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Capacity Analysis of Opportunistic Channel Bonding over Multi-channel WLANs under Unsaturated Traffic
IEEE Transactions on Communications ( IF 8.3 ) Pub Date : 2020-03-01 , DOI: 10.1109/tcomm.2019.2960362
Mengqi Han , Sami Khairy , Lin X. Cai , Yu Cheng , Fen Hou

In this paper, we analytically study the performance of opportunistic multi-channel bonding protocol supporting delay-sensitive multimedia services. We consider a multi-channel system shared by IEEE 802.11ac users who can transmit over multiple channels and legacy users who can only transmit over one single channel. By analyzing the channel bonding behavior of IEEE 802.11ac users and the random access of legacy users, bonding probability and successful bonding probability of IEEE 802.11ac users can be derived. Furthermore, the access delays of both legacy and 802.11ac users are analyzed. According to the analytical results, the network capacity which quantifies the maximum number of multimedia flows that can be supported with guaranteed delay is then presented. Additionally, the impacts of different parameters such as traffic data rate on the network capacity are investigated. Our analytical results show that channel bonding is favorable when the secondary channels are underutilized. But channel bonding should be disabled when there are already intense contentions from legacy users. Based on the analytical results, we propose a heuristic bonding policy which can provide important guidelines to control the number of flows to satisfy the QoS requirement and achieve the maximum network capacity. Extensive simulations have been conducted to validate the analytical results.

中文翻译:

不饱和流量下多信道WLAN上机会信道绑定的容量分析

在本文中,我们分析研究了支持延迟敏感多媒体服务的机会多通道绑定协议的性能。我们考虑由可以通过多个通道进行传输的 IEEE 802.11ac 用户和只能通过一个单一通道进行传输的传统用户共享的多通道系统。通过分析IEEE 802.11ac用户的信道绑定行为和遗留用户的随机接入,可以推导出IEEE 802.11ac用户的绑定概率和绑定成功概率。此外,还分析了传统用户和 802.11ac 用户的访问延迟。根据分析结果,然后给出了网络容量,该网络容量量化了在保证延迟的情况下可以支持的最大多媒体流数。此外,研究了不同参数(如流量数据速率)对网络容量的影响。我们的分析结果表明,当次通道未得到充分利用时,通道绑定是有利的。但是,当旧用户已经存在激烈争用时,应该禁用通道绑定。基于分析结果,我们提出了一种启发式绑定策略,该策略可以为控制流数量以满足 QoS 要求并实现最大网络容量提供重要指导。已经进行了广泛的模拟以验证分析结果。基于分析结果,我们提出了一种启发式绑定策略,该策略可以为控制流数量以满足 QoS 要求并实现最大网络容量提供重要指导。已经进行了广泛的模拟以验证分析结果。基于分析结果,我们提出了一种启发式绑定策略,该策略可以为控制流数量以满足 QoS 要求并实现最大网络容量提供重要指导。已经进行了广泛的模拟以验证分析结果。
更新日期:2020-03-01
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