Handover techniques
US5278991A · kind A · utility
47Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 1991 |
| Grant date | Jan 11, 1994 |
| Priority date | — |
| Expiry date | Feb 14, 2011 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a cellular radio system having a two layer cell structure comprised by macrocells (1) overlaying microcells (2), handover occurs only via the macrocell layer. Thus when the quality of a call handled by a microcell (2) deteriorates below predetermined criteria the call is handed up rapidly to the umbrella macrocell and is only handed back down to a microcell when the handset has been in that microcell for a predetermined time and the quality of the link thereto exceeds predefined criteria.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.