United States Patent 8,014,818
Grandhi , et al. September 6, 2011
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Methods and systems for providing efficient operation of multiple modes in a WLAN system
Abstract
A method and system applies 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 also applies to a single mode as a trivial case. 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.
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Inventors: Grandhi; Sudheer A. (Mamaroneck, NY), Sammour; Mohammed (Montreal, CA), Levy; Joseph S. (Merrick, NY)
Assignee: InterDigital Technology Corporation (Wilmington, DE)
Appl. No.: 11/618,328
Filed: December 29, 2006
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Related U.S. Patent Documents
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Application Number Filing Date Patent Number Issue Date
60756457 Jan., 2006
60796176 Apr., 2006
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Current U.S. Class: 455/552.1 ; 370/235; 370/328; 370/338; 370/468; 370/503; 455/450; 455/502; 455/556.2
Current International Class: H04M 1/00 (20060101)
Field of Search: 370/229,235,252,294,328-330,331,336-338,343,347-350,395.2-395.5,395.52,389,443-463,468,503,506 455/41.1,422.1,552.1,502,434,553.1,556.2,549,450,550.1,561,452.1-453
PPP
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