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Journal ArticleDOI

Analysis of Protocol Layer Residency in the Host-NIU System of a Network Node

01 May 1993-Iete Journal of Research (Taylor & Francis)-Vol. 39, Iss: 3, pp 165-178
TL;DR: OSInet, a networking software implementing a carefully chosen subset of ISO-OSI model for LANs, was used for this work and significant improvement in the throughput of a network node was measured, due to proper partitioning of protocol software between a host machine and an intelligent NIU.
Abstract: A general host-NIU pair, and various issues related to partitioning of a protocol software between the host machine and the intelligent Network Interface Unit (NIU) are discussed. A methodology to arrive at Optimal Protocol Partition, in a typical network node executing arbitrary protocol software is given. Analytical model is suggested to estimate the performance of the partitioned protocol stack, in a host-NIU pair. The implementation work carried out at IIT Madras, to understand the partitioning of the OSI protocol layers is described. OSInet, a networking software implementing a carefully chosen subset of ISO-OSI model for LANs, was used for this work. Significant improvement in the throughput of a network node was measured, due to proper partitioning of protocol software between a host machine and an intelligent NIU.
References
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Proceedings ArticleDOI
01 Aug 1990
TL;DR: This paper identifies two new design principles, Application Level Framing and Integrated Layer Processing, and identifies the presentation layer as a key aspect of overall protocol performance.
Abstract: The current generation of protocol architectures, such as TCP/IP or the ISO suite, seem successful at meeting the demands of todays networks. However, a number of new requirements have been proposed for the networks of tomorrow, and some innovation in protocol structuring may be necessary. In this paper, we review some key requirements for tomorrow's networks, and propose some architectural principles to structure a new generation of protocols. In particular, this paper identifies two new design principles, Application Level Framing and Integrated Layer Processing. Additionally, it identifies the presentation layer as a key aspect of overall protocol performance.

1,083 citations

Proceedings ArticleDOI
01 Aug 1991
TL;DR: A host interface 1 for an asynchronous transfer mode (ATM) network comprises a Segmenter 2 and Reassembler 3, capable of reassembling an ATM cell in less than 2.7 microseconds.
Abstract: A host interface 1 for an asynchronous transfer mode (ATM) network comprises a Segmenter 2 and Reassembler 3. The host interface 1 is connected to a Sunshine ATM switch 7 via an electrical to optical converter 6 and an IBM RS/6000 workstation 4 via a MicroChannel bus 5. The Reassembler 3 comprises three components, respectively referred to as the Linked List Manager, Dual Port Reassembly Buffer and SONET Interface and VCI Lookup Controller, that are capable of concurrent operation once they are initialized and configured. Those components are capable of reassembling an ATM cell in less than 2.7 microseconds.

254 citations

Journal ArticleDOI
TL;DR: The design of the Versatile Message Transaction Protocol is described and some performance measurements of the protocol used in the V-Distributed System are described and it is shown that VMTP addresses all of the above issues within a single protocol without significant compromise.
Abstract: The authors identify and discuss three major categories of deficiencies in current transport protocols: performance, naming, and functionality. They describe the design of the Versatile Message Transaction Protocol (VMTP) and some performance measurements of the protocol used in the V-Distributed System. They show that VMTP addresses all of the above issues within a single protocol without significant compromise. >

144 citations

Proceedings ArticleDOI
01 Aug 1991

111 citations

Journal ArticleDOI
TL;DR: An approximation is introduced for the mean value analysis of queueing networks with transfer blocking based on the modification of mean residence times, due to the blocking events that occur in the network.
Abstract: An approximation is introduced for the mean value analysis of queueing networks with transfer blocking. The blocking occurs when a job, after completing service at a station, wants to join a station which is full. The job resides in the server of the source station until a place becomes available in the destination station. The approximation is based on the modification of mean residence times, due to the blocking events that occur in the network. Several examples are executed that validate the approximate results. >

68 citations