Patent ID: 8811275

Claim:
A method of exchanging messages in a sink device to switch source devices in a wireless network; the method comprising: receiving, by the sink device, audio/video (A/V) data from a first source device; transmitting a first command from the sink device to a second source device within the wireless network to identify whether the second source device can transmit A/V data or not, wherein the first command is transmitted to the second source device by being encapsulated in an uplink control physical layer data unit (ULCPDU); receiving, by the sink device, a second command transmitted from the second source device in response to the first command, the second command including indication information indicating whether the second source device can transmit A/V data; and determining, by the sink device, whether to switch A/V data from the first source device to the second source device depending on the indication information included in the second command.