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US 7,606,224 B2Granted
Transmission apparatus for making ring switching at SONET/SDH and RPR levels
AssigneeFujitsu Limited
InventorsMorihito Notani, Masahiro Nishio
Life of this patent
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Abstract
A transmission apparatus includes an aggregate-side interface unit coupled to an optical transmission line, a cross-connect unit which performs cross-connect with respect to a synchronized digital signal supplied from the aggregate-side interface unit, and a network signal processing unit which switches the synchronized digital signal in a unit of a network signal as the synchronized digital signal is supplied from the cross-connect unit.
Claims8
A transmission apparatus, comprising:
- an aggregate-side interface unit coupled to an optical transmission line;
- a cross-connect unit which perform cross-connect with respect to a synchronized digital signal supplied from said aggregate-side interface unit;
- a network signal processing unit which switches the synchronized digital signal in a unit of a network signal as the synchronized digital signal is supplied from said cross-connect unit;
- wherein said network signal processing unit further includes a flow monitoring and adjusting unit which monitors and adjusts an amount of flow of the synchronized digital signal supplied from said cross-connect unit, and the flow monitoring and adjusting unit is configured to send a request to the cross-connect unit when an amount of RPR (resilient packet ring) packets exceeds a tolerable level, to request the cross-connect unit that no more RPR packets be transmitted, and
- wherein the network signal is an RPR frame signal.
2 more elements
Dependencies are inferred from the claim text.