A Cross-Layer-Based MAC Protocol
Ke Wang, Qianping Wang · 2008
Given the special requirements from wireless sensor networks and the disadvantages of current MAC protocol, a new cross-layer MAC protocol, which combines the physics layer and a MAC protocol, is introduced. The former layer is based on direct-sequence spread-spectrum, and the latter busy tone. First the physics layer and MAC layer were designed concretely, and then the power consumption and duty cycle of the protocol were analyzed quantitatively. Finally, the protocol was simulated on NS2 platform. Different from classic 802.11 DCF protocol, the protocol improved the efficiency ,the success ratio, the end-to-end delay, the jitter and the throughput.