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. 20, 2015
Filed:
Oct. 20, 2011
Narasimhan Venkatesh, Hyderabad, IN;
Narasimhan Venkatesh, Hyderabad, IN;
Redpine Signals, Inc., San Jose, CA (US);
Abstract
A station or access point has a list of associated stations including a BSSID. During an observation period, measurements of RSSI are made for each BSSID, including a maximum RSSI and a minimum RSSI. After the observation interval, an RSSI_threshold is computed which is below the weakest RSSI of a station which is on the list of associated stations, and also above the weakest RSSI of a station which is not on the list of associated stations. During packet reception, packet acquisition starts when the receiver signal level is detected to be above the RSSI_threshold. During packet transmission, a clear channel assessment (CCA), which ordinarily prevents transmission when signal energy is detected, is overridden if the measured RSSI is below the RSSI_threshold value, enabling earlier transmission of the packet than if the transmitter were to wait for CCA to be asserted.