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We model a nonsaturated IEEE 802.11e EDCA network for a small buffer size. Our model is much simpler and more accurate than others that have appeared in the literature. The model is simple because 1) we invoke the Kumar renewal-reward approach for the saturated collision probability rather than the Bianchi Markov-chain approach, as in previous work, and 2) we approximate the nonsaturated attempt rate...
We define and evaluate the downlink flow-level capacity of a fractionally loaded OFDMA network utilizing round robin (RR) or proportional fair (PF) scheduling. The flow-level capacity is the maximum traffic intensity that can be supported by a sector while satisfying a minimum flow throughput requirement for bursty, elastic traffic. We obtain a simple, insightful capacity expression for RR scheduling;...
We consider the sector capacity of an OFDMA data network, defined in terms of the number of users that can be supported while satisfying a minimum flow throughput requirement. A closed queueing network model to evaluate flow throughputs is extended to the case of reuse partitioning. The model is used to evaluate the sector capacity of reuse 1, fractional frequency reuse (FFR) and soft frequency reuse...
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