Methods and WTRUs of providing range extension for WLAN

A station (STA), comprising:

• a receiver configured to receive low rate range extension (LRRE) information from an access point (AP);
• a transmitter;
• and
• a processer configured to determine whether a first condition is satisfied by the STA wherein on a condition that the first condition is satisfied:
• the transmitter is configured to send a mode change request to the AP to change an operation mode to a LRRE hybrid automatic repeat request (HARQ) mode;
• the receiver is further configured to receive a response to the mode change request from the AP;
• and
• the STA is configured to communicate with the AP using a plurality of physical layer convergence procedure (PLCP) protocol data units (PPDUs), wherein each of the plurality of PPDUs comprises at least one field enabling transmissions between the STA and the AP under the first condition and a LRRE HARQ mode indication.