British Telecommunications Public Limited Company

British Telecommunications Corporation

Hui Min J Tay

Robert J Briscoe

Philip L Eardley

Gabriele Corliano

Benjamin Bappu

Wei C See

The present invention provides a method and system wherein congestion information is taken from a lower level in the protocol stack and used for congestion marking in a higher layer. In particular, the method and system of the invention from a first aspect provide for congestion information in the lower layer to be generated downstream at a congested node, and to be fed back upstream to a source node. The source node then passes the congestion information, or information derived therefrom, up to the corresponding network element responsible for higher layer functions in the protocol stack, where higher level congestion marking can then be performed in dependence on the received lower level congestion information. Thus, congestion information from the lower layer which can typically be generated earlier before significant congestion occurs can be used in higher layer congestion control functions. Preferably the lower layer is the data link layer, and the higher layer is the network layer.

Method and system for congestion marking

Authenticated propagation of adverts to multiple mobile recipient devices, each having both wireless and mobile telephony capability, employs message generation platforms each having a content creation engine, a metadata inserter and a signature generator, for the wireless broadcast of the generated messages. A client application on each recipient device controls viewing of the message, with authentication being provided through mobile telephony communication with a trusted authority which is in turn in secure communication with the message generation platform to hold signature information. According to an incentive policy, a device may wirelessly re-broadcast any message.

Propagation of messages

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Ipswich, United Kingdom

Hui Min J Tay