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Parallel Token Rings Used As a Non-Blocking Digital Switch Node

IP.com Disclosure Number: IPCOM000062703D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Tice, VL: AUTHOR [+2]

Abstract

This article describes a new application of the existing IEEE 802.4 token ring technology. Token rings were designed, and are currently thought of as a transmission medium to provide connectivity in local area networks. The new application of this technology is the use of token rings to provide a non-blocking digital switching node. The figure depicts the relationship of the key elements of a digital switch node. One or more token rings conform to the IEEE 802.4 standard. This medium must provide the bandwidth required to support the maximum throughput of the most demanding connectivity component. With the token rings connected in parallel, this medium must support the maximum throughput when all connectivity components are active.

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Parallel Token Rings Used As a Non-Blocking Digital Switch Node

This article describes a new application of the existing IEEE 802.4 token ring technology. Token rings were designed, and are currently thought of as a transmission medium to provide connectivity in local area networks. The new application of this technology is the use of token rings to provide a non-blocking digital switching node. The figure depicts the relationship of the key elements of a digital switch node. One or more token rings conform to the IEEE 802.4 standard. This medium must provide the bandwidth required to support the maximum throughput of the most demanding connectivity component. With the token rings connected in parallel, this medium must support the maximum throughput when all connectivity components are active. Local connectivity components constitute one or more sets of logic (hardware/software/firmware) subsystems that support distribution of a portion of the bandwidth to a set of local users.

Remote connectivity components constitute one or more sets of logic (hardware/software/ firmware) subsystems that support distribution of a portion of the bandwidth to remote users (i.e., remote users attached to remote digital switches via wide area network/media). Equivalents that can be substituted for the token rings are any other media that can provide the same attributes, especially the attributes of fairness, that characterize the token ring technology. An example of an equivalent...