A Multiple Access Protocol with Collision Avoidance and Multi- CTS Candidates for Multi-channel Ad-hoc Networks

-The multi-channel technique is a powerful scheme to improve the capacity of wireless network. CSMAC/CA based medium access protocols use carrier sense and RTS-CTS handshake to reduce the collisions of the share channel. In this paper, we propose a new MAC protocol for multi-hop ad hoc networks, which combines the CSMA/CA and Multi-channel techniques. And we call it Multiple Access with Collision Avoidance and Multi-CTS Candidates(MACA-MCC). By round robin searching scheme, MACA-MCC adequately utilizes the limited channels, and makes itself collision free. MACA-MCC uses Multi-CTS Candidates scheme to increase the successful reception of RTS and thus improve the performance. The throughput is studied analytically, and extensive simulations are presented to verify the analysis. Besides, MACA-MCC is well applicable to ad-hoc networks as it follows the widely applied specification of IEEE 802.11. Keywords—CSMA/CA, MAC, multi-channel, ad-hoc