Title:
無線端末装置、基地局、及び符号分割多重接続方式における逆方向共通チャネルのランダム接続方法
Document Type and Number:
Japanese Patent JP4955796
Kind Code:
B2
Abstract:
The invention relates to packet and random access in which multiple terminals (eg mobile phones) transmit data via a common code division multiple access (CDMA) Channel Terminals select one of available preamble signatures and one of available access slots and transmit a preamble (Fig.5). A base station tries to acquire the preamble and then broadcasts to all terminals whether the preambles are acquired or not (Fig.6). The terminals then transmit a data or retransmit a preamble according to the result of the preamble acquirement (Fig.5). The apparatus and method have improved network efficiency by reducing unnecessary data transmission and interference signal. An improved characteristic of time delay by ramping to adequate power level more quickly by re-transmitting preamble-by-preamble.
Inventors:
Kim Tae Jun
Ban Sung Chan
Sim geryon
Hanki Chul
Ban Sung Chan
Sim geryon
Hanki Chul
Application Number:
JP2010116285A
Publication Date:
June 20, 2012
Filing Date:
May 20, 2010
Export Citation:
Assignee:
Electronics and Telecommunications Research Institute
International Classes:
H04W74/08; H04B1/707; H04B7/005; H04B7/216; H04J13/00; H04W52/24; H04W52/32; H04W52/50; H04W76/02
Foreign References:
| WO1998049857A1 | ||||
| WO2000014989A1 | ||||
| WO2000021320A1 |
Attorney, Agent or Firm:
Yoshikazu Tani
Kazuo Abe
Kazuo Abe