Browse Prior Art Database

Use of Broadcast Ports in TDMA Satellite Networks

IP.com Disclosure Number: IPCOM000051771D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Ulmer, S: AUTHOR

Abstract

This article describes a method to fully connect the nodes in a TDMA (time division multiple access) satellite network, based on the use of the broadcast port of TDMA satellite communication controllers.

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Use of Broadcast Ports in TDMA Satellite Networks

This article describes a method to fully connect the nodes in a TDMA (time division multiple access) satellite network, based on the use of the broadcast port of TDMA satellite communication controllers.

A network of N nodes, fully connected via point-to-point links, requires L=2N(N-1) one-way data ports.

It is proposed to install in each node one broadcast transmit port and N-1 receive ports. A broadcast port is a one-way transmit data port, to which one one-way receive data port is associated in each of the N-1 other nodes. Whatever data is sent through this transmit port is received by all associated receive ports.

The use of broadcast ports to fully connect N nodes of a TDMA satellite network has two advantages when compared to dedicated point-to-point links:

1. A smaller number of ports is required, both on the communication controller (Data Transmission Equipment (DTE)) and on the satellite access equipment (Data Communication Equipment (DCE)). A network using the broadcast port requires: N transmit and N(N 1) receive ports, i.e., a total of N/2/ one-way ports, to be compared with L above. The economy of the broadcast solution approaches 50% in networks with many nodes.

2. A smaller space segment (global data rate) is required, because the multiplexing of several data flows into one channel provides dynamic bandwidth allocation between these flows.

When the nodes are connected via point-to-point links, the b...