Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
2006-04-11
2006-04-11
Le, Danh Cong (Department: 2683)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S561000, C455S273000, C370S334000, C370S249000, C343S757000, C342S372000, C342S373000
Reexamination Certificate
active
07027839
ABSTRACT:
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 antenna11to transmit/receive the directional beam, an transceiver12to receive an up signal from a mobile station2and to generate a directional beam pattern for each mobile station according to an antenna weight, a up signal interval measurer13to measure elapsed time from reception of the up signal, and a antenna weight generator15to change the antenna weight based on a result of measuring by the up signal interval measurer13.
REFERENCES:
patent: 6141335 (2000-10-01), Kuwahara et al.
patent: 6473036 (2002-10-01), Proctor, Jr.
patent: 6665545 (2003-12-01), Raleigh et al.
patent: 2003/0148770 (2003-08-01), Das et al.
patent: 2004/0014501 (2004-01-01), Kuwahara et al.
patent: 2004/0127260 (2004-07-01), Boros et al.
patent: 2004/0233871 (2004-11-01), Seki et al.
patent: 0 837 523 (1998-04-01), None
patent: 2000-332668 (2000-11-01), None
H. Taoka, et al., IEEE Wireless Communications, pp. 2-10, “Adaptive Antenna Array Transmit Diversity in FDD Forward Link for WCDMA and Broadband Packet Wireless Access”, Apr. 2002.
S. Tanaka, et al., Vehicular Technology Conference, vol. 4 of 4, Conf. 53, XP-001076169, pp. 2302-2306, “Optimum Transmit Antenna Weight Generation Method for Adaptive Antenna Array Transmit Diversity in W-CDMA Forward Link”, May 6, 2001.
M. Mizuno, et al., Electronics and Communications in Japan, Part I: Communications, vol. 77, No. 2, XP-000468597, pp. 48-58, “Application of Adaptive Array Antennas to Radio Communications”, Feb. 1, 1994.
Nakamura Takehiro
Okawa Koichi
Tanaka Shinya
Umesh Anil
Le Danh Cong
NTT DoCoMo Inc.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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