Channel bonding in IEEE 802.11 wireless LANs is a technique whereby adjacent 20MHz channels are ‘bonded’ to create a wider bandwidth channel that supports higher data rate transmissions. Although rate improvements due to channel bonding has been shown in sparse wireless LAN environments, its effectiveness in dense scenarios requires further exploration due to increased sensitivity to interference from overlapping co-channel basic service sets. With the newly finalized 802.11ax standard supporting enhanced spatial reuse feature, its impact on the expected gains from channel bonding needs careful analysis. In this work, we propose a new analytical framework that accurately models the performance of channel bonding as a function of both PHY and MAC parameters for a dense network scenario. A new channel bonding algorithm that is robust to overlapped co-channel interference is described, i.e. it preserves channel bonding gains by intelligently choosing the channel bonding bandwidth based on network conditions and parameters that are readily available to all stations, critically the modulation scheme chosen for packet transmission. The predicted gains of the proposed algorithm are verified via comprehensive simulations conducted with the open source network simulator ns-3.

中文翻译：

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密集IEEE 802.11 WLAN中的信道绑定分析和优化

IEEE 802.11无线局域网中的信道绑定是一种技术 邻近的“绑定” 20MHz信道以创建支持更高数据速率传输的更宽带宽信道。尽管已显示出由于通道绑定导致的速率提高，疏 无线局域网环境，其有效性在 稠密由于对重叠的同信道基本服务集的干扰更加敏感，因此需要进一步探索这些场景。有了新近完成的802.11ax标准支持增强空间复用功能，它对通道绑定预期收益的影响需要仔细分析。在这项工作中，我们提出了一个新的分析框架，该模型可以为密集网络场景中的PHY和MAC参数两者精确地建模信道绑定的性能。描述了一种对重叠的同频干扰具有鲁棒性的新的信道绑定算法，即，它通过根据网络条件和所有站点都可用的参数智能地选择信道绑定带宽来保留信道绑定增益。调制方案选择用于数据包传输。通过使用开源网络模拟器ns-3进行的全面模拟，验证了所提出算法的预测增益。