Method for transmitting packet in wireless personal area network

In order to avoid the present invention is due to that, traffic concentration in the presence of a packet to the MAC layer at the time that the network device switch to enable eye after an inactivity period in the packet forwarding method in a short range wireless network congestion adaptively according to the duty cycle a dividing process and the activation period for setting the initial back-off value using multiple slot includes the step of the back-off time of the packets to begin at the beginning of random slots. According to the invention, in accordance with the duty cycle to be able to control the initial back-off value is adaptively it is possible to maximize transmission efficiency and energy savings. Wireless local area network (WPAN; Wireless Personal Area Network), the back off (backoff), decreased function, and the duty cycle (duty cycle), the slot (slot)