Assigning cellular channels to locked and unlocked cells
US6456848B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 15, 1999 |
| Grant date | Sep 24, 2002 |
| Priority date | — |
| Expiry date | Dec 15, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W28/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Channels are assigned (56) to a subject cellular network (12) after taking into account the locked/unlocked status of cells (20). Channels are assigned to locked cells (20′) in accordance with a prearranged assignment plan (36). After this assignment, one unlocked cell (20″) is selected (50) at a time. An available channels list is built (54) for the selected unlocked cell (20″), and a channel is selected (56) from this list for assignment to the selected unlocked cell (20″). The available channels list is built (54) by evaluating all channels in the network (12) one at a time to determine if their assignment to the selected unlocked cell (20″) would cause undue interference in any other cell (20) of the network (12). If interference worse than a minimum system threshold is detected (82) in another cell (20), a channel is made unavailable for assignment unless it is a locked cell (20″). For a locked cell it is made unavailable (92) if the channel assignment would worsen interference by more than an offset value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.