Methods and apparatus for multiplexing transmission control information
Methods and systems for wireless communication are disclosed. In one aspect, a method includes generating device specific transmission control information for each of two devices, transmitting the transmission control information for each device over different frequencies, and transmitting data to each of the devices as part of a communication according to the respective transmission control information. In some aspects, the transmission control information for each device is encoded based on an identifier of the device. For example, in some aspects, an error detection value such as a cyclic redundancy check, is exclusive or'ed with an identifier of the device, such as an AID, PAID, or group identifier. The resulting value is transmitted along with the transmission control information. A device receiving the wireless frame may only be able to decode its own transmission control information, as the decoding is also based on the receiving device's identifier.
1. A method of receiving wireless data by a wireless device from a wireless network, comprising:
receiving, by the wireless device, a wireless packet including a preamble and a data portion, the preamble comprising first transmission control information within a first frequency range and second transmission control information within a second frequency range that does not overlap the first frequency range, the data portion including encoded first data within a third frequency range different than the first frequency range and encoded second data within a fourth frequency range different than the second frequency range and that does not overlap the third frequency range, the first transmission control information indicating the third frequency range, the second transmission control information indicating the fourth frequency range;
decoding the first transmission control information to determine whether the wireless device is identified by the first transmission control information; and
decoding the first data in response to the decoded first transmission control information identifying the wireless device.
2. The method of claim 1 , further comprising decoding the second transmission control information in response to the first transmission control information not identifying the wireless device.
3. The method of claim 2 , further comprising decoding the second data in response to the second transmission control information identifying the wireless device.
4. The method of claim 1 , wherein the first transmission control information and the second transmission control information are both encoded within a HE-SIGB field.
5. The method of claim 1 , further comprising parsing the first transmission control information based on an identifier of the wireless device to determine whether the wireless device is identified by the first transmission control information.
6. The method of claim 1 , further comprising decoding the first transmission control information using a 4× tone plan.
7. The method of claim 1 , wherein the first frequency range is 20 Mhz wide and the second frequency range is 20 Mhz wide.
8. The method of claim 1 , wherein the wireless packet is a multi-user communication employing orthogonal frequency division multiple access (OFDMA).
9. An apparatus for receiving wireless data by a wireless device from a wireless network, the apparatus comprising:
a receiver configured to receive a wireless packet including a preamble and a data portion, the preamble comprising first transmission control information within a first frequency range and second transmission control information within a second frequency range that does not overlap the first frequency range, the data portion including encoded first data within a third frequency range different than the first frequency range and encoded second data within a fourth frequency range different than the second frequency range and that does not overlap the third frequency range, the first transmission control information indicating the third frequency range, the second transmission control information indicating the fourth frequency range; and
a processor, configured to:
decode the first transmission control information to determine whether the apparatus is identified by the first transmission control information, and
decode the first data in response to the decoded first transmission control information identifying the apparatus.
10. The apparatus of claim 9 , wherein the processor is further configured to decode the second transmission control information in response to the first transmission control information not identifying the wireless device.
11. The apparatus of claim 10 , wherein the processor is further configured to decode the second data in response to the second transmission control information identifying the wireless device.
12. The apparatus of claim 9 , wherein the first transmission control information and the second transmission control information are both encoded within a HE-SIGB field.
13. The apparatus of claim 9 , wherein the processor is further configured to parse the first transmission control information based on an identifier of the wireless device to determine whether the wireless device is identified by the first transmission control information.
14. The apparatus of claim 9 , wherein the processor is further configured to decode the first transmission control information using a 4× tone plan.
15. The apparatus of claim 9 , wherein the first frequency range is 20 Mhz wide and the second frequency range is 20 Mhz wide.
16. The apparatus of claim 9 , wherein the wireless packet is a multi-user communication employing orthogonal frequency division multiple access (OFDMA).