Abstract: Provided is a method and apparatus for selective energy transmission in a wireless network. The method for selective energy transmission performed by a terminal in a wireless network includes selecting a transmission request frame for requesting data transmission or a transmission request frame for requesting data transmission and energy reception based on a remaining energy of the terminal; performing a channel contention based on a contention window; receiving a transmission acknowledgement frame by transmitting the selected transmission request frame to a hybrid access point; and transmitting data to the hybrid access point or receiving energy from the hybrid access point according to the transmitted transmission request frame.

Abstract: Provided are a method and apparatus for accessing a channel in a wireless powered communication network. A channel access method in a wireless powered communication network includes performing a random backoff contention using a predetermined initial contention window value in order to access a channel in a wireless powered communication network, transmitting, to a relay hybrid access point, a request to send (RTS) packet to request data transmission or energy reception based on remaining energy when the random backoff contention is successful, and increasing the initial contention window value by a predetermined multiple when a collision occurs in the transmission of the transmitted RTS packet, and performs a random backoff contention again.

Abstract: Provided is a method and apparatus for selective energy transmission in a wireless network. The method for selective energy transmission performed by a terminal in a wireless network includes selecting a transmission request frame for requesting data transmission or a transmission request frame for requesting data transmission and energy reception based on a remaining energy of the terminal; performing a channel contention based on a contention window; receiving a transmission acknowledgement frame by transmitting the selected transmission request frame to a hybrid access point; and transmitting data to the hybrid access point or receiving energy from the hybrid access point according to the transmitted transmission request frame.