Subcarrier group based power control for OFDMA systems
US8718081B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2012 |
| Grant date | May 6, 2014 |
| Priority date | — |
| Expiry date | Nov 26, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W72/51
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system and method of wireless communication power control is provided which allows for adjusting power levels without requiring high bandwidth for control. Embodiments allocate subcarriers into unequal power groups, each group having a consistent subcarrier power level. Using interference parameter information from a user, a subcarrier is assigned from a group having adequate power to maintain the user's required power level. In general, users with higher power requirements, such as those near cell boundaries, will be assigned subcarriers from a group having a higher power level. A cell may use a different allocation than a neighbor, so that subcarriers with the highest power level in one cell may not also have the highest power level in a neighboring cell. Such diversity may reduce inter-cell interference of the subcarriers near a cell boundary, since no two subcarriers are transmitted with highest power simultaneously by neighboring base stations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.