This disclosure describes systems, methods, and devices related to pre-association exchange. A device may receive a physical layer (PHY) based extended long range (ELR) request from a station device (STA) within a transmission opportunity (TxOP). The device may allocate a unique Unassociated ID (UID) to the STA within the same TxOP, the UID being distinct among active unassociated devices. The device may indicate to the STA to use the UID in subsequent communications until association or a predefined timeout occurs. The device may cause to send a trigger frame to the STA using the UID for scheduled uplink transmissions.