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:
Apr. 09, 2002
Filed:
Jun. 22, 2000
Sony International (Europe) GmbH, Berlin, DE;
Abstract
Performing an antenna diversity set-up according to the present invention a first mobile terminal ( ) transmits a pre-defined antenna calibration signal to a second mobile terminal ( ) using its omni-directional antenna ( ). During the period of the transmitted signal the best receiving antenna (x) is identified at the second mobile terminal ( ) by switching all its directional antennas ( to ) and its omni-directional antenna ( ) into its receiving path and measuring the received signal quality, e.g. the received signal strength. The directional antenna (x) of the second network device ( ) which is identified as best receiving antenna is then used for transmission and reception of data transfer with the first network device ( ). Using this antenna, the second network device ( ) transmits its pre-defined calibration signal to the first network device ( ) which repeats a similar switching and measuring procedure with its directional antennas ( to ) and its omni-directional antenna ( ) to identify its best receiving antenna (y). These two antennas (x, y) identified at the second network device ( ) and the first network device ( ) are then used for direct data transfer in-between these both devices. This inventive method is preferably used in direct mode within an IEEE 1394 based HIPERLAN type 2 wireless network.