A Reduced Operation Protocol Engine (ROPE) for a multiple-layer bypass architecture [chapter]

Y. H. Thia, C. M. Woodside
<span title="">1995</span> <i title="Springer US"> <a target="_blank" rel="noopener" href="https://fatcat.wiki/container/kss7mrolvja63k4rmix3iynkzi" style="color: black;">IFIP Advances in Information and Communication Technology</a> </i> &nbsp;
The Reduced Operation Protocol Engine (ROPE) presented here offtoads critical functions of a multiple-layer protocol stack, based on the "bypass concept" of a fast path for data transfer. The motivation for identifying this separate processing path is that it involves only a small subset of the complete protocol, which can then be implemented in hardware. Multiple-layer bypass also eliminates some inter-layer operations such as queue and buffer management, context switching and movement of data
more &raquo; ... across layers, all of which are a significant overhead. ROPE is intended to support high-speed bulk data transfer. The paper describes the design of a ROPE chip for the OSI Session and Transport layer protocols, using VHDL. The design is practical in terms of chip complexity and area, using current gate array technology, and simulation shows that it can support a data rate approaching 1 gigabit per second, in a connection attached to an end-system. D Partitioning the functionality between the host and the adaptor is difficult and may easily lead to a complex additional protocol between the two parts, which may cancel out or offset the potential gain from offloading. For example, the buffer management task [36] may be offtoaded, but this leaves the problem of control for accessing it within the full protocol logic.
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