Techniques for interference mitigation in directional multi-gigabit networks
View Patent ↗Techniques for interference mitigation in directional multi-gigabit networks are described. In one embodiment, for example, an apparatus may comprise logic, at least a portion of which is in hardware, the logic to send, from a source device, a first reverse direction grant (RDG) indicating that a sink device may transmit to the source device, detect interference with a received sink device data transmission at the source device, select a grant deferral period, and upon conclusion of the grant deferral period, send a second RDG indicating that the sink device may transmit to the source device. Other embodiments are described and claimed.
1. An apparatus, comprising:
processing circuitry;
logic, at least a portion of which is operable by the processing circuitry, the logic to:
send, from a source device, a first reverse direction grant (RDG) indicating that a sink device is permitted to transmit to the source device during a time duration,
successfully receive a physical layer convergence procedure (PLCP) header of a received sink device data transmission and identify the received sink device data transmission based on the PLCP header,
detect interference with the received sink device data transmission at the source device based on one or more remaining portions of the received sink device data transmission unsuccessfully received,
in response to detection of the interference with the received sink device data transmission, randomly select a grant deferral period, the grant deferral period selected to elapse prior to the time duration, and
upon conclusion of the grant deferral period, send a second RDG indicating that the sink device is permitted to transmit to the source device during the time duration.
2. The apparatus of claim 1 , the logic to determine that the received sink device data transmission includes an acknowledgment request and withhold an acknowledgment of the received sink device data transmission based on the detected interference.
3. The apparatus of claim 1 , the logic to detect the interference with the received sink device data transmission based on a failed cyclic redundancy code (CRC) validation.
4. The apparatus of claim 1 , the logic to receive a sink device acknowledgment message in response to the first RDG prior to receiving the received sink device data transmission and send a data transmission to the sink device during the grant deferral period.
5. The apparatus of claim 4 , the sink device acknowledgment message comprising a quality of service (QoS) media access control (MAC) protocol data unit (MPDU) or a block acknowledgment (BA) MPDU.
6. The apparatus of claim 1 , the logic to send the second RDG prior to an expiration of the time duration, the time duration identified by a field in the first RDG.
7. The apparatus of claim 1 , comprising:
a radio frequency (RF) transceiver; and
one or more RF antennas.
8. At least one non-transitory machine-readable medium comprising a set of instructions that, in response to being executed on a computing device, cause the computing device to:
send, from a source device, a first reverse direction grant (RDG) indicating that a sink device is permitted to transmit to the source device during a time duration;
successfully receive a physical layer convergence procedure (PLCP) header of a received sink device data transmission;
identify the received sink device data transmission based on the PLCP header;
detect interference with a received sink device data transmission at the source device based on one or more remaining portions of the received sink device data transmission unsuccessfully received;
in response to detection of the interference with the received sink device data transmission, randomly select a grant deferral period, the grant deferral period selected to elapse prior to the time duration; and
upon conclusion of the grant deferral period, send a second RDG indicating that the sink device is permitted to transmit to the source device during the time duration.
9. The at least one non-transitory machine-readable medium of claim 8 , comprising instructions that, in response to being executed on the computing device, cause the computing device to:
determine that the received sink device data transmission includes an acknowledgment request; and
withhold an acknowledgment of the received sink device data transmission based on the detected interference.
10. The at least one non-transitory machine-readable medium of claim 8 , comprising instructions that, in response to being executed on the computing device, cause the computing device to detect the interference with the received sink device data transmission based on a failed cyclic redundancy code (CRC) validation.
11. The at least one non-transitory machine-readable medium of claim 8 , comprising instructions that, in response to being executed on the computing device, cause the computing device to:
receive a sink device acknowledgment message in response to the first RDG prior to receiving the received sink device data transmission; and
send a data transmission to the sink device during the grant deferral period.
12. The at least one non-transitory machine-readable medium of claim 11 , the sink device acknowledgment message comprising a quality of service (QoS) media access control (MAC) protocol data unit (MPDU) or a block acknowledgment (BA) MPDU.
13. The at least one non-transitory machine-readable medium of claim 8 , comprising instructions that, in response to being executed on the computing device, cause the computing device to send the second RDG prior to an expiration of the time duration, the time duration identified by a field in the first RDG.
14. A method, comprising:
sending, from a source device, a first reverse direction grant (RDG) indicating that a sink device is permitted to transmit to the source device during a time duration;
successfully receive a physical layer convergence procedure (PLCP) header of a received sink device data transmission;
identify the received sink device data transmission based on the PLCP header;
detecting interference with a received sink device data transmission at the source device based on one or more remaining portions of the received sink device data transmission unsuccessfully received;
in response to detecting the interference with the received sink device data transmission, randomly selecting, by a processor circuit, a grant deferral period, the grant deferral period selected to elapse prior to the time duration; and
upon conclusion of the grant deferral period, sending a second RDG indicating that the sink device is permitted to transmit to the source device during the time duration.
15. The method of claim 14 , comprising:
determining that the received sink device data transmission includes an acknowledgment request; and
withholding an acknowledgment of the received sink device data transmission based on the detected interference.
16. The method of claim 14 , comprising detecting the interference with the received sink device data transmission based on a failed cyclic redundancy code (CRC) validation.
17. The method of claim 14 , comprising:
receiving a sink device acknowledgment message in response to the first RDG prior to receiving the received sink device data transmission; and
sending a data transmission to the sink device during the grant deferral period.
18. The method of claim 17 , the sink device acknowledgment message comprising a quality of service (QoS) media access control (MAC) protocol data unit (MPDU) or a block acknowledgment (BA) MPDU.
19. The method of claim 14 , comprising sending the second RDG prior to an expiration of the time duration, the time duration identified by a field in the first RDG.