Patent ID: 7912018

Claim:
A Wireless Local Access Network (WLAN) apparatus for controlling transmission rate, taking into account collision, comprising: a WLAN transceiver for sending and receiving data and Request-To-Send (RTS) and Clear-To-Send (CTS) frames under the control of a controller; an RTS/CTS generator for generating the RTS and CTS frames under the control of the controller; and the controller for, when a data transmission fails, increasing a failure number, determining whether an RTS/CTS exchange triggering condition is fulfilled, performing an RTS/CTS exchange scheme if the RTS/CTS exchange triggering condition is fulfilled, comparing the failure number with a failure threshold, if the RTS/CTS exchange triggering condition is not fulfilled or when the CTS frame is received, when the failure number is greater than or equal to the failure threshold, decreasing a transmission rate of the WLAN apparatus, and retransmitting data at the decreased transmission rate.