A method for use in an Institute of Electrical and Electronics Engineers (IEEE) 802.11 station, the method comprising: receiving a control frame, from an IEEE 802.11 access point, wherein the control frame includes a frame control field, a duration field, an RA field indicating the address of one of an intended STAs, a multicast group address or a broadcast address, a TA field indicating the address of the AP, a plurality of per-user information fields for scheduling a plurality of STAs for orthogonal frequency division multiple access (OFDMA) uplink multi-user transmission, and an FCS field, wherein a first of the plurality of per-user information fields indicates information associated with the IEEE 802.11 STA to be used by the IEEE 802.11STA in association with an OFDMA UL transmission, wherein the information associated with the IEEE 802.11 STA comprises an association identifier which may be a partial AID and indicates the intended STA expected to perform a UL transmission, a BW indicating an operating bandwidth of the AP, a short GI indicating whether a short guard interval is applied, a modulation and coding scheme to be used by the IEEE 802.11 STA in association with the OFDMA UL transmission, a number of spatial streams to be used in association with the OFDMA UL transmission, a length indicating the length of a MAC packet passed to the PHY layer, a padding indicating a number of bytes needed to fill the sub-channel(s) assigned, a power control adjustment indicating the uplink power adjustment that the AP requests the STAs to follow, a frequency adjustment indicating the frequency offset adjustment for an UL transmission that the AP request the STAs to follow, a STBC indicating whether space-time block coding is utilized and a coding indicating the rate and type of FEC coding used; determining a random access frequency-time resource based on a value of the AID subfield or partial AID subfield; transmitting an OFDMA LTL data frame using the frequency-time random access resource, as part of an OFDMA UL MU transmission, to the AP in accordance with the received information associated with the IEEE 802.11 STA; and receiving, in response to the OFDMA UL data frame, an acknowledgement frame from the IEEE 802.11 AP. receiving a control frame, from an IEEE 802.11 access point, wherein the control frame includes a frame control field, a duration field, an RA field indicating the address of one of an intended STAs, a multicast group address or a broadcast address, a TA field indicating the address of the AP, a plurality of per-user information fields for scheduling a plurality of STAs for orthogonal frequency division multiple access (OFDMA) uplink multi-user transmission, and an FCS field, wherein a first of the plurality of per-user information fields indicates information associated with the IEEE 802.11 STA to be used by the IEEE 802.11STA in association with an OFDMA UL transmission, wherein the information associated with the IEEE 802.11 STA comprises an association identifier which may be a partial AID and indicates the intended STA expected to perform a UL transmission, a BW indicating an operating bandwidth of the AP, a short GI indicating whether a short guard interval is applied, a modulation and coding scheme to be used by the IEEE 802.11 STA in association with the OFDMA UL transmission, a number of spatial streams to be used in association with the OFDMA UL transmission, a length indicating the length of a MAC packet passed to the PHY layer, a padding indicating a number of bytes needed to fill the sub-channel(s) assigned, a power control adjustment indicating the uplink power adjustment that the AP requests the STAs to follow, a frequency adjustment indicating the frequency offset adjustment for an UL transmission that the AP request the STAs to follow, a STBC indicating whether space-time block coding is utilized and a coding indicating the rate and type of FEC coding used; determining a random access frequency-time resource based on a value of the AID subfield or partial AID subfield; transmitting an OFDMA LTL data frame using the frequency-time random access resource, as part of an OFDMA UL MU transmission, to the AP in accordance with the received information associated with the IEEE 802.11 STA; and receiving, in response to the OFDMA UL data frame, an acknowledgement frame from the IEEE 802.11 AP.