Correlator-based carrier sense multiple access

A communications device, comprising:

• a processor;
• and
• a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, the operations comprising:
• obtaining a received energy detection level as part of performing an energy detection for a clear channel assessment of a wireless channel;
• obtaining a received preamble detection level as part of performing a preamble detection for the clear channel assessment, wherein the performing of the preamble detection comprises performing correlator-based physical carrier sensing for a signal part comprising a known sequence, wherein the signal part comprises a preamble transmitted with a first sampling rate that is different than a second sampling rate of the communications device, wherein the correlator-based physical carrier sensing is independent of channel part demodulation, and wherein the preamble detection makes a determination from the signal part whether the wireless channel is busy with an ongoing transmission based on cross-correlating the preamble with a stored preamble that accounts for a distortion that results from the communications device using the second sampling rate when the preamble is transmitted using the first sampling rate;
• in response to the clear channel assessment determining that the wireless channel is clear, transmitting via the wireless channel;
• and
• in response to the clear channel assessment determining that the wireless channel is busy, performing a subsequent energy detection to monitor the wireless channel, the subsequent energy detection being subsequent to the energy detection.

A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a user equipment, facilitate performance of operations, the operations comprising:

• performing a clear channel assessment of a wireless channel comprising energy detection and preamble detection, wherein the preamble detection comprises correlator-based physical carrier sensing for a signal part comprising a known sequence, wherein the signal part comprises a preamble transmitted with a first sampling rate that is different relative to a second sampling rate of the user equipment, wherein the preamble detection is without a virtual carrier sense usable to determine transmission duration;
• determining from the clear channel assessment that the wireless channel is busy with an ongoing transmission, comprising cross-correlating the preamble with a stored preamble that reduces a distortion that results from the user equipment using the second sampling rate when the preamble is transmitted using the first sampling rate;
• and
• in response to the determining that the wireless channel is busy with the ongoing transmission, performing subsequent energy detection to detect a duration of the ongoing transmission.