Code allocation for radiocommunication systems
US6542484B1 · kind B1 · utility
26Cited by
16References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 15, 1998 |
| Grant date | Apr 1, 2003 |
| Priority date | — |
| Expiry date | May 15, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Multiple code sets are introduced in the downlink of a CDMA system to allow for more connections in each cell. The codes are then allocated to different users taking into account the interference therebetween. The interference depends on the antenna gains, transmission powers used and cross-correlations between codes. By estimating these parameters the interference can be minimized in the code allocation process. Since the allocation of codes and code sets to geographical areas within a cell may change over time, code handoff is supported.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.