Wireless base station apparatus and system to avoid preamble interference
US8139557B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 30, 2005 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Mar 5, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W92/20
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A radio base-station apparatus with improved frame transmission efficiency by avoiding interference of preambles and frame control information between sectors of a cell or between cells with a frequency reuse factor. In the apparatus OFDMA multiple-access processing is performed for each of a plurality of sectors of a cell, and frames made of logical subchannel numbers and OFDMA symbol numbers are configured in synchronization respectively for the plurality of sectors, and offsets are added to the beginnings of given frames such that the preambles and frame control information arranged sequentially from the beginnings of the frames do not overlap on the OFDMA symbol numbers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.