A demand-assigned mixed TDMA and FDMA/TDMA system
Abstract
The concept of an effective demand-assigned satellite communications system is presented. High- and low-data rate TDMA terminals and large and small G/T earth stations can be employed at network nodes having a wide range of traffic requirements. With proper time-sharing of the satellite transponder, a mixed TDMA and FDMA/TDMA transmission mode can minimize terminal costs at nodes with low traffic requirements and maximizes the transponder throughput. Burst-rate reduction, centralized control for each subnetwork, and simple open-loop synchronization methods are employed at nodes with low traffic requirements to achieve cost reduction. It is shown that networks with nonhomogeneous traffic requirements can be cost-effectively served with such a system.
- Publication:
-
COMSAT Technical Review
- Pub Date:
- May 1982
- Bibcode:
- 1982COMTR..12..157F
- Keywords:
-
- Channel Capacity;
- Communication Satellites;
- Cost Reduction;
- Demand Assignment Multiple Access;
- Frequency Division Multiple Access;
- Time Division Multiple Access;
- Bit Synchronization;
- Central Electronic Management System;
- Communication Networks;
- Electronic Control;
- Frequency Synchronization;
- Packet Switching;
- Propagation Modes;
- Time Sharing;
- Transponders;
- Communications and Radar