Telefonaktiebolaget Lm Ericsson (publ)

Ola Engstrom

Staffan Andersson

Mikael Agnevik

Lars-G&ouml;ran Peterssen

Anders Knuutinen

AAL2 (ATM Adaptation Layer ) paths are dynamically established and/or released in an ATM (Asynchronous Transfer Mode) network/system. For purposes of example, during network operation a determination(s) may be made as to whether AAL2 mux (i.e., multiplexor(s) and/or demultiplexor(s)) resources are lacking and/or excessive relating to a particular AAL2 signaling relation(s). When AAL2 mux resources are determined as lacking for the AAL2 signaling relation, then at least one AAL2 mux is added to the relation. However, when AAL2 mux resources are determined as excessive for the AAL2 signaling relation, then at least one AAL2 mux is removed or dropped from the relation. AAL2 paths may be selectively and dynamically added and/or dropped from an AAL2 signaling relation in response to the above determinations. In such a manner, ATM resources can be preserved and not wasted thereby resulting in a more efficient ATM AAL2 system/network.

Dynamic AAL2 path configuration in ATM system

An internal routing tag ( ) is appended to a payload of a received ATM cell upon ingress of the ATM cell into a multi-stage ATM node ( ). The routing tag comprises routing information for routing the payload of the received ATM cell through plural stages ( ) of the multi-stage node. Preferably the routing information comprises a list of destination addresses, e.g., utopia address of physical units ( ) in the multi-stage ATM node. Use of the internal routing tag streamlines connection setup, reduces the number of internal control paths required, and obviates VPI/VCI conversion at the plural stages of the multi-stage node.

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Bandhagen, Sweden

Ola Engstrom