Signaling processor and link switching method
AssigneeNEC Corporation
InventorKouichi Matsumoto
Life of this patent
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Abstract
A signaling processor has a message transfer part for a Layer 2 operable to notify a message transfer part for a Layer 3 of a signal indicative of stop (release) completion of a link being connected when it receives a response to a request for a link release process after detection of a failure of the link being connected and notification of the request for the link release process to a correspondent signaling processor and a message transfer part for the Layer 3 operable to perform a retrieval process of a received signal that has not been retrieved and has been stored in the message transfer part for the Layer 2 when it receives the signal indicative of stop (release) completion of the link.
Claims15
A signaling processor for use in detecting a failure of a link being connected, comprising a message transfer part for a Layer 2;
- and a message transfer part for a Layer 3,
- wherein, after detection of the failure of the link and notification of a request for a link release process to a correspondent signaling processor, the message transfer part for the Layer 2 notifies the message transfer part for the Layer 3 of a signal indicative of stop (release) completion of the link being connected when it receives a response to the request for the link release process,
- wherein the message transfer part for the Layer 3 performs a retrieval process for a received signal that has not been retrieved and has been stored in the message transfer part for the Layer 2 when it receives the signal indicative of stop (release) completion of the link.
A link switching method comprising:
- a failure detection step in which a signaling processor having a message transfer part for a Layer 2 and a message transfer part for a Layer 3 detects a failure of a link being connected between the signaling processor and a correspondent signaling processor;
- a request notification step of notifying the correspondent signaling processor of a request for a link release process;
- a stop notification step in which the message transfer part for the Layer 2 notifies the message transfer part for the Layer 3 of a signal indicative of stop (release) completion of the link being connected when it receives a response to the request for the link release process;
- a retrieval step in which the message transfer part for the Layer 3 performs a retrieval process for a received signal that has not been retrieved and has been stored in the message transfer part for the Layer 2 when it receives the signal indicative of stop (release) completion of the link;
- and
- a switching step of switching the link between the signaling processor and the correspondent signaling processor after the retrieval process for the received signal that has not been retrieved.
Dependencies are inferred from the claim text.