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. 09, 2013
Filed:
Jun. 26, 2009
Ari Hottinen, Espoo, FI;
Mikko A. Uusitalo, Helsinki, FI;
Ari Hottinen, Espoo, FI;
Mikko A. Uusitalo, Helsinki, FI;
Nokia Corporation, Espoo, FI;
Abstract
A method includes transmitting, from a radio device of a secondary communication system, a signal into a channel of a primary communication system; monitoring channel signal quality-related feedback of the primary system; determining, based on the monitored channel signal quality-related feedback, an amount of mutual coupling between the transmitted signal and the channel, if any, caused by the transmitted signal; and if the amount of determined mutual coupling is less than a threshold amount, using the channel for communication with another radio device of the secondary communication system. The signal that is transmitted may be a probing signal having at least a predetermined temporally varying transmission pattern, and where determining includes correlating at least the predetermined temporally varying transmission pattern with changes, if any, in the monitored channel signal quality-related feedback. The channel signal quality-related feedback that is monitored may include at least one of ACK/NACK feedback, power control feedback, rate control feedback and channel quality indicator feedback.