In recent years, wireless technologies and application received great attention. The Medium Access Control (MAC) protocol is the main element that determines the efficiency in sharing the limited communication bandwidth of the wireless channel in wireless local area networks (WLANs). IEEE 802.11 introduced the optional RTS/CTS handshaking mechanism to address the hidden terminal problem as well as to reduces the chance of collision in case of higher node density and traffic. RTS Threshold (RT) determines when RTS/CTS mechanism should be used and proved to be an important parameter for performance characteristics in data transmission. We first investigate to find a meaningful threshold value according to the network situation and determine the impact of using or disengaging the RTS/CTS optional mechanism and dynamically adjust the RTS Threshold to maximize data transmission. The results show a significant improvement over existing CSMA/CA and RTS/CTS schemes. Our adaptive scheme performed even better when data rate increases. We verify our proposed scheme both analytically and with extensive network simulation using ns-2.

中文翻译：

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动态RTS阈值调整对IEEE 802.11 MAC协议的影响

近年来，无线技术及其应用受到了广泛的关注。媒体访问控制（MAC）协议是确定在无线局域网（WLAN）中共享无线信道的有限通信带宽的效率的主要元素。IEEE 802.11引入了可选的RTS / CTS握手机制，以解决隐藏终端问题，并在出现更高的节点密度和流量的情况下减少发生冲突的机会。RTS阈值（RT）决定何时使用RTS / CTS机制，并被证明是数据传输性能特征的重要参数。我们首先进行调查，以根据网络情况找到有意义的阈值，并确定使用或取消使用RTS / CTS可选机制的影响，并动态调整RTS阈值以最大化数据传输。结果表明，与现有的CSMA / CA和RTS / CTS方案相比，有了显着的改进。当数据速率增加时，我们的自适应方案表现更好。我们使用ns-2进行分析并通过广泛的网络仿真验证了我们提出的方案。