Self-healing meshed network using logical ring structures

Details Self-healing meshed network using logical ring structures Self-healing meshed network using logical ring structures

1993-06-22

1994-07-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 161, 370 8512, 30482505, H04J 302

Patent

active

053274270

ABSTRACT:
Logical hybrid ring arrangements are disclosed which can withstand a cut communication path or a failed node. A logical ring is formed by a cascade of (i) physical hybrid ring segments, each composed of a pair of unidirectional communication paths propagating multiplexed subchannels and interposed add-drop multiplexer nodes, and (ii) cross-connect nodes terminating the segments. Each cross-connect node routes an incoming subchannel from one segment to an outgoing subchannel on another segment. Each segment may operate at a different multiplexed signal rate, so a logical ring can be composed of segments operating at different rates. Moreover, subchannels on an incoming segment may be allocated to a plurality of outgoing segments, thereby configuring multiple logical rings which may serve to balance communication traffic over the logical rings.

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"Wideband and Broadband Digital Cross-Connect Systems Generic Requirements and Objectives" Technical Reference TR-TSY-000233, Issue, 2, published Sep. 1989, pp. 5-1-5-13 by Bell Communications Research, Inc.

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