公开(公告)号：EP1453331A2

公开(公告)日：2004-09-01

申请号：EP04003557.8

申请日：2004-02-17

申请人： NTT DoCoMo, Inc.

发明人： Umesh, Anil ,  Okawa, Koichi ,  Tanaka, Shinya ,  Nakamura, Takehiro

IPC分类号： H04Q7/30

CPC分类号： H04W72/0466 ,  H04W24/00 ,  H04W88/08

摘要： 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 (3) 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 (2) 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.

摘要翻译： 基站被配置为向位于由基站管理的扇区中的移动台发送下行链路信号。 使用扰码扩展下行链路信号。 基站具有：监视器，用于监视扇区中的移动站的上行链路公共信道的接收状态的变化; DOA估计器，被配置为估计从移动台发送的上行链路信号的到达方向，作为响应 通过根据所述估计的方向设置所述扇区中的区域边界，配置为将所述扇区分割成多个区域的区域边界设置器（3），被配置为分配不同的加扰 代码分配给每个分离区域，以及扩展器，被配置为使用分配的扰码在每个分离区域中扩展下行链路信号。

公开(公告)号：EP1416752A1

公开(公告)日：2004-05-06

申请号：EP03024934.6

申请日：2003-10-29

申请人： NTT DoCoMo, Inc.

发明人： Umesh, Anil ,  Tanaka, Shinya ,  Nakamura, Takehiro ,  Okawa, Koichi

IPC分类号： H04Q7/36 ,  H01Q3/24

CPC分类号： H01Q1/246 ,  H04W16/28

摘要： The object of the present invention is to avoid disconnection of a radio link between the radio base station and the mobile station even when the mobile station moves while transmitting no up signals in a case where the radio base station transmits the directional beam. The radio base station according to the present invention comprises an array antenna (11) to transmit/receive the directional beam, a transceiver (12) to receive an up signal from a mobile station (2) and to generate a directional beam pattern for each mobile station according to an antenna weight, an up signal interval measurer (13) to measure elapsed time from reception of the up signal, and an antenna weight generator (15) to change the antenna weight based on a result of measuring by the up signal interval measurer (13).

摘要翻译： 测量来自移动台的上行信号的接收经过的时间。 每个移动站的信号的权重因子根据测量结果被输入到自适应阵列天线（11），以改变天线权重。 基于天线权重产生每个移动台的定向波束图案。 无线电基站还包括独立的索赔。

公开(公告)号：EP1453331A3

公开(公告)日：2007-02-28

申请号：EP04003557.8

申请日：2004-02-17

申请人： NTT DoCoMo, Inc.

发明人： Umesh, Anil ,  Okawa, Koichi ,  Tanaka, Shinya ,  Nakamura, Takehiro

IPC分类号： H04Q7/30

CPC分类号： H04W72/0466 ,  H04W24/00 ,  H04W88/08

摘要： 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 (3) 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 (2) 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.

公开(公告)号：EP1416752B1

公开(公告)日：2007-01-10

申请号：EP03024934.6

申请日：2003-10-29

申请人： NTT DoCoMo, Inc.

发明人： Umesh, Anil ,  Tanaka, Shinya ,  Nakamura, Takehiro ,  Okawa, Koichi

IPC分类号： H04Q7/36 ,  H01Q3/24

CPC分类号： H01Q1/246 ,  H04W16/28