On Improving Efficiency of CSMA/CA with RSSI-based Control-frame Detection
On Improving Efficiency of CSMA/CA with RSSI-based Control-frame Detection
复制标题
DOI：
--
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Yoshito Umezawa;Takuya Yoshihiro z
中科院分区：
文献类型：
--
作者：
Yoshito Umezawa;Takuya Yoshihiro z
- 自无线通信出现以来，CSMA/CA已经被认为是代表性的媒体接入控制方法。即使是现在，它也在世界上被广泛使用。例如，众所周知，它被IEEE 802.11采用，IEEE 802.11是最流行的通信标准之一。CSMA/CA长期以来一直存在一个显著降低通信性能的问题，称为隐藏终端问题或暴露终端问题。多年来，许多研究人员已经解决了这些问题，并且进行了大量的研究。然而，这些问题的根本解决方案尚未提出。因此，即使是现在，当许多终端聚集时，通信性能仍然显著恶化。在本文中，我们提出了一种控制帧复用技术，通过监测接收信号强度，即，RSSI（接收信号强度指示），即使当节点正在接收来自相邻节点的信号时也是如此，该相邻节点通常是忙碌的。该技术实现了数据的同时通信，解决了终端暴露的问题，大大提高了CSMA/CA的通信效率。
- CSMA/CA has been known as a representative media access control method since the dawn of wireless communication. Even now, it is widely used in the world. For example, it is well known to be adopted by IEEE 802.11, which is one of the most popular communication standards. CSMA/CA has long been known to have a problem that sig-nificantly degrades communication performance, called the hidden-terminal problem or the exposed-terminal problem. These problems have been tackled by many researchers over the years, and there is a huge amount of research. However, a fundamental solution to these problems has not yet been proposed. For this reason, even now, the communication performance is still significantly deteriorating when many terminals gather. In this paper, we propose a control frame multiplexing technique to detect CTS frame and ACK frame with high accuracy without demodulation by monitoring the received signal strength, i.e., RSSI (Received Signal Strength Indication), even when a node is receiving signals from neighboring nodes, which would normally be busy. The proposed technique enables simultaneous data communication, which solves the problem of exposed terminals and greatly improves the communication efficiency in CSMA/CA.