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System for routing messages in a vertex symmetric network by using addresses formed from permutations of the transmission line indicees

Patent ·
OSTI ID:868362
 [1];  [1]
  1. Los Alamos, NM
+ Show Author Affiliations
A network of interconnected processors is formed from a vertex symmetric graph selected from graphs .GAMMA..sub.d (k) with degree d, diameter k, and (d+1)!/(d-k+1)! processors for each d.gtoreq.k and .GAMMA..sub.d (k,-1) with degree 3-1, diameter k+1, and (d+1)!/(d-k+1)! processors for each d.gtoreq.k.gtoreq.4. Each processor has an address formed by one of the permutations from a predetermined sequence of letters chosen a selected number of letters at a time, and an extended address formed by appending to the address the remaining ones of the predetermined sequence of letters. A plurality of transmission channels is provided from each of the processors, where each processor has one less channel than the selected number of letters forming the sequence. Where a network .GAMMA..sub.d (k,-1) is provided, no processor has a channel connected to form an edge in a direction .delta..sub.1. Each of the channels has an identification number selected from the sequence of letters and connected from a first processor having a first extended address to a second processor having a second address formed from a second extended address defined by moving to the front of the first extended address the letter found in the position within the first extended address defined by the channel identification number. The second address is then formed by selecting the first elements of the second extended address corresponding to the selected number used to form the address permutations.
Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM
DOE Contract Number:
W-7405-ENG-36
Assignee:
United States of America as represented by Department of Energy (Washington, DC)
Patent Number(s):
US 5125076
OSTI ID:
868362
Country of Publication:
United States
Language:
English

References (5)

Strategies for interconnection networks: Some methods from graph theory journal December 1986
A group-theoretic model for symmetric interconnection networks journal April 1989
Vertex-transitive graphs journal October 1964
A Design for Directed Graphs with Minimum Diameter journal August 1983
Deadlock-Free Message Routing in Multiprocessor Interconnection Networks journal May 1987

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