Methods and apparatus for joint multi-AP transmission in WLANs
A method of multi-access point (multi-AP) communication performed by a wireless transmit/receive unit (WTRU) comprises: receiving ( 1510 ) a first trigger frame from a first access point (AP) of a plurality of APs, the first trigger frame comprising first information; receiving ( 1520 ) a second trigger frame from a second AP of the plurality of APs at a predetermined time duration after receiving the first trigger frame, the second trigger frame also comprising the first information of the first trigger frame; generating ( 1530 ) a synchronization frame based on the first trigger frame and the second trigger frame, the synchronization frame comprising synchronization information; transmitting the synchronization frame to at least the first AP and the second AP; and receiving ( 1540 ) a data transmission based on the synchronization information from each of the first AP and the second AP.
1. A method of multi-access point (multi-AP) communication performed by a wireless transmit/receive unit (WTRU), the method comprising:
receiving a first trigger frame from a first access point (AP) of a plurality of APs, the first trigger frame comprising first information;
receiving a second trigger frame from a second AP of the plurality of APs at a predetermined time duration after receiving the first trigger frame, the second trigger frame also comprising the first information of the first trigger frame;
generating a synchronization frame based on the first trigger frame and the second trigger frame, the synchronization frame comprising synchronization information;
transmitting the synchronization frame to at least the first AP and the second AP; and
receiving a data transmission based on the synchronization information from each of the first AP and the second AP.
2. The method of claim 1 , wherein the synchronization information comprises transmission power information, transmission starting time information, or transmission frequency information.
3. The method of claim 1 , wherein the second trigger frame further comprises configuration information for a second data transmission, wherein the configuration information is different from second information of the first trigger frame.
4. The method of claim 3 , wherein the synchronization frame further comprises confirmation information corresponding to the configuration information.
5. The method of claim 1 , wherein the synchronization frame further comprises third information of the first trigger frame.
6. The method of claim 1 , further comprising: transmitting an ACK/NACK report to each of the first AP and the second AP.
7. The method of claim 1 , wherein the first trigger frame comprises WTRU-related information.
8. The method of claim 7 , wherein the WTRU-related information comprises a packet ID, a resource allocation, a spatial stream allocation, or modulation and coding scheme (MCS) related information.
9. A wireless transmit/receive unit (WTRU) configured to perform a multi-access point (multi-AP) communication, the WTRU comprising:
a receiver configured to receive a first trigger frame from a first access point (AP) of a plurality of APs, the first trigger frame comprising first information, and a second trigger frame from a second AP of the plurality of APs at a predetermined time duration after receiving the first trigger frame, the second trigger frame also comprising the first information of the first trigger frame;
a processor configured to generate a synchronization frame based on the first trigger frame and the second trigger frame, the synchronization frame comprising synchronization information; and
a transmitter configured to transmit the synchronization frame to at least the first AP and the second AP;
wherein the receiver is further configured to receive a data transmission based on the synchronization information from each of the first AP and the second AP.
10. The WTRU of claim 9 , wherein the synchronization information comprises transmission power information, transmission starting time information, or transmission frequency information.
11. The WTRU of claim 9 , wherein the second trigger frame further comprises configuration information for a second data transmission, wherein the configuration information is different from second information of the first trigger frame.
12. The WTRU of claim 11 , wherein the synchronization frame further comprises confirmation information corresponding to the configuration information.
13. The WTRU of claim 9 , wherein the synchronization frame further comprises third information of the first trigger frame.
14. The WTRU of claim 9 , the transmitter is further configured to transmit an ACK/NACK report to each of the first AP and the second AP.
15. The WTRU of claim 9 , wherein the first trigger frame comprises WTRU-related information.
16. The WTRU of claim 15 , wherein the WTRU-related information comprises a packet ID, a resource allocation, a spatial stream allocation, or modulation and coding scheme (MCS) related information.