Other

Corvil Limited

Cplane Inc.

Ian Malcolm Leslie

Alexander Latour-Henner

Nils Bjoerkman

Simon Andrew Crosby

John Trevor Lewis

Jacobus Erasmus Van Der Merwe

Christopher John Adams

Raymond Russell

Fergal Toomey

Raymond Philip Russell

Fergal William Toomey

Henry Pitura

David L Tennenhouse

John W Burren

A data network in which at least one switch is provided with the facility for estimating current network demands using a polygonal approximation to scaled cumulant generating function. The approximation is iteratively refined in accordance with sampled data passing through the switch. The switch estimates the demand associated with a new data processing request as it is received by the switch and decides whether to accept the request based on available resources.

Data networks

Switching system

Digital data networks (such as the ISDN) which provide transmission between selected locations may use time multiplexed slots with predetermined maximum bit-rates. However local area networks (LANs) transmit packets, containing data bits, at a rate which varies frequently and often corresponds to a higher bit-rate than can be handled by individual slots. In the present invention packets arriving at an input port are allocated to a number of queues each for a respective destination, and each queue is allocated a group of slots on a digital data network. The slot contents are assembled into frames in a buffer store and transmitted to the digital network. On reception, the contents of several frames of incoming multiplexed slots are held in a frame store and then assembled into packets in a number of buffers making allowance for arrival in a different slot order and different frames. Marker signals are sent periodically in each slot and these signals are used to specify the order in which the slots were transmitted and to signal when the number of slots in each group is to change to allow for variations in packet traffic.

Variable data rate channel for digital network

Growing community of inventors

Cambridge, United Kingdom

Ian Malcolm Leslie