Ring Utilization Measurement Device
Original Publication Date: 1987-May-01
Included in the Prior Art Database: 2005-Feb-01
The article provides an apparatus and technique for measuring the utilization of a token ring LAN. Ring utilization is the fraction of time the ring is being used. It is calculated from the following expression: Ring utilization (RU) = 1-ring latency/available average token rate The technique expresses latency as the time between two consecutive free tokens and average available token rate as the time between free tokens. Thus, the apparatus simply measures the respective time and uses the result to calculate ring utilization. The figure shows a block diagram of the ring utilization measurement apparatus. It is connected to the token ring via a modified front end chip (MFEC) 1. The modified front end chip is a passive inductive connection to the token ring via a toroid through which the ring wire media passes.