Title:
PHOTONIC NODE AND PHOTONIC NETWORK
Document Type and Number:
Japanese Patent JP3717866
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To realize a photonic network of high flexibility to flexibly deal with addition of a new path, even if the photonic network is constituted, while effectively using network resources by using a few 3R (reshaping, retiming and regenerating) repeaters.
SOLUTION: When setting path, the number of non-repeater reachable nodes is calculated, the node being a node positioned at a limit to perform transfer of an optical signal, without requiring the 3R repeater in assuming that the own node is a source node. The calculation result and the number of 3R repeaters own node has are announced to the other nodes. The information. about the number of non-repeater reachable nodes and the 3R repeaters, which are announced from another node, are summed respectively so as to correspond to addresses of the other nodes. The 3R repeater nodes are selected so that the number of 3R repeaters becomes as small as possible to the number of destinations nodes. When there are a plurality of 3R repeater node candidates, a candidate having the largest margin of 3R repeating performance is selected.
Inventors:
Naoaki Yamanaka
Satoru Okamoto
Shiomoto Kohei
Satoru Okamoto
Shiomoto Kohei
Application Number:
JP2002140548A
Publication Date:
November 16, 2005
Filing Date:
May 15, 2002
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04L45/02; (IPC1-7): H04L12/56
Domestic Patent References:
| JP200277207A | ||||
| JP2003229891A | ||||
| JP2003249903A | ||||
| JP2003259403A | ||||
| JP2003234823A |
Other References:
2002年信学総合大会 B-12-3
ICC 2002,p2812-2816
ICC 2002,p2812-2816
Attorney, Agent or Firm:
Naotaka Ide
Toshinao Shimodaira
Toshinao Shimodaira