Directivity control apparatus
AssigneeNEC Corporation
InventorMasashi Hirabe
Life of this patent
Estimating the term…
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.
Claims11
A directivity control apparatus comprising:
- reception means for receiving signals from a plurality of radio terminals;
- transmission means for transmitting signals to the radio terminals;
- direction determination means for determining directions of the radio terminals viewed from said transmission means on the basis of the signals received by said reception means;
- group selection means for distributing, by using a threshold, 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, and then selecting a group having a smaller total number of radio terminals;
- and
- directivity pattern control means for controlling a directivity pattern on the basis of the directions of the radio terminals determined by said direction determination means so as to increase intensity of radio waves to a target transmission radio terminal and decrease the intensity of radio waves to other radio terminals which transmit signals in the time-overlapping manner and belong to a group selected by said group selection means.
A directivity control apparatus comprising:
- reception means for receiving signals from a plurality of radio terminals;
- direction determination means for determining directions of the radio terminals viewed from said reception means on the basis of the signals received by said reception means;
- group selection means for distributing, by using a threshold, reception powers or uplink data transmission rates of radio terminals which receive signals in a time-overlapping manner, thereby classifying the radio terminals into two groups, and then selecting a group having a smaller total number of radio terminals;
- and
- directivity pattern control means for controlling a directivity pattern on the basis of the directions of the radio terminals determined by said direction determination means so as to increase intensity of radio waves to a target reception radio terminal and decrease the intensity of radio waves to other radio terminals which transmit signals in the time-overlapping manner and belong to a group selected by said group selection means.
Dependencies are inferred from the claim text.