Abstract
In the majority of IEEE 802.11 series wireless networks, the quality of service (QoS) requirements are related to the queueing behavior of buffers in mobile stations, e.g., the buffer stability, overflow probability and packet delay, etc. Thus, it is important to accurately evaluate the performance of such networks in non-saturation environments. In this paper, we analyze the IEEE 802.11e enhanced distributed channel access (EDCA) wireless network under finite load. We develop an analysis model by a 3-dimensional Markov chain and derive its steady state distribution using the spectral method. We present a variety of performance measures including the buffer stability, the collision probability, the non-saturation throughput and the probability generating function of head-of-line delay (HoL-delay). For IEEE 802.11e EDCA wireless networks, these results are very useful in optimizing the network architecture and system parameters under the given QoS requirements.
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