Call control using a layered call model
AssigneeNortel Networks Limited
InventorsStephen Shew, Malcolm Betts, Nigel Davis, Erning Ye
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Abstract
An aspect of the present invention provides a method of controlling a multi-layer transport network. In accordance with the invention a determination is made as to whether a connection supporting a performance requirement of a call can be established within a first layer of the network. If the connection cannot be established, an association is defined between the call and a second call instantiated within a respective server layer of the network. By this means a network call controller in a client layer relies on a call and connection in a server layer instead of a connection in the client layer.
Claims14
A method of establishing a call across a multi-layer transport network, the method comprising steps of:
- instantiating a first call controller within a respective first layer of the network;
- determining whether a respective first connection for the call can be supported by the first layer;
- if the connection can be supported by the first layer, setting up the call using connections in the first layer of the network;
- and
- otherwise:
- instantiating a second call controller in a respective second layer of the network;
- and
- defining an association between the first and second call controllers.
A method of managing a call within a multi-layer transport network, the method comprising steps of:
- determining whether a connection for the call can be supported by a first layer of the network;
- if the connection can be supported by the first layer, setting up an association between a call management object of the call and a respective connection management object in the first layer;
- and
- otherwise:
- defining an association between the call management object and a second call management object instantiated within a respective second layer of the network.
Dependencies are inferred from the claim text.