Showing papers on "Physical layer published in 1982"
IBM1
TL;DR: The communication loops analyzed here provide an economical way of attaching many different terminals to a IBM 4331 host processor which may be several kilometers away.
Abstract: The communication loops analyzed here provide an economical way of attaching many different terminals to a IBM 4331 host processor which may be several kilometers away.As a first step of the investigation protocol overhead is derived. It consists of request and transmission headers and the associated acknowledgements as defined by the System Network Architecture. Additional overhead is due to the physical layer protocols of the Synchronous Data Link Control including lower level confirmation frames.The next step is to describe the performance characteristics of the loop attachment hardware, primarily consisting of the external loop station adapters for local and teleprocessing connections and the loop adapter processor.
1 citations
TL;DR: The paper discusses the design issues affecting the software architecture and the hardware configuration, and describes the current implementation in detail, including software aspects and the physical layer.
1 citations
20 Sep 1982
TL;DR: This paper describes a first step towards the investigation of the interaction of protocols from different protocol layers, where the main interest is in multiaccess channels with corresponding as si gnment techniques.
Abstract: This paper describes a first step towards the investigation of the interaction of protocols from different protocol layers. The layers we are concerned with are the link layer and the physical layer, where the main interest is in multiaccess channels with corresponding as si gnment techniques. Our starting point is a basic queueing network model which saves as a frame for the concrete modeling of the different protocol strategies. For the link-strategies “Go-Back-n” and “Selective-Reject” the frame is filled with the appropriate queueing nets as well as for a simple Half-Duplex-Channel. Finally first results are presented.