Architecture modeling and simulation for supporting multimedia services in broadband wireless networks

In this paper, we propose and evaluate two reference models for supporting wireless video broadcasting services based on ATM over LMDS in metropolitan area wireless access networks. Our proposed reference models, namely end-to-end ATM model and headend/server-to-hub ATM model, are characterized. The end-to-end ATM model supports transfer of the ATM cell between headend and set-top box located in the end of networks for the wireless video services. The headend/server-to-hub ATM model transfers the ATM cell between headend/server and hub, and transmits the LMDS frame in the MPEG-TS over LMDS wireless access network. The performance evaluation of the proposed models is performed via analysis and simulation. The results evaluate delay and jitter of two proposed models. Especially, headend/server-to-hub ATM model has better performance than end-to-end ATM model for wireless video services because the end-to-end ATM model additionally needs more delay and jitter than headend/server-to-hub ATM model to convert the ATM cell to the LMDS frame.