Back to results
US 7,120,467 B2Granted
Radio communication method and base station
AssigneeNtt Docomo, Inc.
InventorsAnil Umesh, Koichi Okawa, Shinya Tanaka, Takehiro Nakamura
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNtt Docomo, Inc.
InventorsAnil Umesh, Koichi Okawa, Shinya Tanaka, Takehiro Nakamura
Estimating the term…
A base station is configured to transmit a downlink signal to a mobile station located in a sector managed by the base station. The downlink signal is spread using a scrambling code. The base station has a monitor configured to monitor a change of a reception condition of an uplink common channel of the mobile station in the sector, a DOA estimator configured to estimate a direction of arrival of an uplink signal transmitted from the mobile station, in response to the change, an area border setter configured to separate the sector into a plurality of areas, by setting an area border in the sector in accordance with the estimated direction, a scrambling code assigner configured to assign a different scrambling code to each of the separated areas and a spreader configured to spread the downlink signal using the assigned scrambling code in each of the separated areas.
A base station for transmitting a downlink signal to a mobile station located in a sector managed by the base station, the downlink signal being spread using a scrambling code and a channelization code, the base station comprising:
A radio communication method for transmitting a downlink signal to a mobile station located in a sector managed by a base station, the downlink signal being spread using a scrambling code and a channelization code, the method comprising the steps of:
Dependencies are inferred from the claim text.