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:
Jun. 09, 2009
Filed:
Oct. 06, 2005
Marceau Coupechoux, Paris, FR;
Lionel Fiat, Garches, FR;
Marceau Coupechoux, Paris, FR;
Lionel Fiat, Garches, FR;
Alcatel, Paris, FR;
Abstract
A method of handover between two WLAN cells based on the IEEE 802.11 standard and working at two different frequencies, the method including the step of performing measurement(s) on the second frequency in order to verify the necessity or the opportunity to realise a handover, the first frequency being currently used to transmit data, the method characterised in that it involves: first sending at least one dummy data or control frame on the first frequency which is currently used for transmitting data, the data or control frame including a duration data with a value at least equal to the time needed to perform the measurement(s) at the second frequency, and, then performing the measurement(s) on the second frequency.