CBH-MAC Protocol for Multihop QoS in Wireless Sensor Networks
This paper proposes an efficient hybrid MAC for multi-hop QoS protocol in Wireless Sensor Networks for delay sensitive data traffic. The authors present Contention Based Hybrid MAC (CBH-MAC) protocol for both chain and cross topology, which reduces end-to-end delay, energy efficiency and maximizes the packet delivery ratio by minimizing the contention at the nodes. Here, a node operates the reservation procedure at the contention-based period and reserves a time slot in the adaptive contention-free time. All the neighbor nodes of the sender and receiver receive their own reservation control packets. Once reserved, the sender transmits data and receives ACK packets at the adaptive contention-free time.