Method and apparatus for enhanced preamble punctured PPDU in a wireless network
Embodiments of the present invention provide a punctured preamble enabling wireless devices to efficiently use a channel (e.g., an 80 or 160 MHz channel) where a primary service is operating. A Wideband Channel Access Mechanism for 20 MHz/80 MHz operating STAs is provided so that a 20 MHz/80 MHz operating STA can dynamically move to a secondary channel to improve wireless performance of the STA. An AP coordinates the operating channel switch of the 20 MHz/80 MHz operating STA. An EHT cooperative multi-band operation can be applied to the preamble punctured PPDU0 for simultaneous multi-band operation.
1. A method of wireless communication using a preamble punctured Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) performed by a wireless station (STA), the method comprising:
receiving a fixed-length SIG field in a preamble punctured PPDU on a primary 20 MHz channel of an 80 MHz channel from a wireless access point (AP), wherein the 80 MHz channel is operable to service a wireless device, and the fixed-length SIG field comprises an indication that another 20 MHz channel of the 80 MHz channel is punctured; and
receiving data from the wireless AP over the primary 20 MHz channel.
2. The method as recited in claim 1 , wherein the 80 MHz channel comprises the primary 20 MHz channel, a 20 MHz secondary channel, and a 40 MHz secondary channel, and wherein the 20 MHz secondary channel is punctured.
3. The method as recited in claim 2 , wherein a bandwidth field of the preamble punctured PPDU comprises a value of 4.
4. The method as recited in claim 1 , wherein the 80 MHz channel comprises the primary 20 MHz channel, a 20 MHz secondary channel, 40 MHz left secondary channel, and a 40 MHz right secondary channel, and wherein the 40 MHz left secondary channel is punctured.
5. The method as recited in claim 4 , wherein a bandwidth field of the preamble punctured PPDU comprises a value of 5.
6. The method as recited in claim 1 , further comprising:
receiving a multi-user request to send (MU-RTS) trigger frame from the AP; and
transmitting a clear to send (CTS) response to the AP.
7. The method as recited in claim 6 , the AP solicits simultaneous CTS responses from a plurality of wireless STAs.
8. The method as recited in claim 7 , wherein the MU-RTS trigger frame comprises a Disallowed Subchannel Bitmap indicating disallowed subchannels, and wherein the CTS response excludes the disallowed subchannels.
9. The method as recited in claim 8 , further comprising setting an AID12 subfield of the MU-RTS trigger frame according to an Association ID (AID) of the STA.
10. A method of wireless communication using a preamble punctured Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) performed by a wireless station (STA), the method comprising:
receiving a multi-user request to send (MU-RTS) trigger frame from a wireless access point (AP), wherein the MU-RTS trigger frame comprises a Disallowed Subchannel Bitmap indicating allowed and disallowed subchannels of the preamble punctured PPDU;
receiving a fixed-length SIG field in another preamble punctured PPDU on a primary 20 MHz channel of an 80 MHz channel from the wireless AP, wherein the fixed-length SIG field comprises an indication that another 20 MHz channel of the 80 MHz channel is punctured;
transmitting a clear to send (CTS) response to the wireless AP over the allowed subchannel indicated in the Disallowed Subchannel Bitmap; and
receiving data from the wireless AP over an allowed subchannel indicated in the Disallowed Subchannel Bitmap in the preamble punctured PPDU.
11. The method as recited in claim 10 , wherein the CTS response is transmitted on a primary 80 MHz wireless channel.
12. The method as recited in claim 11 , further comprising transmitting another CTS response on a secondary 80 MHz wireless channel.
13. A method of wireless communication using a preamble punctured Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU), for EHT cooperative multi-band operation, the method comprising:
puncturing a 20 MHz channel of a first wireless channel, wherein the first wireless channel is operable to service a wireless device;
encoding an indication of the punctured 20 MHz channel in a fixed-length SIG field; and
transmitting the fixed-length SIG field in a preamble punctured PPDU on the first wireless channel to a wireless station (STA), wherein the preamble punctured PPDU comprises two PPDUs for the wireless STA in a first resource unit (RU) for the first 80 MHz wireless channel and a second RU for a second 80 MHz wireless channel, and wherein the wireless STA is configured for simultaneous data transmission and reception on the first 80 MHz wireless channel and the second 80 MHz wireless channel, and wherein the fixed-length SIG field comprises an indication that another 20 MHz channel of the first 80 MHz channel is punctured.
14. A method as recited in claim 13 , further comprising the wireless STA performing a cooperative multi-band operation using the first 80 MHz wireless channel and the second 80 MHz wireless channel simultaneously.
15. The method as recited in claim 13 , wherein the wireless STA comprises two transceivers for performing a cooperative multi-band operation.
16. The method as recited in claim 15 , wherein the two transceivers comprise a 2.4 GHz transceiver and a 5 GHz transceiver.
17. The method as recited in claim 15 , wherein the two transceivers comprise a 5 GHz transceiver and a 6 GHz transceiver.
18. The method as recited in claim 15 , further comprising:
transmitting a multi-user request to send (MU-RTS) frame to the wireless STA; and
receiving a clear to send (CTS) response from the wireless STA, wherein the MU-RTS trigger frame comprises a Disallowed Subchannel Bitmap indicating disallowed subchannels, and wherein the CTS response excludes the disallowed subchannels.
19. An apparatus for wireless communication using a preamble punctured Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU), the apparatus comprising:
a processor;
a memory coupled to the processor operable to store data; and
a radio, and wherein the processor is operable to:
receive a fixed-length SIG field in a preamble punctured PPDU on a primary 20 MHz channel of an 80 MHz channel from a wireless access point (AP), wherein the 80 MHz channel is operable to service a wireless device, and the fixed-length SIG field comprises an indication that another 20 MHz channel of the 80 MHz channel is punctured; and
receive data from the wireless AP over the primary 20 MHz channel.
20. The apparatus as recited in claim 19 , wherein the 80 MHz channel comprises the primary 20 MHz channel, a 20 MHz secondary channel, and a 40 MHz secondary channel, and wherein the 20 MHz secondary channel is punctured.
21. The apparatus as recited in claim 20 , wherein a bandwidth field of the preamble punctured PPDU comprises a value of 4.
22. The apparatus as recited in claim 19 , wherein the 80 MHz channel comprises the primary 20 MHz channel, a 20 MHz secondary channel, 40 MHz left secondary channel, and a 40 MHz right secondary channel, and wherein the 40 MHz left secondary channel is punctured.
23. The apparatus as recited in claim 22 , wherein a bandwidth field of the preamble punctured PPDU comprises a value of 5.
24. The apparatus as recited in claim 19 , wherein the processor is further operable to:
receive a multi-user request to send (MU-RTS) trigger frame from the AP; and
transmit a clear to send (CTS) response to the AP.
25. The apparatus as recited in claim 24 , wherein the wireless AP solicits simultaneous CTS responses from a plurality of wireless STAs.
26. The apparatus as recited in claim 24 , wherein the MU-RTS trigger frame comprises a Disallowed Subchannel Bitmap indicating disallowed subchannels, and wherein the CTS response excludes the disallowed subchannels.
27. The apparatus as recited in claim 24 , wherein the processor is further operable to set an AID12 subfield of the MU-RTS Trigger frame according to an Association ID (AID) of the STA.