WO2015158156A1

WO2015158156A1 - Device for extending universal serial bus transmission distance

Info

Publication number: WO2015158156A1
Application number: PCT/CN2015/000188
Authority: WO
Inventors: 丰斌; 施鹏; 梁科; 王元龙
Original assignee: 天津瑞发科半导体技术有限公司
Priority date: 2014-04-17
Filing date: 2015-03-19
Publication date: 2015-10-22
Also published as: CN103885918B; CN103885918A

Abstract

Provided is a device for extending the universal serial bus transmission distance. The device comprises a transmitting end device (3), a receiving end device (4) and a cable (5). The transmitting end device (3) and the receiving end device (4) each comprise a USB reception processing unit (1000), a USB transmission processing unit (2000), a USB interface unit (3000), an extension cable transmission processing unit (4000), an extension cable interface unit (6000) and an extension cable reception processing unit (5000). The cable is formed in a long-distance mode. A management package of the device transmits status information between the transmitting end device (3) and the receiving end device (4). One or two channels are selected for communication in the device. In the device, by means of data format conversion, USB-format data that needs to be transmitted is converted into a format suitable for transmission in the long-distance cable at the transmitting end, and the USB-format data is recovered through inverse conversion at the receiving end, so that the transmission distance is extended.

Description

Device for extending the transmission distance of a universal serial bus

Technical field

The invention relates to a device for extending the transmission distance of a universal serial bus, in particular to a technology for transmitting USB2.0 data over a long distance cable between a USB 2.0 host and a USB 2.0 device to increase the transmission distance of the USB 2.0.

Background technique

The universal serial bus English is Universal Serial Bus, abbreviated as USB. It is an interface technology widely used in the PC field. The USB interface has the characteristics of fast transmission speed, hot plugging, and simultaneous connection of multiple devices. Many application peripherals can be connected to a personal computer via USB using the same standard, including USB hard drive, USB optical drive, USB mouse, USB keyboard, USB printer, USB sound card, USB network card, USB camera, USB video capture device, USB ether. Network adapters, etc., the prior art USB interface includes USB1.1, USB2.0 and USB3.0/USB3.1 which have appeared in recent years. In theory, the transmission speed of USB1.1 can reach 12 megabits per second, while USB2. 0 can reach speed 480 megabits per second, and can be backward compatible with USB1.1; among the three USB interfaces, USB2.0 is currently the most widely used, and the transmitting device and receiving device are respectively compliant with the USB2.0 protocol. USB2.0 host and USB2.0 device, the sending device and the receiving device are connected by USB2.0 cable. When the USB2.0 signal is transmitted through the USB2.0 cable, there is signal attenuation, USB2.0 cable The maximum length is only 5 meters. At the same time, although the USB2.0 hub connection can be used between the sending device and the receiving device, only the level 5 hub can be used at most, so the limitation of the use distance largely restricts the application of USB2.0.

Summary of the invention

The technical problem to be solved by the present invention is that, by means of data format conversion, the data of the USB2.0 format that needs to be transmitted is converted into a format suitable for transmission on a long-distance cable at the transmitting end, and the inverse conversion processing is performed at the receiving end. Restore the data into USB2.0 format, so as to achieve the purpose of extended distance transmission.

In order to solve the above technical problem, the technical solution adopted by the present invention is: as an apparatus for extending the transmission distance of a universal serial bus of the present invention, the apparatus for extending the transmission distance of the universal serial bus includes a transmitting end device, a receiving end device, and a line. The cable is connected to the transmitting device, the receiving device is connected to the receiving device, and the transmitting device is connected to the receiving device through a cable. The transmitting device and the receiving device respectively comprise a USB receiving processing unit and a USB transmitting and processing unit. , USB interface unit, extension line transmission processing unit, extension line interface unit, extension line receiving and processing unit, the cable is formed long distance, the cable can be different media, different models and specifications of cable, including coaxial cable, double If a twisted pair cable is used as the cable, it is only necessary to selectively use one channel and two channels on several cores of the twisted pair to transmit the corresponding data without more core transmission. Other auxiliary nature signals simplify the implementation of the invention and save on cable costs to some extent. In the number of channels, only one channel can be used for communication, or two channels can be used for communication at the same time. When only one channel is used for communication, the signal rate on the channel is twice the signal rate when communicating with two channels.

As another apparatus for extending the universal serial bus transmission distance of the present invention, the apparatus for extending the transmission distance of the universal serial bus includes a transmitting end device, a receiving end device and a cable, and the transmitting device is connected to the transmitting end device, and the receiving device is connected. The receiving end device, the transmitting end device is connected to the receiving end device through a cable, and the transmitting end device and the receiving end device respectively comprise a USB receiving processing unit and a USB sending processing unit, and the USB receiving processing unit internally comprises a USB format unpacking unit and management a packet generation unit and a channel division unit; wherein the USB format unpacking unit receives the transmission data packet in the USB format from the transmitting device, and unpacks the data according to the USB data format, and obtains the USB valid data and sends the data to the channel division unit; The packet generation unit is configured to generate management packet valid data to be sent, and the management packet is a data packet different from the USB format data packet, and is used for exchanging respective state information between the transmitting device and the receiving device, and establishing a link in the USB. And the management packet transmission is required to handle various abnormal situations, and the management package generation sheet is used. Generating management packet valid data and transmitting it to the channel dividing unit; the channel dividing unit receives the USB valid data from the USB format unpacking unit and the management packet valid data from the management packet generating unit, and performs the second selection and the selected transmission data. For data splitting, the method of data splitting varies according to the number of channels used. If only one channel is used, the transmitted data will be directly transmitted. Delivered to this channel for transmission. If two channels are used at the same time, the selected transmission data needs to be equally distributed to the two channels and then sent separately. The USB transmission processing unit internally includes a USB format packing unit, a management packet parsing unit, The channel merging unit; wherein the processing of the channel merging unit is different according to the number of channels used, if only one channel is used, the channel merging unit only needs to analyze the data type of the data received on the channel, if the data type is USB data, Then, the received data is sent to the USB format packing unit. If the data type is management packet data, the received data is sent to the management packet parsing unit; if two channels are used at the same time, the channel merging unit needs to firstly use the two channels. The received data is combined into one received data, and then the data type of the combined received data is analyzed. If the data type is USB data, the combined received data is sent to the USB format packing unit, if the data type is management packet data. , then merge this The received data is sent to the management packet parsing unit, and the USB format packing unit receives the USB data from the channel merging unit, and adds a new prefix code and a new suffix code to the USB data according to the USB data format, thereby generating a USB format data packet and transmitting it to the USB. The interface unit, the management packet parsing unit receives the management packet data from the channel merging unit, analyzes the content of the management packet data, and performs corresponding operations, including: power consumption control, state machine reset, and re-operation of the circuit of the device Perform USB2.0 link process, control USB2.0 pull-up or pull-down resistor on/off, notify management packet generation unit to generate management packet to respond, etc. Management in management packet generation unit and USB reception processing unit in USB transmission processing unit The combination of the packet parsing unit makes the hard-to-transfer USB 2.0 format an easy-to-transfer format, turning slow transmission into fast transmission.

As another apparatus for extending the universal serial bus transmission distance of the present invention, the apparatus for extending the transmission distance of the universal serial bus includes a transmitting end device, a receiving end device and a cable, and the transmitting device is connected to the transmitting end device, and the receiving device is connected. The receiving end device is connected to the receiving end device by a cable, and the transmitting end device and the receiving end device respectively comprise a USB receiving processing unit and a USB sending processing unit, and the USB receiving processing unit internally comprises a USB format unpacking unit and a channel. a dividing unit; wherein the USB format unpacking unit receives the pre-depacked data packet from the USB device of the transmitting device, and unpacks the pre-disassembled data packet according to the USB data format to obtain USB valid data and sends the data to the channel dividing unit; channel division The unit receives the USB valid data from the USB format unpacking unit, and performs data splitting on the USB valid data. The data splitting method varies according to the number of channels used. If only one channel is used, the USB is directly valid. Data is passed to this channel for transmission, If two channels are used at the same time, the USB valid data needs to be evenly distributed to the two channels and then separately sent. The USB transmission processing unit internally includes a USB format packing unit and a channel combining unit; wherein the channel combining unit is processed according to the channel used. The number is different. If only one channel is used, the channel merging unit only needs to send the received data on this channel to the USB format packing unit. If two channels are used at the same time, the channel merging unit needs to receive the two channels first. The data is combined into one received data, and then the combined received data is sent to the USB format packing unit, and the USB format packing unit receives the USB data from the channel combining unit, and adds a prefix code and a suffix code to the USB data according to the USB data format. , thereby generating a transmission packet in a USB format and transmitting it to the USB interface unit.

The beneficial effects of the invention are:

The device for extending the transmission distance of the universal serial bus of the invention converts the data packet of the USB2.0 format by a device for extending the transmission distance of the USB2.0, so that the converted signal is suitable for transmission on the cable of an ultra long distance. It greatly increases the limit distance of USB2.0 transmission; at the same time, the device supports different channels of two channels and two channels for transmission, which increases the applicable range.

DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and embodiments:

1 is a block diagram of an overall device for extending a universal serial bus transmission distance according to the present invention;

2 is a diagram showing an external connection signal of a USB receiving processing unit in an apparatus for extending a universal serial bus transmission distance according to the present invention, and an internal functional block diagram thereof.

3 is a diagram showing an external connection signal of a USB transmission processing unit in an apparatus for extending a universal serial bus transmission distance according to the present invention, and an internal functional block diagram thereof.

4 is a diagram showing an external connection signal of a USB interface unit in a device for extending a universal serial bus transmission distance according to the present invention;

5 is an external view of an extension line transmission processing unit in an apparatus for extending a universal serial bus transmission distance according to the present invention; Connection signal diagram and its internal function block diagram

6 is a diagram showing an external connection signal of an extension line receiving processing unit in an apparatus for extending a universal serial bus transmission distance according to the present invention, and an internal functional block diagram thereof;

7 is a diagram showing an external connection signal of an extension line interface unit in an apparatus for extending a universal serial bus transmission distance according to the present invention;

among them:

1 sending device 2 receiving device

3 transmitting device 4 receiving device

5 cable 1000 USB receiving and processing unit

2000 USB Transmitter Processing Unit 3000 USB Interface Unit

4000 extension cable transmission processing unit 6000 extension cable interface unit

5000 extension line receiving and processing unit 1100 USB format unpacking unit

1200 Management Pack Generation Unit 1300 Channel Division Unit

2100 USB format packing unit 2200 management pack parsing unit

2300 channel merge unit 4100 extension line format packing unit

4200 extension line transmission coding unit 5100 extension line reception decoding unit

5200 extension cord format unpacking unit

detailed description

Hereinafter, the apparatus for extending the universal serial bus transmission distance and the control method thereof according to the embodiment in the accompanying drawings will be further described.

As shown in FIG. 1 , the transmitting device 1 is a USB 2.0 host, and is connected to the transmitting device 3 of the present invention through a USB 2.0 cable, and the receiving device 2 is a USB 2.0 device, and the receiving end of the present invention. The devices 4 are connected by a USB 2.0 cable, and the transmitting end device 3 and the receiving end device 4 are connected to each other by a cable 5; the cable 5 is formed over a long distance, wherein the transmitting end device 3 and the receiving end device 4 are both USB receiving processing list The element 1000, the USB transmission processing unit 2000, the USB interface unit 3000, the extension line transmission processing unit 4000, the extension line interface unit 6000, and the extension line reception processing unit 5000 are provided with the transmitting end device 3 and the receiving end respectively on the two ends of the cable 5 of the present invention. After the terminal device 4, the transmitting device 3 and the receiving device 4 have the same structure and can be used interchangeably. Meanwhile, the transmitting device 3 and the receiving device 4 respectively have a transmitting and receiving function, and the present invention can realize bidirectional transmission, and USB2.0. The transmitting device 1 matches the bidirectional transmission function of the receiving device 2.

The USB receiving processing unit 1000 of the present invention internally includes a USB format unpacking unit 1100, a management packet generating unit 1200, and a channel dividing unit 1300. The USB transmitting processing unit 2000 internally includes a USB format packing unit 2100, a management packet parsing unit 2200, and a channel merging unit 2300. The extension line transmission processing unit 4000 internally includes an extension line format packing unit 4100 and an extension line transmission encoding unit 4200. The extension line receiving processing unit 5000 internally includes an extension line receiving decoding unit 5100 and an extension line format unpacking unit 5200. The cable 5 can be a cable of different media, different types and specifications, including a coaxial cable, a twisted pair cable, etc. When the cable 5 is a twisted pair cable, only the wire cores of the twisted pair cable are needed. The data corresponding to each channel and the two channels are transmitted, and the prior art requires more cores to transmit signals of other auxiliary properties. The invention simplifies the specific technical structure to some extent and saves the cable cost. In the number of channels, only one channel can be used for communication, or two channels can be used for communication at the same time. When only one channel is used for communication, the signal rate on the channel is twice the signal rate when communicating with two channels; When only one channel is used for communication, at the transmitting end, the channel dividing unit 1300 inside the USB receiving processing unit 1000 allocates all the transmitted data to the channel, and only needs to use the extension line corresponding to the channel to send the processing unit 4000. At the receiving end, it is only necessary to use the extension line corresponding to the channel to receive the processing unit 5000, and only need to use the extension line interface unit 6000 corresponding to the channel; when two channels are used for communication at the same time, at the transmitting end The channel dividing unit 1300 inside the USB receiving processing unit 1000 equally distributes the transmission data to the two channels without prioritization, and for each channel of the two channels, each channel needs a separate extension line transmission processing unit. 4000, at the receiving end, each channel requires its own extension line to receive the processing unit 5000, while each Channel needs an extension line interface unit 6000 each, and also needs to be sent inside the processing unit 2000 channels merge unit 2300 merging the two channels of data for the same data path via USB.

As shown in FIG. 2, the USB format unpacking unit 1100 inside the USB receiving processing unit 1000 receives the pre-depacked data packet 1001 from the USB interface unit 3000. Before demolition, the data packet 1001 is a USB2.0 format data packet. Before unpacking, the pre-demolition data packet 1001 includes a USB prefix code 1003, a USB valid data 1110, and a USB suffix code 1004. The function of the USB format unpacking unit 1100 is to be removed. The USB prefix code 1003 and the USB suffix code 1004 in the pre-packet 1001 are removed, leaving only the USB valid data 1110. The USB format unpacking unit 1100 transmits this USB valid data 1110 to the channel dividing unit 1300. The management packet generation unit 1200 generates transmission management packet valid data 1210 that is transmitted to the channel division unit 1300. In the present device, in addition to transmitting high-speed USB 2.0 data by using the extended length cable 5, a management pack is also transmitted. In this embodiment, there are two main functions of the management package. First, when establishing a USB 2.0 link, the USB 2.0 host functions as the transmitting device 1, and a handshake process is required between the receiving device 2 and the handshake process. The low-speed level signal is carried out, whether the low-speed level signal exists and the length of the existence time is the handshake content, and then the management packet is needed to transmit the handshake content to the other end of the long-distance cable 5, so as to The low-level level signal is regenerated on the USB interface at the other end to implement the handshake process. In addition, the management package is also used to handle various abnormal conditions to ensure the status of the transmitting device 3 and the receiving device 4 at both ends of the cable 5. Stay in sync. The channel dividing unit 1300 receives the USB valid data 1110 from the USB format unpacking unit 1100 and the management packet valid data 1210 from the management packet generating unit 1200, and selects the selected ones as needed, and generates the selected transmitted data. And then perform different operations on the selected transmission data according to the number of channels currently used; if only one channel is used, then the selected transmission data is all divided into this channel; if two channels are used at the same time, then The selected transmission data is equally divided into two channels, and this data division does not set a priority between the two channels. The channel dividing unit 1300 generates transmission data 1002 that is transmitted to the extension line transmission processing unit 4000.

As shown in FIG. 3, the channel merging unit 2300 inside the USB transmission processing unit 2000 receives the received data 2310 from the extension line receiving processing unit 5000; if only one channel is used, there is only one extension line receiving processing unit 5000, and no pair is required. Receiving data 2310 for merging; if two channels are used at the same time, there are two extension line receiving processing units 5000 at the same time, and two receiving data 2310 sent by two extension line receiving processing units 5000 need to be merged; Channels need to be merged with data, Since the delay of the data of the two channels after long-distance transmission on the cable 5 is different, the delay deviation needs to be removed during data merging, that is, the phase alignment of the received data 2310 of the two channels needs to be performed first, and then Data merge. The channel merging unit 2300 analyzes the data type of the combined received data, that is, whether the received data is USB data or management packet data; if the type of the received data is USB data, the receiving is sent to the USB 2.0 format packing unit 2100. Data 2310; if the type of the received data is management packet data, the management packet reception data 2320 transmitted to the management packet parsing unit 2200 is generated. The channel dividing unit 1300 is used in combination with the channel combining unit 2300, so that one channel or two channels of the cable 5 can be selected for long-distance transmission, which enhances the applicable range of the device. The USB 2.0 format packing unit 2100 receives the received data 2310 from the channel combining unit 2300, adds a USB prefix code 2002, a USB suffix code 2003, and generates a generated data packet 2001 of the USB 2.0 format transmitted to the USB interface unit 3000. The management packet parsing unit 2200 receives the management packet receiving data 2320 from the channel merging unit 2300, analyzes the management packet receiving data 2320, and performs corresponding operations. The specific operation content can be customized according to requirements, and the operations include: performing circuit on the device The power consumption control, the state machine reset, the USB 2.0 link process is re-executed, the ON/OFF of the USB 2.0 pull-up or pull-down resistor is controlled, the notification management packet generation unit 1200 generates a management packet to respond, and the like. The management pack generation unit 1200 and the management pack parsing unit 2200 are used in combination, so that the USB 2.0 format that is not easily transmitted over long distances becomes a format that is easy to transmit over long distances, and slow transmission becomes a fast transmission.

As shown in FIG. 4, both the transmitting device 1 and the receiving device 2 can send the terminal USB data packet 3001 in the USB2.0 format to the adjacent USB interface unit 3000. Now, only the transmitting device 1 sends the USB interface unit 3000 to the USB interface unit 3000 as an example. The interface unit 3000 receives the terminal USB data packet 3001 in the USB2.0 format, and generates the USB2.0 format pre-demolition data packet 1001 sent to the USB format unpacking unit 1100; meanwhile, the USB interface unit 3000 receives the package from the USB2.0 format. The data packet 2001 is generated in the USB 2.0 format of the unit 2100, and a terminal USB data packet 3001 of the USB 2.0 format transmitted to the transmitting device 1 and the receiving device 2 is generated. It can be seen that the terminal USB data packet 3001 of the USB2.0 format is bidirectional data transmitted on the USB2.0 cable, because the USB2.0 transmission adopts a half-duplex working mode. The receiving device 2 can also send the terminal USB data packet 3001 in the USB2.0 format to the USB interface unit 3000 of the receiving device 4, and transmit it to the transmitting device 3 through the cable 5. Thereby, the receiving device 2 is realized to transmit information to the transmitting device 1, and this process is completely reversible.

As shown in FIG. 5, the extension line transmission processing unit 4000 internally includes an extension line format packing unit 4100 and an extension line transmission encoding unit 4200; the extension line format packing unit 4100 receives transmission data from the channel dividing unit 1300 inside the USB reception processing unit 1000. 1002, the extension line format is packaged, and the specific content is as shown in FIG. 5, and an extension line prefix code 4002, an extension line synchronization code 4003, an extension line check code 4004, and an extension line suffix code 4005 are added to the transmission data 1002, thereby The packaged transmission data packet 4110 is obtained, wherein the added extension line prefix code 4002, the extension line synchronization code 4003, the extension line check code 4004, and the extension line suffix code 4005 can be configured as needed, for the source of the transmitted data 1002. The USB valid data 1110 is also the management packet valid data 1210, which can also be configured to be different values; then, the extension line transmission encoding unit 4200 encodes the packetized transmission data packet 4110, and the encoding is performed to be sent to the cable. The code stream on 5 satisfies the characteristics of DC balance, and the available codes include 4B5B, 8B10B, 128B132B, and the like. The extension line transmission coding unit 4200 generates an encoded transmission packet 4001 that is transmitted to the extension line interface unit 6000. For each channel used, there is a separate extension line transmission processing unit 4000 at the transmitting end, that is, if two channels are used at the same time, it is necessary to simultaneously use the corresponding two extension lines to transmit the processing unit 4000.

As shown in FIG. 6, the extension line interface unit 6000 receives the extension line data packet 6001 from the cable 5 and generates the extension line reception data 5001 transmitted to the extension line reception processing unit 5000; meanwhile, the extension line interface unit 6000 receives the extension from The encoded transmission packet 4001 of the line transmission processing unit 4000 generates an extension line packet 6001 that is transmitted to the cable 5. It can be seen that the extension line data packet 6001 is bidirectional data transmitted on the cable 5, because in order to match the USB data transmission, the extension line transmission also adopts a half-duplex working mode.

As shown in FIG. 7, the extension line receiving processing unit 5000 internally includes an extension line receiving decoding unit 5100 and an extension line format unpacking unit 5200. The extension line reception decoding unit 5100 receives the reception data 5001 from the extension line interface unit 6000; corresponds to the inverse process of the extension line transmission coding unit 4200 inside the extension line transmission processing unit 4000, and the extension line reception decoding unit 5100 performs DC on the reception data 5001. Balance code decoding, get solution The received data packet 5110 after the code includes DCB balance patterns for decoding including 4B5B, 8B10B, 128B132B, and the like. Similarly, with the extension line format packing unit 4100 inside the extension line transmission processing unit 4000 as an inverse process, the extension line format unpacking unit 5200 performs unpacking of the decoded received data packet 5110 in an extended line format, that is, removes the received data packet 5110. The extension line solution prefix code 51p2, the extension line de-synchronization code 5103, the extension line de-check code 5104, the extension line solution suffix code 5105, etc., are generated after the unpacking is sent to the channel merging unit 2300 inside the USB transmission processing unit 2000. Receive data 2310. For each channel used, there is a respective extension line receiving processing unit 5000 at the receiving end, that is, if two channels are used at the same time, it is necessary to simultaneously use the corresponding two extension lines to receive the processing unit 5000.

The device for extending the transmission distance of the universal serial bus of the invention converts the data packet of the USB2.0 format by a device for extending the transmission distance of the USB2.0, so that the converted signal is suitable for transmission on the cable, and is multiplied. The transmission distance of USB2.0; at the same time, the device supports transmission in one channel and two channels in different specifications of cables, which increases the applicable range.

The device for extending the universal serial bus transmission distance takes the USB2.0 as an example, and can of course be backward compatible with USB1.1, and can be successfully applied to USB3.0 and USB3.1 through simple circuit replacement and parameter adjustment.

The above described device is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention should be determined by the scope of the claims. Any simple changes, equivalent substitutions, or decompositions of the above-described embodiments are still within the scope of the claimed invention.

In summary, the present invention fully meets the needs of industrial development in terms of structural design, practicality and cost-effectiveness, and the disclosed structure is also an unprecedented innovative structure, novel, creative, practical, and relevant. The application of new patent requirements, so file an application in accordance with the law.

Claims

The device for extending the transmission distance of the universal serial bus is characterized in that: the device for extending the transmission distance of the universal serial bus comprises a transmitting end device (3), a receiving end device (4) and a cable (5), and a transmitting device (1) connected to the transmitting device (3), the receiving device (2) is connected to the receiving device (4), and the transmitting device (3) is connected to the receiving device (4) via the cable (5), the transmitting device (3) and the receiving end device (4) respectively include a USB receiving processing unit (1000), a USB transmitting processing unit (2000), a USB interface unit (3000), an extension line transmitting processing unit (4000), and an extension line interface unit ( 6000) and an extension line receiving processing unit (5000), the USB interface unit (3000) receives the terminal USB data packet (3001) in USB format from the transmitting device (1) and the receiving device (2), and generates a transmission to the USB receiving process The pre-depacked data packet (1001) of the USB format of the unit (1000); the USB receiving processing unit (1000) generates the transmission data (1002) sent to the extension line transmission processing unit (4000); the extension line interface unit (6000) receives the reception data from The extension line transmits a transmission packet (4001) of the processing unit (4000), and generates a delay sent to the cable (5) Line data packet (6001); the extension line interface unit (6000) receives the extension line data packet (6001) from the cable (5) and generates extension line reception data (5001) sent to the extension line reception processing unit (5000) The extension line data packet (6001) is bidirectional data transmitted on the cable (5); the extension line reception processing unit (5000) generates extension line reception processing data (5002) sent to the USB transmission processing unit (2000), USB The interface unit (3000) receives the generated data packet (2001) in the USB format from the USB transmission processing unit (2000), and generates a terminal USB data packet (3001) in USB format transmitted to the transmitting device (1) and the receiving device (2). The USB format terminal USB data packet (3001) is bidirectional data transmitted on the USB cable, and the cable (5) is formed over a long distance.
The apparatus for extending the transmission distance of a universal serial bus according to claim 1, wherein said cable (5) is selectively used to communicate with one or two channels, and when only one channel is used for communication, the channel The signal rate above is twice the signal rate on each channel when communicating on two channels.
The apparatus for extending a universal serial bus transmission distance according to claim 1, wherein said USB receiving processing unit (1000) internally comprises a USB format unpacking unit (1100) and a channel dividing unit (1300), USB. The format unpacking unit (1100) receives the pre-demolition data packet (1001) of the USB format from the USB interface unit (3000), and unpacks the pre-demolition data packet (1001) of the USB format according to the USB data format, and removes the data packet (1001) from the USB format. The prefix valid code (1003) and the suffix code (1004) are followed by the USB valid data (1110) and sent to the channel dividing unit (1300), and the channel dividing unit (1300) generates USB transmission data transmitted to the USB transmission processing unit (2000) ( 1002); the USB transmission processing unit (2000) internally includes a USB format packing unit (2100) and a channel combining unit (2300), and the channel combining unit (2300) receives the extension line receiving processing data from the extension line receiving processing unit (5000) ( 5002), the USB format packing unit (2100) receives the received data (2310) from the channel combining unit (2300), and adds a new prefix code (2002) and a new suffix code (2003) to the received data (2310) according to the USB data format. Thereby, a generated data packet (2001) in a USB format is generated and transmitted to the USB interface unit (3000).
The apparatus for extending the transmission distance of a universal serial bus according to claim 1, wherein the USB receiving processing unit (1000) further comprises a management packet generating unit (1200) and a USB transmitting processing unit (2000). The inside also includes a management packet parsing unit (2200). At the transmitting end, the management packet generating unit (1200) inside the USB receiving processing unit (1000) generates management packet valid data (1210) and sends it to the channel dividing unit (1300). At the receiving end, the management packet parsing unit (2200) inside the USB transmission processing unit (2000) receives the management packet receiving data (2320) from the channel combining unit (2300) and performs parsing, and performs power consumption control on the circuit of the device. , state machine reset, re-execute USB link process, control USB pull-up and pull-down resistor on/off, notification management packet generation unit (1200) generates management packet to respond, and management packet generation unit in USB reception processing unit (1000) 1200) is used in combination with the management packet parsing unit (2200) in the USB transmission processing unit (2000), so that the USB low-frequency handshake signal that is not easy to be transmitted over a long distance becomes a high-frequency that is easy to transmit over long distances. Hand packet, the slow transfer into a fast transfer.
The apparatus for extending a universal serial bus transmission distance according to claim 1, wherein the extension line transmission processing unit (4000) internally includes an extension line format packing unit (4100) and an extension line transmission coding unit ( 4200), the extension line format packing unit (4100) receives the transmission data (1002) from the channel division unit (1300), adds an extension line prefix code (4002), an extension line synchronization code (4003), and extends the transmission data (1002). Line check code (4004) and extension line suffix code (4005), to obtain the packaged transmission data packet (4110), extension line prefix code (4002), extension line synchronization code (4003), extension line check code ( 4004) and the extension line suffix code (4005) are configured as needed, and the difference transmission data (1002) is derived from USB valid data (1110) or management packet valid data (1210) for configuration; then, the extension line transmission coding unit (4200) ) for the packaged send packet (4110) encoding, encoding so that the code stream transmitted to the cable (5) satisfies the DC balance, and the extension line transmission coding unit (4200) generates the encoded transmission packet sent to the extension line interface unit (6000). (4001), each channel has its own extension line transmission processing unit (4000) at the transmitting end. When two channels are used at the same time, the corresponding two extension lines are simultaneously used to transmit the processing unit (4000).
The apparatus for extending a universal serial bus transmission distance according to claim 1, wherein the extension line receiving processing unit (5000) internally comprises an extension line receiving decoding unit (5100) and an extension line format unpacking unit. (5200), the extension line receiving and decoding unit (5100) receives the received data (5001) from the extension line interface unit (6000), and performs DC balance code decoding on the received data (5001) to obtain a decoded received data packet (5110). Then, the extension line format unpacking unit (5200) performs unpacking of the decoded received data packet (5110) in an extended line format, and removes the extended line prefix prefix code (5102) in the received data packet (5110), and extends Line desynchronization code (5103), extension line de-check code (5104), extension line solution suffix code (5105), after unpacking, the channel merging unit (2300) sent to the USB transmission processing unit (2000) is received. Data (5002), for each channel used, there is a separate extension line receiving processing unit (5000) at the receiving end. When two channels are used at the same time, the corresponding two extended line receiving processing units are simultaneously used. (5000).
The apparatus for extending the transmission distance of a universal serial bus according to claims 1, 3, characterized in that, when only one channel is used and management packet transmission is not performed, the USB receiving processing unit (1000) internally includes a USB format. The packet unit (1100), the channel dividing unit (1300), and the USB transmission processing unit (2000) internally include a USB format packing unit (2100) and a channel combining unit (2300). At the transmitting end, the USB format unpacking unit (1100) receives The pre-depacked data packet (1001) of the USB format from the USB interface unit (3000) is unpacked according to the USB data format for the pre-removal data packet (1001) of the USB format, and the prefix code (1003) and the suffix code (1004) are removed therefrom. After the USB valid data (1110) is obtained and sent to the channel dividing unit (1300); the channel dividing unit (1300) receives the USB valid data (1110) from the USB format unpacking unit (1100), and directly transfers the USB valid data ( 1110) sent as the transmission data (1002) to the extension line transmission processing unit (4000), the channel division unit (1300) completes the data transmission, and at the receiving end, the channel merging unit (2300) directly receives the processing unit from the extension line (5000) Receive data (5 002) sent as the received data (2310) to the USB format packing unit (2100), the channel combining unit (2300) completes the data transfer; the USB format packing unit (2100) receives the connection from the channel combining unit (2300) Receiving data (2310), adding a new prefix code (2002) and a new suffix code (2003) to the received data (2310) according to the USB data format, thereby generating a generated data packet (2001) in a USB format and transmitting it to the USB interface unit (3000) ).
The apparatus for extending a universal serial bus transmission distance according to claims 1, 2, 3, characterized in that, when two channels are simultaneously used and management packet transmission is not performed, the USB reception processing unit (1000) internally includes The USB format unpacking unit (1100), the channel dividing unit (1300), and the USB sending processing unit (2000) internally include a USB format packing unit (2100), a channel combining unit (2300), and a USB format unpacking unit at the transmitting end ( 1100) receiving the pre-removed data packet (1001) of the USB format from the USB interface unit (3000), unpacking the pre-demolition data packet (1001) of the USB format according to the USB data format, and removing the prefix code (1003) and the suffix therefrom The code (1004) is followed by the USB valid data (1110) and sent to the channel dividing unit (1300); the channel dividing unit (1300) receives the USB valid data (1110) from the USB format unpacking unit (1100) and is in two channels. The average distribution is performed to obtain the transmission data of the respective channels (1002) and sent to the extension line transmission processing unit (4000) corresponding to the respective channels, and the channel division unit (1300) completes data division and data transmission, and at the receiving end, the channel is merged. Unit (230 0) Combine the two received data (5002) from the extension line receiving processing unit (5000) of the two channels, and send it as the received data (2310) to the USB format packing unit (2100), the channel combining unit (2300) Completing data merging and data transfer; the USB format packing unit (2100) receives the received data (2310) from the channel merging unit (2300), adds a new prefix code (2002) and a new suffix to the received data (2310) according to the USB data format. Code (2003), thereby generating a generated data packet (2001) in USB format and transmitting it to the USB interface unit (3000).
The apparatus for extending the transmission distance of a universal serial bus according to claims 1, 3 and 4, characterized in that only one channel is used and management packet transmission is performed, and the USB receiving processing unit (1000) internally includes a USB format unpacking The unit (1100), the management packet generating unit (1200), the channel dividing unit (1300), and the USB transmission processing unit (2000) internally include a USB format packing unit (2100), a management packet parsing unit (2200), and a channel merging unit (2300). At the transmitting end, the USB format unpacking unit (1100) receives the pre-depacked data packet (1001) of the USB format from the USB interface unit (3000), and performs the pre-demolition data packet (1001) of the USB format according to the USB data format. Unpacking, removing the prefix code (1003) and the suffix code (1004) therefrom to obtain USB valid data (1110) and transmitting to the channel dividing unit (1300); the management packet generating unit (1200) generates management packet valid data as needed (1210) ) And sent to the channel dividing unit (1300); the channel dividing unit (1300) receives USB valid data (1110) from the USB format unpacking unit (1100) and management packet valid data (1210) from the management packet generating unit (1200) The two data are selectively selected according to the need to obtain the transmission data (1002) and sent to the extension line transmission processing unit (4000). The channel division unit (1300) completes data selection and data transmission, and at the receiving end, the channel is merged. The unit (2300) receives the received data (5002) from the extension line receiving processing unit (5000) and identifies the data type, and when the data type of the received data is USB data, generates a reception sent to the USB format packing unit (2100). Data (2310), and when the data type of the received data is management packet data, the management packet receiving data sent to the management packet parsing unit (2200) is generated (2320), and the channel merging unit (2300) performs data type identification and data transfer. The USB format packing unit (2100) receives the received data (2310) from the channel combining unit (2300), and adds a new prefix code (2002) and a new suffix code (200) to the received data (2310) according to the USB data format. 3), thereby generating a generated data packet in the USB format (2001) and transmitting it to the USB interface unit (3000); the management packet parsing unit (2200) receives the management packet receiving data (2320) from the channel combining unit (2300) and parsing .
The apparatus for extending the transmission distance of a universal serial bus according to claims 1, 2, 3 and 4, characterized in that two channels are simultaneously used and management packet transmission is performed, and the USB receiving processing unit (1000) internally includes a USB. The format unpacking unit (1100), the management pack generating unit (1200), the channel dividing unit (1300), and the USB transmitting processing unit (2000) internally include a USB format packing unit (2100), a management pack parsing unit (2200), and a channel merge. Unit (2300), at the transmitting end, the USB format unpacking unit (1100) receives the pre-depacked data packet (1001) of the USB format from the USB interface unit (3000), and the pre-depacked data packet of the USB format according to the USB data format ( 1001) performing unpacking, removing the prefix code (1003) and the suffix code (1004) therefrom to obtain USB valid data (1110) and transmitting to the channel dividing unit (1300); the management packet generating unit (1200) generating the management package as needed The data (1210) is sent to the channel dividing unit (1300); the channel dividing unit (1300) receives the USB valid data (1110) from the USB format unpacking unit (1100) and the management pack from the management pack generating unit (1200) is valid. Data (1210), as needed The two data are selected one by one, and then the selected transmission data is evenly distributed between the two channels, and two transmission data (1002) are respectively sent to the corresponding extension line transmission processing unit (4000). The channel dividing unit (1300) performs data selection, data division, and data transmission, and receives End, the channel combining unit (2300) receives two received data (5002) from the corresponding extension line receiving processing unit (5000) of the two channels, first combining the two received data (5002) into one receiving data, and then The data type of the merged data is identified, that is, when the data type of the received data is USB data, then the received data sent to the USB format packing unit (2100) is generated (2310), and when the data type of the received data is the management pack data The management packet receiving data (2320) sent to the management packet parsing unit (2200) is generated, the channel merging unit (2300) completes data type identification, data merging, and data transfer, and the USB format packing unit (2100) receives the channel merging unit. The received data (2310) of (2300) adds a new prefix code (2002) and a new suffix code (2003) to the received data (2310) according to the USB data format, thereby generating a generated data packet (2001) in the USB format and transmitting it to the USB. The interface unit (3000); the management packet parsing unit (2200) receives the management packet reception data (2320) from the channel merging unit (2300) and performs parsing.