Title:
データ伝送方法
Document Type and Number:
Japanese Patent JP5121392
Kind Code:
B2
Abstract:
The invention discloses a data transmission method, which includes the following steps of: (a) the obtaining signal-noise ratio/signal power by a base station from mobile terminals to the base station/relay station, and categorizes the mobile terminals under the conditions of different base stations/relay stations; (b) determining each frequency reuse factor's corresponding initial reuse mobile terminal group and the mobile terminals belonging to each initial reuse mobile terminal group; (c) adjusting the mobile terminals of the initial reuse mobile terminal group, and reusing the different mobile terminal group and reflecting the result to OFDM sub-carrier wave sign; (d) determining the weighting coefficient of pilot frequency and data in the adopted pre-coding method; (e) carrying out the pre-coding and cooperative transmission of joint data and pilot frequency at the base station and relay station to transmit the data to the target mobile terminal. The invention can avoid collisionof pilot frequencies, enhance the bit error ratio performance of mobile terminals, and effectively reuse resources repeatedly.
Inventors:
Lee An Xin
King Ming Akebono
Lee Xiangming
Hidetoshi Kayama
Fujio Watanabe
King Ming Akebono
Lee Xiangming
Hidetoshi Kayama
Fujio Watanabe
Application Number:
JP2007275554A
Publication Date:
January 16, 2013
Filing Date:
October 23, 2007
Export Citation:
Assignee:
NTT DoCoMo, Inc.
International Classes:
H04J11/00; H04W4/08; H04W72/04
Foreign References:
| WO2005020606A1 | ||||
| WO2006011471A1 | ||||
| WO2006014372A2 |
Attorney, Agent or Firm:
Hidekazu Miyoshi
Masakazu Ito
Shunichi Takahashi
Ichitaro Ito
Masakazu Ito
Shunichi Takahashi
Ichitaro Ito