Wireless fidelity uplink non-orthogonal multiple access

1. A method comprising:

instructing, by a wireless fidelity (WiFi) access node, a first device to communicate using an uplink frequency band with a first uplink power;

instructing, by the WiFi access node, a second device to communicate using the uplink frequency band with a second uplink power different from the first uplink power;

receiving, by the WiFi access node, a first message comprising a first portion transmitted by the first device with the first uplink power and a second portion transmitted by the second device with the second uplink power;

decoding, by the WiFi access node, the first portion of the first message;

after decoding the first portion of the first message, removing the first portion from the first message to form a second message comprising the second portion; and

decoding, by the WiFi access node, the second portion in the second message.

2. The method of claim 1 , wherein instructing the first and second devices is accomplished by broadcasting a message to the first and second devices, the message comprising the uplink frequency band, the first uplink power, and the second uplink power.

3. The method of claim 2 , wherein the message is a trigger frame comprising a plurality of user info fields, wherein a first user info field of the plurality of user info fields comprises an identifier of the first device and an indication of the first uplink power, and wherein a second user info field of the plurality of user info fields comprises an identifier of the second device and an indication of the second uplink power.

4. The method of claim 1 , wherein instructing the first and second devices is accomplished by communicating a first message to the first device and a second message to the second device, the first message indicating the uplink frequency band and the first uplink power and the second message indicating the uplink frequency band and the second uplink power.

5. The method of claim 1 , wherein the first uplink power is higher than the second uplink power.

6. The method of claim 5 , wherein the first device is closer to the WiFi access node than the second device.

7. The method of claim 1 , further comprising instructing, by the WiFi access node, a third device to communicate using a second uplink frequency band with the first uplink power.

8. The method of claim 1 , further comprising determining the first and second uplink powers based on a number of devices communicatively coupled to the WiFi access node.

9. A WiFi access node comprising:

a memory; and

a hardware processor communicatively coupled to the memory, the hardware processor configured to:

instruct, by a WiFi access node, a first device to communicate using an uplink frequency band with a first uplink power; and

instruct a second device to communicate using the uplink frequency band with a second uplink power different from the first uplink power;

receive, by the WiFi access node, a first message comprising a first portion transmitted by the first device with the first uplink power and a second portion transmitted by the second device with the second uplink power;

decode, by the WiFi access node, the first portion of the first message;

after decoding the first portion of the first message, remove the first portion from the first message to form a second message comprising the second portion; and

decode, by the WiFi access node, the second portion in the second message.

10. The WiFi access node of claim 9 , wherein instructing the first and second devices is accomplished by broadcasting a message to the first and second devices, the message comprising the uplink frequency band, the first uplink power, and the second uplink power.

11. The WiFi access node of claim 9 , wherein instructing the first and second devices is accomplished by communicating a first message to the first device and a second message to the second device, the first message indicating the uplink frequency band and the first uplink power and the second message indicating the uplink frequency band and the second uplink power.

12. The WiFi access node of claim 9 , wherein the first uplink power is higher than the second uplink power.

13. The WiFi access node of claim 12 , wherein the first device is closer to the WiFi access node than the second device.

14. The WiFi access node of claim 9 , wherein the first and second uplink powers are determined based on a number of devices connected to the WiFi access node.

15. The WiFi access node of claim 9 , further comprising determining the first and second uplink powers based on a number of devices communicatively coupled to the WiFi access node.

16. A method comprising:

receiving, at a first device and from a WiFi access node, an instruction to communicate with the WiFi access node using an uplink frequency band with a first uplink power, wherein a second device was instructed to communicate with the WiFi access node using the uplink frequency band with a second uplink power; and

communicating, by the first device, a first message to the WiFi access node using the uplink frequency band with the first uplink power, wherein the WiFi access node receives a second message comprising first message and a third message transmitted by the second device using the uplink frequency band and the second uplink power, wherein the WiFi access node decodes the first message and then removes the first message from the second message to form a fourth message comprising the third message, and wherein the WiFi access node decodes the third message in the fourth message.

17. The method of claim 16 , wherein the first uplink power is higher than the second uplink power.

18. The method of claim 17 , wherein the first device is closer to the WiFi access node than the second device.