Ring control node

• US 6,993,684 B2
• Filed: 06/06/2002
• Issued: 01/31/2006
• Est. Priority Date: 01/29/2002
• Status: Expired due to Fees

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Ookawa, Naokatsu, Okamoto, Takuya, Honda, Takashi
• Primary Examiner(s): Baderman, Scott
• Assistant Examiner(s): LOHN, JOSHUA A
• Application Number:
  US10/164,509
• Publication Number:
  US 20030145254A1
• Time in Patent Office: 1,335 Days
• Field of Search: 714/43, 714/4, 370/224, 370/222, 709/251
• US Class Current: 714/43
• CPC Class Codes: H04L 41/00 Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks

Abstract

The present invention relates to a ring system, in particular to a ring control node which increases the upper limit of the number of nodes that can be arranged on one ring by a BLSR control and conforms to an increase in line capacity and the scale of a system. The ring control node made of a plurality of nodes for performing ring control, and spans for connecting the plurality of nodes in a ring shape, and each of the nodes detects a fault occurring in a span between itself and another node adjacent thereto, and transmits the fault information to the other node using, as a destination, a span ID assigned to the span.

Claims

1. A ring control node comprising:

a plurality of nodes for performing ring control, and

spans for connecting said plurality of nodes in a ring shape,

wherein each of the plurality of nodes detects a fault occurring in a span between itself and another node adjacent thereto, and transmits fault information to said other node, using a span ID assigned to a pair of said span and either one of two nodes each connected to one end of said span.

2. The ring control node according to claim 1, wherein each of said nodes forms a topology map of the entire ring in which a node ID assigned to a node on either one of an adjacent east side and west side enclosing one of the above spans corresponds to a span ID of said span.

3. The ring control node according to claim 2, wherein each of said nodes determines a destination of said fault information by means of the span ID, and performs a path through operation on the fault information when the destination is that of a node other than itself.

4. The ring control node according to claim 3, wherein adjacent nodes enclosing said span detect a nonconformity in a topology map by means of the span ID of the span common to both of the nodes.

5. The ring control node according to claim 1, wherein the ring control is a BLSR control, and substitutes the span ID for the transmitting node ID and the receiving node ID of the BLSR control.

6. A ring control node comprising:

a plurality of nodes for performing ring control, and

spans for connecting said plurality of nodes in a ring shape,

wherein each of the plurality of nodes detects a fault occurring in a span between itself and another node adjacent thereto, and transmits fault information to said other node using as a destination a span ID assigned to said span,

wherein adjacent nodes enclosing said span detect a nonconformity in a topology map by means of the span ID of the span common to both of the nodes.

7. A ring control node comprising:

a plurality of nodes for performing ring control, and

spans for connecting said plurality of nodes in a ring shape,

wherein each of the plurality of nodes detects a fault occurring in a span between itself and another node adjacent thereto, and transmits fault information to said other node using as a destination a span ID assigned to said span,

wherein the ring control is a BLSR control, and substitutes the span ID for the transmitting node ID and the receiving node ID of the BLSR control.