Base station apparatus and radio communication method
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsKazuyuki Miya, Katsuhiko Hiramatsu, Hideyuki Takahashi
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Abstract
When switching to a path whose directivity changes greatly or a path with a widely different propagation delay, transmission is performed for both directivities for a certain period of time. Then, transmission is performed for one directivity. When the switching of transmission directivities is controlled, this allows correct reception of signals and prevents instantaneous interruption due to loss of synchronism even if transmission is performed by switching to a path with a widely different propagation delay.
Claims10
A base station apparatus, comprising:
- a reception quality detector that detects a first reception quality for a first path and a second reception quality for a second path, in association with signals received from a communication terminal apparatus via the first path and the second path, the first path and the second path having different arrival directions;
- a former that forms at least one of a first directivity and a second directivity respectively corresponding to the first path and the second path;
- a transmitter that transmits signals by switching a transmission directivity between the first directivity and the second directivity in accordance with the first reception quality and the second reception quality detected by the reception quality detector, and the second reception quality is smaller than a predetermined value, and subsequently changes the transmission directivity to the second directivity.
A wireless communication method comprising:
- detecting a first reception quality for a first path and a second reception quality for a second path, in association with signals received from a communication terminal apparatus via the first path and the second path, the first path and the second path having different arrival directions;
- forming at least one of a first directivity and a second directivity respectively corresponding to the first path and to the second path;
- transmitting signals by switching a transmission directivity between the first directivity and the second directivity in accordance with the first reception quality and the second reception quality,
- wherein, while the transmission directivity is being switched from the first directivity to the second directivity, signals are temporarily transmitted using both the first directivity and the second directivity, when a difference between the first reception quality and the second reception quality is smaller than a predetermined value, and subsequently the transmission directivity is changed to the second directivity.
Dependencies are inferred from the claim text.