- Patent Title: Distributed radio communication base station system, base band unit, remote radio unit, and method for operating distributed radio communication base station system
-
Application No.: US14424342Application Date: 2013-10-10
-
Publication No.: US09866327B2Publication Date: 2018-01-09
- Inventor: Naotaka Shibata , Seiji Yoshida , Shigeru Kuwano , Jun-ichi Kani , Jun Terada
- Applicant: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Applicant Address: JP Tokyo
- Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Current Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
- Current Assignee Address: JP Tokyo
- Agency: Ohlandt, Greeley, Ruggiero & Perle, L.L.P.
- Priority: JP2012-231548 20121019; JP2012-242491 20121102; JP2012-247260 20121109
- International Application: PCT/JP2013/077611 WO 20131010
- International Announcement: WO2014/061552 WO 20140424
- Main IPC: H04B10/2575
- IPC: H04B10/2575 ; H04W88/08
Abstract:
Since a sampling frequency of RRU is always constant, A/D conversion may be performed with a sampling frequency higher than necessary with respect to a frequency band width of a radio signal.A sampling frequency change function, and the sampling frequency is reduced in a range where a aliasing component does not deteriorate signal quality of a desired signal component when the sampling frequency is decreased, based on radio band allocation information, or signal transmission between BBU and RRU is stopped in a no signal section, whereby a band required for digital RoF transmission between the BBU and the RRU is reduced.
Public/Granted literature
Information query
