CN114244485B - Data management method for USB signal long-distance transmission - Google Patents

Data management method for USB signal long-distance transmission Download PDF

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CN114244485B
CN114244485B CN202111474088.7A CN202111474088A CN114244485B CN 114244485 B CN114244485 B CN 114244485B CN 202111474088 A CN202111474088 A CN 202111474088A CN 114244485 B CN114244485 B CN 114244485B
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CN114244485A (en
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卢伟军
伍健庭
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Hefei Guiqian Information Technology Co ltd
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Vtron Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H04L5/0055—Physical resource allocation for ACK/NACK
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
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Abstract

本申请公开了一种USB信号远距离传输时的数据管理方法，包括：S1、数据管理装置将本地主机基于USB信号发送的IN包发送至远端主机；S2、远端主机在校验到IN包的CRC合格时，判断IN包是否为同步传输，若是，则执行S3，若否，则执行S4；S3、远端主机发送IN包至远端设备，并将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机；S4、远端主机发送IN包至远端设备，并判断远端设备返回的应答数据的CRC是否合格，若是则将应答数据通过数据管理装置发送至本地主机，否则通过数据管理装置发送NAK至本地主机。实现了远端设备和本地之间USB信号的IN包的远距离传输。

Figure 202111474088

This application discloses a data management method for long-distance transmission of USB signals, including: S1. The data management device sends the IN packet sent by the local host based on the USB signal to the remote host; S2. The remote host checks the IN packet. When the CRC of the packet is qualified, judge whether the IN packet is a synchronous transmission, if yes, execute S3, if not, execute S4; S3, the remote host sends the IN packet to the remote device, and sends the response data returned by the remote device To the data management device, so that the data management device forwards the response data to the local host; S4, the remote host sends an IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, and if so, passes the response data through The data management device sends to the local host, otherwise, the data management device sends NAK to the local host. The long-distance transmission of the IN packet of the USB signal between the remote device and the local is realized.

Figure 202111474088

Description

一种USB信号远距离传输时的数据管理方法A data management method for long-distance transmission of USB signals

技术领域technical field

本申请涉及USB技术领域，尤其涉及一种USB信号远距离传输时的数据管理方法。The present application relates to the technical field of USB, in particular to a data management method for long-distance transmission of USB signals.

背景技术Background technique

随着科技技术的进步，USB技术趋于成熟，同时USB信号也在众多领域得到了广泛应用。With the advancement of science and technology, USB technology tends to be mature, and USB signals have been widely used in many fields.

USB信号传输介质是电缆，一般情况下，因电缆损耗以及USB协议限制等原因，USB信号只能短距离传输，进而影响了USB信号长距离传输的应用。The USB signal transmission medium is a cable. Generally, due to cable loss and USB protocol limitations, USB signals can only be transmitted over short distances, which affects the application of long-distance transmission of USB signals.

因此，对USB信号进行管理，以实现远端设备和本地主机之间USB信号的IN包远距离传输，是本领域技术人员亟待解决的技术问题。Therefore, managing the USB signal to realize the long-distance transmission of the IN packet of the USB signal between the remote device and the local host is a technical problem to be solved urgently by those skilled in the art.

发明内容Contents of the invention

有鉴于此，本申请提供了一种USB信号远距离传输时的数据管理方法，实现了远端设备和本地之间USB信号的IN包的远距离传输。In view of this, the present application provides a data management method for long-distance transmission of USB signals, which realizes long-distance transmission of IN packets of USB signals between the remote device and the local.

本申请提供了一种USB信号远距离传输时的数据管理方法，应用于USB信号远距离传输时的数据管理系统，所述数据管理系统包括：远端主机和USB信号远距离传输时的数据管理装置，且所述数据管理装置和本地主机连接，所述远端主机上设置有远端设备；The present application provides a data management method during long-distance transmission of USB signals, which is applied to a data management system during long-distance transmission of USB signals. The data management system includes: remote host and data management during long-distance transmission of USB signals device, and the data management device is connected to a local host, and the remote host is provided with a remote device;

所述管理方法包括：The management methods include:

步骤S1、所述数据管理装置将所述本地主机基于USB信号发送的IN包发送至远端主机；Step S1, the data management device sends the IN packet sent by the local host based on the USB signal to the remote host;

步骤S2、所述远端主机在校验到所述IN包的CRC合格时，判断所述IN包是否为同步传输，若是，则执行步骤S3，若否，则执行步骤S4；Step S2, when the remote host checks that the CRC of the IN packet is qualified, it judges whether the IN packet is a synchronous transmission, if so, then execute step S3, if not, then execute step S4;

步骤S3、所述远端主机发送所述IN包至所述远端设备，并将所述远端设备返回的应答数据发送至所述数据管理装置，使得所述数据管理装置将所述应答数据转发至所述本地主机；Step S3, the remote host sends the IN packet to the remote device, and sends the response data returned by the remote device to the data management device, so that the data management device sends the response data Forward to said local host;

步骤S4、所述远端主机发送所述IN包至所述远端设备，并判断所述远端设备返回的应答数据的CRC是否合格，若是则将所述应答数据通过所述数据管理装置发送至所述本地主机，否则通过所述数据管理装置发送NAK至所述本地主机。Step S4, the remote host sends the IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, and if so, sends the response data through the data management device to the local host, otherwise, the data management device sends a NAK to the local host.

优选地，所述步骤S1之前还包括：Preferably, before the step S1, it also includes:

步骤S0、所述数据管理装置判断所述IN包的CRC是否合格，若是，回复NAK至所述本地主机后执行后续步骤。Step S0, the data management device judges whether the CRC of the IN packet is qualified, and if so, returns a NAK to the local host and executes subsequent steps.

优选地，所述步骤S3中的将所述远端设备返回的应答数据发送至所述数据管理装置，使得所述数据管理装置将所述应答数据转发至所述本地主机，具体包括：Preferably, in the step S3, sending the response data returned by the remote device to the data management device, so that the data management device forwards the response data to the local host, specifically includes:

所述远端主机将所述远端设备返回的应答数据发送至所述数据管理装置；The remote host sends the response data returned by the remote device to the data management device;

当所述数据管理装置再次接收到所述本地主机发送的所述IN包时，将所述应答数据返回至所述本地主机。When the data management device receives the IN packet sent by the local host again, it returns the response data to the local host.

优选地，所述步骤S4中通过所述数据管理装置发送NAK至所述本地主机，还包括：Preferably, in the step S4, sending the NAK to the local host through the data management device further includes:

所述远端主机重新发送所述IN包至所述远端设备；The remote host resends the IN packet to the remote device;

当获取到的所述远端设备返回的数据是NAK或STALL时，将所述NAK或STALL通过所述数据管理装置发送至所述本地主机。When the acquired data returned by the remote device is NAK or STALL, send the NAK or STALL to the local host through the data management device.

优选地，步骤S4中将所述应答数据通过所述数据管理装置发送至所述本地主机，还包括：Preferably, in step S4, sending the response data to the local host through the data management device further includes:

所述远端主机发送ACK至所述远端设备。The remote host sends an ACK to the remote device.

优选地，所述方法还包括：Preferably, the method also includes:

步骤S6、当所述数据管理装置判断到所述本地主机基于USB信号发送的OUT包和DATA包不是同步传输时，判断所述OUT包和所述DATA包对应的CRC是否合格，若是，则将所述OUT包和所述DATA包发送至所述远端主机；Step S6, when the data management device judges that the OUT packet and the DATA packet sent by the local host based on the USB signal are not transmitted synchronously, judge whether the CRC corresponding to the OUT packet and the DATA packet is qualified, and if so, send The OUT packet and the DATA packet are sent to the remote host;

步骤S7、所述远端主机判断所述OUT包和所述DATA包对应的CRC是否合格，若否，则通过所述数据管理装置发送数据错误至所述本地主机，若是则将所述OUT包和所述DATA包发送至所述远端设备；Step S7, the remote host judges whether the CRC corresponding to the OUT packet and the DATA packet is qualified, if not, then sends a data error to the local host through the data management device, and if so, sends the OUT packet and sending the DATA packet to the remote device;

步骤S8、所述远端主机在判断到所述OUT包和所述DATA包不是同步传输时，将所述远端设备返回的应答数据通过所述数据管理装置发送至所述本地主机。Step S8, when the remote host determines that the OUT packet and the DATA packet are not transmitted synchronously, send the response data returned by the remote device to the local host through the data management device.

优选地，所述方法还包括：Preferably, the method also includes:

步骤S5、当所述数据管理装置判断到所述本地主机基于USB信号发送的OUT包和DATA包是同步传输时，不返回任何信息至所述本地主机。Step S5. When the data management device determines that the OUT packet and the DATA packet sent by the local host based on the USB signal are transmitted synchronously, no information is returned to the local host.

优选地，步骤S6中的判断所述OUT包和所述DATA包对应的CRC是否合格，若是，则将所述OUT包和所述DATA包发送至所述远端主机，具体包括：Preferably, in step S6, it is judged whether the CRC corresponding to the OUT packet and the DATA packet is qualified, and if so, the OUT packet and the DATA packet are sent to the remote host, specifically including:

判断所述OUT包和所述DATA包对应的CRC是否合格；Judging whether the CRC corresponding to the OUT packet and the DATA packet is qualified;

若是，则将所述OUT包和所述DATA包发送至所述远端主机；If so, then send the OUT packet and the DATA packet to the remote host;

若否，则不转发所述OUT包和所述DATA包至所述远端主机，且也不回复任何信息至所述本地主机。If not, the OUT packet and the DATA packet are not forwarded to the remote host, and no information is returned to the local host.

优选地，所述方法还包括：Preferably, the method also includes:

步骤S9、当所述数据管理装置获取到所述本地主机基于USB信号发送的SETUP包和DATA包时，判断所述SETUP包和所述DATA包的CRC是否合格，若是，则将所述SETUP包和所述DATA包发送至所述远端主机；Step S9, when the data management device obtains the SETUP packet and the DATA packet sent by the local host based on the USB signal, judge whether the CRC of the SETUP packet and the DATA packet is qualified, and if so, send the SETUP packet and sending the DATA packet to the remote host;

步骤S10、所述远端主机判断所述SETUP包和所述DATA包的CRC是否合格，若是，则将所述SETUP包和所述DATA包发送至所述远端设备，并将所述远端设备发送的ACK通过所述数据管理装置发送至所述本地主机。Step S10, the remote host judges whether the CRC of the SETUP packet and the DATA packet is qualified, and if so, sends the SETUP packet and the DATA packet to the remote device, and sends the remote The ACK sent by the device is sent to the local host through the data management device.

优选地，所述步骤S10具体包括：Preferably, the step S10 specifically includes:

所述远端主机判断所述SETUP包和所述DATA包的CRC是否合格；The remote host judges whether the CRC of the SETUP packet and the DATA packet is qualified;

若是，则将所述SETUP包和所述DATA包发送至所述远端设备，并将所述远端设备发送的ACK通过所述数据管理装置发送至所述本地主机；If yes, send the SETUP packet and the DATA packet to the remote device, and send the ACK sent by the remote device to the local host through the data management device;

若否，则通过数据管理装置发送数据的重新获取指令至所述本地主机。If not, a data re-acquisition instruction is sent to the local host through the data management device.

从以上技术方案可以看出，本申请具有以下优点：As can be seen from the above technical solutions, the present application has the following advantages:

本申请提供了一种USB信号远距离传输时的数据管理方法，包括：步骤S1、数据管理装置将本地主机基于USB信号发送的IN包发送至远端主机；步骤S2、远端主机在校验到IN包的CRC合格时，判断IN包是否为同步传输，若是，则执行步骤S3，若否，则执行步骤S4；步骤S3、远端主机发送IN包至远端设备，并将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机；步骤S4、远端主机发送IN包至远端设备，并判断远端设备返回的应答数据的CRC是否合格，若是则将应答数据通过数据管理装置发送至本地主机，否则通过数据管理装置发送NAK至本地主机。本申请中通过数据管理装置和远端主机的配合，实现了远端设备和本地之间USB信号的IN包的远距离传输。The application provides a data management method for long-distance transmission of USB signals, including: step S1, the data management device sends the IN packet sent by the local host based on the USB signal to the remote host; step S2, the remote host checks When the CRC of the IN packet is qualified, judge whether the IN packet is a synchronous transmission, if so, then execute step S3, if not, then execute step S4; step S3, the remote host sends the IN packet to the remote device, and the remote device The returned response data is sent to the data management device, so that the data management device forwards the response data to the local host; step S4, the remote host sends an IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, If yes, send the response data to the local host through the data management device, otherwise send NAK to the local host through the data management device. In this application, through the cooperation of the data management device and the remote host, the long-distance transmission of the IN packet of the USB signal between the remote device and the local is realized.

附图说明Description of drawings

图1为本实施例中一种USB信号远距离传输时的数据管理系统的结构示意图；Fig. 1 is the structural representation of the data management system when a kind of USB signal long-distance transmission in the present embodiment;

图2为本实施例中一种USB信号远距离传输时的数据管理系统使用时的通信连接图；Fig. 2 is the communication connection figure when the data management system of a kind of USB signal long-distance transmission in the present embodiment is used;

图3为本申请实施例中一种USB信号远距离传输时的数据管理方法的第一实施例的流程示意图；3 is a schematic flowchart of a first embodiment of a data management method during long-distance transmission of a USB signal in an embodiment of the present application;

图4为本申请实施例中一种USB信号远距离传输时的数据管理方法的第二实施例的流程示意图；4 is a schematic flowchart of a second embodiment of a data management method during long-distance transmission of a USB signal in an embodiment of the present application;

图5本申请实施例中SETUP包的传输流程图；The transmission flow chart of SETUP bag in the embodiment of Fig. 5 present application;

图6为本申请实施例中数据管理装置侧IN包的传输示意图；FIG. 6 is a schematic diagram of the transmission of IN packets on the data management device side in the embodiment of the present application;

图7为本申请实施例中远端主机侧IN包的传输示意图；7 is a schematic diagram of the transmission of the remote host side IN packet in the embodiment of the present application;

图8为本申请实施例中数据管理装置侧OUT包的传输示意图；FIG. 8 is a schematic diagram of transmission of OUT packets on the data management device side in the embodiment of the present application;

图9为本申请实施例中远端主机侧OUT包的传输示意图。FIG. 9 is a schematic diagram of transmission of an OUT packet at the remote host side in an embodiment of the present application.

具体实施方式Detailed ways

本申请实施例提供了一种USB信号远距离传输时的数据管理方法，实现了远端设备和本地之间USB信号的IN包的远距离传输。The embodiment of the present application provides a data management method for long-distance transmission of USB signals, which realizes long-distance transmission of IN packets of USB signals between a remote device and a local device.

为了使本技术领域的人员更好地理解本申请方案，下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。In order to enable those skilled in the art to better understand the solution of the application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

本申请实施例中一种USB信号远距离传输时的数据管理方法应用于一种USB信号远距离传输时的数据管理系统，如图1和图2所示，本实施例中的数据管理系统包括：远端主机和USB信号远距离传输时的数据管理装置，其中数据管理装置和本地主机连接，远端主机上设置有远端设备，本实施例针对不同的事务做出不同的应答，让本地主机的USB信号顺利传输到远端主机，再由远端主机下发接收的数据到远端设备，这样就延长了一次USB事务在协议上限制的时间，从而达到USB信号长距离传输的目的。In the embodiment of the present application, a data management method for long-distance transmission of USB signals is applied to a data management system for long-distance transmission of USB signals, as shown in Figures 1 and 2, the data management system in this embodiment includes : the data management device when the remote host and USB signal are transmitted over a long distance, wherein the data management device is connected with the local host, and the remote host is provided with a remote device. This embodiment makes different responses for different affairs, so that the local The host's USB signal is successfully transmitted to the remote host, and then the remote host sends the received data to the remote device, which prolongs the time limited by the protocol for a USB transaction, thereby achieving the purpose of long-distance USB signal transmission.

具体地，对于上述数据管理系统对应的数据管理方法进行如下说明：Specifically, the data management method corresponding to the above data management system is described as follows:

请参阅图3，图3为本申请实施例中一种USB信号远距离传输时的数据管理方法的第一实施例的流程示意图。Please refer to FIG. 3 . FIG. 3 is a schematic flowchart of a first embodiment of a data management method during long-distance transmission of USB signals in the embodiment of the present application.

本实施例中的一种USB信号远距离传输时的数据管理方法包括：A data management method during long-distance transmission of USB signals in this embodiment includes:

步骤301、数据管理装置将本地主机基于USB信号发送的IN包发送至远端主机。Step 301, the data management device sends the IN packet sent by the local host based on the USB signal to the remote host.

步骤302、远端主机在校验到IN包的CRC合格时，判断IN包是否为同步传输，若是，则执行步骤303，若否，则执行步骤304。Step 302, when the remote host checks that the CRC of the IN packet is qualified, it judges whether the IN packet is a synchronous transmission, if yes, executes step 303, and if not, executes step 304.

步骤303、远端主机发送IN包至远端设备，并将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机。Step 303, the remote host sends an IN packet to the remote device, and sends the response data returned by the remote device to the data management device, so that the data management device forwards the response data to the local host.

步骤304、远端主机发送IN包至远端设备，并判断远端设备返回的应答数据的CRC是否合格，若是则将应答数据通过数据管理装置发送至本地主机，否则通过数据管理装置发送NAK至本地主机。Step 304, the remote host sends an IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, if so, sends the response data to the local host through the data management device, otherwise sends NAK to the remote device through the data management device local host.

本实施例中的USB信号远距离传输时的数据管理方法包括：步骤S1、数据管理装置将本地主机基于USB信号发送的IN包发送至远端主机；步骤S2、远端主机在校验到IN包的CRC合格时，判断IN包是否为同步传输，若是，则执行步骤S3，若否，则执行步骤S4；步骤S3、远端主机发送IN包至远端设备，并将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机；步骤S4、远端主机发送IN包至远端设备，并判断远端设备返回的应答数据的CRC是否合格，若是则将应答数据通过数据管理装置发送至本地主机，否则通过数据管理装置发送NAK至本地主机。本申请中通过数据管理装置和远端主机的配合，实现了远端设备和本地之间USB信号的IN包的远距离传输。The data management method when the USB signal in this embodiment is transmitted over a long distance includes: step S1, the data management device sends the IN packet sent by the local host based on the USB signal to the remote host; When the CRC of the packet is qualified, it is judged whether the IN packet is a synchronous transmission, if so, then execute step S3, if not, then execute step S4; step S3, the remote host sends the IN packet to the remote device, and the remote device returns The response data is sent to the data management device, so that the data management device forwards the response data to the local host; step S4, the remote host sends an IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, and if so, then Send the response data to the local host through the data management device, or send NAK to the local host through the data management device. In this application, through the cooperation of the data management device and the remote host, the long-distance transmission of the IN packet of the USB signal between the remote device and the local is realized.

以上为本申请实施例提供的一种USB信号远距离传输时的数据管理方法的第一实施例，以下为本申请实施例提供的一种USB信号远距离传输时的数据管理方法的第二实施例。The above is the first embodiment of a data management method for USB signal long-distance transmission provided by the embodiment of the present application, and the following is the second implementation of the data management method for USB signal long-distance transmission provided by the embodiment of the present application example.

请参阅图4，本申请实施例中一种USB信号远距离传输时的数据管理方法的实施例的流程示意图。Please refer to FIG. 4 , which is a schematic flowchart of an embodiment of a data management method during long-distance transmission of USB signals in the embodiment of the present application.

本实施例中的一种USB信号远距离传输时的数据管理方法包括：A data management method during long-distance transmission of USB signals in this embodiment includes:

步骤401、数据管理装置判断IN包的CRC是否合格，若是，回复NAK至本地主机后执行后续步骤。Step 401 , the data management device judges whether the CRC of the IN packet is qualified, and if so, returns a NAK to the local host and executes subsequent steps.

步骤402、数据管理装置将本地主机基于USB信号发送的IN包发送至远端主机。Step 402, the data management device sends the IN packet sent by the local host based on the USB signal to the remote host.

步骤403、远端主机在校验到IN包的CRC合格时，判断IN包是否为同步传输，若是，则执行步骤404，若否，则执行步骤405。Step 403, when the remote host checks that the CRC of the IN packet is qualified, it judges whether the IN packet is a synchronous transmission, if yes, executes step 404, and if not, executes step 405.

步骤404、远端主机发送IN包至远端设备，并将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机。Step 404, the remote host sends an IN packet to the remote device, and sends the response data returned by the remote device to the data management device, so that the data management device forwards the response data to the local host.

具体地，本实施例中的步骤404中的将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机，具体包括：Specifically, in step 404 in this embodiment, sending the response data returned by the remote device to the data management device, so that the data management device forwards the response data to the local host, specifically includes:

远端主机将远端设备返回的应答数据发送至数据管理装置；The remote host sends the response data returned by the remote device to the data management device;

当数据管理装置再次接收到本地主机发送的IN包时，将应答数据返回至本地主机。When the data management device receives the IN packet sent by the local host again, it returns the response data to the local host.

步骤405、远端主机发送IN包至远端设备，并判断远端设备返回的应答数据的CRC是否合格，若是则将应答数据通过数据管理装置发送至本地主机，否则通过数据管理装置发送NAK至本地主机。Step 405, the remote host sends an IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, if so, sends the response data to the local host through the data management device, otherwise sends NAK to the remote device through the data management device local host.

具体地，步骤405中的通过数据管理装置发送NAK至本地主机，还包括：Specifically, sending the NAK to the local host through the data management device in step 405 also includes:

远端主机重新发送IN包至远端设备；The remote host resends the IN packet to the remote device;

当获取到的远端设备返回的数据是NAK或STALL时，将NAK或STALL通过数据管理装置发送至本地主机。When the acquired data returned by the remote device is NAK or STALL, send the NAK or STALL to the local host through the data management device.

进一步地，步骤405中的将应答数据通过数据管理装置发送至本地主机，还包括：Further, sending the response data to the local host through the data management device in step 405 also includes:

远端主机发送ACK至远端设备。The remote host sends an ACK to the remote device.

步骤406、当数据管理装置判断到本地主机基于USB信号发送的OUT包和DATA包是同步传输时，不返回任何信息至本地主机。Step 406: When the data management device determines that the OUT packet and the DATA packet sent by the local host based on the USB signal are transmitted synchronously, no information is returned to the local host.

步骤407、当数据管理装置判断到本地主机基于USB信号发送的OUT包和DATA包不是同步传输时，判断OUT包和DATA包对应的CRC是否合格，若是，则将OUT包和DATA包发送至远端主机。Step 407, when the data management device judges that the OUT packet and the DATA packet sent by the local host based on the USB signal are not synchronously transmitted, it is judged whether the CRC corresponding to the OUT packet and the DATA packet is qualified, and if so, the OUT packet and the DATA packet are sent to the remote end host.

具体地，步骤407中的判断OUT包和DATA包对应的CRC是否合格，若是，则将OUT包和DATA包发送至远端主机，具体包括：Specifically, in step 407, it is judged whether the CRC corresponding to the OUT packet and the DATA packet is qualified, and if so, the OUT packet and the DATA packet are sent to the remote host, specifically including:

判断OUT包和DATA包对应的CRC是否合格；Determine whether the CRC corresponding to the OUT package and the DATA package is qualified;

若是，则将OUT包和DATA包发送至远端主机；If so, send the OUT packet and DATA packet to the remote host;

若否，则不转发OUT包和DATA包至远端主机，且也不回复任何信息至本地主机。If not, the OUT packet and DATA packet will not be forwarded to the remote host, and no information will be replied to the local host.

步骤408、远端主机判断OUT包和DATA包对应的CRC是否合格，若否，则通过数据管理装置发送数据错误至本地主机，若是则将OUT包和DATA包发送至远端设备。Step 408, the remote host judges whether the CRC corresponding to the OUT packet and the DATA packet is qualified, if not, sends a data error to the local host through the data management device, and if so, sends the OUT packet and the DATA packet to the remote device.

步骤409、远端主机在判断到OUT包和DATA包不是同步传输时，将远端设备返回的应答数据通过数据管理装置发送至本地主机。Step 409 , when the remote host determines that the OUT packet and the DATA packet are not transmitted synchronously, it sends the response data returned by the remote device to the local host through the data management device.

通过步骤406至步骤409的描述可以知道，本实施例中还通过数据管理装置和远端主机的配合，实现了远端设备和本地之间USB信号的OUT包的远距离传输。It can be seen from the description of steps 406 to 409 that in this embodiment, the long-distance transmission of the OUT packet of the USB signal between the remote device and the local is realized through the cooperation of the data management device and the remote host.

步骤410、当数据管理装置获取到本地主机基于USB信号发送的SETUP包和DATA包时，判断SETUP包和DATA包的CRC是否合格，若是，则将SETUP包和DATA包发送至远端主机。Step 410, when the data management device obtains the SETUP packet and the DATA packet sent by the local host based on the USB signal, judge whether the CRC of the SETUP packet and the DATA packet is qualified, and if so, send the SETUP packet and the DATA packet to the remote host.

步骤411、远端主机判断SETUP包和DATA包的CRC是否合格，若是，则将SETUP包和DATA包发送至远端设备，并将远端设备发送的ACK通过数据管理装置发送至本地主机。Step 411, the remote host judges whether the CRC of the SETUP packet and the DATA packet is qualified, and if so, sends the SETUP packet and the DATA packet to the remote device, and sends the ACK sent by the remote device to the local host through the data management device.

具体地，步骤411具体包括：Specifically, step 411 specifically includes:

步骤S10具体包括：Step S10 specifically includes:

远端主机判断SETUP包和DATA包的CRC是否合格；The remote host judges whether the CRC of the SETUP package and the DATA package is qualified;

若是，则将SETUP包和DATA包发送至远端设备，并将远端设备发送的ACK通过数据管理装置发送至本地主机；If so, send the SETUP package and the DATA package to the remote device, and send the ACK sent by the remote device to the local host through the data management device;

若否，则通过数据管理装置发送数据的重新获取指令至本地主机。If not, a data re-acquisition instruction is sent to the local host through the data management device.

通过步骤410至步骤411的描述可以知道，本实施例中还通过数据管理装置和远端主机的配合，实现了远端设备和本地之间USB信号的SETUP包的远距离传输。It can be seen from the description of steps 410 to 411 that in this embodiment, the long-distance transmission of the SETUP packet of the USB signal between the remote device and the local is realized through the cooperation of the data management device and the remote host.

为了便于理解，本实施例中将上述SETUP事务、OUT事务和IN事务针对管理系统中的各侧分别说明如下：For ease of understanding, in this embodiment, the above-mentioned SETUP transaction, OUT transaction and IN transaction are respectively described for each side in the management system as follows:

1)SETUP事务：1) SETUP transaction:

如图5所示，在SETUP事务中，数据管理装置接收到本地主机的SETUP包和DATA包，校验CRC是否正确，当CRC错误，不回复本地主机，也不转发给远端主机；当CRC正确时，在接收完DATA数据后，回复ACK给本地主机，并把SETUP包和DATA包数据转发给远端主机；远端主机接收到本地传输的数据，校验CRC，当CRC错误，要求本地主机重传；当CRC正确则发送数据给远端设备，并接收远端设备回复的ACK给数据管理装置，数据管理装置接收到ACK后丢弃。As shown in Figure 5, in the SETUP transaction, the data management device receives the SETUP packet and the DATA packet of the local host, and checks whether the CRC is correct. When the CRC is wrong, it does not reply to the local host or forward it to the remote host; when the CRC When it is correct, after receiving the DATA data, reply ACK to the local host, and forward the SETUP packet and DATA packet data to the remote host; the remote host receives the locally transmitted data, checks the CRC, and when the CRC is wrong, requests the local host The host retransmits; when the CRC is correct, it sends the data to the remote device, and receives the ACK replied by the remote device to the data management device, and the data management device discards it after receiving the ACK.

2)IN事务：2) IN transaction:

如图6所示，数据管理装置接收到本地主机的IN包，判断是否是同步传输，当是同步传输时，如果接收到远端主机返回的信息，则把信息回复给本地主机，如果没有信息，则不返回任何信息给本地主机；非同步传输时，检验数据CRC是否错，CRC错误，不转发IN包给远端主机，当CRC正确，回复NAK给本地主机，并转发IN包给远端主机，等待远端主机返回数据，当收到远端主机返回的数据时，再次收到本地主机IN包时，把收到的远端主机返回的数据转发给本地主机，等待本地主机回复ACK，如果不回复，则等待下一次IN包，把数据重传，如果回复，丢弃不转发给远端主机。As shown in Figure 6, the data management device receives the IN packet from the local host and judges whether it is a synchronous transmission. When it is synchronous transmission, if it receives the information returned by the remote host, it replies the information to the local host. , it will not return any information to the local host; during asynchronous transmission, check whether the CRC of the data is wrong, if the CRC is wrong, do not forward the IN packet to the remote host, when the CRC is correct, reply NAK to the local host, and forward the IN packet to the remote host The host waits for the data returned by the remote host. When receiving the data returned by the remote host and receiving the IN packet from the local host again, it forwards the received data returned by the remote host to the local host and waits for the local host to reply ACK. If there is no reply, it will wait for the next IN packet and retransmit the data. If it replies, it will be discarded and not forwarded to the remote host.

如图7所示，远端主机接收到数据管理装置转发的IN包，检验CRC，CRC错误，反馈给本地主机，要求重传；CRC正确后进行缓存，判断是否是同步传输，是同步传输，转发IN包给远端设备，等待远端设备返回数据包，未超时直接转发给数据管理装置，超时告知数据管理装置。非同步传输时，并转发IN包给远端设备，等待远端设备返回数据包，判断返回的数据包CRC是否正确，正确则转发给数据管理装置并返回ACK给远端设备，CRC不正确，返回NAK并重新转发IN包给远端设备；如远端设备返回的是NAK或STALL，直接转发给数据管理装置。As shown in Figure 7, the remote host receives the IN packet forwarded by the data management device, checks the CRC, and if the CRC is wrong, it feeds back to the local host and requires retransmission; after the CRC is correct, it caches and judges whether it is synchronous transmission or not. Forwarding the IN packet to the remote device, waiting for the remote device to return the data packet, directly forwarding the IN packet to the data management device before timeout, and notifying the data management device of the timeout. During asynchronous transmission, forward the IN packet to the remote device, wait for the remote device to return the data packet, and judge whether the CRC of the returned data packet is correct. If it is correct, it will forward it to the data management device and return ACK to the remote device. If the CRC is incorrect, Return NAK and re-transmit the IN packet to the remote device; if the remote device returns NAK or STALL, it will be directly forwarded to the data management device.

3)OUT事务：3) OUT transaction:

如图8所示，数据管理装置接收到本地主机的OUT包和DATA包，判断是否是同步传输，当是同步传输时，不返回任何信息给本地主机；非同步传输时，检验CRC是否错，CRC错误，不转发OUT包和DATA包给远端主机，也不回复本地主机；当CRC正确，数据管理装置在接收完DATA包后返回NAK给本地主机，并传输OUT包和DATA包给远端主机，等待远端主机返回数据，当收到远端主机返回数据时，再次收到本地主机OUT包和DATA包时，在接收DATA包后把远端主机返回的数据转发给本地主机。As shown in Figure 8, the data management device receives the OUT packet and the DATA packet of the local host, and judges whether it is a synchronous transmission. When it is a synchronous transmission, it does not return any information to the local host; during asynchronous transmission, it checks whether the CRC is wrong. CRC error, do not forward the OUT packet and DATA packet to the remote host, nor reply to the local host; when the CRC is correct, the data management device returns NAK to the local host after receiving the DATA packet, and transmits the OUT packet and DATA packet to the remote host The host waits for the remote host to return data. When receiving the data returned by the remote host and receiving the local host OUT packet and DATA packet again, it forwards the data returned by the remote host to the local host after receiving the DATA packet.

如图9所示，远端主机接收到数据管理装置转发的OUT包和DATA包，检验CRC，当CRC错误，反馈给本地，要求重传；CRC正确后进行缓存，转发OUT包和DATA包给远端设备，判断是否是同步传输，是同步传输，结束本次事务。非同步传输时，等待远端设备返回数据包，直接转发给数据管理装置，如超时还没接收到数据返回，则向数据管理装置返回NAK。如果设备拔走，向数据管理装置回复ERROR。As shown in Figure 9, the remote host receives the OUT packet and the DATA packet forwarded by the data management device, and checks the CRC. When the CRC is wrong, it feeds back to the local and requests retransmission; after the CRC is correct, it caches and forwards the OUT packet and the DATA packet to the The remote device judges whether it is a synchronous transmission, and if it is a synchronous transmission, ends this transaction. During asynchronous transmission, wait for the remote device to return the data packet, and forward it directly to the data management device. If the data is not received after the timeout, return NAK to the data management device. If the device is unplugged, return ERROR to the data management device.

本实施例中的USB信号远距离传输时的数据管理方法包括：步骤S1、数据管理装置将本地主机基于USB信号发送的IN包发送至远端主机；步骤S2、远端主机在校验到IN包的CRC合格时，判断IN包是否为同步传输，若是，则执行步骤S3，若否，则执行步骤S4；步骤S3、远端主机发送IN包至远端设备，并将远端设备返回的应答数据发送至数据管理装置，使得数据管理装置将应答数据转发至本地主机；步骤S4、远端主机发送IN包至远端设备，并判断远端设备返回的应答数据的CRC是否合格，若是则将应答数据通过数据管理装置发送至本地主机，否则通过数据管理装置发送NAK至本地主机。本申请中通过数据管理装置和远端主机的配合，实现了远端设备和本地之间USB信号包(IN包、OUT包和SETUP包)的远距离传输。The data management method when the USB signal in this embodiment is transmitted over a long distance includes: step S1, the data management device sends the IN packet sent by the local host based on the USB signal to the remote host; When the CRC of the packet is qualified, it is judged whether the IN packet is a synchronous transmission, if so, then execute step S3, if not, then execute step S4; step S3, the remote host sends the IN packet to the remote device, and the remote device returns The response data is sent to the data management device, so that the data management device forwards the response data to the local host; step S4, the remote host sends an IN packet to the remote device, and judges whether the CRC of the response data returned by the remote device is qualified, and if so, then Send the response data to the local host through the data management device, or send NAK to the local host through the data management device. In this application, the long-distance transmission of USB signal packets (IN packet, OUT packet and SETUP packet) between the remote device and the local is realized through the cooperation of the data management device and the remote host.

本申请的说明书及上述附图中的术语“第一”、“第二”、“第三”、“第四”等(如果存在)是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的本申请的实施例例如能够以除了在这里图示或描述的那些以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或单元的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或单元，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或单元。The terms "first", "second", "third", "fourth", etc. (if any) in the description of the present application and the above drawings are used to distinguish similar objects and not necessarily to describe specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein, for example, can be practiced in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a sequence of steps or elements is not necessarily limited to the expressly listed instead, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

应当理解，在本申请中，“至少一个(项)”是指一个或者多个，“多个”是指两个或两个以上。“和/或”，用于描述关联对象的关联关系，表示可以存在三种关系，例如，“A和/或B”可以表示：只存在A，只存在B以及同时存在A和B三种情况，其中A，B可以是单数或者复数。字符“/”一般表示前后关联对象是一种“或”的关系。“以下至少一项(个)”或其类似表达，是指这些项中的任意组合，包括单项(个)或复数项(个)的任意组合。例如，a，b或c中的至少一项(个)，可以表示：a，b，c，“a和b”，“a和c”，“b和c”，或“a和b和c”，其中a，b，c可以是单个，也可以是多个。It should be understood that in this application, "at least one (item)" means one or more, and "multiple" means two or more. "And/or" is used to describe the association relationship of associated objects, indicating that there can be three types of relationships, for example, "A and/or B" can mean: only A exists, only B exists, and A and B exist at the same time , where A and B can be singular or plural. The character "/" generally indicates that the contextual objects are an "or" relationship. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one item (piece) of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c ", where a, b, c can be single or multiple.

以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案的精神和范围。As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it can still understand the foregoing The technical solutions described in each embodiment are modified, or some of the technical features are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the application.

Claims (10)

1. A data management method for long-distance transmission of USB signals, the data management system being applied to long-distance transmission of USB signals, the data management system comprising: the remote host is connected with the local host, and is provided with remote equipment;
the management method comprises the following steps:
step S1, the data management device sends an IN packet sent by the local host based on a USB signal to a remote host;
step S2, when the remote host checks that the CRC of the IN packet is qualified, judging whether the IN packet is synchronous transmission, if so, executing step S3, and if not, executing step S4;
step S3, the far-end host sends the IN packet to the far-end equipment, and sends response data returned by the far-end equipment to the data management device, so that the data management device forwards the response data to the local host;
and S4, the remote host sends the IN packet to the remote equipment, judges whether CRC of response data returned by the remote equipment is qualified, if so, sends the response data to the local host through the data management device, and otherwise, sends NAK to the local host through the data management device.
2. The method for data management in remote transmission of USB signals according to claim 1, wherein step S1 is preceded by the further steps of:
and S0, the data management device receives the IN packet of the local host, judges whether the IN packet is synchronous transmission or not, if yes, judges whether the CRC of the IN packet is qualified, and if yes, returns NAK to the local host and then executes the subsequent steps.
3. The method according to claim 1, wherein the step S3 of sending the reply data returned by the remote device to the data management device, so that the data management device forwards the reply data to the local host, specifically includes:
the remote host sends response data returned by the remote device to the data management device;
and when the data management device receives the IN packet sent by the local host again, returning the response data to the local host.
4. The method according to claim 1, wherein the step S4 of sending NAK to the local host by the data management device, further comprises:
the remote host resends the IN packet to the remote device;
and when the acquired data returned by the remote device is NAK or STALL, sending the NAK or STALL to the local host through the data management device.
5. The method according to claim 1, wherein the step S4 of transmitting the response data to the local host through the data management device, further comprises:
the remote host sends an ACK to the remote device.
6. The method for data management in remote transmission of USB signals according to claim 1, further comprising:
step S6, when the DATA management device judges that the OUT packet and the DATA packet sent by the local host based on the USB signal are not synchronously transmitted, judging whether CRC corresponding to the OUT packet and the DATA packet is qualified or not, if yes, sending the OUT packet and the DATA packet to the remote host;
step S7, the remote host judges whether CRC corresponding to the OUT packet and the DATA packet is qualified or not, if not, the DATA management device sends DATA errors to the local host, and if yes, the OUT packet and the DATA packet are sent to the remote device;
and S8, when judging that the OUT packet and the DATA packet are not synchronously transmitted, the remote host sends response DATA returned by the remote device to the local host through the DATA management device.
7. The method for data management in remote transmission of USB signals according to claim 6, further comprising:
and S5, when the DATA management device judges that the OUT packet and the DATA packet sent by the local host based on the USB signal are synchronously transmitted, no information is returned to the local host.
8. The method of claim 6, wherein in step S6, it is determined whether the CRCs corresponding to the OUT packet and the DATA packet are acceptable, and if yes, the OUT packet and the DATA packet are sent to the remote host, and the method specifically includes:
judging whether CRC corresponding to the OUT packet and the DATA packet is qualified or not;
if yes, the OUT packet and the DATA packet are sent to the remote host;
if not, the OUT packet and the DATA packet are not forwarded to the remote host, and no information is returned to the local host.
9. The method for data management in remote transmission of USB signals according to claim 1, further comprising:
step S9, when the DATA management device acquires a SETUP packet and a DATA packet which are sent by the local host based on a USB signal, judging whether CRC of the SETUP packet and the DATA packet is qualified, if yes, sending the SETUP packet and the DATA packet to the remote host;
step S10, the remote host determines whether the CRC of the SETUP packet and the DATA packet is acceptable, if yes, the SETUP packet and the DATA packet are sent to the remote device, and the ACK sent by the remote device is sent to the local host through the DATA management device.
10. The method for data management in remote transmission of USB signals according to claim 9, wherein step S10 specifically includes:
the remote host judges whether the CRC of the SETUP packet and the DATA packet is qualified or not;
if yes, the SETUP packet and the DATA packet are sent to the remote equipment, and ACK sent by the remote equipment is sent to the local host through the DATA management device;
if not, sending a data reacquiring instruction to the local host through the data management device.
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