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X. CONCLUSION In this paper we have presented a performance analysis of the Wireless Integrated Multiple Access (WIMA) protocols. These schemes, which combine the pure-reservation NIFFL are especially well suited to satellite networks and to highspeed wireless terrestrial networks in which the round-trip propagation delay is greater than the data-packet duration, although they are also appropriate for environments in which propagation delay is less than a packet duration. The techniques we have developed to exploit the structural properties of the two-dimensional first-order Markov chain that characterizes this scheme have been shown to permit the efficient and accurate evaluation of data-packet delay and voice-call blocking probabiliy. Performance results illustrate the dependence of performance on system parameters, and demonstrate the improved performance that can be achieved through the use of the movable-boundary version as compared to the fixed-boundary version. Trade-offs between data-packet delay and voice-call blocking probability show the importance of the parameter Vmax, the threshold used to control access of voice calls to the system. |
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lclclclc88: ½ð±Ò+20, ·ÒëEPI+1 2012-04-11 16:30:41
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