Method of exchanging messages, sink device and source device
First Claim
1. 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.
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Accused Products
Abstract
A method of exchanging messages for switching of a sink device of a wireless network to a source device comprises receiving audio/video (A/V) data from a first source device; transmitting a first command to a second source device within the wireless network to identify whether the second source device can transmit A/V data; receiving a second command from the first source device, the second command being transmitted from the second source device in response to the first command and including indication information indicating whether the second source device can transmit A/V data; and determining whether to switch to the second source device depending on the indication information included in the second command.
41 Citations
19 Claims
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1. 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- the method comprising;
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12. A sink device receiving A/V data from a first source device in a wireless network, the sink device comprising:
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an audio video control (AVC) layer generating a first command including a first identifier for identifying the sink device, a second identifier for identifying a second source device, and an action code; a medium access control (MAC) layer generating a MAC message including a message preamble, a message type and the first command transferred from the AVC layer; and a physical layer generating a first physical layer data unit including an uplink control header, the MAC message and audio/video data and transferring the first physical layer data unit to the second source device, and receiving a second physical layer data unit from the first source device, the second physical layer data unit including a second command transmitted from the second source device in response to the first command and including indication information indicating whether the second source device can transmit A/V data, wherein the first physical layer data unit is an uplink control physical layer data unit (ULCPDU), wherein the sink device determines 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. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A sink device for use in a wireless network, the sink device comprising:
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a receiving module receiving a broadcasting signal from a first source device; a decoding module decoding the broadcasting signal received by the receiving module; a display module displaying contents according to the broadcasting signal decoded by the decoding module; a network control module generating a first physical layer data unit including a MAC message and transmitting the first physical layer data unit to a second source device, the MAC message including the broadcasting signal received by the receiving module and a first command for identifying whether the second source device can transmit A/V data, and receiving a second physical layer data unit including a second command from the first source device and processing the second physical layer data unit, the second command being transmitted from the second source device in response to the first command, wherein the first physical layer data unit is an uplink control physical layer data unit (ULCPDU); and a control module controlling the sink device to switch to the second source device through the second command processed by the network control module, store the broadcasting signal received by the receiving module in a local memory device, or play contents stored in the local memory device. - View Dependent Claims (19)
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Specification