System and method of integrating dynamic frequency association with channel borrowing techniques
US6219554A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Sep 4, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A Dynamic Frequency Association ("DFA") techniques comprising fixed channel allocation ("FCA") and distributed channel borrowing techniques using a segregation scheme is described. The DFA technique can be used autonomously to dynamically determine the best channels for a cell cluster. Additionally, a method of minimizing search delays at channel assignment by employing a channel usage history is disclosed. In one aspect, as in FCA, each cell is assigned its nominal channels, if any, from the available frequency spectrum, with a fixed radio assigned to each of these frequencies, respectively. Additionally, in accordance with the teachings of the present invention, each cell is equipped with one or more radios designated as "DFA radios". In operation, idle DFA radios scan channels that may be borrowed in order to build a probability matrix. This enables the cell to determine which channels to use for traffic prior to actual channel request by a mobile. This reduces the search delay experienced in classic segregation schemes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.