CN104123244A - USB redirection system and method - Google Patents
USB redirection system and method Download PDFInfo
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- CN104123244A CN104123244A CN201310147679.2A CN201310147679A CN104123244A CN 104123244 A CN104123244 A CN 104123244A CN 201310147679 A CN201310147679 A CN 201310147679A CN 104123244 A CN104123244 A CN 104123244A
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Abstract
The invention discloses a USB redirection method. The USB redirection method comprises the steps that when a USB device is connected to a client side, a USB redirection device on the client side is started; the type of the USB device is detected; data on the USB device are compressed according to the type of the USB device; compressed data are transmitted to a server through the redirection device on the client side; a USB redirection device on the server is started; compressed data sent by the client side are received through the redirection device on the server; the compressed data are decompressed; decompressed data are transmitted to a virtual machine, so that decompressed data are processed through a remote desktop on the client side. The invention further provides a USB redirection system. According to the USB redirection system and method, the network flow consumed when date are transmitted during USB redirection can be reduced, and cost is reduced for users.
Description
Technical field
The present invention relates to a kind of USB is redirected and method.
Background technology
It is a kind of technology that for example, is again directed to virtual desktop after USB device (, USB flash disk) inserts client that USB is redirected (USB redirection).Yet, in USB redirection technology in the past, when a USB device inserts after client, client is directly directed to the server of far-end again by the data on this USB device, thus, can cause the huge consumption of network traffics, if the data in USB device are huge, can increase the cost (for example, need to increase the network equipment, to improve the bandwidth between client and server) of enterprise.
Summary of the invention
In view of above content, be necessary to provide a kind of USB Redirectional system, this USB Redirectional system comprises that the USB in client is redirected the USB redirect-host system on client and server, by USB, be redirected client and USB redirect-host system and can reduce the network traffics of using while transmitting data in USB redirection process, reduced the cost of enterprise.
In view of above content, be also necessary to provide a kind of USB reorientation method, it can reduce the network traffics of using while transmitting data in USB redirection process, has reduced the cost of enterprise.
USB is redirected a client, and this system runs in client, and this system comprises: first starts module, and for when USB device is connected to client, the USB starting in client is redirected; Detecting module, for detecting the type of USB device; The first processing module, for according to the type of USB device, compresses processing to the data on USB device; The first sending module, for sending the data after compression to server by being redirected in client.
A USB redirect-host system, this system runs in server, and this system comprises: second starts module, for the USB starting on server, is redirected; Receiver module, is redirected and receives the packed data that client sends over for the USB by server; The second processing module, for carrying out decompression processing to described packed data; The second sending module, for data after decompress(ion) are transmitted to virtual machine, the data after to decompress(ion) operate by the remote desktop in client to make user.
A USB reorientation method, the method comprises: when USB device is connected to client, the USB starting in client by the remote desktop in client is redirected; The type of detecting USB device; According to the type of USB device, the data on USB device are compressed to processing; By being redirected in client, send the data after compression to server; The USB starting on server is redirected; By the USB on server, be redirected and receive the packed data that client sends over; Described packed data is carried out to decompression processing; Data after decompress(ion) are transmitted to virtual machine, and the data after to decompress(ion) operate by the remote desktop in client to make user.
Compared to prior art, USB Redirectional system provided by the invention and method, it can reduce the network traffics of using while transmitting data in USB redirection process, has reduced the cost of enterprise.
Accompanying drawing explanation
Fig. 1 is the applied environment figure of USB Redirectional system of the present invention preferred embodiment.
Fig. 2 is the functional block diagram that the USB in client of the present invention is redirected client preferred embodiment.
Fig. 3 is the functional block diagram of the USB redirect-host system preferred embodiment in server of the present invention.
Fig. 4 is the process flow diagram of USB reorientation method of the present invention preferred embodiment.
Main element symbol description
| USB device | 10 |
| Client | 20 |
| Remote desktop | 22 |
| USB is redirected client | 200 |
| First starts module | 210 |
| Detecting module | 220 |
| The first processing module | 230 |
| The first sending module | 240 |
| Network | 30 |
| Server | 40 |
| USB redirect-host system | 400 |
| Second starts module | 410 |
| Receiver module | 420 |
| The second processing module | 430 |
| The second sending module | 440 |
Following embodiment further illustrates the present invention in connection with above-mentioned accompanying drawing.
Embodiment
Consulting shown in Fig. 1, is the applied environment figure of USB Redirectional system of the present invention preferred embodiment.This USB Redirectional system is divided into two parts, first is that USB is redirected client 200, this USB is redirected client 200 and runs in the remote desktop 22 of client 20, second portion is USB redirect-host system 400, and this USB redirect-host system 400 runs in server 40.
Described client 20 is communicated and is connected by network 30 with described server 40.Described client 20 may be, but not limited to,, the devices such as personal computer, panel computer, smart mobile phone, thin-client (Thin Client).
Described network 30 can be internet, LAN (Local Area Network) or other communication network.
Described client 20 is also connected with USB device 10.Other devices with USB interface such as described USB device 10 comprises polytype, and the type of described USB device 10 may be, but not limited to,, the USB device (for example, U shield) of USB memory storage (for example, USB flash disk), USB camera head, microarray strip.
Described server 40 is called Host main frame, on this Host main frame, be provided with in one or more virtual machine 401(figure, take one be described as example).Described remote desktop 22, for being connected to the desktop of some virtual machines 401 on server 40, makes user can use this virtual machine 401.Described remote desktop 22 may be, but not limited to,, RDP (Remote Desktop Protocol, RDP) software or virtual desktop architecture (Virtual Desktop Infrastructure, VDI) software.
By USB, be redirected client 200 and USB redirect-host system 400 and can realize USB and be redirected, the data that are about to be connected in the USB device 10 of client 20 send the virtual machine 401 in server 40 to.Described USB is redirected client 200 and USB redirect-host system 400 is also provided with multiple decompression and encryption software, described PKUNZIP is to comprise, but be not limited to, LZW(Lempel-Ziv-Welch), LZSS(Lempel-Ziv-Storer-Szymanski), MPEG-1, MPEG-2, MPEG-4, H.264, H.265, the software of the decompression algorithm such as LZ77, LZ78.Described encryption software includes, but not limited to AES(Advanced Encryption Standard), DES(Advanced Encryption Standard), Secure Socket Layer (SSL) (Secure Sockets Layer, SSL) etc. separates the software of cryptographic algorithm.It should be noted that, LZW and LZSS decompression algorithm are to decompress for the data in USB memory storage, MPEG-1, MPEG-2, MPEG-4, H.264, H.265 decompression algorithm is to decompress for the captured image data of USB camera head, LZ77, LZ78 decompress for the data on the USB device of microarray strip.AES, DES and SSL cryptographic algorithm are to be encrypted for the data on the USB device of USB memory storage and microarray strip.
Consulting shown in Fig. 2, is the functional block diagram of redirected client 200 preferred embodiments of USB in client 20 of the present invention.This USB is redirected client 200 and comprises the first startup module 210, detecting module 220, the first processing module 230 and the first sending module 240.The alleged module of the present invention has been the computer program code segments of a specific function, than program, be more suitable in describing the implementation of software in computing machine, therefore below the present invention to all describing with module in software description.
Described first starts module 210 for when USB device 10 is connected to client 20, and the USB starting in client 20 by the remote desktop in client is redirected.
Described detecting module 220 is for detecting the type of USB device 10.Particularly, client 20 is provided with operating system, (for example in the registration table of this operating system, comprise various types of USB device fields, USB1 represents that USB memory storage, USB2 represent that USB camera head, USB3 represent the USB device of microarray strip), when some USB devices 10 are connected to client 20, in registration table to should obtaining response by USB device field, show to have USB device 10 to be connected to client 20, detecting module 220 is checked the USB device field of response from registration table, thereby determines the type of USB device 10.For example, when USB memory storage is connected to client 20, in the registration table in client 20 in operating system, USB device field is that USB1 obtains response, and detecting module 220 detects USB1 and obtains response, determines that the type of this USB device is USB memory storage.
Described the first processing module 230, for according to the type of USB device 10, is compressed processing to the data on USB device 10.Particularly, when the type of USB device 10 is USB memory storage, the first processing module 230 is compressed processing by LZW or LZSS decompression algorithm to the data in USB memory storage, when the type of USB device 10 is USB camera head, the first processing module 230 is passed through MPEG-1, MPEG-2, MPEG-4, H.264 or H.265 decompression algorithm is compressed processing to the captured image data of USB camera head, when the type of the USB device USB device that is microarray strip, the first processing module 230 is compressed processing by LZ77 or LZ78 decompression algorithm to the data on the USB device of microarray strip.In addition, in order to ensure data security, the first processing module 230 can also be encrypted the data on USB device 10, for example, by AES, DES and SSL cryptographic algorithm, the data on the USB device of USB memory storage or microarray strip is encrypted.
Described the first sending module 240 is for sending the data after compression to server 40 by being redirected in client 20.
As shown in Figure 3, be the functional block diagram of USB redirect-host system 400 preferred embodiments in server 40 of the present invention.This USB redirect-host system 400 comprises the second startup module 410, receiver module 420, the second processing module 430 and the second sending module 440.The alleged module of the present invention has been the computer program code segments of a specific function, than program, be more suitable in describing the implementation of software in computing machine, therefore below the present invention to all describing with module in software description.
Described second starts module 410 is redirected for the USB starting on server 40.Particularly, USB in client 20 can send enabled instruction to server 40 after being redirected and starting, and server 40 starts being redirected on server 40 after receiving the enabled instruction that client 20 sends over.
Described receiver module 420 is redirected and receives the packed data that client 20 sends over for the USB by server 40.
Described the second processing module 430 is for carrying out decompression processing to described packed data.Particularly, when packed data is to be compressed by LZW decompression algorithm, the second processing module 430 is carried out decompression processing by LZW decompression algorithm to packed data.When packed data is to be compressed by MPEG-1, the second processing module 430 is carried out decompression processing by MPEG-1 decompression algorithm to packed data.When packed data is to be compressed by LZ77 decompression algorithm, the second processing module 430 is carried out decompression processing by LZ77 decompression algorithm to packed data.
In addition, if packed data is encrypted, the second processing module 430 also needs packed data to be decrypted processing, for example, by AES, DES and SSL decipherment algorithm, packed data is decrypted to processing.
Described the second sending module 440 is for transmitting virtual machine 401 by the data after decompress(ion).User can operate by the data after decompress(ion) in 22 pairs of virtual machines 401 of remote desktop, for example, suppose that the data after decompress(ion) are texts, user can operate by 22 pairs of text files of remote desktop (as: operation such as editing, delete, copy).Because the packet size after compression diminishes, therefore can save network traffics.
Fig. 4 is the process flow diagram of USB reorientation method of the present invention preferred embodiment.
Step S10, when USB device 10 is connected to client 20, first starts module 210 is redirected by the USB in the remote desktop startup client 20 in client, and the second USB starting on module 410 startup servers 40 is redirected.Particularly, USB in client 20 can send enabled instruction to server 40 after being redirected and starting, and server 40 starts being redirected on server after receiving the enabled instruction that client 20 sends over.
Step S20, the type of detecting module 220 detecting USB devices 10.Particularly, client 20 is provided with operating system, (for example in the registration table of this operating system, comprise various types of USB device fields, USB1 represents that USB memory storage, USB2 represent that USB camera head, USB3 represent the USB device of microarray strip), when some USB devices 10 are connected to client 20, in registration table to should obtaining response by USB device field, show to have USB device 10 to be connected to client 20, detecting module 220 is checked the USB device field of response from registration table, thereby determines the type of USB device 10.For example, when USB memory storage is connected to client 20, in the registration table in client 20 in operating system, USB device field is that USB1 obtains response, and detecting module 220 detects USB1 and obtains response, determines that the type of this USB device is USB memory storage.
Step S30, the first processing module 230, according to the type of USB device 10, is compressed processing to the data on USB device 10.Particularly, when the type of USB device is USB memory storage, the first processing module 230 is compressed processing by LZW or LZSS decompression algorithm to the data in USB memory storage, when the type of USB device is USB camera head, the first processing module 230 is passed through MPEG-1, MPEG-2, MPEG-4, H.264 or H.265 decompression algorithm is compressed processing to the captured image data of USB camera head, when the type of the USB device USB device that is microarray strip, the first processing module 230 is passed through LZ77, LZ78 decompression algorithm is compressed processing to the data on the USB device of microarray strip.In addition, in order to ensure data security, the first processing module 230 can also be encrypted the data on USB device, for example, by AES, DES and SSL cryptographic algorithm, the data on the USB device of USB memory storage or microarray strip is encrypted.
Step S40, the first sending module 240 sends the data after compression to server 40 by being redirected in client 20.
Step S50, receiver module 420 is redirected and is received the packed data that client 20 sends over by the USB on server 40.
Step S60, the described packed data of the second 430 pairs of processing modules carries out decompression processing.Particularly, when packed data is to be compressed by LZW decompression algorithm, the second processing module 430 is carried out decompression processing by LZW decompression algorithm to packed data.When packed data is to be compressed by MPEG-1 decompression algorithm, the second processing module 430 is carried out decompression processing by MPEG-1 decompression algorithm to packed data.When packed data is to be compressed by LZ77 decompression algorithm, the second processing module 430 is carried out decompression processing by LZ77 decompression algorithm packed data.
In addition, if packed data is encrypted, the second processing module 430 also needs packed data to be decrypted processing, for example, by AES, DES and SSL decipherment algorithm, packed data is decrypted to processing.
Step S70, the second sending module 440 transmits virtual machine 401 by the data after decompress(ion).User can operate by the data after decompress(ion) in 22 pairs of virtual machines 401 of remote desktop, for example, suppose that the data after decompress(ion) are texts, user can operate by 22 pairs of text files of remote desktop (as: operation such as editing, delete, copy).
It should be noted last that, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to above preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not depart from the spirit and scope of technical solution of the present invention.
Claims (16)
1. USB is redirected a client, it is characterized in that, this system runs in client, and this system comprises:
First starts module, and for when USB device is connected to client, the USB starting in client by the remote desktop in client is redirected;
Detecting module, for detecting the type of USB device;
The first processing module, for according to the type of USB device, compresses processing to the data on USB device; And
The first sending module, for sending the data after compression to server by being redirected in client.
2. USB as claimed in claim 1 is redirected client, it is characterized in that, described first starts module also for after the redirected startup of the USB in client, sends enabled instruction to server, to start being redirected on server.
3. USB as claimed in claim 1 is redirected client, it is characterized in that, the type of described USB device comprises the USB device of USB memory storage, USB camera head and microarray strip.
4. USB as claimed in claim 3 is redirected client, it is characterized in that, this system be also provided with comprise LZW, LZSS, MPEG-1, MPEG-2, MPEG-4, H.264, H.265, the PKUNZIP of LZ77 and LZ78 decompression algorithm.
5. USB as claimed in claim 4 is redirected client, it is characterized in that, when the type of USB device is USB memory storage, the first processing module is compressed processing by LZW or LZSS decompression algorithm to the data in USB memory storage, when the type of USB device is USB camera head, the first processing module is passed through MPEG-1, MPEG-2, MPEG-4, H.264 or H.265 decompression algorithm is compressed processing to the captured image data of USB camera head, when the type of the USB device USB device that is microarray strip, the first processing module is compressed processing by LZ77 or LZ78 decompression algorithm to the data on the USB device of microarray strip.
6. USB as claimed in claim 1 is redirected client, it is characterized in that, described detecting module is realized the detecting to the type of USB device by USB device field in the registration table in operating system in detecting client.
7. a USB redirect-host system, is characterized in that, this system runs in server, and this system comprises:
Second starts module, for the USB starting on server, is redirected;
Receiver module, is redirected and receives the packed data that client sends over for the USB by server;
The second processing module, for carrying out decompression processing to described packed data; And
The second sending module, for the data after decompress(ion) being sent to the virtual machine of server, the data after to decompress(ion) operate by the remote desktop in client to make user.
8. a USB reorientation method, the method is applied to, in client, it is characterized in that, the method comprises:
When USB device is connected to client, the USB starting in client is redirected;
The type of detecting USB device;
According to the type of USB device, the data on USB device are compressed to processing; And
By being redirected in client, send the data after compression to server.
9. USB reorientation method as claimed in claim 8, it is characterized in that, the parameter information of described server comprise the clock frequency of the CPU of server, the cache size of the core amounts of CPU, CPU, the maximum utilization rate of the type of CPU, CPU, the current use capacity of the current utilization rate of CPU, the max cap. of internal memory, the model of the clock frequency of internal memory, internal memory, internal memory, the current use capacity of the max cap. of storer, storer, the interface access speed of storer and the model of storer, the transmission speed of the model of network interface card and network interface card.
10. USB reorientation method as claimed in claim 8, is characterized in that, after the USB in client is redirected and starts, client sends enabled instruction to server, to start being redirected on server.
11. USB reorientation methods as claimed in claim 8, is characterized in that, the type of described USB device comprises the USB device of USB memory storage, USB camera head and microarray strip.
12. USB reorientation methods as claimed in claim 11, it is characterized in that, the data on described USB device by LZW, LZSS, MPEG-1, MPEG-2, MPEG-4, H.264, H.265, the PKUNZIP of LZ77 or LZ78 decompression algorithm compresses.
13. USB reorientation methods as claimed in claim 12, it is characterized in that, when the type of USB device is USB memory storage, by LZW or LZSS decompression algorithm, the data in USB memory storage are compressed to processing, when the type of USB device is USB camera head, pass through MPEG-1, MPEG-2, MPEG-4, H.264 or H.265 decompression algorithm is compressed processing to the captured image data of USB camera head, when the type of the USB device USB device that is microarray strip, by LZ77 or LZ78 decompression algorithm, the data on the USB device of microarray strip are compressed to processing.
14. USB reorientation methods as claimed in claim 12, is characterized in that, described packed data by LZW, LZSS, MPEG-1, MPEG-2, MPEG-4, H.264, H.265, the PKUNZIP of LZ77 or LZ78 decompression algorithm carries out decompress(ion).
15. USB reorientation methods as claimed in claim 8, is characterized in that, the type of described detecting USB device realizes by USB device field in the registration table in operating system in detecting client.
16. 1 kinds of USB reorientation methods, the method applies to, in server, it is characterized in that, the method comprises:
The USB starting on server is redirected;
By the USB on server, be redirected and receive the packed data that client sends over;
Described packed data is carried out to decompression processing; And
By the virtual machine of the data delivery service device after decompress(ion), the data after to decompress(ion) operate by the remote desktop in client to make user.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147679.2A CN104123244A (en) | 2013-04-25 | 2013-04-25 | USB redirection system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310147679.2A CN104123244A (en) | 2013-04-25 | 2013-04-25 | USB redirection system and method |
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| CN104123244A true CN104123244A (en) | 2014-10-29 |
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| CN201310147679.2A Pending CN104123244A (en) | 2013-04-25 | 2013-04-25 | USB redirection system and method |
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| CN104539685A (en) * | 2014-12-19 | 2015-04-22 | 华南理工大学 | USB disk identifying system and method for OpenStack cloud desktop |
| CN105068944A (en) * | 2015-07-20 | 2015-11-18 | 深圳市青葡萄科技有限公司 | High availability method and architecture of universal serial bus (USB) peripherals in virtualization environment |
| CN105391652A (en) * | 2015-12-03 | 2016-03-09 | 武汉噢易云计算有限公司 | USB equipment network sharing system and method based on USB redirection |
| CN109040786A (en) * | 2018-09-03 | 2018-12-18 | 锐捷网络股份有限公司 | Transmission method, device, system and the storage medium of camera data |
| CN115190073A (en) * | 2022-05-20 | 2022-10-14 | 阿里巴巴（中国）有限公司 | Method, system and related equipment for realizing USB redirection |
| CN117555829A (en) * | 2024-01-12 | 2024-02-13 | 中诚华隆计算机技术有限公司 | USB redirection system and method for realizing network sharing of USB equipment |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104539685A (en) * | 2014-12-19 | 2015-04-22 | 华南理工大学 | USB disk identifying system and method for OpenStack cloud desktop |
| CN104539685B (en) * | 2014-12-19 | 2018-06-22 | 华南理工大学 | The USB flash disk identifying system and method for a kind of OpenStack clouds desktop |
| CN105068944A (en) * | 2015-07-20 | 2015-11-18 | 深圳市青葡萄科技有限公司 | High availability method and architecture of universal serial bus (USB) peripherals in virtualization environment |
| CN105391652A (en) * | 2015-12-03 | 2016-03-09 | 武汉噢易云计算有限公司 | USB equipment network sharing system and method based on USB redirection |
| CN109040786A (en) * | 2018-09-03 | 2018-12-18 | 锐捷网络股份有限公司 | Transmission method, device, system and the storage medium of camera data |
| CN109040786B (en) * | 2018-09-03 | 2022-01-11 | 锐捷网络股份有限公司 | Camera data transmission method, device and system and storage medium |
| CN115190073A (en) * | 2022-05-20 | 2022-10-14 | 阿里巴巴（中国）有限公司 | Method, system and related equipment for realizing USB redirection |
| CN117555829A (en) * | 2024-01-12 | 2024-02-13 | 中诚华隆计算机技术有限公司 | USB redirection system and method for realizing network sharing of USB equipment |
| CN117555829B (en) * | 2024-01-12 | 2024-03-22 | 中诚华隆计算机技术有限公司 | USB redirection system and method for realizing network sharing of USB equipment |
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Application publication date: 20141029 |