Collision-Aware Intel Rate Adaptation Algorithm for IEEE 802.11 WLANs

Collision-Aware-Intel (CA-Intel) which is a modified version of the widely used Rate Adaptation Algorithm (RAA), Iwl-Mvm-Rs, is proposed to enhance performance by incorporating collision awareness. CA-Intel builds upon Iwl-Mvm-Rs by introducing an error condition estimation mechanism and an adaptive Request-To-Send/Clear-To-Send (RTS/CTS) mechanism. The presence of collisions is detected by analyzing the difference in Frame Error Rates (FERs) between transmissions protected by RTS/CTS and those that are not. Then it will adaptively enable the RTS/CTS mechanism based on current error conditions to avoid collisions. CA-Intel has been implemented in the ns-3 simulator, demonstrating that it effectively reduces FER and improves throughput.