The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2009
Filed:
Feb. 26, 2004
Nattavut Smavatkul, Elk Grove Village, IL (US);
YE Chen, Schaumburg, IL (US);
Stephen P. Emeott, Rolling Meadows, IL (US);
Floyd D. Simpson, Lake Worth, FL (US);
Huai Y. Wang, Greenacres, FL (US);
Nattavut Smavatkul, Elk Grove Village, IL (US);
Ye Chen, Schaumburg, IL (US);
Stephen P. Emeott, Rolling Meadows, IL (US);
Floyd D. Simpson, Lake Worth, FL (US);
Huai Y. Wang, Greenacres, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A mobile terminal () wakes up from a low power state and initiates a frame exchange in a wireless local area network that supports voice traffic by transmitting a polling frame (). If the mobile terminal had voice data to send, it is included in the polling frame. In response to receiving the polling frame, the access point transmits a delay frame () to acknowledge receipt of the polling frame. If the access point has data for the polling mobile terminal, it transmits a non-delay frame () including the voice data, otherwise it transmits a null frame (). The mobile terminal acknowledges the data from the access point (), and goes back to sleep until the beginning of the next service interval.