Communication device that performs automatic failure...

Details Communication device that performs automatic failure... Communication device that performs automatic failure...

2006-05-09

2006-05-09

Beausoliel, Robert (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C398S001000, C370S216000

Reexamination Certificate

active

07043662

ABSTRACT:
If failure is detected in multiple layers, a failure detection recovery processing unit is activated simultaneously in each layer and performs operations up to immediately before switching a main signal. The first layer to reach that stage notifies the other layer of this fact through inter-layer failure recovery information communication terminal and processing units to stop the failure recovery operation of the other layer. The other layer sends back a response to it through the inter-layer failure recovery information communication terminal and processing units, and the layer that first reaches the stage up to immediately before actually switches the main signal based on the result of the response.

REFERENCES:
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patent: 6718480 (2004-04-01), Ogura et al.
patent: 6760860 (2004-07-01), Fong et al.
patent: 2001/0032325 (2001-10-01), Fong et al.
patent: 2003/0163555 (2003-08-01), Battou et al.
patent: 2000-278285 (2000-10-01), None
ITU-T Recommendation G.709/Y.1331, Series G: Transmission Systems and Media, Digital Systems and Networks, Interfaces for the optical transport network, International Telecommunication Union (Feb. 2001) pp. 16-17.
ITU-T Recommendation G.872 (Draft 1.6), “Architecture of optical transport networks,” ITU-T Study Group 13 (Oct. 2001), pp. 38-42.

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