Automatic power level control of a packet communication link
US5465398A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 7, 1993 |
| Grant date | Nov 7, 1995 |
| Priority date | — |
| Expiry date | Oct 7, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W52/225
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a wireless LAN packet communication system, for each successfully received packet the strength of the received signal is measured at a target node by monitoring an A/D converted rssi (received signal strength indication) signal. A record of minimum strength among successfully received packets is maintained at the target node. For each succesfully received packet the difference between the signal strength of the packet and the recorded minimum is calculated at the target node and sent over the link to the source node as a quantitative difference indicator. The source node maintains a moving average of difference indicators received over time and adjusts the transmitter power level so as to maintain the moving average at a preselected link margin threshold level. Alternatively, the calculation of a desired source node power level change is performed at the target node and transmitted to the source node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.