Distributed ATM switching topologies in tree-structured networks

摘要

HFC networks, today mostly used to broadcast traditional cable TV programs, will possibly play a major role in future broadband access network development. The structure of HFC networks is briefly described and bottlenecks in case of high load are identified. To improve performance and eliminate the bottleneck, the approach presented in this paper suggests the replacement of passive network elements like fiber nodes and signal amplifiers by ATM switches. This approach has been evaluated with respect to various network topologies and user scenarios. A simulation model used for the evaluation is presented within this paper and simulation results are discussed.