Performance Evaluation of Parallel and Series Communication Network with Dynamic Bandwidth Allocation

In this paper a parallel and series communication network model with dynamic bandwidth allocation is developed and analyzed. In order to reduce congestion in buffer and to improve voice quality several congestion control methods like bit dropping,selective packet discarding, flow control etc., are developed and successfully implemented. to have an efficient utilization we propose dynamic allocation of bandwidth i.e. the transmission rate of the data/voice packet dependent on the content of the buffer just before it get transmitted. The end to-end performance of the model is measured by approximating the arrival and service processes of the packets follow poisson process. The transient analysis of the communication network shows that dynamic allocation has a significant effect in reducing mean delays and improving throughput of the transmitter. Graphs illustrate performance of the network model for different parameters.