  Ad Hoc networks with multi-hop topology are widely used in military and
civilian applications. One challenge for Ad Hoc networks is to design efficient
Media Access Control (MAC) protocols to ensure the quality of service (QoS). In
Ad Hoc networks, there is a kind of node called key node, which undertakes more
forwarding traffic than other surrounding nodes. The number of neighbor nodes
around key nodes is often large, and the surrounding channel environment and
interference are often more complex. Thus, the key nodes can hardly get enough
channel access opportunities, resulting in poor end-to-end performance.
Therefore, we propose an adaptive channel reservation MAC protocol based on
forwarding traffic of key nodes, which is aimed at alleviating the congestion
for key nodes. Nodes initiate reservations for future transmission time
according to the buffer status before sending packets and then calculate the
Weight of Reservation Ability (WRA). The node adaptively adjusts its
reservation opportunity by comparing the WRA with neighbor nodes, thus
improving the channel access efficiency and ensuring the transmission
opportunity of key nodes. Extensive simulation confirms that our proposed
FTKN-CRM provides significant improvements in end-to-end performance over the
IEEE 802.11ax protocol and other reservation access protocols.
