Extreme-high-throughput enhanced subchannel selective transmission operation in wireless communications

1. A method, comprising:

establishing communications between an access point (AP) and a non-AP station (STA) in a plurality of frequency segments within a basic service set (BSS) bandwidth; and

performing an extreme-high-throughput (EHT) subchannel selective transmission (SST) operation in the plurality of frequency segments by:

negotiating a trigger-enabled target wake time (TWT) session period (SP);

performing a first data transmission in a first frequency segment of the plurality of frequency segments prior to the TWT SP;

switching to a second frequency segment of the plurality of frequency segments to perform a second data transmission on a second link during the TWT SP; and

switching back to the first frequency segment to perform a third data transmission on a first link after the TWT SP,

wherein the negotiating of the TWT SP comprises indicating one of the plurality of frequency segments as containing a resource unit (RU) allocation addressed to the non-AP STA,

wherein the indicating of the one of the plurality of frequency segments as containing the RU allocation comprises indicating the one of the plurality of frequency segments by setting a respective bit of a plurality of bits in an Operating Channel Bitmap subfield in a TWT Channel field in a TWT element corresponding to the one of the plurality of frequency segments to 1,

wherein a length of the TWT Channel field is indicated by a TWT Channel Length subfield in a Control field in the TWT element,

wherein the length of the TWT Channel field is either 1 byte or 2 bytes,

wherein the TWT Channel Length subfield is set to 0 to indicate that the length of the TWT Channel field is 1 byte, and

wherein the TWT Channel Length subfield is set to 1 to indicate that the length of the TWT Channel field is 2 bytes.

2. The method of claim 1 , wherein, in an event that the TWT Channel Length subfield is set to 1, each bit in the Operating Channel Bitmap subfield corresponds to a respective 80-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth.

3. The method of claim 2 , wherein each pair of bits in the Operating Channel Bitmap subfield corresponds to a respective 160-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth, and wherein either a first bit and a second bit are both set to 1 to indicate that a primary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA or a third bit and a fourth bit are both set to 1 to indicate that a secondary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA.

4. The method of claim 1 , wherein the indicating of the one of the plurality of frequency segments as containing the RU allocation further comprises indicating a packet detection channel of the non-AP STA during the TWT SP by setting a respective bit of a plurality of bits in a Packet Detection Channel Bitmap subfield in the TWT Channel field corresponding to a 20-MHz operating channel in one of the plurality of frequency segments to 1 such that packet detection is performed by the non-AP STA in the 20-MHz operating channel.

5. A method, comprising:

establishing communications between an access point (AP) and a non-AP station (STA) on at least a first link and a second link; and

performing an extreme-high-throughput (EHT) multi-link subchannel selective transmission (SST) operation on the first link and the second link by:

negotiating a trigger-enabled target wake time (TWT) session period (SP);

performing a first data transmission on the first link prior to the TWT SP;

switching to the second link to perform a second data transmission on the second link during the TWT SP; and

switching back to the first link to perform a third data transmission on the first link after the TWT SP,

wherein the negotiating of the TWT SP comprises indicating one of the first link and the second link on which an operating frequency segment is located during the TWT SP,

wherein the indicating of the one of the first link and the second link on which the operating frequency segment is located comprises:

indicating the one of the first link and the second link by setting a respective bit of a plurality of bits in a Link identifier (ID) subfield in a TWT Channel field in a TWT element corresponding to the one of the first link and the second link to 1; and

indicating the operating frequency segment among a plurality of frequency segments within a basic service set (BSS) bandwidth by setting a respective bit of a plurality of bits in an Operating Channel Bitmap subfield in the TWT Channel field corresponding to the operating frequency segment to 1.

6. The method of claim 5 , wherein a length of the TWT Channel field is indicated by a TWT Channel Length subfield in a Control field in the TWT element, wherein the length of the TWT Channel field is either 1 byte or 2 bytes, wherein the TWT Channel Length subfield is set to 0 to indicate that the length of the TWT Channel field is 1 byte, and wherein the TWT Channel Length subfield is set to 1 to indicate that the length of the TWT Channel field is 2 bytes.

7. The method of claim 6 , wherein, in an event that the TWT Channel Length subfield is set to 1, each bit in the Operating Channel Bitmap subfield corresponds to a respective 80-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth.

8. The method of claim 7 , wherein each pair of bits in the Operating Channel Bitmap subfield corresponds to a respective 160-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth, and wherein either a first bit and a second bit are both set to 1 to indicate that a primary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA or a third bit and a fourth bit are both set to 1 to indicate that a secondary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA.

9. The method of claim 5 , wherein the indicating of the one of the first link and the second link on which the operating frequency segment is located further comprises indicating a packet detection channel of the non-AP STA during the TWT SP by setting a respective bit of a plurality of bits in a Packet Detection Channel Bitmap subfield in the TWT Channel field corresponding to a 20-MHz operating channel in one of the plurality of frequency segments to 1 such that packet detection is performed by the non-AP STA in the 20-MHz operating channel.

10. An apparatus, comprising:

a transceiver configured to communicate wirelessly; and

a processor coupled to the transceiver and configured to perform operations comprising:

establishing, via the transceiver, communications between an access point (AP) and a non-AP station (STA) in a plurality of frequency segments within a basic service set (BSS) bandwidth or on at least a first link and a second link; and

performing, via the transceiver, an extreme-high-throughput (EHT) subchannel selective transmission (SST) operation in the plurality of frequency segments or on the first link and the second link by:

negotiating a trigger-enabled target wake time (TWT) session period (SP);

performing a first data transmission in a first frequency segment of the plurality of frequency segments or on the first link prior to the TWT SP;

switching to a second frequency segment of the plurality of frequency segments or the second link to perform a second data transmission on the second link during the TWT SP; and

switching back to the first frequency segment or the first link to perform a third data transmission on the first link after the TWT SP,

wherein the negotiating of the TWT SP comprises either:

indicating one of the plurality of frequency segments as containing a resource unit (RU) allocation addressed to the non-AP STA; or

indicating one of the first link and the second link on which an operating frequency segment is located during the TWT SP,

wherein, in indicating the one of the first link and the second link on which the operating frequency segment is located, the processor performs operations comprising:

indicating the one of the first link and the second link by setting a respective bit of a plurality of bits in a Link identifier (ID) subfield in a TWT Channel field in a TWT element corresponding to the one of the first link and the second link to 1;

indicating the operating frequency segment among a plurality of frequency segments within a basic service set (BSS) bandwidth by setting a respective bit of a plurality of bits in an Operating Channel Bitmap subfield in the TWT Channel field corresponding to the operating frequency segment to 1; and

indicating a packet detection channel of the non-AP STA during the TWT SP by setting a respective bit of a plurality of bits in a Packet Detection Channel Bitmap subfield in the TWT Channel field corresponding to a 20-MHz operating channel in one of the plurality of frequency segments to 1 such that packet detection is performed by the non-AP STA in the 20-MHz operating channel.

11. The apparatus of claim 10 , wherein, in indicating the one of the plurality of frequency segments as containing the RU allocation, the processor performs operations comprising:

indicating the one of the plurality of frequency segments by setting a respective bit of a plurality of bits in an Operating Channel Bitmap subfield in a TWT Channel field in a TWT element corresponding to the one of the plurality of frequency segments to 1; and

indicating a packet detection channel of the non-AP STA during the TWT SP by setting a respective bit of a plurality of bits in a Packet Detection Channel Bitmap subfield in the TWT Channel field corresponding to a 20-MHz operating channel in one of the plurality of frequency segments to 1 such that packet detection is performed by the non-AP STA in the 20-MHz operating channel.

12. The apparatus of claim 11 , wherein a length of the TWT Channel field is indicated by a TWT Channel Length subfield in a Control field in the TWT element, wherein the length of the TWT Channel field is either 1 byte or 2 bytes, wherein the TWT Channel Length subfield is set to 0 to indicate that the length of the TWT Channel field is 1 byte, wherein the TWT Channel Length subfield is set to 1 to indicate that the length of the TWT Channel field is 2 bytes, wherein, in an event that the TWT Channel Length subfield is set to 1, each bit in the Operating Channel Bitmap subfield corresponds to a respective 80-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth, wherein each pair of bits in the Operating Channel Bitmap subfield corresponds to a respective 160-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth, and wherein either a first bit and a second bit are both set to 1 to indicate that a primary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA or a third bit and a fourth bit are both set to 1 to indicate that a secondary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA.

13. The apparatus of claim 10 , wherein a length of the TWT Channel field is indicated by a TWT Channel Length subfield in a Control field in the TWT element, wherein the length of the TWT Channel field is either 1 byte or 2 bytes, wherein the TWT Channel Length subfield is set to 0 to indicate that the length of the TWT Channel field is 1 byte, wherein the TWT Channel Length subfield is set to 1 to indicate that the length of the TWT Channel field is 2 bytes, wherein, in an event that the TWT Channel Length subfield is set to 1, each bit in the Operating Channel Bitmap subfield corresponds to a respective 80-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth, wherein each pair of bits in the Operating Channel Bitmap subfield corresponds to a respective 160-MHz frequency segment in the BSS bandwidth which is a 320-MHz bandwidth, and wherein either a first bit and a second bit are both set to 1 to indicate that a primary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA or a third bit and a fourth bit are both set to 1 to indicate that a secondary 160-MHz frequency segment in the BSS bandwidth contains the RU allocation addressed to the non-AP STA.

14. The apparatus of claim 10 , wherein, in performing the EHT SST operation, the processor performs, as the non-AP STA, operations comprising:

exchanging a request-to-send (RTS) frame and a clear-to-send (CTS) frame on the first link for a first STA in the non-AP STA;

switching a second receive (Rx) chain of a second STA in the non-AP STA from the second link to the first link;

receiving an aggregated medium access control (MAC) protocol data unit (A-MPDU) on the first link for the first STA;

transmitting an acknowledgement (ACK) responsive to the receiving of the A-MPDU on the first link for the first STA; and

switching a first Rx chain of the first STA from the first link to the second link after transmitting the ACK.

15. The apparatus of claim 10 , wherein, in performing the EHT SST operation, the processor performs, as the non-AP STA and during the TWT SP, operations comprising:

exchanging a multi-user (MU) request-to-send (RTS) frame and a clear-to-send (CTS) frame on the second link for a first STA in the non-AP STA;

switching a second receive (Rx) chain of a second STA in the non-AP STA from the first link to the second link;

receiving an aggregated medium access control (MAC) protocol data unit (A-MPDU) on the second link for the first STA; and

transmitting an acknowledgement (ACK) responsive to the receiving of the A-MPDU on the second link for the first STA.

16. The apparatus of claim 10 , wherein, in performing the EHT SST operation, the processor performs, as the non-AP STA and during the TWT SP, operations comprising:

receiving a respective Buffer Status Report Poll (BSRP) Trigger frame in each of a primary 160-MHz frequency segment and a secondary 160-MHz frequency segment on the second link for a first STA in the non-AP STA;

transmitting a respective trigger-based (TB) Physical Layer Convergence Protocol (PLCP) Protocol Data Unit (PPDU) in each of the primary 160-MHz frequency segment and the secondary 160-MHz frequency segment on the second link for the first STA;

switching a second receive (Rx) chain of a second STA in the non-AP STA from the first link to the second link;

receiving a respective aggregated medium access control (MAC) protocol data unit (A-MPDU) in each of the primary 160-MHz frequency segment and the secondary 160-MHz frequency segment on the second link for the first STA; and

transmitting a respective acknowledgement (ACK) responsive to the receiving of the A-MPDU in each of the primary 160-MHz frequency segment and the secondary 160-MHz frequency segment on the second link for the first STA.