Securing a connection in a radio system

Details Securing a connection in a radio system Securing a connection in a radio system

2003-05-30

2009-06-16

Tran, CongVan (Department: 2617)

Multiplex communications

Communication over free space

Having a plurality of contiguous regions served by...

C370S342000, C455S410000, C455S411000

Reexamination Certificate

active

07548527

ABSTRACT:
The invention relates to a method and a WCDMA radio system implementing the method wherein a connection between terminal devices and a base transceiver station is ensured by changing the transmission mode of a signal from a beamforming mode to a single antenna mode in a situation wherein calibration of an antenna array of the base transceiver station resides below a threshold value describing the quality of the calibration. The method comprises determining, at the base transceiver station, a calibration quality indicator describing the quality of calibration of the antenna array; checking whether the determined calibration quality indicator resides below a calibration quality threshold value, the calibration quality threshold value being a predetermined value; and switching over to using an antenna element specific transmission when the calibration quality indicator resides below the calibration quality threshold value.

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