OFDMA mapping for clients with various bandwidths

1. A method for communicating a signaling field in a wireless communications system, the method comprising:

transmitting, by a wireless device, a frame through a medium using a 160 MHz bandwidth, wherein transmitting the frame includes:

transmitting a first portion of a signaling field in the frame using a first channel having a 20 MHz bandwidth,

transmitting a second portion of the signaling field in the frame using a second channel having a 20 MHz bandwidth,

transmitting a third portion of the signaling field in the frame using a third channel having a 20 MHz bandwidth, and

transmitting a fourth portion of the signaling field in the frame using a fourth channel having a 20 MHz bandwidth,

wherein the second channel is different from the first channel, the third channel is different from the first and second channels, and the fourth channel is different from the first, second, and third channels, and

wherein contents of the first portion are different from contents of the second portion, contents of the third portion are the same as the contents of the first portion, and contents of the fourth portion are the same as the contents of the second portion.

2. The method of claim 1 , wherein the signaling field is one of (1) a High Efficiency (HE) Signal-B (SIG-B) field and (2) one or more payload fields of a downlink frame that triggers immediate subsequent uplink communications.

3. The method of claim 1 , further including:

determining, by the wireless device, a plurality of assignments of resources of a mapped frame to respective stations of a plurality of stations;

determining, by the wireless device, respective operational bandwidths of the plurality of stations; and

incorporating, by the wireless device, the assignments into the contents of either the first or second portion according to the operational bandwidths of the respective stations.

4. The method of claim 3 , wherein incorporating the assignments into the contents of either the first or second portions according to the operational bandwidths of the respective stations includes:

incorporating an assignment into the first portion when a respective station has an operational bandwidth equal to a bandwidth of the first channel; and

incorporating the assignment into the second portion when the respective station has the operational bandwidth equal to a sum of the bandwidth of the first channel and a bandwidth of the second channel.

5. The method of claim 4 , further including:

incorporating the assignment into a third portion of the signaling field when the respective station has the operational bandwidth equal to or greater than a sum of the bandwidth of the first channel, the bandwidth of the second channel, and a bandwidth of a third channel; and

transmitting the third portion of the signaling field using the third channel,

wherein the third channel includes a third frequency different from the first and second frequencies.

6. The method of claim 4 , wherein incorporating the assignments into the contents of either the first or second portions according to the operational bandwidths of the respective stations further includes incorporating the assignment into the first and second portions when the respective station has the operational bandwidth equal to the sum of the bandwidth of the first channel and the bandwidth of the second channel.

7. The method of claim 3 , wherein the frame is the mapped frame.

8. The method of claim 3 , wherein the frame precedes the mapped frame.

9. The method of claim 8 , wherein the mapped frame is an Up-Link (UL) Orthogonal Multi-Frequency Multiple Access (OFDMA) frame.

10. The method of claim 1 , further comprising:

transmitting, by the wireless device, a duplication indication,

wherein the contents of the first portion of the signaling field are equal to the contents of the second portion the signaling field when the duplication indication has a first value; and

wherein the contents of the first portion of the signaling field are different from the contents of the second portion the signaling field when the duplication indication has a second value.

11. The method of claim 10 , wherein one or more of the frame, a Beacon frame transmitted by the wireless device, and an Association Response frame transmitted by the wireless device includes the duplication indication.

12. A method for communicating a signaling field in a wireless communications system, the method comprising:

receiving, by a wireless device, a frame through a medium using a 160 MHz bandwidth, wherein receiving the frame includes:

receiving a first portion of a signaling field in the frame using a first channel having a 20MHz bandwidth;

receiving a second portion of the signaling field in the frame using a second channel having a 20MHz bandwidth,

receiving a third portion of the signaling field in the frame using a third channel having a 20MHz bandwidth, and

receiving a fourth portion of the signaling field in the frame using a fourth channel having a 20MHz bandwidth;

processing, by a wireless device, first contents of the first channel of the frame received through the medium;

processing, by the wireless device, second contents of the second channel of the frame when an operational bandwidth of the wireless device is equal to or greater than a first bandwidth value;

determining contents of the signaling field according to the first contents when the operational bandwidth is less than the first bandwidth value; and

determining the contents of the signaling field according to the first and second contents when the operational bandwidth is equal to or greater than the first bandwidth value,

wherein the second channel is different from the first channel, the third channel is different from the first and second channels, and the fourth channel is different from the first, second and third channels, and

wherein contents of the first portion are different from contents of the second portion, contents of the third portion are the same as the contents of the first portion, and contents of the fourth portion are the same as the contents of the second portion.

13. The method of claim 12 , wherein the signaling field includes mapping information of a mapped frame.