- Normalized throughput
S = R/C where
R = Average error free b/s passing through a reference point in the
network
S = % time the network is carrying error free packets
- Channel (or link) utilization is the % time the channel (or link is
busy).
- Channel Efficiency is the % time the channel is carrying user
information.
- Let
- D = # user data bits/packet
- H = # network overhead bits/packet
- then
- Channel efficiency = S(D/(D+H))
- Channel Capacity, Smax, is the maximum obtainable throughput over the
entire range of input traffic intensities, i.e., offered load.
- Blocking Probability
- + Packet
- + Call
- Reliability
Network Performance Perspectives
- User-Oriented
- + Minimum delay
- + Maximum throughput
- + Highly reliable
- + Very flexible
- + Secure
- Network Manager
- + Maximum throughput for all users
- + Effective congestion control
- + Easy management
- + Highly reliable
- Network Designer/developer
- + Simple design
- + Robust
- + Scales
- + Efficient use of resources, CPU, links and memory