Multi-mode/multi-rate fixed wireless communication system
US6349217B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1998 |
| Grant date | Feb 19, 2002 |
| Priority date | — |
| Expiry date | Apr 24, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W16/28
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A base station with a defined geographic coverage area in a wireless communication system includes a base receiver, a base transmitter, and a base antenna array. The base antenna array has a base station beamformer arranged to produce (a) a broad antenna beam so that the base station can receive random access signals from subscriber stations at different locations within the coverage area and transmit beacon or acknowledgment signals to the subscriber stations at the different locations, and (b) a narrow antenna beam directed to an acknowledged subscriber station for receiving or transmitting data or traffic signals from or to the subscriber station. A subscriber station includes a subscriber receiver, a subscriber transmitter and a subscriber antenna. The subscriber transmitter is arranged to transmit signals to a system base station on one or more of a number of carriers having a defined frequency spacing within a given spectrum allotment. A first carrier corresponds to a random access channel on which the subscriber station requests access, and at least a second one of the carriers is selected for transmission of data or traffic from the subscriber to the base station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.