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Title: Distributed circuit switching starnet

Abstract

Starnet is a communication subnet which can cost-effectively connect hundreds or thousands of processors for distributed processing. It uses distributed control and circuit switching. Starnet's communication medium includes two major components: a multistage interconnection network and a set of interface units. The interconnection network uses a destination routing scheme with no central control. The interface unit provides handshaking between the computer/data node and the interconnection network under the control of a microprocessor. Detailed design of the communication medium is described. A model for comparing cost-effectiveness among starnet, crossbar and multiple buses is included. 7 references.

Authors:
; ;
Publication Date:
OSTI Identifier:
5248003
Report Number(s):
CONF-820829-
Resource Type:
Conference
Resource Relation:
Conference: International conference on parallel processing, Bellaire, MI, USA, 24 Aug 1982
Country of Publication:
United States
Language:
English
Subject:
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE; COMPUTER NETWORKS; COMMUNICATIONS; DISTRIBUTED DATA PROCESSING; SWITCHING CIRCUITS; DATA PROCESSING; ELECTRONIC CIRCUITS; PROCESSING 990200* -- Mathematics & Computers

Citation Formats

Chuan-lin Wu, Woei Lin, and Min-chang Lin. Distributed circuit switching starnet. United States: N. p., 1982. Web.
Chuan-lin Wu, Woei Lin, & Min-chang Lin. Distributed circuit switching starnet. United States.
Chuan-lin Wu, Woei Lin, and Min-chang Lin. 1982. "Distributed circuit switching starnet". United States. doi:.
@article{osti_5248003,
title = {Distributed circuit switching starnet},
author = {Chuan-lin Wu and Woei Lin and Min-chang Lin},
abstractNote = {Starnet is a communication subnet which can cost-effectively connect hundreds or thousands of processors for distributed processing. It uses distributed control and circuit switching. Starnet's communication medium includes two major components: a multistage interconnection network and a set of interface units. The interconnection network uses a destination routing scheme with no central control. The interface unit provides handshaking between the computer/data node and the interconnection network under the control of a microprocessor. Detailed design of the communication medium is described. A model for comparing cost-effectiveness among starnet, crossbar and multiple buses is included. 7 references.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1982,
month = 1
}

Conference:
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  • The communication costs for parallel versions of two simple algorithms used in image processing are compared in packet switching and circuit switching formulations. The two algorithms are smoothing and histogramming. The histogramming algorithm, the recursive doubling algorithm of Stone (1975), is studied over a range of processor numbers and pixel intensity resolution. The packet and circuit switching properties of the interconnection networks of the multiprocessor systems are based on two network architectured multiprocessors which are well-documented in the literature, PASM and TRAC. Communication based upon circuit switching generally gives a somewhat lower communication cost with the advantage increasing with pixelmore » intensity resolution. The results of the analysis suggest a high utility value for including both circuit switching and packet switching functionality in the networks of network architectured multiprocessor systems. 8 references.« less
  • The h-network is a high-speed distributed local computer network designed to facilitate user interaction and control of the homogeneous multiprocessor. The topology of the network and its access protocol are discussed. Performance measures based on analysis of the protocol and the hardware used are presented. 3 references.
  • The standard SF/sub 6/ puffer circuit breaker is presented that can be used to switch very high capacitive currents. The breaker is ideal for capacitor and cable switching applications.
  • Staged cricuit switching (SCS) is a message-switching technique which combines a new protocol with new communication hardware. Protocol and hardware are designed specifically for networks which are intended to function as integrated, general-purpose MIMD machines, i.e. for network computers. The SCS protocol is a form of circuit switching which degrades automatically into packet switching when unavailable output lines make further extension of a partial circuit impossible. The SCS hardware uses a front-end crossbar switch to multiplex some small number of communication channels among all of a given node's incident links. Together, hardware and protocol represent an attempt to convert sparemore » bandwidth into lower network delays. They also allow experimentation with networks which reconfigure themselves dynamically in response to measured traffic patterns. SCS is compared with packet switching, circuit switching and the virtual cut-through protocol of P. Kermani and L.Kleinrock (see Comput. Networks, vol.3, p.267, 1979, and IEEE Trans. Comput. C-29,12, p.1052, December 1980), and an SCS implementation designed for the SBN network computer is discussed. 23 references.« less
  • The authors have designed and begun testing a high speed superconducting switch. Our switches are lines of Nb about 400 A thick, 2 ..mu..m wide, and 2 mm long on a sapphire substrate. The switching is done by illuminating the line with a laser through an optical fiber. The photons break Cooper pairs mostly by scattering, since the film thickness is on the order of the superconductor's coherence length and the optical penetration depth. The order parameter and critical current are depressed to zero through nonequilibrium dynamics, with the film remaining below its thermodynamic transition temperature. Thus, in principle, themore » switching rates are limited by the quasiparticle recombination time, rather than by the slower time of phonon escape from the film. The noise seen in the normal state is comparable to that in the superconducting state, and the authors we have utilized switching rates up to 300 kHz.« less