The convergence of fibre and wireless technologies realised the fibre-wireless (FiWi) networks. Despite huge capacity offered by fibre, the user experiences a network bottleneck caused by the wireless side. This study investigates wireless local area network (WLAN), the wireless side of the FiWi networks with a gigabits passive optical network (GPON) as the backhaul. The work aims to improve WLAN performance by utilising information gained from GPON. The proposed technique enables all contending stations in multiple access points (APs) WLAN to achieve a desired downlink-to-uplink transmission ratio, k while maintaining maximum throughput. Optimum contention window (CW) sizes for the APs and associate wireless users (WUs) are derived by incorporating the principles of idle sense (IS) and asymmetric AP. However, fairness problem between WUs occurred when they contend the channel with different CW sizes. Hence, this study simplifies the IS scheme to increase fairness between WUs. Furthermore, AP self-adapting and WU adjusting algorithms are proposed to assist the network to achieve the desired k , while maintaining the throughput fairness amongst basis service sets. The robustness of the proposed scheme is demonstrated under various conditions: achieved target k with nearly perfect fairness and gained near-to-maximum throughput within 96% of the theoretical optimum.

中文翻译：

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光纤无线网络中具有传输优先级的空闲感知

光纤和无线技术的融合实现了光纤无线（FiWi）网络。尽管光纤提供了巨大的容量，但用户仍会遇到由无线端引起的网络瓶颈。这项研究调查了无线局域网（WLAN），即以千兆位无源光网络（GPON）作为回程的FiWi网络的无线侧。这项工作旨在通过利用从GPON获得的信息来提高WLAN性能。所提出的技术使得在多个接入点（AP）WLAN中的所有竞争站点都能在保持最大吞吐量的同时实现所需的下行链路与上行链路的传输比k。通过合并空闲感知（IS）和非对称AP的原理，可以得出AP和关联无线用户（WU）的最佳竞争窗口（CW）大小。然而，当WU竞争具有不同CW大小的信道时，会发生公平问题。因此，本研究简化了IS方案以增加WU之间的公平性。此外，提出了AP自适应和WU调整算法，以帮助网络实现所需的目标。ķ ，同时保持基本服务集之间的吞吐量公平性。在各种条件下证明了该方案的鲁棒性：已实现目标ķ 具有接近完美的公平性，并在理论最佳值的96％之内获得了接近最大的吞吐量。