A method of operating a device as an Access Point, AP, the method comprising: broadcasting a packet including communication connecting information with regard to a second communication method using a first communication method; establishing a first communication link using the first communication method after receiving a first connection request with regard to the first communication method from another device receiving the packet; establishing a second communication link using the second communication method after receiving a second connection request with regard to the second communication method from the other device,; and operating the device as the AP by using the second communication link (S240; S610); characterized in that the method further comprises: receiving a third request with regard to an operation of the device as the AP from the other device via the first communication link ( S625, S655); receiving, from the other device, setting information on a transmission of a push message; and when an operation mode of a communication module of the device supporting the second communication method is set as a sleep mode, determining whether to transmit the push message via the second communication link which will be re-established to the other device based on the setting information wherein the sleep mode corresponds to a state where the connection of the second communication link is terminated. broadcasting a packet including communication connecting information with regard to a second communication method using a first communication method; establishing a first communication link using the first communication method after receiving a first connection request with regard to the first communication method from another device receiving the packet; establishing a second communication link using the second communication method after receiving a second connection request with regard to the second communication method from the other device,; and operating the device as the AP by using the second communication link (S240; S610); characterized in that the method further comprises: receiving a third request with regard to an operation of the device as the AP from the other device via the first communication link ( S625, S655); receiving, from the other device, setting information on a transmission of a push message; and when an operation mode of a communication module of the device supporting the second communication method is set as a sleep mode, determining whether to transmit the push message via the second communication link which will be re-established to the other device based on the setting information wherein the sleep mode corresponds to a state where the connection of the second communication link is terminated. receiving a third request with regard to an operation of the device as the AP from the other device via the first communication link ( S625, S655); receiving, from the other device, setting information on a transmission of a push message; and when an operation mode of a communication module of the device supporting the second communication method is set as a sleep mode, determining whether to transmit the push message via the second communication link which will be re-established to the other device based on the setting information wherein the sleep mode corresponds to a state where the connection of the second communication link is terminated.