Patent ID: 7085226

Claim:
An apparatus for relay node duplexing, comprising: a duplexing control unit which maintains a message transmission function and disables a message receiving function of an active node and initiates a message receiving function of a standby node during a duplex exchange operation performed in response to a failure condition, and which transfers an active right signal to the standby node when the duplex exchange operation is completed, wherein the duplexing control unit comprises: an active signal generation unit for generating the active right signal; an exchange reporting unit for informing the standby node to prepare for a duplex exchange, when duplex exchange is requested, and controlling the active node not to receive a message any more; an exchange complete detection unit for detecting a message storing state of a TX buffer and an RX buffer of the active node when preparation for the duplex exchange is reported, and controlling completion of the exchange according to a result of the detection; an exchange determination unit for determining the completion of the exchange according to the control of the exchange completion of the exchange complete detection unit and outputting a result of the determination to the active signal generation unit; an exchange preparation unit for preparing for the exchange by controlling the message receiving of the standby node when the exchange preparation is reported from the active node; and an operation control unit for controlling the operation of the message receiving of the standby node according to the control of the exchange reporting unit and exchange preparation unit.