Method of controlling data transmission mode in an orthogonal frequency division multiplexing wireless relay system and apparatus using the method
US7944809B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 24, 2007 |
| Grant date | May 17, 2011 |
| Priority date | — |
| Expiry date | Mar 14, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2001/0097
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method of controlling data transmission mode in an orthogonal frequency division multiple access (OFDMA) wireless relay system and an apparatus using the method are provided. The method of controlling data transmission mode includes: dividing all frequency bands of an OFDM signal into a frequency band group including at least one subcarrier band; estimating a plurality of channels of wireless links which respectively link a base station (BS), at least one relay station (RS), and a mobile station (MS) with respect to the at least one subcarrier band; selecting any one of a plurality of data transmission modes based on a feature of the estimated plurality of channels of wireless links with respect to the frequency band group; and applying the selected data transmission mode to all of the at least one subcarrier bands in the frequency band group to transmit data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.