A display apparatus comprising: a transceiver configured to communicate with an access point, AP, using a WiFi connection scheme and communicate with a portable apparatus using a wireless peer-to-peer, P2P, connection scheme; a memory; and a controller configured to: receive a request for connecting the wireless peer-to-peer, P2P, connection scheme with the portable apparatus, obtain first access point connection information on a first frequency band which the display apparatus is currently using for wireless communication with the access point, control the transceiver to receive, from the portable apparatus connectable in the wireless peer-to-peer, P2P, connection scheme, second access point connection information on a second frequency band which the portable apparatus is currently using for wireless communication with the access point or another access point, determine a frequency band of a peer-to-peer, P2P, operating channel which is used in connecting the display apparatus and the portable apparatus according to the wireless peer-to-peer, P2P, connection scheme, to one of the first frequency band and the second frequency band, and control the transceiver to establish a wireless peer-to-peer, P2P, connection with the portable apparatus based on the determined frequency band of P2P operating channel. a transceiver configured to communicate with an access point, AP, using a WiFi connection scheme and communicate with a portable apparatus using a wireless peer-to-peer, P2P, connection scheme; a memory; and a controller configured to: receive a request for connecting the wireless peer-to-peer, P2P, connection scheme with the portable apparatus, obtain first access point connection information on a first frequency band which the display apparatus is currently using for wireless communication with the access point, control the transceiver to receive, from the portable apparatus connectable in the wireless peer-to-peer, P2P, connection scheme, second access point connection information on a second frequency band which the portable apparatus is currently using for wireless communication with the access point or another access point, determine a frequency band of a peer-to-peer, P2P, operating channel which is used in connecting the display apparatus and the portable apparatus according to the wireless peer-to-peer, P2P, connection scheme, to one of the first frequency band and the second frequency band, and control the transceiver to establish a wireless peer-to-peer, P2P, connection with the portable apparatus based on the determined frequency band of P2P operating channel. receive a request for connecting the wireless peer-to-peer, P2P, connection scheme with the portable apparatus, obtain first access point connection information on a first frequency band which the display apparatus is currently using for wireless communication with the access point, control the transceiver to receive, from the portable apparatus connectable in the wireless peer-to-peer, P2P, connection scheme, second access point connection information on a second frequency band which the portable apparatus is currently using for wireless communication with the access point or another access point, determine a frequency band of a peer-to-peer, P2P, operating channel which is used in connecting the display apparatus and the portable apparatus according to the wireless peer-to-peer, P2P, connection scheme, to one of the first frequency band and the second frequency band, and control the transceiver to establish a wireless peer-to-peer, P2P, connection with the portable apparatus based on the determined frequency band of P2P operating channel.