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Effect of uplink multiple access scheme on traffic reshaping for a broadband GEO satellite network

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4 Author(s)
Yi Qian ; Nortel Network, Richardson, TX, USA ; R. Hu ; H. Abu-Amara ; P. Maveddat

We investigate the impact of uplink multiple access schemes on traffic reshaping for a meshed broadband VSAT network over geostationary (GEO) satellite. The system includes a bent-pipe satellite with a number of broadband VSATs carrying multimedia traffic. An integrated CAC and BOD algorithm is used for the uplink M-TDMA access. An OPNET(TM) simulator is developed to investigate the affects of the CAC/BOD algorithm on the different applications in the satellite networks. Source application traffic is modeled using one of the following ATM transfer capabilities; CBR, rt-VBR, nrt-VBR, ABR, and UBR. We perform detailed traffic studies to compare the source traffic with the traffic out of the uplink multiple access, We show by simulation and analysis that all traffic contracts for the CBR, rt-VBR, and nrt-VBR source traffic are violated after uplink access. The results provide guidelines on the design of a corrective traffic reshaping function that counter-acts the traffic reshaping caused by the CAC/BOD uplink multiple access of the satellite networks

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Wireless Communications and Networking Conference, 1999. WCNC. 1999 IEEE

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