Abstract: The present invention is to provide an Ethernet switch fabric controller requiring output port buffer unit of less capacity while still working with an Ethernet switch to smoothly forward the packet from each input port of the Ethernet switch to an output port corresponding to the packet header at the input port. It is featured by the use of proper number of temporary buffer units each of proper length, and output port buffer unit of proper length.

Abstract: A method and system are disclosed for constructing a power spectrum based connection admission control table and using such a table in a communications network, such as an ATM network. Power spectrum parameters, such as the power spectrum DC component .gamma., half power bandwidth B.sub.w and average power .PSI..sub.w are transformed to .gamma., an equivalent half power bandwidth B.sub.e and an equivalent average power .PSI..sub.e, where B.sub.e is a predetermined constant. Since B.sub.e is constant, the transformation reduces the memory requirements for constructing a connection admission control table.

Abstract: A system and process are provided for controlling congestion at a node of an asynchronous transfer mode (ATM) communications network. The process and system utilize fuzzy logic in determining whether or not to "admit," i.e., allocate a virtual channel (VC) for, new communications (or calls) to the node. Fuzzy logic is also use to control the rate cells are transmitted to the node for communications already "admitted," i.e., for which a VC has already been allocated. The fuzzy logic rules for bandwidth estimation in admission control may be developed from an "equivalent capacity" model. The fuzzy logic rules for adjusting cell transmission rates may be developed from a "two-threshold" congestion control model.

Abstract: The present invention is related to a method adapted to be used in hashing algorithm for reducing conflict probability which comprises the steps of receiving a first physical address of a frame; generating a hashing address corresponding to the first physical address; comparing a second physical address corresponding to the hashing address with the first physical address to determine if the first and the second physical addresses match with each other; completing a packet calling process when the first and the second physical addresses match with each other, but going back to the comparing process when the first and the second physical addresses do not match with each other, to determine whether there is another second physical address corresponding to the hashing address and matching with the first physical address; and ending the packet calling process when a number of times that the comparing process is proceeded is greater than a reference value.