TDMA-TDD/FDD radio communication system and channel selection method and apparatus for such a system
US6839333B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 1999 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Jan 22, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W88/085
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A TDMA radio communication system combines time and frequency division duplex. It includes a first base station transmitting in first downlink frames on a first carrier frequency in a first frequency band and receiving in first uplink frames, which have no time overlap with the first downlink frames, on a second carrier frequency in a second frequency band, which has no frequency overlap with the first frequency band. The system also includes a second base station, which has partially overlapping radio coverage area with the first base station, but is geographically separated from the first base station in order to avoid transmission from one base station disturbing reception from radio terminals on the other base station. The second base station transmits in second downlink frames on the first carrier frequency and receives in second uplink frames, which have no time overlap with the second downlink frames, on the second carrier frequency. The first and second downlink frames are offset to have no time overlap. A network controller synchronizes transmission from the first and second base stations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.