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Data Flow Control at the Physical Layer Boundary

IP.com Disclosure Number: IPCOM000040230D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02

Publishing Venue

IBM

Related People

Authors:
Costes, M Jacoberger, W Ulivastro, R [+details]

Abstract

In the conventional architecture of the teleprocessing system, there is a flow control mechanism at the DLC (Data Link Control) level which resides in the main engine. The problem is that the time response of the current DLC flow control does not completely avoid overruns. The solution, described in this article, makes use of an additional DLC flow control. This new flow control has a fast response time and is performed without involving the DLC layer, as schematically shown in Fig. 1. As shown in Fig. 2, the two communicating adapters perform the new flow control in the following way: (Image Omitted) 1- Adapter A stacks the received frames into its buffer area.