Carrier sensing multiple access with collision resolution (CSMA/CR) protocol for next-generation wireless LAN
Hyun-Ho Choi, Howon Lee, In-Ho Lee · 2013
This paper proposes a distributed medium access control (MAC) protocol called carrier sensing multiple access with collision resolution (CSMA/CR) based on a fully connected single hop network considering next-generation wireless LAN environments with a high density of stations. The proposed CSMA/CR follows the typical CSMA/CA protocol and identifies a collision by additional sensing after data transmission starts without a ready-to-send (RTS) and clear-to-send (CTS) exchange. If one station detects a collision, it transmits a jam signal to stop the other stations' transmissions and has access priority for the retransmission without backoff, which prevents the next collision that may occur. The simulation results show that the proposed CSMA/CR has a low overhead due to the detection of a collision without an RTS/CTS exchange and always achieves the best throughput regardless of the number of access stations by using the collision resolution scheme.