Patent ID: 7920465

Claim:
A method for transmitting control signal of Resilient Packet Ring (RPR) Medium Access Control (MAC), comprising: detecting, by a sending unit, a state of a control signal; deciding, by the sending unit, whether a toggle happens to the control signal; if the toggle happens, encapsulating, by a sending unit, the control signal of the RPR MAC into an RPR data frame of a predefined format, and adding, by the sending unit, a specific identifier into the RPR data frame, wherein the specific identifier is used to identify an existence of the control signal; adopting a high priority transmission channel to transmit the RPR data frame between the sending unit and a receiving unit, wherein said RPR data frame contains the control signal of the RPR MAC and the specific identifier; and upon receiving the RPR data frame, analyzing, by the receiving unit, said RPR data frame to obtain the control signal of the RPR MAC after determining that the RPR data frame contains the specific identifier.