In this thesis, the performance of an integrated voice/data packet communication network with window flow control is investigated. The network is modeled by tandem links with a single closed chain and analyzed.
The data controlled by window flow control is analyzed with a heuristic method based on the mean value analysis approach and the concept of the effective capacity. For analysis of the network where the acknowledgement delay cannot be neglected and the priority scheduling scheme is used, we use a modified mean value analysis method. Also for analysis of the network having other messages such as voice and external data, we use the M/G/1 queueing theory with different priority classes. Using these methods, we obtain iteratively various network parameter values, such as throughput, mean queue length and delay time. In addition, we investigate the network performances for different window sizes, thereby obtaining the optimal window size that maximizes the network efficiency for different traffic intensities.
Finally, the characteristics of voice and data traffics in packet computer network are investigated.
본 논문에서는 window flow control을 가진 음성과 데이타가 집적된 통신망의 성능에 관해서 분석하였다. 기존의 mean value analysis 와 effective capacity 를 이용해서 음성과 data 들의 성능 (throughput, delay time and queue length)을 추정하였다. 특히 ACK 신호의 지연시간이 있거나 여러종류의 priority 를 가진 data들이 있는 network 에 맞는 algorithm 을 제시하였다. 그리고 여러 traffic intensity 에 대해서 network 의 효율을 최대로 할 수 있는 최적 window size 를 관찰하였다.
마지막으로 packet 통신망에서 음성과 data traffic 의 특성을 조사해 보았다.
