A method of congestion management within a switch or network of connected switches is provided, wherein the or each of the switches has a plurality of ingress ports and a plurality of egress ports. Adaptive knowledge lifecycle management provides a means for beneficially adapting knowledge assets and their collective structures over time. The detecting unit is used for detecting an identifying chip having an identifying data. The virtual information card can then be used to generate a security token to satisfy the security policy. When the subscriber communication machine cannot keep synchronization with a transmission cycle in a predetermined transmission system such as TCM in steady communication, it is possible to promptly resume the communication without the necessity for initializing all over again. The video sprite frames are selected by comparing a last-selected frame to the other video sprite frames, and selecting a video sprite frame that is identified in the comparison as corresponding to an acceptable transition from the last-selected frame.