Performance evaluation of DTM access nodes
Chih-Chieh Geoff Chang, Arne A. Nilsson · NCSU Libraries Repository (North Carolina State University Libraries) · 1998
This report presents performance results and analysis of a Dynamic synchronous Transfer Mode (DTM) Access Node, a new high-speed network structure based on Time Division Multiplexing (TDM).Several different configuration models have been simulated.The performance analysis consider utilization, delay and blocking.Resource management uses tokens to guarantee conflict free access to time-slots.The DTM access node model includes three different slot management schemes.The first is permanent slot allocation which distributes all slots to all users equally and slots will not be transferred among users.The second is an asymmetrical scheme based on a central slot management that has a central slot pool which dynamically arranges slots upon the request of users.The last is a symmetric scheme based on a distributed slot manager where all users are sharing the slot pool.Traffic generators for the simulation are generating traffic with exponential idle period distribution and Markov Modulated Poisson Process idle period.The active period is assumed to have constant duration and uniform distribution.Results show that under high traffic load, the performance measures delay and blocking probability can increase dramatically.