Patent ID: 8755285

Claim:
A method for diagnosing a physical downlink failure comprising: when a remote device detects the physical downlink failure, determining a code corresponding to information required to be reported based on a stored corresponding relationship between the information and the code; wherein the code is a predefined binary code that represents the information helping for failure diagnosing; the remote device generating a control signal from the determined code based on a predetermined low frequency clock; and the remote device reporting a signal corresponding to the control signal to a near-end device through a physical uplink such that the near-end device diagnoses the physical downlink failure according to the reported signal; wherein the near-end device diagnosing the physical downlink failure based on the reported signal includes: converting the reported signal into a received code based on the predetermined low frequency clock; determining information corresponding to the received code based on the stored corresponding relationship between the information and the code; and diagnosing the physical downlink failure based on the determined information.