Directivity control apparatus

Details Directivity control apparatus Directivity control apparatus

2005-03-01

2005-03-01

Vo, Nguyen T. (Department: 2685)

Telecommunications

Transmitter and receiver at same station

Radiotelephone equipment detail

C455S522000

Reexamination Certificate

active

06862462

ABSTRACT:
A reception unit receives signals from a plurality of radio terminals. A transmission unit transmits signals to the radio terminals. A direction determination unit determines the directions of the radio terminals viewed from the transmission unit on the basis of the signals received by the reception unit. A group selection unit distributes, by using a threshold, the transmission powers or downlink data transmission rates of radio terminals which transmit signals in a time-overlapping manner, thereby classifying the radio terminals into two groups. Then, the group selection unit selects a group having a smaller total number of radio terminals. A directivity pattern control unit controls a directivity pattern on the basis of the directions of the radio terminals determined by the direction determination unit.

REFERENCES:
patent: 5887262 (1999-03-01), Willhoff
patent: 20020034967 (2002-03-01), Taniguchi et al.
patent: 9-200115 (1997-07-01), None
patent: 10-70502 (1998-03-01), None
patent: 11-298400 (1999-10-01), None
patent: A 2000-209017 (2000-07-01), None
patent: 2000-224097 (2000-08-01), None

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