Downlink coordinated transmission in OFDMA systems, including WiMax systems
US7764658B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2007 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | May 30, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/541
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Embodiments described herein include methods for improving the SINR, and therefore communication quality or rate, in the downlink of a cellular communication system. In an embodiment, the system is an orthogonal-frequency-division multiple-access (OFDMA) system. In an embodiment, a set of terminals is designated a coordinated-transmission group. The set of terminal is chosen such that the slot-allocations of the set are given special treatment to alleviate interference from other sectors or cells. In an embodiment, “zones” defined in the WiMax standard are “repurposed” to handle the coordinated-transmission, although the zone was originally intended for another purpose.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.