Method and apparatus for increasing the system efficiency of a TDMA system by reducing time slot guard time
US5710765A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1996 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | Mar 29, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0682
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A TDMA system with a TDMA frame format that requires no guard time, or with a maximum guard time of one clock cycle of the high timing base is applied to a network with a fixed central base, or headend, and remote units, called Premises Interface Devices (PIDs), which have a fixed communication media, such as a cable, between the headend and PID. This TDMA system is particularly useful for increasing system efficiency for CATV applications. The system method works as follows: a remote PID attempting to access the system sends a short data burst to the headend. By measuring the time difference between the time reference and the beginning of the uplink signal received, the headend will send timing correction/adjustment information to the PID. The PID then adjusts the timing of its data bursts, optionally sends a trial message and, once a verified correct transmission is acknowledged by the headend, sends regular data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.