Cross-Layer Adaptive End-to-End Delay Control for Asynchronous Duty-Cycle Wireless Sensor Networks

摘要

Most sensor networks require application-specific network-wide performance guarantees, suggesting the need for adaptive parameters and flexible network optimization. Since sleep scheduling degrades the end-to-end delay performance in asynchronous duty-cycle wireless sensor networks, we propose a Cross-Layer Adaptive Duty Cycle (CLA-DC) control by dynamically adjusting the sleep interval to achieve the desired end-to-end delay guarantees. CLA-DC extracts information from the application, routing, data link and MAC layers to estimate the single-hop transmission delays along a multi-hop path that affect the end-to-end delay requirement. Experimental results verify the availability of the single-hop delay mode for end-to-end delay guarantees in CLA-DC, and prove that CLA-DC outperforms Simple-DC on meeting the end-to-end delay requirements by adopting cross-layer design approach, especially when the number of flows increases.