Method for transmitting and receiving data in wireless local area network and apparatus for the same
Disclosed are a method and an apparatus for transmitting and receiving data in a Wireless Local Area Network (WLAN) system. A method for transmitting data may comprise generating a physical layer (PHY) frame including a payload in which a plurality of Medium Access Control protocol data units (MPDUs) are multiplexed; and transmitting the PHY frame, wherein the PHY frame includes information on subcarriers occupied by each of the plurality of MPDUs in an Orthogonal Frequency Division Multiplexing (OFDM) symbol of the payload. Therefore, data transmission efficiency in a WLAN system can be enhanced.
1. A method performed by a wireless device of transmitting an acknowledgement in a wireless communications system,
receiving a frame from an access point, wherein the frame elicits an acknowledgement;
generating the acknowledgement in response to receiving the frame, the acknowledgement comprising:
i) a traffic identifier (TID) information when the acknowledgment is associated with a response to a VHT single A-MPDU (Aggregate MAC (Medium Access Control) Protocol Data Unit including only one MPDU), wherein when the acknowledgment is associated with responses to a plurality of VHT single A-MPDUs, respective TID information is included for each of TIDs associated with acknowledgment to the plurality of VHT single A-MPDUs, and
ii) one or more block acknowledgement (BA) information when the acknowledgement is associated with a response to an A-MPDU (Aggregate MPDU), the A-MPDU including a plurality of MPDUs, wherein a respective BA information is included for each of TIDs associated with acknowledgement to the A-MPDU, each of the BA information comprising a TID information, a starting sequence control information, and a BA bitmap; and
transmitting the acknowledgement to the access point.
2. The method of claim 1 , wherein the frame comprises two or more MPDUs which belong to two or more TIDs.
3. The method of claim 1 , wherein the VHT single A-MPDU solicits an immediate acknowledgement.
4. The method of claim 1 , wherein the A-MPDU solicits an immediate block acknowledgement.
5. The method of claim 1 , where the frame is a BlockAck Request frame.
6. The method of claim 1 , wherein a number of TID information is identical to a number of TID associated with the acknowledgement to the frame.
7. The method of claim 1 , wherein the BA bitmap comprises a bitmap indicating whether each of corresponding MPDUs is successfully received or not.
8. The method of claim 1 , wherein the starting sequence control information is indicative of a sequence number of a first MPDU among MPDUs indicated by the BA bitmap.
9. A station for 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:
receiving a frame from an access point, wherein the frame elicits an acknowledgement;
generating the acknowledgement in response to receiving the frame, wherein the acknowledgement comprising:
i) a traffic identifier (TID) information when the acknowledgment is associated with a response to a VHT single A-MPDU (Aggregate MAC (Medium Access Control) Protocol Data Unit including only one MPDU), and
ii) a block acknowledgement (BA) information when the acknowledgement is associated with a response to an A-MPDU (Aggregate MPDU), the A-MPDU including a plurality of MPDUs, the BA information comprises a TID information, a starting sequence control information, and a BA bitmap; and
transmitting the acknowledgement to the access point,
wherein respective TID information or respective BA information is included in the acknowledgement for each of TIDs associated with acknowledgement to the frame.
10. The station of claim 9 , wherein the frame comprises two or more MPDUs which belong to two or more TIDs.
11. The station of claim 9 , wherein the VHT single A-MPDU solicits an immediate acknowledgement.
12. The station of claim 9 , wherein the A-MPDU solicits an immediate block acknowledgement.
13. The station of claim 9 , where the frame is a BlockAck Request frame.
14. The station of claim 9 , wherein a number of TID information is identical to a number of TID associated with the acknowledgement to the frame.
15. The station of claim 9 , wherein the BA bitmap comprises a bitmap indicating whether each of corresponding MPDUs is successfully received or not.
16. The station of claim 9 , wherein the starting sequence control information is indicative of a sequence number of a first MPDU among MPDUs indicated by the BA bitmap.
17. A computer-implemented method of facilitating communication by a wireless device in a wireless network, the method comprising:
receiving a frame from an access point, wherein the frame elicits an acknowledgement;
generating the acknowledgement in response to receiving the frame, wherein the acknowledgement comprising:
i) a traffic identifier (TID) information when the acknowledgment is associated with a response to a VHT single A-MPDU (Aggregate MAC (Medium Access Control) Protocol Data Unit including only one MPDU), and
ii) a block acknowledgement (BA) information when the acknowledgement is associated with a response to an A-MPDU (Aggregate MPDU), the A-MPDU including a plurality of MPDUs, the BA information comprises a TID information, a starting sequence control information, and a BA bitmap, and
transmitting the acknowledgement to the access point,
wherein respective TID information or respective BA information is included in the acknowledgement for each of TIDs associated with acknowledgement to the frame.
18. The method of claim 17 , wherein the frame comprises two or more MPDUs which belong to two or more TIDs.
19. The method of claim 17 , wherein a number of TID information is identical to a number of TID associated with the acknowledgement to the frame.