CN102164262B - USB (universal serial bus) data wireless transmission method - Google Patents
USB (universal serial bus) data wireless transmission method Download PDFInfo
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- CN102164262B CN102164262B CN201110048820A CN201110048820A CN102164262B CN 102164262 B CN102164262 B CN 102164262B CN 201110048820 A CN201110048820 A CN 201110048820A CN 201110048820 A CN201110048820 A CN 201110048820A CN 102164262 B CN102164262 B CN 102164262B
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Abstract
The invention discloses a USB (universal serial bus) data wireless transmission method which comprises the following steps: S1, when USB equipment is connected to a WHDI (wireless high definition interface) receiver, the receiver connects the USB equipment to a host with a USB HOST function through a transmitter, wherein the receiver has a USB HOST function, and the transmitter has a USBDEV function; S2, the receiver and transmitter transmit the data interacted between the host and the USB equipment through a WHDI transmission channel; and S3, after the data transmission is over, the USB equipment cuts off connection with the WHDI receiver. Through the invention, the limitation of connecting the transmitter by use of remote control of the receiver by the user caused by different equipment manufacturers is overcome, and the receiver interacts with the host better.
Description
Technical field
The present invention relates to radio transmission technical field, particularly a kind of usb data radio transmitting method.
Background technology
So far; (Wireless High Definition Interface WHDI) with the radio wave is media, the channel that adopts 5GHz must not authorize in the WirelessHD system; 1080P (not having compression) high definition resolution signal and stereophonic signal are transmitted 30 meters scope; And can easily penetrate the obstruct of wall, and HDMI video transmission time-delay is controlled in 1 millisecond, make home audio-visual center and the multimedia conferencing center of demonstrating easily set up.The connection configuration of equipment is very simple; Be equipped with reflector and receiver; All information sources are sent full HD format video and binary channels form stereo audio; Subsidiary remote controller can choose at random the input channel circuit, and supports multiplex infrared remote control retransmission function, the main frame that is suitable for high definition projector, blue-ray DVD, HTPC, high definition STB, XBOX360, PS3, WII and has audio/video output.Receiver can connect HID equipment (as: keyboard, mouse and touch-screen), and receiver returns to reflector through WHDI after receiving the data that equipment sends again, and reflector feeds back to main frame with control information again, thus main control system.
Yet; Above-mentioned prior receivers connects the mode of HID equipment; Following problem is arranged: the feedback data of distinct device manufacturer possibly vary, and receiver just can't be supported the equipment of all manufacturers, has caused the user to use the receiver Long-distance Control to connect the limitation of the main frame of reflector like this.
Summary of the invention
The technical problem that (one) will solve
The technical problem that the present invention will solve is: how to overcome the limitation that the receiver Long-distance Control connects the main frame of reflector, make that receiver can be interactive better with this main frame.
(2) technical scheme
For solving the problems of the technologies described above, the invention provides a kind of usb data radio transmitting method, may further comprise the steps:
S1: when USB device is connected to the WHDI of WirelessHD system receiver; Said receiver is connected to said USB device in the main frame with USB HOST function through reflector; Said receiver has USB HOST function, and said reflector has USB DEV function;
S2: receiver and reflector are through WHDI transmission channel main frame and the mutual data of USB device;
S3: after transfer of data was accomplished, the USB device disconnection was connected with the WHDI receiver.
Wherein, said step S1 specifically comprises:
Said receiver sends the order in the USB connection to reflector;
Transmitter receipt is connected to said main frame to said order back through enabling USB functional simulation USB device.
Wherein, said step S2.
The usb data that the USB HOST of receiver is received is stored in cyclic buffer;
In the interval of transmission two width of cloth picture frames, concentrate again usb data is sent to reflector.
Wherein, said step S3 specifically comprises:
Said receiver sends the order that USB breaks off to reflector;
Transmitter receipt breaks off through forbidding USB functional simulation USB device and said main frame to said order back.
(3) beneficial effect
The receiver control connection of the present invention through WHDI technology the main frame that has USB HOST function based on the reflector of WHDI technology; Overcome because the user that distinct device manufacturer causes uses the receiver Long-distance Control to connect the limitation of the main frame of reflector, and made receiver interactive with this main frame better.
Description of drawings
Fig. 1 is a kind of usb data radio transmitting method flow chart of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment, specific embodiments of the invention describes in further detail.Following examples are used to explain the present invention, but are not used for limiting scope of the present invention.
WHDI receiver among the present invention has USB HOST function, and reflector has USB DEV function.Unique " root " is arranged in the topological structure of usb bus; This root is exactly USB HOST (usb host); All USB devices through USB HUB or directly and USB HOST couple together, the USB device here is exactly USB DEV, the chip USB interface that has can only use as usb host; The chip USB interface that has can only be used as USB device and use thus that receiver must have USB HOST function, and reflector must have USB DEV function.If the interface of any USB device just physically couples together with usb host; If but the register of usb segment is not opened and set to software; This USB interface can not replied any inquiry on the usb bus and feed back any data that this just is appreciated that to USB interface has been under an embargo so, otherwise then for enabling.As shown in Figure 1, a kind of usb data radio transmitting method flow chart for the embodiment of the invention comprises:
Step S101, when USB device was connected to the WHDI of WirelessHD system receiver, said receiver was connected to said USB device in the main frame with USB HOST function through reflector.Receiver has USB HOST function, and when USB device inserted, the USB interface chip changed the generation hardware interrupts according to bus level, informs that usb host has new equipment to be connected on the usb bus.Detect the process of new equipment insertion and in WHDI, send the order realization that has USB device to connect to reflector with receiver.Transmitter receipt, is promptly simulated USB device and is connected to said main frame through enabling the connection status of USB functional simulation USB device to said order back.
Step S102, receiver and reflector are through WHDI transmission channel main frame and the mutual data of USB device.When the usb host equipment that recognized of reflector connection connects; Beginning to send control data through the acquiescence pipeline comes requirement equipment to respond information such as device descriptor; This type data are called as the setup bag, and the data of communicating by letter on the usb bus have handshake packet, token packet and packet etc.Token packet is used for usb host is confirmed needs communication before each transmission USB device, and this process is generally accomplished by the USB interface chip automatically, does not need special processing.Handshake packet is used to confirm that the type of usb communication is input and output or is provided with that this process also can be accomplished by the USB interface chip automatically.So what unique needs were handled is packet; The IN data that no matter are reflector to the OUT data of receiver or receiver to reflector; All can be by the WHDI transmission channel; So just can simulate a simple USB wireless bus, in the WHDI environment, just can connect the USB control appliance of all manufacturers, carry out the interaction of host computer control and main frame.Because the groundwork of the wireless channel of WHDI is full HD video and a voice data of transmission; If 60HZ transmits video data, the time of the image of each frame demonstration is about 16.7ms so, because very big each two field picture of the data volume of 1080P has 15ms to be used to transmit the view data of next frame approximately; Can only be between the two frames vacant time transmission of usb data; And the communication frequency of USB is higher than the frequency of frame period, and general interruption transmission is approximately 10ms once even faster, and data conditions very likely appears losing in usb data because have no chance to send so; To this situation; The usb data that can the USBHOST of receiver be received is stored in a circular buffering, in the interval of two width of cloth images, concentrates then usb data is sent to reflector again, can avoid the problem of usb data possibility packet loss like this.
Step S103, after transfer of data was accomplished, the USB device disconnection was connected with the WHDI receiver.Similar when being connected with USB, receiver sends the order that USB breaks off to reflector; Transmitter receipt, is promptly simulated USB device and is connected with said main frame disconnection through forbidding the state that removes of USB functional simulation USB device to said order back.
Above execution mode only is used to explain the present invention; And be not limitation of the present invention; The those of ordinary skill in relevant technologies field under the situation that does not break away from the spirit and scope of the present invention, can also be made various variations and modification; Therefore all technical schemes that are equal to also belong to category of the present invention, and scope of patent protection of the present invention should be defined by the claims.
Claims (3)
1. a usb data radio transmitting method is characterized in that, may further comprise the steps:
S1: when USB device is connected to the WHDI of WirelessHD system receiver; Said receiver is connected to said USB device in the main frame with USB HOST function through reflector; Said receiver has USB HOST function, and said reflector has USB DEV function;
S2: receiver and reflector specifically comprise through WHDI transmission channel main frame and the mutual data of USB device:
The usb data that the USB HOST of receiver is received is stored in cyclic buffer;
In the interval of transmission two width of cloth picture frames, concentrate again usb data is sent to reflector;
S3: after transfer of data was accomplished, the USB device disconnection was connected with the WHDI receiver.
2. usb data radio transmitting method as claimed in claim 1 is characterized in that, said step S1 specifically comprises:
Said receiver sends the order in the USB connection to reflector;
Transmitter receipt is connected to said main frame to said order back through enabling USB functional simulation USB device.
3. usb data radio transmitting method as claimed in claim 1 is characterized in that, said step S3 specifically comprises:
Said receiver sends the order that USB breaks off to reflector;
Transmitter receipt breaks off through forbidding USB functional simulation USB device and said main frame to said order back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110048820A CN102164262B (en) | 2011-03-01 | 2011-03-01 | USB (universal serial bus) data wireless transmission method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110048820A CN102164262B (en) | 2011-03-01 | 2011-03-01 | USB (universal serial bus) data wireless transmission method |
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| Publication Number | Publication Date |
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| CN102164262A CN102164262A (en) | 2011-08-24 |
| CN102164262B true CN102164262B (en) | 2012-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110048820A Expired - Fee Related CN102164262B (en) | 2011-03-01 | 2011-03-01 | USB (universal serial bus) data wireless transmission method |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102568187A (en) * | 2011-12-20 | 2012-07-11 | 世盟科信（北京）国际科技发展有限公司 | Remote controller page turning method based on WHDI |
| CN105979309A (en) * | 2015-11-13 | 2016-09-28 | 乐视移动智能信息技术（北京）有限公司 | Method and device for detection of shielded wireless high-definition data projection channel |
| CN110278089A (en) * | 2019-06-17 | 2019-09-24 | 厦门亿联网络技术股份有限公司 | A kind of wireless session control system and control method and business method based on virtual USB device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394490A (en) * | 2007-09-20 | 2009-03-25 | 厦门华侨电子股份有限公司 | Non-compressed transmitting and receiving integrated display device for wireless digital high resolution audio and video signal |
| US20090103470A1 (en) * | 2007-10-18 | 2009-04-23 | Candelore Brant L | Revocation management |
| CN101888496A (en) * | 2010-06-25 | 2010-11-17 | 深圳市高斯贝尔家居智能电子有限公司 | Wireless high definition module, and transmitting module and receiving module thereof |
| CN101902238A (en) * | 2010-07-22 | 2010-12-01 | 成都九洲迪飞科技有限责任公司 | USB wireless extension system |
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2011
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394490A (en) * | 2007-09-20 | 2009-03-25 | 厦门华侨电子股份有限公司 | Non-compressed transmitting and receiving integrated display device for wireless digital high resolution audio and video signal |
| US20090103470A1 (en) * | 2007-10-18 | 2009-04-23 | Candelore Brant L | Revocation management |
| CN101888496A (en) * | 2010-06-25 | 2010-11-17 | 深圳市高斯贝尔家居智能电子有限公司 | Wireless high definition module, and transmitting module and receiving module thereof |
| CN101902238A (en) * | 2010-07-22 | 2010-12-01 | 成都九洲迪飞科技有限责任公司 | USB wireless extension system |
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| CN102164262A (en) | 2011-08-24 |
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Granted publication date: 20121024 Termination date: 20130301 |