Fault tolerant systems
AssigneeHewlett-Packard Development Company, L.P.
InventorSebastien Bouat
Life of this patent
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Abstract
According to one embodiment of the present invention, there is provided a method of storing context information in an outgoing message sent from a node using a protocol stack having at least one layer, comprising: selectively indicating to a layer of the protocol stack that context information should be obtained for that layer; obtaining context information in accordance with the indication; and adding the obtained context information to the outgoing message such that a response to the message contains the context information.
Claims36
A method of storing context information in an outgoing message sent from a node using a protocol stack having at least one layer, comprising:
- selectively indicating to a layer of the protocol stack that context information should be obtained for that layer;
- obtaining context information in accordance with the indication;
- and
- adding the obtained context information to the outgoing message such that a response to the message contains the context information.
A method of restoring the context information of a layer of a protocol stack of a node comprising:
- receiving a message;
- determining whether the context information of the layer should be restored;
- and, where it is so determined,
- determining the presence of context information relevant to the layer within the message;
- and
- restoring the context of the layer using context information from the message.
A system for storing context information in an outgoing message sent from a node using a protocol stack having at least one layer, comprising:
- means for indicating to a layer of the protocol stack that context information should be obtained for that layer;
- a module for obtaining context information in accordance with the indication;
- and
- a circuit for adding the obtained context information to the outgoing message such that a response to the message contains the context information.
A system of restoring the context information of a layer of a protocol stack of a node comprising:
- receiving means for receiving a message;
- logic for determining whether the context information of the layer should be restored;
- a circuit for determining the presence of context information relevant to the layer within the message;
- and
- restoration means for restoring the context of the layer using context information from the message.
A method of sending a message from a node through a hierarchical structure of one or more discreet layers comprising:
- indicating to a layer that context information should be obtained for that layer;
- obtaining context information in accordance with the indication;
- and
- adding the obtained context information to the message, such that a response to the message contains the context information.
A method of restoring the context information of a layer of a hierarchical structure of discreet layers comprising:
- receiving a message;
- determining whether the context information of the layer should be restored;
- and, where it is so determined,
- determining the presence of context information relevant to the layer within the message;
- and
- restoring the context of the layer using context information from the message.
Dependencies are inferred from the claim text.