Title:
RADIO COMMUNICATION SYSTEM
Document Type and Number:
Japanese Patent JP3308835
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To increase subscriber capacity by making control channels in a cell common by a nondirectional antenna, and then making it hard to causing a softer hand-over in the same cell and eliminating capacity suppression accompanying the doubling of a line.
SOLUTION: An array antenna 17 has proper phase rotation and addition processing done by a beam generating means 1 and is made to correspond to a beam space. Its directional beam is coupled by a beam switching means 2 with a speaking channel transmission and reception means 3, and respective communication channels and transmission and reception directions are coupled with each other. The connection between the beam and channel is controlled by a base station control means 8. In addition to the antenna 17 which radiates or receives a control channel, a nondirectional antenna 11 is fitted for control channel radiation. A signal generated by a control information transmission and reception means 12 is sent from the nondirectional antenna 11, so nondirectional radiation of the control channel is actualized. Consequently, general transmission of control information can be performed while making good use of characteristics of the array antenna 17.
Inventors:
Mikio Kuwahara
Masayuki Hanaoka
Nobukazu Doi
Takamoto Garaku
Masayuki Hanaoka
Nobukazu Doi
Takamoto Garaku
Application Number:
JP32649496A
Publication Date:
July 29, 2002
Filing Date:
December 06, 1996
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H01Q1/24; H04B7/26; H01Q25/00; H04W16/28; (IPC1-7): H04B7/26
Domestic Patent References:
| JP787011A | ||||
| JP7170227A | ||||
| JP7202776A | ||||
| JP3220825A | ||||
| JP3178229A | ||||
| JP376439A | ||||
| JP6334575A |
Other References:
【文献】奥村善久、進士昌明監修、移動通信の基礎 電子情報通信学会第165頁
Attorney, Agent or Firm:
Yasuo Sakuta (1 outside)
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