Multiplex communications – Wide area network – Packet switching
Patent
1991-07-03
1993-06-01
Safourek, Benedict V.
Multiplex communications
Wide area network
Packet switching
370 941, H04J 324, H04L 1242
Patent
active
052166708
ABSTRACT:
A method of discarding unwanted data packets from a communication network of the type having a multitude of nodes connected together to form a circular network. Each node has an address, and each data packet includes a plurality of address subfields to identify addresses of one or more of said nodes. The method comprises the steps of dividing the network into a plurality of segments such that each of the network segments is adjacent at least another of the network segments, assigning each of the network segments one of a plurality of subspace values such that adjacent network segments have different subspace values, and assigning to each address subfield one of the plurality of subspace values. The method further comprises the step of transmitting each data packet over the communication network; and this transmitting step, in turn, includes the steps of (i) at each node, comparing the subspace value of the network segment in which the node is located, with the subspace value in one of the address subfields in the data packet, (ii) if said compared values are not equal, discarding the said one address subfield, and (iii) discarding the data packet after all of the address subfields therein have been discarded. Also disclosed is a method for addressing data packets for routing over a communication network of the type having a multitude of nodes connected together.
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Ofek Yoram
Segall Adrian
International Business Machines - Corporation
Safourek Benedict V.
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