Communication model, signal, method, and device for confirming reachability in network where host reachability is accomplished by relating static identifier to dynamic address
First Claim
1. Communication model characterized in that whether reachability to the destination communication node is true or false is determined by comparing the mapped image (at mapping announcement system ) of the pair consisting of a static identifier and dynamic address that indicate the destination communication node and the real image (at destination communication node ) of the pair consisting of a static identifier and dynamic address, in the store-and-forward network where host reachability is obtained by association of static identifier and dynamic address.
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Abstract
In a network where host reachability is accomplished by relating a static identifier to a dynamic address, the live/death of a communication node and reachability are confirmed by using a sign and countersign.
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Citations
52 Claims
- 1. Communication model characterized in that whether reachability to the destination communication node is true or false is determined by comparing the mapped image (at mapping announcement system ) of the pair consisting of a static identifier and dynamic address that indicate the destination communication node and the real image (at destination communication node ) of the pair consisting of a static identifier and dynamic address, in the store-and-forward network where host reachability is obtained by association of static identifier and dynamic address.
- 6. Carrier signal with the function of carrying information between the originator communication node and the destination communication node in a store-and-forward network consisting of the originator communication node, destination communication node, and mapping announcement system, and where host reachability is obtained by association of static identifier and dynamic address. Carrier signal carrying the reply that should be made when the destination communication node responds to the response request from the originator communication node.
- 8. Reachability check method by which the originator communication node is made to check reachability to the destination communication node in a store-and-forward network consisting of the originator communication node destination communication node, and mapping announcement system, and where host reachability is obtained by association of static identifier and dynamic address. Reachability check method characterized in that arbitrary information is stored at the mapping announcement system as the information used when making the originator communication node check reachability to the destination communication node and in that whether reachability to the destination communication node is true or false is determined by performing a given communication between the originator communication node and the destination communication node and then by comparing the reply that the destination communication node made to the originator communication node and the said stored arbitrary information.
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28. Communication node that is either a computer or network connection equipment;
- and that has a means to set at least a sign for each destination communication node, (and to also set the reply that ought to be made, when the reply is not the static identifier itself indicating the said destination communication node ), and to send the said sign to the said destination communication node ;
has a means to receive the countersign returned by the said destination communication node ;
has a means to compare the reply that should be made carried by the said received countersign and the said set reply that ought to be made; and
that checks whether reachability to the destination communication node is true or false based on whether the result of the comparison is true or false. - View Dependent Claims (29, 30, 31, 32, 33, 34, 35, 38, 39, 40, 41, 42, 43)
- and that has a means to set at least a sign for each destination communication node, (and to also set the reply that ought to be made, when the reply is not the static identifier itself indicating the said destination communication node ), and to send the said sign to the said destination communication node ;
- 36. Communication node (mapping announcement system) characterized in that when reachability check detects that the destination communication node is not present on the network, the mapping announcement system is reconfigured to not announce the mapped image, or the pair consisting of a static identifier and dynamic address of the destination communication node.
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44. Communication node that is either computer or network connection equipment in a store-and-forward network that consists of the originator communication node, destination communication node, and mapping announcement system, and where host reachability is obtained by association of a static identifier and dynamic address, whose address is assigned dynamically or communication node that is integrated with the said communication node and that is referenced from an external network, characterized in that it is configured in the following manner:
- arbitrary information used when the originator communication node queries the mapping announcement system about the destination communication node is stored at the storage device of the said communication node as the reply that should be made, and then the said stored information is read from the said storage device either for a sign or for communication that uses the previously agreed method, and then either a countersign including the said information as a minimum or a response to the communication that uses the previously agreed method.
- View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52)
Specification