Selection of an uplink carrier frequency corresponding to one of co-sited cells having different coverage areas and supporting different uplink data rates
US7881722B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2007 |
| Grant date | Feb 1, 2011 |
| Priority date | — |
| Expiry date | May 6, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W28/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Random access coverage is assured while at the same supporting high uplink data rates in a same service area served by a base station. The service area includes first and second co-sited cells. The first co-sited cell is associated with a first uplink frequency, and the second co-sited cell is associated with a second uplink frequency. The first cell allows a lower uplink load and provides a greater coverage than the second cell. The second cell allows a higher rise over thermal (RoT) value than the first cell. Random access channel requests are initially directed to the first cell using the first uplink frequency. One of the co-sited cells is selected for supporting the connection depending on one or more factors. Example factors include a priority associated with the mobile terminal, a capability associated with the mobile terminal, a load situation in the second cell, or radio channel conditions associated with the mobile radio terminal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.