Collision Prevention for Duty-Cycle Receiver-Initiation MAC Protocol via Multiple Access Reservation (MAR-RiMAC).

Area of Science:

• Computer Science
• Electrical Engineering
• Wireless Communication

Background:

• The Internet of Things (IoT) involves numerous wireless devices with limited capabilities needing internet connectivity.
• Wireless channels are a key bottleneck in IoT networks, necessitating efficient Medium Access Control (MAC) protocols.
• Receiver-initiated MAC protocols are suitable for IoT and Wireless Sensor Networks (WSNs) due to their duty-cycling nature.

Purpose of the Study:

• To address the collision issue in receiver-initiated MAC protocols when multiple devices respond simultaneously.
• To enhance the receiver-initiated approach to prevent collisions and improve network efficiency.
• To evaluate the performance of the enhanced protocol against existing ones, particularly under high traffic loads.

Main Methods:

• Devised an enhancement to the receiver-initiated approach involving devices sending a predefined signal to indicate simultaneous transmission intent.
• Implemented a four-way handshake mechanism where the receiver polls devices sequentially after they signal their intent.
• Compared the performance of the enhanced Receiver-Initiated-MAC protocol (RI-MAC) with the original RI-MAC.

Main Results:

• The enhanced receiver-initiated approach effectively prevents simultaneous transmissions and subsequent collisions.
• Superior air-time utilization was demonstrated under high traffic loads compared to the standard RI-MAC protocol.
• The enhancement proved particularly effective in mitigating issues caused by hidden terminals in the network.

Conclusions:

• The proposed enhancement significantly improves the efficiency of receiver-initiated MAC protocols for IoT networks.
• This method offers a viable solution for managing dense IoT networks with limited device capabilities.
• The optimized collision avoidance strategy leads to better overall network performance and resource utilization.