Call control using a layered call model
AssigneeCiena Corporation
InventorsStephen Shew, Malcolm Betts, Nigel Davis, Erning Ye
Life of this patent
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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 controlling a multi-layer transport network, the method comprising:
- determining whether a connection supporting a performance requirement of a call can be established within a first layer of the network;
- and
- if the connection cannot be established within the first layer, defining an association between the call and a second call instantiated within a second layer of the network.
A system for establishing a call connection for a call, the system comprising:
- a first call controller at a first layer, the first call controller determining whether a connection supporting a performance requirement of a call can be established within a first layer of the network, and if the connection cannot be established within the first layer, providing a call request message to a second layer:
- a second call controller at the second layer, the second call controller determining if a performance requirement of the call can be met at the second layer, and if so, establishing a second call at the second layer:
- and
- at least one of said first and second call controllers defining an association between the call and the second call.
Dependencies are inferred from the claim text.