| Summary: | 碩士 === 國立中山大學 === 電機工程研究所 === 85 ===
In this thesis, we develop a dynamic buffer allocation scheme for ATM networks. The most significant feature of this scheme is the dynamic change of allocated buffer sizes to improve the QoS requirements for various types of multimedia traffic.
Traditional buffer management schemes, include complete sharing, partial sharing, dedicated allocation, set-up threshold and priority. In this thesis, we first classify the traffic into several classes and give these classesdifferent priority levels. Then we allocate buffer space for different classes according to partial sharing. The allocated buffer size can be dynamically adjusted based on the cell loss ratio. The algorithm is divided into two phases. The first phase is to evaluate how much buffer size should be allocated to each priority. The second phase is to dynamically modulate the buffer size among different classes based on priority.
We evaluate the performance of the dynamic buffer allocation scheme by computer simulation and simple probability theory. In addition, we compare the dynamic allocation scheme with fixed buffer management and NTCD/MB schemes. We found out that this dynamic allocation scheme can improve end-to-end queueing delay and cell loss ratio. The results also shown that the cell loss ratio and the queueing delay may be affected by the allocated buffer size and pre-assigned background traffic.
|
|---|
