Sleep/wake-up scheduling the transceiver of sensor node have active state, sleep state and idle state. During its active state data is transferred to sink node. If the transceiver is in idle state it moves to sleep mode to save the lifetime of wireless sensor network. The energy of transceiver must be saved so it is moved to active mode at the required time. Remaining time it is moved to sleep mode. Each frame consists of sleep and wake-up mode by using the sleep/wake up protocol.