Method to Force Statistical Multiplexing in ASTN Controlled Networks
Original Publication Date: 2003-Aug-25
Included in the Prior Art Database: 2003-Aug-25
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The method described in this invention applies to a transport network where a service provider is providing a connection service to the service-user (client) on demand of the client. The client signals a connection request to the control of the transport network and the service provider then instantaneously provides this connection to the client. The new method enables the service provider to improve the utilization of the network resources by forcing the clients connected to the network to share the resources. The state-of-the-art method to offer dynamic bandwidth services today is based on a control panel approach where connections can be dynamically created and deleted. This is at the moment standardized by different standardization bodies, namely the "International Telecommunications Union - Transport" (ITU-T), the "Optical Internetworking Forum" (OIF) and the "Internet Engineering Task Force" (IETF). In this approach, signaling protocols (e.g. GMPLS, Generalized Multi-Protocol Label Switching) are used to set up or tear down a connection in the transport network. This is shown in figure 1. The entities of the control plane involved in the signaling are denoted with small letters, the corresponding transport hardware devices of the network elements (NE) are denoted with capital letters. The setup and the release of the connection are both achieved using both-way signaling. The main advantage of this ASTN (Automatic Switched Transport Network) is that the delivery can be guaranteed once the setup was successful. Also, connections with long holding times can be set up on the fly. However for an economical application of ASTN, the holding times are still too high and the number of clients in the start-up phase is too small.