Stacked address transport in connection-oriented networks

Details Stacked address transport in connection-oriented networks Stacked address transport in connection-oriented networks

H - Electricity

04

L

H04L 12/66 (2006.01) H04L 12/12 (2006.01) H04L 12/56 (2006.01)

Patent

CA 2240632

37 There is provided a method of signalling a message using a terminal address across multiple network entities. At least two contiguous network entities are associated with addressing spaces for which message addresses are not routable by way of the terminal address and are not otherwise mutable by way of a single address. The method involves storing a terminal address of either an originating network entity or a terminating network entity as a party number. The message is routed according to the party number from the originating network entity through each succeeding and contiguous intermediate network entity, if any, which provides an addressing space through which the message is mutable. At every network border between any two contiguous network entities wherein an immediately succeeding network entity does not provide an addressing space through which the message is routable, it is determined whether the party number is to be stored and replaced with a new party number. If so, the party number is stored so as to permit its subsequent retrieval according to a last-in and first-out precedence to thereby create a stored party number. Once the party number has been stored, a replacement address is assigned as the party number. Also at every such border, it is determined whether the party number is to be discarded and replaced with a stored party number. If so, the last-in stored party number is assigned as the party number. The message is then routed according to the party number and, with the message, every stored party number is transported through the immediately succeeding intermediate network entity and through each further succeeding and contiguous intermediate network entity, if any, through which the message is routable. The step of determining whether the party number is to be stored and replaced, that of determining whether it is to be discarded and replaced, and that of routing the message and stored party numbers through succeeding intermediate network entities are all repeated until such time as the message is mutable to the terminating network entity according to the party number.

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