Ciena Corporation

Nortel Networks Corporation

Telefonaktiebolaget Lm Ericsson (publ)

Ciena Luxembourg S.a.r.l.

Erning E Ye

Stephen Daniel Shew

Malcolm Betts

Nigel Robert Davis

Indranil Bob Tapadar

Stephen Shew

Stephen D Shew

Nigel Davis

Call Control entities in a network communicate between themselves by amending call processing messages to include encrypted network information. As such, a call may be established whose path through the network is dependent on the paths of other calls. Information of a scope larger than a Call Controller normally possesses can, as a result of this communication, be made available to Call Controllers for constraining call establishment. This information could relate to other calls and connections associated with those other calls. The information may also relate to gateways in and to adjacent networks and the Call Controllers in the adjacent networks that are related to the current Call Controller.

Communication between call controllers by amending call processing messages

A device for use in a communication network having an access channel is provided. The device includes a memory that stores access class ('AC') barring parameters. The AC barring parameters establish rules to determine whether to transmit an access message on the access channel. The device includes a processor that determines whether the access channel is in an overload condition and determines of overload levels in response to the access channel being in an overload condition. A value of at least one AC barring parameter is defined based on the determined one of the plurality of overload levels. The device includes a transmitter that transmits an update message. The update message includes the defined value of the AC barring parameter corresponding to the determined one of the plurality of overload levels.

Adaptive access channel overload control

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.

Call control using a layered call model

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Kanata, Canada

Erning E Ye