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1. (WO2018040879) PASSWORD KEYBOARD USB COMMUNICATION ANOMALY RECOVERY METHOD AND SYSTEM

Pub. No.:    WO/2018/040879    International Application No.:    PCT/CN2017/096824
Publication Date: Fri Mar 09 00:59:59 CET 2018 International Filing Date: Fri Aug 11 01:59:59 CEST 2017
IPC: H04L 1/08
H04L 1/18
Applicants: FUJIAN LANDI COMMERCIAL EQUIPMENT CO., LTD
福建联迪商用设备有限公司
Inventors: LIN, Hui
林晖
WU, Minxing
吴闽星
Title: PASSWORD KEYBOARD USB COMMUNICATION ANOMALY RECOVERY METHOD AND SYSTEM
Abstract:
The present invention relates to the technical field of USB communications, and provides a password keyboard USB communication anomaly recovery method and system. The method comprises the following steps: various underlying drive modules of a password keyboard insert command numbers in respective communication data; determine whether communication is abnormal or not; if yes, the various underlying drive modules of the password keyboard determine whether data needs to be retransmitted; if yes, the underlying drive modules transmit original data again with the same command numbers; a connecting device determines whether the command numbers of the received data are same or not; if yes, discard repetitively received data, or otherwise, receive the data. According to the technical solution of the present invention, various underlying drive modules perform error processing; the short-time disconnection problem due to the fact that communication is interfered is resolved; design of a communication protocol can be simplified; and thus, by means of a command serial number mechanism, the problem of asynchronous or repetitive operation of both communication sides due to the fact that same commands are repetitively received and transmitted can be prevented.