Aggregation methods and systems for multi-user MIMO or OFDMA operation
In an example of multi-user wireless communications, an access point may send a downlink frame, including a first signaling field and a second signaling field, to multiple stations. The first and second signaling fields are located in a header of the downlink frame. The first signaling field indicates whether the downlink frame is associated with a multi-user (MU) multi-input multi-output (MIMO) transmission. The second signaling field includes an attribute of the MU-MIMO transmission or a non-MU-MIMO transmission. A resource unit of the downlink frame includes a MU-MIMO payload when the downlink frame is associated with the MU-MIMO transmission. A resource unit of the downlink frame includes a non-MU-MIMO payload when the downlink frame is associated with the non-MU-MIMO transmission. The stations may decode one or more portions of the downlink frame based on the attribute in the second signaling field. Other methods, apparatus, and computer-readable media are also disclosed.
1. A station for facilitating multi-user communication in a wireless network, the station comprising:
one or more memories; and
one or more processors coupled to the one or more memories, the one or more processors configured to cause:
determining whether a first header field of a received downlink frame indicates a first type of transmission or a second type of transmission;
determining one or more attributes of the first type of transmission in a second header field of the received downlink frame when the first header field is determined to indicate the first type of transmission;
determining one or more attributes of the second type of transmission in the second header field of the received downlink frame when the first header field is determined to indicate the second type of transmission; and
processing one or more portions of the received downlink frame based on the one or more attributes of the first type of transmission or the one or more attributes of the second type of transmission,
wherein when the first header field is determined to indicate the first type of transmission, the second header field comprises the one or more attributes of the first type of transmission, and
wherein when the first header field is determined to indicate the second type of transmission, the second header field comprises the one or more attributes of the second type of transmission.
2. The station of claim 1 , wherein the first type of transmission is a multi-user (MU) multi-input-multi-output (MIMO) transmission, and wherein the second type of transmission is a non-MU MIMO transmission.
3. The station of claim 1 , wherein the first header field is a high efficiency signal-A (HE SIG-A) field and the second header field is a high efficiency signal-B (HE SIG-B) field.
4. The station of claim 1 , wherein the one or more processors are configured to cause:
decoding one or more portions of the downlink frame based on the one or more attributes of the first type of transmission in the second header field or the one or more attributes of the second type of transmission in the second header field; and
providing the decoded one or more portions of the downlink frame for processing.
5. The station of claim 1 , wherein the one or more attributes of the second type of transmission in the second header field are a subset of the one or more attributes of the first type of transmission in the second header field.
6. The station of claim 1 , wherein the downlink frame comprises one or more resource units associated with a full bandwidth of the first type of transmission.
7. The station of claim 1 , wherein the second header field comprises attributes of the first type of transmission, and the attributes of the first type of transmission comprise a station identifier, a number of spatial streams (NSTS), modulation and coding scheme (MCS), and coding.
8. The station of claim 1 , wherein the second type of transmission identifies an orthogonal frequency-division multiple access (OFDMA) transmission.
9. The station of claim 1 , wherein the downlink frame comprises a plurality of resource units that are associated with respective sub-bandwidths of a full bandwidth of the second type of transmission.
10. The station of claim 1 , wherein the first header field indicates whether each 20 MHz segment of the downlink frame is the first type of transmission.
11. The station of claim 1 , wherein the first header field indicates a bandwidth and an indication of whether each sub-channel in the downlink frame with a size of the bandwidth is the first type of transmission.
12. A non-transitory computer-readable storage medium storing computer-executable instructions that, when executed by one or more processors, cause one or more processors to perform operations, the operations comprising:
generating a downlink frame for a multi-user transmission, the downlink frame comprising a first header field and a second header field, wherein the first header field indicates whether the downlink frame is associated with a first type of transmission or a second type of transmission, wherein the second header field comprises one or more attributes of the first type of transmission when the downlink frame is associated with the first type of transmission, and wherein the second header field comprises one or more attributes of the second type of transmission when the downlink frame is associated with the second type of transmission; and
providing the downlink frame for the multi-user transmission directed to a plurality of stations.
13. The non-transitory computer-readable storage medium of claim 12 , wherein the first header field is a high efficiency signal-A (HE SIG-A) field, and wherein the second header field is a high efficiency signal-B (HE SIG-B) field.
14. The non-transitory computer-readable storage medium of claim 12 , wherein the one or more attributes of the second type of transmission in the second header field are a subset of the one or more attributes of the first type of transmission in the second header field.
15. The non-transitory computer-readable storage medium of claim 12 , wherein the downlink frame comprises one or more resource units associated with a full bandwidth of the first type of transmission.
16. The non-transitory computer-readable storage medium of claim 12 , wherein the downlink frame comprises a MU-MIMO physical layer convergence procedure (PLCP) service data unit (PSDU) when the first header field indicates the first type of transmission.
17. The non-transitory computer-readable storage medium of claim 12 , wherein the first header field indicates a bandwidth and an indication of whether each sub-channel in the downlink frame with a size of the bandwidth is the first type of transmission.
18. The non-transitory computer-readable storage medium of claim 12 , wherein the first header field indicates whether each 20 MHz segment of the downlink frame is the second type of transmission.
19. A computer-implemented method of facilitating multi-user communication in a wireless network, the method comprising:
determining whether a first header field of a received downlink frame indicates a first type of transmission or a second type of transmission;
determining one or more attributes of the first type of transmission in a second header field of the received downlink frame when the first header field is determined to indicate the first type of transmission;
determining one or more attributes of the second type of transmission in the second header field of the received downlink frame when the first header field is determined to indicate the second type of transmission; and
processing one or more portions of the received downlink frame based on the one or more attributes of the first type of transmission or the one or more attributes of the second type of transmission,
wherein when the first header field is determined to indicate the first type of transmission, the second header field comprises the one or more attributes of the first type of transmission, and
wherein when the first header field is determined to indicate the second type of transmission, the second header field comprises the one or more attributes of the second type of transmission.
20. The computer-implemented method of claim 19 , further comprising:
decoding, by a station of a plurality of stations, the one or more portions of the downlink frame based on the one or more attributes of the second type of transmission in the second header field,
wherein the second type of transmission identifies an orthogonal frequency-division multiple access (OFDMA) transmission.