METHOD AND APPARATUS FOR CHANGING OPERATING MODE IN WIRELESS LAN SYSTEM

    公开(公告)号:US20190124719A1

    公开(公告)日:2019-04-25

    申请号:US16091089

    申请日:2017-04-04

    Abstract: The present specification proposes a signal processing method for changing an operating mode for transmitting a PPDU in a wireless LAN system. Specifically, a first station receives, from the second station, indication information which indicates a change in an operating mode indicating a receiving channel bandwidth and a number of spatial streams supported by a second station during a TXOP interval. When the number of spatial streams and the receiving channel bandwidth decrease, the first station configures a PPDU for the second station by using the indication information after transmitting an ACK for the indication information. When the number of spatial streams and the receiving channel bandwidth increase, the first station configures a PPDU for the second station by using the indication information during a subsequent TXOP interval of the TXOP interval.

    METHOD AND APPARATUS FOR OUTPUTTING SUPPLEMENTARY CONTENT FROM WFD

    公开(公告)号:US20170374412A1

    公开(公告)日:2017-12-28

    申请号:US15534914

    申请日:2015-12-09

    Abstract: A method and apparatus for outputting a supplementary content from a WFD is disclosed. The method for outputting a supplementary content from a WFD may comprise the steps of: after a WFD source is connected to a WFD, transmitting, by the WFD source, an RTSP parameter request message on the basis of an RTSP to a WFD sink in order to perform a capability negotiation procedure with the WFD sink; transmitting, by the WFD source, an RTSP parameter response message to the WFD sink in response to the RTSP parameter request message; and after performing the capability negotiation procedure, transmitting, by the WFD source, a transmission stream, obtained by overlapping and multiplexing a video stream including video data having a first resolution and a supplementary stream including supplementary data having a second resolution, to the WFD sink, wherein a WFD discovery response frame includes second resolution-related information for determining the second resolution, and an RTSP parameter response frame includes the second resolution-related information.

    METHOD AND APPARATUS FOR CHANGING OPERATING MODE IN WIRELESS LOCAL AREA NETWORK SYSTEM

    公开(公告)号:US20170367096A1

    公开(公告)日:2017-12-21

    申请号:US15587267

    申请日:2017-05-04

    Abstract: The present specification proposes a signal processing method for changing an operating mode for configuring a physical-layer protocol data unit (PPDU). Specifically, a first station receives, from a second station, first indication information and second indication information, which indicate a change of an operating mode indicating a number of spatial streams and a channel bandwidth which are supported by the second station. The first station configures a PPDU for the second station using last received indication information of the first indication information and the second indication information. Here, the first indication information is received through an operating mode indication (OMI) field, the second indication information is received through an operating mode notification (OMN) field, and the OMI field and the OMN field are not received through the same PPDU.

    METHOD FOR TRANSMITTING FRAME IN WIRELESS LOCAL AREA NETWORK AND WIRELESS DEVICE USING THE SAME

    公开(公告)号:US20170290060A1

    公开(公告)日:2017-10-05

    申请号:US15470667

    申请日:2017-03-27

    CPC classification number: H04W74/0816 H04W72/0453 H04W74/006 H04W84/12

    Abstract: According to an embodiment of the present specification, a method of transmitting a frame in a wireless local area network (WLAN) includes: receiving, by a user station (STA), a multi user-request to send (MU-RTS) frame from an access point (AP) to protect transmission for multi-users, wherein the MU-RTS frame includes common information commonly allocated to the multi-users, user-specific information individually allocated to the multi-users, and a control indicator indicating a first operation mode using a first channel and a second channel contiguous to the first channel and a second operation mode using the first channel and a third channel non-contiguous to the first channel; and transmitting, by the user STA, a clear to send (CTS) frame to the AP according to the control indicator in response to the MU-RTS frame.

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