WO2012129848A1 - Procédé et appareil de simulation de dispositif de bus série universel (usb) - Google Patents

Procédé et appareil de simulation de dispositif de bus série universel (usb) Download PDF

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Publication number
WO2012129848A1
WO2012129848A1 PCT/CN2011/075829 CN2011075829W WO2012129848A1 WO 2012129848 A1 WO2012129848 A1 WO 2012129848A1 CN 2011075829 W CN2011075829 W CN 2011075829W WO 2012129848 A1 WO2012129848 A1 WO 2012129848A1
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WIPO (PCT)
Prior art keywords
usb
descriptor
bluetooth
terminal side
terminal
Prior art date
Application number
PCT/CN2011/075829
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English (en)
Chinese (zh)
Inventor
李幸远
Original Assignee
中兴通讯股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Publication of WO2012129848A1 publication Critical patent/WO2012129848A1/fr

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Classifications

    • 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
    • G06F13/10—Program control for peripheral devices
    • G06F13/105—Program control for peripheral devices where the programme performs an input/output emulation function
    • G06F13/107—Terminal emulation
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2213/00—Indexing scheme relating to interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F2213/0042—Universal serial bus [USB]

Definitions

  • the present invention relates to the field of communications and computers, and more particularly to a method and apparatus for simulating a universal serial bus device. Background technique
  • USB Universal Serial Bus
  • the so-called USB composite device refers to a plurality of USB sub-devices hung under one USB host device, and each USB sub-device uses several USB terminals to communicate with the PC (personal computer) side.
  • these USB sub-devices include Modem (modulation and demodulation equipment, multiple virtual serial ports, and NDIS (Network Device Interface Specification) network card devices.
  • USB endpoints are hardware resources and their number is limited.
  • the USB protocol stipulates that a USB controller has at most one bidirectional control endpoint and 15 pairs of data transmission endpoints, and the general USB device controller achieves a much lower number of USB endpoints than the maximum number of endpoints for cost reasons. Therefore, the limitation of hardware resources has caused the limitation of the number of USB composite device sub-devices, and the number of USB sub-devices and the function of adding USB sub-devices cannot be further expanded.
  • USB composite devices and their sub-device drivers require the development of the USB device provider.
  • the development of USB device drivers is complex and costly, extending the product development cycle. Summary of the invention
  • Embodiments of the present invention provide a method and apparatus for simulating a USB device, which are used to implement simulation of a USB composite device.
  • a method for simulating a USB device is applied to a terminal side, and the method includes:
  • the terminal side receives the USB device enumeration command sent by the PC side of the personal computer through the USB interface; the terminal side queries the local device descriptor and the configuration descriptor according to the USB device enumeration instruction, wherein the device descriptor and the configuration descriptor are based on the Bluetooth feature Set
  • the terminal side returns the queried device descriptor and configuration descriptor to the PC side through the USB interface.
  • a method of simulating a USB device, applied to a PC side the method comprising:
  • the PC sends a USB device enumeration instruction to the terminal side;
  • the PC side receives the device descriptor and the configuration descriptor returned by the USB device;
  • the PC side enumerates and recognizes the virtual Bluetooth controller through device descriptors and configuration descriptors.
  • a terminal device comprising:
  • An interface module including a USB interface, configured to receive, by using a USB interface, a USB device enumeration instruction sent by a PC side of the personal computer;
  • a virtual Bluetooth host module configured to query a local device descriptor and a configuration descriptor according to the USB device enumeration instruction, where the device descriptor and the configuration descriptor are set according to the Bluetooth feature; and, the interface module is instructed to the PC through the USB interface The side returns the queried device descriptor and configuration descriptor.
  • a computer device comprising:
  • An interface module configured to send a USB device enumeration instruction to the terminal side; and receive a device descriptor and a configuration descriptor returned by the USB device;
  • the device descriptor and the configuration descriptor are set in advance according to the Bluetooth feature, so that the PC side recognizes the USB device as a Bluetooth device when enumerating the USB device, and enumerates the Bluetooth device, thereby It realizes the simulation of the USB device with the Bluetooth device, so it can support more USB sub-devices according to the Bluetooth protocol in the subsequent communication, without being limited by the number of USB endpoints.
  • the Bluetooth driver since the Bluetooth protocol is used for communication, the Bluetooth driver is loaded, and the USB driver does not need to be loaded, thereby avoiding the problems caused by the USB driver.
  • FIG. 1 is a flowchart of a main method for simulating a USB device on a terminal side according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a main method for simulating a USB device on a PC side according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of a USB emulating USB according to an embodiment of the present invention; Detailed method flow chart of the device;
  • FIG. 4 is a flowchart of a method for pairing Bluetooth devices according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for service discovery according to an embodiment of the present invention.
  • FIG. 6 is a main structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 7 is a detailed structural diagram of a terminal device according to an embodiment of the present invention.
  • FIG. 8 is a structural diagram of a personal computer according to an embodiment of the present invention.
  • FIG. 9 is a schematic structural diagram of a virtual bluetooth controller module according to an embodiment of the present invention. detailed description
  • the device descriptor and the configuration descriptor are set in advance according to the Bluetooth feature, so that the PC side recognizes the USB device as a Bluetooth device when enumerating the USB device, and enumerates the Bluetooth device. Therefore, the USB device is simulated by the Bluetooth device, so the subsequent communication can be based on the Bluetooth protocol, and is not limited by the number of USB terminals, and can support more USB sub-devices. Moreover, since the Bluetooth protocol is used for communication, the Bluetooth driver is loaded, and the USB driver does not need to be loaded, thereby avoiding the problems caused by the USB driver.
  • the main method of simulating a USB device on the terminal side in this embodiment is as follows: After the terminal side is connected to the PC side through the USB interface, perform the following procedure.
  • Step 101 The terminal side receives the USB device enumeration instruction sent by the PC side of the personal computer through the USB interface.
  • Step 102 The terminal side queries the local device descriptor and the configuration descriptor according to the USB device enumeration instruction.
  • the device descriptor and the configuration descriptor are set according to the Bluetooth feature, and the value of the device descriptor and the configuration descriptor are pre-configured. In the terminal side.
  • Step 103 The terminal side returns the queried device descriptor and the configuration descriptor to the PC side through the USB interface.
  • the PC side After the terminal side sends the device descriptor and the configuration descriptor to the PC side, the PC side can recognize it as a Bluetooth device, and then can communicate through the Bluetooth protocol to implement simulation of the USB device.
  • Step 201 The PC side sends a USB device enumeration instruction to the terminal side.
  • Step 202 The PC side receives the device descriptor and the configuration descriptor returned by the USB device.
  • Step 203 The PC side enumerates and identifies the virtual Bluetooth controller by using the device descriptor and the configuration descriptor.
  • the terminal and the PC communicate with each other through a Bluetooth hardware device.
  • the USB device is simulated by Bluetooth. Therefore, the virtual Bluetooth-related devices such as the virtual Bluetooth controller are implemented by software.
  • the detailed method for simulating a USB device in this embodiment is as follows:
  • Step 301 The PC side sends a USB device enumeration instruction to the terminal side through the USB interface.
  • Step 303 The terminal side returns the enumerated data of the Bluetooth controller class USB device according to the Bluetooth protocol.
  • Step 305 The terminal side converts the queried Bluetooth type device descriptor and the configuration descriptor into a USB type device descriptor and a configuration descriptor according to the USB protocol.
  • the configuration descriptor in this embodiment includes a string descriptor, an interface descriptor, and an endpoint descriptor.
  • the device class field (bDeviceClass) in the device descriptor to OxEO, which means the wireless controller device class
  • the device subclass field (bDeviceSubClass) is set to 0x01, which means Bluetooth, ultra wideband (UWB, Ultra Wideband) ), Remote RNDIS (Remote NDIS) or Bluetooth AMP controller subclass
  • Device Protocol field (bDeviceProtocol) is set to 0x01, which means Bluetooth Controller Interface Protocol.
  • interface class field ( blnterfaceClass ) in the interface descriptor under the configuration description to OxEO, which means the wireless controller device class;
  • interface subclass field ( blnterfaceSubClass ) is set to 0x01 , which means Bluetooth, UWB, Remote RNDIS or Bluetooth AMP controller subclass;
  • interface protocol field (blnterfaceProtocol) is set to 0x01, which means Bluetooth controller interface protocol.
  • Step 306 The terminal side returns a USB type device descriptor and a configuration descriptor to the PC side through the USB interface.
  • Step 307 The PC side learns that the terminal side is a Bluetooth device by parsing the device descriptor and the configuration descriptor, and enumerates and identifies the virtual Bluetooth controller.
  • the PC side can also be equipped with a Bluetooth controller device driver for the device.
  • the PC device After the PC device recognizes the Bluetooth device, it can communicate with the terminal side through the Bluetooth protocol.
  • the Bluetooth device pairing and service discovery process are also required. See the following procedure.
  • Step 308 The PC side sends a pairing request to the terminal side, and completes the pairing process with the terminal side.
  • Step 310 The terminal side returns a Bluetooth specification identifier supported by the virtual bluetooth host.
  • the Bluetooth specification includes at least DUN (Dial-up Networking), serial port and PAN (Personal Area) Networking, personal office i or network) one of the features.
  • Step 311 The PC side performs function enumeration according to the DU, the serial port, and the PAN function identifier. That is, the PC side enumerates USB sub-devices such as a Modem port, a virtual serial port, and an NDIS network card device according to the DU identifier, the serial port identifier, and the PAN function identifier.
  • USB sub-devices such as a Modem port, a virtual serial port, and an NDIS network card device according to the DU identifier, the serial port identifier, and the PAN function identifier.
  • the PC obtains the detailed information of the virtual Bluetooth host in the terminal side through the pairing process, and enumerates the USB sub-device through the service discovery process.
  • the two processes are described in detail below.
  • the method for pairing Bluetooth devices in this embodiment is as follows:
  • Step 401 The PC side sends an Inquiry Scan command to the terminal side through an HCI (Host Controller Interface) command.
  • the PC side sends the Inquiry Scan command in a broadcast mode to scan the nearby Bluetooth host.
  • the terminal side is connected to the PC side through the USB interface. Therefore, the terminal side receives the Inquiry Scan command through the USB interface.
  • Step 402 The terminal side returns to the PC side the MAC carrying the virtual bluetooth host ( (Media
  • Inquiry Control HCI of the Access Control, Media Access Control Since the Bluetooth host in the terminal side is a Bluetooth host virtualized by software, there is no Bluetooth hardware device, so the MAC address can be a default MAC address pre-configured to the terminal.
  • Step 403 The terminal side returns an Inquiry Complete HCI event to the PC side.
  • the scanning process ends.
  • the PC side can further obtain detailed information of the terminal side virtual Bluetooth host, see the following process.
  • Step 404 The PC side issues a Remote Name Request HCI (remote name request HCI) command, and requests the terminal side to return the detailed information of the Bluetooth host.
  • HCI remote name request HCI
  • Step 405 The terminal side returns a Remote Name Request Complete HCI event with virtual Bluetooth host details.
  • the virtual Bluetooth host details include information such as the host name.
  • the PC side can also authenticate the virtual Bluetooth host on the terminal side. The process below.
  • Step 406 The PC side sends the pairing authentication password by using the HCI command.
  • Step 407 The terminal side returns an HCI event with successful authentication.
  • the method for service discovery in this embodiment is as follows:
  • Step 501 The PC side issues an ACL (Access Control List) data connection request.
  • ACL Access Control List
  • Step 502 The terminal side returns to create a connection successful HCI event, and returns a handle number of the newly created ACL connection.
  • Step 503 The PC side sends a request for querying the function of the device on the ACL connection.
  • Step 504 The terminal side returns an identifier of a function supported by the device on the ACL connection.
  • Features include DUN (Dial-up Networking), serial port functionality, and PAN (Personal Area Network) features.
  • Step 505 The PC side enumerates the USB sub-device according to the function identifier returned by the terminal side. For example, the Modem port, virtual serial port and NDIS network card device are listed.
  • the ACL data is transmitted using an endpoint Bulk (body) OUT and a Bulk IN endpoint.
  • the HCI command uses control endpoint transfers.
  • HCI events are transmitted using Interrupt IN endpoints.
  • the terminal device in this embodiment includes: an interface module 601 and a virtual Bluetooth host module 602.
  • the interface module 601 including the USB interface is used for transmitting various data, commands, and events with the PC side, such as receiving a USB device enumeration instruction sent by the PC side of the personal computer through the USB interface.
  • the virtual Bluetooth host module 602 is configured to query a local device descriptor and a configuration descriptor according to the USB device enumeration instruction, where the device descriptor and the configuration descriptor are set according to the Bluetooth feature; and, the indication interface module transmits the PC to the PC through the USB interface. Side return the queried device descriptor And configuration descriptors.
  • the virtual Bluetooth host module 602 is also used to generate various messages, events, and the like. Specifically, the interface module receives the USB type USB device enumeration instruction sent by the PC side through the USB interface.
  • the terminal device further includes: a virtual bluetooth controller module 603, as shown in FIG.
  • the virtual bluetooth controller module 603 is configured to return the enumerated data of the Bluetooth controller class USB device according to the Bluetooth protocol; and, according to the USB protocol, the query is performed.
  • the Bluetooth type device descriptor and configuration descriptor to be converted to a USB type device descriptor and configuration descriptor.
  • the interface module returns a USB type device descriptor and a configuration descriptor to the PC side through the USB interface.
  • the interface module 601 is further configured to receive a pairing request sent by the PC side and complete the pairing process with the PC side. Specifically, the interface module 601 receives the query scan Inquiry Scan command sent by the PC side through the HCI command, and returns a query result HCI Inquiry Result HCI event of the media access control MAC address carrying the virtual bluetooth host to the PC side; and returns a query to the PC side. Complete the HCI Inquiry Complete HCI event.
  • the interface module 601 is further configured to receive a service discovery request sent by the PC side, and return a DUN, a serial port, and a PAN function identifier supported by the virtual Bluetooth host.
  • the virtual Bluetooth host module 602 constitutes a Bluetooth host in the communication system. Provides modem, serial port and NIDS network card data transmission interface to the application layer of the terminal device. The data on the modem and the serial port are multiplexed using the RFCOMM (Wireless Frequency Communication) protocol of Bluetooth. It can support 63 Modem ports or serial ports. NDIS NIC data transmission is encapsulated by Bluetooth's BENP (Bluetooth Network Encapsulation Protocol) protocol. All data is sent and received in the ACL data frame for transmission using Bluetooth L2CAP (Logical Link Control and Adaptation Protocol).
  • BENP Bluetooth Network Encapsulation Protocol
  • the virtual Bluetooth controller module 603 causes the PC side to install the Bluetooth device driver for the USB device by setting the USB device descriptor and the USB configuration descriptor. And, the virtual Bluetooth controller module 603 provides an interface for transmitting HCI commands, HCI events, and ACL packets.
  • ACL data Use an endpoint Bulk OUT and a Bulk IN endpoint to transmit.
  • the HCI command uses control endpoint transfers. HCI events are transmitted using the Interrupt IN endpoint.
  • the internal structure of the virtual Bluetooth controller module 603 is shown in Figure 9.
  • the HCI command processing module completes receiving the HCI command sent by the Bluetooth host on the PC side, and after execution, returns the execution result of the command to the Bluetooth host on the PC side through the HCI event.
  • the SDP protocol module completes the processing of the SDP protocol request of the Bluetooth side of the PC side.
  • the serial port/Modem application interface provides access to the serial port and modem for the application layer of the wireless terminal.
  • the data sent and received by the upper layer is first multiplexed/demultiplexed by the RFCOMM protocol module for multiple serial port and modem ports, and then sent to the L2CAP protocol implementation module, and finally encapsulated in the ACL data packet to communicate with the PC side port.
  • the NIC application interface provides an interface for transmitting and receiving Ethernet frames to the application layer of the wireless terminal.
  • the Ethernet frame sent and received by the upper layer is first processed by the BENP protocol module, then sent to the L2CAP protocol implementation module, and finally encapsulated in the ACL packet to communicate with the PC side port.
  • the computer device in this embodiment includes:
  • the interface module 801 is configured to send a USB device enumeration instruction to the terminal side; and receive the device descriptor and the configuration descriptor returned by the USB device.
  • the Bluetooth Control Module 802 is used to enumerate and identify the virtual Bluetooth controller through device descriptors and configuration descriptors.
  • the Bluetooth Control Module 802 includes a Bluetooth host driver and a Bluetooth protocol stack.
  • the interface module 801 includes a USB interface, and sends a USB device enumeration instruction to the terminal side through the USB interface; and receives the device descriptor and the configuration descriptor returned by the USB device through the USB interface.
  • the Bluetooth control module 802 learns that the terminal side is a Bluetooth device by parsing the device descriptor and the configuration descriptor, and enumerates and recognizes the virtual Bluetooth controller.
  • the interface module 801 is further configured to send a pairing request to the terminal side, and complete the pairing process with the terminal side. Specifically, the interface module 801 sends an Inquiry Scan command to the terminal side through the HCI command, and receives an HCI Inquiry Result HCI event that carries the MAC address of the virtual Bluetooth host returned by the terminal side, and receives an HCI Inquiry Complete HCI event returned by the terminal side.
  • the interface module 801 is further configured to send a service discovery request to the terminal side, and receive a DUN, a serial port, and a PAN function identifier supported by the virtual bluetooth host returned by the terminal side.
  • the Bluetooth Control Module 802 is also used to enumerate functions based on DUN, serial port and PAN function identification.
  • the device descriptor and the configuration descriptor are set in advance according to the Bluetooth feature, so that the PC (personal computer) side recognizes the USB device as a Bluetooth device when the USB device needs to be enumerated, and performs the Bluetooth device on the Bluetooth device. enumerate. Therefore, the USB device is simulated by the Bluetooth device, so the subsequent communication can be based on the Bluetooth protocol, and is not limited by the number of USB endpoints, and can support more USB sub-devices. Moreover, since the Bluetooth protocol is used for communication, the Bluetooth driver is loaded, and the USB driver does not need to be loaded, thereby avoiding the problems caused by the USB driver. Embodiments of the present invention also provide an implementation of pairing and service discovery to implement a complete process from connection to service delivery.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can be embodied in the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.
  • These computer program instructions can also be stored in a bootable computer or other programmable data processing
  • the apparatus is readable in a computer readable memory in a particular manner, such that instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.

Abstract

La présente invention porte sur un procédé de simulation de dispositifs USB utilisé pour mettre en œuvre une simulation sur un dispositif USB composé. Ledit procédé comprend : par l'intermédiaire de l'interface USB, un côté terminal reçoit des instructions d'énumération de dispositif USB envoyées par un côté ordinateur personnel (PC), le côté terminal recherche des descripteurs de dispositif local et des descripteurs de configuration selon les instructions d'énumération de dispositif USB, les descripteurs de dispositif et les descripteurs de configuration étant établis en fonction de caractéristiques Bluetooth, le côté terminal renvoie le descripteur de dispositif et le descripteur de configuration recherchés au côté PC par l'intermédiaire de l'interface USB. Un appareil de mise en œuvre dudit procédé est également décrit. Selon la solution technique, une simulation sur le dispositif USB composé peut être mise en œuvre.
PCT/CN2011/075829 2011-04-01 2011-06-16 Procédé et appareil de simulation de dispositif de bus série universel (usb) WO2012129848A1 (fr)

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CN201110082228.6A CN102737003B (zh) 2011-04-01 2011-04-01 一种模拟usb设备的方法及装置
CN201110082228.6 2011-04-01

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CN104281542B (zh) * 2014-09-26 2017-12-05 中兴通讯股份有限公司 多功能usb终端设备的适配方法、装置及系统
CN106452838A (zh) * 2016-08-31 2017-02-22 广州视睿电子科技有限公司 Usb设备模拟装置及方法
CN108337209B (zh) * 2017-01-19 2021-05-04 深圳兆日科技股份有限公司 安全认证方法、装置以及对应的移动终端
CN111147476B (zh) * 2019-12-23 2022-04-29 上海乐普云智科技股份有限公司 一种数据解析方法
CN114218138A (zh) * 2021-11-30 2022-03-22 山东云海国创云计算装备产业创新中心有限公司 一种usb设备模拟装置及测试系统

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