Multi-link operation setup and channel access control
Embodiments of the present invention provide a method and apparatus for simultaneous transmission and reception of data wirelessly using different wireless bands. The multi-link operations described herein can provide higher network throughput and improved network flexibility compared to traditional techniques to wireless communication. Embodiments of the present invention support joint or independent transmission of data over different links, and a full duplex connection can be enabled by independent multi-band operation e.g., a frequency division duplex mode.
1. A method of establishing cooperative multi-band operation between a wireless station (STA) and a wireless access point (AP), the method comprising:
a) transmitting a first frame from the AP to the STA, wherein the first frame comprises a subfield indicating that the AP supports cooperative multi-band operation;
b) transmitting a second frame from the AP to the STA, wherein the second frame comprises band information of a first band and a second band, the first band and the second band supporting cooperative multi-band operation;
c) receiving a third frame at the AP from the STA, wherein the third frame comprises a request to establish cooperative multi-band operation using the first band and the second band;
d) transmitting a fourth frame from the AP to the STA, wherein the fourth frame comprises a confirmation to establish cooperative multi-band operation using the first band and the second band; and
e) using cooperative multi-band channel access to send and receive data between the STA and the AP according to the band information.
2. The method described in claim 1 , further comprising sending and receiving data between the STA and the AP using the cooperative multi-band operation over the first band and the second band.
3. The method described in claim 2 , wherein the first band comprises a 2.4 GHz wireless band and the second band comprises a 5 GHz wireless band.
4. The method described in claim 3 , wherein the STA and AP both comprise a respective 2.4 GHz wireless transceiver for operating over the first band and a 5 GHz wireless transceiver for operating over the second band.
5. The method described in claim 4 , wherein the 2.4 GHz wireless transceivers and the 5 GHz wireless transceivers are operable to communicate simultaneously.
6. The method described in claim 1 , wherein the third frame comprises a MAC address of the STA.
7. The method described in claim 1 , wherein the fourth frame comprises an operating mode for configuring the cooperative multi-band operation.
8. The method described in claim 1 , further comprising receiving a fifth frame at the AP from the STA, wherein the fifth frame comprises band information identifying a modified band, and wherein the modified band replaces the first band for performing the cooperative multi-band operation.
9. The method described in claim 1 , further comprising receiving a fifth frame at the STA from the AP, wherein the fifth frame comprises band information identifying a modified band, and wherein the modified band replaces the first band for performing the cooperative multi-band operation.
10. The method described in claim 1 , further comprising:
receiving a fifth frame at the AP from the STA, wherein the fifth frame comprises a blank band information field; and
terminating the cooperative multi-band operation responsive to receiving the fifth frame.
11. The method described in claim 1 , further comprising:
sending a fifth frame from the AP to the STA, wherein the fifth frame comprises a blank band information field; and
terminating the cooperative multi-band operation responsive to receiving the fifth frame.
12. A system for cooperative multi-band operation for communication with a wireless station (STA), the system comprising:
a wireless access point (AP), wherein:
the AP is operable to transmit a first frame to the STA, wherein the first frame comprises a subfield indicating that the AP supports cooperative multi-band operation,
the AP is operable to transmit a second frame to the STA, wherein the second frame comprises band information of a first band and a second band, the first band and the second band supporting cooperative multi-band operation;
the AP is operable to receive a third frame from the STA, wherein the third frame comprises a request to establish cooperative multi-band operation using the first band and the second band;
the AP is operable to transmit a fourth frame to the STA, wherein the fourth frame comprises a confirmation to establish cooperative multi-band operation using the first band and the second band; and
the AP is operable to send and receive data with the STA according to the band information using cooperative multi-band channel access.
13. The system described in claim 12 , wherein the STA and the AP communicate using the cooperative multi-band operation over the first band and the second band.
14. The system described in claim 12 , wherein the first band comprises a 2.4 GHz wireless band and the second band comprises a 5 GHz wireless band.
15. The system described in claim 14 , wherein the STA and AP both comprise a respective 2.4 GHz wireless transceiver for operating over the first band and a 5 GHz wireless transceiver for operating over the second band.
16. The system described in claim 15 , wherein the 2.4 GHz wireless transceivers and the 5 GHz wireless transceivers are operable to communicate simultaneously.
17. The system described in claim 12 , wherein the third frame comprises a MAC address of the STA.
18. The system described in claim 12 , wherein the fourth frame comprises an operating mode for configuring the cooperative multi-band operation.
19. A dual-band device for performing cooperative multi-band operation with a wireless station (STA), the device comprising:
a first transceiver configured to communicate over a first wireless band;
a second transceiver configured to communicate over a second wireless band, wherein the first transceiver and the second transceiver are operable to communicate simultaneously; and
a cooperative management unit configured to exchange data with the first transceiver and the second transceiver for managing cooperative multi-band channel access of the first transceiver and the second transceiver,
wherein the cooperative management unit is operable to:
cause to be transmitted a first frame to the STA, wherein the first frame comprises a subfield indicating that the device supports cooperative multi-band operation;
cause to be transmitted a second frame to the STA, wherein the second frame comprises band information of a first band and a second band, the first band and the second band supporting cooperative multi-band operation;
cause to be received a third frame from the STA, wherein the third frame comprises a request to establish cooperative multi-band operation using the first band and the second band;
cause to be transmitted a fourth frame to the STA, wherein the fourth frame comprises a confirmation to establish cooperative multi-band operation using the first band and the second band; and
cause to be sent and received data with the STA according to the band information using cooperative multi-band channel access.
20. The device described in claim 19 , wherein the device and the STA communicate using the cooperative multi-band operation over the first band and the second band.