Patent ID: 8692664

Claim:
An alarm report method for cascaded equipments, comprising: determining, by an RE, a source of link alarm information after the RE receives the link alarm information; selecting, by the RE, one link alarm information report mode from multiple predetermined link alarm information report modes according to a result of determining the source; and reporting, by the RE, the link alarm information to an REC according to the selected link alarm information report mode; wherein the multiple link alarm information report modes comprise: reporting, by the RE, the link alarm information to the REC through a data link layer transmission channel or data network layer transmission channel with a data checking function; or reporting, by the RE, the link alarm information to the REC through a physical layer channel between the RE and the REC; or reporting, by the RE, the link alarm information to the REC through a superior RE cascaded with the RE; and wherein the reporting, by the RE, the link alarm information to the REC through a superior RE cascaded with the RE comprises: sending, by the RE, the link alarm information to the master port of the superior RE cascaded with the RE; reporting, after receiving the link alarm information by the master port of the superior RE, the link alarm information to the REC through the data link layer transmission channel or data network layer transmission channel with a data checking function; and wherein the sending, by the RE, the link alarm information to the master port of the superior RE cascaded with the RE comprises: carrying, by the RE, the link alarm information in a control word defined by a CPRI and sending the control word to the master port of the superior RE cascaded with the RE; and receiving, by the master port of the superior RE, the link alarm information comprises: obtaining, after receiving the control word by the master port of the superior RE, the link alarm information from the control word by analyzing the control word.