Herman F Blasbalg

47713917, Sep 13, 1988

Jul 21, 1986

6/887477

Herman Blasbalg - Gaithersburg MD

International Business Machines Corporation - Armonk NY

H04J 302

364514

A distributed control apparatus and method is disclosed to maintain the network stability in a packet switching local area network under changing traffic load conditions, by controlling the size of the packets transmitted by each node. The invention monitors the present information flow rate in the network and computes an average packet length which it then uses to adjust the size of the variable length data field in each message frame. In this manner, network flow control can be achieved without forcing data terminals connected to the nodes of the network to adjust their speed. The invention is applicable to a wide variety of local area network protocols for both ring and bus architectures.

42311136, Oct 28, 1980

Mar 11, 1968

4/713564

Herman L. Blasbalg - Baltimore MD

International Business Machines Corporation - Armonk NY

H04K 102
H04L 902

455 29

Binary information signals which are to be transmitted are combined with a pseudo-random signal wave form such as a pseudo-random sequence of binary bits. Each binary message element, whether a binary "1" or a binary "0", alters successive portions of the pseudo-random binary sequence to thereby create a modified pseudo-random binary bit sequence, successive portions of which represent the binary information. The successive portions of the modified pseudo-random binary sequence are converted to an analog quantity which will be similarly varying in a pseudo-random manner.