Title:
MULTICAST TRANSFER ROUTING METHOD, MULTICAST TRANSFER ROUTING APPARATUS AND PROGRAM
Document Type and Number:
Japanese Patent JP3755527
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a multicast transfer routing method with which inter-user delay variance can be reduced.
SOLUTION: Topology information and delay information are used for delay minimum routing from a starting node to an ending node for each ending node, a node on one of a plurality of delay minimum routing from the starting node to each ending node is selected as a candidate node of summarized point node in multicast transfer, delay minimum routing from the candidate node to the ending node is calculated for each ending node for each candidate node, and a difference between a maximum value and a minimum value in delays of a plurality of delay minimum routing for each ending point is obtained. A candidate node where the difference is minimum is then selected as a summarized point node, and the delay minimum routing from the starting point to the summarized point node and each of delay minimum routing from the summarized point node to each ending point are outputted as a multicast transfer route.
Inventors:
Masayoshi Yasukawa
Koji Sugizono
Natsumi Uga
Koji Sugizono
Natsumi Uga
Application Number:
JP2003409013A
Publication Date:
March 15, 2006
Filing Date:
December 08, 2003
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04L45/121; H04L45/122; H04L45/16; (IPC1-7): H04L12/56
Domestic Patent References:
| JP11225159A | ||||
| JP8242226A | ||||
| JP2002232466A | ||||
| JP10322358A |
Attorney, Agent or Firm:
Tadahiko Ito
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