Process / pipelineMedium Access Control
载波侦听多路访问/冲突避免 (CSMA/CA)
CSMA/CA 是一种用于无线介质访问控制的随机访问协议，旨在允许多个设备共享无线信道，同时最大限度地减少冲突。该协议由 Phil Karn 于 1990 年提出，是 WiFi (IEEE 802.11) 的基础，现已成为免许可频谱接入的事实标准。CSMA/CA 结合了载波侦听（发送前侦听）和冲突避免（RTS/CTS 握手）来提高信道效率和公平性，避免了纯随机访问 (Aloha) 的效率损失。
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来源
- Karn, P. (1990). MACA—a new channel access method for packet radio. In Proceedings of the ARRL/CRRL Amateur Radio 9th Computer Networking Conference, 134-140. link ↗
- IEEE 802.11 Working Group. (2020). IEEE Standard for Information Technology—Part 11: Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications. IEEE. link ↗
如何引用本页
ScholarGate. (2026, June 3). Carrier Sense Multiple Access with Collision Avoidance. ScholarGate. https://scholargate.app/zh/telecommunications/csma-ca
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