Device, system and method to implement multiple-input multiple-output channel access rules in an enhanced directional multi-gigabit network

1. A wireless communication device of an Enhanced Directional Multi-Gigabit (EDMG) station (STA), the device comprising a memory, and processing circuitry coupled to the memory and including logic, the processing circuitry to:

perform Clear Channel Assessment (CCA) energy detection at a plurality of radio frequency (RF) chains of the EDMG STA;

in response to a determination that CCA is clear for only a first RF chain of the plurality of RF chains, and that a backoff timer of the EDMG STA has reached zero, cause transmission of a Single Input Single Output (SISO) EDMG communication; and

in response to a determination that CCA for the plurality of RF chains is clear, and that the backoff timer has reached zero, cause transmission of a Multiple-Input Multiple-Output (MIMO) EDMG communication, wherein the plurality of RF chains includes a primary RF chain and a plurality of secondary RF chains, and wherein the processing circuitry is further configured to cause preamble detection using only the primary RF chain to maintain a Network Allocation Vector (NAV).

2. The device of claim 1 , wherein the MIMO communication is a multi-user (MU) MIMO communication.

3. The device of claim 1 , further comprising the plurality of RF chains, the RF chains being coupled to the processing circuitry.

4. The device of claim 3 , further comprising at least one phased array antenna coupled to the RF chains.

5. The device of claim 1 , further comprising:

the plurality of RF chains, the RF chains being coupled to the processing circuitry; and

a plurality of phased array antennas, each of the plurality of phased array antennas coupled to a corresponding RF chain of the plurality of RF chains.

6. The device of claim 1 , further comprising:

the plurality of RF chains, the RF chains being coupled to the processing circuitry; and

a phased array antenna coupled to the plurality of RF chains, wherein the phased array antenna includes a first antenna portion having a first polarization, and a second antenna portion having a second polarization orthogonal to the first polarization, the first antenna portion being coupled to one RF chain of the plurality of RF chains, and the second antenna portion being coupled to another RF chain of the plurality of RF chains.

7. 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 computer processor, cause the at least one computer processor to implement operations at a wireless communication device of an Enhanced Directional Multi-Gigabig (EDMG) station (STA), the operations comprising:

performing Clear Channel Assessment (CCA) energy detection at a plurality of radio frequency (RF) chains of the EDMG STA;

in response to a determination that CCA is clear for only a first RF chain of the plurality of RF chains, and that a backoff timer of the EDMG STA has reached zero, causing transmission of a Single Input Single Output (SISO) EDMG communication; and

in response to a determination that CCA for the plurality of RF chains is clear, and that the backoff timer has reached zero, causing transmission of a Multiple-Input Multiple-Output (MIMO) EDMG communication, wherein the plurality of RF chains includes a primary RF chain and a plurality of secondary RF chains, the operations further including causing preamble detection using only the primary RF chain to maintain the Network Allocation Vector (NAV).

8. The product of claim 7 , wherein the MIMO communication is a multi-user (MU) MIMO communication.

9. A method to be used at a wireless communication device of an Enhanced Directional Multi-Gigabig (EDMG) station (STA), the method comprising:

performing Clear Channel Assessment (CCA) energy detection at a plurality of radio frequency (RF) chains of the EDMG STA;

in response to a determination that CCA is clear for only a first RF chain of the plurality of RF chains, and that a backoff timer of the EDMG STA has reached zero, causing transmission of a Single Input Single Output (SISO) EDMG communication; and

in response to a determination that CCA for the plurality of RF chains is clear, and that the backoff timer has reached zero, causing transmission of a Multiple-Input Multiple-Output (MIMO) EDMG communication, wherein the plurality of RF chains includes a primary RF chain and a plurality of secondary RF chains, the method further including causing preamble detection using only the primary RF chain to maintain the Network Allocation Vector (NAV).

10. The method of claim 9 , wherein the MIMO communication is a multi-user (MU) MIMO communication.

11. A wireless communication device of an Enhanced Directional Multi-Gigabig (EDMG) station (STA), the device comprising:

means for performing Clear Channel Assessment (CCA) energy detection at a plurality of radio frequency (RF) chains of the EDMG STA;

means for, in response to a determination that CCA is clear for only a first RF chain of the plurality of RF chains, and that a backoff timer of the EDMG STA has reached zero, causing transmission of a Single Input Single Output (SISO) EDMG communication; and

means for, in response to a determination that CCA for the plurality of RF chains is clear, and that the backoff timer has reached zero, causing transmission of a Multiple-Input Multiple-Output (MIMO) EDMG communication, wherein the plurality of RF chains includes a primary RF chain and a plurality of secondary RF chains, the method further including causing preamble detection using only the primary RF chain to maintain the Network Allocation Vector (NAV).

12. The device of claim 11 , wherein the MIMO communication is a multi-user (MU) MIMO communication.