Broadband satcom system for multimedia services
Jun Steed Huang, Tho-Le Ngoc, Jeremiah F. Hayes · 2002
A broadband satellite communications system using an on-board packet switch to support multimedia services is proposed. A dynamic resource allocation strategy based on a tunable leaky bucket scheme is suggested to achieve an efficient utility of system capacity and an acceptable ATM cell loss probability in the on-board down-link queue. An analytic model based on matrix analytic techniques to evaluate the system performance is developed. Heterogeneous multimedia traffic sources are modeled as Markov modulated Poisson processes with diverse structures and parameters. Numerical results show that the dynamic resource allocation strategy in conjunction with the on-board packet switch can provide a large statistical multiplexing gain. Effects of the token rates and bucket depths on the ATM cell delay and cell loss probability in both on-ground and on-board buffers are presented.