Method and device for performing audio/video streaming in wireless communication system

Patent metadata

Field	Value
Publication number	US-2016205148-A1
Application number	US-201414916072-A
Country	US
Kind code	A1
Filing date	Sep 4, 2014
Priority date	Sep 5, 2013
Publication date	Jul 14, 2016
Grant date	—

Abstract

A method for performing Audio/Video (A/V) streaming between at least one source device and at least one sink device in a wireless communication system, the method performed by a source device comprising: receiving from a sink device an A/V source discovery message for discovering information related to A/V channels that the source device supports; transmitting a response with respect to the A/V source discovery message to the sink device; receiving from the sink device information related to A/V channels selected by the sink device for A/V streaming; performing an A/V stream connection procedure for A/V streaming with the sink device; and transmitting an A/V stream to the sink device by using information related to A/V channels selected by the sink device.

First claim

1 . A method for performing Audio/Video (A/V) streaming between at least one source device and at least one sink device in a wireless communication system, the method performed by a source device comprising:
performing a device discovery with a sink device; receiving from the sink device an A/V source discovery message for discovering information related to A/V channels that the source device supports; transmitting a response with respect to the A/V source discovery message to the sink device, wherein the response includes the information related to A/V channels that the source device supports; receiving from the sink device information related to A/V channels selected by the sink device for A/V streaming; performing an A/V stream connection for A/V streaming with the sink device; and transmitting an A/V stream to the sink device by using information related to A/V channels selected by the sink device, wherein the A/V channel related information includes at least one from among at least one group identification information and at least one stream identification information within each group.

2 . The method of claim 1 , wherein the A/V channel related information is an identifier (ID) representing at least one of A/V channel and A/V stream.

3 . The method of claim 2 , wherein the response further comprises a list of available A/V channels.

4 . The method of claim 1 , wherein the A/V channel related information further comprises a Number of Group ID (NumGID) field representing the total number of groups that the source device supports and a Number of Stream ID (NumSID) field representing the total number of streams that each group provides.

5 . The method of claim 1 , further comprising:
receiving remote control including A/V channel related information related to control of A/V streaming from the sink device; performing control of an A/V stream transmitted to the sink device according to the received remote control; and transmitting a control result of the A/V stream to the sink device.

6 . The method of claim 5 , wherein the control of the A/V stream is movement to the next A/V stream or to the previous A/V stream.

7 . The method of claim 1 , wherein reception of the A/V source discovery message and transmission of the response are performed through NFC tagging with the sink device.

8 . The method of claim 5 , wherein the A/V channel related information is a Stream End Point Identifier (SEID).

9 . The method of claim 8 , further comprising performing a Stream End Point (SEP) discovery procedure for performing remote control on the sink device, wherein the SEP discovery procedure comprises
receiving from the sink device an SEP discovery message for discovering an SEP that the source device supports; and transmitting to the sink device a response with respect to the SEP discovery message, wherein the response includes an SEID list of the source device.

10 . The method of claim 9 , wherein the remote control is an A/V command message or an A/V command header.

11 . The method of claim 10 , wherein the A/V command message further comprises at least one of information indicating selection of an SEP and information indicating change of the SEP.

12 . A method for performing Audio/Video (A/V) streaming between at least one source device and at least one sink device in a wireless communication system, the method performed by a sink device comprising:
performing a device discovery with a source device; transmitting to the source device an A/V source discovery message for discovering information related to A/V channels that the source device supports; transmitting to the selected source device an audio source discovery message to discover an audio source that the selected source device supports; receiving a response with respect to the A/V source discovery from the source device, wherein the response includes information related to A/V channels that the source device supports; selecting A/V channel related information for A/V streaming on the basis of the received response; transmitting the selected A/V channel related information to the source device; and receiving an A/V stream from the source device by using the selected A/V channel related information, wherein the A/V channel related information includes at least one from among at least one group identification information and at least one stream identification information within each group.

13 . The method of claim 12 , wherein the A/V channel related information is a Stream End Point Identifier (SEID).

14 . The method of claim 12 , wherein reception of the A/V source discovery message and transmission of the response are performed through NFC tagging with the sink device.

15 . The method of claim 13 , wherein the source device is a first source device and performs a method comprising
pairing NFC tagging with the second source device; receiving SEID of the second source device through pairing; transmitting to the first source device a request for the second device to join A/V streaming; receiving a result with respect to the request from the first source device; and receiving an A/V stream from the second source device on the basis of SEID of the second source device received through the pairing if the received result indicates that the second source device is allowed to join A/V streaming.

16 . The method of claim 14 , further comprising stopping A/V streaming to the sink device.

17 . The method of claim 14 , wherein the SEID of the second source device is included in the Out-Of-Band (OOB) data of Bluetooth.

18 . The method of claim 12 , wherein the OOB data further comprises Media Player ID (MPID).

19 . The method of claim 13 , wherein the source device is a first source device and performs a method further comprising
receiving an A/V stream from the first source device through Wi-Fi Direct communication; performing a device discovery procedure through Wi-Fi Direct communication with a second source device; receiving SEID of the second source device through the device discovery procedure and forming a Wi-Fi Direct Network (WFDN) group with the second source device; and receiving an A/V stream from the second source device.

20 . In a method for performing Audio/Video (A/V) streaming between at least one source device and at least one sink device in a wireless communication system, the source device comprising:
a communication unit for transmitting and receiving a signal with the outside in a wired and/or wireless manner; and a controller connected functionally to the communication unit, wherein the controller is configured to perform a device discovery procedure with a sink device; to receive from the sink device an A/V source discovery message for discovering information related to A/V channels that the source device supports; to transmit a response with respect to the A/V source discovery message to the sink device, where the response includes the information related to A/V channels that the source device supports; to receive from the sink device information related to A/V channels selected by the sink device for A/V streaming; to perform an A/V stream connection procedure for A/V streaming with the sink device; and to transmit an A/V stream to the sink device by using information related to A/V channels selected by the sink device, wherein the A/V channel related information includes at least one from among at least one group identification information and at least one stream identificatio

Assignees

• Lg Electronics Inc

Inventors

• Lee Jaeho
• Lee Minsoo
• Park Jangwoong
• Kim Soyoung
• Lee Hyeonjae
• Yang Seungryul
• Kim Jinpil

Classifications

• H04L65/1069 Primary

  Session establishment or de-establishment · CPC title

• H04N21/4112 Primary

  having fewer capabilities than the client, e.g. thin client having less processing power or no tuning capabilities · CPC title

• H04L65/4076

  Electricity · mapped topic

• H04L67/16

  Electricity · mapped topic

• H04L65/612

  for unicast · CPC title