Method and apparatus for sending and receiving signaling in wireless local area network

1. An method applied in a wireless local area network (WLAN), the method comprising:

generating, by an apparatus, a physical protocol data unit (PPDU) for a downlink multiple-user transmission, wherein the PPDU includes: a legacy preamble, a high efficiency Wi-Fi Signaling Field 1 (HEW-SIG1), a high efficiency Wi-Fi Signaling Field 2 (HEW-SIG2) adjacent to the HEW-SIG1 in the PPDU, and a data portion, and wherein the HEW-SIG1 comprises a HEW-SIG2 modulation and coding scheme (HEW-SIG2 MCS) field, the HEW-SIG2 MCS field indicates a transmission modulation and coding scheme (MCS) used to transmit the HEW-SIG2, the HEW-SIG1 further comprises a frame structure indication field, the frame structure indication field indicates whether a frame structure of a scheduling transmission is an uplink structure or a downlink structure, and the HEW-SIG2 comprises resource indication information; and

sending, by the apparatus, the PPDU.

2. The method according to claim 1 , wherein the resource indication information in the HEW-SIG2 comprises information indicating resource locations for communicating data by multiple users.

3. The method according to claim 1 , wherein the HEW-SIG1 further comprises a HEW-SIG2 length field, and the HEW-SIG2 length field indicates a length of the HEW-SIG2.

4. The method according to claim 1 , wherein the HEW-SIG1 further comprises a duration field, and the duration field indicates a remaining duration of occupying a channel.

5. The method according to claim 1 , wherein the legacy preamble includes: a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signaling (L-SIG) located after the L-LTF, and wherein the L-SIG includes information usable for identifying a rate and length information of the PPDU.

6. The method according to claim 1 , wherein the HEW-SIG1 further comprises a transition time field indicating a downlink-uplink transition time point.

7. The method according to claim 1 , wherein the HEW-SIG2 MCS field is located in the HEW-SIG1 field between a guard interval (GI) and a HEW-SIG2 length field.

8. The method according to claim 7 , wherein the HEW-SIG2 MCS field is two bits, the HEW-SIG2 length field is five bits, and the GI field is two bits.

9. The method according to claim 1 , wherein the HEW-SIG1 field further comprises, in sequence, an access point identifier field, a bandwidth field, a guard interval field, the HEW-SIG2 MCS field, a HEW-SIG2 length field, and the frame structure indication field.

10. The method according to claim 1 , wherein the apparatus comprises an access point.

11. A method applied in a wireless local area network (WLAN), the method comprising:

receiving, by an apparatus, a physical protocol data unit (PPDU) for a downlink multiple-user transmission, wherein the PPDU includes: a legacy preamble, a high efficiency Wi-Fi Signaling Field 1 (HEW-SIG1), a high efficiency Wi-Fi Signaling Field 2 (HEW-SIG2) adjacent to the HEW-SIG1 in the PPDU, and a data portion, and wherein the HEW-SIG1 comprises a HEW-SIG2 modulation and coding scheme (HEW-SIG2 MCS) field, the HEW-SIG2 MCS field indicates a transmission modulation and coding scheme (MCS) used to transmit the HEW-SIG2, the HEW-SIG1 further comprises a frame structure indication field, and the frame structure indication field indicates whether a frame structure of a scheduling transmission is an uplink structure or a downlink structure, and the HEW-SIG2 comprises resource indication information; and

parsing, by the apparatus, the PPDU to obtain the data portion according to the HEW-SIG1 and the HEW-SIG2.

12. The method according to claim 11 , wherein the resource indication information in the HEW-SIG2 comprises information indicating resource locations for communicating data by multiple users.

13. The method according to claim 11 , wherein the HEW-SIG1 further comprises a HEW-SIG2 length field, and the HEW-SIG2 length field indicates a length of the HEW-SIG2.

14. The method according to claim 11 , wherein the HEW-SIG1 further comprises a duration field, and the duration field indicates a remaining duration of occupying a channel.

15. The method according to claim 11 , wherein the legacy preamble includes: a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signaling (L-SIG) located after the L-LTF, and wherein the L-SIG includes information usable for identifying a rate and length information of the PPDU.

16. The method according to claim 11 , wherein the HEW-SIG1 further comprises a transition time field indicating a downlink-uplink transition time point.

17. The method according to claim 11 , wherein the HEW-SIG2 MCS field is located in the HEW-SIG1 field between a guard interval (GI) and a HEW-SIG2 length field.

18. The method according to claim 17 , wherein the HEW-SIG2 MCS field is two bits, the HEW-SIG2 length field is five bits, and the GI field is two bits.

19. The method according to claim 11 , wherein the HEW-SIG1 field further comprises, in sequence, an access point identifier field, a bandwidth field, a guard interval field, the HEW-SIG2 MCS field, a HEW-SIG2 length field, and the frame structure indication field.

20. The method according to claim 11 , wherein the apparatus comprises a station.