Broadband network having an upstream power transmission level that is dynamically adjusted as a function of the bit error rate
US5606725A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1994 |
| Grant date | Feb 25, 1997 |
| Priority date | — |
| Expiry date | Nov 29, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04H20/77
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A broadband network, such as a cable television (CATV) system, for two-way digital communications between a headend and a number of remote terminals dynamically adjusts the power of the upstream signal transmitted by each remote terminal to maintain the bit error rate (BER) of the upstream signal received by the headend below a predetermined limit. In particular, each remote terminal includes a data receiver for receiving signals from the headend (including control signals), and a data transmitter for transmitting digital data signals upstream to the headend. The power level of the data transmitter can be adjustably controlled by the control signals from the headend. The headend includes a data receiver for receiving upstream signals from each of the remote terminals, error detection circuitry for detecting errors in the upstream signals, a data transmitter for transmitting signals to the remote terminals (including control signals), and a processor for calculating the rate at which errors are detected by the error detection circuitry for each remote terminal. The processor directs the data transmitter to transmit control signals to: (1) increment the transmitting power level for a…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.