公开(公告)号：US20130077613A1

公开(公告)日：2013-03-28

申请号：US13681897

申请日：2012-11-20

Applicant: INTERDIGITAL TECHNOLOGY CORPORATION

Inventor： Sudheer A. Grandhi ,  Mohammed Sammour ,  Joseph S. Levy

IPC: H04W74/00 ,  H04W84/12

CPC classification number: H04W72/1278 ,  H04W74/002 ,  H04W74/0833 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22

Abstract: A method and apparatus that applies medium access control (MAC) transmission opportunity (TXOP) protection for multiple mode operation in a WLAN system. In particular, MAC mechanisms are defined to support multiple mode CTS frames, and multiple mode CF-End frames sent by the AP, each in a format appropriate for the corresponding mode which may also apply to a single mode. MAC mechanisms permit truncation of TXOP duration for releasing the unused portion of the TXOP when no further data for transmission is available. Release of unused protected TXOP is possible for both protected AP transmissions and STA transmissions.