Browse Prior Art Database

Contention Recovery in Start/Stop Communication Protocol

IP.com Disclosure Number: IPCOM000054019D
Original Publication Date: 1980-Dec-01
Included in the Prior Art Database: 2005-Feb-12

Publishing Venue

IBM

Related People

Authors:
Girardi, S Kmiecik, S [+details]

Abstract

When a start stop terminal operates in half duplex transmission mode via a full duplex transmission facility, it is impossible to know whether a contention will occur or not, as both ends - terminal and host - may initiate a transmission simultaneously. The proposed solution prevents data from being lost should a transmission occur in contention mode, since the start-stop line communication protocol does not provide facilities for retransmission.