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:
Jan. 07, 2014
Filed:
Aug. 19, 2010
Rapeepat Ratasuk, Hoffman Estates, IL (US);
Igor Filipovich, Chicago, IL (US);
Rangsan Leelahakriengkrai, Streamwood, IL (US);
Ivan N. Vukovic, Arlington Heights, IL (US);
Rapeepat Ratasuk, Hoffman Estates, IL (US);
Igor Filipovich, Chicago, IL (US);
Rangsan Leelahakriengkrai, Streamwood, IL (US);
Ivan N. Vukovic, Arlington Heights, IL (US);
Motorola Mobility LLC, Libertyville, IL (US);
Abstract
A wireless communication system as described here employs control signaling for contention-based uplink access from user equipment devices to a base station. Contention-based access configuration is performed via physical downlink control channel signaling. Configuration data sent to the user equipment devices identifies multiple contention-based access zones, along with minimum power headroom values for each contention-based access zone. A probability factor may also be used to lower collision possibility by influencing whether the user equipment devices perform contention-based uplink access. An uplink grant message can be used to acknowledge contention-based transmission; contention resolution is achieved implicitly via the uplink grant.