FDCR: A Full-Duplex Collision Resolution Scheme for Next-Generation Wireless LANs

Full-duplex capable wireless stations can detect incoming signals during transmission. Therefore, they can reduce channel time wasted in collisions by detecting a collision and stopping the ongoing transmission immediately. However, in collisions between full-duplex and legacy stations, even if the full-duplex station stops transmitting, the collision duration does not decrease since legacy stations cannot detect the collision. This letter proposes a novel medium access control scheme, called FDCR, which resolves a collision between full-duplex and legacy stations. FDCR provides collision resolution without modifying the 802.11 standard of legacy stations. When a collision occurs, the full-duplex station reports information on the colliding stations to the access point. Then transmission opportunity is granted to them. The analytical model and simulation results show that the throughput of FDCR outperforms existing studies.