In this paper, 2 architectures are proposed for a low Earth orbit mega‐constellation realising a satellite‐enabled LTE system, in which the on‐ground LTE entity is either an eNB (Sat‐eNB) or a relay node (Sat‐RN). However, the large delays and Doppler shifts over the satellite channel pose severe technical challenges to traditional terrestrial systems, as long‐term. The integration of satellite and terrestrial networks is a promising solution for extending broadband coverage to areas not connected to a terrestrial infrastructure, as also demonstrated by recent commercial and standardisation endeavours. Simulation results proved the accuracy of our model. To validate the accuracy of our proposed model, we compared its mathematical simulation results with those obtained using the 802.11n DCF in the network simulator (NS-2) and with other analytical models investigating the performance of 802.11n DCF. The contribution of this work was the analysis of the DCF performance under error-prone channels considering both 802.11n MAC schemes and the anomalous slot in the backoff process. Further, it took anomalous slots and the freezing of backoff counter into account. Our proposed model considered packet loss either from collisions or channel errors. networks when frame aggregation and block acknowledgements (Block-ACK) schemes are adopted. This article provides an accurate two dimensional Markov chain model to investigate the throughput performance of IEEE 802.11n.
We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.According to the amendment 5 of the IEEE 802.11 standard, 802.11n still uses the distributed coordination function (DCF) access method as mandatory function in access points and wireless stations (essentially to assure compatibility with previous 802.11 versions). Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc.
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