Inter-domain QoS reservation establishment and modification
First Claim
1. A method for establishing an inter-domain QoS reservation between a first node in a first domain and a second node in a second domain, the first and second domains being connected via a series of routers, the method comprising the steps of:
- detecting, at the first node, that the inter-domain QoS reservation with at least one QoS characteristic is needed;
obtaining, at the first node, network state information associated to the first domain;
obtaining, at the first node, network state information associated to at least one possible choice of path between the first domain and the second domain;
determining, at the first node, at least one choice of path between the first node and the second node in view of the at least one QoS characteristic;
selecting, at the first node, from the at least one choice of path a selected path to support the inter-domain QoS reservation; and
sending, from the first node and addressed to the second node, a reservation message to trigger establishment of the inter-domain QoS reservation.
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Abstract
A Resource Manager node and methods for establishing and modifying an inter-domain QoS reservation between a first node in a first domain and a further node in a further domain. After detection that the QoS reservation with at least one QoS characteristic is needed or needs to be refreshed, obtaining, at the first node, network state information associated to at least one possible choice of path between the first domain and the further domain. Thereafter, determining at least one choice of path between the first domain and the second domain in view of the at least one QoS characteristic, selecting a selected path to support the QoS reservation and sending a reservation message to trigger establishment of the inter-domain QoS reservation.
53 Citations
14 Claims
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1. A method for establishing an inter-domain QoS reservation between a first node in a first domain and a second node in a second domain, the first and second domains being connected via a series of routers, the method comprising the steps of:
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detecting, at the first node, that the inter-domain QoS reservation with at least one QoS characteristic is needed;
obtaining, at the first node, network state information associated to the first domain;
obtaining, at the first node, network state information associated to at least one possible choice of path between the first domain and the second domain;
determining, at the first node, at least one choice of path between the first node and the second node in view of the at least one QoS characteristic;
selecting, at the first node, from the at least one choice of path a selected path to support the inter-domain QoS reservation; and
sending, from the first node and addressed to the second node, a reservation message to trigger establishment of the inter-domain QoS reservation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for modifying an established inter-domain QoS reservation maintained on an end-to-end path between a first node in a first domain and a second node in a second domain, the first and second domains being connected via a series of routers, the method comprising the steps of:
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detecting, at an intermediate node of the series of routers, that the inter-domain QoS reservation with at least one QoS characteristic needs to be refreshed;
obtaining, at the intermediate node, network state information associated to its domain;
if the domain of the intermediate node is not the second domain;
obtaining, at the intermediate node, network state information associated to at least one possible choice of path between the domain of the intermediate node and the second domain;
determining, at the intermediate node, at least one alternate choice of path between the intermediate node and the second node respecting the at least one QoS characteristic;
selecting, at the intermediate node, from the at least one alternate choice of path a selected path to support the inter-domain QoS reservation; and
if the selected path changes the end-to-end path of the inter-domain QoS reservation toward the second node;
sending, from the intermediate node and addressed to the second node, a reservation message to trigger establishment of the inter-domain QoS reservation. - View Dependent Claims (12, 13)
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14. A Resource Manager Node (RM) for establishing and modifying an inter-domain QoS reservation on an end-to-end path between a first node in a first domain and a second node in a second domain, wherein the RM is on the end-to-end path and comprises:
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a reservation module;
detecting that the inter-domain QoS reservation with at least one QoS characteristic is either needed or needs to be refreshed;
obtaining network state information associated to at least one possible choice of path between the RM and the second domain; and
sending, from the RM and addressed to the second node, a reservation message to trigger establishment of the inter-domain QoS reservation; and
an Option calculation module;
determining at least one choice of path between the RM and the second node respecting the at least one QoS characteristic; and
selecting from the at least one choice of path a selected path to support the inter-domain QoS reservation.
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Specification