WO2015158156A1 - Dispositif pour étendre une distance de transmission de bus série universel - Google Patents

Dispositif pour étendre une distance de transmission de bus série universel Download PDF

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Publication number
WO2015158156A1
WO2015158156A1 PCT/CN2015/000188 CN2015000188W WO2015158156A1 WO 2015158156 A1 WO2015158156 A1 WO 2015158156A1 CN 2015000188 W CN2015000188 W CN 2015000188W WO 2015158156 A1 WO2015158156 A1 WO 2015158156A1
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WO
WIPO (PCT)
Prior art keywords
usb
unit
data
format
extension line
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PCT/CN2015/000188
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English (en)
Chinese (zh)
Inventor
丰斌
施鹏
梁科
王元龙
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天津瑞发科半导体技术有限公司
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Publication of WO2015158156A1 publication Critical patent/WO2015158156A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure

Definitions

  • 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.
  • USB Universal Serial Bus
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the management packet transmission is required to handle various abnormal situations, and the management package generation sheet is used.
  • 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.
  • 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.
  • 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.
  • 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 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.
  • FIG. 1 is a block diagram of an overall device for extending a universal serial bus transmission distance according to the present invention
  • FIG. 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.
  • FIG. 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.
  • FIG. 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
  • FIG. 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;
  • FIG. 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
  • 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
  • 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.
  • 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.
  • 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.
  • the signal rate on the channel is twice the signal rate when communicating with two channels;
  • 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.
  • 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.
  • 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.
  • the data packet 1001 is a USB2.0 format data packet.
  • 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.
  • a management pack is also transmitted.
  • 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.
  • 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.
  • 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.
  • the channel dividing unit 1300 generates transmission data 1002 that is transmitted to the extension line transmission processing unit 4000.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 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.

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  • General Engineering & Computer Science (AREA)
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Abstract

L'invention concerne un dispositif pour étendre la distance de transmission de bus série universel. Le dispositif comprend un dispositif d'extrémité de transmission (3), un dispositif d'extrémité de réception (4) et un câble (5). Le dispositif d'extrémité de transmission (3) et le dispositif d'extrémité de réception (4) comprennent chacun une unité de traitement de réception USB (1000), une unité de traitement de transmission USB (2000), une unité d'interface USB (3000), une unité de traitement de transmission par câble d'extension (4000), une unité d'interface de câble d'extension (6000) et une unité de traitement de réception par câble d'extension (5000). Le câble est formé dans un mode longue distance. Un progiciel de gestion du dispositif transmet des informations d'état entre le dispositif d'extrémité de transmission (3) et le dispositif d'extrémité de réception (4). Un ou deux canaux sont sélectionnés pour une communication dans le dispositif. Dans le dispositif, au moyen d'une conversion de format de données, des données de format USB qui ont besoin d'être transmises sont converties dans un format approprié pour une transmission dans le câble à longue distance au niveau de l'extrémité de transmission, et les données de format USB sont récupérées par conversion inverse au niveau de l'extrémité de réception, de telle sorte que la distance de transmission est étendue.
PCT/CN2015/000188 2014-04-17 2015-03-19 Dispositif pour étendre une distance de transmission de bus série universel WO2015158156A1 (fr)

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CN201410153848.8 2014-04-17
CN201410153848.8A CN103885918B (zh) 2014-04-17 2014-04-17 延长通用串行总线传输距离的装置

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CN113573265A (zh) * 2021-07-13 2021-10-29 江苏辰午节能科技股份有限公司 一种基于油田网电数字化设备的通用无线通讯模块

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US9843436B2 (en) * 2015-06-27 2017-12-12 Intel Corporation Flexible interconnect architecture
CN106250343B (zh) * 2016-08-30 2019-03-01 江苏沁恒股份有限公司 一种数字信号与usb信号混合传输装置及方法
CN106354682A (zh) * 2016-08-30 2017-01-25 江苏沁恒股份有限公司 一种数字信号与usb信号混合传输装置及方法
CN112527716B (zh) * 2020-12-18 2024-01-30 深圳市度申科技有限公司 基于usb3．0线材实现的数据传输方法、采集卡及系统

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Publication number Priority date Publication date Assignee Title
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