Controlled csma packet switching system

Details Controlled csma packet switching system Controlled csma packet switching system

H - Electricity

04

L

344/28

H04L 12/56 (2006.01)

Patent

CA 1319409

PHN 12.299 Abstract: "Controlled CSMA packet switching system." A controlled CSMA packet switching system of a non- persistent carrier type in which in the event of a channel being sensed busy, a new sensing point is scheduled at random in a dynamically determined time interval TSn where TSn = Image where TSU is the scheduling time interval that maximises the expected throughput when all the stations compete for the channel access, TS1 is the scheduling time interval that maximises the expected throughput when two stations compete for the channel access, TSn-1 is a scheduling time interval determined in a preceding (n-1)th observation interval, Gn-1 is the average offered load in the (n-1)th observation interval, and Go is a nominal average offered load. An estimation of the average offered load Gn-1 is derived from an estimation of the average idle period length in the (n-1) observation interval. Three strategies for obtaining such an estimation when a station participates to at least one transmission in the observation interval are disclosed.

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