inspection data whether there is packet loss, if so, the second usb protocol is switched to the first USB association
View, it is intended to it solves to transmit data in existing onboard system or using USB2.0 transmission data or using USB1.1, from
And the problem of good balance cannot be reached in terms of data transmission rate and stability.
Technical solution proposed by the present invention is：
A kind of usb protocol switching method based on onboard system, the method includes：
Data are transmitted using the second usb protocol；
Inspection data whether there is packet loss；
If examining, to data, there are packet losses, and second usb protocol is switched to the first usb protocol；
Data are transmitted using first usb protocol.
Further, in described the step of transmitting data using the second usb protocol, including：
When USB device is inserted into onboard system, default transmits the data of the USB device using the second usb protocol.
Further, in described the step of transmitting data using the second usb protocol, including：
When USB device is inserted into onboard system, the data volume of the USB device is detected；
If data volume is more than or equal to the first preset threshold, the number of the USB device is transmitted using the second usb protocol
According to.
Further, after the step of inspection data whether there is packet loss, the method also includes：
If examining to data and packet loss being not present, the second usb protocol transmission data are continued to use.
Further, if there are packet losses to data in the inspection, second usb protocol is switched to the first USB
In the step of agreement, including：
If examining, to data, there are packet losses, detect packet loss；
If packet loss is more than or equal to the second preset threshold, the second usb protocol is switched to the first usb protocol.
The usb protocol switching device based on onboard system that the present invention also provides a kind of, described device include：
Second transmission module, for transmitting data using the second usb protocol；
Inspection module whether there is packet loss for inspection data；
Second usb protocol is switched to the first USB association if there are packet losses for inspection to data by switching module
View；
First transmission module, for transmitting data using first usb protocol.
Further, second transmission module includes：
Second sub- transmission module, for when USB device is inserted into onboard system, default to transmit institute using the second usb protocol
State the data of USB device.
Further, second transmission module includes：
Second sub- detection module, for detecting the data volume of the USB device when USB device is inserted into onboard system；
The sub- transmission module of third uses the second usb protocol if being more than or equal to the first preset threshold for data volume
Transmit the data of the USB device.
Further, described device further includes：
Processing module continues to use the second usb protocol transmission number if packet loss is not present for examining to data
According to.
Further, the switching module includes：
4th sub- detection module detects packet loss if there are packet losses to data for inspection；
4th sub- switching module cuts the second usb protocol if being more than or equal to the second preset threshold for packet loss
It is changed to the first usb protocol.
According to above-mentioned technical solution, beneficial effect of the present invention：Data are transmitted using the second usb protocol, inspection data is
No there are packet losses, and packet loss, then be switched to the first usb protocol for the second usb protocol if it exists, after the handover, uses the first USB
Agreement transmits data, it is intended to solve to transmit data in existing onboard system or using USB2.0 or be passed using USB1.1
Transmission of data, thus the problem of good balance cannot be reached in terms of data transmission rate and stability.
Detailed description of the invention
Fig. 1 is the flow chart using the usb protocol switching method provided in an embodiment of the present invention based on onboard system；
Fig. 2 is the functional block diagram using the usb protocol switching device provided in an embodiment of the present invention based on onboard system.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in Figure 1, the embodiment of the present invention proposes a kind of usb protocol switching method based on onboard system, the method
Include the following steps：
Step S101, data are transmitted using the second usb protocol.
Use the data of the second usb protocol transmission USB device.
In the present embodiment, it is greater than using the transmission speed of the second usb protocol transmission data and is transmitted using the first usb protocol
The transmission speed of data is greater than using the transmission stability of the first usb protocol transmission data and transmits data using the second usb protocol
Transmission stability, specifically, the second usb protocol be USB2.0 agreement, the first usb protocol be USB1.1 agreement.USB2.0 association
The theoretical value of view is 480Mbps, and the theoretical value of USB1.1 agreement is 12Mbps.
In the present embodiment, in step s101, including：
When USB device is inserted into onboard system, default transmits the data of the USB device using the second usb protocol.
When USB device is inserted into onboard system, USB device is not detected, is all that default uses the second usb protocol
Transmit the data of USB device.
Further, when USB device be inserted into onboard system when, detect USB device type, obtain USB device type it
Afterwards, default is using the data of the second usb protocol transmission USB device, and wherein USB device type includes mass-memory unit, USB
Camera device, human-computer interaction device, audio frequency apparatus and low capacity store equipment.
Further, when USB device is inserted into onboard system, the transmission speed of USB device is detected, if detecting USB device
Transmission speed be less than third predetermined threshold value, then be switched to the first usb protocol transmission USB device data.
In some embodiments, in step s101, including：
When USB device is inserted into onboard system, the data volume of the USB device is detected；
If data volume is more than or equal to the first preset threshold, the number of the USB device is transmitted using the second usb protocol
According to.
When USB device is inserted into onboard system, USB device is detected, the data volume of USB device is detected, that is,
The data volume that detection USB device needs to transmit.In the present embodiment, the first preset threshold of setting judges data volume, if
Data volume is more than or equal to the first preset threshold, it is believed that USB device is mass-memory unit, is needed big using transmission speed
The second usb protocol, then using the second usb protocol transmission USB device data.
If data volume transmits the data of the USB device using the first usb protocol less than the first preset threshold.If number
According to amount less than the first preset threshold, it is believed that USB device be low capacity storage equipment, can be used transmission speed it is smaller and transmit
The first high usb protocol of stability, then using the data of the first usb protocol transmission USB device.
Step S102, inspection data whether there is packet loss.
When using the second usb protocol transmission data, needs inspection data with the presence or absence of packet loss, assisted using the first USB
When view transmission data, inspection data is not needed with the presence or absence of packet loss.
After step s 102, the method includes：
If examining to data and packet loss being not present, the second usb protocol transmission data are continued to use.
If examining to data and packet loss being not present, it is believed that the transmission of the second usb protocol is stablized, do not need it is slow using transmission speed and
The first high usb protocol of transmission stability then continues to use the second usb protocol transmission data.
If step S103, examining, to data, there are packet losses, and second usb protocol is switched to the first usb protocol.
If examining, to data, there are packet losses, it is believed that the transmission of the second usb protocol is unstable, needs using transmission stable first
Second usb protocol is then switched to the first usb protocol by usb protocol.
Further, in step s 103, including：
If examining, to data, there are packet losses, detect packet loss；
If packet loss is more than or equal to the second preset threshold, the second usb protocol is switched to the first usb protocol.
If examining, to data, there are packet losses, detect to packet loss, and the second preset threshold of setting and packet loss carry out
Compare, if packet loss is more than or equal to the second preset threshold, it is believed that tighter using the second usb protocol transmission data packetloss
Weight is no longer appropriate for transmitting data using the second usb protocol, then the second usb protocol is switched to the first usb protocol, uses first
Usb protocol transmits data.
If packet loss continues to use the second usb protocol transmission data less than the second preset threshold.If packet loss is less than
Two preset thresholds, it is believed that it is fewer using the second usb protocol transmission data packetloss, then continue to use the second usb protocol transmission number
According to.
Step S104, data are transmitted using first usb protocol.
After the second usb protocol is switched to the first usb protocol, data, the first USB are transmitted using the first usb protocol
It is high that agreement transmits data stability.
In conclusion transmitting data using the second usb protocol, inspection data whether there is packet loss, if it exists packet loss, then will
Second usb protocol is switched to the first usb protocol, after the handover, transmits data using the first usb protocol, it is intended to solve existing
Onboard system in or using USB2.0 transmission data or using USB1.1 transmit data, thus in data transmission rate and
The problem of good balance cannot be reached in terms of stability.
As shown in Fig. 2, the embodiment of the present invention proposes a kind of usb protocol switching device based on onboard system, device 1 includes
Second transmission module 11, inspection module 12, switching module 13 and the first transmission module 14.
Second transmission module 11, for transmitting data using the second usb protocol.
Use the data of the second usb protocol transmission USB device.
In the present embodiment, it is greater than using the transmission speed of the second usb protocol transmission data and is transmitted using the first usb protocol
The transmission speed of data is greater than using the transmission stability of the first usb protocol transmission data and transmits data using the second usb protocol
Transmission stability, specifically, the second usb protocol be USB2.0 agreement, the first usb protocol be USB1.1 agreement.USB2.0 association
The theoretical value of view is 480Mbps, and the theoretical value of USB1.1 agreement is 12Mbps.
In the present embodiment, the second transmission module 11 includes：
Second sub- transmission module, for when USB device is inserted into onboard system, default to transmit institute using the second usb protocol
State the data of USB device.
When USB device is inserted into onboard system, USB device is not detected, is all that default uses the second usb protocol
Transmit the data of USB device.
Further, when USB device be inserted into onboard system when, detect USB device type, obtain USB device type it
Afterwards, default is using the data of the second usb protocol transmission USB device, and wherein USB device type includes mass-memory unit, USB
Camera device, human-computer interaction device, audio frequency apparatus and low capacity store equipment.
Further, when USB device is inserted into onboard system, the transmission speed of USB device is detected, if detecting USB device
Transmission speed be less than third predetermined threshold value, then be switched to the first usb protocol transmission USB device data.
In some embodiments, the second transmission module 11 includes：
Second sub- detection module, for detecting the data volume of the USB device when USB device is inserted into onboard system；
The sub- transmission module of third uses the second usb protocol if being more than or equal to the first preset threshold for data volume
Transmit the data of the USB device.
When USB device is inserted into onboard system, USB device is detected, the data volume of USB device is detected, that is,
The data volume that detection USB device needs to transmit.In the present embodiment, the first preset threshold of setting judges data volume, if
Data volume is more than or equal to the first preset threshold, it is believed that USB device is mass-memory unit, is needed big using transmission speed
The second usb protocol, then using the second usb protocol transmission USB device data.
If data volume transmits the data of the USB device using the first usb protocol less than the first preset threshold.If number
According to amount less than the first preset threshold, it is believed that USB device be low capacity storage equipment, can be used transmission speed it is smaller and transmit
The first high usb protocol of stability, then using the data of the first usb protocol transmission USB device.
Inspection module 12 whether there is packet loss for inspection data.
When using the second usb protocol transmission data, needs inspection data with the presence or absence of packet loss, assisted using the first USB
When view transmission data, inspection data is not needed with the presence or absence of packet loss.
Device further includes：
Processing module continues to use the second usb protocol transmission number if packet loss is not present for examining to data
According to.
If examining to data and packet loss being not present, it is believed that the transmission of the second usb protocol is stablized, do not need it is slow using transmission speed and
The first high usb protocol of transmission stability then continues to use the second usb protocol transmission data.
Second usb protocol is switched to the first USB if there are packet losses to data for inspection by switching module 13
Agreement.
If examining, to data, there are packet losses, it is believed that the transmission of the second usb protocol is unstable, needs using transmission stable first
Second usb protocol is then switched to the first usb protocol by usb protocol.
Further, switching module 13 includes：
4th sub- detection module detects packet loss if there are packet losses to data for inspection；
4th sub- switching module cuts the second usb protocol if being more than or equal to the second preset threshold for packet loss
It is changed to the first usb protocol.
If examining, to data, there are packet losses, detect to packet loss, and the second preset threshold of setting and packet loss carry out
Compare, if packet loss is more than or equal to the second preset threshold, it is believed that tighter using the second usb protocol transmission data packetloss
Weight is no longer appropriate for transmitting data using the second usb protocol, then the second usb protocol is switched to the first usb protocol, uses first
Usb protocol transmits data.
If packet loss continues to use the second usb protocol transmission data less than the second preset threshold.If packet loss is less than
Two preset thresholds, it is believed that it is fewer using the second usb protocol transmission data packetloss, then continue to use the second usb protocol transmission number
According to.
First transmission module 14, for transmitting data using first usb protocol.
After the second usb protocol is switched to the first usb protocol, data, the first USB are transmitted using the first usb protocol
It is high that agreement transmits data stability.
In conclusion transmitting data using the second usb protocol, inspection data whether there is packet loss, if it exists packet loss, then will
Second usb protocol is switched to the first usb protocol, after the handover, transmits data using the first usb protocol, it is intended to solve existing
Onboard system in or using USB2.0 transmission data or using USB1.1 transmit data, thus in data transmission rate and
The problem of good balance cannot be reached in terms of stability.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of usb protocol switching method based on onboard system, which is characterized in that the method includes：
Data are transmitted using the second usb protocol；
Inspection data whether there is packet loss；
If examining, to data, there are packet losses, and second usb protocol is switched to the first usb protocol；
Data are transmitted using first usb protocol.
2. the usb protocol switching method according to claim 1 based on onboard system, which is characterized in that in the use
Second usb protocol transmitted in the step of data, including：
When USB device is inserted into onboard system, default transmits the data of the USB device using the second usb protocol.
3. the usb protocol switching method according to claim 1 based on onboard system, which is characterized in that in the use
Second usb protocol transmitted in the step of data, including：
When USB device is inserted into onboard system, the data volume of the USB device is detected；
If data volume is more than or equal to the first preset threshold, the data of the USB device are transmitted using the second usb protocol.
4. the usb protocol switching method according to claim 1 based on onboard system, which is characterized in that in the inspection
After data whether there is the step of packet loss, the method also includes：
If examining to data and packet loss being not present, the second usb protocol transmission data are continued to use.
5. the usb protocol switching method according to claim 1 based on onboard system, which is characterized in that if in the inspection
In the step of testing data, there are packet losses, then second usb protocol are switched to the first usb protocol, including：
If examining, to data, there are packet losses, detect packet loss；
If packet loss is more than or equal to the second preset threshold, the second usb protocol is switched to the first usb protocol.
6. a kind of usb protocol switching device based on onboard system, which is characterized in that described device includes：
Second transmission module, for transmitting data using the second usb protocol；
Inspection module whether there is packet loss for inspection data；
Second usb protocol is switched to the first usb protocol if there are packet losses to data for inspection by switching module；
First transmission module, for transmitting data using first usb protocol.
7. the usb protocol switching device according to claim 6 based on onboard system, which is characterized in that described second passes
Defeated module includes：
Second sub- transmission module, for when USB device is inserted into onboard system, default to transmit the USB using the second usb protocol
The data of equipment.
8. the usb protocol switching device according to claim 6 based on onboard system, which is characterized in that described second passes
Defeated module includes：
Second sub- detection module, for detecting the data volume of the USB device when USB device is inserted into onboard system；
The sub- transmission module of third is transmitted if being more than or equal to the first preset threshold for data volume using the second usb protocol
The data of the USB device.
9. the usb protocol switching device according to claim 6 based on onboard system, which is characterized in that described device is also
Including：
Processing module continues to use the second usb protocol transmission data if packet loss is not present for examining to data.
10. the usb protocol switching device according to claim 6 based on onboard system, which is characterized in that the switching mould
Block includes：
4th sub- detection module detects packet loss if there are packet losses to data for inspection；
Second usb protocol is switched to by the 4th sub- switching module if being more than or equal to the second preset threshold for packet loss
First usb protocol.
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