CN102368231A - Method and system for redirecting USB (universal serial bus) devices - Google Patents
Method and system for redirecting USB (universal serial bus) devices Download PDFInfo
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- CN102368231A CN102368231A CN2011103113084A CN201110311308A CN102368231A CN 102368231 A CN102368231 A CN 102368231A CN 2011103113084 A CN2011103113084 A CN 2011103113084A CN 201110311308 A CN201110311308 A CN 201110311308A CN 102368231 A CN102368231 A CN 102368231A
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Abstract
The invention provides a method and a system for redirecting USB (universal serial bus) devices, wherein the method comprises the following steps that: a: a cloud terminal carries out initialization operation on the redirection of a USB device; b: a virtualization bus intercepts an I/O (input/output) request and operation (for redirecting the USB device to the cloud terminal) of a user to a virtual device; c: a terminal controller processes the received redirection I/O request and operation, and returns the processing results to the virtualization bus; and d: after carrying out analysis processing on the processing results returned by the cloud terminal, the virtualization bus returns the obtained analysis results to an operating system, then the operating system feeds back the analysis results to a user experience layer finally according to the I/O processing results fed back by the virtualization bus. The method and system provided by the invention are better in universality, more in supported device type, good in compatibility, flexible and convenient.
Description
Technical field
The present invention relates to the device redirection technical field, relate in particular to the method and system that a kind of USB device is redirected.
Background technology
The USB device redirecting technique is mainly given the use ability that peripheral hardware on the cloud terminal is provided based on the end-to-end access of desktop virtual environment, makes the user experience of desktop virtual environment more complete, more approaches the user experience on traditional personal desktop.The USB device redirecting technique adopts end-to-end computation model; Through network (LAN, wide area network) I/O of peripheral hardware on terminal service is mapped to the virtual desktop end intactly, pellucidly; And set up and the robotization of behaviors such as disconnection through realizing shining upon, provide convenience, peripheral hardware use-pattern flexibly with the synchronous mechanism of virtual desktop session.
But there is following problem in the prior USB device redirection:
A, versatility are poor
Conventional art depends on privately owned virtual desktop agreement, because different desktop virtual software possibly adopt different proprietary protocols, is difficult to realize the compatibility of different desktop virtual softwares.
The device type of B, support is limited
Conventional art, is all selected usually only to support data transfer throughput small device type, and all can be limited usually for high amount of traffic amount equipment such as video, audio frequency for the fluency of desktop experience owing to take the passage of privately owned desktop protocol.
C, compatibility of apparatus are poor
Conventional art is facultative bad to equipment, and the device type of not only supporting is limited, even in the limited type of supporting, to the compatibility of the equipment of different brands and model also instability.
The use-pattern of D, peripheral hardware is dumb
Lack the sound mechanism of a cover to management and control that dissimilar equipment shine upon, make the use-pattern of equipment lack dirigibility.
Summary of the invention
The method and system that the object of the present invention is to provide a kind of USB device to be redirected.
The objective of the invention is to realize through following technical scheme.
The method that a kind of USB device is redirected comprises step:
A: cloud terminal USB device is redirected initialization operation;
B: virtual bus interception user is redirected to the cloud terminal to the I/O request and the operation of virtual unit;
C: terminal control unit is handled redirected I/O request and the operation that receives, and result is returned to virtual bus;
D: the result that virtual bus is returned the cloud terminal returns to operating system after analyzing and processing; Operating system finally feeds back to the user experience layer according to the I/O result of virtual bus feedback.
Preferably, also comprise before the step a: start virtual bus and on the cloud terminal, start terminal control unit at the virtual desktop end.
Preferably, the said initialization operation of step a specifically comprises:
A1: the user opens the virtual desktop session and lands virtual desktop;
A2: terminal control unit reads in user's configuration and switches USB device to mapped mode;
A3: virtual scan bus cloud terminal USB device, according to the USB device information creating virtual equipment that obtains;
A4: open of the end-to-end mapping of cloud terminal USB device, accomplish the initialization procedure that cloud terminal USB device I/O serves the virtual desktop mapping to virtual desktop.
Preferably, also comprise after the steps d: the user finishes the virtual desktop session and breaks off virtual desktop, and virtual bus discharges virtual unit, finishes device map; Terminal control unit is redirected USB device once more and drives, and makes USB device get into local mode.
Preferably, said redirected USB device drives and specifically refers to remove the function driver of operating system to the USB device binding, and binds new function and be driven on the USB device.
Preferably, comprise that also when new USB device adds the cloud terminal, terminal control unit will be controlled new USB device and get into mapped mode, and the notice virtual bus is opened a new device map.
Preferably, comprise that also if current USB device is arranged when the cloud terminal removes, the cloud terminal assembly can notify virtual bus to discharge invalid mapping.
A kind of USB device Redirectional system comprises: cloud terminal, network router/hub and virtual desktop, cloud terminal are set up data communication through network router/hub and virtual desktop and are connected;
The cloud terminal comprises terminal control unit, is used to control peripheral hardware, accomplishes transmission, reception and the processing operation of control information and data message;
Virtual desktop comprises virtual bus, is used to create virtual equipment, and the intercepting user accomplishes the transmission of equipment I/O operation to the cloud terminal to the I/O operation of equipment, and the I/O operating result that the cloud terminal is returned is analyzed and handled.
Preferably, also comprise gateway server, be used to realize data forwarding, the wide area network access operation is provided.
Preferably, also comprise configuration server, be used to manage concentratedly the user and dispose list, accomplish the mapping management of USB device on the cloud terminal through blacklist and white list mode.
The present invention compared with prior art has the following advantages:
A, enhancing versatility
Adopt publicly-owned agreement ICP/IP protocol to carry out data transmission; Separate with privately owned desktop protocol; Support all virtual desktop software in theory,, remedy the shortcoming of conventional art versatility difference for all virtual desktop systems provide a kind of general, unified end-to-end equipment operational version.
The kind of b, expansion support equipment type
Because the USB device redirecting technique separates with privately owned desktop protocol; Adopt the autonomous channel; Therefore can not influence the fluency of desktop, can support to comprise all devices type of high amount of traffic amount equipment such as audio frequency, video, solve the restriction of conventional art on device type.
C, raising equipment compatibility
Go deep into the operating system nucleus layer, to analysis at all levels, control and the optimization of device drives, revise its default behavior in case of necessity and improve compatibility of apparatus, solve the problem of conventional art equipment compatibility difference.
D, add the flexibility ratio of large equipment use-pattern
Add to device type mapping management mechanism; Create the mapping management ability that the configuration list is accomplished equipment on the cloud terminal to the user; Create the mapping blacklist, create the mapping white list to device type to the peculiar indications of equipment; Opertaing device shines upon to greatest extent, remedies the deficiency of conventional art.
Description of drawings
Fig. 1 is a USB device Redirectional system theory diagram of the present invention;
Fig. 2 is a USB device reorientation method process flow diagram of the present invention;
Fig. 3 is that USB device is redirected initialization flowchart.
Embodiment
In order to make the object of the invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
See also shown in Figure 1; USB device Redirectional system theory diagram of the present invention; Comprise: cloud terminal, network router/hub, gateway server, virtual desktop and configuration server; The cloud terminal is set up data communication through network router/hub through gateway server and virtual desktop and is connected, and virtual desktop is set up data interaction through configuration server through network router/hub and cloud terminal.
The cloud terminal comprises terminal control unit, is used to control peripheral hardware, accomplishes the operations such as transmission, reception and processing of control information and data message.
Virtual desktop comprises application program, user and virtual bus; The virtual desktop end is created virtual unit through virtual bus; The intercepting user accomplishes the transmission of equipment I/O operation to the cloud terminal to the I/O operation of equipment, and the I/O operating result that the cloud terminal is returned is analyzed and handled.
Gateway server is used to realize data forwarding, and the wide area network access capability is provided, and breaks through the LAN restriction.
Configuration server is used to manage concentratedly the user and disposes list, accomplishes the mapping management ability of USB device on the cloud terminal through modes such as blacklist and white lists.
See also shown in Figure 2ly, USB device reorientation method process flow diagram of the present invention comprises:
Step 201: start virtual bus at the virtual desktop end, the I/O that is used to create virtual equipment and shines upon equipment on the cloud terminal serves the virtual desktop end;
Step 202: cloud starts terminal control unit on the terminal, current USB device and keep watch on the adding of new USB device and the deletion of current USB device etc. on the control cloud terminal;
Step 203: cloud terminal USB device is redirected initialization operation, and is concrete, consults shown in Figure 3ly, comprising:
Step 301: the user opens the virtual desktop session and lands virtual desktop;
Step 302: terminal control unit reads in user's configuration and switches USB device to mapped mode;
Step 303: virtual scan bus cloud terminal USB device, create virtual equipment according to the USB device information transparency ground that obtains;
Step 304: open of the end-to-end mapping of cloud terminal USB device, accomplish the initialization procedure that cloud terminal USB device I/O serves the virtual desktop mapping to virtual desktop;
Wherein, USB device is redirected, and refers to USB device is mapped in other computing machine in the network use, and does not use in this locality;
Step 204: virtual bus interception user is redirected to the cloud terminal to the I/O request and the operation of virtual unit with this I/O request and operation;
Step 205: terminal control unit is handled redirected I/O request and the operation that receives, and result is returned to virtual bus;
Step 206: the result that virtual bus is returned the cloud terminal returns to operating system after analyzing and processing;
Step 207: operating system finally feeds back to the user experience layer according to the I/O result of virtual bus feedback;
Wherein, When new USB device adds the cloud terminal; Terminal control unit can be controlled new USB device and get into mapped mode; And the notice virtual bus opens a new device map, if current USB device is arranged when the cloud terminal removes, the cloud terminal assembly can notify virtual bus to discharge invalid mapping;
Step 208: the user finishes the virtual desktop session and breaks off virtual desktop, and virtual bus discharges virtual unit, finishes device map; Terminal control unit is redirected USB device once more and drives, and makes USB device get into local mode.
Wherein, said redirected USB device drives and refers to remove the function driver that operating system is bound to USB device, and binds new function and be driven on the USB device.
Wherein, When causing under the interrupted situation of device map owing to network anomaly; The mapping that mechanism such as employing disconnection reconnecting and the recovery of I/O passage buffering are come restorer I/O from ERST; This Restoration Mechanism is transparent, and the user is almost imperceptible to have unusual generation, can be good at keeping the continuity of user experience.
Said I/O passage buffering is recovered, and refers to adopt the disconnection reconnecting technology from network anomaly after the restorer mapping, from before take out the I/O request of buffering and accomplish I/O request and processing again for normal process at last before unusual the generation.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the method that USB device is redirected is characterized in that, comprises step:
A: cloud terminal USB device is redirected initialization operation;
B: virtual bus interception user is redirected to the cloud terminal to the I/O request and the operation of virtual unit;
C: terminal control unit is handled redirected I/O request and the operation that receives, and result is returned to virtual bus;
D: the result that virtual bus is returned the cloud terminal returns to operating system after analyzing and processing; Operating system finally feeds back to the user experience layer according to the I/O result of virtual bus feedback.
2. the method that USB device as claimed in claim 1 is redirected is characterized in that, also comprises before the step a: start virtual bus and on the cloud terminal, start terminal control unit at the virtual desktop end.
3. the method that USB device as claimed in claim 2 is redirected is characterized in that the said initialization operation of step a specifically comprises:
A1: the user opens the virtual desktop session and lands virtual desktop;
A2: terminal control unit reads in user's configuration and switches USB device to mapped mode;
A3: virtual scan bus cloud terminal USB device, according to the USB device information creating virtual equipment that obtains;
A4: open of the end-to-end mapping of cloud terminal USB device, accomplish the initialization procedure that cloud terminal USB device I/O serves the virtual desktop mapping to virtual desktop.
4. the method that USB device as claimed in claim 1 is redirected is characterized in that, also comprises after the steps d: the user finishes the virtual desktop session and breaks off virtual desktop, and virtual bus discharges virtual unit, finishes device map; Terminal control unit is redirected USB device once more and drives, and makes USB device get into local mode.
5. the method that USB device as claimed in claim 4 is redirected is characterized in that, said redirected USB device drives and specifically refers to remove the function driver of operating system to the USB device binding, and binds new function and be driven on the USB device.
6. the method that USB device as claimed in claim 1 is redirected is characterized in that, comprise that also when new USB device adds the cloud terminal, terminal control unit will be controlled new USB device and get into mapped mode, and the notice virtual bus is opened a new device map.
7. the method that USB device as claimed in claim 1 is redirected is characterized in that, comprises that also the cloud terminal assembly can notify virtual bus to discharge invalid mapping if current USB device is arranged when the cloud terminal removes.
8. a USB device Redirectional system is characterized in that, comprising: cloud terminal, network router/hub and virtual desktop, cloud terminal are set up data communication through network router/hub and virtual desktop and are connected;
The cloud terminal comprises terminal control unit, is used to control peripheral hardware, accomplishes transmission, reception and the processing operation of control information and data message;
Virtual desktop comprises virtual bus, is used to create virtual equipment, and the intercepting user accomplishes the transmission of equipment I/O operation to the cloud terminal to the I/O operation of equipment, and the I/O operating result that the cloud terminal is returned is analyzed and handled.
9. USB device Redirectional system as claimed in claim 8 is characterized in that, also comprises gateway server, is used to realize data forwarding, and the wide area network access operation is provided.
10. USB device Redirectional system as claimed in claim 8 is characterized in that, also comprises configuration server, is used to manage concentratedly the user and disposes list, accomplishes the mapping management of USB device on the cloud terminal through blacklist and white list mode.
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| CN201110311308.4A CN102368231B (en) | 2011-10-14 | 2011-10-14 | Method and system for redirecting USB (universal serial bus) devices |
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| CN201110311308.4A CN102368231B (en) | 2011-10-14 | 2011-10-14 | Method and system for redirecting USB (universal serial bus) devices |
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| CN102368231B CN102368231B (en) | 2014-02-12 |
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| CN103714020A (en) * | 2013-12-27 | 2014-04-09 | 普华基础软件股份有限公司 | USB device redirecting system based on network |
| CN103914525A (en) * | 2014-03-25 | 2014-07-09 | 深圳市深信服电子科技有限公司 | FAT32-formatted data reading method and system for use after USB equipment redirection |
| CN104991871A (en) * | 2015-06-15 | 2015-10-21 | 湖南昇云科技有限公司 | Method and system for redirecting cloud terminal USB |
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| CN105183675A (en) * | 2015-09-30 | 2015-12-23 | 华为技术有限公司 | USB equipment access method, device and system, terminal and server |
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| CN104991871A (en) * | 2015-06-15 | 2015-10-21 | 湖南昇云科技有限公司 | Method and system for redirecting cloud terminal USB |
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| CN105159749B (en) * | 2015-09-11 | 2019-02-12 | 广东微云科技股份有限公司 | A kind of cloud terminal redirects local disk to the method and system of virtual machine |
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