Mobile communications in a hierarchical cell structure
US7142861B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 2003 |
| Grant date | Nov 28, 2006 |
| Priority date | — |
| Expiry date | Sep 21, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J11/0059
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A hierarchical cell structure (HCS) cellular communications system includes a macro cell encompassing a smaller micro cell that employ the same frequency band. The macro cell includes a macro cell base station, and the micro cell includes a micro cell base station. An uplink communication cell boundary between the macro cell and the micro cell is established, and a downlink communication cell boundary between the macro cell and the micro cell is established. A radio network controller determines whether a condition exists in the HCS system which indicates that the uplink and downlink micro cell boundaries should be unbalanced. If the condition is met or exists, the power and/or antenna beam tilt of a downlink transmission from the micro cell base station is reduced to unbalance the uplink and downlink micro cell boundaries. Alternatively, the radio network controller may employ an offset value to mathematically reduce mobile detected pilot power levels associated with the micro base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.