Apparatus, system and method of beam refinement protocol (BRP) transmit (TX) sector sweep (SS) (TXSS)

1. An apparatus comprising:

a processor comprising logic and circuitry configured to cause an initiator station (STA) of a Beam Refinement Protocol (BRP) Transmit (TX) Sector Sweep (TXSS) procedure to:

transmit a first BRP frame to initiate the BRP TXSS procedure with a responder STA, the first BRP frame comprising an Enhanced Directional Multi-Gigabit (EDMG) BRP request element comprising a TXSS Multiple Input Multiple Output (MIMO) (TXSS-MIMO) field to indicate whether the BRP TXSS procedure is a Single Input Single Output (SISO) BRP TXSS procedure or a MIMO BRP TXSS procedure;

process a second BRP frame from the responder STA, the second BRP frame in response to the first BRP frame, the second BRP frame to confirm the BRP TXSS procedure; and

in accordance with the TXSS-MIMO field, perform an initiator BRP TXSS of the SISO BRP TXSS procedure or an initiator BRP TXSS of the MIMO BRP TXSS procedure, wherein the initiator BRP TXSS of the SISO BRP TXSS procedure comprises transmission of one or more EDMG BRP-TX packets to the responder STA via a single transmit chain, wherein the initiator BRP TXSS of the MIMO BRP TXSS procedure comprises transmission of the one or more EDMG BRP-TX packets to the responder STA via multiple transmit chains; and

a memory to store information processed by the processor.

2. The apparatus of claim 1 configured to cause the initiator STA to set the TXSS-MIMO field to a value “0” or a value “1”, the value “0” to indicate that the BRP TXSS procedure is the SISO BRP TXSS procedure, the value “1” to indicate that the BRP TXSS procedure is the MIMO BRP TXSS procedure.

3. The apparatus of claim 1 configured to cause the initiator STA to set the TXSS-MIMO field to a value “1” to indicate that the BRP TXSS procedure is the MIMO BRP TXSS procedure, and to perform the initiator BRP TXSS of the MIMO BRP TXSS procedure by transmitting the one or more EDMG BRP-TX packets via the multiple transmit chains.

4. The apparatus of claim 3 , wherein a Training (TRN) field of the one or more EDMG BRP-TX packets comprises a plurality of orthogonal waveforms, a count of the plurality of orthogonal waveforms is based on a count of the multiple transmit chains.

5. The apparatus of claim 3 configured to cause the initiator STA to set a TXVECTOR parameter EDMG_TRN_LEN for the EDMG BRP-TX packets to a value, which is based on a count of Training (TRN) units for transmit training.

6. The apparatus of claim 3 configured to cause the initiator STA to set to “1” a TRN-Unit Receive (RX) pattern field in an EDMG Header A of the EDMG BRP-TX packets.

7. The apparatus of claim 1 configured to cause the initiator STA to:

during a responder BRP TXSS of the BRP TXSS procedure, receive one or more EDMG BRP-TX packets from the responder STA; and

transmit a BRP feedback frame to the responder STA, the BRP feedback frame comprising feedback based on measurements on the one or more EDMG BRP-TX packets from the responder STA.

8. The apparatus of claim 7 configured to cause the initiator STA to transmit the BRP feedback frame using a same antenna configuration as an antenna configuration for transmission of the first BRP frame.

9. The apparatus of claim 7 configured to cause the initiator STA to begin the responder BRP TXSS a Medium Beamforming Inter-Frame Space (MBIFS) after the initiator BRP TXSS.

10. The apparatus of claim 1 configured to cause the initiator STA to set the TXSS-MIMO field to a value “0” to indicate that the BRP TXSS procedure is the SISO BRP TXSS procedure, and to perform the initiator BRP TXSS of the SISO BRP TXSS procedure by transmitting the one or more EDMG BRP-TX packets via the single transmit chain.

11. The apparatus of claim 1 configured to cause the initiator STA to process a BRP feedback frame from the responder STA, the BRP feedback frame from the responder STA comprising feedback based on measurements on the one or more EDMG BRP-TX packets.

12. The apparatus of claim 1 configured to cause the initiator STA to transmit the first BRP frame, and the one or more EDMG BRP-TX packets over a channel bandwidth of at least 2.16 Gigahertz (GHZ) in a frequency band above 45 Gigahertz (GHz).

13. The apparatus of claim 1 configured to cause the initiator STA to transmit the first BRP frame, and the one or more EDMG BRP-TX packets over a channel bandwidth of 4.32 Gigahertz (GHz), 6.48 GHz, or 8.64 GHz.

14. The apparatus of claim 1 comprising a radio, the processor configured to cause the radio to transmit the first BRP frame and the one or more EDMG BRP-TX packets.

15. The apparatus of claim 14 comprising one or more antennas connected to the radio, and another processor to execute instructions of an operating system.

16. A product comprising one or more tangible computer-readable non-transitory storage media comprising computer-executable instructions operable to, when executed by at least one processor, enable the at least one processor to cause an initiator station (STA) of a Beam Refinement Protocol (BRP) Transmit (TX) Sector Sweep (TXSS) procedure to:

transmit a first BRP frame to initiate the BRP TXSS procedure with a responder STA, the first BRP frame comprising an Enhanced Directional Multi-Gigabit (EDMG) BRP request element comprising a TXSS Multiple Input Multiple Output (MIMO) (TXSS-MIMO) field to indicate whether the BRP TXSS procedure is a Single Input Single Output (SISO) BRP TXSS procedure or a MIMO BRP TXSS procedure;

process a second BRP frame from the responder STA, the second BRP frame in response to the first BRP frame, the second BRP frame to confirm the BRP TXSS procedure; and

in accordance with the TXSS-MIMO field, perform an initiator BRP TXSS of the SISO BRP TXSS procedure or an initiator BRP TXSS of the MIMO BRP TXSS procedure, wherein the initiator BRP TXSS of the SISO BRP TXSS procedure comprises transmission of one or more EDMG BRP-TX packets to the responder STA via a single transmit chain, wherein the initiator BRP TXSS of the MIMO BRP TXSS procedure comprises transmission of the one or more EDMG BRP-TX packets to the responder STA via multiple transmit chains.

17. The product of claim 16 , wherein the instructions, when executed, cause the initiator STA to set the TXSS-MIMO field to a value “0” or a value “1”, the value “0” to indicate that the BRP TXSS procedure is the SISO BRP TXSS procedure, the value “1” to indicate that the BRP TXSS procedure is the MIMO BRP TXSS procedure.

18. The product of claim 16 , wherein the instructions, when executed, cause the initiator STA to set the TXSS-MIMO field to a value “1” to indicate that the BRP TXSS procedure is the MIMO BRP TXSS procedure, and to perform the initiator BRP TXSS of the MIMO BRP TXSS procedure by transmitting the one or more EDMG BRP-TX packets via the multiple transmit chains.

19. The product of claim 18 , wherein a Training (TRN) field of the one or more EDMG BRP-TX packets comprises a plurality of orthogonal waveforms, a count of the plurality of orthogonal waveforms is based on a count of the multiple transmit chains.

20. The product of claim 18 , wherein the instructions, when executed, cause the initiator STA to set a TXVECTOR parameter EDMG_TRN_LEN for the EDMG BRP-TX packets to a value, which is based on a count of Training (TRN) units for transmit training.

21. The product of claim 16 , wherein the instructions, when executed, cause the initiator STA to:

during a responder BRP TXSS of the BRP TXSS procedure, receive one or more EDMG BRP-TX packets from the responder STA; and

transmit a BRP feedback frame to the responder STA, the BRP feedback frame comprising feedback based on measurements on the one or more EDMG BRP-TX packets from the responder STA.

22. The product of claim 21 , wherein the instructions, when executed, cause the initiator STA to transmit the BRP feedback frame using a same antenna configuration as an antenna configuration for transmission of the first BRP frame.

23. The product of claim 21 , wherein the instructions, when executed, cause the initiator STA to begin the responder BRP TXSS a Medium Beamforming Inter-Frame Space (MBIFS) after the initiator BRP TXSS.

24. An apparatus comprising:

means for causing an initiator station (STA) of a Beam Refinement Protocol (BRP) Transmit (TX) Sector Sweep (TXSS) procedure to transmit a first BRP frame to initiate the BRP TXSS procedure with a responder STA, the first BRP frame comprising an Enhanced Directional Multi-Gigabit (EDMG) BRP request element comprising a TXSS Multiple Input Multiple Output (MIMO) (TXSS-MIMO) field to indicate whether the BRP TXSS procedure is a Single Input Single Output (SISO) BRP TXSS procedure or a MIMO BRP TXSS procedure;

means for processing a second BRP frame from the responder STA, the second BRP frame in response to the first BRP frame, the second BRP frame to confirm the BRP TXSS procedure; and

means for causing the initiator STA to, in accordance with the TXSS-MIMO field, perform an initiator BRP TXSS of the SISO BRP TXSS procedure or an initiator BRP TXSS of the MIMO BRP TXSS procedure, wherein the initiator BRP TXSS of the SISO BRP TXSS procedure comprises transmission of one or more EDMG BRP-TX packets to the responder STA via a single transmit chain, wherein the initiator BRP TXSS of the MIMO BRP TXSS procedure comprises transmission of the one or more EDMG BRP-TX packets to the responder STA via multiple transmit chains.

25. The apparatus of claim 24 comprising means for causing the initiator STA to:

during a responder BRP TXSS of the BRP TXSS procedure, receive one or more EDMG BRP-TX packets from the responder STA; and

transmit a BRP feedback frame to the responder STA, the BRP feedback frame comprising feedback based on measurements on the one or more EDMG BRP-TX packets from the responder STA.