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:
Jul. 24, 2012
Filed:
Jan. 04, 2010
Raymond Yim, Cambridge, MA (US);
Zhifeng Tao, Arlington, MA (US);
Zafer Sahinoglu, Arlington, MA (US);
Man-on Pun, Cambridge, MA (US);
Raymond Yim, Cambridge, MA (US);
Zhifeng Tao, Arlington, MA (US);
Zafer Sahinoglu, Arlington, MA (US);
Man-On Pun, Cambridge, MA (US);
Mitsubishi Electric Research Labortories, Inc., Cambridge, MA (US);
Abstract
A wireless network master node periodically broadcasts beacons that specify a structure of a following fixed length superframe. Slave nodes determine a channel condition between each slave and the master. Then, the set of slaves is partitioned into subsets of slaves according to the channel conditions. The master assigns, to each slave, a transmission rate in a low to high order according to the channel conditions, and the slaves transmit data to the master in the low to high order between two consecutive beacons, wherein the subsets of slaves with a higher transmission rate also receive the data from the subsets of slaves with a lower transmission rate, and wherein a slave with a higher transmission rate includes a part of or all the data from a slave with a lower transmission rate.