Method for increasing two tier macrocell/microcell subscriber capacity in a cellular system
US5345499A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 23, 1992 |
| Grant date | Sep 6, 1994 |
| Priority date | — |
| Expiry date | Mar 23, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W36/04
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for enabling the service of mobilies by a microcell, in a two tier cellular system, involves identifying a microcell coverage area and offsetting microcell signal strength for a time sufficient to allow a fast moving vehicle, desiring service and having entered the microcell serving area, to exit the microcell coverage area before the call is set up or handed off forcing the controlling macrocell to handle the call setup or hand-off. Hence, only the mobile radiotelephones of stationary and relatively slow moving vehicles are served by the microcell. There is a substantially offset-coverage overlap period between the locations where a mobile may be found during the offset interval or duration of the apparent reduced signal strength of the microcell and the microcell coverage area. Calls that could be serviced by the microcell are instead serviced by the macrocell because the mobile radiotelephone responds to the strongest signal. This loss in capacity is solved by reducing the offset-coverage overlap. Offset-coverage overlap is reduced by starting the offset or timed duration of a delay enablement signal at some predetermined point before the mobile enters the microcell cov…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.