Method and apparatus for routing a packet within a plurality...

Details Method and apparatus for routing a packet within a plurality... Method and apparatus for routing a packet within a plurality...

2003-03-31

2009-06-02

Nguyen, Brian D (Department: 2416)

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

C370S256000, C370S408000

Reexamination Certificate

active

07542470

ABSTRACT:
A method and apparatus are provided for routing a packet within a plurality of n nodes arranged in a line or tree (or a combination of the foregoing), given a maximum stack depth, s. A fixed stack process for routing packets on a line given a stack depth, s, initially divides a line of n nodes into segments, such as n1/sapproximately equal segments. A unique label is assigned to each segment and, within each segment, one of up to n1/slabels is assigned to each node. A fixed stack process for routing packets on a tree, given a target stack depth, s, initially identifies a subset, S, of at nodes from the tree, such as at most 3 n1/snodes, such that after the subset, S, is removed, each remaining subtree has at most n(s-1)/snodes. A unique label is assigned to each of the nodes in the subset S and, within each remaining subtree, one of up to n(s-1)/slabels is assigned to each node. If the bound on the stack depth cannot be violated, the fixed stack routing process merges every two consecutive levels in the stack to one level.

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